gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   5 # 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   6
   7 #This file is part of GCC.
   8
   9 #GCC is free software; you can redistribute it and/or modify it under
  10 #the terms of the GNU General Public License as published by the Free
  11 #Software Foundation; either version 3, or (at your option) any later
  12 #version.
  13
  14 #GCC is distributed in the hope that it will be useful, but WITHOUT
  15 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 #FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 #for more details.
  18
  19 #You should have received a copy of the GNU General Public License
  20 #along with GCC; see the file COPYING3.  If not see
  21 #<http://www.gnu.org/licenses/>.
  22
  23 # --------------------------------
  24 # Initialization and sanity checks
  25 # --------------------------------
  26
  27 AC_PREREQ(2.64)
  28 AC_INIT
  29 AC_CONFIG_SRCDIR(tree.c)
  30 AC_CONFIG_HEADER(auto-host.h:config.in)
  31
  32 gcc_version=`cat $srcdir/BASE-VER`
  33
  34 # Determine the host, build, and target systems
  35 AC_CANONICAL_BUILD
  36 AC_CANONICAL_HOST
  37 AC_CANONICAL_TARGET
  38
  39 # Determine the noncanonical target name, for directory use.
  40 ACX_NONCANONICAL_TARGET
  41
  42 # Determine the target- and build-specific subdirectories
  43 GCC_TOPLEV_SUBDIRS
  44
  45 # Set program_transform_name
  46 AC_ARG_PROGRAM
  47
  48 # Check for bogus environment variables.
  49 # Test if LIBRARY_PATH contains the notation for the current directory
  50 # since this would lead to problems installing/building glibc.
  51 # LIBRARY_PATH contains the current directory if one of the following
  52 # is true:
  53 # - one of the terminals (":" and ";") is the first or last sign
  54 # - two terminals occur directly after each other
  55 # - the path contains an element with a dot in it
  56 AC_MSG_CHECKING(LIBRARY_PATH variable)
  57 changequote(,)dnl
  58 case ${LIBRARY_PATH} in
  59   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  60     library_path_setting="contains current directory"
  61     ;;
  62   *)
  63     library_path_setting="ok"
  64     ;;
  65 esac
  66 changequote([,])dnl
  67 AC_MSG_RESULT($library_path_setting)
  68 if test "$library_path_setting" != "ok"; then
  69 AC_MSG_ERROR([
  70 *** LIBRARY_PATH shouldn't contain the current directory when
  71 *** building gcc. Please change the environment variable
  72 *** and run configure again.])
  73 fi
  74
  75 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  76 # since this would lead to problems installing/building glibc.
  77 # GCC_EXEC_PREFIX contains the current directory if one of the following
  78 # is true:
  79 # - one of the terminals (":" and ";") is the first or last sign
  80 # - two terminals occur directly after each other
  81 # - the path contains an element with a dot in it
  82 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  83 changequote(,)dnl
  84 case ${GCC_EXEC_PREFIX} in
  85   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  86     gcc_exec_prefix_setting="contains current directory"
  87     ;;
  88   *)
  89     gcc_exec_prefix_setting="ok"
  90     ;;
  91 esac
  92 changequote([,])dnl
  93 AC_MSG_RESULT($gcc_exec_prefix_setting)
  94 if test "$gcc_exec_prefix_setting" != "ok"; then
  95 AC_MSG_ERROR([
  96 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
  97 *** building gcc. Please change the environment variable
  98 *** and run configure again.])
  99 fi
 100
 101 # -----------
 102 # Directories
 103 # -----------
 104
 105 # Specify the local prefix
 106 local_prefix=
 107 AC_ARG_WITH(local-prefix,
 108 [  --with-local-prefix=DIR specifies directory to put local include],
 109 [case "${withval}" in
 110 yes)    AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
 111 no)     ;;
 112 *)      local_prefix=$with_local_prefix ;;
 113 esac])
 114
 115 # Default local prefix if it is empty
 116 if test x$local_prefix = x; then
 117         local_prefix=/usr/local
 118 fi
 119
 120 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 121 # passed in by the toplevel make and thus we'd get different behavior
 122 # depending on where we built the sources.
 123 gcc_gxx_include_dir=
 124 # Specify the g++ header file directory
 125 AC_ARG_WITH(gxx-include-dir,
 126 [  --with-gxx-include-dir=DIR
 127                           specifies directory to put g++ header files],
 128 [case "${withval}" in
 129 yes)    AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
 130 no)     ;;
 131 *)      gcc_gxx_include_dir=$with_gxx_include_dir ;;
 132 esac])
 133
 134 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 135 if test x${gcc_gxx_include_dir} = x; then
 136   if test x${enable_version_specific_runtime_libs} = xyes; then
 137     gcc_gxx_include_dir='${libsubdir}/include/c++'
 138   else
 139     libstdcxx_incdir='include/c++/$(version)'
 140     if test x$host != x$target; then
 141        libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
 142     fi
 143     gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
 144   fi
 145 fi
 146
 147 AC_ARG_WITH(cpp_install_dir,
 148 [  --with-cpp-install-dir=DIR
 149                           install the user visible C preprocessor in DIR
 150                           (relative to PREFIX) as well as PREFIX/bin],
 151 [if test x$withval = xyes; then
 152   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 153 elif test x$withval != xno; then
 154   cpp_install_dir=$withval
 155 fi])
 156
 157 # We would like to our source tree to be readonly.  However when releases or
 158 # pre-releases are generated, the flex/bison generated files as well as the
 159 # various formats of manuals need to be included along with the rest of the
 160 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 161 # just that.
 162
 163 AC_MSG_CHECKING([whether to place generated files in the source directory])
 164   dnl generated-files-in-srcdir is disabled by default
 165   AC_ARG_ENABLE(generated-files-in-srcdir,
 166 [  --enable-generated-files-in-srcdir
 167                           put copies of generated files in source dir
 168                           intended for creating source tarballs for users
 169                           without texinfo bison or flex.],
 170       generated_files_in_srcdir=$enableval,
 171       generated_files_in_srcdir=no)
 172
 173 AC_MSG_RESULT($generated_files_in_srcdir)
 174
 175 if test "$generated_files_in_srcdir" = "yes"; then
 176   GENINSRC=''
 177 else
 178   GENINSRC='#'
 179 fi
 180 AC_SUBST(GENINSRC)
 181
 182 # -------------------
 183 # Find default linker
 184 # -------------------
 185
 186 # With GNU ld
 187 AC_ARG_WITH(gnu-ld,
 188 [  --with-gnu-ld           arrange to work with GNU ld.],
 189 gnu_ld_flag="$with_gnu_ld",
 190 gnu_ld_flag=no)
 191
 192 # With pre-defined ld
 193 AC_ARG_WITH(ld,
 194 [  --with-ld               arrange to use the specified ld (full pathname)],
 195 DEFAULT_LINKER="$with_ld")
 196 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 197   if test ! -x "$DEFAULT_LINKER"; then
 198     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 199   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 200     gnu_ld_flag=yes
 201   fi
 202   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 203         [Define to enable the use of a default linker.])
 204 fi
 205
 206 gnu_ld=`if test x"$gnu_ld_flag" = x"yes"; then echo 1; else echo 0; fi`
 207 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld, [Define if using GNU ld.])
 208
 209 AC_MSG_CHECKING([whether a default linker was specified])
 210 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 211   if test x"$gnu_ld_flag" = x"no"; then
 212     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 213   else
 214     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 215   fi
 216 else
 217   AC_MSG_RESULT(no)
 218 fi
 219
 220 # With demangler in GNU ld
 221 AC_ARG_WITH(demangler-in-ld,
 222 [  --with-demangler-in-ld  try to use demangler in GNU ld.],
 223 demangler_in_ld="$with_demangler_in_ld",
 224 demangler_in_ld=no)
 225
 226 # ----------------------
 227 # Find default assembler
 228 # ----------------------
 229
 230 # With GNU as
 231 AC_ARG_WITH(gnu-as,
 232 [  --with-gnu-as           arrange to work with GNU as],
 233 gas_flag="$with_gnu_as",
 234 gas_flag=no)
 235
 236 AC_ARG_WITH(as,
 237 [  --with-as               arrange to use the specified as (full pathname)],
 238 DEFAULT_ASSEMBLER="$with_as")
 239 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 240   if test ! -x "$DEFAULT_ASSEMBLER"; then
 241     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 242   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 243     gas_flag=yes
 244   fi
 245   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 246         [Define to enable the use of a default assembler.])
 247 fi
 248
 249 gnu_as=`if test x"$gas_flag" = x"yes"; then echo 1; else echo 0; fi`
 250 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as, [Define if using GNU as.])
 251
 252 AC_MSG_CHECKING([whether a default assembler was specified])
 253 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 254   if test x"$gas_flag" = x"no"; then
 255     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 256   else
 257     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 258   fi
 259 else
 260   AC_MSG_RESULT(no)
 261 fi
 262
 263 # ---------------
 264 # Find C compiler
 265 # ---------------
 266
 267 # If a non-executable a.out is present (e.g. created by GNU as above even if
 268 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 269 # file, even when creating an executable, so an execution test fails.
 270 # Remove possible default executable files to avoid this.
 271 #
 272 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 273 # Autoconf includes it.
 274 rm -f a.out a.exe b.out
 275
 276 # Find the native compiler
 277 AC_PROG_CC
 278 AM_PROG_CC_C_O
 279 AC_PROG_CXX
 280 ACX_PROG_GNAT([-I"$srcdir"/ada])
 281
 282 # autoconf is lame and doesn't give us any substitution variable for this.
 283 if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
 284   NO_MINUS_C_MINUS_O=yes
 285 else
 286   OUTPUT_OPTION='-o $@'
 287 fi
 288 AC_SUBST(NO_MINUS_C_MINUS_O)
 289 AC_SUBST(OUTPUT_OPTION)
 290
 291 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 292 # optimizations to be activated explicitly by the toplevel.
 293 case "$CC" in
 294   */prev-gcc/xgcc*) ;;
 295   *) CFLAGS=`echo $CFLAGS | sed "s/-O[[s0-9]]* *//" ` ;;
 296 esac
 297 AC_SUBST(CFLAGS)
 298
 299 # -------------------------
 300 # Check C compiler features
 301 # -------------------------
 302
 303 AC_USE_SYSTEM_EXTENSIONS
 304 AC_PROG_CPP
 305 AC_C_INLINE
 306
 307 AC_SYS_LARGEFILE
 308
 309 # sizeof(char) is 1 by definition.
 310 AC_CHECK_SIZEOF(void *)
 311 AC_CHECK_SIZEOF(short)
 312 AC_CHECK_SIZEOF(int)
 313 AC_CHECK_SIZEOF(long)
 314 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 315 AC_CHECK_TYPES([__int64], [AC_CHECK_SIZEOF(__int64)])
 316 GCC_STDINT_TYPES
 317
 318 # ---------------------
 319 # Warnings and checking
 320 # ---------------------
 321
 322 # Check $CC warning features (if it's GCC).
 323 # We want to use -pedantic, but we don't want warnings about
 324 # * 'long long'
 325 # * variadic macros
 326 # * overlong strings
 327 # So, we only use -pedantic if we can disable those warnings.
 328
 329 ACX_PROG_CC_WARNING_OPTS(
 330         m4_quote(m4_do([-W -Wall -Wwrite-strings -Wcast-qual])), [loose_warn])
 331 ACX_PROG_CC_WARNING_OPTS(
 332         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
 333         [c_loose_warn])
 334 ACX_PROG_CC_WARNING_OPTS(
 335         m4_quote(m4_do([-Wmissing-format-attribute])), [strict_warn])
 336 ACX_PROG_CC_WARNING_OPTS(
 337         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 338 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC(
 339         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 340                        [-Wno-overlength-strings])), [strict_warn])
 341 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 342
 343 # The above macros do nothing if the compiler is not GCC.  However, the
 344 # Makefile has more goo to add other flags, so these variables are used
 345 # to enable warnings only for GCC.
 346 warn_cflags=
 347 warn_cxxflags=
 348 if test "x$GCC" = "xyes"; then
 349   warn_cflags='$(GCC_WARN_CFLAGS)'
 350   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 351 fi
 352 AC_SUBST(warn_cflags)
 353 AC_SUBST(warn_cxxflags)
 354
 355 # Enable expensive internal checks
 356 is_release=
 357 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 358   is_release=yes
 359 fi
 360
 361 AC_ARG_ENABLE(checking,
 362 [  --enable-checking[=LIST]
 363                           enable expensive run-time checks.  With LIST,
 364                           enable only specific categories of checks.
 365                           Categories are: yes,no,all,none,release.
 366                           Flags are: assert,df,fold,gc,gcac,gimple,misc,
 367                           rtlflag,rtl,runtime,tree,valgrind,types.],
 368 [ac_checking_flags="${enableval}"],[
 369 # Determine the default checks.
 370 if test x$is_release = x ; then
 371   ac_checking_flags=yes
 372 else
 373   ac_checking_flags=release
 374 fi])
 375 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 376 for check in release $ac_checking_flags
 377 do
 378         case $check in
 379         # these set all the flags to specific states
 380         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 381                         ac_fold_checking= ; ac_gc_checking=1 ;
 382                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 383                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 384                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 385                         ac_types_checking=1 ;;
 386         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 387                         ac_fold_checking= ; ac_gc_checking= ;
 388                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 389                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 390                         ac_tree_checking= ; ac_valgrind_checking= ;
 391                         ac_types_checking= ;;
 392         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 393                         ac_fold_checking=1 ; ac_gc_checking=1 ;
 394                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 395                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 396                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 397                         ac_types_checking=1 ;;
 398         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 399                         ac_fold_checking= ; ac_gc_checking= ;
 400                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 401                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 402                         ac_tree_checking= ; ac_valgrind_checking= ;
 403                         ac_types_checking= ;;
 404         # these enable particular checks
 405         assert)         ac_assert_checking=1 ;;
 406         df)             ac_df_checking=1 ;;
 407         fold)           ac_fold_checking=1 ;;
 408         gc)             ac_gc_checking=1 ;;
 409         gcac)           ac_gc_always_collect=1 ;;
 410         gimple)         ac_gimple_checking=1 ;;
 411         misc)           ac_checking=1 ;;
 412         rtl)            ac_rtl_checking=1 ;;
 413         rtlflag)        ac_rtlflag_checking=1 ;;
 414         runtime)        ac_runtime_checking=1 ;;
 415         tree)           ac_tree_checking=1 ;;
 416         types)          ac_types_checking=1 ;;
 417         valgrind)       ac_valgrind_checking=1 ;;
 418         *)      AC_MSG_ERROR(unknown check category $check) ;;
 419         esac
 420 done
 421 IFS="$ac_save_IFS"
 422
 423 nocommon_flag=""
 424 if test x$ac_checking != x ; then
 425   AC_DEFINE(ENABLE_CHECKING, 1,
 426 [Define if you want more run-time sanity checks.  This one gets a grab
 427    bag of miscellaneous but relatively cheap checks.])
 428   nocommon_flag=-fno-common
 429 fi
 430 AC_SUBST(nocommon_flag)
 431 if test x$ac_df_checking != x ; then
 432   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 433 [Define if you want more run-time sanity checks for dataflow.])
 434 fi
 435 if test x$ac_assert_checking != x ; then
 436   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 437 [Define if you want assertions enabled.  This is a cheap check.])
 438 fi
 439 if test x$ac_gimple_checking != x ; then
 440   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 441 [Define if you want operations on GIMPLE (the basic data structure of
 442 the high-level optimizers) to be checked for dynamic type safety at
 443 runtime.  This is moderately expensive.])
 444 fi
 445 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 446 if test x$ac_runtime_checking != x ; then
 447   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 448 [Define if you want runtime assertions enabled.  This is a cheap check.])
 449 fi
 450 if test x$ac_tree_checking != x ; then
 451   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 452 [Define if you want all operations on trees (the basic data
 453    structure of the front ends) to be checked for dynamic type safety
 454    at runtime.  This is moderately expensive.  The tree browser debugging
 455    routines will also be enabled by this option.
 456    ])
 457   TREEBROWSER=tree-browser.o
 458 fi
 459 if test x$ac_types_checking != x ; then
 460   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 461 [Define if you want all gimple types to be verified after gimplifiation.
 462    This is cheap.
 463    ])
 464 fi
 465 AC_SUBST(TREEBROWSER)
 466 if test x$ac_rtl_checking != x ; then
 467   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 468 [Define if you want all operations on RTL (the basic data structure
 469    of the optimizer and back end) to be checked for dynamic type safety
 470    at runtime.  This is quite expensive.])
 471 fi
 472 if test x$ac_rtlflag_checking != x ; then
 473   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 474 [Define if you want RTL flag accesses to be checked against the RTL
 475    codes that are supported for each access macro.  This is relatively
 476    cheap.])
 477 fi
 478 if test x$ac_gc_checking != x ; then
 479   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 480 [Define if you want the garbage collector to do object poisoning and
 481    other memory allocation checks.  This is quite expensive.])
 482 fi
 483 if test x$ac_gc_always_collect != x ; then
 484   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 485 [Define if you want the garbage collector to operate in maximally
 486    paranoid mode, validating the entire heap and collecting garbage at
 487    every opportunity.  This is extremely expensive.])
 488 fi
 489 if test x$ac_fold_checking != x ; then
 490   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 491 [Define if you want fold checked that it never destructs its argument.
 492    This is quite expensive.])
 493 fi
 494 valgrind_path_defines=
 495 valgrind_command=
 496
 497 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 498 dnl # an if statement.  This was the source of very frustrating bugs
 499 dnl # in converting to autoconf 2.5x!
 500 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 501
 502 if test x$ac_valgrind_checking != x ; then
 503   # It is certainly possible that there's valgrind but no valgrind.h.
 504   # GCC relies on making annotations so we must have both.
 505   AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 506   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 507     [[#include <valgrind/memcheck.h>
 508 #ifndef VALGRIND_DISCARD
 509 #error VALGRIND_DISCARD not defined
 510 #endif]])],
 511   [gcc_cv_header_valgrind_memcheck_h=yes],
 512   [gcc_cv_header_valgrind_memcheck_h=no])
 513   AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 514   AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 515   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 516     [[#include <memcheck.h>
 517 #ifndef VALGRIND_DISCARD
 518 #error VALGRIND_DISCARD not defined
 519 #endif]])],
 520   [gcc_cv_header_memcheck_h=yes],
 521   [gcc_cv_header_memcheck_h=no])
 522   AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 523   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 524         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 525   if test "x$valgrind_path" = "x" \
 526     || (test $have_valgrind_h = no \
 527         && test $gcc_cv_header_memcheck_h = no \
 528         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 529         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 530   fi
 531   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 532   valgrind_command="$valgrind_path -q"
 533   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 534 [Define if you want to run subprograms and generated programs
 535    through valgrind (a memory checker).  This is extremely expensive.])
 536   if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 537     AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 538         [Define if valgrind's valgrind/memcheck.h header is installed.])
 539   fi
 540   if test $gcc_cv_header_memcheck_h = yes; then
 541     AC_DEFINE(HAVE_MEMCHECK_H, 1,
 542         [Define if valgrind's memcheck.h header is installed.])
 543   fi
 544 fi
 545 AC_SUBST(valgrind_path_defines)
 546 AC_SUBST(valgrind_command)
 547
 548 # Enable code coverage collection
 549 AC_ARG_ENABLE(coverage,
 550 [  --enable-coverage[=LEVEL]
 551                           enable compiler's code coverage collection.
 552                           Use to measure compiler performance and locate
 553                           unused parts of the compiler. With LEVEL, specify
 554                           optimization. Values are opt, noopt,
 555                           default is noopt],
 556 [case "${enableval}" in
 557   yes|noopt)
 558     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
 559     ;;
 560   opt)
 561     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
 562     ;;
 563   no)
 564     # a.k.a. --disable-coverage
 565     coverage_flags=""
 566     ;;
 567   *)
 568     AC_MSG_ERROR(unknown coverage setting $enableval)
 569     ;;
 570 esac],
 571 [coverage_flags=""])
 572 AC_SUBST(coverage_flags)
 573
 574 AC_ARG_ENABLE(gather-detailed-mem-stats,
 575 [  --enable-gather-detailed-mem-stats         enable detailed memory allocation stats gathering], [],
 576 [enable_gather_detailed_mem_stats=no])
 577 if test x$enable_gather_detailed_mem_stats = xyes ; then
 578   AC_DEFINE(GATHER_STATISTICS, 1,
 579         [Define to enable detailed memory allocation stats gathering.])
 580 fi
 581
 582 # -------------------------------
 583 # Miscenalleous configure options
 584 # -------------------------------
 585
 586 # See if we are building gcc with C++.
 587 AC_ARG_ENABLE(build-with-cxx,
 588 [  --enable-build-with-cxx build with C++ compiler instead of C compiler],
 589 ENABLE_BUILD_WITH_CXX=$enableval,
 590 ENABLE_BUILD_WITH_CXX=no)
 591 AC_SUBST(ENABLE_BUILD_WITH_CXX)
 592 if test "$ENABLE_BUILD_WITH_CXX" = "yes"; then
 593   AC_DEFINE(ENABLE_BUILD_WITH_CXX, 1,
 594             [Define if building with C++.])
