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 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 # sizeof(char) is 1 by definition.
 308 AC_CHECK_SIZEOF(void *)
 309 AC_CHECK_SIZEOF(short)
 310 AC_CHECK_SIZEOF(int)
 311 AC_CHECK_SIZEOF(long)
 312 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 313 AC_CHECK_TYPES([__int64], [AC_CHECK_SIZEOF(__int64)])
 314 GCC_STDINT_TYPES
 315
 316 # ---------------------
 317 # Warnings and checking
 318 # ---------------------
 319
 320 # Check $CC warning features (if it's GCC).
 321 # We want to use -pedantic, but we don't want warnings about
 322 # * 'long long'
 323 # * variadic macros
 324 # * overlong strings
 325 # So, we only use -pedantic if we can disable those warnings.
 326
 327 ACX_PROG_CC_WARNING_OPTS(
 328         m4_quote(m4_do([-W -Wall -Wwrite-strings -Wcast-qual])), [loose_warn])
 329 ACX_PROG_CC_WARNING_OPTS(
 330         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
 331         [c_loose_warn])
 332 ACX_PROG_CC_WARNING_OPTS(
 333         m4_quote(m4_do([-Wmissing-format-attribute])), [strict_warn])
 334 ACX_PROG_CC_WARNING_OPTS(
 335         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 336 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC(
 337         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 338                        [-Wno-overlength-strings])), [strict_warn])
 339 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 340
 341 # The above macros do nothing if the compiler is not GCC.  However, the
 342 # Makefile has more goo to add other flags, so these variables are used
 343 # to enable warnings only for GCC.
 344 warn_cflags=
 345 warn_cxxflags=
 346 if test "x$GCC" = "xyes"; then
 347   warn_cflags='$(GCC_WARN_CFLAGS)'
 348   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 349 fi
 350 AC_SUBST(warn_cflags)
 351 AC_SUBST(warn_cxxflags)
 352
 353 # Enable expensive internal checks
 354 is_release=
 355 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 356   is_release=yes
 357 fi
 358
 359 AC_ARG_ENABLE(checking,
 360 [  --enable-checking[=LIST]
 361                           enable expensive run-time checks.  With LIST,
 362                           enable only specific categories of checks.
 363                           Categories are: yes,no,all,none,release.
 364                           Flags are: assert,df,fold,gc,gcac,gimple,misc,
 365                           rtlflag,rtl,runtime,tree,valgrind,types.],
 366 [ac_checking_flags="${enableval}"],[
 367 # Determine the default checks.
 368 if test x$is_release = x ; then
 369   ac_checking_flags=yes
 370 else
 371   ac_checking_flags=release
 372 fi])
 373 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 374 for check in release $ac_checking_flags
 375 do
 376         case $check in
 377         # these set all the flags to specific states
 378         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 379                         ac_fold_checking= ; ac_gc_checking=1 ;
 380                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 381                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 382                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 383                         ac_types_checking=1 ;;
 384         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 385                         ac_fold_checking= ; ac_gc_checking= ;
 386                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 387                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 388                         ac_tree_checking= ; ac_valgrind_checking= ;
 389                         ac_types_checking= ;;
 390         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 391                         ac_fold_checking=1 ; ac_gc_checking=1 ;
 392                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 393                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 394                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 395                         ac_types_checking=1 ;;
 396         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 397                         ac_fold_checking= ; ac_gc_checking= ;
 398                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 399                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 400                         ac_tree_checking= ; ac_valgrind_checking= ;
 401                         ac_types_checking= ;;
 402         # these enable particular checks
 403         assert)         ac_assert_checking=1 ;;
 404         df)             ac_df_checking=1 ;;
 405         fold)           ac_fold_checking=1 ;;
 406         gc)             ac_gc_checking=1 ;;
 407         gcac)           ac_gc_always_collect=1 ;;
 408         gimple)         ac_gimple_checking=1 ;;
 409         misc)           ac_checking=1 ;;
 410         rtl)            ac_rtl_checking=1 ;;
 411         rtlflag)        ac_rtlflag_checking=1 ;;
 412         runtime)        ac_runtime_checking=1 ;;
 413         tree)           ac_tree_checking=1 ;;
 414         types)          ac_types_checking=1 ;;
 415         valgrind)       ac_valgrind_checking=1 ;;
 416         *)      AC_MSG_ERROR(unknown check category $check) ;;
 417         esac
 418 done
 419 IFS="$ac_save_IFS"
 420
 421 nocommon_flag=""
 422 if test x$ac_checking != x ; then
 423   AC_DEFINE(ENABLE_CHECKING, 1,
 424 [Define if you want more run-time sanity checks.  This one gets a grab
 425    bag of miscellaneous but relatively cheap checks.])
 426   nocommon_flag=-fno-common
 427 fi
 428 AC_SUBST(nocommon_flag)
 429 if test x$ac_df_checking != x ; then
 430   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 431 [Define if you want more run-time sanity checks for dataflow.])
 432 fi
 433 if test x$ac_assert_checking != x ; then
 434   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 435 [Define if you want assertions enabled.  This is a cheap check.])
 436 fi
 437 if test x$ac_gimple_checking != x ; then
 438   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 439 [Define if you want operations on GIMPLE (the basic data structure of
 440 the high-level optimizers) to be checked for dynamic type safety at
 441 runtime.  This is moderately expensive.])
 442 fi
 443 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 444 if test x$ac_runtime_checking != x ; then
 445   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 446 [Define if you want runtime assertions enabled.  This is a cheap check.])
 447 fi
 448 if test x$ac_tree_checking != x ; then
 449   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 450 [Define if you want all operations on trees (the basic data
 451    structure of the front ends) to be checked for dynamic type safety
 452    at runtime.  This is moderately expensive.  The tree browser debugging
 453    routines will also be enabled by this option.
 454    ])
 455   TREEBROWSER=tree-browser.o
 456 fi
 457 if test x$ac_types_checking != x ; then
 458   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 459 [Define if you want all gimple types to be verified after gimplifiation.
 460    This is cheap.
 461    ])
 462 fi
 463 AC_SUBST(TREEBROWSER)
 464 if test x$ac_rtl_checking != x ; then
 465   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 466 [Define if you want all operations on RTL (the basic data structure
 467    of the optimizer and back end) to be checked for dynamic type safety
 468    at runtime.  This is quite expensive.])
 469 fi
 470 if test x$ac_rtlflag_checking != x ; then
 471   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 472 [Define if you want RTL flag accesses to be checked against the RTL
 473    codes that are supported for each access macro.  This is relatively
 474    cheap.])
 475 fi
 476 if test x$ac_gc_checking != x ; then
 477   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 478 [Define if you want the garbage collector to do object poisoning and
 479    other memory allocation checks.  This is quite expensive.])
 480 fi
 481 if test x$ac_gc_always_collect != x ; then
 482   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 483 [Define if you want the garbage collector to operate in maximally
 484    paranoid mode, validating the entire heap and collecting garbage at
 485    every opportunity.  This is extremely expensive.])
 486 fi
 487 if test x$ac_fold_checking != x ; then
 488   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 489 [Define if you want fold checked that it never destructs its argument.
 490    This is quite expensive.])
 491 fi
 492 valgrind_path_defines=
 493 valgrind_command=
 494
 495 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 496 dnl # an if statement.  This was the source of very frustrating bugs
 497 dnl # in converting to autoconf 2.5x!
 498 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 499
 500 if test x$ac_valgrind_checking != x ; then
 501   # It is certainly possible that there's valgrind but no valgrind.h.
 502   # GCC relies on making annotations so we must have both.
 503   AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 504   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 505     [[#include <valgrind/memcheck.h>
 506 #ifndef VALGRIND_DISCARD
 507 #error VALGRIND_DISCARD not defined
 508 #endif]])],
 509   [gcc_cv_header_valgrind_memcheck_h=yes],
 510   [gcc_cv_header_valgrind_memcheck_h=no])
 511   AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 512   AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 513   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 514     [[#include <memcheck.h>
 515 #ifndef VALGRIND_DISCARD
 516 #error VALGRIND_DISCARD not defined
 517 #endif]])],
 518   [gcc_cv_header_memcheck_h=yes],
 519   [gcc_cv_header_memcheck_h=no])
 520   AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 521   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 522         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 523   if test "x$valgrind_path" = "x" \
 524     || (test $have_valgrind_h = no \
 525         && test $gcc_cv_header_memcheck_h = no \
 526         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 527         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 528   fi
 529   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 530   valgrind_command="$valgrind_path -q"
 531   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 532 [Define if you want to run subprograms and generated programs
 533    through valgrind (a memory checker).  This is extremely expensive.])
 534   if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 535     AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 536         [Define if valgrind's valgrind/memcheck.h header is installed.])
 537   fi
 538   if test $gcc_cv_header_memcheck_h = yes; then
 539     AC_DEFINE(HAVE_MEMCHECK_H, 1,
 540         [Define if valgrind's memcheck.h header is installed.])
 541   fi
 542 fi
 543 AC_SUBST(valgrind_path_defines)
 544 AC_SUBST(valgrind_command)
 545
 546 # Enable code coverage collection
 547 AC_ARG_ENABLE(coverage,
 548 [  --enable-coverage[=LEVEL]
 549                           enable compiler's code coverage collection.
 550                           Use to measure compiler performance and locate
 551                           unused parts of the compiler. With LEVEL, specify
 552                           optimization. Values are opt, noopt,
 553                           default is noopt],
 554 [case "${enableval}" in
 555   yes|noopt)
 556     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
 557     ;;
 558   opt)
 559     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
 560     ;;
 561   no)
 562     # a.k.a. --disable-coverage
 563     coverage_flags=""
 564     ;;
 565   *)
 566     AC_MSG_ERROR(unknown coverage setting $enableval)
 567     ;;
 568 esac],
 569 [coverage_flags=""])
 570 AC_SUBST(coverage_flags)
 571
 572 AC_ARG_ENABLE(gather-detailed-mem-stats,
 573 [  --enable-gather-detailed-mem-stats         enable detailed memory allocation stats gathering], [],
 574 [enable_gather_detailed_mem_stats=no])
 575 if test x$enable_gather_detailed_mem_stats = xyes ; then
 576   AC_DEFINE(GATHER_STATISTICS, 1,
 577         [Define to enable detailed memory allocation stats gathering.])
 578 fi
 579
 580 # -------------------------------
 581 # Miscenalleous configure options
 582 # -------------------------------
 583
 584 # See if we are building gcc with C++.
 585 AC_ARG_ENABLE(build-with-cxx,
 586 [  --enable-build-with-cxx build with C++ compiler instead of C compiler],
 587 ENABLE_BUILD_WITH_CXX=$enableval,
 588 ENABLE_BUILD_WITH_CXX=no)
 589 AC_SUBST(ENABLE_BUILD_WITH_CXX)
 590
 591 # With stabs
 592 AC_ARG_WITH(stabs,
 593 [  --with-stabs            arrange to use stabs instead of host debug format],
 594 stabs="$with_stabs",
 595 stabs=no)
 596
 597 # Determine whether or not multilibs are enabled.
 598 AC_ARG_ENABLE(multilib,
 599 [  --enable-multilib       enable library support for multiple ABIs],
 600 [], [enable_multilib=yes])
 601 AC_SUBST(enable_multilib)
 602
 603 # Enable __cxa_atexit for C++.
 604 AC_ARG_ENABLE(__cxa_atexit,
 605 [  --enable-__cxa_atexit   enable __cxa_atexit for C++],
 606 [], [])
 607
 608 # Enable C extension for decimal float if target supports it.
 609 AC_ARG_ENABLE(decimal-float,
 610 [  --enable-decimal-float={no,yes,bid,dpd}
 611                         enable decimal float extension to C.  Selecting 'bid'
 612                         or 'dpd' choses which decimal floating point format
 613                         to use],
 614 [
 615   case $enable_decimal_float in
 616     yes | no | bid | dpd) ;;
 617     *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
 618 Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
 619   esac
 620 ],
 621 [
 622   case $target in
 623     powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
 624       enable_decimal_float=yes
 625       ;;
 626     *)
 627       AC_MSG_WARN(decimal float is not supported for this target, ignored)
 628       enable_decimal_float=no
 629       ;;
 630   esac
 631 ])
 632
 633 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 634 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 635 [Define to 1 to enable decimal float extension to C.])
 636
 637 # x86's use BID format instead of DPD
 638 case x$enable_decimal_float in
 639   xyes)
 640     case $target in
 641       i?86*-*-linux* | x86_64*-*-linux*)
 642         enable_decimal_float=bid
 643         ;;
 644       *)
 645         enable_decimal_float=dpd
 646         ;;
 647     esac
 648     ;;
 649   xno)
 650     # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
 651     # dependency on libdecnumber.
 652     enable_decimal_float=dpd
 653     ;;
 654 esac
 655 AC_SUBST(enable_decimal_float)
 656
 657 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 658 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 659 [Define to 1 to specify that we are using the BID decimal floating
 660 point format instead of DPD])
 661
 662 # Enable C extension for fixed-point arithmetic.
 663 AC_ARG_ENABLE(fixed-point,
 664 [  --enable-fixed-point    enable fixed-point arithmetic extension to C],
 665 [
 666 ],
 667 [
 668   case $target in
 669     mips*-*-*)
 670       case $host in
 671         mips*-sgi-irix*)
 672           AC_MSG_WARN(fixed-point is not supported on IRIX, ignored)
 673           enable_fixed_point=no
 674           ;;
 675         *)
 676           enable_fixed_point=yes
 677           ;;
 678       esac
 679       ;;
 680     *)
 681       AC_MSG_WARN(fixed-point is not supported for this target, ignored)
 682       enable_fixed_point=no
 683       ;;
 684   esac
 685 ])
 686 AC_SUBST(enable_fixed_point)
 687
 688 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 689 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 690 [Define to 1 to enable fixed-point arithmetic extension to C.])
 691
 692 # Enable threads
 693 # Pass with no value to take the default
 694 # Pass with a value to specify a thread package
 695 AC_ARG_ENABLE(threads,
 696 [  --enable-threads        enable thread usage for target GCC
 697   --enable-threads=LIB    use LIB thread package for target GCC],,
 698 [enable_threads=''])
 699
 700 AC_ARG_ENABLE(tls,
 701 [  --enable-tls            enable or disable generation of tls code
 702                           overriding the assembler check for tls support],
 703 [
 704   case $enable_tls in
 705     yes | no) ;;
 706     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 707 Valid choices are 'yes' and 'no'.]) ;;
 708   esac
 709 ], [enable_tls=''])
 710
 711 AC_ARG_ENABLE(objc-gc,
 712 [  --enable-objc-gc       enable the use of Boehm's garbage collector with
 713                           the GNU Objective-C runtime],
 714 if test x$enable_objc_gc = xno; then
 715         objc_boehm_gc=''
 716 else
 717         objc_boehm_gc=1
 718 fi,
 719 objc_boehm_gc='')
 720
 721 AC_ARG_WITH(dwarf2,
 722 [  --with-dwarf2           force the default debug format to be DWARF 2],
 723 dwarf2="$with_dwarf2",
 724 dwarf2=no)
 725
 726 AC_ARG_ENABLE(shared,
 727 [  --disable-shared        don't provide a shared libgcc],
 728 [
 729   case $enable_shared in
 730   yes | no) ;;
 731   *)
 732     enable_shared=no
 733     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 734     for pkg in $enableval; do
 735       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 736         enable_shared=yes
 737       fi
 738     done
 739     IFS="$ac_save_ifs"
 740     ;;
 741   esac
 742 ], [enable_shared=yes])
 743 AC_SUBST(enable_shared)
 744
 745 AC_ARG_WITH(build-sysroot,
 746   [  --with-build-sysroot=sysroot
 747                           use sysroot as the system root during the build])
 748
 749 AC_ARG_WITH(sysroot,
 750 [  --with-sysroot[=DIR] Search for usr/lib, usr/include, et al, within DIR.],
 751 [
 752  case ${with_sysroot} in
 753  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 754  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 755  esac
 756
 757  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 758  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 759
 760  if test "x$prefix" = xNONE; then
 761   test_prefix=/usr/local
 762  else
 763   test_prefix=$prefix
 764  fi
 765  if test "x$exec_prefix" = xNONE; then
 766   test_exec_prefix=$test_prefix
 767  else
 768   test_exec_prefix=$exec_prefix
 769  fi
 770  case ${TARGET_SYSTEM_ROOT} in
 771  "${test_prefix}"|"${test_prefix}/"*|\
 772  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 773  '${prefix}'|'${prefix}/'*|\
 774  '${exec_prefix}'|'${exec_prefix}/'*)
 775    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 776    TARGET_SYSTEM_ROOT_DEFINE="$t"
 777    ;;
 778  esac
 779 ], [
 780  TARGET_SYSTEM_ROOT=
 781  TARGET_SYSTEM_ROOT_DEFINE=
 782  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 783 ])
 784 AC_SUBST(TARGET_SYSTEM_ROOT)
 785 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 786 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 787
 788 AC_ARG_WITH(specs,
 789   [AS_HELP_STRING([--with-specs=SPECS],
 790                   [add SPECS to driver command-line processing])],
 791   [CONFIGURE_SPECS=$withval],
 792   [CONFIGURE_SPECS=]
 793 )
 794 AC_SUBST(CONFIGURE_SPECS)
 795
 796 # Build with intermodule optimisations
 797 AC_ARG_ENABLE(intermodule,
 798 [  --enable-intermodule    build the compiler in one step],
 799 [case ${enable_intermodule} in
 800   yes) onestep="-onestep";;
 801   *) onestep="";;
 802 esac],
 803 [onestep=""])
 804 AC_SUBST(onestep)
 805
 806 ACX_PKGVERSION([GCC])
 807 ACX_BUGURL([http://gcc.gnu.org/bugs.html])
 808
 809 # Sanity check enable_languages in case someone does not run the toplevel
 810 # configure # script.
