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; then
1971         # Single tree build which includes ld.  We want to prefer it
1972         # over whatever linker top-level may have detected, since
1973         # we'll use what we're building after installation anyway.
1974         AC_MSG_RESULT(newly built ld)
1975         in_tree_ld=yes
1976         in_tree_ld_is_elf=no
1977         if (grep 'EMUL = .*elf' ../ld/Makefile \
1978             || grep 'EMUL = .*linux' ../ld/Makefile \
1979             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
1980           in_tree_ld_is_elf=yes
1981         fi
1982         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
1983         do
1984 changequote(,)dnl
1985                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*\(VERSION=[0-9]*\.[0-9]*.*\)/\1/p' < $f`
1986                 if test x$gcc_cv_gld_version != x; then
1987                         break
1988                 fi
1989         done
1990         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
1991         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
1992 changequote([,])dnl
1993 else
1994         AC_MSG_RESULT($gcc_cv_ld)
1995         in_tree_ld=no
1996 fi
1997
1998 # Figure out what nm we will be using.
1999 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2000 AS_VAR_SET_IF(gcc_cv_nm,, [
2001 if test -f $gcc_cv_binutils_srcdir/configure.in \
2002      && test -f ../binutils/Makefile \
2003      && test x$build = x$host; then
2004         gcc_cv_nm=../binutils/nm-new$build_exeext
2005 elif test -x nm$build_exeext; then
2006         gcc_cv_nm=./nm$build_exeext
2007 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2008         gcc_cv_nm="$NM_FOR_TARGET"
2009 else
2010         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2011 fi])
2012
2013 AC_MSG_CHECKING(what nm to use)
2014 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2015         # Single tree build which includes binutils.
2016         AC_MSG_RESULT(newly built nm)
2017         in_tree_nm=yes
2018 else
2019         AC_MSG_RESULT($gcc_cv_nm)
2020         in_tree_nm=no
2021 fi
2022
2023 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2024 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2025 case "$ORIGINAL_NM_FOR_TARGET" in
2026   ./nm | ./nm$build_exeext) ;;
2027   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2028 esac
2029
2030
2031 # Figure out what objdump we will be using.
2032 AS_VAR_SET_IF(gcc_cv_objdump,, [
2033 if test -f $gcc_cv_binutils_srcdir/configure.in \
2034      && test -f ../binutils/Makefile \
2035      && test x$build = x$host; then
2036         # Single tree build which includes binutils.
2037         gcc_cv_objdump=../binutils/objdump$build_exeext
2038 elif test -x objdump$build_exeext; then
2039         gcc_cv_objdump=./objdump$build_exeext
2040 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2041         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2042 else
2043         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2044 fi])
2045
2046 AC_MSG_CHECKING(what objdump to use)
2047 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2048         # Single tree build which includes binutils.
2049         AC_MSG_RESULT(newly built objdump)
2050 elif test x$gcc_cv_objdump = x; then
2051         AC_MSG_RESULT(not found)
2052 else
2053         AC_MSG_RESULT($gcc_cv_objdump)
2054 fi
2055
2056 # Figure out what readelf we will be using.
2057 AS_VAR_SET_IF(gcc_cv_readelf,, [
2058 if test -f $gcc_cv_binutils_srcdir/configure.in \
2059      && test -f ../binutils/Makefile \
2060      && test x$build = x$host; then
2061         # Single tree build which includes binutils.
2062         gcc_cv_readelf=../binutils/readelf$build_exeext
2063 elif test -x readelf$build_exeext; then
2064         gcc_cv_readelf=./readelf$build_exeext
2065 else
2066         AC_PATH_PROG(gcc_cv_readelf, readelf)
2067 fi])
2068
2069 AC_MSG_CHECKING(what readelf to use)
2070 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2071         # Single tree build which includes binutils.
2072         AC_MSG_RESULT(newly built readelf)
2073 elif test x$gcc_cv_readelf = x; then
2074         AC_MSG_RESULT(not found)
2075 else
2076         AC_MSG_RESULT($gcc_cv_readelf)
2077 fi
2078
2079 # Figure out what assembler alignment features are present.
2080 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2081  [2,6,0],,
2082 [.balign 4
2083 .p2align 2],,
2084 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2085   [Define if your assembler supports .balign and .p2align.])])
2086
2087 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2088  [2,8,0],,
2089  [.p2align 4,,7],,
2090 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2091   [Define if your assembler supports specifying the maximum number
2092    of bytes to skip when using the GAS .p2align command.])])
2093
2094 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2095  [2,8,0],,
2096  [.literal16],,
2097 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2098   [Define if your assembler supports .literal16.])])
2099
2100 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2101  [elf,2,9,0],,
2102  [conftest_label1: .word 0
2103 .subsection -1
2104 conftest_label2: .word 0
2105 .previous],
2106  [if test x$gcc_cv_nm != x; then
2107     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2108     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2109     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2110     then :
2111     else gcc_cv_as_subsection_m1=yes
2112     fi
2113     rm -f conftest.nm1 conftest.nm2
2114   fi],
2115  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2116   [Define if your assembler supports .subsection and .subsection -1 starts
2117    emitting at the beginning of your section.])])
2118
2119 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2120  [2,2,0],,
2121  [      .weak foobar],,
2122 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2123
2124 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2125  [2,17,0],,
2126  [      .weakref foobar, barfnot],,
2127 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2128
2129 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2130  [2,15,91],,
2131  [      .SPACE $TEXT$
2132         .NSUBSPA $CODE$,COMDAT],,
2133 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2134
2135 # .hidden needs to be supported in both the assembler and the linker,
2136 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2137 # This is irritatingly difficult to feature test for; we have to check the
2138 # date string after the version number.  If we've got an in-tree
2139 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2140 # to be safe.
2141 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2142 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2143  [elf,2,13,0],,
2144 [       .hidden foobar
2145 foobar:],[
2146 # Solaris 9/x86 as incorrectly emits an alias for a hidden symbol with
2147 # STV_HIDDEN, so disable .hidden support if so.
2148 case "${target}" in
2149   i?86-*-solaris2*)
2150     if test x$gcc_cv_as != x && test x$gcc_cv_objdump != x; then
2151       cat > conftest.s <<EOF
2152 .globl hidden
2153         .hidden hidden
2154 hidden:
2155 .globl default
2156         .set    default,hidden
2157 EOF
2158       if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
2159         && $gcc_cv_objdump -t conftest.o 2>/dev/null | \
2160         grep '\.hidden default' > /dev/null; then
2161         gcc_cv_as_hidden=no
2162       else
2163         gcc_cv_as_hidden=yes
2164       fi
2165     else
2166       # Assume bug is present if objdump is missing.
2167       gcc_cv_as_hidden=no
2168     fi
2169     ;;
2170   *)
2171     gcc_cv_as_hidden=yes
2172     ;;
2173 esac])
2174
2175 # gnu_indirect_function type is an extension proposed at
2176 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2177 # selection of function implementation
2178 AC_ARG_ENABLE(gnu-indirect-function,
2179  [AS_HELP_STRING([--enable-gnu-indirect-function],
2180                  [enable the use of the @gnu_indirect_function to glibc systems])],
2181  [case $enable_gnu_indirect_function in
2182     yes | no) ;;
2183     *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2184 Valid choices are 'yes' and 'no'.]) ;;
2185   esac],
2186  [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2187 if test x$enable_gnu_indirect_function = xyes; then
2188   AC_DEFINE(HAVE_GNU_INDIRECT_FUNCTION, 1,
2189    [Define if your system supports gnu indirect functions.])
2190 fi
2191
2192 changequote(,)dnl
2193 if test $in_tree_ld != yes ; then
2194   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2195   if test x"$ld_is_gold" = xyes; then
2196     gcc_cv_ld_hidden=yes
2197   elif echo "$ld_ver" | grep GNU > /dev/null; then
2198     ld_vers=`echo $ld_ver | sed -n \
2199         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2200     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2201     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2202     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2203     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2204   else
2205     case "${target}" in
2206       *-*-solaris2*)
2207         #
2208         # Solaris 2 ld -V output looks like this for a regular version:
2209         #
2210         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699
2211         #
2212         # but test versions add stuff at the end:
2213         #
2214         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10
2215         #
2216         ld_ver=`$gcc_cv_ld -V 2>&1`
2217         if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2218           ld_vers=`echo $ld_ver | sed -n \
2219             -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2220           ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2221           ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2222         fi
2223         ;;
2224     esac
2225   fi
2226 fi
2227 changequote([,])dnl
2228
2229 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2230 [[if test $in_tree_ld = yes ; then
2231   gcc_cv_ld_hidden=no
2232   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2233      && test $in_tree_ld_is_elf = yes; then
2234      gcc_cv_ld_hidden=yes
2235   fi
2236 else
2237   gcc_cv_ld_hidden=yes
2238   if echo "$ld_ver" | grep GNU > /dev/null; then
2239     if test 0"$ld_date" -lt 20020404; then
2240       if test -n "$ld_date"; then
2241         # If there was date string, but was earlier than 2002-04-04, fail
2242         gcc_cv_ld_hidden=no
2243       elif test -z "$ld_vers"; then
2244         # If there was no date string nor ld version number, something is wrong
2245         gcc_cv_ld_hidden=no
2246       else
2247         test -z "$ld_vers_patch" && ld_vers_patch=0
2248         if test "$ld_vers_major" -lt 2; then
2249           gcc_cv_ld_hidden=no
2250         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2251           gcc_cv_ld_hidden="no"
2252         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2253           gcc_cv_ld_hidden=no
2254         fi
2255       fi
2256     fi
2257   else
2258     case "${target}" in
2259       hppa64*-*-hpux* | ia64*-*-hpux*)
2260         gcc_cv_ld_hidden=yes
2261         ;;
2262       *-*-solaris2.8*)
2263         # .hidden support was backported to Solaris 8, starting with ld
2264         # version 1.276.
2265         if test "$ld_vers_minor" -ge 276; then
2266           gcc_cv_ld_hidden=yes
2267         else
2268           gcc_cv_ld_hidden=no
2269         fi
2270         ;;
2271       *-*-solaris2.9* | *-*-solaris2.1[0-9]*)
2272         # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2273         # .symbolic was only added in Solaris 9 12/02.
2274         gcc_cv_ld_hidden=yes
2275         ;;
2276       *)
2277         gcc_cv_ld_hidden=no
2278         ;;
2279     esac
2280   fi
2281 fi]])
2282 libgcc_visibility=no
2283 AC_SUBST(libgcc_visibility)
2284 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2285 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2286   libgcc_visibility=yes
2287   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2288   [Define if your assembler and linker support .hidden.])
2289 fi
2290
2291 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2292 gcc_cv_ld_ro_rw_mix=unknown
2293 if test $in_tree_ld = yes ; then
2294   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2295      && test $in_tree_ld_is_elf = yes; then
2296     gcc_cv_ld_ro_rw_mix=read-write
2297   fi
2298 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2299   echo '.section myfoosect, "a"' > conftest1.s
2300   echo '.section myfoosect, "aw"' > conftest2.s
2301   echo '.byte 1' >> conftest2.s
2302   echo '.section myfoosect, "a"' > conftest3.s
2303   echo '.byte 0' >> conftest3.s
2304   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2305      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2306      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2307      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2308         conftest2.o conftest3.o > /dev/null 2>&1; then
2309     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2310                          | sed -e '/myfoosect/!d' -e N`
2311     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2312       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2313         gcc_cv_ld_ro_rw_mix=read-only
2314       else
2315         gcc_cv_ld_ro_rw_mix=read-write
2316       fi
2317     fi
2318   fi
2319 changequote(,)dnl
2320   rm -f conftest.* conftest[123].*
2321 changequote([,])dnl
2322 fi
2323 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2324         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2325   [Define if your linker links a mix of read-only
2326    and read-write sections into a read-write section.])
2327 fi
2328 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2329
2330 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2331 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2332   [elf,2,11,0],,
2333 [       .data
2334         .uleb128 L2 - L1
2335 L1:
2336         .uleb128 1280
2337         .sleb128 -1010
2338 L2:],
2339 [[# GAS versions before 2.11 do not support uleb128,
2340   # despite appearing to.
2341   # ??? There exists an elf-specific test that will crash
2342   # the assembler.  Perhaps it's better to figure out whether
2343   # arbitrary sections are supported and try the test.
2344   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2345   if echo "$as_ver" | grep GNU > /dev/null; then
2346     as_vers=`echo $as_ver | sed -n \
2347         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2348     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2349     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2350     if test $as_major -eq 2 && test $as_minor -lt 11
2351     then :
2352     else gcc_cv_as_leb128=yes
2353     fi
2354   fi]],
2355   [AC_DEFINE(HAVE_AS_LEB128, 1,
2356     [Define if your assembler supports .sleb128 and .uleb128.])])
2357
2358 # Check if we have assembler support for unwind directives.
2359 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2360   ,,
2361 [       .text
2362         .cfi_startproc
2363         .cfi_offset 0, 0
2364         .cfi_same_value 1
2365         .cfi_def_cfa 1, 2
2366         .cfi_escape 1, 2, 3, 4, 5
2367         .cfi_endproc],
2368 [case "$target" in
2369   *-*-solaris*)
2370     # If the linker used on Solaris (like Sun ld) isn't capable of merging
2371     # read-only and read-write sections, we need to make sure that the
2372     # assembler used emits read-write .eh_frame sections.