 595 fi
 596
 597 # With stabs
 598 AC_ARG_WITH(stabs,
 599 [  --with-stabs            arrange to use stabs instead of host debug format],
 600 stabs="$with_stabs",
 601 stabs=no)
 602
 603 # Determine whether or not multilibs are enabled.
 604 AC_ARG_ENABLE(multilib,
 605 [  --enable-multilib       enable library support for multiple ABIs],
 606 [], [enable_multilib=yes])
 607 AC_SUBST(enable_multilib)
 608
 609 # Enable __cxa_atexit for C++.
 610 AC_ARG_ENABLE(__cxa_atexit,
 611 [  --enable-__cxa_atexit   enable __cxa_atexit for C++],
 612 [], [])
 613
 614 # Enable C extension for decimal float if target supports it.
 615 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
 616
 617 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 618 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 619 [Define to 1 to enable decimal float extension to C.])
 620
 621 # Use default_decimal_float for dependency.
 622 enable_decimal_float=$default_decimal_float
 623
 624 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 625 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 626 [Define to 1 to specify that we are using the BID decimal floating
 627 point format instead of DPD])
 628
 629 # Enable C extension for fixed-point arithmetic.
 630 AC_ARG_ENABLE(fixed-point,
 631 [  --enable-fixed-point    enable fixed-point arithmetic extension to C],
 632 [
 633 ],
 634 [
 635   case $target in
 636     mips*-*-*)
 637       case $host in
 638         mips*-sgi-irix*)
 639           AC_MSG_WARN([fixed-point is not supported on IRIX, ignored])
 640           enable_fixed_point=no
 641           ;;
 642         *)
 643           enable_fixed_point=yes
 644           ;;
 645       esac
 646       ;;
 647     *)
 648       AC_MSG_WARN([fixed-point is not supported for this target, ignored])
 649       enable_fixed_point=no
 650       ;;
 651   esac
 652 ])
 653 AC_SUBST(enable_fixed_point)
 654
 655 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 656 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 657 [Define to 1 to enable fixed-point arithmetic extension to C.])
 658
 659 # Enable threads
 660 # Pass with no value to take the default
 661 # Pass with a value to specify a thread package
 662 AC_ARG_ENABLE(threads,
 663 [  --enable-threads        enable thread usage for target GCC
 664   --enable-threads=LIB    use LIB thread package for target GCC],,
 665 [enable_threads=''])
 666
 667 AC_ARG_ENABLE(tls,
 668 [  --enable-tls            enable or disable generation of tls code
 669                           overriding the assembler check for tls support],
 670 [
 671   case $enable_tls in
 672     yes | no) ;;
 673     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 674 Valid choices are 'yes' and 'no'.]) ;;
 675   esac
 676 ], [enable_tls=''])
 677
 678 AC_ARG_ENABLE(objc-gc,
 679 [  --enable-objc-gc       enable the use of Boehm's garbage collector with
 680                           the GNU Objective-C runtime],
 681 if test x$enable_objc_gc = xno; then
 682         objc_boehm_gc=''
 683 else
 684         objc_boehm_gc=1
 685 fi,
 686 objc_boehm_gc='')
 687
 688 AC_ARG_WITH(dwarf2,
 689 [  --with-dwarf2           force the default debug format to be DWARF 2],
 690 dwarf2="$with_dwarf2",
 691 dwarf2=no)
 692
 693 AC_ARG_ENABLE(shared,
 694 [  --disable-shared        don't provide a shared libgcc],
 695 [
 696   case $enable_shared in
 697   yes | no) ;;
 698   *)
 699     enable_shared=no
 700     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 701     for pkg in $enableval; do
 702       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 703         enable_shared=yes
 704       fi
 705     done
 706     IFS="$ac_save_ifs"
 707     ;;
 708   esac
 709 ], [enable_shared=yes])
 710 AC_SUBST(enable_shared)
 711
 712 AC_ARG_WITH(build-sysroot,
 713   [  --with-build-sysroot=sysroot
 714                           use sysroot as the system root during the build])
 715
 716 AC_ARG_WITH(sysroot,
 717 [  --with-sysroot[=DIR] Search for usr/lib, usr/include, et al, within DIR.],
 718 [
 719  case ${with_sysroot} in
 720  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 721  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 722  esac
 723
 724  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 725  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 726
 727  if test "x$prefix" = xNONE; then
 728   test_prefix=/usr/local
 729  else
 730   test_prefix=$prefix
 731  fi
 732  if test "x$exec_prefix" = xNONE; then
 733   test_exec_prefix=$test_prefix
 734  else
 735   test_exec_prefix=$exec_prefix
 736  fi
 737  case ${TARGET_SYSTEM_ROOT} in
 738  "${test_prefix}"|"${test_prefix}/"*|\
 739  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 740  '${prefix}'|'${prefix}/'*|\
 741  '${exec_prefix}'|'${exec_prefix}/'*)
 742    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 743    TARGET_SYSTEM_ROOT_DEFINE="$t"
 744    ;;
 745  esac
 746 ], [
 747  TARGET_SYSTEM_ROOT=
 748  TARGET_SYSTEM_ROOT_DEFINE=
 749  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 750 ])
 751 AC_SUBST(TARGET_SYSTEM_ROOT)
 752 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 753 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 754
 755 AC_ARG_WITH(specs,
 756   [AS_HELP_STRING([--with-specs=SPECS],
 757                   [add SPECS to driver command-line processing])],
 758   [CONFIGURE_SPECS=$withval],
 759   [CONFIGURE_SPECS=]
 760 )
 761 AC_SUBST(CONFIGURE_SPECS)
 762
 763 ACX_PKGVERSION([GCC])
 764 ACX_BUGURL([http://gcc.gnu.org/bugs.html])
 765
 766 # Sanity check enable_languages in case someone does not run the toplevel
 767 # configure # script.
 768 AC_ARG_ENABLE(languages,
 769 [  --enable-languages=LIST specify which front-ends to build],
 770 [case ,${enable_languages}, in
 771        ,,|,yes,)
 772                 # go safe -- we cannot be much sure without the toplevel
 773                 # configure's
 774                 # analysis of which target libs are present and usable
 775                 enable_languages=c
 776                 ;;
 777          *,all,*)
 778                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 779                 ;;
 780         *,c,*)
 781                 ;;
 782         *)
 783                 enable_languages=c,${enable_languages}
 784                 ;;
 785 esac],
 786 [enable_languages=c])
 787
 788 AC_ARG_WITH(multilib-list,
 789 [  --with-multilib-list    Select multilibs (SH only)],
 790 :,
 791 with_multilib_list=default)
 792
 793 # -------------------------
 794 # Checks for other programs
 795 # -------------------------
 796
 797 AC_PROG_MAKE_SET
 798
 799 # Find some useful tools
 800 AC_PROG_AWK
 801 # We need awk to create options.c and options.h.
 802 # Bail out if it's missing.
 803 case ${AWK} in
 804   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
 805 esac
 806
 807 gcc_AC_PROG_LN_S
 808 ACX_PROG_LN($LN_S)
 809 AC_PROG_RANLIB
 810 case "${host}" in
 811 *-*-darwin*)
 812   # By default, the Darwin ranlib will not treat common symbols as
 813   # definitions when  building the archive table of contents.  Other
 814   # ranlibs do that; pass an option to the Darwin ranlib that makes
 815   # it behave similarly.
 816   ranlib_flags="-c"
 817   ;;
 818 *)
 819   ranlib_flags=""
 820 esac
 821 AC_SUBST(ranlib_flags)
 822
 823 gcc_AC_PROG_INSTALL
 824
 825 # See if cmp has --ignore-initial.
 826 gcc_AC_PROG_CMP_IGNORE_INITIAL
 827
 828 # See if we have the mktemp command.
 829 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
 830
 831 # See if makeinfo has been installed and is modern enough
 832 # that we can use it.
 833 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
 834   [GNU texinfo.* \([0-9][0-9.]*\)],
 835   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
 836 if test $gcc_cv_prog_makeinfo_modern = no; then
 837   AC_MSG_WARN([
 838 *** Makeinfo is missing or too old.
 839 *** Info documentation will not be built.])
 840   BUILD_INFO=
 841 else
 842   BUILD_INFO=info
 843 fi
 844 AC_SUBST(BUILD_INFO)
 845
 846 # Is pod2man recent enough to regenerate manpages?
 847 AC_MSG_CHECKING([for recent Pod::Man])
 848 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
 849   AC_MSG_RESULT(yes)
 850   GENERATED_MANPAGES=generated-manpages
 851 else
 852   AC_MSG_RESULT(no)
 853   GENERATED_MANPAGES=
 854 fi
 855 AC_SUBST(GENERATED_MANPAGES)
 856
 857 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
 858
 859 # How about lex?
 860 dnl Don't use AC_PROG_LEX; we insist on flex.
 861 dnl LEXLIB is not useful in gcc.
 862 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
 863
 864 # Bison?
 865 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
 866
 867 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
 868 # check for build == host before using them.
 869
 870 # NM
 871 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
 872   && test -d ../binutils ; then
 873   NM='${objdir}/../binutils/nm-new'
 874 else
 875   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
 876 fi
 877
 878 # AR
 879 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
 880   && test -d ../binutils ; then
 881   AR='${objdir}/../binutils/ar'
 882 else
 883   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
 884 fi
 885
 886
 887 # --------------------
 888 # Checks for C headers
 889 # --------------------
 890
 891 # Need to reject headers which give warnings, so that the -Werror bootstrap
 892 # works later. *sigh*  This needs to come before all header checks.
 893 AC_PROG_CPP_WERROR
 894
 895 AC_HEADER_STDC
 896 AC_HEADER_TIME
 897 ACX_HEADER_STRING
 898 AC_HEADER_SYS_WAIT
 899 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
 900                  fcntl.h unistd.h sys/file.h sys/time.h sys/mman.h \
 901                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
 902                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
 903
 904 # Check for thread headers.
 905 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
 906 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
 907
 908 # These tests can't be done till we know if we have limits.h.
 909 gcc_AC_C_CHAR_BIT
 910 AC_C_BIGENDIAN
 911
 912 # ----------------------
 913 # Checks for C++ headers
 914 # ----------------------
 915
 916 dnl Autoconf will give an error in the configure script if there is no
 917 dnl C++ preprocessor.  Hack to prevent that.
 918 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
 919 AC_PROG_CXXCPP
 920 m4_popdef([AC_MSG_ERROR])[]dnl
 921
 922 AC_LANG_PUSH(C++)
 923
 924 AC_CHECK_HEADERS(unordered_map)
 925 AC_CHECK_HEADERS(tr1/unordered_map)
 926 AC_CHECK_HEADERS(ext/hash_map)
 927
 928 AC_LANG_POP(C++)
 929
 930 # --------
 931 # UNSORTED
 932 # --------
 933
 934
 935 # These libraries may be used by collect2.
 936 # We may need a special search path to get them linked.
 937 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
 938 [save_LIBS="$LIBS"
 939 for libs in '' -lld -lmld \
 940                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
 941                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
 942 do
 943         LIBS="$libs"
 944         AC_TRY_LINK_FUNC(ldopen,
 945                 [gcc_cv_collect2_libs="$libs"; break])
 946 done
 947 LIBS="$save_LIBS"
 948 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
 949 case $gcc_cv_collect2_libs in
 950         "none required")        ;;
 951         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
 952 esac
 953 AC_SUBST(COLLECT2_LIBS)
 954
 955 # When building Ada code on Alpha, we need exc_resume which is usually in
 956 # -lexc.  So test for it.
 957 save_LIBS="$LIBS"
 958 LIBS=
 959 AC_SEARCH_LIBS(exc_resume, exc)
 960 GNAT_LIBEXC="$LIBS"
 961 LIBS="$save_LIBS"
 962 AC_SUBST(GNAT_LIBEXC)
 963
 964 # Some systems put ldexp and frexp in libm instead of libc; assume
 965 # they're both in the same place.  jcf-dump needs them.
 966 save_LIBS="$LIBS"
 967 LIBS=
 968 AC_SEARCH_LIBS(ldexp, m)
 969 LDEXP_LIB="$LIBS"
 970 LIBS="$save_LIBS"
 971 AC_SUBST(LDEXP_LIB)
 972
 973 # Use <inttypes.h> only if it exists,
 974 # doesn't clash with <sys/types.h>, and declares intmax_t.
 975 AC_MSG_CHECKING(for inttypes.h)
 976 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
 977 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 978 [[#include <sys/types.h>
 979 #include <inttypes.h>]],
 980   [[intmax_t i = -1;]])],
 981   [gcc_cv_header_inttypes_h=yes],
 982   [gcc_cv_header_inttypes_h=no])])
 983 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
 984 if test $gcc_cv_header_inttypes_h = yes; then
 985   AC_DEFINE(HAVE_INTTYPES_H, 1,
 986         [Define if you have a working <inttypes.h> header file.])
 987 fi
 988
 989 dnl Disabled until we have a complete test for buggy enum bitfields.
 990 dnl gcc_AC_C_ENUM_BF_UNSIGNED
 991
 992 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
 993   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
 994   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
 995   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
 996   putchar_unlocked putc_unlocked)
 997 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
 998         sysconf strsignal getrusage nl_langinfo \
 999         gettimeofday mbstowcs wcswidth mmap setlocale \
1000         gcc_UNLOCKED_FUNCS)
1001
1002 if test x$ac_cv_func_mbstowcs = xyes; then
1003   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1004 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1005 int main()
1006 {
1007   mbstowcs(0, "", 0);
1008   return 0;
1009 }]])],
1010     [gcc_cv_func_mbstowcs_works=yes],
1011     [gcc_cv_func_mbstowcs_works=no],
1012     [gcc_cv_func_mbstowcs_works=yes])])
1013   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1014     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1015   [Define this macro if mbstowcs does not crash when its
1016    first argument is NULL.])
1017   fi
1018 fi
1019
1020 AC_CHECK_TYPE(ssize_t, int)
1021 AC_CHECK_TYPE(caddr_t, char *)
1022
1023 gcc_AC_FUNC_MMAP_BLACKLIST
1024
1025 case "${host}" in
1026 *-*-*vms*)
1027   # Under VMS, vfork works very differently than on Unix. The standard test
1028   # won't work, and it isn't easily adaptable. It makes more sense to
1029   # just force it.
1030   ac_cv_func_vfork_works=yes
1031   ;;
1032 esac
1033 AC_FUNC_FORK
1034
1035 AM_ICONV
1036 # Until we have in-tree GNU iconv:
1037 LIBICONV_DEP=
1038 AC_SUBST(LIBICONV_DEP)
1039
1040 AM_LC_MESSAGES
1041
1042 AM_LANGINFO_CODESET
1043
1044 # We will need to find libiberty.h and ansidecl.h
1045 saved_CFLAGS="$CFLAGS"
1046 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
1047 gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
1048         strsignal strstr strverscmp \
1049         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1050         free basename getopt clock getpagesize gcc_UNLOCKED_FUNCS, , ,[
1051 #include "ansidecl.h"
1052 #include "system.h"])
1053
1054 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1055 #include "ansidecl.h"
1056 #include "system.h"
1057 #ifdef HAVE_SYS_RESOURCE_H
1058 #include <sys/resource.h>
1059 #endif
1060 ])
1061
1062 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1063 #include "ansidecl.h"
1064 #include "system.h"
1065 #ifdef HAVE_SYS_RESOURCE_H
1066 #include <sys/resource.h>
1067 #endif
1068 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1069 [Define to `long' if <sys/resource.h> doesn't define.])])
1070
1071 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1072 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1073 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1074 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1075 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1076 #include "ansidecl.h"
1077 #include "system.h"
1078 #ifdef HAVE_LDFCN_H
1079 #undef FREAD
1080 #undef FWRITE
1081 #include <ldfcn.h>
1082 #endif
1083 ])
1084
1085 gcc_AC_CHECK_DECLS(times, , ,[
1086 #include "ansidecl.h"
1087 #include "system.h"
1088 #ifdef HAVE_SYS_TIMES_H
1089 #include <sys/times.h>
1090 #endif
1091 ])
1092
1093 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1094 #include "ansidecl.h"
1095 #include "system.h"
1096 #include <signal.h>
1097 ])
1098
1099 # More time-related stuff.
1100 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1101 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1102 #include "ansidecl.h"
1103 #include "system.h"
1104 #ifdef HAVE_SYS_TIMES_H
1105 #include <sys/times.h>
1106 #endif
1107 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1108 if test $ac_cv_struct_tms = yes; then
1109   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1110   [Define if <sys/times.h> defines struct tms.])
1111 fi
1112
1113 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1114 # revisit after autoconf 2.50.
1115 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1116 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1117 #include "ansidecl.h"
1118 #include "system.h"
1119 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1120 if test $gcc_cv_type_clock_t = yes; then
1121   AC_DEFINE(HAVE_CLOCK_T, 1,
1122   [Define if <time.h> defines clock_t.])
1123 fi
1124
1125 # Restore CFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1126 CFLAGS="$saved_CFLAGS"
1127
1128 gcc_AC_INITFINI_ARRAY
1129
1130 # mkdir takes a single argument on some systems.
1131 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1132
1133 # File extensions
1134 manext='.1'
1135 objext='.o'
1136 AC_SUBST(manext)
1137 AC_SUBST(objext)
1138
1139 # With Setjmp/Longjmp based exception handling.
1140 AC_ARG_ENABLE(sjlj-exceptions,
1141 [  --enable-sjlj-exceptions
1142                           arrange to use setjmp/longjmp exception handling],
1143 [case $target in
1144   *-*-hpux10*)
1145     if test $enableval != yes; then
1146       AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1147       enableval=yes
1148     fi
1149     ;;
1150 esac
1151 force_sjlj_exceptions=yes],
1152 [case $target in
1153   *-*-hpux10*)
1154     force_sjlj_exceptions=yes
1155     enableval=yes
1156     ;;
1157   *)
1158     force_sjlj_exceptions=no
1159     ;;
1160 esac])
1161 if test $force_sjlj_exceptions = yes; then
1162   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1163   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1164     [Define 0/1 to force the choice for exception handling model.])
1165 fi
1166
1167 # For platforms with the unwind ABI which includes an unwind library,
1168 # libunwind, we can choose to use the system libunwind.
1169 # config.gcc also contains tests of with_system_libunwind.
1170 GCC_CHECK_UNWIND_GETIPINFO
1171
1172 # --------------------------------------------------------
1173 # Build, host, and target specific configuration fragments
1174 # --------------------------------------------------------
1175
1176 # Collect build-machine-specific information.
1177 . ${srcdir}/config.build
1178
1179 # Collect host-machine-specific information.
1180 . ${srcdir}/config.host
1181
1182 target_gtfiles=
1183
1184 # Collect target-machine-specific information.
1185 . ${srcdir}/config.gcc
1186
1187 extra_objs="${host_extra_objs} ${extra_objs}"
1188 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1189
1190 # Default the target-machine variables that were not explicitly set.
1191 if test x"$tm_file" = x
1192 then tm_file=$cpu_type/$cpu_type.h; fi
1193
1194 if test x"$extra_headers" = x
1195 then extra_headers=; fi
1196
1197 if test x$md_file = x
1198 then md_file=$cpu_type/$cpu_type.md; fi
1199
1200 if test x$out_file = x
1201 then out_file=$cpu_type/$cpu_type.c; fi
1202
1203 if test x"$tmake_file" = x
1204 then tmake_file=$cpu_type/t-$cpu_type
1205 fi
1206
1207 if test x"$dwarf2" = xyes
1208 then tm_file="$tm_file tm-dwarf2.h"
1209 fi
1210
1211 # Say what files are being used for the output code and MD file.
1212 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1213 echo "Using \`$srcdir/config/$md_file' as machine description file."
1214
1215 # If any of the xm_file variables contain nonexistent files, warn
1216 # about them and drop them.
1217
1218 bx=
1219 for x in $build_xm_file; do
1220   if    test -f $srcdir/config/$x
1221   then      bx="$bx $x"
1222   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1223   fi
1224 done
1225 build_xm_file="$bx"
1226
1227 hx=
1228 for x in $host_xm_file; do
1229   if    test -f $srcdir/config/$x
1230   then      hx="$hx $x"
1231   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1232   fi
1233 done
1234 host_xm_file="$hx"
1235
1236 tx=
1237 for x in $xm_file; do
1238   if    test -f $srcdir/config/$x
1239   then      tx="$tx $x"
1240   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1241   fi
1242 done
1243 xm_file="$tx"
1244
1245 count=a
1246 for f in $tm_file; do
1247         count=${count}x
1248 done
1249 if test $count = ax; then
1250         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1251 else
1252         echo "Using the following target machine macro files:"
1253         for f in $tm_file; do
1254                 echo "  $srcdir/config/$f"
1255         done
1256 fi
1257
1258 if test x$need_64bit_hwint = xyes; then
1259         AC_DEFINE(NEED_64BIT_HOST_WIDE_INT, 1,
1260 [Define to 1 if HOST_WIDE_INT must be 64 bits wide (see hwint.h).])
1261 fi
1262
1263 if test x$use_long_long_for_widest_fast_int = xyes; then
1264         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1265 [Define to 1 if the 'long long' (or '__int64') is wider than 'long' but still
1266 efficiently supported by the host hardware.])
1267 fi
1268
1269 count=a
1270 for f in $host_xm_file; do
1271         count=${count}x
1272 done
1273 if test $count = a; then
1274         :
1275 elif test $count = ax; then
1276         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1277 else
1278         echo "Using the following host machine macro files:"
1279         for f in $host_xm_file; do
1280                 echo "  $srcdir/config/$f"
1281         done
1282 fi
1283 echo "Using ${out_host_hook_obj} for host machine hooks."