 811 AC_ARG_ENABLE(languages,
 812 [  --enable-languages=LIST specify which front-ends to build],
 813 [case ,${enable_languages}, in
 814        ,,|,yes,)
 815                 # go safe -- we cannot be much sure without the toplevel
 816                 # configure's
 817                 # analysis of which target libs are present and usable
 818                 enable_languages=c
 819                 ;;
 820          *,all,*)
 821                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 822                 ;;
 823         *,c,*)
 824                 ;;
 825         *)
 826                 enable_languages=c,${enable_languages}
 827                 ;;
 828 esac],
 829 [enable_languages=c])
 830
 831 AC_ARG_WITH(multilib-list,
 832 [  --with-multilib-list    Select multilibs (SH only)],
 833 :,
 834 with_multilib_list=default)
 835
 836 # -------------------------
 837 # Checks for other programs
 838 # -------------------------
 839
 840 AC_PROG_MAKE_SET
 841
 842 # Find some useful tools
 843 AC_PROG_AWK
 844 # We need awk to create options.c and options.h.
 845 # Bail out if it's missing.
 846 case ${AWK} in
 847   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
 848 esac
 849
 850 gcc_AC_PROG_LN_S
 851 ACX_PROG_LN($LN_S)
 852 AC_PROG_RANLIB
 853 case "${host}" in
 854 *-*-darwin*)
 855   # By default, the Darwin ranlib will not treat common symbols as
 856   # definitions when  building the archive table of contents.  Other
 857   # ranlibs do that; pass an option to the Darwin ranlib that makes
 858   # it behave similarly.
 859   ranlib_flags="-c"
 860   ;;
 861 *)
 862   ranlib_flags=""
 863 esac
 864 AC_SUBST(ranlib_flags)
 865
 866 gcc_AC_PROG_INSTALL
 867
 868 # See if cmp has --ignore-initial.
 869 gcc_AC_PROG_CMP_IGNORE_INITIAL
 870
 871 # See if we have the mktemp command.
 872 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
 873
 874 # See if makeinfo has been installed and is modern enough
 875 # that we can use it.
 876 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
 877   [GNU texinfo.* \([0-9][0-9.]*\)],
 878   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
 879 if test $gcc_cv_prog_makeinfo_modern = no; then
 880   AC_MSG_WARN([
 881 *** Makeinfo is missing or too old.
 882 *** Info documentation will not be built.])
 883   BUILD_INFO=
 884 else
 885   BUILD_INFO=info
 886 fi
 887 AC_SUBST(BUILD_INFO)
 888
 889 # Is pod2man recent enough to regenerate manpages?
 890 AC_MSG_CHECKING([for recent Pod::Man])
 891 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
 892   AC_MSG_RESULT(yes)
 893   GENERATED_MANPAGES=generated-manpages
 894 else
 895   AC_MSG_RESULT(no)
 896   GENERATED_MANPAGES=
 897 fi
 898 AC_SUBST(GENERATED_MANPAGES)
 899
 900 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
 901
 902 # How about lex?
 903 dnl Don't use AC_PROG_LEX; we insist on flex.
 904 dnl LEXLIB is not useful in gcc.
 905 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
 906
 907 # Bison?
 908 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
 909
 910 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
 911 # check for build == host before using them.
 912
 913 # NM
 914 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
 915   && test -d ../binutils ; then
 916   NM='${objdir}/../binutils/nm-new'
 917 else
 918   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
 919 fi
 920
 921 # AR
 922 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
 923   && test -d ../binutils ; then
 924   AR='${objdir}/../binutils/ar'
 925 else
 926   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
 927 fi
 928
 929
 930 # --------------------
 931 # Checks for C headers
 932 # --------------------
 933
 934 # Need to reject headers which give warnings, so that the -Werror bootstrap
 935 # works later. *sigh*  This needs to come before all header checks.
 936 AC_PROG_CPP_WERROR
 937
 938 AC_HEADER_STDC
 939 AC_HEADER_TIME
 940 ACX_HEADER_STRING
 941 AC_HEADER_SYS_WAIT
 942 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
 943                  fcntl.h unistd.h sys/file.h sys/time.h sys/mman.h \
 944                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
 945                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
 946
 947 # Check for thread headers.
 948 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
 949 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
 950
 951 # These tests can't be done till we know if we have limits.h.
 952 gcc_AC_C_CHAR_BIT
 953 AC_C_BIGENDIAN
 954
 955 # --------
 956 # UNSORTED
 957 # --------
 958
 959
 960 # These libraries may be used by collect2.
 961 # We may need a special search path to get them linked.
 962 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
 963 [save_LIBS="$LIBS"
 964 for libs in '' -lld -lmld \
 965                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
 966                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
 967 do
 968         LIBS="$libs"
 969         AC_TRY_LINK_FUNC(ldopen,
 970                 [gcc_cv_collect2_libs="$libs"; break])
 971 done
 972 LIBS="$save_LIBS"
 973 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
 974 case $gcc_cv_collect2_libs in
 975         "none required")        ;;
 976         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
 977 esac
 978 AC_SUBST(COLLECT2_LIBS)
 979
 980 # When building Ada code on Alpha, we need exc_resume which is usually in
 981 # -lexc.  So test for it.
 982 save_LIBS="$LIBS"
 983 LIBS=
 984 AC_SEARCH_LIBS(exc_resume, exc)
 985 GNAT_LIBEXC="$LIBS"
 986 LIBS="$save_LIBS"
 987 AC_SUBST(GNAT_LIBEXC)
 988
 989 # Some systems put ldexp and frexp in libm instead of libc; assume
 990 # they're both in the same place.  jcf-dump needs them.
 991 save_LIBS="$LIBS"
 992 LIBS=
 993 AC_SEARCH_LIBS(ldexp, m)
 994 LDEXP_LIB="$LIBS"
 995 LIBS="$save_LIBS"
 996 AC_SUBST(LDEXP_LIB)
 997
 998 # Use <inttypes.h> only if it exists,
 999 # doesn't clash with <sys/types.h>, and declares intmax_t.
1000 AC_MSG_CHECKING(for inttypes.h)
1001 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1002 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1003 [[#include <sys/types.h>
1004 #include <inttypes.h>]],
1005   [[intmax_t i = -1;]])],
1006   [gcc_cv_header_inttypes_h=yes],
1007   [gcc_cv_header_inttypes_h=no])])
1008 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1009 if test $gcc_cv_header_inttypes_h = yes; then
1010   AC_DEFINE(HAVE_INTTYPES_H, 1,
1011         [Define if you have a working <inttypes.h> header file.])
1012 fi
1013
1014 dnl Disabled until we have a complete test for buggy enum bitfields.
1015 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1016
1017 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1018   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1019   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1020   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1021   putchar_unlocked putc_unlocked)
1022 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
1023         sysconf strsignal getrusage nl_langinfo \
1024         gettimeofday mbstowcs wcswidth mmap mincore setlocale \
1025         gcc_UNLOCKED_FUNCS)
1026
1027 save_CPPFLAGS="$CPPFLAGS"
1028 save_LIBS="$LIBS"
1029 LIBS="$LIBS $LIBELFLIBS"
1030 AC_CHECK_FUNCS(elf_getshdrstrndx,,
1031   [AC_CHECK_FUNCS(elf_getshstrndx,
1032     [AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1033 #include <libelf.h>
1034 int main()
1035 {
1036   return elf_getshstrndx (NULL, 0) == 0;
1037 }]])], AC_DEFINE(HAVE_ELF_GETSHSTRNDX_GABI, 1,
1038         [Define if elf_getshstrndx has gABI conformant return values.]))])]
1039   )
1040 LIBS="$save_LIBS"
1041 CPPFLAGS="$save_CPPFLAGS"
1042
1043 if test x$ac_cv_func_mbstowcs = xyes; then
1044   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1045 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1046 int main()
1047 {
1048   mbstowcs(0, "", 0);
1049   return 0;
1050 }]])],
1051     [gcc_cv_func_mbstowcs_works=yes],
1052     [gcc_cv_func_mbstowcs_works=no],
1053     [gcc_cv_func_mbstowcs_works=yes])])
1054   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1055     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1056   [Define this macro if mbstowcs does not crash when its
1057    first argument is NULL.])
1058   fi
1059 fi
1060
1061 AC_CHECK_TYPE(ssize_t, int)
1062 AC_CHECK_TYPE(caddr_t, char *)
1063
1064 gcc_AC_FUNC_MMAP_BLACKLIST
1065
1066 case "${host}" in
1067 *-*-*vms*)
1068   # Under VMS, vfork works very differently than on Unix. The standard test
1069   # won't work, and it isn't easily adaptable. It makes more sense to
1070   # just force it.
1071   ac_cv_func_vfork_works=yes
1072   ;;
1073 esac
1074 AC_FUNC_FORK
1075
1076 AM_ICONV
1077 # Until we have in-tree GNU iconv:
1078 LIBICONV_DEP=
1079 AC_SUBST(LIBICONV_DEP)
1080
1081 AM_LC_MESSAGES
1082
1083 AM_LANGINFO_CODESET
1084
1085 # We will need to find libiberty.h and ansidecl.h
1086 saved_CFLAGS="$CFLAGS"
1087 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
1088 gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
1089         strsignal strstr strverscmp \
1090         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1091         free basename getopt clock getpagesize gcc_UNLOCKED_FUNCS, , ,[
1092 #include "ansidecl.h"
1093 #include "system.h"])
1094
1095 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1096 #include "ansidecl.h"
1097 #include "system.h"
1098 #ifdef HAVE_SYS_RESOURCE_H
1099 #include <sys/resource.h>
1100 #endif
1101 ])
1102
1103 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1104 #include "ansidecl.h"
1105 #include "system.h"
1106 #ifdef HAVE_SYS_RESOURCE_H
1107 #include <sys/resource.h>
1108 #endif
1109 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1110 [Define to `long' if <sys/resource.h> doesn't define.])])
1111
1112 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1113 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1114 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1115 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1116 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1117 #include "ansidecl.h"
1118 #include "system.h"
1119 #ifdef HAVE_LDFCN_H
1120 #undef FREAD
1121 #undef FWRITE
1122 #include <ldfcn.h>
1123 #endif
1124 ])
1125
1126 gcc_AC_CHECK_DECLS(times, , ,[
1127 #include "ansidecl.h"
1128 #include "system.h"
1129 #ifdef HAVE_SYS_TIMES_H
1130 #include <sys/times.h>
1131 #endif
1132 ])
1133
1134 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1135 #include "ansidecl.h"
1136 #include "system.h"
1137 #include <signal.h>
1138 ])
1139
1140 # More time-related stuff.
1141 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1142 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1143 #include "ansidecl.h"
1144 #include "system.h"
1145 #ifdef HAVE_SYS_TIMES_H
1146 #include <sys/times.h>
1147 #endif
1148 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1149 if test $ac_cv_struct_tms = yes; then
1150   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1151   [Define if <sys/times.h> defines struct tms.])
1152 fi
1153
1154 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1155 # revisit after autoconf 2.50.
1156 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1157 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1158 #include "ansidecl.h"
1159 #include "system.h"
1160 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1161 if test $gcc_cv_type_clock_t = yes; then
1162   AC_DEFINE(HAVE_CLOCK_T, 1,
1163   [Define if <time.h> defines clock_t.])
1164 fi
1165
1166 # Restore CFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1167 CFLAGS="$saved_CFLAGS"
1168
1169 gcc_AC_INITFINI_ARRAY
1170
1171 # mkdir takes a single argument on some systems.
1172 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1173
1174 # File extensions
1175 manext='.1'
1176 objext='.o'
1177 AC_SUBST(manext)
1178 AC_SUBST(objext)
1179
1180 # With Setjmp/Longjmp based exception handling.
1181 AC_ARG_ENABLE(sjlj-exceptions,
1182 [  --enable-sjlj-exceptions
1183                           arrange to use setjmp/longjmp exception handling],
1184 [case $target in
1185   *-*-hpux10*)
1186     if test $enableval != yes; then
1187       AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1188       enableval=yes
1189     fi
1190     ;;
1191 esac
1192 force_sjlj_exceptions=yes],
1193 [case $target in
1194   *-*-hpux10*)
1195     force_sjlj_exceptions=yes
1196     enableval=yes
1197     ;;
1198   *)
1199     force_sjlj_exceptions=no
1200     ;;
1201 esac])
1202 if test $force_sjlj_exceptions = yes; then
1203   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1204   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1205     [Define 0/1 to force the choice for exception handling model.])
1206 fi
1207
1208 # For platforms with the unwind ABI which includes an unwind library,
1209 # libunwind, we can choose to use the system libunwind.
1210 # config.gcc also contains tests of with_system_libunwind.
1211 GCC_CHECK_UNWIND_GETIPINFO
1212
1213 # --------------------------------------------------------
1214 # Build, host, and target specific configuration fragments
1215 # --------------------------------------------------------
1216
1217 # Collect build-machine-specific information.
1218 . ${srcdir}/config.build
1219
1220 # Collect host-machine-specific information.
1221 . ${srcdir}/config.host
1222
1223 target_gtfiles=
1224
1225 # Collect target-machine-specific information.
1226 . ${srcdir}/config.gcc
1227
1228 extra_objs="${host_extra_objs} ${extra_objs}"
1229 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1230
1231 # Default the target-machine variables that were not explicitly set.
1232 if test x"$tm_file" = x
1233 then tm_file=$cpu_type/$cpu_type.h; fi
1234
1235 if test x"$extra_headers" = x
1236 then extra_headers=; fi
1237
1238 if test x$md_file = x
1239 then md_file=$cpu_type/$cpu_type.md; fi
1240
1241 if test x$out_file = x
1242 then out_file=$cpu_type/$cpu_type.c; fi
1243
1244 if test x"$tmake_file" = x
1245 then tmake_file=$cpu_type/t-$cpu_type
1246 fi
1247
1248 if test x"$dwarf2" = xyes
1249 then tm_file="$tm_file tm-dwarf2.h"
1250 fi
1251
1252 # Say what files are being used for the output code and MD file.
1253 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1254 echo "Using \`$srcdir/config/$md_file' as machine description file."
1255
1256 # If any of the xm_file variables contain nonexistent files, warn
1257 # about them and drop them.
1258
1259 bx=
1260 for x in $build_xm_file; do
1261   if    test -f $srcdir/config/$x
1262   then      bx="$bx $x"
1263   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1264   fi
1265 done
1266 build_xm_file="$bx"
1267
1268 hx=
1269 for x in $host_xm_file; do
1270   if    test -f $srcdir/config/$x
1271   then      hx="$hx $x"
1272   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1273   fi
1274 done
1275 host_xm_file="$hx"
1276
1277 tx=
1278 for x in $xm_file; do
1279   if    test -f $srcdir/config/$x
1280   then      tx="$tx $x"
1281   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1282   fi
1283 done
1284 xm_file="$tx"
1285
1286 count=a
1287 for f in $tm_file; do
1288         count=${count}x
1289 done
1290 if test $count = ax; then
1291         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1292 else
1293         echo "Using the following target machine macro files:"
1294         for f in $tm_file; do
1295                 echo "  $srcdir/config/$f"
1296         done
1297 fi
1298
1299 if test x$need_64bit_hwint = xyes; then
1300         AC_DEFINE(NEED_64BIT_HOST_WIDE_INT, 1,
1301 [Define to 1 if HOST_WIDE_INT must be 64 bits wide (see hwint.h).])
1302 fi
1303
1304 if test x$use_long_long_for_widest_fast_int = xyes; then
1305         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1306 [Define to 1 if the 'long long' (or '__int64') is wider than 'long' but still
1307 efficiently supported by the host hardware.])