2373     if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2374       if test "x$gcc_cv_objdump" != x; then
2375         if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2376                 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2377           gcc_cv_as_cfi_directive=no
2378         else
2379           case "$target" in
2380             i?86-*-solaris2.1[[0-9]]*)
2381               # On Solaris/x86, make sure that GCC and gas agree on using
2382               # read-only .eh_frame sections for 64-bit.
2383               if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \
2384                 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2385                         sed -e /.eh_frame/!d -e N | \
2386                         grep READONLY > /dev/null; then
2387                 gcc_cv_as_cfi_directive=yes
2388               else
2389                 gcc_cv_as_cfi_directive=no
2390               fi
2391               ;;
2392             *)
2393               gcc_cv_as_cfi_directive=yes
2394               ;;
2395           esac
2396         fi
2397       else
2398         # no objdump, err on the side of caution
2399         gcc_cv_as_cfi_directive=no
2400       fi
2401     else
2402       gcc_cv_as_cfi_directive=yes
2403     fi
2404     ;;
2405   *-*-*)
2406     gcc_cv_as_cfi_directive=yes
2407     ;;
2408 esac])
2409 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2410 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2411   ,,
2412 [       .text
2413         .cfi_startproc
2414         .cfi_adjust_cfa_offset 64
2415         .skip 75040, 0
2416         .cfi_adjust_cfa_offset 128
2417         .cfi_endproc],
2418 [[
2419 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2420     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
2421    gcc_cv_as_cfi_advance_working=yes
2422 fi
2423 ]])
2424 else
2425   # no objdump, err on the side of caution
2426   gcc_cv_as_cfi_advance_working=no
2427 fi
2428 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2429 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2430   [`if test $gcc_cv_as_cfi_directive = yes \
2431        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2432   [Define 0/1 if your assembler supports CFI directives.])
2433
2434 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2435 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2436   gcc_cv_as_cfi_personality_directive, ,,
2437 [       .text
2438         .cfi_startproc
2439         .cfi_personality 0, symbol
2440         .cfi_endproc])
2441 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2442   [`if test $gcc_cv_as_cfi_personality_directive = yes;
2443     then echo 1; else echo 0; fi`],
2444   [Define 0/1 if your assembler supports .cfi_personality.])
2445
2446 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2447   gcc_cv_as_cfi_sections_directive, ,,
2448 [       .text
2449         .cfi_sections .debug_frame, .eh_frame
2450         .cfi_startproc
2451         .cfi_endproc],
2452 [case $target_os in
2453   win32 | pe | cygwin* | mingw32* | uwin*)
2454     # Need to check that we generated the correct relocation for the
2455     # .debug_frame section.  This was fixed for binutils 2.21.
2456     gcc_cv_as_cfi_sections_directive=no
2457     if test "x$gcc_cv_objdump" != x; then
2458      if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2459         grep secrel > /dev/null; then
2460       gcc_cv_as_cfi_sections_directive=yes
2461      fi
2462     fi
2463     ;;
2464   *)
2465     gcc_cv_as_cfi_sections_directive=yes
2466     ;;
2467 esac])
2468 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2469 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2470   [`if test $gcc_cv_as_cfi_sections_directive = yes;
2471     then echo 1; else echo 0; fi`],
2472   [Define 0/1 if your assembler supports .cfi_sections.])
2473
2474 # GAS versions up to and including 2.11.0 may mis-optimize
2475 # .eh_frame data.
2476 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2477   [elf,2,12,0],,
2478 [       .text
2479 .LFB1:
2480         .4byte  0
2481 .L1:
2482         .4byte  0
2483 .LFE1:
2484         .section        .eh_frame,"aw",@progbits
2485 __FRAME_BEGIN__:
2486         .4byte  .LECIE1-.LSCIE1
2487 .LSCIE1:
2488         .4byte  0x0
2489         .byte   0x1
2490         .ascii "z\0"
2491         .byte   0x1
2492         .byte   0x78
2493         .byte   0x1a
2494         .byte   0x0
2495         .byte   0x4
2496         .4byte  1
2497         .p2align 1
2498 .LECIE1:
2499 .LSFDE1:
2500         .4byte  .LEFDE1-.LASFDE1
2501 .LASFDE1:
2502         .4byte  .LASFDE1-__FRAME_BEGIN__
2503         .4byte  .LFB1
2504         .4byte  .LFE1-.LFB1
2505         .byte   0x4
2506         .4byte  .LFE1-.LFB1
2507         .byte   0x4
2508         .4byte  .L1-.LFB1
2509 .LEFDE1:],
2510 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2511 cat > conftest.lit <<EOF
2512  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2513  0010 01000000 12000000 18000000 00000000  ................
2514  0020 08000000 04080000 0044               .........D      @&t@
2515 EOF
2516 cat > conftest.big <<EOF
2517  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2518  0010 00000001 00000012 00000018 00000000  ................
2519  0020 00000008 04000000 0844               .........D      @&t@
2520 EOF
2521   # If the assembler didn't choke, and we can objdump,
2522   # and we got the correct data, then succeed.
2523   # The text in the here-document typically retains its unix-style line
2524   # endings, while the output of objdump will use host line endings.
2525   # Therefore, use diff -b for the comparisons.
2526   if test x$gcc_cv_objdump != x \
2527   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2528      | tail -3 > conftest.got \
2529   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2530     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2531   then
2532     gcc_cv_as_eh_frame=yes
2533   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2534     gcc_cv_as_eh_frame=buggy
2535   else
2536     # Uh oh, what do we do now?
2537     gcc_cv_as_eh_frame=no
2538   fi])
2539
2540 if test $gcc_cv_as_eh_frame = buggy; then
2541   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2542   [Define if your assembler mis-optimizes .eh_frame data.])
2543 fi
2544
2545 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2546  [elf,2,12,0], [--fatal-warnings],
2547  [.section .rodata.str, "aMS", @progbits, 1])
2548 if test $gcc_cv_as_shf_merge = no; then
2549   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2550     [elf,2,12,0], [--fatal-warnings],
2551     [.section .rodata.str, "aMS", %progbits, 1])
2552 fi
2553 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2554   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2555 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2556
2557 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group,
2558  [elf,2,16,0], [--fatal-warnings],
2559  [.section .text,"axG",@progbits,.foo,comdat])
2560 if test $gcc_cv_as_comdat_group = yes; then
2561   gcc_cv_as_comdat_group_percent=no
2562 else
2563  gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group_percent,
2564    [elf,2,16,0], [--fatal-warnings],
2565    [.section .text,"axG",%progbits,.foo,comdat])
2566 fi
2567 if test x"$ld_is_gold" = xyes; then
2568   comdat_group=yes
2569 elif test $in_tree_ld = yes ; then
2570   comdat_group=no
2571   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
2572      && test $in_tree_ld_is_elf = yes; then
2573      comdat_group=yes
2574   fi
2575 elif echo "$ld_ver" | grep GNU > /dev/null; then
2576   comdat_group=yes
2577   if test 0"$ld_date" -lt 20050308; then
2578     if test -n "$ld_date"; then
2579       # If there was date string, but was earlier than 2005-03-08, fail
2580       comdat_group=no
2581     elif test "$ld_vers_major" -lt 2; then
2582       comdat_group=no
2583     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2584       comdat_group=no
2585     fi
2586   fi
2587 else
2588 changequote(,)dnl
2589   case "${target}" in
2590     *-*-solaris2.1[1-9]*)
2591       # Sun ld has COMDAT group support since Solaris 9, but it doesn't
2592       # interoperate with GNU as until Solaris 11 build 130, i.e. ld
2593       # version 1.688.
2594       #
2595       # FIXME: Maybe need to refine later when COMDAT group support with
2596       # Sun as is implemented.
2597       if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 1688; then
2598         comdat_group=yes
2599       else
2600         comdat_group=no
2601       fi
2602       ;;
2603     *)
2604       # Assume linkers other than GNU ld don't support COMDAT group.
2605       comdat_group=no
2606       ;;
2607   esac
2608 changequote([,])dnl
2609 fi
2610 # Allow overriding the automatic COMDAT group tests above.
2611 AC_ARG_ENABLE(comdat,
2612   [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
2613   [comdat_group="$enable_comdat"])
2614 if test $comdat_group = no; then
2615   gcc_cv_as_comdat_group=no
2616   gcc_cv_as_comdat_group_percent=no
2617 fi
2618 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2619   [`if test $gcc_cv_as_comdat_group = yes || test $gcc_cv_as_comdat_group_percent = yes; then echo 1; else echo 0; fi`],
2620 [Define 0/1 if your assembler and linker support COMDAT groups.])
2621
2622 gcc_GAS_CHECK_FEATURE([line table discriminator support],
2623  gcc_cv_as_discriminator,
2624  [2,19,51],,
2625 [       .text
2626         .file 1 "conf.c"
2627         .loc 1 1 0 discriminator 1],,
2628 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
2629   [Define if your assembler supports the .loc discriminator sub-directive.])])
2630
2631 # Thread-local storage - the check is heavily parameterized.
2632 conftest_s=
2633 tls_first_major=
2634 tls_first_minor=
2635 tls_as_opt=
2636 case "$target" in
2637 changequote(,)dnl
2638   alpha*-*-*)
2639     conftest_s='
2640         .section ".tdata","awT",@progbits
2641 foo:    .long   25
2642         .text
2643         ldq     $27,__tls_get_addr($29)         !literal!1
2644         lda     $16,foo($29)                    !tlsgd!1
2645         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
2646         ldq     $27,__tls_get_addr($29)         !literal!2
2647         lda     $16,foo($29)                    !tlsldm!2
2648         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
2649         ldq     $1,foo($29)                     !gotdtprel
2650         ldah    $2,foo($29)                     !dtprelhi
2651         lda     $3,foo($2)                      !dtprello
2652         lda     $4,foo($29)                     !dtprel
2653         ldq     $1,foo($29)                     !gottprel
2654         ldah    $2,foo($29)                     !tprelhi
2655         lda     $3,foo($2)                      !tprello
2656         lda     $4,foo($29)                     !tprel'
2657         tls_first_major=2
2658         tls_first_minor=13
2659         tls_as_opt=--fatal-warnings
2660         ;;
2661   cris-*-*|crisv32-*-*)
2662     conftest_s='
2663         .section ".tdata","awT",@progbits
2664 x:      .long   25
2665         .text
2666         move.d x:IE,$r10
2667         nop'
2668         tls_first_major=2
2669         tls_first_minor=20
2670         tls_as_opt=--fatal-warnings
2671         ;;
2672   frv*-*-*)
2673     conftest_s='
2674         .section ".tdata","awT",@progbits
2675 x:      .long   25
2676         .text
2677         call    #gettlsoff(x)'
2678         tls_first_major=2
2679         tls_first_minor=14
2680         ;;
2681   hppa*-*-linux*)
2682     conftest_s='
2683 t1:     .reg    %r20
2684 t2:     .reg    %r21
2685 gp:     .reg    %r19
2686         .section ".tdata","awT",@progbits
2687 foo:    .long   25
2688         .text
2689         .align  4
2690         addil LT%foo-$tls_gdidx$,gp
2691         ldo RT%foo-$tls_gdidx$(%r1),%arg0
2692         b __tls_get_addr
2693         nop
2694         addil LT%foo-$tls_ldidx$,gp
2695         b __tls_get_addr
2696         ldo RT%foo-$tls_ldidx$(%r1),%arg0
2697         addil LR%foo-$tls_dtpoff$,%ret0
2698         ldo RR%foo-$tls_dtpoff$(%r1),%t1
2699         mfctl %cr27,%t1
2700         addil LT%foo-$tls_ieoff$,gp
2701         ldw RT%foo-$tls_ieoff$(%r1),%t2
2702         add %t1,%t2,%t3
2703         mfctl %cr27,%t1