1284
1285 if test "$host_xm_file" != "$build_xm_file"; then
1286         count=a
1287         for f in $build_xm_file; do
1288                 count=${count}x
1289         done
1290         if test $count = a; then
1291                 :
1292         elif test $count = ax; then
1293                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1294         else
1295                 echo "Using the following build machine macro files:"
1296                 for f in $build_xm_file; do
1297                         echo "  $srcdir/config/$f"
1298                 done
1299         fi
1300 fi
1301
1302 case ${host} in
1303   powerpc*-*-darwin*)
1304     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1305       gcc_cv_mcontext_underscores,
1306       AC_COMPILE_IFELSE([
1307 #include <sys/cdefs.h>
1308 #include <sys/signal.h>
1309 #include <ucontext.h>
1310 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1311 ],
1312         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1313       if test $gcc_cv_mcontext_underscores = yes; then
1314         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1315           [mcontext_t fields start with __])
1316       fi
1317     ;;
1318 esac
1319
1320 # ---------
1321 # Threading
1322 # ---------
1323
1324 # Check if a valid thread package
1325 case ${enable_threads} in
1326   "" | no)
1327     # No threads
1328     target_thread_file='single'
1329     ;;
1330   yes)
1331     # default
1332     target_thread_file='single'
1333     ;;
1334   aix | dce | gnat | irix | posix | posix95 | rtems | \
1335   single | solaris | vxworks | win32 | mipssde)
1336     target_thread_file=${enable_threads}
1337     ;;
1338   *)
1339     echo "${enable_threads} is an unknown thread package" 1>&2
1340     exit 1
1341     ;;
1342 esac
1343
1344 if test x${thread_file} = x; then
1345   # No thread file set by target-specific clauses in config.gcc,
1346   # so use file chosen by default logic above
1347   thread_file=${target_thread_file}
1348 fi
1349
1350 # Make gthr-default.h if we have a thread file.
1351 gthread_flags=
1352 if test $thread_file != single; then
1353   echo "#include \"gthr-${thread_file}.h\"" > gthr-default.h-t
1354   if diff gthr-default.h-t gthr-default.h 2>/dev/null; then
1355     rm -f gthr-default.h-t
1356   else
1357     mv -f gthr-default.h-t gthr-default.h
1358   fi
1359   gthread_flags=-DHAVE_GTHR_DEFAULT
1360 fi
1361 AC_SUBST(gthread_flags)
1362
1363 # --------
1364 # UNSORTED
1365 # --------
1366
1367 use_cxa_atexit=no
1368 if test x$enable___cxa_atexit = xyes || \
1369    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1370   if test x$host = x$target; then
1371     case $host in
1372       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1373       # keyed to flag_use_cxa_atexit
1374       *-*-mingw32*)
1375         use_cxa_atexit=yes
1376         ;;
1377       *)
1378         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1379           [echo "__cxa_atexit can't be enabled on this target"])
1380         ;;
1381     esac
1382   else
1383     # We can't check for __cxa_atexit when building a cross, so assume
1384     # it is available
1385     use_cxa_atexit=yes
1386   fi
1387   if test x$use_cxa_atexit = xyes; then
1388     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1389       [Define if you want to use __cxa_atexit, rather than atexit, to
1390       register C++ destructors for local statics and global objects.
1391       This is essential for fully standards-compliant handling of
1392       destructors, but requires __cxa_atexit in libc.])
1393   fi
1394 fi
1395
1396 # Look for a file containing extra machine modes.
1397 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1398   extra_modes_file='$(srcdir)'/config/${extra_modes}
1399   AC_SUBST(extra_modes_file)
1400   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1401   [Define to the name of a file containing a list of extra machine modes
1402    for this architecture.])
1403 fi
1404
1405 # Convert extra_options into a form suitable for Makefile use.
1406 extra_opt_files=
1407 all_opt_files=
1408 for f in $extra_options; do
1409   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1410   all_opt_files="$all_opt_files $srcdir/config/$f"
1411 done
1412 AC_SUBST(extra_opt_files)
1413
1414 # auto-host.h is the file containing items generated by autoconf and is
1415 # the first file included by config.h.
1416 # If host=build, it is correct to have bconfig include auto-host.h
1417 # as well.  If host!=build, we are in error and need to do more
1418 # work to find out the build config parameters.
1419 if test x$host = x$build
1420 then
1421         build_auto=auto-host.h
1422 else
1423         # We create a subdir, then run autoconf in the subdir.
1424         # To prevent recursion we set host and build for the new
1425         # invocation of configure to the build for this invocation
1426         # of configure.
1427         tempdir=build.$$
1428         rm -rf $tempdir
1429         mkdir $tempdir
1430         cd $tempdir
1431         case ${srcdir} in
1432         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1433         *) realsrcdir=../${srcdir};;
1434         esac
1435         saved_CFLAGS="${CFLAGS}"
1436         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1437         LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1438         ${realsrcdir}/configure \
1439                 --enable-languages=${enable_languages-all} \
1440                 --target=$target_alias --host=$build_alias --build=$build_alias
1441         CFLAGS="${saved_CFLAGS}"
1442
1443         # We just finished tests for the build machine, so rename
1444         # the file auto-build.h in the gcc directory.
1445         mv auto-host.h ../auto-build.h
1446         cd ..
1447         rm -rf $tempdir
1448         build_auto=auto-build.h
1449 fi
1450 AC_SUBST(build_subdir)
1451
1452 tm_file="${tm_file} defaults.h"
1453 tm_p_file="${tm_p_file} tm-preds.h"
1454 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1455 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1456 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1457 # put this back in temporarily.
1458 xm_file="auto-host.h ansidecl.h ${xm_file}"
1459
1460 # --------
1461 # UNSORTED
1462 # --------
1463
1464 changequote(,)dnl
1465 # Compile in configure arguments.
1466 if test -f configargs.h ; then
1467         # Being re-configured.
1468         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1469         gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1470 else
1471         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1472 fi
1473
1474 # Double all backslashes and backslash all quotes to turn
1475 # gcc_config_arguments into a C string.
1476 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1477 $gcc_config_arguments
1478 EOF
1479 gcc_config_arguments_str=`cat conftest.out`
1480 rm -f conftest.out
1481
1482 cat > configargs.h <<EOF
1483 /* Generated automatically. */
1484 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1485 static const char thread_model[] = "$thread_file";
1486
1487 static const struct {
1488   const char *name, *value;
1489 } configure_default_options[] = $configure_default_options;
1490 EOF
1491 changequote([,])dnl
1492
1493 changequote(,)dnl
1494 gcc_BASEVER=`cat $srcdir/BASE-VER`
1495 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1496 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1497 if test -f $srcdir/REVISION ; then
1498         gcc_REVISION=`cat $srcdir/REVISION`
1499 else
1500         gcc_REVISION=""
1501 fi
1502 cat > plugin-version.h <<EOF
1503 #include "configargs.h"
1504
1505 static char basever[] = "$gcc_BASEVER";
1506 static char datestamp[] = "$gcc_DATESTAMP";
1507 static char devphase[] = "$gcc_DEVPHASE";
1508 static char revision[] = "$gcc_REVISION";
1509
1510 /* FIXME plugins: We should make the version information more precise.
1511    One way to do is to add a checksum. */
1512
1513 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1514                                                 devphase, revision,
1515                                                 configuration_arguments};
1516 EOF
1517 changequote([,])dnl
1518
1519 # Internationalization
1520 ZW_GNU_GETTEXT_SISTER_DIR
1521
1522 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1523 # -liconv on the link line twice.
1524 case "$LIBINTL" in *$LIBICONV*)
1525         LIBICONV= ;;
1526 esac
1527
1528 AC_ARG_ENABLE(secureplt,
1529 [  --enable-secureplt      enable -msecure-plt by default for PowerPC],
1530 [], [])
1531
1532 AC_ARG_ENABLE(leading-mingw64-underscores,
1533   AS_HELP_STRING([--enable-leading-mingw64-underscores],
1534                  [Enable leading underscores on 64 bit mingw targets]),
1535   [],[])
1536 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1537   [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1538     [Define if we should use leading underscore on 64 bit mingw targets])])
1539
1540 AC_ARG_ENABLE(cld,
1541 [  --enable-cld            enable -mcld by default for 32bit x86], [],
1542 [enable_cld=no])
1543
1544 AC_ARG_ENABLE(frame-pointer,
1545 [  --enable-frame-pointer  enable -fno-omit-frame-pointer by default for 32bit x86], [],
1546 [
1547 case $target_os in
1548 linux* | darwin[[8912]]*)
1549   # Enable -fomit-frame-pointer by default for Linux and Darwin with
1550   # DWARF2.
1551   enable_frame_pointer=no
1552   ;;
1553 *)
1554   enable_frame_pointer=yes
1555   ;;
1556 esac
1557 ])
1558
1559 # Windows32 Registry support for specifying GCC installation paths.
1560 AC_ARG_ENABLE(win32-registry,
1561 [  --disable-win32-registry
1562                           disable lookup of installation paths in the
1563                           Registry on Windows hosts
1564   --enable-win32-registry enable registry lookup (default)
1565   --enable-win32-registry=KEY
1566                           use KEY instead of GCC version as the last portion
1567                           of the registry key],,)
1568
1569 case $host_os in
1570   win32 | pe | cygwin* | mingw32* | uwin*)
1571     if test "x$enable_win32_registry" != xno; then
1572       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1573     fi
1574
1575     if test "x$enable_win32_registry" != xno; then
1576       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1577   [Define to 1 if installation paths should be looked up in the Windows
1578    Registry. Ignored on non-Windows hosts.])
1579
1580       if test "x$enable_win32_registry" != xyes \
1581          && test "x$enable_win32_registry" != x; then
1582         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1583   [Define to be the last component of the Windows registry key under which
1584    to look for installation paths.  The full key used will be
1585    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1586    The default is the GCC version number.])
1587       fi
1588     fi
1589   ;;
1590 esac
1591
1592 # Get an absolute path to the GCC top-level source directory
1593 holddir=`${PWDCMD-pwd}`
1594 cd $srcdir
1595 topdir=`${PWDCMD-pwd}`
1596 cd $holddir
1597
1598 # Conditionalize the makefile for this host machine.
1599 xmake_file=
1600 for f in ${host_xmake_file}
1601 do
1602         if test -f ${srcdir}/config/$f
1603         then
1604                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1605         fi
1606 done
1607
1608 # Conditionalize the makefile for this target machine.
1609 tmake_file_=
1610 for f in ${tmake_file}
1611 do
1612         if test -f ${srcdir}/config/$f
1613         then
1614                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1615         fi
1616 done
1617 tmake_file="${tmake_file_}"
1618
1619 out_object_file=`basename $out_file .c`.o
1620
1621 tm_file_list="options.h"
1622 tm_include_list="options.h insn-constants.h"
1623 for f in $tm_file; do
1624   case $f in
1625     ./* )
1626        f=`echo $f | sed 's/^..//'`
1627        tm_file_list="${tm_file_list} $f"
1628        tm_include_list="${tm_include_list} $f"
1629        ;;
1630     defaults.h )
1631        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1632        tm_include_list="${tm_include_list} $f"
1633        ;;
1634     * )
1635        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1636        tm_include_list="${tm_include_list} config/$f"
1637        ;;
1638   esac
1639 done
1640
1641 tm_p_file_list=
1642 tm_p_include_list=
1643 for f in $tm_p_file; do
1644   case $f in
1645     tm-preds.h )
1646        tm_p_file_list="${tm_p_file_list} $f"
1647        tm_p_include_list="${tm_p_include_list} $f"
1648        ;;
1649     * )
1650        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1651        tm_p_include_list="${tm_p_include_list} config/$f"
1652   esac
1653 done
1654
1655 xm_file_list=
1656 xm_include_list=
1657 for f in $xm_file; do
1658   case $f in
1659     ansidecl.h )
1660        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1661        xm_include_list="${xm_include_list} $f"
1662        ;;
1663     auto-host.h )
1664        xm_file_list="${xm_file_list} $f"
1665        xm_include_list="${xm_include_list} $f"
1666        ;;
1667     * )
1668        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1669        xm_include_list="${xm_include_list} config/$f"
1670        ;;
1671   esac
1672 done
1673
1674 host_xm_file_list=
1675 host_xm_include_list=
1676 for f in $host_xm_file; do
1677   case $f in
1678     ansidecl.h )
1679        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1680        host_xm_include_list="${host_xm_include_list} $f"
1681        ;;
1682     auto-host.h )
1683        host_xm_file_list="${host_xm_file_list} $f"
1684        host_xm_include_list="${host_xm_include_list} $f"
1685        ;;
1686     * )
1687        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1688        host_xm_include_list="${host_xm_include_list} config/$f"
1689        ;;
1690   esac
1691 done
1692
1693 build_xm_file_list=
1694 for f in $build_xm_file; do
1695   case $f in
1696     ansidecl.h )
1697        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1698        build_xm_include_list="${build_xm_include_list} $f"
1699        ;;
1700     auto-build.h | auto-host.h )
1701        build_xm_file_list="${build_xm_file_list} $f"
1702        build_xm_include_list="${build_xm_include_list} $f"
1703        ;;
1704     * )
1705        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
1706        build_xm_include_list="${build_xm_include_list} config/$f"
1707        ;;
1708   esac
1709 done
1710
1711 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
1712 # cross-compiler which does not use the native headers and libraries.
1713 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
1714 CROSS=                                          AC_SUBST(CROSS)
1715 ALL=all.internal                                AC_SUBST(ALL)
1716 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
1717
1718 if test "x$with_build_sysroot" != x; then
1719   build_system_header_dir=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
1720 else
1721   # This value is used, even on a native system, because
1722   # CROSS_SYSTEM_HEADER_DIR is just
1723   # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
1724   build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
1725 fi
1726
1727 if test x$host != x$target
1728 then
1729         CROSS="-DCROSS_DIRECTORY_STRUCTURE"
1730         ALL=all.cross
1731         SYSTEM_HEADER_DIR=$build_system_header_dir
1732         case "$host","$target" in
1733         # Darwin crosses can use the host system's libraries and headers,
1734         # because of the fat library support.  Of course, it must be the
1735         # same version of Darwin on both sides.  Allow the user to
1736         # just say --target=foo-darwin without a version number to mean
1737         # "the version on this system".
1738             *-*-darwin*,*-*-darwin*)
1739                 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
1740                 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
1741                 if test $hostos = $targetos -o $targetos = darwin ; then
1742                     CROSS=
1743                     SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
1744                     with_headers=yes
1745                 fi
1746                 ;;
1747
1748             i?86-*-*,x86_64-*-* \
1749             | powerpc*-*-*,powerpc64*-*-*)
1750                 CROSS="$CROSS -DNATIVE_CROSS" ;;
1751         esac
1752
1753         case $target in
1754                 *-*-mingw*)
1755                         if test "x$with_headers" = x; then
1756                                 with_headers=yes
1757                         fi
1758                         ;;
1759                 *)
1760                         ;;
1761         esac
1762 elif test "x$TARGET_SYSTEM_ROOT" != x; then
1763         SYSTEM_HEADER_DIR=$build_system_header_dir
1764 fi
1765
1766 # If this is a cross-compiler that does not
1767 # have its own set of headers then define
1768 # inhibit_libc
1769
1770 # If this is using newlib, without having the headers available now,
1771 # then define inhibit_libc in LIBGCC2_CFLAGS.
1772 # This prevents libgcc2 from containing any code which requires libc
1773 # support.
1774 : ${inhibit_libc=false}
1775 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
1776        test x$with_newlib = xyes ; } &&
1777      { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
1778        inhibit_libc=true
1779 fi
1780 AC_SUBST(inhibit_libc)
1781
1782 # When building gcc with a cross-compiler, we need to adjust things so
1783 # that the generator programs are still built with the native compiler.
1784 # Also, we cannot run fixincludes.
1785
1786 # These are the normal (build=host) settings:
1787 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
1788 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
1789 BUILD_LDFLAGS='$(LDFLAGS)'      AC_SUBST(BUILD_LDFLAGS)
1790 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
1791
1792 # And these apply if build != host, or we are generating coverage data
1793 if test x$build != x$host || test "x$coverage_flags" != x
1794 then
1795     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
1796     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
1797 fi
1798
1799 # Expand extra_headers to include complete path.
1800 # This substitutes for lots of t-* files.
1801 extra_headers_list=
1802 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
1803 for file in ${extra_headers} ; do
1804   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
1805 done
1806
1807 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
1808 if test x"$use_gcc_tgmath" = xyes
1809 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
1810 fi
1811
1812 # Define collect2 in Makefile.
1813 case $host_can_use_collect2 in
1814   no) collect2= ;;
1815   *) collect2='collect2$(exeext)' ;;
1816 esac
1817 AC_SUBST([collect2])
1818
1819 # Add a definition of USE_COLLECT2 if system wants one.
1820 case $use_collect2 in
1821   no) use_collect2= ;;
1822   "") ;;
1823   *)
1824     host_xm_defines="${host_xm_defines} USE_COLLECT2"
1825     xm_defines="${xm_defines} USE_COLLECT2"
1826     case $host_can_use_collect2 in
1827       no)
1828         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
1829         ;;
1830     esac
1831     ;;
1832 esac
1833
1834 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
1835 [Define to the name of the LTO plugin DSO that must be
1836   passed to the linker's -plugin=LIB option.])
1837
1838 # ---------------------------
1839 # Assembler & linker features
1840 # ---------------------------
1841
1842 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
1843 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
1844 # However when ld-new is first executed from the build tree, libtool will
1845 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
1846 # to the build tree.  While doing this we need to use the previous-stage
1847 # linker, or we have an infinite loop.  The presence of a shell script as
1848 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
1849 # the gcc/collect-ld script.  So we need to know how libtool works, or
1850 # exec-tool will fail.
1851
1852 m4_defun([_LT_CONFIG_COMMANDS], [])
1853 AC_PROG_LIBTOOL
1854 AC_SUBST(objdir)
1855 AC_SUBST(enable_fast_install)
1856
1857 # Identify the assembler which will work hand-in-glove with the newly
1858 # built GCC, so that we can examine its features.  This is the assembler
1859 # which will be driven by the driver program.
1860 #
1861 # If build != host, and we aren't building gas in-tree, we identify a
1862 # build->target assembler and hope that it will have the same features
1863 # as the host->target assembler we'll be using.
1864 gcc_cv_gas_major_version=
1865 gcc_cv_gas_minor_version=
1866 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
1867
1868 m4_pattern_allow([AS_FOR_TARGET])dnl
1869 AS_VAR_SET_IF(gcc_cv_as,, [
1870 if test -x "$DEFAULT_ASSEMBLER"; then
1871         gcc_cv_as="$DEFAULT_ASSEMBLER"
1872 elif test -f $gcc_cv_as_gas_srcdir/configure.in \
1873      && test -f ../gas/Makefile \
1874      && test x$build = x$host; then
1875         gcc_cv_as=../gas/as-new$build_exeext
1876 elif test -x as$build_exeext; then
1877         # Build using assembler in the current directory.
1878         gcc_cv_as=./as$build_exeext
1879 elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
1880         gcc_cv_as="$AS_FOR_TARGET"
1881 else
1882         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
1883 fi])
1884
1885 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
1886 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
1887 case "$ORIGINAL_AS_FOR_TARGET" in
1888   ./as | ./as$build_exeext) ;;
1889   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
1890 esac
1891
1892 AC_MSG_CHECKING(what assembler to use)
1893 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
1894   # Single tree build which includes gas.  We want to prefer it
1895   # over whatever linker top-level may have detected, since
1896   # we'll use what we're building after installation anyway.
1897   AC_MSG_RESULT(newly built gas)
1898   in_tree_gas=yes
1899   _gcc_COMPUTE_GAS_VERSION
1900   in_tree_gas_is_elf=no
1901   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
1902      || (grep 'obj_format = multi' ../gas/Makefile \
1903          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
1904   then
1905     in_tree_gas_is_elf=yes
1906   fi
1907 else
1908   AC_MSG_RESULT($gcc_cv_as)
1909   in_tree_gas=no
1910 fi
1911
1912 # Identify the linker which will work hand-in-glove with the newly
1913 # built GCC, so that we can examine its features.  This is the linker
1914 # which will be driven by the driver program.
1915 #
1916 # If build != host, and we aren't building gas in-tree, we identify a
1917 # build->target linker and hope that it will have the same features
1918 # as the host->target linker we'll be using.
1919 gcc_cv_gld_major_version=
1920 gcc_cv_gld_minor_version=
1921 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
1922 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
1923
1924 AS_VAR_SET_IF(gcc_cv_ld,, [
1925 if test -x "$DEFAULT_LINKER"; then
1926         gcc_cv_ld="$DEFAULT_LINKER"
1927 elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
1928      && test -f ../ld/Makefile \
1929      && test x$build = x$host; then
1930         gcc_cv_ld=../ld/ld-new$build_exeext
1931 elif test -x collect-ld$build_exeext; then
1932         # Build using linker in the current directory.