1308 fi
1309
1310 count=a
1311 for f in $host_xm_file; do
1312         count=${count}x
1313 done
1314 if test $count = a; then
1315         :
1316 elif test $count = ax; then
1317         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1318 else
1319         echo "Using the following host machine macro files:"
1320         for f in $host_xm_file; do
1321                 echo "  $srcdir/config/$f"
1322         done
1323 fi
1324 echo "Using ${out_host_hook_obj} for host machine hooks."
1325
1326 if test "$host_xm_file" != "$build_xm_file"; then
1327         count=a
1328         for f in $build_xm_file; do
1329                 count=${count}x
1330         done
1331         if test $count = a; then
1332                 :
1333         elif test $count = ax; then
1334                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1335         else
1336                 echo "Using the following build machine macro files:"
1337                 for f in $build_xm_file; do
1338                         echo "  $srcdir/config/$f"
1339                 done
1340         fi
1341 fi
1342
1343 case ${host} in
1344   powerpc*-*-darwin*)
1345     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1346       gcc_cv_mcontext_underscores,
1347       AC_COMPILE_IFELSE([
1348 #include <sys/cdefs.h>
1349 #include <sys/signal.h>
1350 #include <ucontext.h>
1351 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1352 ],
1353         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1354       if test $gcc_cv_mcontext_underscores = yes; then
1355         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1356           [mcontext_t fields start with __])
1357       fi
1358     ;;
1359 esac
1360
1361 # ---------
1362 # Threading
1363 # ---------
1364
1365 # Check if a valid thread package
1366 case ${enable_threads} in
1367   "" | no)
1368     # No threads
1369     target_thread_file='single'
1370     ;;
1371   yes)
1372     # default
1373     target_thread_file='single'
1374     ;;
1375   aix | dce | gnat | irix | posix | posix95 | rtems | \
1376   single | solaris | vxworks | win32 | mipssde)
1377     target_thread_file=${enable_threads}
1378     ;;
1379   *)
1380     echo "${enable_threads} is an unknown thread package" 1>&2
1381     exit 1
1382     ;;
1383 esac
1384
1385 if test x${thread_file} = x; then
1386   # No thread file set by target-specific clauses in config.gcc,
1387   # so use file chosen by default logic above
1388   thread_file=${target_thread_file}
1389 fi
1390
1391 # Make gthr-default.h if we have a thread file.
1392 gthread_flags=
1393 if test $thread_file != single; then
1394   echo "#include \"gthr-${thread_file}.h\"" > gthr-default.h-t
1395   if diff gthr-default.h-t gthr-default.h 2>/dev/null; then
1396     rm -f gthr-default.h-t
1397   else
1398     mv -f gthr-default.h-t gthr-default.h
1399   fi
1400   gthread_flags=-DHAVE_GTHR_DEFAULT
1401 fi
1402 AC_SUBST(gthread_flags)
1403
1404 # --------
1405 # UNSORTED
1406 # --------
1407
1408 use_cxa_atexit=no
1409 if test x$enable___cxa_atexit = xyes || \
1410    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1411   if test x$host = x$target; then
1412     case $host in
1413       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1414       # keyed to flag_use_cxa_atexit
1415       *-*-mingw32*)
1416         use_cxa_atexit=yes
1417         ;;
1418       *)
1419         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1420           [echo "__cxa_atexit can't be enabled on this target"])
1421         ;;
1422     esac
1423   else
1424     # We can't check for __cxa_atexit when building a cross, so assume
1425     # it is available
1426     use_cxa_atexit=yes
1427   fi
1428   if test x$use_cxa_atexit = xyes; then
1429     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1430       [Define if you want to use __cxa_atexit, rather than atexit, to
1431       register C++ destructors for local statics and global objects.
1432       This is essential for fully standards-compliant handling of
1433       destructors, but requires __cxa_atexit in libc.])
1434   fi
1435 fi
1436
1437 # Look for a file containing extra machine modes.
1438 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1439   extra_modes_file='$(srcdir)'/config/${extra_modes}
1440   AC_SUBST(extra_modes_file)
1441   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1442   [Define to the name of a file containing a list of extra machine modes
1443    for this architecture.])
1444 fi
1445
1446 # Convert extra_options into a form suitable for Makefile use.
1447 extra_opt_files=
1448 for f in $extra_options; do
1449   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1450 done
1451 AC_SUBST(extra_opt_files)
1452
1453 # auto-host.h is the file containing items generated by autoconf and is
1454 # the first file included by config.h.
1455 # If host=build, it is correct to have bconfig include auto-host.h
1456 # as well.  If host!=build, we are in error and need to do more
1457 # work to find out the build config parameters.
1458 if test x$host = x$build
1459 then
1460         build_auto=auto-host.h
1461 else
1462         # We create a subdir, then run autoconf in the subdir.
1463         # To prevent recursion we set host and build for the new
1464         # invocation of configure to the build for this invocation
1465         # of configure.
1466         tempdir=build.$$
1467         rm -rf $tempdir
1468         mkdir $tempdir
1469         cd $tempdir
1470         case ${srcdir} in
1471         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1472         *) realsrcdir=../${srcdir};;
1473         esac
1474         saved_CFLAGS="${CFLAGS}"
1475         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1476         LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1477         ${realsrcdir}/configure \
1478                 --enable-languages=${enable_languages-all} \
1479                 --target=$target_alias --host=$build_alias --build=$build_alias
1480         CFLAGS="${saved_CFLAGS}"
1481
1482         # We just finished tests for the build machine, so rename
1483         # the file auto-build.h in the gcc directory.
1484         mv auto-host.h ../auto-build.h
1485         cd ..
1486         rm -rf $tempdir
1487         build_auto=auto-build.h
1488 fi
1489 AC_SUBST(build_subdir)
1490
1491 tm_file="${tm_file} defaults.h"
1492 tm_p_file="${tm_p_file} tm-preds.h"
1493 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1494 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1495 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1496 # put this back in temporarily.
1497 xm_file="auto-host.h ansidecl.h ${xm_file}"
1498
1499 # --------
1500 # UNSORTED
1501 # --------
1502
1503 changequote(,)dnl
1504 # Compile in configure arguments.
1505 if test -f configargs.h ; then
1506         # Being re-configured.
1507         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1508         gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1509 else
1510         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1511 fi
1512
1513 # Double all backslashes and backslash all quotes to turn
1514 # gcc_config_arguments into a C string.
1515 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1516 $gcc_config_arguments
1517 EOF
1518 gcc_config_arguments_str=`cat conftest.out`
1519 rm -f conftest.out
1520
1521 cat > configargs.h <<EOF
1522 /* Generated automatically. */
1523 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1524 static const char thread_model[] = "$thread_file";
1525
1526 static const struct {
1527   const char *name, *value;
1528 } configure_default_options[] = $configure_default_options;
1529 EOF
1530 changequote([,])dnl
1531
1532 changequote(,)dnl
1533 gcc_BASEVER=`cat $srcdir/BASE-VER`
1534 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1535 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1536 if test -f $srcdir/REVISION ; then
1537         gcc_REVISION=`cat $srcdir/REVISION`
1538 else
1539         gcc_REVISION=""
1540 fi
1541 cat > plugin-version.h <<EOF
1542 #include "configargs.h"
1543
1544 static char basever[] = "$gcc_BASEVER";
1545 static char datestamp[] = "$gcc_DATESTAMP";
1546 static char devphase[] = "$gcc_DEVPHASE";
1547 static char revision[] = "$gcc_REVISION";
1548
1549 /* FIXME plugins: We should make the version information more precise.
1550    One way to do is to add a checksum. */
1551
1552 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1553                                                 devphase, revision,
1554                                                 configuration_arguments};
1555 EOF
1556 changequote([,])dnl
1557
1558 # Internationalization
1559 ZW_GNU_GETTEXT_SISTER_DIR
1560
1561 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1562 # -liconv on the link line twice.
1563 case "$LIBINTL" in *$LIBICONV*)
1564         LIBICONV= ;;
1565 esac
1566
1567 AC_ARG_ENABLE(secureplt,
1568 [  --enable-secureplt      enable -msecure-plt by default for PowerPC],
1569 [], [])
1570
1571 AC_ARG_ENABLE(leading-mingw64-underscores,
1572   AS_HELP_STRING([--enable-leading-mingw64-underscores],
1573                  [Enable leading underscores on 64 bit mingw targets]),
1574   [],[])
1575 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1576   [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1577     [Define if we should use leading underscore on 64 bit mingw targets])])
1578
1579 AC_ARG_ENABLE(cld,
1580 [  --enable-cld            enable -mcld by default for 32bit x86], [],
1581 [enable_cld=no])
1582
1583 # Windows32 Registry support for specifying GCC installation paths.
1584 AC_ARG_ENABLE(win32-registry,
1585 [  --disable-win32-registry
1586                           disable lookup of installation paths in the
1587                           Registry on Windows hosts
1588   --enable-win32-registry enable registry lookup (default)
1589   --enable-win32-registry=KEY
1590                           use KEY instead of GCC version as the last portion
1591                           of the registry key],,)
1592
1593 case $host_os in
1594   win32 | pe | cygwin* | mingw32* | uwin*)
1595     if test "x$enable_win32_registry" != xno; then
1596       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1597     fi
1598
1599     if test "x$enable_win32_registry" != xno; then
1600       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1601   [Define to 1 if installation paths should be looked up in the Windows
1602    Registry. Ignored on non-Windows hosts.])
1603
1604       if test "x$enable_win32_registry" != xyes \
1605          && test "x$enable_win32_registry" != x; then
1606         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1607   [Define to be the last component of the Windows registry key under which
1608    to look for installation paths.  The full key used will be
1609    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1610    The default is the GCC version number.])
1611       fi
1612     fi
1613   ;;
1614 esac
1615
1616 # Get an absolute path to the GCC top-level source directory
1617 holddir=`${PWDCMD-pwd}`
1618 cd $srcdir
1619 topdir=`${PWDCMD-pwd}`
1620 cd $holddir
1621
1622 # Conditionalize the makefile for this host machine.
1623 xmake_file=
1624 for f in ${host_xmake_file}
1625 do
1626         if test -f ${srcdir}/config/$f
1627         then
1628                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1629         fi
1630 done
1631
1632 # Conditionalize the makefile for this target machine.
1633 tmake_file_=
1634 for f in ${tmake_file}
1635 do
1636         if test -f ${srcdir}/config/$f
1637         then
1638                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1639         fi
1640 done
1641 tmake_file="${tmake_file_}"
1642
1643 out_object_file=`basename $out_file .c`.o
1644
1645 tm_file_list="options.h"
1646 tm_include_list="options.h insn-constants.h"
1647 for f in $tm_file; do
1648   case $f in
1649     ./* )
1650        f=`echo $f | sed 's/^..//'`
1651        tm_file_list="${tm_file_list} $f"
1652        tm_include_list="${tm_include_list} $f"
1653        ;;
1654     defaults.h )
1655        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1656        tm_include_list="${tm_include_list} $f"
1657        ;;
1658     * )
1659        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1660        tm_include_list="${tm_include_list} config/$f"
1661        ;;
1662   esac
1663 done
1664
1665 tm_p_file_list=
1666 tm_p_include_list=
1667 for f in $tm_p_file; do
1668   case $f in
1669     tm-preds.h )
1670        tm_p_file_list="${tm_p_file_list} $f"
1671        tm_p_include_list="${tm_p_include_list} $f"
1672        ;;
1673     * )
1674        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1675        tm_p_include_list="${tm_p_include_list} config/$f"
1676   esac
1677 done
1678
1679 xm_file_list=
1680 xm_include_list=
1681 for f in $xm_file; do
1682   case $f in
1683     ansidecl.h )
1684        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1685        xm_include_list="${xm_include_list} $f"
1686        ;;
1687     auto-host.h )
1688        xm_file_list="${xm_file_list} $f"
1689        xm_include_list="${xm_include_list} $f"
1690        ;;
1691     * )
1692        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1693        xm_include_list="${xm_include_list} config/$f"
1694        ;;
1695   esac
1696 done
1697
1698 host_xm_file_list=
1699 host_xm_include_list=
1700 for f in $host_xm_file; do
1701   case $f in
1702     ansidecl.h )
1703        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1704        host_xm_include_list="${host_xm_include_list} $f"
1705        ;;
1706     auto-host.h )
1707        host_xm_file_list="${host_xm_file_list} $f"
1708        host_xm_include_list="${host_xm_include_list} $f"
1709        ;;
1710     * )
1711        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1712        host_xm_include_list="${host_xm_include_list} config/$f"
1713        ;;
1714   esac
1715 done
1716
1717 build_xm_file_list=
1718 for f in $build_xm_file; do
1719   case $f in
1720     ansidecl.h )
1721        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1722        build_xm_include_list="${build_xm_include_list} $f"
1723        ;;
1724     auto-build.h | auto-host.h )
1725        build_xm_file_list="${build_xm_file_list} $f"
1726        build_xm_include_list="${build_xm_include_list} $f"
1727        ;;
1728     * )
1729        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
1730        build_xm_include_list="${build_xm_include_list} config/$f"
1731        ;;
1732   esac
1733 done
1734
1735 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
1736 # cross-compiler which does not use the native headers and libraries.
1737 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
1738 CROSS=                                          AC_SUBST(CROSS)
1739 ALL=all.internal                                AC_SUBST(ALL)
1740 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
1741
1742 if test "x$with_build_sysroot" != x; then
1743   build_system_header_dir=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
1744 else
1745   # This value is used, even on a native system, because
1746   # CROSS_SYSTEM_HEADER_DIR is just
1747   # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
1748   build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
1749 fi
1750
1751 if test x$host != x$target
1752 then
1753         CROSS="-DCROSS_DIRECTORY_STRUCTURE"
1754         ALL=all.cross
1755         SYSTEM_HEADER_DIR=$build_system_header_dir
1756         case "$host","$target" in
1757         # Darwin crosses can use the host system's libraries and headers,
1758         # because of the fat library support.  Of course, it must be the
1759         # same version of Darwin on both sides.  Allow the user to
1760         # just say --target=foo-darwin without a version number to mean
1761         # "the version on this system".
1762             *-*-darwin*,*-*-darwin*)
1763                 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
1764                 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
1765                 if test $hostos = $targetos -o $targetos = darwin ; then
1766                     CROSS=
1767                     SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
1768                     with_headers=yes
1769                 fi
1770                 ;;
1771
1772             i?86-*-*,x86_64-*-* \
1773             | powerpc*-*-*,powerpc64*-*-*)
1774                 CROSS="$CROSS -DNATIVE_CROSS" ;;
1775         esac
1776 elif test "x$TARGET_SYSTEM_ROOT" != x; then
1777         SYSTEM_HEADER_DIR=$build_system_header_dir
1778 fi
1779
1780 # If this is a cross-compiler that does not
1781 # have its own set of headers then define
1782 # inhibit_libc
1783
1784 # If this is using newlib, without having the headers available now,
1785 # then define inhibit_libc in LIBGCC2_CFLAGS.
1786 # This prevents libgcc2 from containing any code which requires libc
1787 # support.
1788 : ${inhibit_libc=false}
1789 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
1790        test x$with_newlib = xyes ; } &&
1791      { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
1792        inhibit_libc=true
1793 fi
1794 AC_SUBST(inhibit_libc)
1795
1796 # When building gcc with a cross-compiler, we need to adjust things so
1797 # that the generator programs are still built with the native compiler.
1798 # Also, we cannot run fixincludes.
1799
1800 # These are the normal (build=host) settings:
1801 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
1802 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
1803 BUILD_LDFLAGS='$(LDFLAGS)'      AC_SUBST(BUILD_LDFLAGS)
1804 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
1805
1806 # And these apply if build != host, or we are generating coverage data
1807 if test x$build != x$host || test "x$coverage_flags" != x
1808 then
1809     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
1810     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
1811 fi
1812
1813 # Expand extra_headers to include complete path.
1814 # This substitutes for lots of t-* files.
1815 extra_headers_list=
1816 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
1817 for file in ${extra_headers} ; do
1818   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
1819 done
1820
1821 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
1822 if test x"$use_gcc_tgmath" = xyes
1823 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
1824 fi
1825
1826 # Define collect2 in Makefile.
1827 case $host_can_use_collect2 in
1828   no) collect2= ;;
1829   *) collect2='collect2$(exeext)' ;;
1830 esac
1831 AC_SUBST([collect2])
1832
1833 # Add a definition of USE_COLLECT2 if system wants one.