2704         addil LR%foo-$tls_leoff$,%t1
2705         ldo RR%foo-$tls_leoff$(%r1),%t2'
2706         tls_first_major=2
2707         tls_first_minor=15
2708         tls_as_opt=--fatal-warnings
2709         ;;
2710   arm*-*-*)
2711     conftest_s='
2712         .section ".tdata","awT",%progbits
2713 foo:    .long   25
2714         .text
2715 .word foo(gottpoff)
2716 .word foo(tpoff)
2717 .word foo(tlsgd)
2718 .word foo(tlsldm)
2719 .word foo(tlsldo)'
2720         tls_first_major=2
2721         tls_first_minor=17
2722         ;;
2723   i[34567]86-*-*)
2724     case "$target" in
2725       i[34567]86-*-solaris2.*)
2726         on_solaris=yes
2727         tga_func=___tls_get_addr
2728         ;;
2729       *)
2730         on_solaris=no
2731         ;;
2732     esac
2733     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2734       conftest_s='
2735         .section .tdata,"awt",@progbits'
2736       tls_first_major=0
2737       tls_first_minor=0
2738 changequote([,])dnl
2739       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
2740 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
2741 changequote(,)dnl
2742     else
2743       conftest_s='
2744         .section ".tdata","awT",@progbits'
2745       tls_first_major=2
2746       tls_first_minor=14
2747       tls_as_opt="--fatal-warnings"
2748     fi
2749     conftest_s="$conftest_s
2750 foo:    .long   25
2751         .text
2752         movl    %gs:0, %eax
2753         leal    foo@tlsgd(,%ebx,1), %eax
2754         leal    foo@tlsldm(%ebx), %eax
2755         leal    foo@dtpoff(%eax), %edx
2756         movl    foo@gottpoff(%ebx), %eax
2757         subl    foo@gottpoff(%ebx), %eax
2758         addl    foo@gotntpoff(%ebx), %eax
2759         movl    foo@indntpoff, %eax
2760         movl    \$foo@tpoff, %eax
2761         subl    \$foo@tpoff, %eax
2762         leal    foo@ntpoff(%ecx), %eax"
2763     ;;
2764   x86_64-*-*)
2765     conftest_s='
2766         .section ".tdata","awT",@progbits
2767 foo:    .long   25
2768         .text
2769         movq    %fs:0, %rax
2770         leaq    foo@TLSGD(%rip), %rdi
2771         leaq    foo@TLSLD(%rip), %rdi
2772         leaq    foo@DTPOFF(%rax), %rdx
2773         movq    foo@GOTTPOFF(%rip), %rax
2774         movq    $foo@TPOFF, %rax'
2775         tls_first_major=2
2776         tls_first_minor=14
2777         tls_as_opt=--fatal-warnings
2778         ;;
2779   ia64-*-*)
2780     conftest_s='
2781         .section ".tdata","awT",@progbits
2782 foo:    data8   25
2783         .text
2784         addl    r16 = @ltoff(@dtpmod(foo#)), gp
2785         addl    r17 = @ltoff(@dtprel(foo#)), gp
2786         addl    r18 = @ltoff(@tprel(foo#)), gp
2787         addl    r19 = @dtprel(foo#), gp
2788         adds    r21 = @dtprel(foo#), r13
2789         movl    r23 = @dtprel(foo#)
2790         addl    r20 = @tprel(foo#), gp
2791         adds    r22 = @tprel(foo#), r13
2792         movl    r24 = @tprel(foo#)'
2793         tls_first_major=2
2794         tls_first_minor=13
2795         tls_as_opt=--fatal-warnings
2796         ;;
2797   mips*-*-*)
2798     conftest_s='
2799         .section .tdata,"awT",@progbits
2800 x:
2801         .word 2
2802         .text
2803         addiu $4, $28, %tlsgd(x)
2804         addiu $4, $28, %tlsldm(x)
2805         lui $4, %dtprel_hi(x)
2806         addiu $4, $4, %dtprel_lo(x)
2807         lw $4, %gottprel(x)($28)
2808         lui $4, %tprel_hi(x)
2809         addiu $4, $4, %tprel_lo(x)'
2810         tls_first_major=2
2811         tls_first_minor=16
2812         tls_as_opt='-32 --fatal-warnings'
2813         ;;
2814   m68k-*-*)
2815     conftest_s='
2816         .section .tdata,"awT",@progbits
2817 x:
2818         .word 2
2819         .text
2820 foo:
2821         move.l x@TLSGD(%a5),%a0
2822         move.l x@TLSLDM(%a5),%a0
2823         move.l x@TLSLDO(%a5),%a0
2824         move.l x@TLSIE(%a5),%a0
2825         move.l x@TLSLE(%a5),%a0'
2826         tls_first_major=2
2827         tls_first_minor=19
2828         tls_as_opt='--fatal-warnings'
2829         ;;
2830   powerpc-*-*)
2831     conftest_s='
2832         .section ".tdata","awT",@progbits
2833         .align 2
2834 ld0:    .space 4
2835 ld1:    .space 4
2836 x1:     .space 4
2837 x2:     .space 4
2838 x3:     .space 4
2839         .text
2840         addi 3,31,ld0@got@tlsgd
2841         bl __tls_get_addr
2842         addi 3,31,x1@got@tlsld
2843         bl __tls_get_addr
2844         addi 9,3,x1@dtprel
2845         addis 9,3,x2@dtprel@ha
2846         addi 9,9,x2@dtprel@l
2847         lwz 9,x3@got@tprel(31)
2848         add 9,9,x@tls
2849         addi 9,2,x1@tprel
2850         addis 9,2,x2@tprel@ha
2851         addi 9,9,x2@tprel@l'
2852         tls_first_major=2
2853         tls_first_minor=14
2854         tls_as_opt="-a32 --fatal-warnings"
2855         ;;
2856   powerpc64-*-*)
2857     conftest_s='
2858         .section ".tdata","awT",@progbits
2859         .align 3
2860 ld0:    .space 8
2861 ld1:    .space 8
2862 x1:     .space 8
2863 x2:     .space 8
2864 x3:     .space 8
2865         .text
2866         addi 3,2,ld0@got@tlsgd
2867         bl .__tls_get_addr
2868         nop
2869         addi 3,2,ld1@toc
2870         bl .__tls_get_addr
2871         nop
2872         addi 3,2,x1@got@tlsld
2873         bl .__tls_get_addr
2874         nop
2875         addi 9,3,x1@dtprel
2876         bl .__tls_get_addr
2877         nop
2878         addis 9,3,x2@dtprel@ha
2879         addi 9,9,x2@dtprel@l
2880         bl .__tls_get_addr
2881         nop
2882         ld 9,x3@got@dtprel(2)
2883         add 9,9,3
2884         bl .__tls_get_addr
2885         nop'
2886         tls_first_major=2
2887         tls_first_minor=14
2888         tls_as_opt="-a64 --fatal-warnings"
2889         ;;
2890   s390-*-*)
2891     conftest_s='
2892         .section ".tdata","awT",@progbits
2893 foo:    .long   25
2894         .text
2895         .long   foo@TLSGD
2896         .long   foo@TLSLDM
2897         .long   foo@DTPOFF
2898         .long   foo@NTPOFF
2899         .long   foo@GOTNTPOFF
2900         .long   foo@INDNTPOFF
2901         l       %r1,foo@GOTNTPOFF(%r12)
2902         l       %r1,0(%r1):tls_load:foo
2903         bas     %r14,0(%r1,%r13):tls_gdcall:foo
2904         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
2905         tls_first_major=2
2906         tls_first_minor=14
2907         tls_as_opt="-m31 --fatal-warnings"
2908         ;;
2909   s390x-*-*)
2910     conftest_s='
2911         .section ".tdata","awT",@progbits
2912 foo:    .long   25
2913         .text
2914         .quad   foo@TLSGD
2915         .quad   foo@TLSLDM
2916         .quad   foo@DTPOFF
2917         .quad   foo@NTPOFF
2918         .quad   foo@GOTNTPOFF
2919         lg      %r1,foo@GOTNTPOFF(%r12)
2920         larl    %r1,foo@INDNTPOFF
2921         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
2922         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
2923         tls_first_major=2
2924         tls_first_minor=14
2925         tls_as_opt="-m64 -Aesame --fatal-warnings"
2926         ;;
2927   sh-*-* | sh[34]-*-*)
2928     conftest_s='
2929         .section ".tdata","awT",@progbits
2930 foo:    .long   25
2931         .text
2932         .long   foo@TLSGD
2933         .long   foo@TLSLDM
2934         .long   foo@DTPOFF
2935         .long   foo@GOTTPOFF
2936         .long   foo@TPOFF'
2937         tls_first_major=2
2938         tls_first_minor=13
2939         tls_as_opt=--fatal-warnings
2940         ;;
2941   sparc*-*-*)
2942     case "$target" in
2943       sparc*-sun-solaris2.*)
2944         on_solaris=yes
2945         tga_func=__tls_get_addr
2946         ;;
2947       *)
2948         on_solaris=no
2949         ;;
2950     esac
2951     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2952       conftest_s='
2953         .section ".tdata",#alloc,#write,#tls'
2954         tls_first_major=0
2955         tls_first_minor=0
2956     else
2957       conftest_s='
2958         .section ".tdata","awT",@progbits'
2959         tls_first_major=2
2960         tls_first_minor=14
2961         tls_as_opt="-32 --fatal-warnings"
2962     fi
2963     conftest_s="$conftest_s
2964 foo:    .long   25
2965         .text
2966         sethi   %tgd_hi22(foo), %o0
2967         add     %o0, %tgd_lo10(foo), %o1
2968         add     %l7, %o1, %o0, %tgd_add(foo)
2969         call    __tls_get_addr, %tgd_call(foo)
2970         sethi   %tldm_hi22(foo), %l1
2971         add     %l1, %tldm_lo10(foo), %l2
2972         add     %l7, %l2, %o0, %tldm_add(foo)
2973         call    __tls_get_addr, %tldm_call(foo)
2974         sethi   %tldo_hix22(foo), %l3
2975         xor     %l3, %tldo_lox10(foo), %l4
2976         add     %o0, %l4, %l5, %tldo_add(foo)
2977         sethi   %tie_hi22(foo), %o3
2978         add     %o3, %tie_lo10(foo), %o3
2979         ld      [%l7 + %o3], %o2, %tie_ld(foo)
2980         add     %g7, %o2, %o4, %tie_add(foo)
2981         sethi   %tle_hix22(foo), %l1
2982         xor     %l1, %tle_lox10(foo), %o5
2983         ld      [%g7 + %o5], %o1"
2984         ;;
2985   xtensa*-*-*)
2986     conftest_s='
2987         .section ".tdata","awT",@progbits
2988 foo:    .long   25
2989         .text
2990         movi    a8, foo@TLSFUNC
2991         movi    a10, foo@TLSARG
2992         callx8.tls a8, foo@TLSCALL'
2993         tls_first_major=2
2994         tls_first_minor=19
2995         ;;
2996 changequote([,])dnl
2997 esac
2998 set_have_as_tls=no
2999 if test "x$enable_tls" = xno ; then
3000   : # TLS explicitly disabled.
3001 elif test "x$enable_tls" = xyes ; then
3002   set_have_as_tls=yes # TLS explicitly enabled.
3003 elif test -z "$tls_first_major"; then
3004   : # If we don't have a check, assume no support.
3005 else
3006   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
3007   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
3008   [set_have_as_tls=yes])
3009 fi
3010 case "$target" in
3011   *-*-irix6*)
3012     # IRIX 6.5 rld and libc.so lack TLS support, so even if gas and gld
3013     # with TLS support are in use, native TLS cannot work.
3014     set_have_as_tls=no
3015     ;;
3016   *-*-osf*)
3017     # Tru64 UNIX loader and libc.so lack TLS support, so even if gas and
3018     # gld with TLS support are in use, native TLS cannot work.
3019     set_have_as_tls=no
3020     ;;
3021   # TLS was introduced in the Solaris 9 FCS release and backported to
3022   # Solaris 8 patches.  Support for GNU-style TLS on x86 was only
3023   # introduced in Solaris 9 4/04, replacing the earlier Sun style that Sun
3024   # ld and GCC don't support any longer.
3025   *-*-solaris2.*)
3026     AC_MSG_CHECKING(linker and ld.so.1 TLS support)
3027     ld_tls_support=no
3028     # Check ld and ld.so.1 TLS support.
3029     if echo "$ld_ver" | grep GNU > /dev/null; then
3030       # Assume all interesting versions of GNU ld have TLS support.
3031       # FIXME: still need ld.so.1 support, i.e. ld version checks below.
3032       ld_tls_support=yes
3033     else
3034       case "$target" in
3035         # Solaris 8/x86 ld has GNU style TLS support since version 1.280.
3036         i?86-*-solaris2.8)
3037           min_tls_ld_vers_minor=280
3038           ;;
3039         # Solaris 8/SPARC ld has TLS support since version 1.272.
3040         sparc*-*-solaris2.8)
3041           min_tls_ld_vers_minor=272
3042           ;;
3043         # Solaris 9/x86 ld has GNU style TLS support since version 1.374.
3044         i?86-*-solaris2.9)
3045           min_tls_ld_vers_minor=374
3046           ;;
3047         # Solaris 9/SPARC and Solaris 10+ ld have TLS support since FCS.
3048         sparc*-*-solaris2.9 | *-*-solaris2.1[[0-9]]*)
3049           min_tls_ld_vers_minor=343
3050           ;;
3051       esac
3052       if test "$ld_vers_major" -gt 1 || \
3053         test "$ld_vers_minor" -ge "$min_tls_ld_vers_minor"; then
3054         ld_tls_support=yes
3055       else
3056         set_have_as_tls=no
3057       fi
3058     fi
3059     AC_MSG_RESULT($ld_tls_support)
3060
3061     save_LIBS="$LIBS"
3062     save_LDFLAGS="$LDFLAGS"
3063     LIBS=
3064     LDFLAGS=
3065
3066     AC_MSG_CHECKING(alternate thread library)
3067     case "$target" in
3068       # TLS support was backported to Solaris 8 patches, but only lives in
3069       # the alternate thread library which became the default in Solaris 9.
3070       # We want to always use that, irrespective of TLS support.