1933         gcc_cv_ld=./collect-ld$build_exeext
1934 elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
1935         gcc_cv_ld="$LD_FOR_TARGET"
1936 else
1937         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
1938 fi])
1939
1940 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
1941 PLUGIN_LD=`basename $gcc_cv_ld`
1942 AC_ARG_WITH(plugin-ld,
1943 [  --with-plugin-ld=[[ARG]]  specify the plugin linker],
1944 [if test x"$withval" != x; then
1945    ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
1946    PLUGIN_LD="$withval"
1947  fi])
1948 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
1949 AC_DEFINE_UNQUOTED(PLUGIN_LD, "$PLUGIN_LD", [Specify plugin linker])
1950
1951 # Check to see if we are using gold instead of ld
1952 AC_MSG_CHECKING(whether we are using gold)
1953 ld_is_gold=no
1954 if test x$gcc_cv_ld != x; then
1955   if $gcc_cv_ld --version 2>/dev/null | sed 1q \
1956      | grep "GNU gold" > /dev/null; then
1957     ld_is_gold=yes
1958   fi
1959 fi
1960 AC_MSG_RESULT($ld_is_gold)
1961
1962 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
1963 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
1964 case "$ORIGINAL_LD_FOR_TARGET" in
1965   ./collect-ld | ./collect-ld$build_exeext) ;;
1966   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
1967 esac
1968
1969 AC_MSG_CHECKING(what linker to use)
1970 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
1971    || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
1972         # Single tree build which includes ld.  We want to prefer it
1973         # over whatever linker top-level may have detected, since
1974         # we'll use what we're building after installation anyway.
1975         AC_MSG_RESULT(newly built ld)
1976         in_tree_ld=yes
1977         in_tree_ld_is_elf=no
1978         if (grep 'EMUL = .*elf' ../ld/Makefile \
1979             || grep 'EMUL = .*linux' ../ld/Makefile \
1980             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
1981           in_tree_ld_is_elf=yes
1982         elif test "$ld_is_gold" = yes; then
1983           in_tree_ld_is_elf=yes
1984         fi
1985         for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.in $gcc_cv_ld_gld_srcdir/Makefile.in
1986         do
1987 changequote(,)dnl
1988                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*\(VERSION=[0-9]*\.[0-9]*.*\)/\1/p' < $f`
1989                 if test x$gcc_cv_gld_version != x; then
1990                         break
1991                 fi
1992         done
1993         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
1994         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
1995 changequote([,])dnl
1996 else
1997         AC_MSG_RESULT($gcc_cv_ld)
1998         in_tree_ld=no
1999 fi
2000
2001 # Figure out what nm we will be using.
2002 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2003 AS_VAR_SET_IF(gcc_cv_nm,, [
2004 if test -f $gcc_cv_binutils_srcdir/configure.in \
2005      && test -f ../binutils/Makefile \
2006      && test x$build = x$host; then
2007         gcc_cv_nm=../binutils/nm-new$build_exeext
2008 elif test -x nm$build_exeext; then
2009         gcc_cv_nm=./nm$build_exeext
2010 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2011         gcc_cv_nm="$NM_FOR_TARGET"
2012 else
2013         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2014 fi])
2015
2016 AC_MSG_CHECKING(what nm to use)
2017 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2018         # Single tree build which includes binutils.
2019         AC_MSG_RESULT(newly built nm)
2020         in_tree_nm=yes
2021 else
2022         AC_MSG_RESULT($gcc_cv_nm)
2023         in_tree_nm=no
2024 fi
2025
2026 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2027 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2028 case "$ORIGINAL_NM_FOR_TARGET" in
2029   ./nm | ./nm$build_exeext) ;;
2030   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2031 esac
2032
2033
2034 # Figure out what objdump we will be using.
2035 AS_VAR_SET_IF(gcc_cv_objdump,, [
2036 if test -f $gcc_cv_binutils_srcdir/configure.in \
2037      && test -f ../binutils/Makefile \
2038      && test x$build = x$host; then
2039         # Single tree build which includes binutils.
2040         gcc_cv_objdump=../binutils/objdump$build_exeext
2041 elif test -x objdump$build_exeext; then
2042         gcc_cv_objdump=./objdump$build_exeext
2043 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2044         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2045 else
2046         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2047 fi])
2048
2049 AC_MSG_CHECKING(what objdump to use)
2050 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2051         # Single tree build which includes binutils.
2052         AC_MSG_RESULT(newly built objdump)
2053 elif test x$gcc_cv_objdump = x; then
2054         AC_MSG_RESULT(not found)
2055 else
2056         AC_MSG_RESULT($gcc_cv_objdump)
2057 fi
2058
2059 # Figure out what readelf we will be using.
2060 AS_VAR_SET_IF(gcc_cv_readelf,, [
2061 if test -f $gcc_cv_binutils_srcdir/configure.in \
2062      && test -f ../binutils/Makefile \
2063      && test x$build = x$host; then
2064         # Single tree build which includes binutils.
2065         gcc_cv_readelf=../binutils/readelf$build_exeext
2066 elif test -x readelf$build_exeext; then
2067         gcc_cv_readelf=./readelf$build_exeext
2068 else
2069         AC_PATH_PROG(gcc_cv_readelf, readelf)
2070 fi])
2071
2072 AC_MSG_CHECKING(what readelf to use)
2073 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2074         # Single tree build which includes binutils.
2075         AC_MSG_RESULT(newly built readelf)
2076 elif test x$gcc_cv_readelf = x; then
2077         AC_MSG_RESULT(not found)
2078 else
2079         AC_MSG_RESULT($gcc_cv_readelf)
2080 fi
2081
2082 # Figure out what assembler alignment features are present.
2083 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2084  [2,6,0],,
2085 [.balign 4
2086 .p2align 2],,
2087 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2088   [Define if your assembler supports .balign and .p2align.])])
2089
2090 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2091  [2,8,0],,
2092  [.p2align 4,,7],,
2093 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2094   [Define if your assembler supports specifying the maximum number
2095    of bytes to skip when using the GAS .p2align command.])])
2096
2097 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2098  [2,8,0],,
2099  [.literal16],,
2100 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2101   [Define if your assembler supports .literal16.])])
2102
2103 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2104  [elf,2,9,0],,
2105  [conftest_label1: .word 0
2106 .subsection -1
2107 conftest_label2: .word 0
2108 .previous],
2109  [if test x$gcc_cv_nm != x; then
2110     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2111     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2112     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2113     then :
2114     else gcc_cv_as_subsection_m1=yes
2115     fi
2116     rm -f conftest.nm1 conftest.nm2
2117   fi],
2118  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2119   [Define if your assembler supports .subsection and .subsection -1 starts
2120    emitting at the beginning of your section.])])
2121
2122 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2123  [2,2,0],,
2124  [      .weak foobar],,
2125 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2126
2127 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2128  [2,17,0],,
2129  [      .weakref foobar, barfnot],,
2130 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2131
2132 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2133  [2,15,91],,
2134  [      .SPACE $TEXT$
2135         .NSUBSPA $CODE$,COMDAT],,
2136 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2137
2138 # .hidden needs to be supported in both the assembler and the linker,
2139 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2140 # This is irritatingly difficult to feature test for; we have to check the
2141 # date string after the version number.  If we've got an in-tree
2142 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2143 # to be safe.
2144 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2145 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2146  [elf,2,13,0],,
2147 [       .hidden foobar
2148 foobar:],[
2149 # Solaris 9/x86 as incorrectly emits an alias for a hidden symbol with
2150 # STV_HIDDEN, so disable .hidden support if so.
2151 case "${target}" in
2152   i?86-*-solaris2*)
2153     if test x$gcc_cv_as != x && test x$gcc_cv_objdump != x; then
2154       cat > conftest.s <<EOF
2155 .globl hidden
2156         .hidden hidden
2157 hidden:
2158 .globl default
2159         .set    default,hidden
2160 EOF
2161       if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
2162         && $gcc_cv_objdump -t conftest.o 2>/dev/null | \
2163         grep '\.hidden default' > /dev/null; then
2164         gcc_cv_as_hidden=no
2165       else
2166         gcc_cv_as_hidden=yes
2167       fi
2168     else
2169       # Assume bug is present if objdump is missing.
2170       gcc_cv_as_hidden=no
2171     fi
2172     ;;
2173   *)
2174     gcc_cv_as_hidden=yes
2175     ;;
2176 esac])
2177
2178 # gnu_indirect_function type is an extension proposed at
2179 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2180 # selection of function implementation
2181 AC_ARG_ENABLE(gnu-indirect-function,
2182  [AS_HELP_STRING([--enable-gnu-indirect-function],
2183                  [enable the use of the @gnu_indirect_function to glibc systems])],
2184  [case $enable_gnu_indirect_function in
2185     yes | no) ;;
2186     *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2187 Valid choices are 'yes' and 'no'.]) ;;
2188   esac],
2189  [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2190 if test x$enable_gnu_indirect_function = xyes; then
2191   AC_DEFINE(HAVE_GNU_INDIRECT_FUNCTION, 1,
2192    [Define if your system supports gnu indirect functions.])
2193 fi
2194
2195 changequote(,)dnl
2196 if test $in_tree_ld != yes ; then
2197   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2198   if echo "$ld_ver" | grep GNU > /dev/null; then
2199     if test x"$ld_is_gold" = xyes; then
2200       # GNU gold --version looks like this:
2201       #
2202       # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
2203       #
2204       # We extract the binutils version which is more familiar and specific
2205       # than the gold version.
2206       ld_vers=`echo $ld_ver | sed -n \
2207           -e 's,^[^)]*[  ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
2208     else
2209       # GNU ld --version looks like this:
2210       #
2211       # GNU ld (GNU Binutils) 2.21.51.20110225
2212       ld_vers=`echo $ld_ver | sed -n \
2213           -e 's,^.*[     ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2214     fi
2215     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2216     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2217     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2218     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2219   else
2220     case "${target}" in
2221       *-*-solaris2*)
2222         #
2223         # Solaris 2 ld -V output looks like this for a regular version:
2224         #
2225         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699
2226         #
2227         # but test versions add stuff at the end:
2228         #
2229         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10
2230         #
2231         ld_ver=`$gcc_cv_ld -V 2>&1`
2232         if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2233           ld_vers=`echo $ld_ver | sed -n \
2234             -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2235           ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2236           ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2237         fi
2238         ;;
2239     esac
2240   fi
2241 fi
2242 changequote([,])dnl
2243
2244 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2245 [[if test $in_tree_ld = yes ; then
2246   gcc_cv_ld_hidden=no
2247   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2248      && test $in_tree_ld_is_elf = yes; then
2249      gcc_cv_ld_hidden=yes
2250   fi
2251 else
2252   gcc_cv_ld_hidden=yes
2253   if test x"$ld_is_gold" = xyes; then
2254     :
2255   elif echo "$ld_ver" | grep GNU > /dev/null; then
2256     if test 0"$ld_date" -lt 20020404; then
2257       if test -n "$ld_date"; then
2258         # If there was date string, but was earlier than 2002-04-04, fail
2259         gcc_cv_ld_hidden=no
2260       elif test -z "$ld_vers"; then
2261         # If there was no date string nor ld version number, something is wrong
2262         gcc_cv_ld_hidden=no
2263       else
2264         test -z "$ld_vers_patch" && ld_vers_patch=0
2265         if test "$ld_vers_major" -lt 2; then
2266           gcc_cv_ld_hidden=no
2267         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2268           gcc_cv_ld_hidden="no"
2269         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2270           gcc_cv_ld_hidden=no
2271         fi
2272       fi
2273     fi
2274   else
2275     case "${target}" in
2276       hppa64*-*-hpux* | ia64*-*-hpux*)
2277         gcc_cv_ld_hidden=yes
2278         ;;
2279       *-*-solaris2.8*)
2280         # .hidden support was backported to Solaris 8, starting with ld
2281         # version 1.276.
2282         if test "$ld_vers_minor" -ge 276; then
2283           gcc_cv_ld_hidden=yes
2284         else
2285           gcc_cv_ld_hidden=no
2286         fi
2287         ;;
2288       *-*-solaris2.9* | *-*-solaris2.1[0-9]*)
2289         # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2290         # .symbolic was only added in Solaris 9 12/02.
2291         gcc_cv_ld_hidden=yes
2292         ;;
2293       *)
2294         gcc_cv_ld_hidden=no
2295         ;;
2296     esac
2297   fi
2298 fi]])
2299 libgcc_visibility=no
2300 AC_SUBST(libgcc_visibility)
2301 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2302 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2303   libgcc_visibility=yes
2304   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2305   [Define if your assembler and linker support .hidden.])
2306 fi
2307
2308 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2309 gcc_cv_ld_ro_rw_mix=unknown
2310 if test $in_tree_ld = yes ; then
2311   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2312      && test $in_tree_ld_is_elf = yes; then
2313     gcc_cv_ld_ro_rw_mix=read-write
2314   fi
2315 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2316   echo '.section myfoosect, "a"' > conftest1.s
2317   echo '.section myfoosect, "aw"' > conftest2.s
2318   echo '.byte 1' >> conftest2.s
2319   echo '.section myfoosect, "a"' > conftest3.s
2320   echo '.byte 0' >> conftest3.s
2321   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2322      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2323      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2324      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2325         conftest2.o conftest3.o > /dev/null 2>&1; then
2326     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2327                          | sed -e '/myfoosect/!d' -e N`
2328     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2329       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2330         gcc_cv_ld_ro_rw_mix=read-only
2331       else
2332         gcc_cv_ld_ro_rw_mix=read-write
2333       fi
2334     fi
2335   fi
2336 changequote(,)dnl
2337   rm -f conftest.* conftest[123].*
2338 changequote([,])dnl
2339 fi
2340 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2341         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2342   [Define if your linker links a mix of read-only
2343    and read-write sections into a read-write section.])
2344 fi
2345 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2346
2347 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2348 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2349   [elf,2,11,0],,
2350 [       .data
2351         .uleb128 L2 - L1
2352 L1:
2353         .uleb128 1280
2354         .sleb128 -1010
2355 L2:],
2356 [[# GAS versions before 2.11 do not support uleb128,
2357   # despite appearing to.
2358   # ??? There exists an elf-specific test that will crash
2359   # the assembler.  Perhaps it's better to figure out whether
2360   # arbitrary sections are supported and try the test.
2361   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2362   if echo "$as_ver" | grep GNU > /dev/null; then
2363     as_vers=`echo $as_ver | sed -n \
2364         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2365     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2366     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2367     if test $as_major -eq 2 && test $as_minor -lt 11
2368     then :
2369     else gcc_cv_as_leb128=yes
2370     fi
2371   fi]],
2372   [AC_DEFINE(HAVE_AS_LEB128, 1,
2373     [Define if your assembler supports .sleb128 and .uleb128.])])
2374
2375 # Check if we have assembler support for unwind directives.
2376 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2377   ,,
2378 [       .text
2379         .cfi_startproc
2380         .cfi_offset 0, 0
2381         .cfi_same_value 1
2382         .cfi_def_cfa 1, 2
2383         .cfi_escape 1, 2, 3, 4, 5
2384         .cfi_endproc],
2385 [case "$target" in
2386   *-*-solaris*)
2387     # If the linker used on Solaris (like Sun ld) isn't capable of merging
2388     # read-only and read-write sections, we need to make sure that the
2389     # assembler used emits read-write .eh_frame sections.
2390     if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2391       if test "x$gcc_cv_objdump" != x; then
2392         if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2393                 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2394           gcc_cv_as_cfi_directive=no
2395         else
2396           case "$target" in
2397             i?86-*-solaris2.1[[0-9]]*)
2398               # On Solaris/x86, make sure that GCC and gas agree on using
2399               # read-only .eh_frame sections for 64-bit.
2400               if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \
2401                 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2402                         sed -e /.eh_frame/!d -e N | \
2403                         grep READONLY > /dev/null; then
2404                 gcc_cv_as_cfi_directive=yes
2405               else
2406                 gcc_cv_as_cfi_directive=no
2407               fi
2408               ;;
2409             *)
2410               gcc_cv_as_cfi_directive=yes
2411               ;;
2412           esac
2413         fi
2414       else
2415         # no objdump, err on the side of caution
2416         gcc_cv_as_cfi_directive=no
2417       fi
2418     else
2419       gcc_cv_as_cfi_directive=yes
2420     fi
2421     ;;
2422   *-*-*)
2423     gcc_cv_as_cfi_directive=yes
2424     ;;
2425 esac])
2426 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2427 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2428   ,,
2429 [       .text
2430         .cfi_startproc
2431         .cfi_adjust_cfa_offset 64
2432         .skip 75040, 0
2433         .cfi_adjust_cfa_offset 128
2434         .cfi_endproc],
2435 [[
2436 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2437     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
2438    gcc_cv_as_cfi_advance_working=yes
2439 fi
2440 ]])
2441 else
2442   # no objdump, err on the side of caution
2443   gcc_cv_as_cfi_advance_working=no
2444 fi
2445 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2446 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2447   [`if test $gcc_cv_as_cfi_directive = yes \
2448        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2449   [Define 0/1 if your assembler supports CFI directives.])
2450
2451 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2452 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2453   gcc_cv_as_cfi_personality_directive, ,,
2454 [       .text
2455         .cfi_startproc
2456         .cfi_personality 0, symbol
2457         .cfi_endproc])
2458 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2459   [`if test $gcc_cv_as_cfi_personality_directive = yes;
2460     then echo 1; else echo 0; fi`],
2461   [Define 0/1 if your assembler supports .cfi_personality.])
2462
2463 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2464   gcc_cv_as_cfi_sections_directive, ,,
2465 [       .text
2466         .cfi_sections .debug_frame, .eh_frame
2467         .cfi_startproc
2468         .cfi_endproc],
2469 [case $target_os in
2470   win32 | pe | cygwin* | mingw32* | uwin*)
2471     # Need to check that we generated the correct relocation for the
2472     # .debug_frame section.  This was fixed for binutils 2.21.
2473     gcc_cv_as_cfi_sections_directive=no
2474     if test "x$gcc_cv_objdump" != x; then
2475      if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2476         grep secrel > /dev/null; then
2477       gcc_cv_as_cfi_sections_directive=yes
2478      fi
2479     fi
2480     ;;
2481   *)
2482     gcc_cv_as_cfi_sections_directive=yes
2483     ;;
2484 esac])
2485 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2486 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2487   [`if test $gcc_cv_as_cfi_sections_directive = yes;
2488     then echo 1; else echo 0; fi`],
2489   [Define 0/1 if your assembler supports .cfi_sections.])
2490
2491 # GAS versions up to and including 2.11.0 may mis-optimize
2492 # .eh_frame data.
2493 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2494   [elf,2,12,0],,
2495 [       .text
2496 .LFB1:
2497         .4byte  0
2498 .L1:
2499         .4byte  0
2500 .LFE1:
2501         .section        .eh_frame,"aw",@progbits
2502 __FRAME_BEGIN__:
2503         .4byte  .LECIE1-.LSCIE1
2504 .LSCIE1:
2505         .4byte  0x0
2506         .byte   0x1
2507         .ascii "z\0"
2508         .byte   0x1
2509         .byte   0x78
2510         .byte   0x1a
2511         .byte   0x0
2512         .byte   0x4
2513         .4byte  1
2514         .p2align 1
2515 .LECIE1:
2516 .LSFDE1:
2517         .4byte  .LEFDE1-.LASFDE1
2518 .LASFDE1:
2519         .4byte  .LASFDE1-__FRAME_BEGIN__
2520         .4byte  .LFB1
2521         .4byte  .LFE1-.LFB1
2522         .byte   0x4
2523         .4byte  .LFE1-.LFB1
2524         .byte   0x4
2525         .4byte  .L1-.LFB1
2526 .LEFDE1:],
2527 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2528 cat > conftest.lit <<EOF
2529  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2530  0010 01000000 12000000 18000000 00000000  ................
2531  0020 08000000 04080000 0044               .........D      @&t@
2532 EOF
2533 cat > conftest.big <<EOF
2534  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2535  0010 00000001 00000012 00000018 00000000  ................
2536  0020 00000008 04000000 0844               .........D      @&t@
2537 EOF
2538   # If the assembler didn't choke, and we can objdump,
2539   # and we got the correct data, then succeed.
2540   # The text in the here-document typically retains its unix-style line
2541   # endings, while the output of objdump will use host line endings.
2542   # Therefore, use diff -b for the comparisons.
2543   if test x$gcc_cv_objdump != x \
2544   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2545      | tail -3 > conftest.got \
2546   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2547     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2548   then
2549     gcc_cv_as_eh_frame=yes
2550   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2551     gcc_cv_as_eh_frame=buggy
2552   else
2553     # Uh oh, what do we do now?
2554     gcc_cv_as_eh_frame=no
2555   fi])
2556
2557 if test $gcc_cv_as_eh_frame = buggy; then
2558   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2559   [Define if your assembler mis-optimizes .eh_frame data.])