1834 case $use_collect2 in
1835   no) use_collect2= ;;
1836   "") ;;
1837   *)
1838     host_xm_defines="${host_xm_defines} USE_COLLECT2"
1839     xm_defines="${xm_defines} USE_COLLECT2"
1840     case $host_can_use_collect2 in
1841       no)
1842         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
1843         ;;
1844     esac
1845     ;;
1846 esac
1847
1848 # ---------------------------
1849 # Assembler & linker features
1850 # ---------------------------
1851
1852 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
1853 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
1854 # However when ld-new is first executed from the build tree, libtool will
1855 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
1856 # to the build tree.  While doing this we need to use the previous-stage
1857 # linker, or we have an infinite loop.  The presence of a shell script as
1858 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
1859 # the gcc/collect-ld script.  So we need to know how libtool works, or
1860 # exec-tool will fail.
1861
1862 m4_defun([_LT_CONFIG_COMMANDS], [])
1863 AC_PROG_LIBTOOL
1864 AC_SUBST(objdir)
1865 AC_SUBST(enable_fast_install)
1866
1867 # Identify the assembler which will work hand-in-glove with the newly
1868 # built GCC, so that we can examine its features.  This is the assembler
1869 # which will be driven by the driver program.
1870 #
1871 # If build != host, and we aren't building gas in-tree, we identify a
1872 # build->target assembler and hope that it will have the same features
1873 # as the host->target assembler we'll be using.
1874 gcc_cv_gas_major_version=
1875 gcc_cv_gas_minor_version=
1876 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
1877
1878 m4_pattern_allow([AS_FOR_TARGET])dnl
1879 AS_VAR_SET_IF(gcc_cv_as,, [
1880 if test -x "$DEFAULT_ASSEMBLER"; then
1881         gcc_cv_as="$DEFAULT_ASSEMBLER"
1882 elif test -f $gcc_cv_as_gas_srcdir/configure.in \
1883      && test -f ../gas/Makefile \
1884      && test x$build = x$host; then
1885         gcc_cv_as=../gas/as-new$build_exeext
1886 elif test -x as$build_exeext; then
1887         # Build using assembler in the current directory.
1888         gcc_cv_as=./as$build_exeext
1889 elif test -x $AS_FOR_TARGET; then
1890         gcc_cv_as="$AS_FOR_TARGET"
1891 else
1892         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
1893 fi])
1894
1895 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
1896 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
1897 case "$ORIGINAL_AS_FOR_TARGET" in
1898   ./as | ./as$build_exeext) ;;
1899   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
1900 esac
1901
1902 AC_MSG_CHECKING(what assembler to use)
1903 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
1904   # Single tree build which includes gas.  We want to prefer it
1905   # over whatever linker top-level may have detected, since
1906   # we'll use what we're building after installation anyway.
1907   AC_MSG_RESULT(newly built gas)
1908   in_tree_gas=yes
1909   _gcc_COMPUTE_GAS_VERSION
1910   in_tree_gas_is_elf=no
1911   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
1912      || (grep 'obj_format = multi' ../gas/Makefile \
1913          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
1914   then
1915     in_tree_gas_is_elf=yes
1916   fi
1917 else
1918   AC_MSG_RESULT($gcc_cv_as)
1919   in_tree_gas=no
1920 fi
1921
1922 # Identify the linker which will work hand-in-glove with the newly
1923 # built GCC, so that we can examine its features.  This is the linker
1924 # which will be driven by the driver program.
1925 #
1926 # If build != host, and we aren't building gas in-tree, we identify a
1927 # build->target linker and hope that it will have the same features
1928 # as the host->target linker we'll be using.
1929 gcc_cv_gld_major_version=
1930 gcc_cv_gld_minor_version=
1931 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
1932 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
1933
1934 AS_VAR_SET_IF(gcc_cv_ld,, [
1935 if test -x "$DEFAULT_LINKER"; then
1936         gcc_cv_ld="$DEFAULT_LINKER"
1937 elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
1938      && test -f ../ld/Makefile \
1939      && test x$build = x$host; then
1940         gcc_cv_ld=../ld/ld-new$build_exeext
1941 elif test -x collect-ld$build_exeext; then
1942         # Build using linker in the current directory.
1943         gcc_cv_ld=./collect-ld$build_exeext
1944 elif test -x $LD_FOR_TARGET; then
1945         gcc_cv_ld="$LD_FOR_TARGET"
1946 else
1947         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
1948 fi])
1949
1950 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
1951 PLUGIN_LD=`basename $gcc_cv_ld`
1952 AC_ARG_WITH(plugin-ld,
1953 [  --with-plugin-ld=[[ARG]]  specify the plugin linker],
1954 [if test x"$withval" != x; then
1955    ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
1956    PLUGIN_LD="$withval"
1957  fi])
1958 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
1959 AC_DEFINE_UNQUOTED(PLUGIN_LD, "$PLUGIN_LD", [Specify plugin linker])
1960
1961 # Check to see if we are using gold instead of ld
1962 AC_MSG_CHECKING(whether we are using gold)
1963 ld_is_gold=no
1964 if test x$gcc_cv_ld != x; then
1965   if $gcc_cv_ld --version 2>/dev/null | sed 1q \
1966      | grep "GNU gold" > /dev/null; then
1967     ld_is_gold=yes
1968   fi
1969 fi
1970 AC_MSG_RESULT($ld_is_gold)
1971
1972 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
1973 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
1974 case "$ORIGINAL_LD_FOR_TARGET" in
1975   ./collect-ld | ./collect-ld$build_exeext) ;;
1976   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
1977 esac
1978
1979 AC_MSG_CHECKING(what linker to use)
1980 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext; then
1981         # Single tree build which includes ld.  We want to prefer it
1982         # over whatever linker top-level may have detected, since
1983         # we'll use what we're building after installation anyway.
1984         AC_MSG_RESULT(newly built ld)
1985         in_tree_ld=yes
1986         in_tree_ld_is_elf=no
1987         if (grep 'EMUL = .*elf' ../ld/Makefile \
1988             || grep 'EMUL = .*linux' ../ld/Makefile \
1989             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
1990           in_tree_ld_is_elf=yes
1991         fi
1992         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
1993         do
1994 changequote(,)dnl
1995                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*\(VERSION=[0-9]*\.[0-9]*.*\)/\1/p' < $f`
1996                 if test x$gcc_cv_gld_version != x; then
1997                         break
1998                 fi
1999         done
2000         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
2001         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
2002 changequote([,])dnl
2003 else
2004         AC_MSG_RESULT($gcc_cv_ld)
2005         in_tree_ld=no
2006 fi
2007
2008 # Figure out what nm we will be using.
2009 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2010 AS_VAR_SET_IF(gcc_cv_nm,, [
2011 if test -f $gcc_cv_binutils_srcdir/configure.in \
2012      && test -f ../binutils/Makefile \
2013      && test x$build = x$host; then
2014         gcc_cv_nm=../binutils/nm-new$build_exeext
2015 elif test -x nm$build_exeext; then
2016         gcc_cv_nm=./nm$build_exeext
2017 elif test -x $NM_FOR_TARGET; then
2018         gcc_cv_nm="$NM_FOR_TARGET"
2019 else
2020         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2021 fi])
2022
2023 AC_MSG_CHECKING(what nm to use)
2024 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2025         # Single tree build which includes binutils.
2026         AC_MSG_RESULT(newly built nm)
2027         in_tree_nm=yes
2028 else
2029         AC_MSG_RESULT($gcc_cv_nm)
2030         in_tree_nm=no
2031 fi
2032
2033 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2034 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2035 case "$ORIGINAL_NM_FOR_TARGET" in
2036   ./nm | ./nm$build_exeext) ;;
2037   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2038 esac
2039
2040
2041 # Figure out what objdump we will be using.
2042 AS_VAR_SET_IF(gcc_cv_objdump,, [
2043 if test -f $gcc_cv_binutils_srcdir/configure.in \
2044      && test -f ../binutils/Makefile \
2045      && test x$build = x$host; then
2046         # Single tree build which includes binutils.
2047         gcc_cv_objdump=../binutils/objdump$build_exeext
2048 elif test -x objdump$build_exeext; then
2049         gcc_cv_objdump=./objdump$build_exeext
2050 elif test -x $OBJDUMP_FOR_TARGET; then
2051         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2052 else
2053         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2054 fi])
2055
2056 AC_MSG_CHECKING(what objdump to use)
2057 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2058         # Single tree build which includes binutils.
2059         AC_MSG_RESULT(newly built objdump)
2060 elif test x$gcc_cv_objdump = x; then
2061         AC_MSG_RESULT(not found)
2062 else
2063         AC_MSG_RESULT($gcc_cv_objdump)
2064 fi
2065
2066 # Figure out what readelf we will be using.
2067 AS_VAR_SET_IF(gcc_cv_readelf,, [
2068 if test -f $gcc_cv_binutils_srcdir/configure.in \
2069      && test -f ../binutils/Makefile \
2070      && test x$build = x$host; then
2071         # Single tree build which includes binutils.
2072         gcc_cv_readelf=../binutils/readelf$build_exeext
2073 elif test -x readelf$build_exeext; then
2074         gcc_cv_readelf=./readelf$build_exeext
2075 else
2076         AC_PATH_PROG(gcc_cv_readelf, readelf)
2077 fi])
2078
2079 AC_MSG_CHECKING(what readelf to use)
2080 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2081         # Single tree build which includes binutils.
2082         AC_MSG_RESULT(newly built readelf)
2083 elif test x$gcc_cv_readelf = x; then
2084         AC_MSG_RESULT(not found)
2085 else
2086         AC_MSG_RESULT($gcc_cv_readelf)
2087 fi
2088
2089 # Figure out what assembler alignment features are present.
2090 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2091  [2,6,0],,
2092 [.balign 4
2093 .p2align 2],,
2094 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2095   [Define if your assembler supports .balign and .p2align.])])
2096
2097 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2098  [2,8,0],,
2099  [.p2align 4,,7],,
2100 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2101   [Define if your assembler supports specifying the maximum number
2102    of bytes to skip when using the GAS .p2align command.])])
2103
2104 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2105  [2,8,0],,
2106  [.literal16],,
2107 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2108   [Define if your assembler supports .literal16.])])
2109
2110 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2111  [elf,2,9,0],,
2112  [conftest_label1: .word 0
2113 .subsection -1
2114 conftest_label2: .word 0
2115 .previous],
2116  [if test x$gcc_cv_nm != x; then
2117     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2118     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2119     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2120     then :
2121     else gcc_cv_as_subsection_m1=yes
2122     fi
2123     rm -f conftest.nm1 conftest.nm2
2124   fi],
2125  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2126   [Define if your assembler supports .subsection and .subsection -1 starts
2127    emitting at the beginning of your section.])])
2128
2129 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2130  [2,2,0],,
2131  [      .weak foobar],,
2132 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2133
2134 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2135  [2,17,0],,
2136  [      .weakref foobar, barfnot],,
2137 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2138
2139 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2140  [2,15,91],,
2141  [      .SPACE $TEXT$
2142         .NSUBSPA $CODE$,COMDAT],,
2143 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2144
2145 # .hidden needs to be supported in both the assembler and the linker,
2146 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2147 # This is irritatingly difficult to feature test for; we have to check the
2148 # date string after the version number.  If we've got an in-tree
2149 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2150 # to be safe.
2151 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2152 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2153  [elf,2,13,0],,
2154 [       .hidden foobar
2155 foobar:],[
2156 # Solaris 9/x86 as incorrectly emits an alias for a hidden symbol with
2157 # STV_HIDDEN, so disable .hidden support if so.
2158 case "${target}" in
2159   i?86-*-solaris2*)
2160     if test x$gcc_cv_as != x && test x$gcc_cv_objdump != x; then
2161       cat > conftest.s <<EOF
2162 .globl hidden
2163         .hidden hidden
2164 hidden:
2165 .globl default
2166         .set    default,hidden
2167 EOF
2168       if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
2169         && $gcc_cv_objdump -t conftest.o 2>/dev/null | \
2170         grep '\.hidden default' > /dev/null; then
2171         gcc_cv_as_hidden=no
2172       else
2173         gcc_cv_as_hidden=yes
2174       fi
2175     else
2176       # Assume bug is present if objdump is missing.
2177       gcc_cv_as_hidden=no
2178     fi
2179     ;;
2180   *)
2181     gcc_cv_as_hidden=yes
2182     ;;
2183 esac])
2184
2185 changequote(,)dnl
2186 if test $in_tree_ld != yes ; then
2187   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2188   if test x"$ld_is_gold" = xyes; then
2189     gcc_cv_ld_hidden=yes
2190   elif echo "$ld_ver" | grep GNU > /dev/null; then
2191     ld_vers=`echo $ld_ver | sed -n \
2192         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2193     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2194     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2195     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2196     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2197   else
2198     case "${target}" in
2199       *-*-solaris2*)
2200         #
2201         # Solaris 2 ld -V output looks like this for a regular version:
2202         #
2203         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1699
2204         #
2205         # but test versions add stuff at the end:
2206         #
2207         # ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.1701:onnv-ab196087-6931056-03/25/10
2208         #
2209         ld_ver=`$gcc_cv_ld -V 2>&1`
2210         if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2211           ld_vers=`echo $ld_ver | sed -n \
2212             -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2213           ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2214           ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2215         fi
2216         ;;
2217     esac
2218   fi
2219 fi
2220 changequote([,])dnl
2221
2222 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2223 [[if test $in_tree_ld = yes ; then
2224   gcc_cv_ld_hidden=no
2225   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2226      && test $in_tree_ld_is_elf = yes; then
2227      gcc_cv_ld_hidden=yes
2228   fi
2229 else
2230   gcc_cv_ld_hidden=yes
2231   if echo "$ld_ver" | grep GNU > /dev/null; then
2232     if test 0"$ld_date" -lt 20020404; then
2233       if test -n "$ld_date"; then
2234         # If there was date string, but was earlier than 2002-04-04, fail
2235         gcc_cv_ld_hidden=no
2236       elif test -z "$ld_vers"; then
2237         # If there was no date string nor ld version number, something is wrong
2238         gcc_cv_ld_hidden=no
2239       else
2240         test -z "$ld_vers_patch" && ld_vers_patch=0
2241         if test "$ld_vers_major" -lt 2; then
2242           gcc_cv_ld_hidden=no
2243         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2244           gcc_cv_ld_hidden="no"
2245         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2246           gcc_cv_ld_hidden=no
2247         fi
2248       fi
2249     fi
2250   else
2251     case "${target}" in
2252       hppa64*-*-hpux* | ia64*-*-hpux*)
2253         gcc_cv_ld_hidden=yes
2254         ;;
2255       *-*-solaris2.9* | *-*-solaris2.1[0-9]*)
2256         # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2257         # .symbolic was only added in Solaris 9 12/02.
2258         gcc_cv_ld_hidden=yes
2259         ;;
2260       *)
2261         gcc_cv_ld_hidden=no
2262         ;;
2263     esac
2264   fi
2265 fi]])
2266 libgcc_visibility=no
2267 AC_SUBST(libgcc_visibility)
2268 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2269 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2270   libgcc_visibility=yes
2271   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2272   [Define if your assembler and linker support .hidden.])
2273 fi
2274
2275 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2276 gcc_cv_ld_ro_rw_mix=unknown
2277 if test $in_tree_ld = yes ; then
2278   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2279      && test $in_tree_ld_is_elf = yes; then
2280     gcc_cv_ld_ro_rw_mix=read-write
2281   fi
2282 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2283   echo '.section myfoosect, "a"' > conftest1.s
2284   echo '.section myfoosect, "aw"' > conftest2.s
2285   echo '.byte 1' >> conftest2.s
2286   echo '.section myfoosect, "a"' > conftest3.s
2287   echo '.byte 0' >> conftest3.s
2288   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2289      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2290      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2291      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2292         conftest2.o conftest3.o > /dev/null 2>&1; then
2293     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2294                          | sed -e '/myfoosect/!d' -e N`
2295     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2296       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2297         gcc_cv_ld_ro_rw_mix=read-only
2298       else
2299         gcc_cv_ld_ro_rw_mix=read-write
2300       fi
2301     fi
2302   fi
2303 changequote(,)dnl
2304   rm -f conftest.* conftest[123].*
2305 changequote([,])dnl
2306 fi
2307 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2308         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2309   [Define if your linker links a mix of read-only
2310    and read-write sections into a read-write section.])
2311 fi
2312 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2313
2314 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2315 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2316   [elf,2,11,0],,
2317 [       .data
2318         .uleb128 L2 - L1
2319 L1:
2320         .uleb128 1280
2321         .sleb128 -1010
2322 L2:],
2323 [[# GAS versions before 2.11 do not support uleb128,
2324   # despite appearing to.
2325   # ??? There exists an elf-specific test that will crash
2326   # the assembler.  Perhaps it's better to figure out whether
2327   # arbitrary sections are supported and try the test.