3071       *-*-solaris2.8)
3072         # Take multilib subdir into account.  There's no spec to handle
3073         # this.  The 64 symlink exists since Solaris 8.
3074         lwp_dir=/usr/lib/lwp
3075         lwp_spec="-L$lwp_dir%{m64:/64} -R$lwp_dir%{m64:/64}"
3076         LDFLAGS="-L$lwp_dir -R$lwp_dir"
3077         ;;
3078       *-*-solaris2*)
3079         lwp_dir="none"
3080         lwp_spec=""
3081         ;;
3082     esac
3083     # Always define LIB_THREAD_LDFLAGS_SPEC, even without TLS support.
3084     AC_DEFINE_UNQUOTED(LIB_THREAD_LDFLAGS_SPEC, "$lwp_spec",
3085         [Define to the linker flags to use for -pthread.])
3086     AC_MSG_RESULT($lwp_dir)
3087
3088     AC_MSG_CHECKING(library containing $tga_func)
3089     # Before Solaris 10, __tls_get_addr (SPARC/x64) resp. ___tls_get_addr
3090     # (32-bit x86) only lived in libthread, so check for that.  Keep
3091     # set_have_as_tls if found, disable if not.
3092     AC_SEARCH_LIBS([$tga_func], [thread],, [set_have_as_tls=no])
3093     # Clear LIBS if we cannot support TLS.
3094     if test $set_have_as_tls = no; then
3095       LIBS=
3096     fi
3097     # Always define LIB_TLS_SPEC, even without TLS support.
3098     AC_DEFINE_UNQUOTED(LIB_TLS_SPEC, "$LIBS",
3099         [Define to the library containing __tls_get_addr/___tls_get_addr.])
3100     AC_MSG_RESULT($LIBS)
3101
3102     LIBS="$save_LIBS"
3103     LDFLAGS="$save_LDFLAGS"
3104     ;;
3105 esac
3106 if test $set_have_as_tls = yes ; then
3107   AC_DEFINE(HAVE_AS_TLS, 1,
3108             [Define if your assembler and linker support thread-local storage.])
3109 fi
3110
3111 # Target-specific assembler checks.
3112
3113 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3114 gcc_cv_ld_static_dynamic=no
3115 gcc_cv_ld_static_option='-Bstatic'
3116 gcc_cv_ld_dynamic_option='-Bdynamic'
3117 if test $in_tree_ld = yes ; then
3118   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3119     gcc_cv_ld_static_dynamic=yes
3120   fi
3121 elif test x$gcc_cv_ld != x; then
3122   # Check if linker supports -Bstatic/-Bdynamic option
3123   if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
3124      && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
3125       gcc_cv_ld_static_dynamic=yes
3126   else
3127     case "$target" in
3128       # Tru64 UNIX support -noso/-so_archive instead of -Bstatic/-Bdynamic.
3129       alpha*-dec-osf*)
3130         gcc_cv_ld_static_dynamic=yes
3131         gcc_cv_ld_static_option="-noso"
3132         gcc_cv_ld_dynamic_option="-so_archive"
3133         ;;
3134       # IRIX 6 ld supports -Bstatic/-Bdynamic.
3135       mips-sgi-irix6*)
3136         gcc_cv_ld_static_dynamic=yes
3137         ;;
3138       # Solaris 2 ld always supports -Bstatic/-Bdynamic.
3139       *-*-solaris2*)
3140         gcc_cv_ld_static_dynamic=yes
3141         ;;
3142     esac
3143   fi
3144 fi
3145 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3146         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3147 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
3148         AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
3149 [Define to the linker option to disable use of shared objects.])
3150         AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
3151 [Define to the linker option to enable use of shared objects.])
3152 fi
3153 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3154
3155 if test x"$demangler_in_ld" = xyes; then
3156   AC_MSG_CHECKING(linker --demangle support)
3157   gcc_cv_ld_demangle=no
3158   if test $in_tree_ld = yes; then
3159     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3160       gcc_cv_ld_demangle=yes
3161     fi
3162   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3163     # Check if the GNU linker supports --demangle option
3164     if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
3165       gcc_cv_ld_demangle=yes
3166     fi
3167   fi
3168   if test x"$gcc_cv_ld_demangle" = xyes; then
3169     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3170 [Define if your linker supports --demangle option.])
3171   fi
3172   AC_MSG_RESULT($gcc_cv_ld_demangle)
3173 fi
3174
3175 AC_MSG_CHECKING(linker plugin support)
3176 gcc_cv_lto_plugin=no
3177 if test -f liblto_plugin.la; then
3178   if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET=" = x"$gcc_cv_ld"; then
3179     if test x"$ld_is_gold" = xyes; then
3180       gcc_cv_lto_plugin=yes
3181     elif 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 \
3182       gcc_cv_lto_plugin=yes
3183     fi
3184   # Check if the linker supports --plugin-opt option
3185   elif $ORIGINAL_PLUGIN_LD_FOR_TARGET --help 2>/dev/null | grep plugin-opt > /dev/null; then
3186     gcc_cv_lto_plugin=yes
3187   fi
3188 fi
3189 if test x"$gcc_cv_lto_plugin" = xyes; then
3190   AC_DEFINE(HAVE_LTO_PLUGIN, 1,
3191 [Define if your linker supports plugin.])
3192 fi
3193 AC_MSG_RESULT($gcc_cv_lto_plugin)
3194
3195 case "$target" in
3196   # All TARGET_ABI_OSF targets.
3197   alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
3198     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3199         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3200 [       .set nomacro
3201         .text
3202         extbl   $3, $2, $3      !lituse_bytoff!1
3203         ldq     $2, a($29)      !literal!1
3204         ldq     $4, b($29)      !literal!2
3205         ldq_u   $3, 0($2)       !lituse_base!1
3206         ldq     $27, f($29)     !literal!5
3207         jsr     $26, ($27), f   !lituse_jsr!5
3208         ldah    $29, 0($26)     !gpdisp!3
3209         lda     $0, c($29)      !gprel
3210         ldah    $1, d($29)      !gprelhigh
3211         lda     $1, d($1)       !gprellow
3212         lda     $29, 0($29)     !gpdisp!3],,
3213     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3214   [Define if your assembler supports explicit relocations.])])
3215     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3216         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3217 [       .set nomacro
3218         .text
3219         ldq     $27, a($29)     !literal!1
3220         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
3221     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3222   [Define if your assembler supports the lituse_jsrdirect relocation.])])
3223     ;;
3224
3225   cris-*-*)
3226     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3227       gcc_cv_as_cris_no_mul_bug,[2,15,91],
3228       [-no-mul-bug-abort], [.text],,
3229       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3230                 [Define if your assembler supports the -no-mul-bug-abort option.])])
3231     ;;
3232
3233   sparc*-*-*)
3234     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3235       [.register %g2, #scratch],,
3236       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3237                 [Define if your assembler supports .register.])])
3238
3239     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3240       [-relax], [.text],,
3241       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3242                 [Define if your assembler supports -relax option.])])
3243
3244     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3245       gcc_cv_as_sparc_gotdata_op,,
3246       [-K PIC],
3247 [.text
3248 foo:
3249         nop
3250 bar:
3251         sethi %gdop_hix22(foo), %g1
3252         xor    %g1, %gdop_lox10(foo), %g1
3253         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
3254       [if test x$gcc_cv_ld != x \
3255        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3256          if $gcc_cv_ld -v | grep GNU >/dev/null 2>&1; then
3257            if test x$gcc_cv_objdump != x; then
3258              if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3259                 | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3260                gcc_cv_as_sparc_gotdata_op=no
3261              else
3262                gcc_cv_as_sparc_gotdata_op=yes
3263              fi
3264            fi
3265          else
3266            gcc_cv_as_sparc_gotdata_op=yes
3267          fi
3268        fi
3269        rm -f conftest],
3270       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3271                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3272
3273     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3274       gcc_cv_as_sparc_ua_pcrel,,
3275       [-K PIC],
3276 [.text
3277 foo:
3278         nop
3279 .data
3280 .align 4
3281 .byte 0
3282 .uaword %r_disp32(foo)],
3283       [if test x$gcc_cv_ld != x \
3284        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3285          gcc_cv_as_sparc_ua_pcrel=yes
3286        fi
3287        rm -f conftest],
3288       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3289                 [Define if your assembler and linker support unaligned PC relative relocs.])
3290
3291       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3292         gcc_cv_as_sparc_ua_pcrel_hidden,,
3293         [-K PIC],
3294 [.data
3295 .align 4
3296 .byte 0x31
3297 .uaword %r_disp32(foo)
3298 .byte 0x32, 0x33, 0x34
3299 .global foo
3300 .hidden foo
3301 foo:
3302 .skip 4],
3303         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3304          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3305          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3306             | grep ' 31000000 07323334' > /dev/null 2>&1; then
3307             if $gcc_cv_objdump -R conftest 2> /dev/null \
3308                | grep 'DISP32' > /dev/null 2>&1; then
3309                 :
3310             else
3311                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3312             fi
3313          fi
3314          rm -f conftest],
3315          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3316                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3317     ]) # unaligned pcrel relocs
3318
3319     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3320       gcc_cv_as_sparc_offsetable_lo10,,
3321       [-xarch=v9],
3322 [.text
3323         or %g1, %lo(ab) + 12, %g1
3324         or %g1, %lo(ab + 12), %g1],
3325       [if test x$gcc_cv_objdump != x \
3326        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3327           | grep ' 82106000 82106000' > /dev/null 2>&1; then
3328          gcc_cv_as_sparc_offsetable_lo10=yes
3329        fi],
3330        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3331                  [Define if your assembler supports offsetable %lo().])])
3332     ;;
3333
3334 changequote(,)dnl
3335   i[34567]86-*-* | x86_64-*-*)
3336 changequote([,])dnl
3337     case $target_os in
3338       cygwin*)
3339         # Full C++ conformance when using a shared libstdc++-v3 requires some
3340         # support from the Cygwin DLL, which in more recent versions exports
3341         # wrappers to aid in interposing and redirecting operators new, delete,
3342         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
3343         # are configuring for a version of Cygwin that exports the wrappers.
3344         if test x$host = x$target; then
3345           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3346         else
3347           # Can't check presence of libc functions during cross-compile, so
3348           # we just have to assume we're building for an up-to-date target.
3349           gcc_ac_cygwin_dll_wrappers=yes
3350         fi
3351         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
3352           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
3353           [Define if you want to generate code by default that assumes that the
3354            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
3355     esac
3356     case $target_os in
3357       cygwin* | pe | mingw32*)
3358         # Recent binutils allows the three-operand form of ".comm" on PE.  This
3359         # definition is used unconditionally to initialise the default state of
3360         # the target option variable that governs usage of the feature.
3361         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
3362          [2,19,52],,[.comm foo,1,32])
3363         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
3364           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
3365           [Define if your assembler supports specifying the alignment
3366            of objects allocated using the GAS .comm command.])
3367         # Used for DWARF 2 in PE
3368         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
3369           gcc_cv_as_ix86_pe_secrel32,
3370           [2,15,91],,
3371 [.text
3372 foo:    nop
3373 .data
3374         .secrel32 foo],
3375           [if test x$gcc_cv_ld != x \
3376            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
3377              gcc_cv_as_ix86_pe_secrel32=yes
3378            fi
3379            rm -f conftest],
3380           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
3381             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
3382         # Test if the assembler supports the extended form of the .section
3383         # directive that specifies section alignment.  LTO support uses this,
3384         # but normally only after installation, so we warn but don't fail the
3385         # configure if LTO is enabled but the assembler does not support it.
3386         gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
3387           [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
3388         if test x$gcc_cv_as_section_has_align != xyes; then
3389           case ",$enable_languages," in
3390             *,lto,*)
3391               AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
3392               ;;
3393           esac
3394         fi
3395         ;;
3396     esac
3397
3398     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
3399        gcc_cv_as_ix86_filds,,,
3400        [filds mem; fists mem],,
3401        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
3402          [Define if your assembler uses filds and fists mnemonics.])])
3403
3404     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
3405        gcc_cv_as_ix86_fildq,,,
3406        [fildq mem; fistpq mem],,
3407        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
3408          [Define if your assembler uses fildq and fistq mnemonics.])])
3409
3410     gcc_GAS_CHECK_FEATURE([cmov syntax],
3411       gcc_cv_as_ix86_cmov_sun_syntax,,,
3412       [cmovl.l %edx, %eax],,
3413       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
3414         [Define if your assembler supports the Sun syntax for cmov.])])
3415
3416     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
3417       gcc_cv_as_ix86_ffreep,,,
3418       [ffreep %st(1)],,
3419       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
3420         [Define if your assembler supports the ffreep mnemonic.])])
3421
3422     gcc_GAS_CHECK_FEATURE([.quad directive],
3423       gcc_cv_as_ix86_quad,,,
3424       [.quad 0],,
3425       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
3426         [Define if your assembler supports the .quad directive.])])
3427
3428     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
3429       gcc_cv_as_ix86_sahf,,,
3430       [.code64
3431        sahf],,
3432       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
3433         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
3434
3435     gcc_GAS_CHECK_FEATURE([swap suffix],
3436       gcc_cv_as_ix86_swap,,,
3437       [movl.s %esp, %ebp],,
3438       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
3439         [Define if your assembler supports the swap suffix.])])