2560 fi
2561
2562 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2563  [elf,2,12,0], [--fatal-warnings],
2564  [.section .rodata.str, "aMS", @progbits, 1])
2565 if test $gcc_cv_as_shf_merge = no; then
2566   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2567     [elf,2,12,0], [--fatal-warnings],
2568     [.section .rodata.str, "aMS", %progbits, 1])
2569 fi
2570 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2571   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2572 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2573
2574 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group,
2575  [elf,2,16,0], [--fatal-warnings],
2576  [.section .text,"axG",@progbits,.foo,comdat])
2577 if test $gcc_cv_as_comdat_group = yes; then
2578   gcc_cv_as_comdat_group_percent=no
2579 else
2580  gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group_percent,
2581    [elf,2,16,0], [--fatal-warnings],
2582    [.section .text,"axG",%progbits,.foo,comdat])
2583 fi
2584 if test x"$ld_is_gold" = xyes; then
2585   comdat_group=yes
2586 elif test $in_tree_ld = yes ; then
2587   comdat_group=no
2588   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
2589      && test $in_tree_ld_is_elf = yes; then
2590      comdat_group=yes
2591   fi
2592 elif echo "$ld_ver" | grep GNU > /dev/null; then
2593   comdat_group=yes
2594   if test 0"$ld_date" -lt 20050308; then
2595     if test -n "$ld_date"; then
2596       # If there was date string, but was earlier than 2005-03-08, fail
2597       comdat_group=no
2598     elif test "$ld_vers_major" -lt 2; then
2599       comdat_group=no
2600     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2601       comdat_group=no
2602     fi
2603   fi
2604 else
2605 changequote(,)dnl
2606   case "${target}" in
2607     *-*-solaris2.1[1-9]*)
2608       # Sun ld has COMDAT group support since Solaris 9, but it doesn't
2609       # interoperate with GNU as until Solaris 11 build 130, i.e. ld
2610       # version 1.688.
2611       #
2612       # FIXME: Maybe need to refine later when COMDAT group support with
2613       # Sun as is implemented.
2614       if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 1688; then
2615         comdat_group=yes
2616       else
2617         comdat_group=no
2618       fi
2619       ;;
2620     *)
2621       # Assume linkers other than GNU ld don't support COMDAT group.
2622       comdat_group=no
2623       ;;
2624   esac
2625 changequote([,])dnl
2626 fi
2627 # Allow overriding the automatic COMDAT group tests above.
2628 AC_ARG_ENABLE(comdat,
2629   [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
2630   [comdat_group="$enable_comdat"])
2631 if test $comdat_group = no; then
2632   gcc_cv_as_comdat_group=no
2633   gcc_cv_as_comdat_group_percent=no
2634 fi
2635 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2636   [`if test $gcc_cv_as_comdat_group = yes || test $gcc_cv_as_comdat_group_percent = yes; then echo 1; else echo 0; fi`],
2637 [Define 0/1 if your assembler and linker support COMDAT groups.])
2638
2639 gcc_GAS_CHECK_FEATURE([line table discriminator support],
2640  gcc_cv_as_discriminator,
2641  [2,19,51],,
2642 [       .text
2643         .file 1 "conf.c"
2644         .loc 1 1 0 discriminator 1],,
2645 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
2646   [Define if your assembler supports the .loc discriminator sub-directive.])])
2647
2648 # Thread-local storage - the check is heavily parameterized.
2649 conftest_s=
2650 tls_first_major=
2651 tls_first_minor=
2652 tls_as_opt=
2653 case "$target" in
2654 changequote(,)dnl
2655   alpha*-*-*)
2656     conftest_s='
2657         .section ".tdata","awT",@progbits
2658 foo:    .long   25
2659         .text
2660         ldq     $27,__tls_get_addr($29)         !literal!1
2661         lda     $16,foo($29)                    !tlsgd!1
2662         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
2663         ldq     $27,__tls_get_addr($29)         !literal!2
2664         lda     $16,foo($29)                    !tlsldm!2
2665         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
2666         ldq     $1,foo($29)                     !gotdtprel
2667         ldah    $2,foo($29)                     !dtprelhi
2668         lda     $3,foo($2)                      !dtprello
2669         lda     $4,foo($29)                     !dtprel
2670         ldq     $1,foo($29)                     !gottprel
2671         ldah    $2,foo($29)                     !tprelhi
2672         lda     $3,foo($2)                      !tprello
2673         lda     $4,foo($29)                     !tprel'
2674         tls_first_major=2
2675         tls_first_minor=13
2676         tls_as_opt=--fatal-warnings
2677         ;;
2678   cris-*-*|crisv32-*-*)
2679     conftest_s='
2680         .section ".tdata","awT",@progbits
2681 x:      .long   25
2682         .text
2683         move.d x:IE,$r10
2684         nop'
2685         tls_first_major=2
2686         tls_first_minor=20
2687         tls_as_opt=--fatal-warnings
2688         ;;
2689   frv*-*-*)
2690     conftest_s='
2691         .section ".tdata","awT",@progbits
2692 x:      .long   25
2693         .text
2694         call    #gettlsoff(x)'
2695         tls_first_major=2
2696         tls_first_minor=14
2697         ;;
2698   hppa*-*-linux*)
2699     conftest_s='
2700 t1:     .reg    %r20
2701 t2:     .reg    %r21
2702 gp:     .reg    %r19
2703         .section ".tdata","awT",@progbits
2704 foo:    .long   25
2705         .text
2706         .align  4
2707         addil LT%foo-$tls_gdidx$,gp
2708         ldo RT%foo-$tls_gdidx$(%r1),%arg0
2709         b __tls_get_addr
2710         nop
2711         addil LT%foo-$tls_ldidx$,gp
2712         b __tls_get_addr
2713         ldo RT%foo-$tls_ldidx$(%r1),%arg0
2714         addil LR%foo-$tls_dtpoff$,%ret0
2715         ldo RR%foo-$tls_dtpoff$(%r1),%t1
2716         mfctl %cr27,%t1
2717         addil LT%foo-$tls_ieoff$,gp
2718         ldw RT%foo-$tls_ieoff$(%r1),%t2
2719         add %t1,%t2,%t3
2720         mfctl %cr27,%t1
2721         addil LR%foo-$tls_leoff$,%t1
2722         ldo RR%foo-$tls_leoff$(%r1),%t2'
2723         tls_first_major=2
2724         tls_first_minor=15
2725         tls_as_opt=--fatal-warnings
2726         ;;
2727   arm*-*-*)
2728     conftest_s='
2729         .section ".tdata","awT",%progbits
2730 foo:    .long   25
2731         .text
2732 .word foo(gottpoff)
2733 .word foo(tpoff)
2734 .word foo(tlsgd)
2735 .word foo(tlsldm)
2736 .word foo(tlsldo)'
2737         tls_first_major=2
2738         tls_first_minor=17
2739         ;;
2740   i[34567]86-*-*)
2741     case "$target" in
2742       i[34567]86-*-solaris2.*)
2743         on_solaris=yes
2744         tga_func=___tls_get_addr
2745         ;;
2746       *)
2747         on_solaris=no
2748         ;;
2749     esac
2750     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2751       conftest_s='
2752         .section .tdata,"awt",@progbits'
2753       tls_first_major=0
2754       tls_first_minor=0
2755 changequote([,])dnl
2756       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
2757 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
2758 changequote(,)dnl
2759     else
2760       conftest_s='
2761         .section ".tdata","awT",@progbits'
2762       tls_first_major=2
2763       tls_first_minor=14
2764       tls_as_opt="--fatal-warnings"
2765     fi
2766     conftest_s="$conftest_s
2767 foo:    .long   25
2768         .text
2769         movl    %gs:0, %eax
2770         leal    foo@tlsgd(,%ebx,1), %eax
2771         leal    foo@tlsldm(%ebx), %eax
2772         leal    foo@dtpoff(%eax), %edx
2773         movl    foo@gottpoff(%ebx), %eax
2774         subl    foo@gottpoff(%ebx), %eax
2775         addl    foo@gotntpoff(%ebx), %eax
2776         movl    foo@indntpoff, %eax
2777         movl    \$foo@tpoff, %eax
2778         subl    \$foo@tpoff, %eax
2779         leal    foo@ntpoff(%ecx), %eax"
2780     ;;
2781   x86_64-*-*)
2782     conftest_s='
2783         .section ".tdata","awT",@progbits
2784 foo:    .long   25
2785         .text
2786         movq    %fs:0, %rax
2787         leaq    foo@TLSGD(%rip), %rdi
2788         leaq    foo@TLSLD(%rip), %rdi
2789         leaq    foo@DTPOFF(%rax), %rdx
2790         movq    foo@GOTTPOFF(%rip), %rax
2791         movq    $foo@TPOFF, %rax'
2792         tls_first_major=2
2793         tls_first_minor=14
2794         tls_as_opt=--fatal-warnings
2795         ;;
2796   ia64-*-*)
2797     conftest_s='
2798         .section ".tdata","awT",@progbits
2799 foo:    data8   25
2800         .text
2801         addl    r16 = @ltoff(@dtpmod(foo#)), gp
2802         addl    r17 = @ltoff(@dtprel(foo#)), gp
2803         addl    r18 = @ltoff(@tprel(foo#)), gp
2804         addl    r19 = @dtprel(foo#), gp
2805         adds    r21 = @dtprel(foo#), r13
2806         movl    r23 = @dtprel(foo#)
2807         addl    r20 = @tprel(foo#), gp
2808         adds    r22 = @tprel(foo#), r13
2809         movl    r24 = @tprel(foo#)'
2810         tls_first_major=2
2811         tls_first_minor=13
2812         tls_as_opt=--fatal-warnings
2813         ;;
2814   mips*-*-*)
2815     conftest_s='
2816         .section .tdata,"awT",@progbits
2817 x:
2818         .word 2
2819         .text
2820         addiu $4, $28, %tlsgd(x)
2821         addiu $4, $28, %tlsldm(x)
2822         lui $4, %dtprel_hi(x)
2823         addiu $4, $4, %dtprel_lo(x)
2824         lw $4, %gottprel(x)($28)
2825         lui $4, %tprel_hi(x)
2826         addiu $4, $4, %tprel_lo(x)'
2827         tls_first_major=2
2828         tls_first_minor=16
2829         tls_as_opt='-32 --fatal-warnings'
2830         ;;
2831   m68k-*-*)
2832     conftest_s='
2833         .section .tdata,"awT",@progbits
2834 x:
2835         .word 2
2836         .text
2837 foo:
2838         move.l x@TLSGD(%a5),%a0
2839         move.l x@TLSLDM(%a5),%a0
2840         move.l x@TLSLDO(%a5),%a0
2841         move.l x@TLSIE(%a5),%a0
2842         move.l x@TLSLE(%a5),%a0'
2843         tls_first_major=2
2844         tls_first_minor=19
2845         tls_as_opt='--fatal-warnings'
2846         ;;
2847   powerpc-*-*)
2848     conftest_s='
2849         .section ".tdata","awT",@progbits
2850         .align 2
2851 ld0:    .space 4
2852 ld1:    .space 4
2853 x1:     .space 4
2854 x2:     .space 4
2855 x3:     .space 4
2856         .text
2857         addi 3,31,ld0@got@tlsgd
2858         bl __tls_get_addr
2859         addi 3,31,x1@got@tlsld
2860         bl __tls_get_addr
2861         addi 9,3,x1@dtprel
2862         addis 9,3,x2@dtprel@ha
2863         addi 9,9,x2@dtprel@l
2864         lwz 9,x3@got@tprel(31)
2865         add 9,9,x@tls
2866         addi 9,2,x1@tprel
2867         addis 9,2,x2@tprel@ha
2868         addi 9,9,x2@tprel@l'
2869         tls_first_major=2
2870         tls_first_minor=14
2871         tls_as_opt="-a32 --fatal-warnings"
2872         ;;
2873   powerpc64-*-*)
2874     conftest_s='
2875         .section ".tdata","awT",@progbits
2876         .align 3
2877 ld0:    .space 8
2878 ld1:    .space 8
2879 x1:     .space 8
2880 x2:     .space 8
2881 x3:     .space 8
2882         .text
2883         addi 3,2,ld0@got@tlsgd
2884         bl .__tls_get_addr
2885         nop
2886         addi 3,2,ld1@toc
2887         bl .__tls_get_addr
2888         nop
2889         addi 3,2,x1@got@tlsld
2890         bl .__tls_get_addr
2891         nop
2892         addi 9,3,x1@dtprel
2893         bl .__tls_get_addr
2894         nop
2895         addis 9,3,x2@dtprel@ha
2896         addi 9,9,x2@dtprel@l
2897         bl .__tls_get_addr
2898         nop
2899         ld 9,x3@got@dtprel(2)
2900         add 9,9,3
2901         bl .__tls_get_addr
2902         nop'
2903         tls_first_major=2
2904         tls_first_minor=14
2905         tls_as_opt="-a64 --fatal-warnings"
2906         ;;
2907   s390-*-*)
2908     conftest_s='
2909         .section ".tdata","awT",@progbits
2910 foo:    .long   25
2911         .text
2912         .long   foo@TLSGD
2913         .long   foo@TLSLDM
2914         .long   foo@DTPOFF
2915         .long   foo@NTPOFF
2916         .long   foo@GOTNTPOFF
2917         .long   foo@INDNTPOFF
2918         l       %r1,foo@GOTNTPOFF(%r12)
2919         l       %r1,0(%r1):tls_load:foo
2920         bas     %r14,0(%r1,%r13):tls_gdcall:foo
2921         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
2922         tls_first_major=2
2923         tls_first_minor=14
2924         tls_as_opt="-m31 --fatal-warnings"
2925         ;;
2926   s390x-*-*)
2927     conftest_s='
2928         .section ".tdata","awT",@progbits
2929 foo:    .long   25
2930         .text
2931         .quad   foo@TLSGD
2932         .quad   foo@TLSLDM
2933         .quad   foo@DTPOFF
2934         .quad   foo@NTPOFF
2935         .quad   foo@GOTNTPOFF
2936         lg      %r1,foo@GOTNTPOFF(%r12)
2937         larl    %r1,foo@INDNTPOFF
2938         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
2939         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
2940         tls_first_major=2
2941         tls_first_minor=14
2942         tls_as_opt="-m64 -Aesame --fatal-warnings"
2943         ;;
2944   sh-*-* | sh[34]-*-*)
2945     conftest_s='
2946         .section ".tdata","awT",@progbits
2947 foo:    .long   25
2948         .text
2949         .long   foo@TLSGD
2950         .long   foo@TLSLDM
2951         .long   foo@DTPOFF
2952         .long   foo@GOTTPOFF
2953         .long   foo@TPOFF'
2954         tls_first_major=2
2955         tls_first_minor=13
2956         tls_as_opt=--fatal-warnings
2957         ;;
2958   sparc*-*-*)
2959     case "$target" in
2960       sparc*-sun-solaris2.*)
2961         on_solaris=yes
2962         tga_func=__tls_get_addr
2963         ;;
2964       *)
2965         on_solaris=no
2966         ;;
2967     esac
2968     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2969       conftest_s='
2970         .section ".tdata",#alloc,#write,#tls'
2971         tls_first_major=0
2972         tls_first_minor=0
2973     else
2974       conftest_s='
2975         .section ".tdata","awT",@progbits'
2976         tls_first_major=2
2977         tls_first_minor=14
2978         tls_as_opt="-32 --fatal-warnings"
2979     fi
2980     conftest_s="$conftest_s
2981 foo:    .long   25
2982         .text
2983         sethi   %tgd_hi22(foo), %o0
2984         add     %o0, %tgd_lo10(foo), %o1
2985         add     %l7, %o1, %o0, %tgd_add(foo)
2986         call    __tls_get_addr, %tgd_call(foo)
2987         sethi   %tldm_hi22(foo), %l1
2988         add     %l1, %tldm_lo10(foo), %l2
2989         add     %l7, %l2, %o0, %tldm_add(foo)
2990         call    __tls_get_addr, %tldm_call(foo)
2991         sethi   %tldo_hix22(foo), %l3
2992         xor     %l3, %tldo_lox10(foo), %l4
2993         add     %o0, %l4, %l5, %tldo_add(foo)
2994         sethi   %tie_hi22(foo), %o3
2995         add     %o3, %tie_lo10(foo), %o3
2996         ld      [%l7 + %o3], %o2, %tie_ld(foo)
2997         add     %g7, %o2, %o4, %tie_add(foo)
2998         sethi   %tle_hix22(foo), %l1
2999         xor     %l1, %tle_lox10(foo), %o5
3000         ld      [%g7 + %o5], %o1"
3001         ;;
3002   xtensa*-*-*)
3003     conftest_s='
3004         .section ".tdata","awT",@progbits
3005 foo:    .long   25
3006         .text
3007         movi    a8, foo@TLSFUNC
3008         movi    a10, foo@TLSARG
3009         callx8.tls a8, foo@TLSCALL'
3010         tls_first_major=2
3011         tls_first_minor=19
3012         ;;
3013 changequote([,])dnl
3014 esac
3015 set_have_as_tls=no
3016 if test "x$enable_tls" = xno ; then
3017   : # TLS explicitly disabled.
3018 elif test "x$enable_tls" = xyes ; then
3019   set_have_as_tls=yes # TLS explicitly enabled.
3020 elif test -z "$tls_first_major"; then
3021   : # If we don't have a check, assume no support.
3022 else
3023   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
3024   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
3025   [set_have_as_tls=yes])
3026 fi
3027 case "$target" in
3028   *-*-irix6*)
3029     # IRIX 6.5 rld and libc.so lack TLS support, so even if gas and gld
3030     # with TLS support are in use, native TLS cannot work.
3031     set_have_as_tls=no
3032     ;;
3033   *-*-osf*)
3034     # Tru64 UNIX loader and libc.so lack TLS support, so even if gas and
3035     # gld with TLS support are in use, native TLS cannot work.
3036     set_have_as_tls=no
3037     ;;
3038   # TLS was introduced in the Solaris 9 FCS release and backported to
3039   # Solaris 8 patches.  Support for GNU-style TLS on x86 was only
3040   # introduced in Solaris 9 4/04, replacing the earlier Sun style that Sun
3041   # ld and GCC don't support any longer.
3042   *-*-solaris2.*)
3043     AC_MSG_CHECKING(linker and ld.so.1 TLS support)
3044     ld_tls_support=no
3045     # Check ld and ld.so.1 TLS support.
3046     if echo "$ld_ver" | grep GNU > /dev/null; then
3047       # Assume all interesting versions of GNU ld have TLS support.
3048       # FIXME: still need ld.so.1 support, i.e. ld version checks below.
3049       ld_tls_support=yes
3050     else
3051       case "$target" in
3052         # Solaris 8/x86 ld has GNU style TLS support since version 1.280.
3053         i?86-*-solaris2.8)
3054           min_tls_ld_vers_minor=280
3055           ;;
3056         # Solaris 8/SPARC ld has TLS support since version 1.272.
3057         sparc*-*-solaris2.8)
3058           min_tls_ld_vers_minor=272
3059           ;;
3060         # Solaris 9/x86 ld has GNU style TLS support since version 1.374.
3061         i?86-*-solaris2.9)
3062           min_tls_ld_vers_minor=374
3063           ;;
3064         # Solaris 9/SPARC and Solaris 10+ ld have TLS support since FCS.
3065         sparc*-*-solaris2.9 | *-*-solaris2.1[[0-9]]*)
3066           min_tls_ld_vers_minor=343
3067           ;;
3068       esac
3069       if test "$ld_vers_major" -gt 1 || \
3070         test "$ld_vers_minor" -ge "$min_tls_ld_vers_minor"; then
3071         ld_tls_support=yes
3072       else
3073         set_have_as_tls=no
3074       fi
3075     fi
3076     AC_MSG_RESULT($ld_tls_support)
3077
3078     save_LIBS="$LIBS"
3079     save_LDFLAGS="$LDFLAGS"
3080     LIBS=
3081     LDFLAGS=
3082
3083     AC_MSG_CHECKING(alternate thread library)
3084     case "$target" in
3085       # TLS support was backported to Solaris 8 patches, but only lives in
3086       # the alternate thread library which became the default in Solaris 9.
3087       # We want to always use that, irrespective of TLS support.
3088       *-*-solaris2.8)
3089         # Take multilib subdir into account.  There's no spec to handle
3090         # this.  The 64 symlink exists since Solaris 8.
3091         lwp_dir=/usr/lib/lwp
3092         lwp_spec="-L$lwp_dir%{m64:/64} -R$lwp_dir%{m64:/64}"
3093         LDFLAGS="-L$lwp_dir -R$lwp_dir"
3094         ;;
3095       *-*-solaris2*)
3096         lwp_dir="none"
3097         lwp_spec=""
3098         ;;
3099     esac
3100     # Always define LIB_THREAD_LDFLAGS_SPEC, even without TLS support.
3101     AC_DEFINE_UNQUOTED(LIB_THREAD_LDFLAGS_SPEC, "$lwp_spec",
3102         [Define to the linker flags to use for -pthread.])
3103     AC_MSG_RESULT($lwp_dir)
3104
3105     AC_MSG_CHECKING(library containing $tga_func)
3106     # Before Solaris 10, __tls_get_addr (SPARC/x64) resp. ___tls_get_addr
3107     # (32-bit x86) only lived in libthread, so check for that.  Keep
3108     # set_have_as_tls if found, disable if not.
3109     AC_SEARCH_LIBS([$tga_func], [thread],, [set_have_as_tls=no])
3110     # Clear LIBS if we cannot support TLS.
3111     if test $set_have_as_tls = no; then
3112       LIBS=
3113     fi
3114     # Always define LIB_TLS_SPEC, even without TLS support.
3115     AC_DEFINE_UNQUOTED(LIB_TLS_SPEC, "$LIBS",
3116         [Define to the library containing __tls_get_addr/___tls_get_addr.])