2328   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2329   if echo "$as_ver" | grep GNU > /dev/null; then
2330     as_vers=`echo $as_ver | sed -n \
2331         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2332     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2333     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2334     if test $as_major -eq 2 && test $as_minor -lt 11
2335     then :
2336     else gcc_cv_as_leb128=yes
2337     fi
2338   fi]],
2339   [AC_DEFINE(HAVE_AS_LEB128, 1,
2340     [Define if your assembler supports .sleb128 and .uleb128.])])
2341
2342 # Check if we have assembler support for unwind directives.
2343 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2344   ,,
2345 [       .text
2346         .cfi_startproc
2347         .cfi_offset 0, 0
2348         .cfi_same_value 1
2349         .cfi_def_cfa 1, 2
2350         .cfi_escape 1, 2, 3, 4, 5
2351         .cfi_endproc],
2352 [case "$target" in
2353   *-*-solaris*)
2354     # If the linker used on Solaris (like Sun ld) isn't capable of merging
2355     # read-only and read-write sections, we need to make sure that the
2356     # assembler used emits read-write .eh_frame sections.
2357     if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2358       if test "x$gcc_cv_objdump" != x; then
2359         if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2360                 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2361           gcc_cv_as_cfi_directive=no
2362         else
2363           case "$target" in
2364             i?86-*-solaris2.1[[0-9]]*)
2365               # On Solaris/x86, make sure that GCC and gas agree on using
2366               # read-only .eh_frame sections for 64-bit.
2367               if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \
2368                 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2369                         sed -e /.eh_frame/!d -e N | \
2370                         grep READONLY > /dev/null; then
2371                 gcc_cv_as_cfi_directive=yes
2372               else
2373                 gcc_cv_as_cfi_directive=no
2374               fi
2375               ;;
2376             *)
2377               gcc_cv_as_cfi_directive=yes
2378               ;;
2379           esac
2380         fi
2381       else
2382         # no objdump, err on the side of caution
2383         gcc_cv_as_cfi_directive=no
2384       fi
2385     else
2386       gcc_cv_as_cfi_directive=yes
2387     fi
2388     ;;
2389   *-*-*)
2390     gcc_cv_as_cfi_directive=yes
2391     ;;
2392 esac])
2393 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_readelf != x; then
2394 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2395   ,,
2396 [       .text
2397         .cfi_startproc
2398         .cfi_adjust_cfa_offset 64
2399         .skip 75040, 0
2400         .cfi_adjust_cfa_offset 128
2401         .cfi_endproc],
2402 [[
2403 if $gcc_cv_readelf -wf conftest.o 2>/dev/null \
2404     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
2405    gcc_cv_as_cfi_advance_working=yes
2406 fi
2407 ]])
2408 else
2409   # no readelf, err on the side of caution
2410   gcc_cv_as_cfi_advance_working=no
2411 fi
2412 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2413   [`if test $gcc_cv_as_cfi_directive = yes \
2414        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2415   [Define 0/1 if your assembler supports CFI directives.])
2416
2417 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2418   gcc_cv_as_cfi_personality_directive, ,,
2419 [       .text
2420         .cfi_startproc
2421         .cfi_personality 0, symbol
2422         .cfi_endproc])
2423 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2424   [`if test $gcc_cv_as_cfi_personality_directive = yes;
2425     then echo 1; else echo 0; fi`],
2426   [Define 0/1 if your assembler supports .cfi_personality.])
2427
2428 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2429   gcc_cv_as_cfi_sections_directive, ,,
2430 [       .text
2431         .cfi_sections .debug_frame, .eh_frame
2432         .cfi_startproc
2433         .cfi_endproc])
2434 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2435   [`if test $gcc_cv_as_cfi_sections_directive = yes;
2436     then echo 1; else echo 0; fi`],
2437   [Define 0/1 if your assembler supports .cfi_sections.])
2438
2439 # GAS versions up to and including 2.11.0 may mis-optimize
2440 # .eh_frame data.
2441 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2442   [elf,2,12,0],,
2443 [       .text
2444 .LFB1:
2445         .4byte  0
2446 .L1:
2447         .4byte  0
2448 .LFE1:
2449         .section        .eh_frame,"aw",@progbits
2450 __FRAME_BEGIN__:
2451         .4byte  .LECIE1-.LSCIE1
2452 .LSCIE1:
2453         .4byte  0x0
2454         .byte   0x1
2455         .ascii "z\0"
2456         .byte   0x1
2457         .byte   0x78
2458         .byte   0x1a
2459         .byte   0x0
2460         .byte   0x4
2461         .4byte  1
2462         .p2align 1
2463 .LECIE1:
2464 .LSFDE1:
2465         .4byte  .LEFDE1-.LASFDE1
2466 .LASFDE1:
2467         .4byte  .LASFDE1-__FRAME_BEGIN__
2468         .4byte  .LFB1
2469         .4byte  .LFE1-.LFB1
2470         .byte   0x4
2471         .4byte  .LFE1-.LFB1
2472         .byte   0x4
2473         .4byte  .L1-.LFB1
2474 .LEFDE1:],
2475 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2476 cat > conftest.lit <<EOF
2477  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2478  0010 01000000 12000000 18000000 00000000  ................
2479  0020 08000000 04080000 0044               .........D      @&t@
2480 EOF
2481 cat > conftest.big <<EOF
2482  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2483  0010 00000001 00000012 00000018 00000000  ................
2484  0020 00000008 04000000 0844               .........D      @&t@
2485 EOF
2486   # If the assembler didn't choke, and we can objdump,
2487   # and we got the correct data, then succeed.
2488   # The text in the here-document typically retains its unix-style line
2489   # endings, while the output of objdump will use host line endings.
2490   # Therefore, use diff -b for the comparisons.
2491   if test x$gcc_cv_objdump != x \
2492   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2493      | tail -3 > conftest.got \
2494   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2495     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2496   then
2497     gcc_cv_as_eh_frame=yes
2498   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2499     gcc_cv_as_eh_frame=buggy
2500   else
2501     # Uh oh, what do we do now?
2502     gcc_cv_as_eh_frame=no
2503   fi])
2504
2505 if test $gcc_cv_as_eh_frame = buggy; then
2506   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2507   [Define if your assembler mis-optimizes .eh_frame data.])
2508 fi
2509
2510 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2511  [elf,2,12,0], [--fatal-warnings],
2512  [.section .rodata.str, "aMS", @progbits, 1])
2513 if test $gcc_cv_as_shf_merge = no; then
2514   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2515     [elf,2,12,0], [--fatal-warnings],
2516     [.section .rodata.str, "aMS", %progbits, 1])
2517 fi
2518 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2519   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2520 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2521
2522 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group,
2523  [elf,2,16,0], [--fatal-warnings],
2524  [.section .text,"axG",@progbits,.foo,comdat])
2525 if test $gcc_cv_as_comdat_group = yes; then
2526   gcc_cv_as_comdat_group_percent=no
2527 else
2528  gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group_percent,
2529    [elf,2,16,0], [--fatal-warnings],
2530    [.section .text,"axG",%progbits,.foo,comdat])
2531 fi
2532 if test x"$ld_is_gold" = xyes; then
2533   comdat_group=yes
2534 elif test $in_tree_ld = yes ; then
2535   comdat_group=no
2536   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
2537      && test $in_tree_ld_is_elf = yes; then
2538      comdat_group=yes
2539   fi
2540 elif echo "$ld_ver" | grep GNU > /dev/null; then
2541   comdat_group=yes
2542   if test 0"$ld_date" -lt 20050308; then
2543     if test -n "$ld_date"; then
2544       # If there was date string, but was earlier than 2005-03-08, fail
2545       comdat_group=no
2546     elif test "$ld_vers_major" -lt 2; then
2547       comdat_group=no
2548     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2549       comdat_group=no
2550     fi
2551   fi
2552 else
2553 changequote(,)dnl
2554   case "${target}" in
2555     *-*-solaris2.1[1-9]*)
2556       # Sun ld has COMDAT group support since Solaris 9, but it doesn't
2557       # interoperate with GNU as until Solaris 11 build 130, i.e. ld
2558       # version 1.688.
2559       #
2560       # FIXME: Maybe need to refine later when COMDAT group support with
2561       # Sun as is implemented.
2562       if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 1688; then
2563         comdat_group=yes
2564       else
2565         comdat_group=no
2566       fi
2567       ;;
2568     *)
2569       # Assume linkers other than GNU ld don't support COMDAT group.
2570       comdat_group=no
2571       ;;
2572   esac
2573 changequote([,])dnl
2574 fi
2575 # Allow overriding the automatic COMDAT group tests above.
2576 AC_ARG_ENABLE(comdat,
2577   [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
2578   [comdat_group="$enable_comdat"])
2579 if test $comdat_group = no; then
2580   gcc_cv_as_comdat_group=no
2581   gcc_cv_as_comdat_group_percent=no
2582 fi
2583 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2584   [`if test $gcc_cv_as_comdat_group = yes || test $gcc_cv_as_comdat_group_percent = yes; then echo 1; else echo 0; fi`],
2585 [Define 0/1 if your assembler and linker support COMDAT groups.])
2586
2587 gcc_GAS_CHECK_FEATURE([line table discriminator support],
2588  gcc_cv_as_discriminator,
2589  [2,19,51],,
2590 [       .text
2591         .file 1 "conf.c"
2592         .loc 1 1 0 discriminator 1],,
2593 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
2594   [Define if your assembler supports the .loc discriminator sub-directive.])])
2595
2596 # Thread-local storage - the check is heavily parameterized.
2597 conftest_s=
2598 tls_first_major=
2599 tls_first_minor=
2600 tls_as_opt=
2601 case "$target" in
2602 changequote(,)dnl
2603   alpha*-*-*)
2604     conftest_s='
2605         .section ".tdata","awT",@progbits
2606 foo:    .long   25
2607         .text
2608         ldq     $27,__tls_get_addr($29)         !literal!1
2609         lda     $16,foo($29)                    !tlsgd!1
2610         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
2611         ldq     $27,__tls_get_addr($29)         !literal!2
2612         lda     $16,foo($29)                    !tlsldm!2
2613         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
2614         ldq     $1,foo($29)                     !gotdtprel
2615         ldah    $2,foo($29)                     !dtprelhi
2616         lda     $3,foo($2)                      !dtprello
2617         lda     $4,foo($29)                     !dtprel
2618         ldq     $1,foo($29)                     !gottprel
2619         ldah    $2,foo($29)                     !tprelhi
2620         lda     $3,foo($2)                      !tprello
2621         lda     $4,foo($29)                     !tprel'
2622         tls_first_major=2
2623         tls_first_minor=13
2624         tls_as_opt=--fatal-warnings
2625         ;;
2626   cris-*-*|crisv32-*-*)
2627     conftest_s='
2628         .section ".tdata","awT",@progbits
2629 x:      .long   25
2630         .text
2631         move.d x:IE,$r10
2632         nop'
2633         tls_first_major=2
2634         tls_first_minor=20
2635         tls_as_opt=--fatal-warnings
2636         ;;
2637   frv*-*-*)
2638     conftest_s='
2639         .section ".tdata","awT",@progbits
2640 x:      .long   25
2641         .text
2642         call    #gettlsoff(x)'
2643         tls_first_major=2
2644         tls_first_minor=14
2645         ;;
2646   hppa*-*-linux*)
2647     conftest_s='
2648 t1:     .reg    %r20
2649 t2:     .reg    %r21
2650 gp:     .reg    %r19
2651         .section ".tdata","awT",@progbits
2652 foo:    .long   25
2653         .text
2654         .align  4
2655         addil LT%foo-$tls_gdidx$,gp
2656         ldo RT%foo-$tls_gdidx$(%r1),%arg0
2657         b __tls_get_addr
2658         nop
2659         addil LT%foo-$tls_ldidx$,gp
2660         b __tls_get_addr
2661         ldo RT%foo-$tls_ldidx$(%r1),%arg0
2662         addil LR%foo-$tls_dtpoff$,%ret0
2663         ldo RR%foo-$tls_dtpoff$(%r1),%t1
2664         mfctl %cr27,%t1
2665         addil LT%foo-$tls_ieoff$,gp
2666         ldw RT%foo-$tls_ieoff$(%r1),%t2
2667         add %t1,%t2,%t3
2668         mfctl %cr27,%t1
2669         addil LR%foo-$tls_leoff$,%t1
2670         ldo RR%foo-$tls_leoff$(%r1),%t2'
2671         tls_first_major=2
2672         tls_first_minor=15
2673         tls_as_opt=--fatal-warnings
2674         ;;
2675   arm*-*-*)
2676     conftest_s='
2677         .section ".tdata","awT",%progbits
2678 foo:    .long   25
2679         .text
2680 .word foo(gottpoff)
2681 .word foo(tpoff)
2682 .word foo(tlsgd)
2683 .word foo(tlsldm)
2684 .word foo(tlsldo)'
2685         tls_first_major=2
2686         tls_first_minor=17
2687         ;;
2688   i[34567]86-*-*)
2689     case "$target" in
2690       i[34567]86-*-solaris2.*)
2691         on_solaris=yes
2692         tga_func=___tls_get_addr
2693         ;;
2694       *)
2695         on_solaris=no
2696         ;;
2697     esac
2698     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2699       conftest_s='
2700         .section .tdata,"awt",@progbits'
2701       tls_first_major=0
2702       tls_first_minor=0
2703 changequote([,])dnl
2704       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
2705 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
2706 changequote(,)dnl
2707     else
2708       conftest_s='
2709         .section ".tdata","awT",@progbits'
2710       tls_first_major=2
2711       tls_first_minor=14
2712       tls_as_opt="--fatal-warnings"
2713     fi
2714     conftest_s="$conftest_s
2715 foo:    .long   25
2716         .text
2717         movl    %gs:0, %eax
2718         leal    foo@tlsgd(,%ebx,1), %eax
2719         leal    foo@tlsldm(%ebx), %eax
2720         leal    foo@dtpoff(%eax), %edx
2721         movl    foo@gottpoff(%ebx), %eax
2722         subl    foo@gottpoff(%ebx), %eax
2723         addl    foo@gotntpoff(%ebx), %eax
2724         movl    foo@indntpoff, %eax
2725         movl    \$foo@tpoff, %eax
2726         subl    \$foo@tpoff, %eax
2727         leal    foo@ntpoff(%ecx), %eax"
2728     ;;
2729   x86_64-*-*)
2730     conftest_s='
2731         .section ".tdata","awT",@progbits
2732 foo:    .long   25
2733         .text
2734         movq    %fs:0, %rax
2735         leaq    foo@TLSGD(%rip), %rdi
2736         leaq    foo@TLSLD(%rip), %rdi
2737         leaq    foo@DTPOFF(%rax), %rdx
2738         movq    foo@GOTTPOFF(%rip), %rax
2739         movq    $foo@TPOFF, %rax'
2740         tls_first_major=2
2741         tls_first_minor=14
2742         tls_as_opt=--fatal-warnings
2743         ;;
2744   ia64-*-*)
2745     conftest_s='
2746         .section ".tdata","awT",@progbits
2747 foo:    data8   25
2748         .text
2749         addl    r16 = @ltoff(@dtpmod(foo#)), gp
2750         addl    r17 = @ltoff(@dtprel(foo#)), gp
2751         addl    r18 = @ltoff(@tprel(foo#)), gp
2752         addl    r19 = @dtprel(foo#), gp
2753         adds    r21 = @dtprel(foo#), r13
2754         movl    r23 = @dtprel(foo#)
2755         addl    r20 = @tprel(foo#), gp
2756         adds    r22 = @tprel(foo#), r13
2757         movl    r24 = @tprel(foo#)'
2758         tls_first_major=2
2759         tls_first_minor=13
2760         tls_as_opt=--fatal-warnings
2761         ;;
2762   mips*-*-*)
2763     conftest_s='
2764         .section .tdata,"awT",@progbits
2765 x:
2766         .word 2
2767         .text
2768         addiu $4, $28, %tlsgd(x)
2769         addiu $4, $28, %tlsldm(x)
2770         lui $4, %dtprel_hi(x)
2771         addiu $4, $4, %dtprel_lo(x)
2772         lw $4, %gottprel(x)($28)
2773         lui $4, %tprel_hi(x)
2774         addiu $4, $4, %tprel_lo(x)'
2775         tls_first_major=2
2776         tls_first_minor=16
2777         tls_as_opt='-32 --fatal-warnings'
2778         ;;
2779   m68k-*-*)
2780     conftest_s='
2781         .section .tdata,"awT",@progbits
2782 x:
2783         .word 2
2784         .text
2785 foo:
2786         move.l x@TLSGD(%a5),%a0
2787         move.l x@TLSLDM(%a5),%a0
2788         move.l x@TLSLDO(%a5),%a0
2789         move.l x@TLSIE(%a5),%a0
2790         move.l x@TLSLE(%a5),%a0'
2791         tls_first_major=2
2792         tls_first_minor=19
2793         tls_as_opt='--fatal-warnings'