3440
3441     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
3442       gcc_cv_as_ix86_diff_sect_delta,,,
3443       [.section .rodata
3444 .L1:
3445         .long .L2-.L1
3446         .long .L3-.L1
3447         .text
3448 .L3:    nop
3449 .L2:    nop],,
3450       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
3451         [Define if your assembler supports the subtraction of symbols in different sections.])])
3452
3453     # These two are used unconditionally by i386.[ch]; it is to be defined
3454     # to 1 if the feature is present, 0 otherwise.
3455     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
3456         gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
3457 [       .text
3458 .L0:
3459         nop
3460         .data
3461         .long .L0@GOTOFF])
3462     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
3463       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
3464       [Define true if the assembler supports '.long foo@GOTOFF'.])
3465
3466     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
3467         gcc_cv_as_ix86_rep_lock_prefix,,,
3468         [rep movsl
3469          lock addl %edi, (%eax,%esi)
3470          lock orl $0, (%esp)],,
3471         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
3472           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
3473
3474     ;;
3475
3476   ia64*-*-*)
3477     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
3478         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
3479 [       .text
3480         addl r15 = @ltoffx(x#), gp
3481         ;;
3482         ld8.mov r16 = [[r15]], x#],,
3483     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
3484           [Define if your assembler supports ltoffx and ldxmov relocations.])])
3485
3486     ;;
3487
3488   powerpc*-*-*)
3489     case $target in
3490       *-*-aix*) conftest_s='    .machine "pwr5"
3491         .csect .text[[PR]]
3492         mfcr 3,128';;
3493       *-*-darwin*)
3494         gcc_GAS_CHECK_FEATURE([.machine directive support],
3495           gcc_cv_as_machine_directive,,,
3496           [     .machine ppc7400])
3497         if test x$gcc_cv_as_machine_directive != xyes; then
3498           echo "*** This target requires an assembler supporting \".machine\"" >&2
3499           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
3500           test x$build = x$target && exit 1
3501         fi
3502         conftest_s='    .text
3503         mfcr r3,128';;
3504       *) conftest_s='   .machine power4
3505         .text
3506         mfcr 3,128';;
3507     esac
3508
3509     gcc_GAS_CHECK_FEATURE([mfcr field support],
3510       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
3511       [$conftest_s],,
3512       [AC_DEFINE(HAVE_AS_MFCRF, 1,
3513           [Define if your assembler supports mfcr field.])])
3514
3515     case $target in
3516       *-*-aix*) conftest_s='    .machine "pwr5"
3517         .csect .text[[PR]]
3518         popcntb 3,3';;
3519       *) conftest_s='   .machine power5
3520         .text
3521         popcntb 3,3';;
3522     esac
3523
3524     gcc_GAS_CHECK_FEATURE([popcntb support],
3525       gcc_cv_as_powerpc_popcntb, [2,17,0],,
3526       [$conftest_s],,
3527       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
3528           [Define if your assembler supports popcntb field.])])
3529
3530     case $target in
3531       *-*-aix*) conftest_s='    .machine "pwr5x"
3532         .csect .text[[PR]]
3533         frin 1,1';;
3534       *) conftest_s='   .machine power5
3535         .text
3536         frin 1,1';;
3537     esac
3538
3539     gcc_GAS_CHECK_FEATURE([fp round support],
3540       gcc_cv_as_powerpc_fprnd, [2,17,0],,
3541       [$conftest_s],,
3542       [AC_DEFINE(HAVE_AS_FPRND, 1,
3543           [Define if your assembler supports fprnd.])])
3544
3545     case $target in
3546       *-*-aix*) conftest_s='    .machine "pwr6"
3547         .csect .text[[PR]]
3548         mffgpr 1,3';;
3549       *) conftest_s='   .machine power6
3550         .text
3551         mffgpr 1,3';;
3552     esac
3553
3554     gcc_GAS_CHECK_FEATURE([move fp gpr support],
3555       gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
3556       [$conftest_s],,
3557       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
3558           [Define if your assembler supports mffgpr and mftgpr.])])
3559
3560     case $target in
3561       *-*-aix*) conftest_s='    .csect .text[[PR]]
3562 LCF..0:
3563         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
3564       *-*-darwin*)
3565         conftest_s='    .text
3566 LCF0:
3567         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
3568       *) conftest_s='   .text
3569 .LCF0:
3570         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
3571     esac
3572
3573     gcc_GAS_CHECK_FEATURE([rel16 relocs],
3574       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
3575       [$conftest_s],,
3576       [AC_DEFINE(HAVE_AS_REL16, 1,
3577           [Define if your assembler supports R_PPC_REL16 relocs.])])
3578
3579     case $target in
3580       *-*-aix*) conftest_s='    .machine "pwr6"
3581         .csect .text[[PR]]
3582         cmpb 3,4,5';;
3583       *) conftest_s='   .machine power6
3584         .text
3585         cmpb 3,4,5';;
3586     esac
3587
3588     gcc_GAS_CHECK_FEATURE([compare bytes support],
3589       gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
3590       [$conftest_s],,
3591       [AC_DEFINE(HAVE_AS_CMPB, 1,
3592           [Define if your assembler supports cmpb.])])
3593
3594     case $target in
3595       *-*-aix*) conftest_s='    .machine "pwr6"
3596         .csect .text[[PR]]
3597         dadd 1,2,3';;
3598       *) conftest_s='   .machine power6
3599         .text
3600         dadd 1,2,3';;
3601     esac
3602
3603     gcc_GAS_CHECK_FEATURE([decimal float support],
3604       gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
3605       [$conftest_s],,
3606       [AC_DEFINE(HAVE_AS_DFP, 1,
3607           [Define if your assembler supports DFP instructions.])])
3608
3609     case $target in
3610       *-*-aix*) conftest_s='    .machine "pwr7"
3611         .csect .text[[PR]]
3612         lxvd2x 1,2,3';;
3613       *) conftest_s='   .machine power7
3614         .text
3615         lxvd2x 1,2,3';;
3616     esac
3617
3618     gcc_GAS_CHECK_FEATURE([vector-scalar support],
3619       gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
3620       [$conftest_s],,
3621       [AC_DEFINE(HAVE_AS_VSX, 1,
3622           [Define if your assembler supports VSX instructions.])])
3623
3624     case $target in
3625       *-*-aix*) conftest_s='    .machine "pwr7"
3626         .csect .text[[PR]]
3627         popcntd 3,3';;
3628       *) conftest_s='   .machine power7
3629         .text
3630         popcntd 3,3';;
3631     esac
3632
3633     gcc_GAS_CHECK_FEATURE([popcntd support],
3634       gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
3635       [$conftest_s],,
3636       [AC_DEFINE(HAVE_AS_POPCNTD, 1,
3637           [Define if your assembler supports POPCNTD instructions.])])
3638
3639     case $target in
3640       *-*-aix*) conftest_s='    .csect .text[[PR]]
3641         lwsync';;
3642       *) conftest_s='   .text
3643         lwsync';;
3644     esac
3645
3646     gcc_GAS_CHECK_FEATURE([lwsync support],
3647       gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
3648       [$conftest_s],,
3649       [AC_DEFINE(HAVE_AS_LWSYNC, 1,
3650           [Define if your assembler supports LWSYNC instructions.])])
3651
3652     case $target in
3653       *-*-aix*) conftest_s='    .machine "476"
3654         .csect .text[[PR]]
3655         dci 0';;
3656       *) conftest_s='   .machine "476"
3657         .text
3658         dci 0';;
3659     esac
3660
3661     gcc_GAS_CHECK_FEATURE([data cache invalidate support],
3662       gcc_cv_as_powerpc_dci, [9,99,0], -a32,
3663       [$conftest_s],,
3664       [AC_DEFINE(HAVE_AS_DCI, 1,
3665           [Define if your assembler supports the DCI/ICI instructions.])])
3666
3667     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3668       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
3669       [.gnu_attribute 4,1],,
3670       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3671           [Define if your assembler supports .gnu_attribute.])])
3672
3673     gcc_GAS_CHECK_FEATURE([tls marker support],
3674       gcc_cv_as_powerpc_tls_markers, [2,20,0],,
3675       [ bl __tls_get_addr(x@tlsgd)],,
3676       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
3677           [Define if your assembler supports arg info for __tls_get_addr.])])
3678
3679     case $target in
3680       *-*-aix*)
3681         gcc_GAS_CHECK_FEATURE([.ref support],
3682           gcc_cv_as_aix_ref, [2.21.0],,
3683           [     .csect stuff[[rw]]
3684              stuff:
3685                 .long 1
3686                 .extern sym
3687                 .ref sym
3688           ],,
3689           [AC_DEFINE(HAVE_AS_REF, 1,
3690             [Define if your assembler supports .ref])])
3691         ;;
3692     esac
3693     ;;
3694
3695   mips*-*-*)
3696     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3697       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
3698 [       lw $4,%gp_rel(foo)($4)],,
3699       [if test x$target_cpu_default = x
3700        then target_cpu_default=MASK_EXPLICIT_RELOCS
3701        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
3702        fi])
3703     gcc_GAS_CHECK_FEATURE([-mno-shared support],
3704       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
3705       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
3706                  [Define if the assembler understands -mno-shared.])])
3707
3708     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3709       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
3710       [.gnu_attribute 4,1],,
3711       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3712           [Define if your assembler supports .gnu_attribute.])])
3713
3714     gcc_GAS_CHECK_FEATURE([.dtprelword support],
3715       gcc_cv_as_mips_dtprelword, [2,18,0],,
3716       [.section .tdata,"awT",@progbits
3717 x:
3718         .word 2
3719         .text
3720         .dtprelword x+0x8000],,
3721       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
3722           [Define if your assembler supports .dtprelword.])])
3723
3724     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
3725       gcc_cv_as_mips_dspr1_mult,,,
3726 [       .set    mips32r2
3727         .set    nodspr2
3728         .set    dsp
3729         madd    $ac3,$4,$5
3730         maddu   $ac3,$4,$5
3731         msub    $ac3,$4,$5
3732         msubu   $ac3,$4,$5
3733         mult    $ac3,$4,$5
3734         multu   $ac3,$4,$5],,
3735       [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
3736           [Define if your assembler supports DSPR1 mult.])])
3737
3738     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
3739     gcc_cv_as_ld_jalr_reloc=no
3740     if test $gcc_cv_as_mips_explicit_relocs = yes; then
3741       if test $in_tree_ld = yes ; then
3742         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
3743            && test $in_tree_ld_is_elf = yes; then
3744           gcc_cv_as_ld_jalr_reloc=yes
3745         fi
3746       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
3747         echo '  .ent x' > conftest.s
3748         echo 'x:        ld $2,%got_disp(y)($3)' >> conftest.s
3749         echo '  ld $25,%call16(y)($28)' >> conftest.s
3750         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
3751         echo '1:        jalr $25' >> conftest.s
3752         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
3753         echo '1:        jalr $25' >> conftest.s
3754         echo '  .end x' >> conftest.s
3755         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
3756            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
3757           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
3758              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
3759             gcc_cv_as_ld_jalr_reloc=yes
3760           fi
3761         fi
3762         rm -f conftest.*
3763       fi
3764     fi
3765     if test $gcc_cv_as_ld_jalr_reloc = yes; then
3766       if test x$target_cpu_default = x; then
3767         target_cpu_default=MASK_RELAX_PIC_CALLS
3768       else
3769         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
3770       fi
3771     fi
3772     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
3773
3774     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
3775       [gcc_cv_ld_mips_personality_relaxation],
3776       [gcc_cv_ld_mips_personality_relaxation=no
3777        if test $in_tree_ld = yes ; then
3778          if test "$gcc_cv_gld_major_version" -eq 2 \
3779                  -a "$gcc_cv_gld_minor_version" -ge 21 \
3780                  -o "$gcc_cv_gld_major_version" -gt 2; then
3781            gcc_cv_ld_mips_personality_relaxation=yes
3782          fi
3783        elif test x$gcc_cv_as != x \
3784                  -a x$gcc_cv_ld != x \
3785                  -a x$gcc_cv_readelf != x ; then
3786          cat > conftest.s <<EOF
3787         .cfi_startproc
3788         .cfi_personality 0x80,indirect_ptr
3789         .ent test
3790 test:
3791         nop
3792         .end test
3793         .cfi_endproc
3794
3795         .section .data,"aw",@progbits
3796 indirect_ptr:
3797         .dc.a personality
3798 EOF
3799          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
3800             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
3801            if $gcc_cv_readelf -d conftest 2>&1 \
3802               | grep TEXTREL > /dev/null 2>&1; then
3803              :
3804            elif $gcc_cv_readelf --relocs conftest 2>&1 \
3805                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
3806              :
3807            else
3808              gcc_cv_ld_mips_personality_relaxation=yes
3809            fi
3810          fi
3811        fi
3812        rm -f conftest.s conftest.o conftest])
3813     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
3814             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
3815       [Define if your linker can relax absolute .eh_frame personality
3816 pointers into PC-relative form.])
3817     fi
3818     ;;
3819 esac
3820
3821 # Mips and HP-UX need the GNU assembler.