3117     AC_MSG_RESULT($LIBS)
3118
3119     LIBS="$save_LIBS"
3120     LDFLAGS="$save_LDFLAGS"
3121     ;;
3122 esac
3123 if test $set_have_as_tls = yes ; then
3124   AC_DEFINE(HAVE_AS_TLS, 1,
3125             [Define if your assembler and linker support thread-local storage.])
3126 fi
3127
3128 # Target-specific assembler checks.
3129
3130 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3131 gcc_cv_ld_static_dynamic=no
3132 gcc_cv_ld_static_option='-Bstatic'
3133 gcc_cv_ld_dynamic_option='-Bdynamic'
3134 if test $in_tree_ld = yes ; then
3135   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3136     gcc_cv_ld_static_dynamic=yes
3137   fi
3138 elif test x$gcc_cv_ld != x; then
3139   # Check if linker supports -Bstatic/-Bdynamic option
3140   if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
3141      && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
3142       gcc_cv_ld_static_dynamic=yes
3143   else
3144     case "$target" in
3145       # Tru64 UNIX support -noso/-so_archive instead of -Bstatic/-Bdynamic.
3146       alpha*-dec-osf*)
3147         gcc_cv_ld_static_dynamic=yes
3148         gcc_cv_ld_static_option="-noso"
3149         gcc_cv_ld_dynamic_option="-so_archive"
3150         ;;
3151       # IRIX 6 ld supports -Bstatic/-Bdynamic.
3152       mips-sgi-irix6*)
3153         gcc_cv_ld_static_dynamic=yes
3154         ;;
3155       # Solaris 2 ld always supports -Bstatic/-Bdynamic.
3156       *-*-solaris2*)
3157         gcc_cv_ld_static_dynamic=yes
3158         ;;
3159     esac
3160   fi
3161 fi
3162 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3163         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3164 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
3165         AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
3166 [Define to the linker option to disable use of shared objects.])
3167         AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
3168 [Define to the linker option to enable use of shared objects.])
3169 fi
3170 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3171
3172 if test x"$demangler_in_ld" = xyes; then
3173   AC_MSG_CHECKING(linker --demangle support)
3174   gcc_cv_ld_demangle=no
3175   if test $in_tree_ld = yes; then
3176     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3177       gcc_cv_ld_demangle=yes
3178     fi
3179   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3180     # Check if the GNU linker supports --demangle option
3181     if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
3182       gcc_cv_ld_demangle=yes
3183     fi
3184   fi
3185   if test x"$gcc_cv_ld_demangle" = xyes; then
3186     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3187 [Define if your linker supports --demangle option.])
3188   fi
3189   AC_MSG_RESULT($gcc_cv_ld_demangle)
3190 fi
3191
3192 AC_MSG_CHECKING(linker plugin support)
3193 gcc_cv_lto_plugin=0
3194 if test -f liblto_plugin.la; then
3195   if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET=" = x"$gcc_cv_ld"; then
3196     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
3197       gcc_cv_lto_plugin=2
3198     elif test "$ld_is_gold" = yes -a "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -eq 20; then
3199       gcc_cv_lto_plugin=1
3200
3201     fi
3202   elif echo "$ld_ver" | grep GNU > /dev/null; then
3203     # Require GNU ld or gold 2.21+ for plugin support by default.
3204     if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
3205       gcc_cv_lto_plugin=2
3206     # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
3207     elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
3208       gcc_cv_lto_plugin=1
3209     fi
3210   fi
3211 fi
3212 AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
3213   [Define to the level of your linker's plugin support.])
3214 AC_MSG_RESULT($gcc_cv_lto_plugin)
3215
3216 case "$target" in
3217   # All TARGET_ABI_OSF targets.
3218   alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
3219     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3220         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3221 [       .set nomacro
3222         .text
3223         extbl   $3, $2, $3      !lituse_bytoff!1
3224         ldq     $2, a($29)      !literal!1
3225         ldq     $4, b($29)      !literal!2
3226         ldq_u   $3, 0($2)       !lituse_base!1
3227         ldq     $27, f($29)     !literal!5
3228         jsr     $26, ($27), f   !lituse_jsr!5
3229         ldah    $29, 0($26)     !gpdisp!3
3230         lda     $0, c($29)      !gprel
3231         ldah    $1, d($29)      !gprelhigh
3232         lda     $1, d($1)       !gprellow
3233         lda     $29, 0($29)     !gpdisp!3],,
3234     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3235   [Define if your assembler supports explicit relocations.])])
3236     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3237         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3238 [       .set nomacro
3239         .text
3240         ldq     $27, a($29)     !literal!1
3241         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
3242     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3243   [Define if your assembler supports the lituse_jsrdirect relocation.])])
3244     ;;
3245
3246   cris-*-*)
3247     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3248       gcc_cv_as_cris_no_mul_bug,[2,15,91],
3249       [-no-mul-bug-abort], [.text],,
3250       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3251                 [Define if your assembler supports the -no-mul-bug-abort option.])])
3252     ;;
3253
3254   sparc*-*-*)
3255     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3256       [.register %g2, #scratch],,
3257       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3258                 [Define if your assembler supports .register.])])
3259
3260     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3261       [-relax], [.text],,
3262       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3263                 [Define if your assembler supports -relax option.])])
3264
3265     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3266       gcc_cv_as_sparc_gotdata_op,,
3267       [-K PIC],
3268 [.text
3269 foo:
3270         nop
3271 bar:
3272         sethi %gdop_hix22(foo), %g1
3273         xor    %g1, %gdop_lox10(foo), %g1
3274         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
3275       [if test x$gcc_cv_ld != x \
3276        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3277          if $gcc_cv_ld -v | grep GNU >/dev/null 2>&1; then
3278            if test x$gcc_cv_objdump != x; then
3279              if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3280                 | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3281                gcc_cv_as_sparc_gotdata_op=no
3282              else
3283                gcc_cv_as_sparc_gotdata_op=yes
3284              fi
3285            fi
3286          else
3287            gcc_cv_as_sparc_gotdata_op=yes
3288          fi
3289        fi
3290        rm -f conftest],
3291       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3292                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3293
3294     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3295       gcc_cv_as_sparc_ua_pcrel,,
3296       [-K PIC],
3297 [.text
3298 foo:
3299         nop
3300 .data
3301 .align 4
3302 .byte 0
3303 .uaword %r_disp32(foo)],
3304       [if test x$gcc_cv_ld != x \
3305        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3306          gcc_cv_as_sparc_ua_pcrel=yes
3307        fi
3308        rm -f conftest],
3309       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3310                 [Define if your assembler and linker support unaligned PC relative relocs.])
3311
3312       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3313         gcc_cv_as_sparc_ua_pcrel_hidden,,
3314         [-K PIC],
3315 [.data
3316 .align 4
3317 .byte 0x31
3318 .uaword %r_disp32(foo)
3319 .byte 0x32, 0x33, 0x34
3320 .global foo
3321 .hidden foo
3322 foo:
3323 .skip 4],
3324         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3325          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3326          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3327             | grep ' 31000000 07323334' > /dev/null 2>&1; then
3328             if $gcc_cv_objdump -R conftest 2> /dev/null \
3329                | grep 'DISP32' > /dev/null 2>&1; then
3330                 :
3331             else
3332                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3333             fi
3334          fi
3335          rm -f conftest],
3336          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3337                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3338     ]) # unaligned pcrel relocs
3339
3340     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3341       gcc_cv_as_sparc_offsetable_lo10,,
3342       [-xarch=v9],
3343 [.text
3344         or %g1, %lo(ab) + 12, %g1
3345         or %g1, %lo(ab + 12), %g1],
3346       [if test x$gcc_cv_objdump != x \
3347        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3348           | grep ' 82106000 82106000' > /dev/null 2>&1; then
3349          gcc_cv_as_sparc_offsetable_lo10=yes
3350        fi],
3351        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3352                  [Define if your assembler supports offsetable %lo().])])
3353     ;;
3354
3355 changequote(,)dnl
3356   i[34567]86-*-* | x86_64-*-*)
3357 changequote([,])dnl
3358     case $target_os in
3359       cygwin*)
3360         # Full C++ conformance when using a shared libstdc++-v3 requires some
3361         # support from the Cygwin DLL, which in more recent versions exports
3362         # wrappers to aid in interposing and redirecting operators new, delete,
3363         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
3364         # are configuring for a version of Cygwin that exports the wrappers.
3365         if test x$host = x$target; then
3366           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3367         else
3368           # Can't check presence of libc functions during cross-compile, so
3369           # we just have to assume we're building for an up-to-date target.
3370           gcc_ac_cygwin_dll_wrappers=yes
3371         fi
3372         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
3373           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
3374           [Define if you want to generate code by default that assumes that the
3375            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
3376     esac
3377     case $target_os in
3378       cygwin* | pe | mingw32*)
3379         # Recent binutils allows the three-operand form of ".comm" on PE.  This
3380         # definition is used unconditionally to initialise the default state of
3381         # the target option variable that governs usage of the feature.
3382         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
3383          [2,19,52],,[.comm foo,1,32])
3384         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
3385           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
3386           [Define if your assembler supports specifying the alignment
3387            of objects allocated using the GAS .comm command.])
3388         # Used for DWARF 2 in PE
3389         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
3390           gcc_cv_as_ix86_pe_secrel32,
3391           [2,15,91],,
3392 [.text
3393 foo:    nop
3394 .data
3395         .secrel32 foo],
3396           [if test x$gcc_cv_ld != x \
3397            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
3398              gcc_cv_as_ix86_pe_secrel32=yes
3399            fi
3400            rm -f conftest],
3401           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
3402             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
3403         # Test if the assembler supports the extended form of the .section
3404         # directive that specifies section alignment.  LTO support uses this,
3405         # but normally only after installation, so we warn but don't fail the
3406         # configure if LTO is enabled but the assembler does not support it.
3407         gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
3408           [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
3409         if test x$gcc_cv_as_section_has_align != xyes; then
3410           case ",$enable_languages," in
3411             *,lto,*)
3412               AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
3413               ;;
3414           esac
3415         fi
3416         ;;
3417     esac
3418
3419     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
3420        gcc_cv_as_ix86_filds,,,
3421        [filds mem; fists mem],,
3422        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
3423          [Define if your assembler uses filds and fists mnemonics.])])
3424
3425     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
3426        gcc_cv_as_ix86_fildq,,,
3427        [fildq mem; fistpq mem],,
3428        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
3429          [Define if your assembler uses fildq and fistq mnemonics.])])
3430
3431     gcc_GAS_CHECK_FEATURE([cmov syntax],
3432       gcc_cv_as_ix86_cmov_sun_syntax,,,
3433       [cmovl.l %edx, %eax],,
3434       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
3435         [Define if your assembler supports the Sun syntax for cmov.])])
3436
3437     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
3438       gcc_cv_as_ix86_ffreep,,,
3439       [ffreep %st(1)],,
3440       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
3441         [Define if your assembler supports the ffreep mnemonic.])])
3442
3443     gcc_GAS_CHECK_FEATURE([.quad directive],
3444       gcc_cv_as_ix86_quad,,,
3445       [.quad 0],,
3446       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
3447         [Define if your assembler supports the .quad directive.])])
3448
3449     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
3450       gcc_cv_as_ix86_sahf,,,
3451       [.code64
3452        sahf],,
3453       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
3454         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
3455
3456     gcc_GAS_CHECK_FEATURE([swap suffix],
3457       gcc_cv_as_ix86_swap,,,
3458       [movl.s %esp, %ebp],,
3459       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
3460         [Define if your assembler supports the swap suffix.])])
3461
3462     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
3463       gcc_cv_as_ix86_diff_sect_delta,,,
3464       [.section .rodata
3465 .L1:
3466         .long .L2-.L1
3467         .long .L3-.L1
3468         .text
3469 .L3:    nop
3470 .L2:    nop],,
3471       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
3472         [Define if your assembler supports the subtraction of symbols in different sections.])])
3473
3474     # These two are used unconditionally by i386.[ch]; it is to be defined
3475     # to 1 if the feature is present, 0 otherwise.
3476     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
3477         gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
3478 [       .text
3479 .L0:
3480         nop
3481         .data
3482         .long .L0@GOTOFF])
3483     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
3484       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
3485       [Define true if the assembler supports '.long foo@GOTOFF'.])
3486
3487     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
3488         gcc_cv_as_ix86_rep_lock_prefix,,,
3489         [rep movsl
3490          lock addl %edi, (%eax,%esi)
3491          lock orl $0, (%esp)],,
3492         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
3493           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
3494
3495     ;;
3496
3497   ia64*-*-*)
3498     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
3499         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
3500 [       .text
3501         addl r15 = @ltoffx(x#), gp
3502         ;;
3503         ld8.mov r16 = [[r15]], x#],,
3504     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
3505           [Define if your assembler supports ltoffx and ldxmov relocations.])])
3506
3507     ;;
3508
3509   powerpc*-*-*)
3510     case $target in
3511       *-*-aix*) conftest_s='    .machine "pwr5"
3512         .csect .text[[PR]]
3513         mfcr 3,128';;
3514       *-*-darwin*)
3515         gcc_GAS_CHECK_FEATURE([.machine directive support],
3516           gcc_cv_as_machine_directive,,,
3517           [     .machine ppc7400])
3518         if test x$gcc_cv_as_machine_directive != xyes; then
3519           echo "*** This target requires an assembler supporting \".machine\"" >&2
3520           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
3521           test x$build = x$target && exit 1
3522         fi
3523         conftest_s='    .text
3524         mfcr r3,128';;
3525       *) conftest_s='   .machine power4
3526         .text
3527         mfcr 3,128';;
3528     esac
3529
3530     gcc_GAS_CHECK_FEATURE([mfcr field support],
3531       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
3532       [$conftest_s],,
3533       [AC_DEFINE(HAVE_AS_MFCRF, 1,
3534           [Define if your assembler supports mfcr field.])])
3535
3536     case $target in
3537       *-*-aix*) conftest_s='    .machine "pwr5"
3538         .csect .text[[PR]]
3539         popcntb 3,3';;
3540       *) conftest_s='   .machine power5
3541         .text
3542         popcntb 3,3';;
3543     esac
3544
3545     gcc_GAS_CHECK_FEATURE([popcntb support],
3546       gcc_cv_as_powerpc_popcntb, [2,17,0],,
3547       [$conftest_s],,
3548       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
3549           [Define if your assembler supports popcntb field.])])
3550
3551     case $target in
3552       *-*-aix*) conftest_s='    .machine "pwr5x"
3553         .csect .text[[PR]]
3554         frin 1,1';;
3555       *) conftest_s='   .machine power5
3556         .text
3557         frin 1,1';;
3558     esac
3559
3560     gcc_GAS_CHECK_FEATURE([fp round support],
3561       gcc_cv_as_powerpc_fprnd, [2,17,0],,
3562       [$conftest_s],,
3563       [AC_DEFINE(HAVE_AS_FPRND, 1,
3564           [Define if your assembler supports fprnd.])])
3565
3566     case $target in
3567       *-*-aix*) conftest_s='    .machine "pwr6"
3568         .csect .text[[PR]]
3569         mffgpr 1,3';;
3570       *) conftest_s='   .machine power6
3571         .text
3572         mffgpr 1,3';;
3573     esac
3574
3575     gcc_GAS_CHECK_FEATURE([move fp gpr support],
3576       gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
3577       [$conftest_s],,
3578       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
3579           [Define if your assembler supports mffgpr and mftgpr.])])
3580
3581     case $target in
3582       *-*-aix*) conftest_s='    .csect .text[[PR]]
3583 LCF..0:
3584         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
3585       *-*-darwin*)
3586         conftest_s='    .text
3587 LCF0:
3588         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
3589       *) conftest_s='   .text
3590 .LCF0:
3591         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
3592     esac
3593
3594     gcc_GAS_CHECK_FEATURE([rel16 relocs],
3595       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
3596       [$conftest_s],,
3597       [AC_DEFINE(HAVE_AS_REL16, 1,
3598           [Define if your assembler supports R_PPC_REL16 relocs.])])
3599
3600     case $target in
3601       *-*-aix*) conftest_s='    .machine "pwr6"
3602         .csect .text[[PR]]
3603         cmpb 3,4,5';;
3604       *) conftest_s='   .machine power6
3605         .text
3606         cmpb 3,4,5';;
3607     esac
3608
3609     gcc_GAS_CHECK_FEATURE([compare bytes support],
3610       gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
3611       [$conftest_s],,
3612       [AC_DEFINE(HAVE_AS_CMPB, 1,
3613           [Define if your assembler supports cmpb.])])
3614
3615     case $target in
3616       *-*-aix*) conftest_s='    .machine "pwr6"
3617         .csect .text[[PR]]
3618         dadd 1,2,3';;
3619       *) conftest_s='   .machine power6
3620         .text
3621         dadd 1,2,3';;
3622     esac
3623
3624     gcc_GAS_CHECK_FEATURE([decimal float support],
3625       gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
3626       [$conftest_s],,
3627       [AC_DEFINE(HAVE_AS_DFP, 1,
3628           [Define if your assembler supports DFP instructions.])])
3629
3630     case $target in
3631       *-*-aix*) conftest_s='    .machine "pwr7"
3632         .csect .text[[PR]]
3633         lxvd2x 1,2,3';;
3634       *) conftest_s='   .machine power7
3635         .text
3636         lxvd2x 1,2,3';;
3637     esac
3638
3639     gcc_GAS_CHECK_FEATURE([vector-scalar support],
3640       gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
3641       [$conftest_s],,
3642       [AC_DEFINE(HAVE_AS_VSX, 1,
3643           [Define if your assembler supports VSX instructions.])])
3644
3645     case $target in
3646       *-*-aix*) conftest_s='    .machine "pwr7"
3647         .csect .text[[PR]]
3648         popcntd 3,3';;
3649       *) conftest_s='   .machine power7
3650         .text
3651         popcntd 3,3';;
3652     esac
3653
3654     gcc_GAS_CHECK_FEATURE([popcntd support],
3655       gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
3656       [$conftest_s],,
3657       [AC_DEFINE(HAVE_AS_POPCNTD, 1,
3658           [Define if your assembler supports POPCNTD instructions.])])
3659
3660     case $target in
3661       *-*-aix*) conftest_s='    .csect .text[[PR]]
3662         lwsync';;
3663       *) conftest_s='   .text
3664         lwsync';;
3665     esac
3666
3667     gcc_GAS_CHECK_FEATURE([lwsync support],
3668       gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
3669       [$conftest_s],,
3670       [AC_DEFINE(HAVE_AS_LWSYNC, 1,
3671           [Define if your assembler supports LWSYNC instructions.])])
3672
3673     case $target in
3674       *-*-aix*) conftest_s='    .machine "476"
3675         .csect .text[[PR]]
3676         dci 0';;
3677       *) conftest_s='   .machine "476"
3678         .text
3679         dci 0';;
3680     esac
3681
3682     gcc_GAS_CHECK_FEATURE([data cache invalidate support],
3683       gcc_cv_as_powerpc_dci, [9,99,0], -a32,
3684       [$conftest_s],,
3685       [AC_DEFINE(HAVE_AS_DCI, 1,
3686           [Define if your assembler supports the DCI/ICI instructions.])])
3687
3688     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3689       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
3690       [.gnu_attribute 4,1],,
3691       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3692           [Define if your assembler supports .gnu_attribute.])])
3693
3694     gcc_GAS_CHECK_FEATURE([tls marker support],
3695       gcc_cv_as_powerpc_tls_markers, [2,20,0],,
3696       [ bl __tls_get_addr(x@tlsgd)],,
3697       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
3698           [Define if your assembler supports arg info for __tls_get_addr.])])
3699
3700     case $target in
3701       *-*-aix*)
3702         gcc_GAS_CHECK_FEATURE([.ref support],
3703           gcc_cv_as_aix_ref, [2.21.0],,
3704           [     .csect stuff[[rw]]
3705              stuff:
3706                 .long 1
3707                 .extern sym
3708                 .ref sym
3709           ],,
3710           [AC_DEFINE(HAVE_AS_REF, 1,
3711             [Define if your assembler supports .ref])])
3712         ;;
3713     esac
3714     ;;
3715
3716   mips*-*-*)
3717     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3718       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
3719 [       lw $4,%gp_rel(foo)($4)],,
3720       [if test x$target_cpu_default = x
3721        then target_cpu_default=MASK_EXPLICIT_RELOCS
3722        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
3723        fi])
3724     gcc_GAS_CHECK_FEATURE([-mno-shared support],
3725       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
3726       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
3727                  [Define if the assembler understands -mno-shared.])])
3728
3729     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3730       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
3731       [.gnu_attribute 4,1],,
3732       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3733           [Define if your assembler supports .gnu_attribute.])])
3734
3735     gcc_GAS_CHECK_FEATURE([.dtprelword support],
3736       gcc_cv_as_mips_dtprelword, [2,18,0],,
3737       [.section .tdata,"awT",@progbits
3738 x:
3739         .word 2
3740         .text
3741         .dtprelword x+0x8000],,
3742       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
3743           [Define if your assembler supports .dtprelword.])])
3744
3745     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
3746       gcc_cv_as_mips_dspr1_mult,,,
3747 [       .set    mips32r2
3748         .set    nodspr2
3749         .set    dsp
3750         madd    $ac3,$4,$5
3751         maddu   $ac3,$4,$5
3752         msub    $ac3,$4,$5
3753         msubu   $ac3,$4,$5
3754         mult    $ac3,$4,$5
3755         multu   $ac3,$4,$5],,
3756       [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
3757           [Define if your assembler supports DSPR1 mult.])])