2794         ;;
2795   powerpc-*-*)
2796     conftest_s='
2797         .section ".tdata","awT",@progbits
2798         .align 2
2799 ld0:    .space 4
2800 ld1:    .space 4
2801 x1:     .space 4
2802 x2:     .space 4
2803 x3:     .space 4
2804         .text
2805         addi 3,31,ld0@got@tlsgd
2806         bl __tls_get_addr
2807         addi 3,31,x1@got@tlsld
2808         bl __tls_get_addr
2809         addi 9,3,x1@dtprel
2810         addis 9,3,x2@dtprel@ha
2811         addi 9,9,x2@dtprel@l
2812         lwz 9,x3@got@tprel(31)
2813         add 9,9,x@tls
2814         addi 9,2,x1@tprel
2815         addis 9,2,x2@tprel@ha
2816         addi 9,9,x2@tprel@l'
2817         tls_first_major=2
2818         tls_first_minor=14
2819         tls_as_opt="-a32 --fatal-warnings"
2820         ;;
2821   powerpc64-*-*)
2822     conftest_s='
2823         .section ".tdata","awT",@progbits
2824         .align 3
2825 ld0:    .space 8
2826 ld1:    .space 8
2827 x1:     .space 8
2828 x2:     .space 8
2829 x3:     .space 8
2830         .text
2831         addi 3,2,ld0@got@tlsgd
2832         bl .__tls_get_addr
2833         nop
2834         addi 3,2,ld1@toc
2835         bl .__tls_get_addr
2836         nop
2837         addi 3,2,x1@got@tlsld
2838         bl .__tls_get_addr
2839         nop
2840         addi 9,3,x1@dtprel
2841         bl .__tls_get_addr
2842         nop
2843         addis 9,3,x2@dtprel@ha
2844         addi 9,9,x2@dtprel@l
2845         bl .__tls_get_addr
2846         nop
2847         ld 9,x3@got@dtprel(2)
2848         add 9,9,3
2849         bl .__tls_get_addr
2850         nop'
2851         tls_first_major=2
2852         tls_first_minor=14
2853         tls_as_opt="-a64 --fatal-warnings"
2854         ;;
2855   s390-*-*)
2856     conftest_s='
2857         .section ".tdata","awT",@progbits
2858 foo:    .long   25
2859         .text
2860         .long   foo@TLSGD
2861         .long   foo@TLSLDM
2862         .long   foo@DTPOFF
2863         .long   foo@NTPOFF
2864         .long   foo@GOTNTPOFF
2865         .long   foo@INDNTPOFF
2866         l       %r1,foo@GOTNTPOFF(%r12)
2867         l       %r1,0(%r1):tls_load:foo
2868         bas     %r14,0(%r1,%r13):tls_gdcall:foo
2869         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
2870         tls_first_major=2
2871         tls_first_minor=14
2872         tls_as_opt="-m31 --fatal-warnings"
2873         ;;
2874   s390x-*-*)
2875     conftest_s='
2876         .section ".tdata","awT",@progbits
2877 foo:    .long   25
2878         .text
2879         .quad   foo@TLSGD
2880         .quad   foo@TLSLDM
2881         .quad   foo@DTPOFF
2882         .quad   foo@NTPOFF
2883         .quad   foo@GOTNTPOFF
2884         lg      %r1,foo@GOTNTPOFF(%r12)
2885         larl    %r1,foo@INDNTPOFF
2886         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
2887         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
2888         tls_first_major=2
2889         tls_first_minor=14
2890         tls_as_opt="-m64 -Aesame --fatal-warnings"
2891         ;;
2892   sh-*-* | sh[34]-*-*)
2893     conftest_s='
2894         .section ".tdata","awT",@progbits
2895 foo:    .long   25
2896         .text
2897         .long   foo@TLSGD
2898         .long   foo@TLSLDM
2899         .long   foo@DTPOFF
2900         .long   foo@GOTTPOFF
2901         .long   foo@TPOFF'
2902         tls_first_major=2
2903         tls_first_minor=13
2904         tls_as_opt=--fatal-warnings
2905         ;;
2906   sparc*-*-*)
2907     case "$target" in
2908       sparc*-sun-solaris2.*)
2909         on_solaris=yes
2910         tga_func=__tls_get_addr
2911         ;;
2912       *)
2913         on_solaris=no
2914         ;;
2915     esac
2916     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2917       conftest_s='
2918         .section ".tdata",#alloc,#write,#tls'
2919         tls_first_major=0
2920         tls_first_minor=0
2921     else
2922       conftest_s='
2923         .section ".tdata","awT",@progbits'
2924         tls_first_major=2
2925         tls_first_minor=14
2926         tls_as_opt="-32 --fatal-warnings"
2927     fi
2928     conftest_s="$conftest_s
2929 foo:    .long   25
2930         .text
2931         sethi   %tgd_hi22(foo), %o0
2932         add     %o0, %tgd_lo10(foo), %o1
2933         add     %l7, %o1, %o0, %tgd_add(foo)
2934         call    __tls_get_addr, %tgd_call(foo)
2935         sethi   %tldm_hi22(foo), %l1
2936         add     %l1, %tldm_lo10(foo), %l2
2937         add     %l7, %l2, %o0, %tldm_add(foo)
2938         call    __tls_get_addr, %tldm_call(foo)
2939         sethi   %tldo_hix22(foo), %l3
2940         xor     %l3, %tldo_lox10(foo), %l4
2941         add     %o0, %l4, %l5, %tldo_add(foo)
2942         sethi   %tie_hi22(foo), %o3
2943         add     %o3, %tie_lo10(foo), %o3
2944         ld      [%l7 + %o3], %o2, %tie_ld(foo)
2945         add     %g7, %o2, %o4, %tie_add(foo)
2946         sethi   %tle_hix22(foo), %l1
2947         xor     %l1, %tle_lox10(foo), %o5
2948         ld      [%g7 + %o5], %o1"
2949         ;;
2950   xtensa*-*-*)
2951     conftest_s='
2952         .section ".tdata","awT",@progbits
2953 foo:    .long   25
2954         .text
2955         movi    a8, foo@TLSFUNC
2956         movi    a10, foo@TLSARG
2957         callx8.tls a8, foo@TLSCALL'
2958         tls_first_major=2
2959         tls_first_minor=19
2960         ;;
2961 changequote([,])dnl
2962 esac
2963 set_have_as_tls=no
2964 if test "x$enable_tls" = xno ; then
2965   : # TLS explicitly disabled.
2966 elif test "x$enable_tls" = xyes ; then
2967   set_have_as_tls=yes # TLS explicitly enabled.
2968 elif test -z "$tls_first_major"; then
2969   : # If we don't have a check, assume no support.
2970 else
2971   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
2972   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
2973   [set_have_as_tls=yes])
2974 fi
2975 case "$target" in
2976   # TLS was introduced in the Solaris 9 FCS release and backported to
2977   # Solaris 8 patches.  Support for GNU-style TLS on x86 was only
2978   # introduced in Solaris 9 4/04, replacing the earlier Sun style that Sun
2979   # ld and GCC don't support any longer.
2980   *-*-solaris2.*)
2981     AC_MSG_CHECKING(linker and ld.so.1 TLS support)
2982     ld_tls_support=no
2983     # Check ld and ld.so.1 TLS support.
2984     if echo "$ld_ver" | grep GNU > /dev/null; then
2985       # Assume all interesting versions of GNU ld have TLS support.
2986       # FIXME: still need ld.so.1 support, i.e. ld version checks below.
2987       ld_tls_support=yes
2988     else
2989       case "$target" in
2990         # Solaris 8/x86 ld has GNU style TLS support since version 1.280.
2991         i?86-*-solaris2.8)
2992           min_tls_ld_vers_minor=280
2993           ;;
2994         # Solaris 8/SPARC ld has TLS support since version 1.272.
2995         sparc*-*-solaris2.8)
2996           min_tls_ld_vers_minor=272
2997           ;;
2998         # Solaris 9/x86 ld has GNU style TLS support since version 1.374.
2999         i?86-*-solaris2.9)
3000           min_tls_ld_vers_minor=374
3001           ;;
3002         # Solaris 9/SPARC and Solaris 10+ ld have TLS support since FCS.
3003         sparc*-*-solaris2.9 | *-*-solaris2.1[[0-9]]*)
3004           min_tls_ld_vers_minor=343
3005           ;;
3006       esac
3007       if test "$ls_vers_major" -gt 1 || \
3008         test "$ld_vers_minor" -ge "$min_tls_ld_vers_minor"; then
3009         ld_tls_support=yes
3010       else
3011         set_have_as_tls=no
3012       fi
3013     fi
3014     AC_MSG_RESULT($ld_tls_support)
3015
3016     save_LIBS="$LIBS"
3017     save_LDFLAGS="$LDFLAGS"
3018     LIBS=
3019     LDFLAGS=
3020
3021     AC_MSG_CHECKING(alternate thread library)
3022     case "$target" in
3023       # TLS support was backported to Solaris 8 patches, but only lives in
3024       # the alternate thread library which became the default in Solaris 9.
3025       # We want to always use that, irrespective of TLS support.
3026       *-*-solaris2.8)
3027         # Take multilib subdir into account.  There's no spec to handle
3028         # this.  The 64 symlink exists since Solaris 8.
3029         lwp_dir=/usr/lib/lwp
3030         lwp_spec="-L$lwp_dir%{m64:/64} -R$lwp_dir%{m64:/64}"
3031         LDFLAGS="-L$lwp_dir -R$lwp_dir"
3032         ;;
3033       *-*-solaris2*)
3034         lwp_dir="none"
3035         lwp_spec=""
3036         ;;
3037     esac
3038     # Always define LIB_THREAD_LDFLAGS_SPEC, even without TLS support.
3039     AC_DEFINE_UNQUOTED(LIB_THREAD_LDFLAGS_SPEC, "$lwp_spec",
3040         [Define to the linker flags to use for -pthread.])
3041     AC_MSG_RESULT($lwp_dir)
3042
3043     AC_MSG_CHECKING(library containing $tga_func)
3044     # Before Solaris 10, __tls_get_addr (SPARC/x64) resp. ___tls_get_addr
3045     # (32-bit x86) only lived in libthread, so check for that.  Keep
3046     # set_have_as_tls if found, disable if not.
3047     AC_SEARCH_LIBS([$tga_func], [thread],, [set_have_as_tls=no])
3048     # Clear LIBS if we cannot support TLS.
3049     if test $set_have_as_tls = no; then
3050       LIBS=
3051     fi
3052     # Always define LIB_TLS_SPEC, even without TLS support.
3053     AC_DEFINE_UNQUOTED(LIB_TLS_SPEC, "$LIBS",
3054         [Define to the library containing __tls_get_addr/___tls_get_addr.])
3055     AC_MSG_RESULT($LIBS)
3056
3057     LIBS="$save_LIBS"
3058     LDFLAGS="$save_LDFLAGS"
3059     ;;
3060 esac
3061 if test $set_have_as_tls = yes ; then
3062   AC_DEFINE(HAVE_AS_TLS, 1,
3063             [Define if your assembler and linker support thread-local storage.])
3064 fi
3065
3066 # Target-specific assembler checks.
3067
3068 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3069 gcc_cv_ld_static_dynamic=no
3070 if test $in_tree_ld = yes ; then
3071   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3072     gcc_cv_ld_static_dynamic=yes
3073   fi
3074 elif test x$gcc_cv_ld != x; then
3075         # Check if linker supports -Bstatic/-Bdynamic option
3076         if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
3077           && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
3078                 gcc_cv_ld_static_dynamic=yes
3079         fi
3080 fi
3081 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3082         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3083 [Define if your linker supports -Bstatic/-Bdynamic option.])
3084 fi
3085 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3086
3087 if test x"$demangler_in_ld" = xyes; then
3088   AC_MSG_CHECKING(linker --demangle support)
3089   gcc_cv_ld_demangle=no
3090   if test $in_tree_ld = yes; then
3091     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3092       gcc_cv_ld_demangle=yes
3093     fi
3094   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3095     # Check if the GNU linker supports --demangle option
3096     if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
3097       gcc_cv_ld_demangle=yes
3098     fi
3099   fi
3100   if test x"$gcc_cv_ld_demangle" = xyes; then
3101     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3102 [Define if your linker supports --demangle option.])
3103   fi
3104   AC_MSG_RESULT($gcc_cv_ld_demangle)
3105 fi
3106
3107 case "$target" in
3108   # All TARGET_ABI_OSF targets.
3109   alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
3110     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3111         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3112 [       .set nomacro
3113         .text
3114         extbl   $3, $2, $3      !lituse_bytoff!1
3115         ldq     $2, a($29)      !literal!1
3116         ldq     $4, b($29)      !literal!2
3117         ldq_u   $3, 0($2)       !lituse_base!1
3118         ldq     $27, f($29)     !literal!5
3119         jsr     $26, ($27), f   !lituse_jsr!5
3120         ldah    $29, 0($26)     !gpdisp!3
3121         lda     $0, c($29)      !gprel
3122         ldah    $1, d($29)      !gprelhigh
3123         lda     $1, d($1)       !gprellow
3124         lda     $29, 0($29)     !gpdisp!3],,
3125     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3126   [Define if your assembler supports explicit relocations.])])
3127     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3128         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3129 [       .set nomacro
3130         .text
3131         ldq     $27, a($29)     !literal!1
3132         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
3133     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3134   [Define if your assembler supports the lituse_jsrdirect relocation.])])
3135     ;;
3136
3137   cris-*-*)
3138     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3139       gcc_cv_as_cris_no_mul_bug,[2,15,91],
3140       [-no-mul-bug-abort], [.text],,
3141       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3142                 [Define if your assembler supports the -no-mul-bug-abort option.])])
3143     ;;
3144
3145   sparc*-*-*)
3146     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3147       [.register %g2, #scratch],,
3148       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3149                 [Define if your assembler supports .register.])])
3150
3151     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3152       [-relax], [.text],,
3153       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3154                 [Define if your assembler supports -relax option.])])
3155
3156     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3157       gcc_cv_as_sparc_gotdata_op,,
3158       [-K PIC],
3159 [.text
3160 foo:
3161         nop
3162 bar:
3163         sethi %gdop_hix22(foo), %g1
3164         xor    %g1, %gdop_lox10(foo), %g1
3165         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
3166       [if test x$gcc_cv_ld != x \
3167        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3168          if $gcc_cv_ld -v | grep GNU >/dev/null 2>&1; then
3169            if test x$gcc_cv_objdump != x; then
3170              if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3171                 | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3172                gcc_cv_as_sparc_gotdata_op=no
3173              else
3174                gcc_cv_as_sparc_gotdata_op=yes
3175              fi
3176            fi
3177          else
3178            gcc_cv_as_sparc_gotdata_op=yes
3179          fi
3180        fi
3181        rm -f conftest],
3182       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3183                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3184
3185     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3186       gcc_cv_as_sparc_ua_pcrel,,
3187       [-K PIC],
3188 [.text
3189 foo:
3190         nop
3191 .data
3192 .align 4
3193 .byte 0
3194 .uaword %r_disp32(foo)],
3195       [if test x$gcc_cv_ld != x \
3196        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3197          gcc_cv_as_sparc_ua_pcrel=yes
3198        fi
3199        rm -f conftest],
3200       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3201                 [Define if your assembler and linker support unaligned PC relative relocs.])
3202
3203       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3204         gcc_cv_as_sparc_ua_pcrel_hidden,,
3205         [-K PIC],
3206 [.data
3207 .align 4
3208 .byte 0x31
3209 .uaword %r_disp32(foo)
3210 .byte 0x32, 0x33, 0x34
3211 .global foo
3212 .hidden foo
3213 foo:
3214 .skip 4],
3215         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3216          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3217          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3218             | grep ' 31000000 07323334' > /dev/null 2>&1; then
3219             if $gcc_cv_objdump -R conftest 2> /dev/null \
3220                | grep 'DISP32' > /dev/null 2>&1; then
3221                 :
3222             else
3223                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3224             fi
3225          fi
3226          rm -f conftest],
3227          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3228                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3229     ]) # unaligned pcrel relocs
3230
3231     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3232       gcc_cv_as_sparc_offsetable_lo10,,
3233       [-xarch=v9],
3234 [.text
3235         or %g1, %lo(ab) + 12, %g1
3236         or %g1, %lo(ab + 12), %g1],
3237       [if test x$gcc_cv_objdump != x \
3238        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3239           | grep ' 82106000 82106000' > /dev/null 2>&1; then
3240          gcc_cv_as_sparc_offsetable_lo10=yes
3241        fi],
3242        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3243                  [Define if your assembler supports offsetable %lo().])])