3822 # Linux on IA64 might be able to use the Intel assembler.
3823
3824 case "$target" in
3825   mips*-*-* | *-*-hpux* )
3826     if test x$gas_flag = xyes \
3827        || test x"$host" != x"$build" \
3828        || test ! -x "$gcc_cv_as" \
3829        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
3830       :
3831     else
3832       echo "*** This configuration requires the GNU assembler" >&2
3833       exit 1
3834     fi
3835     ;;
3836 esac
3837
3838 # ??? Not all targets support dwarf2 debug_line, even within a version
3839 # of gas.  Moreover, we need to emit a valid instruction to trigger any
3840 # info to the output file.  So, as supported targets are added to gas 2.11,
3841 # add some instruction here to (also) show we expect this might work.
3842 # ??? Once 2.11 is released, probably need to add first known working
3843 # version to the per-target configury.
3844 case "$cpu_type" in
3845   alpha | arm | avr | bfin | cris | i386 | m32c | m68k | microblaze | mips \
3846   | pa | rs6000 | score | sparc | spu | xstormy16 | xtensa)
3847     insn="nop"
3848     ;;
3849   ia64 | s390)
3850     insn="nop 0"
3851     ;;
3852   mmix)
3853     insn="swym 0"
3854     ;;
3855 esac
3856 if test x"$insn" != x; then
3857  conftest_s="\
3858         .file 1 \"conftest.s\"
3859         .loc 1 3 0
3860         $insn"
3861  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
3862   gcc_cv_as_dwarf2_debug_line,
3863   [elf,2,11,0],, [$conftest_s],
3864   [if test x$gcc_cv_objdump != x \
3865    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
3866       | grep debug_line > /dev/null 2>&1; then
3867      gcc_cv_as_dwarf2_debug_line=yes
3868    fi])
3869
3870 # The .debug_line file table must be in the exact order that
3871 # we specified the files, since these indices are also used
3872 # by DW_AT_decl_file.  Approximate this test by testing if
3873 # the assembler bitches if the same index is assigned twice.
3874  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
3875   gcc_cv_as_dwarf2_file_buggy,,,
3876 [       .file 1 "foo.s"
3877         .file 1 "bar.s"])
3878
3879  if test $gcc_cv_as_dwarf2_debug_line = yes \
3880  && test $gcc_cv_as_dwarf2_file_buggy = no; then
3881         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
3882   [Define if your assembler supports dwarf2 .file/.loc directives,
3883    and preserves file table indices exactly as given.])
3884  fi
3885
3886  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
3887   gcc_cv_as_gdwarf2_flag,
3888   [elf,2,11,0], [--gdwarf2], [$insn],,
3889   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
3890 [Define if your assembler supports the --gdwarf2 option.])])
3891
3892  gcc_GAS_CHECK_FEATURE([--gstabs option],
3893   gcc_cv_as_gstabs_flag,
3894   [elf,2,11,0], [--gstabs], [$insn],
3895   [# The native Solaris 9/Intel assembler doesn't understand --gstabs
3896    # and warns about it, but still exits successfully.  So check for
3897    # this.
3898    if AC_TRY_COMMAND([$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null])
3899    then :
3900    else gcc_cv_as_gstabs_flag=yes
3901    fi],
3902   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
3903 [Define if your assembler supports the --gstabs option.])])
3904
3905  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
3906   gcc_cv_as_debug_prefix_map_flag,
3907   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
3908   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
3909 [Define if your assembler supports the --debug-prefix-map option.])])
3910 fi
3911
3912 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
3913  ,,
3914 [.lcomm bar,4,16],,
3915 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
3916   [Define if your assembler supports .lcomm with an alignment field.])])
3917
3918 AC_ARG_ENABLE(gnu-unique-object,
3919  [AS_HELP_STRING([--enable-gnu-unique-object],
3920    [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
3921  [case $enable_gnu_unique_object in
3922     yes | no) ;;
3923     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
3924 Valid choices are 'yes' and 'no'.]) ;;
3925   esac],
3926  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
3927    [elf,2,19,52],,
3928    [.type foo, @gnu_unique_object],,
3929 # Also check for ld.so support, i.e. glibc 2.11 or higher.
3930    [[if test x$host = x$build -a x$host = x$target &&
3931        ldd --version 2>/dev/null &&
3932        glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
3933       glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
3934       glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`
3935       glibcnum=`expr $glibcmajor \* 1000 + $glibcminor`
3936       if test "$glibcnum" -ge 2011 ; then
3937         enable_gnu_unique_object=yes
3938       fi
3939     fi]])])
3940 if test x$enable_gnu_unique_object = xyes; then
3941   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
3942    [Define if your assembler supports @gnu_unique_object.])
3943 fi
3944
3945 AC_CACHE_CHECK([assembler for tolerance to line number 0],
3946  [gcc_cv_as_line_zero],
3947  [gcc_cv_as_line_zero=no
3948   if test $in_tree_gas = yes; then
3949     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
3950   elif test "x$gcc_cv_as" != x; then
3951     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
3952     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
3953        test "x`cat conftest.out`" = x
3954     then
3955       gcc_cv_as_line_zero=yes
3956     else
3957       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
3958       cat conftest.s >&AS_MESSAGE_LOG_FD
3959       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
3960       cat conftest.out >&AS_MESSAGE_LOG_FD
3961     fi
3962     rm -f conftest.o conftest.s conftest.out
3963   fi])
3964 if test "x$gcc_cv_as_line_zero" = xyes; then
3965   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
3966 [Define if the assembler won't complain about a line such as # 0 "" 2.])
3967 fi
3968
3969 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
3970 gcc_cv_ld_eh_frame_hdr=no
3971 if test $in_tree_ld = yes ; then
3972   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
3973      && test $in_tree_ld_is_elf = yes; then
3974     gcc_cv_ld_eh_frame_hdr=yes
3975   fi
3976 elif test x$gcc_cv_ld != x; then
3977   if echo "$ld_ver" | grep GNU > /dev/null; then
3978     # Check if linker supports --eh-frame-hdr option
3979     if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
3980       gcc_cv_ld_eh_frame_hdr=yes
3981     fi
3982   else
3983     case "$target" in
3984       *-*-solaris2*)
3985         # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
3986         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
3987           gcc_cv_ld_eh_frame_hdr=yes
3988         fi
3989         ;;
3990     esac
3991   fi
3992 fi
3993 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
3994 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
3995         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
3996 [Define if your linker supports .eh_frame_hdr.])
3997 fi
3998 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
3999
4000 AC_MSG_CHECKING(linker position independent executable support)
4001 gcc_cv_ld_pie=no
4002 if test $in_tree_ld = yes ; then
4003   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
4004      && test $in_tree_ld_is_elf = yes; then
4005     gcc_cv_ld_pie=yes
4006   fi
4007 elif test x$gcc_cv_ld != x; then
4008         # Check if linker supports -pie option
4009         if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
4010                 gcc_cv_ld_pie=yes
4011         fi
4012 fi
4013 if test x"$gcc_cv_ld_pie" = xyes; then
4014         AC_DEFINE(HAVE_LD_PIE, 1,
4015 [Define if your linker supports -pie option.])
4016 fi
4017 AC_MSG_RESULT($gcc_cv_ld_pie)
4018
4019 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
4020 gcc_cv_ld_eh_gc_sections=no
4021 if test $in_tree_ld = yes ; then
4022   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
4023      && test $in_tree_ld_is_elf = yes; then
4024     gcc_cv_ld_eh_gc_sections=yes
4025   fi
4026 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
4027   cat > conftest.s <<EOF
4028         .section        .text
4029 .globl _start
4030         .type _start, @function
4031 _start:
4032         .long foo
4033         .size _start, .-_start
4034         .section        .text.foo,"ax",@progbits
4035         .type foo, @function
4036 foo:
4037         .long 0
4038         .size foo, .-foo
4039         .section        .gcc_except_table.foo,"a",@progbits
4040 .L0:
4041         .long 0
4042         .section        .eh_frame,"a",@progbits
4043         .long .L0
4044 EOF
4045   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4046     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4047          | grep "gc-sections option ignored" > /dev/null; then
4048       gcc_cv_ld_eh_gc_sections=no
4049     elif $gcc_cv_objdump -h conftest 2> /dev/null \
4050          | grep gcc_except_table > /dev/null; then
4051       gcc_cv_ld_eh_gc_sections=yes
4052       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
4053       if test x$gcc_cv_as_comdat_group != xyes; then
4054         gcc_cv_ld_eh_gc_sections=no
4055         cat > conftest.s <<EOF
4056         .section        .text
4057 .globl _start
4058         .type _start, @function
4059 _start:
4060         .long foo
4061         .size _start, .-_start
4062         .section        .gnu.linkonce.t.foo,"ax",@progbits
4063         .type foo, @function
4064 foo:
4065         .long 0
4066         .size foo, .-foo
4067         .section        .gcc_except_table.foo,"a",@progbits
4068 .L0:
4069         .long 0
4070         .section        .eh_frame,"a",@progbits
4071         .long .L0
4072 EOF
4073         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4074           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4075                | grep "gc-sections option ignored" > /dev/null; then
4076             gcc_cv_ld_eh_gc_sections=no
4077           elif $gcc_cv_objdump -h conftest 2> /dev/null \
4078                | grep gcc_except_table > /dev/null; then
4079             gcc_cv_ld_eh_gc_sections=yes
4080           fi
4081         fi
4082       fi
4083     fi
4084   fi
4085   rm -f conftest.s conftest.o conftest
4086 fi
4087 case "$target" in
4088   hppa*-*-linux*)
4089     # ??? This apparently exposes a binutils bug with PC-relative relocations.
4090     gcc_cv_ld_eh_gc_sections=no
4091     ;;
4092 esac
4093 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
4094         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
4095   [Define if your linker supports garbage collection of
4096    sections in presence of EH frames.])
4097 fi
4098 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
4099
4100 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
4101 gcc_cv_ld_eh_gc_sections_bug=no
4102 if test $in_tree_ld = yes ; then
4103   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
4104      && test $in_tree_ld_is_elf = yes; then
4105     gcc_cv_ld_eh_gc_sections_bug=yes
4106   fi
4107 elif test x$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
4108   gcc_cv_ld_eh_gc_sections_bug=yes
4109   cat > conftest.s <<EOF
4110         .section        .text
4111 .globl _start
4112         .type _start, @function
4113 _start:
4114         .long foo
4115         .size _start, .-_start
4116         .section        .text.startup.foo,"ax",@progbits
4117         .type foo, @function
4118 foo:
4119         .long 0
4120         .size foo, .-foo
4121         .section        .gcc_except_table.foo,"a",@progbits
4122 .L0:
4123         .long 0
4124         .section        .eh_frame,"a",@progbits
4125         .long .L0
4126 EOF
4127   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
4128     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
4129          | grep "gc-sections option ignored" > /dev/null; then
4130       :
4131     elif $gcc_cv_objdump -h conftest 2> /dev/null \
4132          | grep gcc_except_table > /dev/null; then
4133       gcc_cv_ld_eh_gc_sections_bug=no
4134     fi
4135   fi
4136   rm -f conftest.s conftest.o conftest
4137 fi
4138 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
4139         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
4140   [Define if your linker has buggy garbage collection of
4141    sections support when .text.startup.foo like sections are used.])
4142 fi
4143 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
4144
4145 # --------
4146 # UNSORTED
4147 # --------
4148
4149 AC_CACHE_CHECK(linker --as-needed support,
4150 gcc_cv_ld_as_needed,
4151 [gcc_cv_ld_as_needed=no
4152 if test $in_tree_ld = yes ; then
4153   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4154      && test $in_tree_ld_is_elf = yes; then
4155     gcc_cv_ld_as_needed=yes
4156   fi
4157 elif test x$gcc_cv_ld != x; then
4158         # Check if linker supports --as-needed and --no-as-needed options
4159         if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
4160                 gcc_cv_ld_as_needed=yes
4161         fi
4162 fi
4163 ])
4164 if test x"$gcc_cv_ld_as_needed" = xyes; then
4165         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
4166 [Define if your linker supports --as-needed and --no-as-needed options.])
4167 fi
4168
4169 case "$target:$tm_file" in
4170   powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
4171     AC_CACHE_CHECK(linker support for omitting dot symbols,
4172     gcc_cv_ld_no_dot_syms,
4173     [gcc_cv_ld_no_dot_syms=no
4174     if test $in_tree_ld = yes ; then
4175       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
4176         gcc_cv_ld_no_dot_syms=yes
4177       fi
4178     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4179       cat > conftest1.s <<EOF
4180         .text
4181         bl .foo
4182 EOF
4183       cat > conftest2.s <<EOF
4184         .section ".opd","aw"
4185         .align 3
4186         .globl foo
4187         .type foo,@function
4188 foo:
4189         .quad .LEfoo,.TOC.@tocbase,0
4190         .text
4191 .LEfoo:
4192         blr
4193         .size foo,.-.LEfoo
4194 EOF
4195       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
4196          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
4197          && $gcc_cv_ld -melf64ppc -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
4198         gcc_cv_ld_no_dot_syms=yes
4199       fi
4200       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
4201     fi
4202     ])
4203     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
4204       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
4205     [Define if your PowerPC64 linker only needs function descriptor syms.])