3758
3759     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
3760     gcc_cv_as_ld_jalr_reloc=no
3761     if test $gcc_cv_as_mips_explicit_relocs = yes; then
3762       if test $in_tree_ld = yes ; then
3763         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
3764            && test $in_tree_ld_is_elf = yes; then
3765           gcc_cv_as_ld_jalr_reloc=yes
3766         fi
3767       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
3768         echo '  .ent x' > conftest.s
3769         echo 'x:        ld $2,%got_disp(y)($3)' >> conftest.s
3770         echo '  ld $25,%call16(y)($28)' >> conftest.s
3771         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
3772         echo '1:        jalr $25' >> conftest.s
3773         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
3774         echo '1:        jalr $25' >> conftest.s
3775         echo '  .end x' >> conftest.s
3776         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
3777            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
3778           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
3779              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
3780             gcc_cv_as_ld_jalr_reloc=yes
3781           fi
3782         fi
3783         rm -f conftest.*
3784       fi
3785     fi
3786     if test $gcc_cv_as_ld_jalr_reloc = yes; then
3787       if test x$target_cpu_default = x; then
3788         target_cpu_default=MASK_RELAX_PIC_CALLS
3789       else
3790         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
3791       fi
3792     fi
3793     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
3794
3795     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
3796       [gcc_cv_ld_mips_personality_relaxation],
3797       [gcc_cv_ld_mips_personality_relaxation=no
3798        if test $in_tree_ld = yes ; then
3799          if test "$gcc_cv_gld_major_version" -eq 2 \
3800                  -a "$gcc_cv_gld_minor_version" -ge 21 \
3801                  -o "$gcc_cv_gld_major_version" -gt 2; then
3802            gcc_cv_ld_mips_personality_relaxation=yes
3803          fi
3804        elif test x$gcc_cv_as != x \
3805                  -a x$gcc_cv_ld != x \
3806                  -a x$gcc_cv_readelf != x ; then
3807          cat > conftest.s <<EOF
3808         .cfi_startproc
3809         .cfi_personality 0x80,indirect_ptr
3810         .ent test
3811 test:
3812         nop
3813         .end test
3814         .cfi_endproc
3815
3816         .section .data,"aw",@progbits
3817 indirect_ptr:
3818         .dc.a personality
3819 EOF
3820          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
3821             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
3822            if $gcc_cv_readelf -d conftest 2>&1 \
3823               | grep TEXTREL > /dev/null 2>&1; then
3824              :
3825            elif $gcc_cv_readelf --relocs conftest 2>&1 \
3826                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
3827              :
3828            else
3829              gcc_cv_ld_mips_personality_relaxation=yes
3830            fi
3831          fi
3832        fi
3833        rm -f conftest.s conftest.o conftest])
3834     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
3835             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
3836       [Define if your linker can relax absolute .eh_frame personality
3837 pointers into PC-relative form.])
3838     fi
3839     ;;
3840 esac
3841
3842 # Mips and HP-UX need the GNU assembler.
3843 # Linux on IA64 might be able to use the Intel assembler.
3844
3845 case "$target" in
3846   mips*-*-* | *-*-hpux* )
3847     if test x$gas_flag = xyes \
3848        || test x"$host" != x"$build" \
3849        || test ! -x "$gcc_cv_as" \
3850        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
3851       :
3852     else
3853       echo "*** This configuration requires the GNU assembler" >&2
3854       exit 1
3855     fi
3856     ;;
3857 esac
3858
3859 # ??? Not all targets support dwarf2 debug_line, even within a version
3860 # of gas.  Moreover, we need to emit a valid instruction to trigger any
3861 # info to the output file.  So, as supported targets are added to gas 2.11,
3862 # add some instruction here to (also) show we expect this might work.
3863 # ??? Once 2.11 is released, probably need to add first known working
3864 # version to the per-target configury.
3865 case "$cpu_type" in
3866   alpha | arm | avr | bfin | cris | i386 | m32c | m68k | microblaze | mips \
3867   | pa | rs6000 | score | sparc | spu | xstormy16 | xtensa)
3868     insn="nop"
3869     ;;
3870   ia64 | s390)
3871     insn="nop 0"
3872     ;;
3873   mmix)
3874     insn="swym 0"
3875     ;;
3876 esac
3877 if test x"$insn" != x; then
3878  conftest_s="\
3879         .file 1 \"conftest.s\"
3880         .loc 1 3 0
3881         $insn"
3882  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
3883   gcc_cv_as_dwarf2_debug_line,
3884   [elf,2,11,0],, [$conftest_s],
3885   [if test x$gcc_cv_objdump != x \
3886    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
3887       | grep debug_line > /dev/null 2>&1; then
3888      gcc_cv_as_dwarf2_debug_line=yes
3889    fi])
3890
3891 # The .debug_line file table must be in the exact order that
3892 # we specified the files, since these indices are also used
3893 # by DW_AT_decl_file.  Approximate this test by testing if
3894 # the assembler bitches if the same index is assigned twice.
3895  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
3896   gcc_cv_as_dwarf2_file_buggy,,,
3897 [       .file 1 "foo.s"
3898         .file 1 "bar.s"])
3899
3900  if test $gcc_cv_as_dwarf2_debug_line = yes \
3901  && test $gcc_cv_as_dwarf2_file_buggy = no; then
3902         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
3903   [Define if your assembler supports dwarf2 .file/.loc directives,
3904    and preserves file table indices exactly as given.])
3905  fi
3906
3907  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
3908   gcc_cv_as_gdwarf2_flag,
3909   [elf,2,11,0], [--gdwarf2], [$insn],,
3910   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
3911 [Define if your assembler supports the --gdwarf2 option.])])
3912
3913  gcc_GAS_CHECK_FEATURE([--gstabs option],
3914   gcc_cv_as_gstabs_flag,
3915   [elf,2,11,0], [--gstabs], [$insn],
3916   [# The native Solaris 9/Intel assembler doesn't understand --gstabs
3917    # and warns about it, but still exits successfully.  So check for
3918    # this.
3919    if AC_TRY_COMMAND([$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null])
3920    then :
3921    else gcc_cv_as_gstabs_flag=yes
3922    fi],
3923   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
3924 [Define if your assembler supports the --gstabs option.])])
3925
3926  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
3927   gcc_cv_as_debug_prefix_map_flag,
3928   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
3929   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
3930 [Define if your assembler supports the --debug-prefix-map option.])])
3931 fi
3932
3933 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
3934  ,,
3935 [.lcomm bar,4,16],,
3936 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
3937   [Define if your assembler supports .lcomm with an alignment field.])])
3938
3939 AC_ARG_ENABLE(gnu-unique-object,
3940  [AS_HELP_STRING([--enable-gnu-unique-object],
3941    [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
3942  [case $enable_gnu_unique_object in
3943     yes | no) ;;
3944     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
3945 Valid choices are 'yes' and 'no'.]) ;;
3946   esac],
3947  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
3948    [elf,2,19,52],,
3949    [.type foo, @gnu_unique_object],,
3950 # Also check for ld.so support, i.e. glibc 2.11 or higher.
3951    [[if test x$host = x$build -a x$host = x$target &&
3952        ldd --version 2>/dev/null &&
3953        glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
3954       glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
3955       glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`
3956       glibcnum=`expr $glibcmajor \* 1000 + $glibcminor`
3957       if test "$glibcnum" -ge 2011 ; then
3958         enable_gnu_unique_object=yes
3959       fi
3960     fi]])])
3961 if test x$enable_gnu_unique_object = xyes; then
3962   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
3963    [Define if your assembler supports @gnu_unique_object.])
3964 fi
3965
3966 AC_CACHE_CHECK([assembler for tolerance to line number 0],
3967  [gcc_cv_as_line_zero],
3968  [gcc_cv_as_line_zero=no
3969   if test $in_tree_gas = yes; then
3970     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
3971   elif test "x$gcc_cv_as" != x; then
3972     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
3973     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
3974        test "x`cat conftest.out`" = x
3975     then
3976       gcc_cv_as_line_zero=yes
3977     else
3978       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
3979       cat conftest.s >&AS_MESSAGE_LOG_FD
3980       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
3981       cat conftest.out >&AS_MESSAGE_LOG_FD
3982     fi
3983     rm -f conftest.o conftest.s conftest.out
3984   fi])
3985 if test "x$gcc_cv_as_line_zero" = xyes; then
3986   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
3987 [Define if the assembler won't complain about a line such as # 0 "" 2.])
3988 fi
3989
3990 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
3991 gcc_cv_ld_eh_frame_hdr=no
3992 if test $in_tree_ld = yes ; then
3993   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
3994      && test $in_tree_ld_is_elf = yes; then
3995     gcc_cv_ld_eh_frame_hdr=yes
3996   fi
3997 elif test x$gcc_cv_ld != x; then
3998   if echo "$ld_ver" | grep GNU > /dev/null; then
3999     # Check if linker supports --eh-frame-hdr option
4000     if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
4001       gcc_cv_ld_eh_frame_hdr=yes
4002     fi
4003   else
4004     case "$target" in
4005       *-*-solaris2*)
4006         # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
4007         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
4008           gcc_cv_ld_eh_frame_hdr=yes
4009         fi
4010         ;;
4011     esac
4012   fi
4013 fi
4014 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
4015 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
4016         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
4017 [Define if your linker supports .eh_frame_hdr.])
4018 fi
4019 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
4020
4021 AC_MSG_CHECKING(linker position independent executable support)
4022 gcc_cv_ld_pie=no
4023 if test $in_tree_ld = yes ; then
4024   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
4025      && test $in_tree_ld_is_elf = yes; then
4026     gcc_cv_ld_pie=yes
4027   fi
4028 elif test x$gcc_cv_ld != x; then
4029         # Check if linker supports -pie option
4030         if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
4031                 gcc_cv_ld_pie=yes
4032         fi
4033 fi
4034 if test x"$gcc_cv_ld_pie" = xyes; then
4035         AC_DEFINE(HAVE_LD_PIE, 1,
4036 [Define if your linker supports -pie option.])
4037 fi
4038 AC_MSG_RESULT($gcc_cv_ld_pie)
4039
4040 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
4041 gcc_cv_ld_eh_gc_sections=no
4042 if test $in_tree_ld = yes ; then
4043   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
4044      && test $in_tree_ld_is_elf = yes; then
4045     gcc_cv_ld_eh_gc_sections=yes
4046   fi
4047 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
4048   cat > conftest.s <<EOF
4049         .section        .text
4050 .globl _start
4051         .type _start, @function
4052 _start:
4053         .long foo
4054         .size _start, .-_start
4055         .section        .text.foo,"ax",@progbits
4056         .type foo, @function
4057 foo:
4058         .long 0
4059         .size foo, .-foo
4060         .section        .gcc_except_table.foo,"a",@progbits
4061 .L0:
4062         .long 0
4063         .section        .eh_frame,"a",@progbits
4064         .long .L0
4065 EOF
4066   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4067     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4068          | grep "gc-sections option ignored" > /dev/null; then
4069       gcc_cv_ld_eh_gc_sections=no
4070     elif $gcc_cv_objdump -h conftest 2> /dev/null \
4071          | grep gcc_except_table > /dev/null; then
4072       gcc_cv_ld_eh_gc_sections=yes
4073       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
4074       if test x$gcc_cv_as_comdat_group != xyes; then
4075         gcc_cv_ld_eh_gc_sections=no
4076         cat > conftest.s <<EOF
4077         .section        .text
4078 .globl _start
4079         .type _start, @function
4080 _start:
4081         .long foo
4082         .size _start, .-_start
4083         .section        .gnu.linkonce.t.foo,"ax",@progbits
4084         .type foo, @function
4085 foo:
4086         .long 0
4087         .size foo, .-foo
4088         .section        .gcc_except_table.foo,"a",@progbits
4089 .L0:
4090         .long 0
4091         .section        .eh_frame,"a",@progbits
4092         .long .L0
4093 EOF
4094         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4095           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4096                | grep "gc-sections option ignored" > /dev/null; then
4097             gcc_cv_ld_eh_gc_sections=no
4098           elif $gcc_cv_objdump -h conftest 2> /dev/null \
4099                | grep gcc_except_table > /dev/null; then
4100             gcc_cv_ld_eh_gc_sections=yes
4101           fi
4102         fi
4103       fi
4104     fi
4105   fi
4106   rm -f conftest.s conftest.o conftest
4107 fi
4108 case "$target" in
4109   hppa*-*-linux*)
4110     # ??? This apparently exposes a binutils bug with PC-relative relocations.
4111     gcc_cv_ld_eh_gc_sections=no
4112     ;;
4113 esac
4114 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
4115         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
4116   [Define if your linker supports garbage collection of
4117    sections in presence of EH frames.])
4118 fi
4119 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
4120
4121 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
4122 gcc_cv_ld_eh_gc_sections_bug=no
4123 if test $in_tree_ld = yes ; then
4124   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
4125      && test $in_tree_ld_is_elf = yes; then
4126     gcc_cv_ld_eh_gc_sections_bug=yes
4127   fi
4128 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x -a x$gcc_cv_as_comdat_group = xyes; then
4129   gcc_cv_ld_eh_gc_sections_bug=yes
4130   cat > conftest.s <<EOF
4131         .section        .text
4132 .globl _start
4133         .type _start, @function
4134 _start:
4135         .long foo
4136         .size _start, .-_start
4137         .section        .text.startup.foo,"ax",@progbits
4138         .type foo, @function
4139 foo:
4140         .long 0
4141         .size foo, .-foo
4142         .section        .gcc_except_table.foo,"a",@progbits
4143 .L0:
4144         .long 0
4145         .section        .eh_frame,"a",@progbits
4146         .long .L0
4147 EOF
4148   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4149     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4150          | grep "gc-sections option ignored" > /dev/null; then
4151       :
4152     elif $gcc_cv_objdump -h conftest 2> /dev/null \
4153          | grep gcc_except_table > /dev/null; then
4154       gcc_cv_ld_eh_gc_sections_bug=no
4155     fi
4156   fi
4157   rm -f conftest.s conftest.o conftest
4158 fi
4159 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
4160         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
4161   [Define if your linker has buggy garbage collection of
4162    sections support when .text.startup.foo like sections are used.])
4163 fi
4164 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
4165
4166 # --------
4167 # UNSORTED
4168 # --------
4169
4170 AC_CACHE_CHECK(linker --as-needed support,
4171 gcc_cv_ld_as_needed,
4172 [gcc_cv_ld_as_needed=no
4173 if test $in_tree_ld = yes ; then
4174   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4175      && test $in_tree_ld_is_elf = yes; then
4176     gcc_cv_ld_as_needed=yes
4177   fi
4178 elif test x$gcc_cv_ld != x; then
4179         # Check if linker supports --as-needed and --no-as-needed options
4180         if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
4181                 gcc_cv_ld_as_needed=yes
4182         fi
4183 fi
4184 ])
4185 if test x"$gcc_cv_ld_as_needed" = xyes; then
4186         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
4187 [Define if your linker supports --as-needed and --no-as-needed options.])
4188 fi
4189
4190 case "$target:$tm_file" in
4191   powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
4192     AC_CACHE_CHECK(linker support for omitting dot symbols,
4193     gcc_cv_ld_no_dot_syms,
4194     [gcc_cv_ld_no_dot_syms=no
4195     if test $in_tree_ld = yes ; then
4196       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
4197         gcc_cv_ld_no_dot_syms=yes
4198       fi
4199     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4200       cat > conftest1.s <<EOF
4201         .text
4202         bl .foo
4203 EOF
4204       cat > conftest2.s <<EOF
4205         .section ".opd","aw"
4206         .align 3
4207         .globl foo
4208         .type foo,@function
4209 foo:
4210         .quad .LEfoo,.TOC.@tocbase,0
4211         .text
4212 .LEfoo:
4213         blr
4214         .size foo,.-.LEfoo
4215 EOF
4216       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
4217          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
4218          && $gcc_cv_ld -melf64ppc -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
4219         gcc_cv_ld_no_dot_syms=yes
4220       fi
4221       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
4222     fi
4223     ])
4224     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
4225       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
4226     [Define if your PowerPC64 linker only needs function descriptor syms.])
4227     fi
4228
4229     AC_CACHE_CHECK(linker large toc support,
4230     gcc_cv_ld_large_toc,
4231     [gcc_cv_ld_large_toc=no
4232     if test $in_tree_ld = yes ; then
4233       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
4234         gcc_cv_ld_large_toc=yes
4235       fi
4236     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4237       cat > conftest.s <<EOF
4238         .section ".tbss","awT",@nobits
4239         .align 3
4240 ie0:    .space 8
4241         .global _start
4242         .text
4243 _start:
4244         addis 9,13,ie0@got@tprel@ha
4245         ld 9,ie0@got@tprel@l(9)
4246 EOF
4247       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
4248          && $gcc_cv_ld -melf64ppc --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
4249         gcc_cv_ld_large_toc=yes
4250       fi
4251       rm -f conftest conftest.o conftest.s
4252     fi
4253     ])
4254     if test x"$gcc_cv_ld_large_toc" = xyes; then
4255       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
4256     [Define if your PowerPC64 linker supports a large TOC.])
4257     fi
4258     ;;
4259 esac
4260
4261 AC_CACHE_CHECK(linker --build-id support,
4262   gcc_cv_ld_buildid,
4263   [gcc_cv_ld_buildid=no
4264   if test $in_tree_ld = yes ; then
4265     if test "$gcc_cv_gld_major_version" -eq 2 -a \
4266        "$gcc_cv_gld_minor_version" -ge 18 -o \
4267        "$gcc_cv_gld_major_version" -gt 2 \
4268        && test $in_tree_ld_is_elf = yes; then
4269       gcc_cv_ld_buildid=yes
4270     fi
4271   elif test x$gcc_cv_ld != x; then
4272     if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
4273       gcc_cv_ld_buildid=yes
4274     fi
4275   fi])
4276 if test x"$gcc_cv_ld_buildid" = xyes; then
4277   AC_DEFINE(HAVE_LD_BUILDID, 1,
4278   [Define if your linker supports --build-id.])
4279 fi
4280
4281 AC_ARG_ENABLE(linker-build-id,
4282 [  --enable-linker-build-id
4283                           compiler will always pass --build-id to linker],
4284 [],
4285 enable_linker_build_id=no)
4286
4287 if test x"$enable_linker_build_id" = xyes; then
4288   if test x"$gcc_cv_ld_buildid" = xyes; then
4289     AC_DEFINE(ENABLE_LD_BUILDID, 1,
4290     [Define if gcc should always pass --build-id to linker.])
4291   else
4292     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
4293   fi
4294 fi
4295
4296 # In binutils 2.21, GNU ld gained support for new emulations fully
4297 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
4298 AC_CACHE_CHECK(linker *_sol2 emulation support,
4299   gcc_cv_ld_sol2_emulation,
4300   [gcc_cv_ld_sol2_emulation=no
4301   if test $in_tree_ld = yes ; then
4302     if test "$gcc_cv_gld_major_version" -eq 2 -a \
4303        "$gcc_cv_gld_minor_version" -ge 21 -o \
4304        "$gcc_cv_gld_major_version" -gt 2 \
4305        && test $in_tree_ld_is_elf = yes; then
4306       gcc_cv_ld_sol2_emulation=yes
4307     fi
4308   elif test x$gcc_cv_ld != x; then
4309     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
4310        grep _sol2 > /dev/null; then
4311       gcc_cv_ld_sol2_emulation=yes
4312     fi
4313   fi])
4314 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
4315   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
4316   [Define if your linker supports the *_sol2 emulations.])
4317 fi
4318
4319 AC_CACHE_CHECK(linker --sysroot support,
4320   gcc_cv_ld_sysroot,
4321   [gcc_cv_ld_sysroot=no
4322   if test $in_tree_ld = yes ; then
4323       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
4324         gcc_cv_ld_sysroot=yes
4325       fi
4326   elif test x$gcc_cv_ld != x; then
4327     if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
4328       gcc_cv_ld_sysroot=yes
4329     fi
4330   fi])
4331 if test x"$gcc_cv_ld_sysroot" = xyes; then
4332   AC_DEFINE(HAVE_LD_SYSROOT, 1,
4333   [Define if your linker supports --sysroot.])
4334 fi
4335
4336 if test x$with_sysroot = x && test x$host = x$target \
4337    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4338    && test "$prefix" != "NONE"; then
4339   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4340 [Define to PREFIX/include if cpp should also search that directory.])
4341 fi
4342
4343 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4344   if test "x$with_headers" != x; then
4345     target_header_dir=$with_headers
4346   elif test "x$with_sysroot" = x; then
4347     target_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
4348   elif test "x$with_build_sysroot" != "x"; then
4349     target_header_dir="${with_build_sysroot}/usr/include"
4350   elif test "x$with_sysroot" = xyes; then
4351     target_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
4352   else
4353     target_header_dir="${with_sysroot}/usr/include"
4354   fi
4355 else
4356   target_header_dir=/usr/include
4357 fi
4358
4359 # Test for stack protector support in target C library.
4360 AC_CACHE_CHECK(__stack_chk_fail in target C library,
4361       gcc_cv_libc_provides_ssp,
4362       [gcc_cv_libc_provides_ssp=no
4363     case "$target" in
4364        *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
4365       [# glibc 2.4 and later provides __stack_chk_fail and
4366       # either __stack_chk_guard, or TLS access to stack guard canary.