3244     ;;
3245
3246 changequote(,)dnl
3247   i[34567]86-*-* | x86_64-*-*)
3248 changequote([,])dnl
3249     case $target_os in
3250       cygwin*)
3251         # Full C++ conformance when using a shared libstdc++-v3 requires some
3252         # support from the Cygwin DLL, which in more recent versions exports
3253         # wrappers to aid in interposing and redirecting operators new, delete,
3254         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
3255         # are configuring for a version of Cygwin that exports the wrappers.
3256         if test x$host = x$target; then
3257           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3258         else
3259           # Can't check presence of libc functions during cross-compile, so
3260           # we just have to assume we're building for an up-to-date target.
3261           gcc_ac_cygwin_dll_wrappers=yes
3262         fi
3263         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
3264           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
3265           [Define if you want to generate code by default that assumes that the
3266            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
3267     esac
3268     case $target_os in
3269       cygwin* | pe | mingw32*)
3270         # Recent binutils allows the three-operand form of ".comm" on PE.  This
3271         # definition is used unconditionally to initialise the default state of
3272         # the target option variable that governs usage of the feature.
3273         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
3274          [2,19,52],,[.comm foo,1,32])
3275         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
3276           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
3277           [Define if your assembler supports specifying the alignment
3278            of objects allocated using the GAS .comm command.])
3279         # Used for DWARF 2 in PE
3280         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
3281           gcc_cv_as_ix86_pe_secrel32,
3282           [2,15,91],,
3283 [.text
3284 foo:    nop
3285 .data
3286         .secrel32 foo],
3287           [if test x$gcc_cv_ld != x \
3288            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
3289              gcc_cv_as_ix86_pe_secrel32=yes
3290            fi
3291            rm -f conftest],
3292           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
3293             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
3294         # Test if the assembler supports the extended form of the .section
3295         # directive that specifies section alignment.  LTO support uses this,
3296         # but normally only after installation, so we warn but don't fail the
3297         # configure if LTO is enabled but the assembler does not support it.
3298         gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
3299           [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
3300         if test x$gcc_cv_as_section_has_align != xyes; then
3301           case ",$enable_languages," in
3302             *,lto,*)
3303               AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
3304               ;;
3305           esac
3306         fi
3307         ;;
3308     esac
3309
3310     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
3311        gcc_cv_as_ix86_filds,,,
3312        [filds mem; fists mem],,
3313        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
3314          [Define if your assembler uses filds and fists mnemonics.])])
3315
3316     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
3317        gcc_cv_as_ix86_fildq,,,
3318        [fildq mem; fistpq mem],,
3319        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
3320          [Define if your assembler uses fildq and fistq mnemonics.])])
3321
3322     gcc_GAS_CHECK_FEATURE([cmov syntax],
3323       gcc_cv_as_ix86_cmov_sun_syntax,,,
3324       [cmovl.l %edx, %eax],,
3325       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
3326         [Define if your assembler supports the Sun syntax for cmov.])])
3327
3328     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
3329       gcc_cv_as_ix86_ffreep,,,
3330       [ffreep %st(1)],,
3331       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
3332         [Define if your assembler supports the ffreep mnemonic.])])
3333
3334     gcc_GAS_CHECK_FEATURE([.quad directive],
3335       gcc_cv_as_ix86_quad,,,
3336       [.quad 0],,
3337       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
3338         [Define if your assembler supports the .quad directive.])])
3339
3340     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
3341       gcc_cv_as_ix86_sahf,,,
3342       [.code64
3343        sahf],,
3344       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
3345         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
3346
3347     gcc_GAS_CHECK_FEATURE([swap suffix],
3348       gcc_cv_as_ix86_swap,,,
3349       [movl.s %esp, %ebp],,
3350       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
3351         [Define if your assembler supports the swap suffix.])])
3352
3353     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
3354       gcc_cv_as_ix86_diff_sect_delta,,,
3355       [.section .rodata
3356 .L1:
3357         .long .L2-.L1
3358         .long .L3-.L1
3359         .text
3360 .L3:    nop
3361 .L2:    nop],,
3362       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
3363         [Define if your assembler supports the subtraction of symbols in different sections.])])
3364
3365     # These two are used unconditionally by i386.[ch]; it is to be defined
3366     # to 1 if the feature is present, 0 otherwise.
3367     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
3368         gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
3369 [       .text
3370 .L0:
3371         nop
3372         .data
3373         .long .L0@GOTOFF])
3374     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
3375       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
3376       [Define true if the assembler supports '.long foo@GOTOFF'.])
3377
3378     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
3379         gcc_cv_as_ix86_rep_lock_prefix,,,
3380         [rep movsl
3381          lock addl %edi, (%eax,%esi)
3382          lock orl $0, (%esp)],,
3383         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
3384           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
3385
3386     ;;
3387
3388   ia64*-*-*)
3389     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
3390         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
3391 [       .text
3392         addl r15 = @ltoffx(x#), gp
3393         ;;
3394         ld8.mov r16 = [[r15]], x#],,
3395     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
3396           [Define if your assembler supports ltoffx and ldxmov relocations.])])
3397
3398     ;;
3399
3400   powerpc*-*-*)
3401     case $target in
3402       *-*-aix*) conftest_s='    .machine "pwr5"
3403         .csect .text[[PR]]
3404         mfcr 3,128';;
3405       *-*-darwin*)
3406         gcc_GAS_CHECK_FEATURE([.machine directive support],
3407           gcc_cv_as_machine_directive,,,
3408           [     .machine ppc7400])
3409         if test x$gcc_cv_as_machine_directive != xyes; then
3410           echo "*** This target requires an assembler supporting \".machine\"" >&2
3411           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
3412           test x$build = x$target && exit 1
3413         fi
3414         conftest_s='    .text
3415         mfcr r3,128';;
3416       *) conftest_s='   .machine power4
3417         .text
3418         mfcr 3,128';;
3419     esac
3420
3421     gcc_GAS_CHECK_FEATURE([mfcr field support],
3422       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
3423       [$conftest_s],,
3424       [AC_DEFINE(HAVE_AS_MFCRF, 1,
3425           [Define if your assembler supports mfcr field.])])
3426
3427     case $target in
3428       *-*-aix*) conftest_s='    .machine "pwr5"
3429         .csect .text[[PR]]
3430         popcntb 3,3';;
3431       *) conftest_s='   .machine power5
3432         .text
3433         popcntb 3,3';;
3434     esac
3435
3436     gcc_GAS_CHECK_FEATURE([popcntb support],
3437       gcc_cv_as_powerpc_popcntb, [2,17,0],,
3438       [$conftest_s],,
3439       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
3440           [Define if your assembler supports popcntb field.])])
3441
3442     case $target in
3443       *-*-aix*) conftest_s='    .machine "pwr5x"
3444         .csect .text[[PR]]
3445         frin 1,1';;
3446       *) conftest_s='   .machine power5
3447         .text
3448         frin 1,1';;
3449     esac
3450
3451     gcc_GAS_CHECK_FEATURE([fp round support],
3452       gcc_cv_as_powerpc_fprnd, [2,17,0],,
3453       [$conftest_s],,
3454       [AC_DEFINE(HAVE_AS_FPRND, 1,
3455           [Define if your assembler supports fprnd.])])
3456
3457     case $target in
3458       *-*-aix*) conftest_s='    .machine "pwr6"
3459         .csect .text[[PR]]
3460         mffgpr 1,3';;
3461       *) conftest_s='   .machine power6
3462         .text
3463         mffgpr 1,3';;
3464     esac
3465
3466     gcc_GAS_CHECK_FEATURE([move fp gpr support],
3467       gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
3468       [$conftest_s],,
3469       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
3470           [Define if your assembler supports mffgpr and mftgpr.])])
3471
3472     case $target in
3473       *-*-aix*) conftest_s='    .csect .text[[PR]]
3474 LCF..0:
3475         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
3476       *-*-darwin*)
3477         conftest_s='    .text
3478 LCF0:
3479         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
3480       *) conftest_s='   .text
3481 .LCF0:
3482         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
3483     esac
3484
3485     gcc_GAS_CHECK_FEATURE([rel16 relocs],
3486       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
3487       [$conftest_s],,
3488       [AC_DEFINE(HAVE_AS_REL16, 1,
3489           [Define if your assembler supports R_PPC_REL16 relocs.])])
3490
3491     case $target in
3492       *-*-aix*) conftest_s='    .machine "pwr6"
3493         .csect .text[[PR]]
3494         cmpb 3,4,5';;
3495       *) conftest_s='   .machine power6
3496         .text
3497         cmpb 3,4,5';;
3498     esac
3499
3500     gcc_GAS_CHECK_FEATURE([compare bytes support],
3501       gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
3502       [$conftest_s],,
3503       [AC_DEFINE(HAVE_AS_CMPB, 1,
3504           [Define if your assembler supports cmpb.])])
3505
3506     case $target in
3507       *-*-aix*) conftest_s='    .machine "pwr6"
3508         .csect .text[[PR]]
3509         dadd 1,2,3';;
3510       *) conftest_s='   .machine power6
3511         .text
3512         dadd 1,2,3';;
3513     esac
3514
3515     gcc_GAS_CHECK_FEATURE([decimal float support],
3516       gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
3517       [$conftest_s],,
3518       [AC_DEFINE(HAVE_AS_DFP, 1,
3519           [Define if your assembler supports DFP instructions.])])
3520
3521     case $target in
3522       *-*-aix*) conftest_s='    .machine "pwr7"
3523         .csect .text[[PR]]
3524         lxvd2x 1,2,3';;
3525       *) conftest_s='   .machine power7
3526         .text
3527         lxvd2x 1,2,3';;
3528     esac
3529
3530     gcc_GAS_CHECK_FEATURE([vector-scalar support],
3531       gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
3532       [$conftest_s],,
3533       [AC_DEFINE(HAVE_AS_VSX, 1,
3534           [Define if your assembler supports VSX instructions.])])
3535
3536     case $target in
3537       *-*-aix*) conftest_s='    .machine "pwr7"
3538         .csect .text[[PR]]
3539         popcntd 3,3';;
3540       *) conftest_s='   .machine power7
3541         .text
3542         popcntd 3,3';;
3543     esac
3544
3545     gcc_GAS_CHECK_FEATURE([popcntd support],
3546       gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
3547       [$conftest_s],,
3548       [AC_DEFINE(HAVE_AS_POPCNTD, 1,
3549           [Define if your assembler supports POPCNTD instructions.])])
3550
3551     case $target in
3552       *-*-aix*) conftest_s='    .csect .text[[PR]]
3553         lwsync';;
3554       *) conftest_s='   .text
3555         lwsync';;
3556     esac
3557
3558     gcc_GAS_CHECK_FEATURE([lwsync support],
3559       gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
3560       [$conftest_s],,
3561       [AC_DEFINE(HAVE_AS_LWSYNC, 1,
3562           [Define if your assembler supports LWSYNC instructions.])])
3563
3564     case $target in
3565       *-*-aix*) conftest_s='    .machine "476"
3566         .csect .text[[PR]]
3567         dci 0';;
3568       *) conftest_s='   .machine "476"
3569         .text
3570         dci 0';;
3571     esac
3572
3573     gcc_GAS_CHECK_FEATURE([data cache invalidate support],
3574       gcc_cv_as_powerpc_dci, [9,99,0], -a32,
3575       [$conftest_s],,
3576       [AC_DEFINE(HAVE_AS_DCI, 1,
3577           [Define if your assembler supports the DCI/ICI instructions.])])
3578
3579     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3580       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
3581       [.gnu_attribute 4,1],,
3582       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3583           [Define if your assembler supports .gnu_attribute.])])
3584
3585     gcc_GAS_CHECK_FEATURE([tls marker support],
3586       gcc_cv_as_powerpc_tls_markers, [2,20,0],,
3587       [ bl __tls_get_addr(x@tlsgd)],,
3588       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
3589           [Define if your assembler supports arg info for __tls_get_addr.])])
3590
3591     case $target in
3592       *-*-aix*)
3593         gcc_GAS_CHECK_FEATURE([.ref support],
3594           gcc_cv_as_aix_ref, [2.21.0],,
3595           [     .csect stuff[[rw]]
3596              stuff:
3597                 .long 1
3598                 .extern sym
3599                 .ref sym
3600           ],,
3601           [AC_DEFINE(HAVE_AS_REF, 1,
3602             [Define if your assembler supports .ref])])
3603         ;;
3604     esac
3605     ;;
3606
3607   mips*-*-*)
3608     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3609       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
3610 [       lw $4,%gp_rel(foo)($4)],,
3611       [if test x$target_cpu_default = x
3612        then target_cpu_default=MASK_EXPLICIT_RELOCS
3613        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
3614        fi])
3615     gcc_GAS_CHECK_FEATURE([-mno-shared support],
3616       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
3617       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
3618                  [Define if the assembler understands -mno-shared.])])
3619
3620     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3621       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
3622       [.gnu_attribute 4,1],,
3623       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3624           [Define if your assembler supports .gnu_attribute.])])
3625
3626     gcc_GAS_CHECK_FEATURE([.dtprelword support],
3627       gcc_cv_as_mips_dtprelword, [2,18,0],,
3628       [.section .tdata,"awT",@progbits
3629 x:
3630         .word 2
3631         .text
3632         .dtprelword x+0x8000],,
3633       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
3634           [Define if your assembler supports .dtprelword.])])
3635
3636     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
3637     gcc_cv_as_ld_jalr_reloc=no
3638     if test $gcc_cv_as_mips_explicit_relocs = yes; then
3639       if test $in_tree_ld = yes ; then
3640         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
3641            && test $in_tree_ld_is_elf = yes; then
3642           gcc_cv_as_ld_jalr_reloc=yes
3643         fi
3644       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
3645         echo '  .ent x' > conftest.s
3646         echo 'x:        ld $2,%got_disp(y)($3)' >> conftest.s
3647         echo '  ld $25,%call16(y)($28)' >> conftest.s
3648         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
3649         echo '1:        jalr $25' >> conftest.s
3650         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
3651         echo '1:        jalr $25' >> conftest.s
3652         echo '  .end x' >> conftest.s
3653         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
3654            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
3655           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
3656              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
3657             gcc_cv_as_ld_jalr_reloc=yes
3658           fi
3659         fi
3660         rm -f conftest.*
3661       fi
3662     fi
3663     if test $gcc_cv_as_ld_jalr_reloc = yes; then
3664       if test x$target_cpu_default = x; then
3665         target_cpu_default=MASK_RELAX_PIC_CALLS
3666       else
3667         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
3668       fi
3669     fi
3670     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
3671
3672     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
3673       [gcc_cv_ld_mips_personality_relaxation],
3674       [gcc_cv_ld_mips_personality_relaxation=no
3675        if test $in_tree_ld = yes ; then
3676          if test "$gcc_cv_gld_major_version" -eq 2 \
3677                  -a "$gcc_cv_gld_minor_version" -ge 21 \
3678                  -o "$gcc_cv_gld_major_version" -gt 2; then
3679            gcc_cv_ld_mips_personality_relaxation=yes
3680          fi
3681        elif test x$gcc_cv_as != x \
3682                  -a x$gcc_cv_ld != x \
3683                  -a x$gcc_cv_readelf != x ; then
3684          cat > conftest.s <<EOF
3685         .cfi_startproc
3686         .cfi_personality 0x80,indirect_ptr
3687         .ent test
3688 test:
3689         nop
3690         .end test
3691         .cfi_endproc
3692
3693         .section .data,"aw",@progbits
3694 indirect_ptr:
3695         .dc.a personality
3696 EOF
3697          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
3698             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
3699            if $gcc_cv_readelf -d conftest 2>&1 \
3700               | grep TEXTREL > /dev/null 2>&1; then
3701              :
3702            elif $gcc_cv_readelf --relocs conftest 2>&1 \
3703                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
3704              :
3705            else
3706              gcc_cv_ld_mips_personality_relaxation=yes
3707            fi
3708          fi
3709        fi
3710        rm -f conftest.s conftest.o conftest])
3711     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
3712             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
3713       [Define if your linker can relax absolute .eh_frame personality
3714 pointers into PC-relative form.])
3715     fi
3716     ;;
3717 esac
3718
3719 # Mips and HP-UX need the GNU assembler.
3720 # Linux on IA64 might be able to use the Intel assembler.