4206     fi
4207
4208     AC_CACHE_CHECK(linker large toc support,
4209     gcc_cv_ld_large_toc,
4210     [gcc_cv_ld_large_toc=no
4211     if test $in_tree_ld = yes ; then
4212       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
4213         gcc_cv_ld_large_toc=yes
4214       fi
4215     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4216       cat > conftest.s <<EOF
4217         .section ".tbss","awT",@nobits
4218         .align 3
4219 ie0:    .space 8
4220         .global _start
4221         .text
4222 _start:
4223         addis 9,13,ie0@got@tprel@ha
4224         ld 9,ie0@got@tprel@l(9)
4225 EOF
4226       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
4227          && $gcc_cv_ld -melf64ppc --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
4228         gcc_cv_ld_large_toc=yes
4229       fi
4230       rm -f conftest conftest.o conftest.s
4231     fi
4232     ])
4233     if test x"$gcc_cv_ld_large_toc" = xyes; then
4234       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
4235     [Define if your PowerPC64 linker supports a large TOC.])
4236     fi
4237     ;;
4238 esac
4239
4240 AC_CACHE_CHECK(linker --build-id support,
4241   gcc_cv_ld_buildid,
4242   [gcc_cv_ld_buildid=no
4243   if test $in_tree_ld = yes ; then
4244     if test "$gcc_cv_gld_major_version" -eq 2 -a \
4245        "$gcc_cv_gld_minor_version" -ge 18 -o \
4246        "$gcc_cv_gld_major_version" -gt 2 \
4247        && test $in_tree_ld_is_elf = yes; then
4248       gcc_cv_ld_buildid=yes
4249     fi
4250   elif test x$gcc_cv_ld != x; then
4251     if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
4252       gcc_cv_ld_buildid=yes
4253     fi
4254   fi])
4255 if test x"$gcc_cv_ld_buildid" = xyes; then
4256   AC_DEFINE(HAVE_LD_BUILDID, 1,
4257   [Define if your linker supports --build-id.])
4258 fi
4259
4260 AC_ARG_ENABLE(linker-build-id,
4261 [  --enable-linker-build-id
4262                           compiler will always pass --build-id to linker],
4263 [],
4264 enable_linker_build_id=no)
4265
4266 if test x"$enable_linker_build_id" = xyes; then
4267   if test x"$gcc_cv_ld_buildid" = xyes; then
4268     AC_DEFINE(ENABLE_LD_BUILDID, 1,
4269     [Define if gcc should always pass --build-id to linker.])
4270   else
4271     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
4272   fi
4273 fi
4274
4275 # In binutils 2.21, GNU ld gained support for new emulations fully
4276 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
4277 AC_CACHE_CHECK(linker *_sol2 emulation support,
4278   gcc_cv_ld_sol2_emulation,
4279   [gcc_cv_ld_sol2_emulation=no
4280   if test $in_tree_ld = yes ; then
4281     if test "$gcc_cv_gld_major_version" -eq 2 -a \
4282        "$gcc_cv_gld_minor_version" -ge 21 -o \
4283        "$gcc_cv_gld_major_version" -gt 2 \
4284        && test $in_tree_ld_is_elf = yes; then
4285       gcc_cv_ld_sol2_emulation=yes
4286     fi
4287   elif test x$gcc_cv_ld != x; then
4288     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
4289        grep _sol2 > /dev/null; then
4290       gcc_cv_ld_sol2_emulation=yes
4291     fi
4292   fi])
4293 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
4294   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
4295   [Define if your linker supports the *_sol2 emulations.])
4296 fi
4297
4298 AC_CACHE_CHECK(linker --sysroot support,
4299   gcc_cv_ld_sysroot,
4300   [gcc_cv_ld_sysroot=no
4301   if test $in_tree_ld = yes ; then
4302       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
4303         gcc_cv_ld_sysroot=yes
4304       fi
4305   elif test x$gcc_cv_ld != x; then
4306     if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
4307       gcc_cv_ld_sysroot=yes
4308     fi
4309   fi])
4310 if test x"$gcc_cv_ld_sysroot" = xyes; then
4311   AC_DEFINE(HAVE_LD_SYSROOT, 1,
4312   [Define if your linker supports --sysroot.])
4313 fi
4314
4315 if test x$with_sysroot = x && test x$host = x$target \
4316    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4317    && test "$prefix" != "NONE"; then
4318   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4319 [Define to PREFIX/include if cpp should also search that directory.])
4320 fi
4321
4322 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4323   if test "x$with_headers" != x; then
4324     target_header_dir=$with_headers
4325   elif test "x$with_sysroot" = x; then
4326     target_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
4327   elif test "x$with_build_sysroot" != "x"; then
4328     target_header_dir="${with_build_sysroot}/usr/include"
4329   elif test "x$with_sysroot" = xyes; then
4330     target_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
4331   else
4332     target_header_dir="${with_sysroot}/usr/include"
4333   fi
4334 else
4335   target_header_dir=/usr/include
4336 fi
4337
4338 # Test for stack protector support in target C library.
4339 AC_CACHE_CHECK(__stack_chk_fail in target C library,
4340       gcc_cv_libc_provides_ssp,
4341       [gcc_cv_libc_provides_ssp=no
4342     case "$target" in
4343        *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
4344       [# glibc 2.4 and later provides __stack_chk_fail and
4345       # either __stack_chk_guard, or TLS access to stack guard canary.
4346       if test -f $target_header_dir/features.h \
4347          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
4348             $target_header_dir/features.h > /dev/null; then
4349         if $EGREP '^[   ]*#[    ]*define[       ]+__GLIBC__[    ]+([1-9][0-9]|[3-9])' \
4350            $target_header_dir/features.h > /dev/null; then
4351           gcc_cv_libc_provides_ssp=yes
4352         elif $EGREP '^[         ]*#[    ]*define[       ]+__GLIBC__[    ]+2' \
4353              $target_header_dir/features.h > /dev/null \
4354              && $EGREP '^[      ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+([1-9][0-9]|[4-9])' \
4355              $target_header_dir/features.h > /dev/null; then
4356           gcc_cv_libc_provides_ssp=yes
4357         elif $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
4358              $target_header_dir/features.h > /dev/null && \
4359              test -f $target_header_dir/bits/uClibc_config.h && \
4360              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
4361              $target_header_dir/bits/uClibc_config.h > /dev/null; then
4362           gcc_cv_libc_provides_ssp=yes
4363         fi
4364       fi]
4365         ;;
4366        *-*-gnu*)
4367          # Avoid complicated tests (see
4368          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
4369          # simply assert that glibc does provide this, which is true for all
4370          # realistically usable GNU/Hurd configurations.
4371          gcc_cv_libc_provides_ssp=yes;;
4372        *-*-darwin* | *-*-freebsd*)
4373          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
4374            [echo "no __stack_chk_fail on this target"])
4375         ;;
4376   *) gcc_cv_libc_provides_ssp=no ;;
4377     esac])
4378
4379 if test x$gcc_cv_libc_provides_ssp = xyes; then
4380   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
4381             [Define if your target C library provides stack protector support])
4382 fi
4383
4384 # Check if TFmode long double should be used by default or not.
4385 # Some glibc targets used DFmode long double, but with glibc 2.4
4386 # and later they can use TFmode.
4387 case "$target" in
4388   powerpc*-*-linux* | \
4389   powerpc*-*-gnu* | \
4390   sparc*-*-linux* | \
4391   s390*-*-linux* | \
4392   alpha*-*-linux*)
4393     AC_ARG_WITH(long-double-128,
4394 [  --with-long-double-128  Use 128-bit long double by default.],
4395       gcc_cv_target_ldbl128="$with_long_double_128",
4396       [[gcc_cv_target_ldbl128=no
4397       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
4398         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
4399       && gcc_cv_target_ldbl128=yes
4400       ]])
4401     ;;
4402 esac
4403 if test x$gcc_cv_target_ldbl128 = xyes; then
4404   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
4405             [Define if TFmode long double should be the default])
4406 fi
4407
4408 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
4409 gcc_cv_target_dl_iterate_phdr=unknown
4410 case "$target" in
4411   *-*-solaris2*)
4412     # <link.h> needs both a dl_iterate_phdr declaration and support for
4413     # compilation with largefile support.
4414     if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
4415       && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
4416       gcc_cv_target_dl_iterate_phdr=yes
4417     else
4418       gcc_cv_target_dl_iterate_phdr=no
4419     fi
4420     ;;
4421 esac
4422 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
4423 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
4424    AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
4425 [Define if your target C library provides the `dl_iterate_phdr' function.])
4426 fi
4427 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
4428
4429 # Find out what GC implementation we want, or may, use.
4430 AC_ARG_WITH(gc,
4431 [  --with-gc={page,zone}   choose the garbage collection mechanism to use
4432                           with the compiler],
4433 [case "$withval" in
4434   page)
4435     GGC=ggc-$withval
4436     ;;
4437   zone)
4438     GGC=ggc-$withval
4439     AC_DEFINE(GGC_ZONE, 1, [Define if the zone collector is in use])
4440     ;;
4441   *)
4442     AC_MSG_ERROR([$withval is an invalid option to --with-gc])
4443     ;;
4444 esac],
4445 [GGC=ggc-page])
4446 AC_SUBST(GGC)
4447 echo "Using $GGC for garbage collection."
4448
4449 # Libraries to use on the host.  This will normally be set by the top
4450 # level Makefile.  Here we simply capture the value for our Makefile.
4451 if test -z "${HOST_LIBS+set}"; then
4452   HOST_LIBS=
4453 fi
4454 AC_SUBST(HOST_LIBS)
4455
4456 # Use the system's zlib library.
4457 zlibdir=-L../zlib
4458 zlibinc="-I\$(srcdir)/../zlib"
4459 AC_ARG_WITH(system-zlib,
4460 [  --with-system-zlib      use installed libz],
4461 zlibdir=
4462 zlibinc=
4463 )
4464 AC_SUBST(zlibdir)
4465 AC_SUBST(zlibinc)
4466
4467 dnl Very limited version of automake's enable-maintainer-mode
4468
4469 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
4470   dnl maintainer-mode is disabled by default
4471   AC_ARG_ENABLE(maintainer-mode,
4472 [  --enable-maintainer-mode
4473                           enable make rules and dependencies not useful
4474                           (and sometimes confusing) to the casual installer],
4475       maintainer_mode=$enableval,
4476       maintainer_mode=no)
4477
4478 AC_MSG_RESULT($maintainer_mode)
4479
4480 if test "$maintainer_mode" = "yes"; then
4481   MAINT=''
4482 else
4483   MAINT='#'
4484 fi
4485 AC_SUBST(MAINT)dnl
4486
4487 # --------------
4488 # Language hooks
4489 # --------------
4490
4491 # Make empty files to contain the specs and options for each language.
4492 # Then add #include lines to for a compiler that has specs and/or options.
4493
4494 subdirs=
4495 lang_opt_files=
4496 lang_specs_files=
4497 lang_tree_files=
4498 # These (without "all_") are set in each config-lang.in.
4499 # `language' must be a single word so is spelled singularly.
4500 all_languages=
4501 all_compilers=
4502 all_outputs='Makefile'
4503 # List of language makefile fragments.
4504 all_lang_makefrags=
4505 # Additional files for gengtype
4506 all_gtfiles="$target_gtfiles"
4507
4508 # These are the languages that are set in --enable-languages,
4509 # and are available in the GCC tree.
4510 all_selected_languages=
4511
4512 # Add the language fragments.
4513 # Languages are added via two mechanisms.  Some information must be
4514 # recorded in makefile variables, these are defined in config-lang.in.
4515 # We accumulate them and plug them into the main Makefile.
4516 # The other mechanism is a set of hooks for each of the main targets
4517 # like `clean', `install', etc.
4518
4519 language_hooks="Make-hooks"
4520
4521 for lang in ${srcdir}/*/config-lang.in
4522 do
4523 changequote(,)dnl
4524         test "$lang" = "${srcdir}/*/config-lang.in" && continue
4525
4526         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
4527         if test "x$lang_alias" = x
4528         then
4529               echo "$lang doesn't set \$language." 1>&2
4530               exit 1
4531         fi
4532         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
4533         subdirs="$subdirs $subdir"
4534
4535         # $gcc_subdir is where the gcc integration files are to be found
4536         # for a language, both for internal compiler purposes (compiler
4537         # sources implementing front-end to GCC tree converters), and for
4538         # build infrastructure purposes (Make-lang.in, etc.)
4539         #
4540         # This will be <subdir> (relative to $srcdir) if a line like
4541         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
4542         # is found in <langdir>/config-lang.in, and will remain <langdir>
4543         # otherwise.
4544         #
4545         # Except for the language alias (fetched above), the regular
4546         # "config-lang.in" contents are always retrieved from $gcc_subdir,
4547         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
4548         # only this and the language alias.