4367       if test -f $target_header_dir/features.h \
4368          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
4369             $target_header_dir/features.h > /dev/null; then
4370         if $EGREP '^[   ]*#[    ]*define[       ]+__GLIBC__[    ]+([1-9][0-9]|[3-9])' \
4371            $target_header_dir/features.h > /dev/null; then
4372           gcc_cv_libc_provides_ssp=yes
4373         elif $EGREP '^[         ]*#[    ]*define[       ]+__GLIBC__[    ]+2' \
4374              $target_header_dir/features.h > /dev/null \
4375              && $EGREP '^[      ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+([1-9][0-9]|[4-9])' \
4376              $target_header_dir/features.h > /dev/null; then
4377           gcc_cv_libc_provides_ssp=yes
4378         elif $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
4379              $target_header_dir/features.h > /dev/null && \
4380              test -f $target_header_dir/bits/uClibc_config.h && \
4381              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
4382              $target_header_dir/bits/uClibc_config.h > /dev/null; then
4383           gcc_cv_libc_provides_ssp=yes
4384         fi
4385       fi]
4386         ;;
4387        *-*-gnu*)
4388          # Avoid complicated tests (see
4389          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
4390          # simply assert that glibc does provide this, which is true for all
4391          # realistically usable GNU/Hurd configurations.
4392          gcc_cv_libc_provides_ssp=yes;;
4393        *-*-darwin* | *-*-freebsd*)
4394          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
4395            [echo "no __stack_chk_fail on this target"])
4396         ;;
4397   *) gcc_cv_libc_provides_ssp=no ;;
4398     esac])
4399
4400 if test x$gcc_cv_libc_provides_ssp = xyes; then
4401   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
4402             [Define if your target C library provides stack protector support])
4403 fi
4404
4405 # Test for <sys/sdt.h> on the target.
4406 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
4407 AC_MSG_CHECKING(sys/sdt.h in the target C library)
4408 have_sys_sdt_h=no
4409 if test -f $target_header_dir/sys/sdt.h; then
4410   AC_DEFINE(HAVE_SYS_SDT_H, 1,
4411             [Define if your target C library provides sys/sdt.h])
4412 fi
4413 AC_MSG_RESULT($have_sys_sdt_h)
4414
4415 # Check if TFmode long double should be used by default or not.
4416 # Some glibc targets used DFmode long double, but with glibc 2.4
4417 # and later they can use TFmode.
4418 case "$target" in
4419   powerpc*-*-linux* | \
4420   powerpc*-*-gnu* | \
4421   sparc*-*-linux* | \
4422   s390*-*-linux* | \
4423   alpha*-*-linux*)
4424     AC_ARG_WITH(long-double-128,
4425 [  --with-long-double-128  Use 128-bit long double by default.],
4426       gcc_cv_target_ldbl128="$with_long_double_128",
4427       [[gcc_cv_target_ldbl128=no
4428       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
4429         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
4430       && gcc_cv_target_ldbl128=yes
4431       ]])
4432     ;;
4433 esac
4434 if test x$gcc_cv_target_ldbl128 = xyes; then
4435   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
4436             [Define if TFmode long double should be the default])
4437 fi
4438
4439 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
4440 gcc_cv_target_dl_iterate_phdr=unknown
4441 case "$target" in
4442   *-*-solaris2*)
4443     # <link.h> needs both a dl_iterate_phdr declaration and support for
4444     # compilation with largefile support.
4445     if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
4446       && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
4447       gcc_cv_target_dl_iterate_phdr=yes
4448     else
4449       gcc_cv_target_dl_iterate_phdr=no
4450     fi
4451     ;;
4452 esac
4453 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
4454 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
4455    AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
4456 [Define if your target C library provides the `dl_iterate_phdr' function.])
4457 fi
4458 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
4459
4460 # Find out what GC implementation we want, or may, use.
4461 AC_ARG_WITH(gc,
4462 [  --with-gc={page,zone}   choose the garbage collection mechanism to use
4463                           with the compiler],
4464 [case "$withval" in
4465   page)
4466     GGC=ggc-$withval
4467     ;;
4468   zone)
4469     GGC=ggc-$withval
4470     AC_DEFINE(GGC_ZONE, 1, [Define if the zone collector is in use])
4471     ;;
4472   *)
4473     AC_MSG_ERROR([$withval is an invalid option to --with-gc])
4474     ;;
4475 esac],
4476 [GGC=ggc-page])
4477 AC_SUBST(GGC)
4478 echo "Using $GGC for garbage collection."
4479
4480 # Libraries to use on the host.  This will normally be set by the top
4481 # level Makefile.  Here we simply capture the value for our Makefile.
4482 if test -z "${HOST_LIBS+set}"; then
4483   HOST_LIBS=
4484 fi
4485 AC_SUBST(HOST_LIBS)
4486
4487 # Use the system's zlib library.
4488 zlibdir=-L../zlib
4489 zlibinc="-I\$(srcdir)/../zlib"
4490 AC_ARG_WITH(system-zlib,
4491 [  --with-system-zlib      use installed libz],
4492 zlibdir=
4493 zlibinc=
4494 )
4495 AC_SUBST(zlibdir)
4496 AC_SUBST(zlibinc)
4497
4498 dnl Very limited version of automake's enable-maintainer-mode
4499
4500 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
4501   dnl maintainer-mode is disabled by default
4502   AC_ARG_ENABLE(maintainer-mode,
4503 [  --enable-maintainer-mode
4504                           enable make rules and dependencies not useful
4505                           (and sometimes confusing) to the casual installer],
4506       maintainer_mode=$enableval,
4507       maintainer_mode=no)
4508
4509 AC_MSG_RESULT($maintainer_mode)
4510
4511 if test "$maintainer_mode" = "yes"; then
4512   MAINT=''
4513 else
4514   MAINT='#'
4515 fi
4516 AC_SUBST(MAINT)dnl
4517
4518 # --------------
4519 # Language hooks
4520 # --------------
4521
4522 # Make empty files to contain the specs and options for each language.
4523 # Then add #include lines to for a compiler that has specs and/or options.
4524
4525 subdirs=
4526 lang_opt_files=
4527 lang_specs_files=
4528 lang_tree_files=
4529 # These (without "all_") are set in each config-lang.in.
4530 # `language' must be a single word so is spelled singularly.
4531 all_languages=
4532 all_compilers=
4533 all_outputs='Makefile'
4534 # List of language makefile fragments.
4535 all_lang_makefrags=
4536 # Additional files for gengtype
4537 all_gtfiles="$target_gtfiles"
4538
4539 # These are the languages that are set in --enable-languages,
4540 # and are available in the GCC tree.
4541 all_selected_languages=
4542
4543 # Add the language fragments.
4544 # Languages are added via two mechanisms.  Some information must be
4545 # recorded in makefile variables, these are defined in config-lang.in.
4546 # We accumulate them and plug them into the main Makefile.
4547 # The other mechanism is a set of hooks for each of the main targets
4548 # like `clean', `install', etc.
4549
4550 language_hooks="Make-hooks"
4551
4552 for lang in ${srcdir}/*/config-lang.in
4553 do
4554 changequote(,)dnl
4555         test "$lang" = "${srcdir}/*/config-lang.in" && continue
4556
4557         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
4558         if test "x$lang_alias" = x
4559         then
4560               echo "$lang doesn't set \$language." 1>&2
4561               exit 1
4562         fi
4563         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
4564         subdirs="$subdirs $subdir"
4565
4566         # $gcc_subdir is where the gcc integration files are to be found
4567         # for a language, both for internal compiler purposes (compiler
4568         # sources implementing front-end to GCC tree converters), and for
4569         # build infrastructure purposes (Make-lang.in, etc.)
4570         #
4571         # This will be <subdir> (relative to $srcdir) if a line like
4572         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
4573         # is found in <langdir>/config-lang.in, and will remain <langdir>
4574         # otherwise.
4575         #
4576         # Except for the language alias (fetched above), the regular
4577         # "config-lang.in" contents are always retrieved from $gcc_subdir,
4578         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
4579         # only this and the language alias.
4580
4581         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
4582         if [ "$gcc_subdir" = "" ]; then
4583            gcc_subdir="$subdir"
4584         fi
4585
4586         case ",$enable_languages," in
4587         *,$lang_alias,*)
4588             all_selected_languages="$all_selected_languages $lang_alias"
4589             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
4590                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
4591             fi
4592             ;;
4593         esac
4594 changequote([,])dnl
4595
4596         language=
4597         boot_language=
4598         compilers=
4599         outputs=
4600         gtfiles=
4601         subdir_requires=
4602         . ${srcdir}/$gcc_subdir/config-lang.in
4603         if test "x$language" = x
4604         then
4605                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
4606                 exit 1
4607         fi
4608
4609         ok=:
4610         case ",$enable_languages," in
4611                 *,$lang_alias,*) ;;
4612                 *)
4613                         for i in $subdir_requires; do
4614                                 test -f "${srcdir}/$i/config-lang.in" && continue
4615                                 ok=false
4616                                 break
4617                         done
4618                 ;;
4619         esac
4620         $ok || continue
4621
4622         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
4623         if test -f $srcdir/$gcc_subdir/lang.opt; then
4624             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
4625             all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
4626         fi
4627         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
4628             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
4629         fi
4630         all_languages="$all_languages $language"
4631         all_compilers="$all_compilers $compilers"
4632         all_outputs="$all_outputs $outputs"
4633         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
4634         case ",$enable_languages," in
4635                 *,lto,*)
4636                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
4637                     enable_lto=yes
4638                     AC_SUBST(enable_lto)
4639                     ;;
4640                 *) ;;
4641         esac
4642 done
4643
4644 # Pick up gtfiles for c
4645 gtfiles=
4646 . ${srcdir}/c-config-lang.in
4647 all_gtfiles="$all_gtfiles [[c]] $gtfiles"
4648
4649 check_languages=
4650 for language in $all_selected_languages
4651 do
4652         check_languages="$check_languages check-$language"
4653 done
4654
4655 # We link each language in with a set of hooks, reached indirectly via
4656 # lang.${target}.  Only do so for selected languages.
4657
4658 rm -f Make-hooks
4659 touch Make-hooks
4660 target_list="all.cross start.encap rest.encap tags \
4661         install-common install-man install-info install-pdf install-html dvi \
4662         pdf html uninstall info man srcextra srcman srcinfo \
4663         mostlyclean clean distclean maintainer-clean install-plugin"
4664
4665 for t in $target_list
4666 do
4667         x=
4668         for lang in $all_selected_languages
4669         do
4670                 x="$x $lang.$t"
4671         done
4672         echo "lang.$t: $x" >> Make-hooks
4673 done
4674
4675 # --------
4676 # Option include files
4677 # --------
4678
4679 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
4680 option_includes="option-includes.mk"
4681 AC_SUBST_FILE(option_includes)
4682
4683 # --------
4684 # UNSORTED
4685 # --------
4686
4687 # Create .gdbinit.
4688
4689 echo "dir ." > .gdbinit
4690 echo "dir ${srcdir}" >> .gdbinit
4691 if test x$gdb_needs_out_file_path = xyes
4692 then
4693         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
4694 fi
4695 if test "x$subdirs" != x; then
4696         for s in $subdirs
4697         do
4698                 echo "dir ${srcdir}/$s" >> .gdbinit
4699         done
4700 fi
4701 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
4702
4703 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
4704 AC_SUBST(gcc_tooldir)
4705 AC_SUBST(dollar)
4706
4707 # Find a directory in which to install a shared libgcc.
4708
4709 AC_ARG_ENABLE(version-specific-runtime-libs,
4710 [  --enable-version-specific-runtime-libs
4711                           specify that runtime libraries should be
4712                           installed in a compiler-specific directory])
4713
4714 AC_ARG_WITH(slibdir,
4715 [  --with-slibdir=DIR      shared libraries in DIR [[LIBDIR]]],
4716 slibdir="$with_slibdir",
4717 if test "${enable_version_specific_runtime_libs+set}" = set; then
4718   slibdir='$(libsubdir)'
4719 elif test "$host" != "$target"; then
4720   slibdir='$(build_tooldir)/lib'
4721 else
4722   slibdir='$(libdir)'
4723 fi)
4724 AC_SUBST(slibdir)
4725
4726 # Substitute configuration variables
4727 AC_SUBST(subdirs)
4728 AC_SUBST(srcdir)
4729 AC_SUBST(all_compilers)
4730 AC_SUBST(all_gtfiles)
4731 AC_SUBST(all_lang_makefrags)
4732 AC_SUBST(all_languages)
4733 AC_SUBST(all_selected_languages)
4734 AC_SUBST(build_exeext)
4735 AC_SUBST(build_install_headers_dir)
4736 AC_SUBST(build_xm_file_list)
4737 AC_SUBST(build_xm_include_list)
4738 AC_SUBST(build_xm_defines)
4739 AC_SUBST(build_file_translate)
4740 AC_SUBST(check_languages)
4741 AC_SUBST(cpp_install_dir)
4742 AC_SUBST(xmake_file)
4743 AC_SUBST(tmake_file)
4744 AC_SUBST(TM_ENDIAN_CONFIG)
4745 AC_SUBST(TM_MULTILIB_CONFIG)
4746 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
4747 AC_SUBST(extra_gcc_objs)
4748 AC_SUBST(user_headers_inc_next_pre)
4749 AC_SUBST(user_headers_inc_next_post)
4750 AC_SUBST(extra_headers_list)
4751 AC_SUBST(extra_objs)
4752 AC_SUBST(extra_parts)
4753 AC_SUBST(extra_passes)
4754 AC_SUBST(extra_programs)
4755 AC_SUBST(float_h_file)
4756 AC_SUBST(gcc_config_arguments)
4757 AC_SUBST(gcc_gxx_include_dir)
4758 AC_SUBST(host_exeext)
4759 AC_SUBST(host_xm_file_list)
4760 AC_SUBST(host_xm_include_list)
4761 AC_SUBST(host_xm_defines)
4762 AC_SUBST(out_host_hook_obj)
4763 AC_SUBST(install)
4764 AC_SUBST(lang_opt_files)
4765 AC_SUBST(lang_specs_files)
4766 AC_SUBST(lang_tree_files)
4767 AC_SUBST(local_prefix)
4768 AC_SUBST(md_file)
4769 AC_SUBST(objc_boehm_gc)
4770 AC_SUBST(out_file)
4771 AC_SUBST(out_object_file)
4772 AC_SUBST(thread_file)
4773 AC_SUBST(tm_file_list)
4774 AC_SUBST(tm_include_list)
4775 AC_SUBST(tm_defines)
4776 AC_SUBST(tm_p_file_list)
4777 AC_SUBST(tm_p_include_list)
4778 AC_SUBST(xm_file_list)
4779 AC_SUBST(xm_include_list)
4780 AC_SUBST(xm_defines)
4781 AC_SUBST(use_gcc_stdint)
4782 AC_SUBST(c_target_objs)
4783 AC_SUBST(cxx_target_objs)
4784 AC_SUBST(fortran_target_objs)
4785 AC_SUBST(target_cpu_default)
4786
4787 AC_SUBST_FILE(language_hooks)
4788
4789 # Echo link setup.
4790 if test x${build} = x${host} ; then
4791   if test x${host} = x${target} ; then
4792     echo "Links are now set up to build a native compiler for ${target}." 1>&2
4793   else
4794     echo "Links are now set up to build a cross-compiler" 1>&2
4795     echo " from ${host} to ${target}." 1>&2
4796   fi
4797 else
4798   if test x${host} = x${target} ; then
4799     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
4800     echo " for ${target}." 1>&2
4801   else
4802     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
4803     echo " from ${host} to ${target}." 1>&2
4804   fi
4805 fi
4806
4807 AC_ARG_VAR(GMPLIBS,[How to link GMP])
4808 AC_ARG_VAR(GMPINC,[How to find GMP include files])
4809
4810 AC_ARG_VAR(PPLLIBS,[How to link PPL])
4811 AC_ARG_VAR(PPLINC,[How to find PPL include files])
4812
4813 AC_ARG_VAR(CLOOGLIBS,[How to link CLOOG])
4814 AC_ARG_VAR(CLOOGINC,[How to find CLOOG include files])
4815 if test "x${CLOOGLIBS}" != "x" ; then
4816    AC_DEFINE(HAVE_cloog, 1, [Define if cloog is in use.])
4817 fi
4818
4819 # Check for plugin support
4820 AC_ARG_ENABLE(plugin,
4821 [  --enable-plugin         enable plugin support],
4822 enable_plugin=$enableval,
4823 enable_plugin=yes; default_plugin=yes)
4824
4825 pluginlibs=
4826
4827 case "${host}" in
4828   *-*-darwin*)
4829     if test x$build = x$host; then
4830       export_sym_check="nm${exeext} -g"
4831     elif test x$host = x$target; then
4832       export_sym_check="$gcc_cv_nm -g"
4833     else
4834       export_sym_check=
4835     fi
4836   ;;
4837   *)
4838     if test x$build = x$host; then
4839       export_sym_check="objdump${exeext} -T"
4840     elif test x$host = x$target; then
4841       export_sym_check="$gcc_cv_objdump -T"
4842     else
4843       export_sym_check=
4844     fi
4845   ;;
4846 esac
4847
4848 if test x"$enable_plugin" = x"yes"; then
4849
4850   AC_MSG_CHECKING([for exported symbols])
4851   if test "x$export_sym_check" != x; then
4852     echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
4853     ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
4854     if $export_sym_check conftest | grep foobar > /dev/null; then
4855       : # No need to use a flag
4856       AC_MSG_RESULT([yes])
4857     else
4858       AC_MSG_RESULT([yes])
4859       AC_MSG_CHECKING([for -rdynamic])
4860       ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
4861       if $export_sym_check conftest | grep foobar > /dev/null; then
4862         plugin_rdynamic=yes
4863         pluginlibs="-rdynamic"
4864       else
4865         plugin_rdynamic=no
4866         enable_plugin=no
4867       fi
4868       AC_MSG_RESULT([$plugin_rdynamic])
4869     fi
4870   else
4871     AC_MSG_RESULT([unable to check])
4872   fi
4873
4874   # Check -ldl
4875   saved_LIBS="$LIBS"
4876   AC_SEARCH_LIBS([dlopen], [dl])
4877   if test x"$ac_cv_search_dlopen" = x"-ldl"; then
4878     pluginlibs="$pluginlibs -ldl"
4879   fi
4880   LIBS="$saved_LIBS"
4881
4882   # Check that we can build shared objects with -fPIC -shared
4883   saved_LDFLAGS="$LDFLAGS"
4884   saved_CFLAGS="$CFLAGS"
4885   case "${host}" in
4886     *-*-darwin*)
4887       CFLAGS=`echo $CFLAGS | sed s/-mdynamic-no-pic//g`
4888       CFLAGS="$CFLAGS -fPIC"
4889       LDFLAGS="$LDFLAGS -shared -undefined dynamic_lookup"
4890     ;;
4891     *)
4892       CFLAGS="$CFLAGS -fPIC"
4893       LDFLAGS="$LDFLAGS -fPIC -shared"
4894     ;;
4895   esac
4896   AC_MSG_CHECKING([for -fPIC -shared])
4897   AC_TRY_LINK(
4898     [extern int X;],[return X == 0;],
4899     [AC_MSG_RESULT([yes]); have_pic_shared=yes],
4900     [AC_MSG_RESULT([no]); have_pic_shared=no])
4901   if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
4902     pluginlibs=
4903     enable_plugin=no
4904   fi
4905   LDFLAGS="$saved_LDFLAGS"
4906   CFLAGS="$saved_CFLAGS"
4907
4908   # If plugin support had been requested but not available, fail.
4909   if test x"$enable_plugin" = x"no" ; then
4910     if test x"$default_plugin" != x"yes"; then
4911       AC_MSG_ERROR([
4912 Building GCC with plugin support requires a host that supports
4913 -fPIC, -shared, -ldl and -rdynamic.])
4914     fi
4915   fi
4916 fi
4917
4918 AC_SUBST(pluginlibs)
4919 AC_SUBST(enable_plugin)
4920 if test x"$enable_plugin" = x"yes"; then
4921   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
4922 fi
4923
4924
4925 AC_ARG_ENABLE(libquadmath-support,
4926 [AS_HELP_STRING([--disable-libquadmath-support],
4927   [disable libquadmath support for Fortran])],
4928 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
4929 ENABLE_LIBQUADMATH_SUPPORT=yes)
4930 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
4931   AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
4932             [Define to 1 to enable libquadmath support])
4933 fi
4934
4935
4936 # Configure the subdirectories
4937 # AC_CONFIG_SUBDIRS($subdirs)
4938
4939 # Create the Makefile
4940 # and configure language subdirectories
4941 AC_CONFIG_FILES($all_outputs)
4942
4943 AC_CONFIG_COMMANDS([default],
4944 [
4945 case ${CONFIG_HEADERS} in
4946   *auto-host.h:config.in*)
4947   echo > cstamp-h ;;
4948 esac
4949 # Make sure all the subdirs exist.
4950 for d in $subdirs doc build c-family
4951 do
4952     test -d $d || mkdir $d
4953 done
4954 ],
4955 [subdirs='$subdirs'])
4956 AC_OUTPUT
4957