4549
4550         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
4551         if [ "$gcc_subdir" = "" ]; then
4552            gcc_subdir="$subdir"
4553         fi
4554
4555         case ",$enable_languages," in
4556         *,$lang_alias,*)
4557             all_selected_languages="$all_selected_languages $lang_alias"
4558             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
4559                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
4560             fi
4561             ;;
4562         esac
4563 changequote([,])dnl
4564
4565         language=
4566         boot_language=
4567         compilers=
4568         outputs=
4569         gtfiles=
4570         subdir_requires=
4571         . ${srcdir}/$gcc_subdir/config-lang.in
4572         if test "x$language" = x
4573         then
4574                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
4575                 exit 1
4576         fi
4577
4578         ok=:
4579         case ",$enable_languages," in
4580                 *,$lang_alias,*) ;;
4581                 *)
4582                         for i in $subdir_requires; do
4583                                 test -f "${srcdir}/$i/config-lang.in" && continue
4584                                 ok=false
4585                                 break
4586                         done
4587                 ;;
4588         esac
4589         $ok || continue
4590
4591         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
4592         if test -f $srcdir/$gcc_subdir/lang.opt; then
4593             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
4594             all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
4595         fi
4596         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
4597             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
4598         fi
4599         all_languages="$all_languages $language"
4600         all_compilers="$all_compilers $compilers"
4601         all_outputs="$all_outputs $outputs"
4602         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
4603         case ",$enable_languages," in
4604                 *,lto,*)
4605                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
4606                     enable_lto=yes
4607                     AC_SUBST(enable_lto)
4608                     ;;
4609                 *) ;;
4610         esac
4611 done
4612
4613 # Pick up gtfiles for c
4614 gtfiles=
4615 . ${srcdir}/c-config-lang.in
4616 all_gtfiles="$all_gtfiles [[c]] $gtfiles"
4617
4618 check_languages=
4619 for language in $all_selected_languages
4620 do
4621         check_languages="$check_languages check-$language"
4622 done
4623
4624 # We link each language in with a set of hooks, reached indirectly via
4625 # lang.${target}.  Only do so for selected languages.
4626
4627 rm -f Make-hooks
4628 touch Make-hooks
4629 target_list="all.cross start.encap rest.encap tags \
4630         install-common install-man install-info install-pdf install-html dvi \
4631         pdf html uninstall info man srcextra srcman srcinfo \
4632         mostlyclean clean distclean maintainer-clean install-plugin"
4633
4634 for t in $target_list
4635 do
4636         x=
4637         for lang in $all_selected_languages
4638         do
4639                 x="$x $lang.$t"
4640         done
4641         echo "lang.$t: $x" >> Make-hooks
4642 done
4643
4644 # --------
4645 # Option include files
4646 # --------
4647
4648 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
4649 option_includes="option-includes.mk"
4650 AC_SUBST_FILE(option_includes)
4651
4652 # --------
4653 # UNSORTED
4654 # --------
4655
4656 # Create .gdbinit.
4657
4658 echo "dir ." > .gdbinit
4659 echo "dir ${srcdir}" >> .gdbinit
4660 if test x$gdb_needs_out_file_path = xyes
4661 then
4662         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
4663 fi
4664 if test "x$subdirs" != x; then
4665         for s in $subdirs
4666         do
4667                 echo "dir ${srcdir}/$s" >> .gdbinit
4668         done
4669 fi
4670 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
4671
4672 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
4673 AC_SUBST(gcc_tooldir)
4674 AC_SUBST(dollar)
4675
4676 # Find a directory in which to install a shared libgcc.
4677
4678 AC_ARG_ENABLE(version-specific-runtime-libs,
4679 [  --enable-version-specific-runtime-libs
4680                           specify that runtime libraries should be
4681                           installed in a compiler-specific directory])
4682
4683 AC_ARG_WITH(slibdir,
4684 [  --with-slibdir=DIR      shared libraries in DIR [[LIBDIR]]],
4685 slibdir="$with_slibdir",
4686 if test "${enable_version_specific_runtime_libs+set}" = set; then
4687   slibdir='$(libsubdir)'
4688 elif test "$host" != "$target"; then
4689   slibdir='$(build_tooldir)/lib'
4690 else
4691   slibdir='$(libdir)'
4692 fi)
4693 AC_SUBST(slibdir)
4694
4695 # Substitute configuration variables
4696 AC_SUBST(subdirs)
4697 AC_SUBST(srcdir)
4698 AC_SUBST(all_compilers)
4699 AC_SUBST(all_gtfiles)
4700 AC_SUBST(all_lang_makefrags)
4701 AC_SUBST(all_languages)
4702 AC_SUBST(all_selected_languages)
4703 AC_SUBST(build_exeext)
4704 AC_SUBST(build_install_headers_dir)
4705 AC_SUBST(build_xm_file_list)
4706 AC_SUBST(build_xm_include_list)
4707 AC_SUBST(build_xm_defines)
4708 AC_SUBST(build_file_translate)
4709 AC_SUBST(check_languages)
4710 AC_SUBST(cpp_install_dir)
4711 AC_SUBST(xmake_file)
4712 AC_SUBST(tmake_file)
4713 AC_SUBST(TM_ENDIAN_CONFIG)
4714 AC_SUBST(TM_MULTILIB_CONFIG)
4715 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
4716 AC_SUBST(extra_gcc_objs)
4717 AC_SUBST(user_headers_inc_next_pre)
4718 AC_SUBST(user_headers_inc_next_post)
4719 AC_SUBST(extra_headers_list)
4720 AC_SUBST(extra_objs)
4721 AC_SUBST(extra_parts)
4722 AC_SUBST(extra_passes)
4723 AC_SUBST(extra_programs)
4724 AC_SUBST(float_h_file)
4725 AC_SUBST(gcc_config_arguments)
4726 AC_SUBST(gcc_gxx_include_dir)
4727 AC_SUBST(host_exeext)
4728 AC_SUBST(host_xm_file_list)
4729 AC_SUBST(host_xm_include_list)
4730 AC_SUBST(host_xm_defines)
4731 AC_SUBST(out_host_hook_obj)
4732 AC_SUBST(install)
4733 AC_SUBST(lang_opt_files)
4734 AC_SUBST(lang_specs_files)
4735 AC_SUBST(lang_tree_files)
4736 AC_SUBST(local_prefix)
4737 AC_SUBST(md_file)
4738 AC_SUBST(objc_boehm_gc)
4739 AC_SUBST(out_file)
4740 AC_SUBST(out_object_file)
4741 AC_SUBST(thread_file)
4742 AC_SUBST(tm_file_list)
4743 AC_SUBST(tm_include_list)
4744 AC_SUBST(tm_defines)
4745 AC_SUBST(tm_p_file_list)
4746 AC_SUBST(tm_p_include_list)
4747 AC_SUBST(xm_file_list)
4748 AC_SUBST(xm_include_list)
4749 AC_SUBST(xm_defines)
4750 AC_SUBST(use_gcc_stdint)
4751 AC_SUBST(c_target_objs)
4752 AC_SUBST(cxx_target_objs)
4753 AC_SUBST(fortran_target_objs)
4754 AC_SUBST(target_cpu_default)
4755
4756 AC_SUBST_FILE(language_hooks)
4757
4758 # Echo link setup.
4759 if test x${build} = x${host} ; then
4760   if test x${host} = x${target} ; then
4761     echo "Links are now set up to build a native compiler for ${target}." 1>&2
4762   else
4763     echo "Links are now set up to build a cross-compiler" 1>&2
4764     echo " from ${host} to ${target}." 1>&2
4765   fi
4766 else
4767   if test x${host} = x${target} ; then
4768     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
4769     echo " for ${target}." 1>&2
4770   else
4771     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
4772     echo " from ${host} to ${target}." 1>&2
4773   fi
4774 fi
4775
4776 AC_ARG_VAR(GMPLIBS,[How to link GMP])
4777 AC_ARG_VAR(GMPINC,[How to find GMP include files])
4778
4779 AC_ARG_VAR(PPLLIBS,[How to link PPL])
4780 AC_ARG_VAR(PPLINC,[How to find PPL include files])
4781
4782 AC_ARG_VAR(CLOOGLIBS,[How to link CLOOG])
4783 AC_ARG_VAR(CLOOGINC,[How to find CLOOG include files])
4784 if test "x${CLOOGLIBS}" != "x" ; then
4785    AC_DEFINE(HAVE_cloog, 1, [Define if cloog is in use.])
4786 fi
4787
4788 # Check for plugin support
4789 AC_ARG_ENABLE(plugin,
4790 [  --enable-plugin         enable plugin support],
4791 enable_plugin=$enableval,
4792 enable_plugin=yes; default_plugin=yes)
4793
4794 pluginlibs=
4795
4796 case "${host}" in
4797   *-*-darwin*)
4798     if test x$build = x$host; then
4799       export_sym_check="nm${exeext} -g"
4800     elif test x$host = x$target; then
4801       export_sym_check="$gcc_cv_nm -g"
4802     else
4803       export_sym_check=
4804     fi
4805   ;;
4806   *)
4807     if test x$build = x$host; then
4808       export_sym_check="objdump${exeext} -T"
4809     elif test x$host = x$target; then
4810       export_sym_check="$gcc_cv_objdump -T"
4811     else
4812       export_sym_check=
4813     fi
4814   ;;
4815 esac
4816
4817 if test x"$enable_plugin" = x"yes"; then
4818
4819   AC_MSG_CHECKING([for exported symbols])
4820   if test "x$export_sym_check" != x; then
4821     echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
4822     ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
4823     if $export_sym_check conftest | grep foobar > /dev/null; then
4824       : # No need to use a flag
4825       AC_MSG_RESULT([yes])
4826     else
4827       AC_MSG_RESULT([yes])
4828       AC_MSG_CHECKING([for -rdynamic])
4829       ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
4830       if $export_sym_check conftest | grep foobar > /dev/null; then
4831         plugin_rdynamic=yes
4832         pluginlibs="-rdynamic"
4833       else
4834         plugin_rdynamic=no
4835         enable_plugin=no
4836       fi
4837       AC_MSG_RESULT([$plugin_rdynamic])
4838     fi
4839   else
4840     AC_MSG_RESULT([unable to check])
4841   fi
4842
4843   # Check -ldl
4844   saved_LIBS="$LIBS"
4845   AC_SEARCH_LIBS([dlopen], [dl])
4846   if test x"$ac_cv_search_dlopen" = x"-ldl"; then
4847     pluginlibs="$pluginlibs -ldl"
4848   fi
4849   LIBS="$saved_LIBS"
4850
4851   # Check that we can build shared objects with -fPIC -shared
4852   saved_LDFLAGS="$LDFLAGS"
4853   saved_CFLAGS="$CFLAGS"
4854   case "${host}" in
4855     *-*-darwin*)
4856       CFLAGS=`echo $CFLAGS | sed s/-mdynamic-no-pic//g`
4857       CFLAGS="$CFLAGS -fPIC"
4858       LDFLAGS="$LDFLAGS -shared -undefined dynamic_lookup"
4859     ;;
4860     *)
4861       CFLAGS="$CFLAGS -fPIC"
4862       LDFLAGS="$LDFLAGS -fPIC -shared"
4863     ;;
4864   esac
4865   AC_MSG_CHECKING([for -fPIC -shared])
4866   AC_TRY_LINK(
4867     [extern int X;],[return X == 0;],
4868     [AC_MSG_RESULT([yes]); have_pic_shared=yes],
4869     [AC_MSG_RESULT([no]); have_pic_shared=no])
4870   if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
4871     pluginlibs=
4872     enable_plugin=no
4873   fi
4874   LDFLAGS="$saved_LDFLAGS"
4875   CFLAGS="$saved_CFLAGS"
4876
4877   # If plugin support had been requested but not available, fail.
4878   if test x"$enable_plugin" = x"no" ; then
4879     if test x"$default_plugin" != x"yes"; then
4880       AC_MSG_ERROR([
4881 Building GCC with plugin support requires a host that supports
4882 -fPIC, -shared, -ldl and -rdynamic.])
4883     fi
4884   fi
4885 fi
4886
4887 AC_SUBST(pluginlibs)
4888 AC_SUBST(enable_plugin)
4889 if test x"$enable_plugin" = x"yes"; then
4890   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
4891 fi
4892
4893
4894 AC_ARG_ENABLE(libquadmath-support,
4895 [AS_HELP_STRING([--disable-libquadmath-support],
4896   [disable libquadmath support for Fortran])],
4897 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
4898 ENABLE_LIBQUADMATH_SUPPORT=yes)
4899 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
4900   AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
4901             [Define to 1 to enable libquadmath support])
4902 fi
4903
4904
4905 # Configure the subdirectories
4906 # AC_CONFIG_SUBDIRS($subdirs)
4907
4908 # Create the Makefile
4909 # and configure language subdirectories
4910 AC_CONFIG_FILES($all_outputs)
4911
4912 AC_CONFIG_COMMANDS([default],
4913 [
4914 case ${CONFIG_HEADERS} in
4915   *auto-host.h:config.in*)
4916   echo > cstamp-h ;;
4917 esac
4918 # Make sure all the subdirs exist.
4919 for d in $subdirs doc build c-family
4920 do
4921     test -d $d || mkdir $d
4922 done
4923 ],
4924 [subdirs='$subdirs'])
4925 AC_OUTPUT
4926