3721
3722 case "$target" in
3723   mips*-*-* | *-*-hpux* )
3724     if test x$gas_flag = xyes \
3725        || test x"$host" != x"$build" \
3726        || test ! -x "$gcc_cv_as" \
3727        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
3728       :
3729     else
3730       echo "*** This configuration requires the GNU assembler" >&2
3731       exit 1
3732     fi
3733     ;;
3734 esac
3735
3736 # ??? Not all targets support dwarf2 debug_line, even within a version
3737 # of gas.  Moreover, we need to emit a valid instruction to trigger any
3738 # info to the output file.  So, as supported targets are added to gas 2.11,
3739 # add some instruction here to (also) show we expect this might work.
3740 # ??? Once 2.11 is released, probably need to add first known working
3741 # version to the per-target configury.
3742 case "$target" in
3743   i?86*-*-* | mips*-*-* | alpha*-*-* | powerpc*-*-* | sparc*-*-* | m68*-*-* \
3744   | x86_64*-*-* | hppa*-*-* | arm*-*-* \
3745   | xstormy16*-*-* | cris-*-* | crisv32-*-* | xtensa*-*-* | bfin-*-* | score*-*-* \
3746   | spu-*-* | fido*-*-* | m32c-*-*)
3747     insn="nop"
3748     ;;
3749   ia64*-*-* | s390*-*-*)
3750     insn="nop 0"
3751     ;;
3752   mmix-*-*)
3753     insn="swym 0"
3754     ;;
3755 esac
3756 if test x"$insn" != x; then
3757  conftest_s="\
3758         .file 1 \"conftest.s\"
3759         .loc 1 3 0
3760         $insn"
3761  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
3762   gcc_cv_as_dwarf2_debug_line,
3763   [elf,2,11,0],, [$conftest_s],
3764   [if test x$gcc_cv_objdump != x \
3765    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
3766       | grep debug_line > /dev/null 2>&1; then
3767      gcc_cv_as_dwarf2_debug_line=yes
3768    fi])
3769
3770 # The .debug_line file table must be in the exact order that
3771 # we specified the files, since these indices are also used
3772 # by DW_AT_decl_file.  Approximate this test by testing if
3773 # the assembler bitches if the same index is assigned twice.
3774  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
3775   gcc_cv_as_dwarf2_file_buggy,,,
3776 [       .file 1 "foo.s"
3777         .file 1 "bar.s"])
3778
3779  if test $gcc_cv_as_dwarf2_debug_line = yes \
3780  && test $gcc_cv_as_dwarf2_file_buggy = no; then
3781         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
3782   [Define if your assembler supports dwarf2 .file/.loc directives,
3783    and preserves file table indices exactly as given.])
3784  fi
3785
3786  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
3787   gcc_cv_as_gdwarf2_flag,
3788   [elf,2,11,0], [--gdwarf2], [$insn],,
3789   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
3790 [Define if your assembler supports the --gdwarf2 option.])])
3791
3792  gcc_GAS_CHECK_FEATURE([--gstabs option],
3793   gcc_cv_as_gstabs_flag,
3794   [elf,2,11,0], [--gstabs], [$insn],
3795   [# The native Solaris 9/Intel assembler doesn't understand --gstabs
3796    # and warns about it, but still exits successfully.  So check for
3797    # this.
3798    if AC_TRY_COMMAND([$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null])
3799    then :
3800    else gcc_cv_as_gstabs_flag=yes
3801    fi],
3802   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
3803 [Define if your assembler supports the --gstabs option.])])
3804
3805  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
3806   gcc_cv_as_debug_prefix_map_flag,
3807   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
3808   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
3809 [Define if your assembler supports the --debug-prefix-map option.])])
3810 fi
3811
3812 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
3813  ,,
3814 [.lcomm bar,4,16],,
3815 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
3816   [Define if your assembler supports .lcomm with an alignment field.])])
3817
3818 AC_ARG_ENABLE(gnu-unique-object,
3819  [  --enable-gnu-unique-object  enable the use of the @gnu_unique_object ELF extension on
3820                                 glibc systems],
3821  [case $enable_gnu_unique_object in
3822     yes | no) ;;
3823     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
3824 Valid choices are 'yes' and 'no'.]) ;;
3825   esac],
3826  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
3827    [elf,2,19,52],,
3828    [.type foo, @gnu_unique_object],,
3829 # Also check for ld.so support, i.e. glibc 2.11 or higher.
3830    [[if test x$host = x$build -a x$host = x$target &&
3831        glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
3832       glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
3833       glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`
3834       glibcnum=`expr $glibcmajor \* 1000 + $glibcminor`
3835       if test "$glibcnum" -ge 2011 ; then
3836         enable_gnu_unique_object=yes
3837       fi
3838     fi]])])
3839 if test x$enable_gnu_unique_object = xyes; then
3840   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
3841    [Define if your assembler supports @gnu_unique_object.])
3842 fi
3843
3844 AC_CACHE_CHECK([assembler for tolerance to line number 0],
3845  [gcc_cv_as_line_zero],
3846  [gcc_cv_as_line_zero=no
3847   if test $in_tree_gas = yes; then
3848     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
3849   elif test "x$gcc_cv_as" != x; then
3850     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
3851     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
3852        test "x`cat conftest.out`" = x
3853     then
3854       gcc_cv_as_line_zero=yes
3855     else
3856       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
3857       cat conftest.s >&AS_MESSAGE_LOG_FD
3858       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
3859       cat conftest.out >&AS_MESSAGE_LOG_FD
3860     fi
3861     rm -f conftest.o conftest.s conftest.out
3862   fi])
3863 if test "x$gcc_cv_as_line_zero" = xyes; then
3864   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
3865 [Define if the assembler won't complain about a line such as # 0 "" 2.])
3866 fi
3867
3868 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
3869 gcc_cv_ld_eh_frame_hdr=no
3870 if test $in_tree_ld = yes ; then
3871   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
3872      && test $in_tree_ld_is_elf = yes; then
3873     gcc_cv_ld_eh_frame_hdr=yes
3874   fi
3875 elif test x$gcc_cv_ld != x; then
3876         # Check if linker supports --eh-frame-hdr option
3877         if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
3878                 gcc_cv_ld_eh_frame_hdr=yes
3879         fi
3880 fi
3881 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
3882 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
3883         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
3884 [Define if your linker supports --eh-frame-hdr option.])
3885 fi
3886 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
3887
3888 AC_MSG_CHECKING(linker position independent executable support)
3889 gcc_cv_ld_pie=no
3890 if test $in_tree_ld = yes ; then
3891   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
3892      && test $in_tree_ld_is_elf = yes; then
3893     gcc_cv_ld_pie=yes
3894   fi
3895 elif test x$gcc_cv_ld != x; then
3896         # Check if linker supports -pie option
3897         if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
3898                 gcc_cv_ld_pie=yes
3899         fi
3900 fi
3901 if test x"$gcc_cv_ld_pie" = xyes; then
3902         AC_DEFINE(HAVE_LD_PIE, 1,
3903 [Define if your linker supports -pie option.])
3904 fi
3905 AC_MSG_RESULT($gcc_cv_ld_pie)
3906
3907 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
3908 gcc_cv_ld_eh_gc_sections=no
3909 if test $in_tree_ld = yes ; then
3910   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
3911      && test $in_tree_ld_is_elf = yes; then
3912     gcc_cv_ld_eh_gc_sections=yes
3913   fi
3914 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
3915   cat > conftest.s <<EOF
3916         .section        .text
3917 .globl _start
3918         .type _start, @function
3919 _start:
3920         .long foo
3921         .size _start, .-_start
3922         .section        .text.foo,"ax",@progbits
3923         .type foo, @function
3924 foo:
3925         .long 0
3926         .size foo, .-foo
3927         .section        .gcc_except_table.foo,"a",@progbits
3928 .L0:
3929         .long 0
3930         .section        .eh_frame,"a",@progbits
3931         .long .L0
3932 EOF
3933   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3934     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3935          | grep "gc-sections option ignored" > /dev/null; then
3936       gcc_cv_ld_eh_gc_sections=no
3937     elif $gcc_cv_objdump -h conftest 2> /dev/null \
3938          | grep gcc_except_table > /dev/null; then
3939       gcc_cv_ld_eh_gc_sections=yes
3940       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
3941       if test x$gcc_cv_as_comdat_group != xyes; then
3942         gcc_cv_ld_eh_gc_sections=no
3943         cat > conftest.s <<EOF
3944         .section        .text
3945 .globl _start
3946         .type _start, @function
3947 _start:
3948         .long foo
3949         .size _start, .-_start
3950         .section        .gnu.linkonce.t.foo,"ax",@progbits
3951         .type foo, @function
3952 foo:
3953         .long 0
3954         .size foo, .-foo
3955         .section        .gcc_except_table.foo,"a",@progbits
3956 .L0:
3957         .long 0
3958         .section        .eh_frame,"a",@progbits
3959         .long .L0
3960 EOF
3961         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3962           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3963                | grep "gc-sections option ignored" > /dev/null; then
3964             gcc_cv_ld_eh_gc_sections=no
3965           elif $gcc_cv_objdump -h conftest 2> /dev/null \
3966                | grep gcc_except_table > /dev/null; then
3967             gcc_cv_ld_eh_gc_sections=yes
3968           fi
3969         fi
3970       fi
3971     fi
3972   fi
3973   rm -f conftest.s conftest.o conftest
3974 fi
3975 case "$target" in
3976   hppa*-*-linux*)
3977     # ??? This apparently exposes a binutils bug with PC-relative relocations.
3978     gcc_cv_ld_eh_gc_sections=no
3979     ;;
3980 esac
3981 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
3982         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
3983   [Define if your linker supports garbage collection of
3984    sections in presence of EH frames.])
3985 fi
3986 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
3987
3988 # --------
3989 # UNSORTED
3990 # --------
3991
3992 AC_CACHE_CHECK(linker --as-needed support,
3993 gcc_cv_ld_as_needed,
3994 [gcc_cv_ld_as_needed=no
3995 if test $in_tree_ld = yes ; then
3996   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
3997      && test $in_tree_ld_is_elf = yes; then
3998     gcc_cv_ld_as_needed=yes
3999   fi
4000 elif test x$gcc_cv_ld != x; then
4001         # Check if linker supports --as-needed and --no-as-needed options
4002         if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
4003                 gcc_cv_ld_as_needed=yes
4004         fi
4005 fi
4006 ])
4007 if test x"$gcc_cv_ld_as_needed" = xyes; then
4008         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
4009 [Define if your linker supports --as-needed and --no-as-needed options.])
4010 fi
4011
4012 case "$target:$tm_file" in
4013   powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
4014     AC_CACHE_CHECK(linker support for omitting dot symbols,
4015     gcc_cv_ld_no_dot_syms,
4016     [gcc_cv_ld_no_dot_syms=no
4017     if test $in_tree_ld = yes ; then
4018       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
4019         gcc_cv_ld_no_dot_syms=yes
4020       fi
4021     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4022       cat > conftest1.s <<EOF
4023         .text
4024         bl .foo
4025 EOF
4026       cat > conftest2.s <<EOF
4027         .section ".opd","aw"
4028         .align 3
4029         .globl foo
4030         .type foo,@function
4031 foo:
4032         .quad .LEfoo,.TOC.@tocbase,0
4033         .text
4034 .LEfoo:
4035         blr
4036         .size foo,.-.LEfoo
4037 EOF
4038       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
4039          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
4040          && $gcc_cv_ld -melf64ppc -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
4041         gcc_cv_ld_no_dot_syms=yes
4042       fi
4043       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
4044     fi
4045     ])
4046     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
4047       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
4048     [Define if your PowerPC64 linker only needs function descriptor syms.])
4049     fi
4050
4051     AC_CACHE_CHECK(linker large toc support,
4052     gcc_cv_ld_large_toc,
4053     [gcc_cv_ld_large_toc=no
4054     if test $in_tree_ld = yes ; then
4055       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
4056         gcc_cv_ld_large_toc=yes
4057       fi
4058     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
4059       cat > conftest.s <<EOF
4060         .section ".tbss","awT",@nobits
4061         .align 3
4062 ie0:    .space 8
4063         .global _start
4064         .text
4065 _start:
4066         addis 9,13,ie0@got@tprel@ha
4067         ld 9,ie0@got@tprel@l(9)
4068 EOF
4069       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
4070          && $gcc_cv_ld -melf64ppc --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
4071         gcc_cv_ld_large_toc=yes
4072       fi
4073       rm -f conftest conftest.o conftest.s
4074     fi
4075     ])
4076     if test x"$gcc_cv_ld_large_toc" = xyes; then
4077       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
4078     [Define if your PowerPC64 linker supports a large TOC.])
4079     fi
4080     ;;
4081 esac
4082
4083 AC_CACHE_CHECK(linker --build-id support,
4084   gcc_cv_ld_buildid,
4085   [gcc_cv_ld_buildid=no
4086   if test $in_tree_ld = yes ; then
4087     if test "$gcc_cv_gld_major_version" -eq 2 -a \
4088        "$gcc_cv_gld_minor_version" -ge 18 -o \
4089        "$gcc_cv_gld_major_version" -gt 2 \
4090        && test $in_tree_ld_is_elf = yes; then
4091       gcc_cv_ld_buildid=yes
4092     fi
4093   elif test x$gcc_cv_ld != x; then
4094     if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
4095       gcc_cv_ld_buildid=yes
4096     fi
4097   fi])
4098 if test x"$gcc_cv_ld_buildid" = xyes; then
4099   AC_DEFINE(HAVE_LD_BUILDID, 1,
4100   [Define if your linker supports --build-id.])
4101 fi
4102
4103 AC_ARG_ENABLE(linker-build-id,
4104 [  --enable-linker-build-id
4105                           compiler will always pass --build-id to linker],
4106 [],
4107 enable_linker_build_id=no)
4108
4109 if test x"$enable_linker_build_id" = xyes; then
4110   if test x"$gcc_cv_ld_buildid" = xyes; then
4111     AC_DEFINE(ENABLE_LD_BUILDID, 1,
4112     [Define if gcc should always pass --build-id to linker.])
4113   else
4114     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
4115   fi
4116 fi
4117
4118 # In binutils 2.21, GNU ld gained support for new emulations fully
4119 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
4120 AC_CACHE_CHECK(linker *_sol2 emulation support,
4121   gcc_cv_ld_sol2_emulation,
4122   [gcc_cv_ld_sol2_emulation=no
4123   if test $in_tree_ld = yes ; then
4124     if test "$gcc_cv_gld_major_version" -eq 2 -a \
4125        "$gcc_cv_gld_minor_version" -ge 21 -o \
4126        "$gcc_cv_gld_major_version" -gt 2 \
4127        && test $in_tree_ld_is_elf = yes; then
4128       gcc_cv_ld_sol2_emulation=yes
4129     fi
4130   elif test x$gcc_cv_ld != x; then
4131     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
4132        grep _sol2 > /dev/null; then
4133       gcc_cv_ld_sol2_emulation=yes
4134     fi
4135   fi])
4136 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
4137   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
4138   [Define if your linker supports the *_sol2 emulations.])
4139 fi
4140
4141 AC_CACHE_CHECK(linker --sysroot support,
4142   gcc_cv_ld_sysroot,
4143   [gcc_cv_ld_sysroot=no
4144   if test $in_tree_ld = yes ; then
4145       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
4146         gcc_cv_ld_sysroot=yes
4147       fi
4148   elif test x$gcc_cv_ld != x; then
4149     if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
4150       gcc_cv_ld_sysroot=yes
4151     fi
4152   fi])
4153 if test x"$gcc_cv_ld_sysroot" = xyes; then
4154   AC_DEFINE(HAVE_LD_SYSROOT, 1,
4155   [Define if your linker supports --sysroot.])
4156 fi
4157
4158 if test x$with_sysroot = x && test x$host = x$target \
4159    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4160    && test "$prefix" != "NONE"; then
4161   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4162 [Define to PREFIX/include if cpp should also search that directory.])
4163 fi
4164
4165 # Test for stack protector support in target C library.
4166 AC_CACHE_CHECK(__stack_chk_fail in target C library,
4167       gcc_cv_libc_provides_ssp,
4168       [gcc_cv_libc_provides_ssp=no
4169     case "$target" in
4170        *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
4171       if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4172         if test "x$with_headers" != x; then
4173           glibc_header_dir=$with_headers
4174         elif test "x$with_sysroot" = x; then
4175           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
4176         elif test "x$with_build_sysroot" != "x"; then
4177           glibc_header_dir="${with_build_sysroot}/usr/include"
4178         elif test "x$with_sysroot" = xyes; then
4179           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
4180         else
4181           glibc_header_dir="${with_sysroot}/usr/include"
4182         fi
4183       else
4184         glibc_header_dir=/usr/include
4185       fi
4186       [# glibc 2.4 and later provides __stack_chk_fail and
4187       # either __stack_chk_guard, or TLS access to stack guard canary.
4188       if test -f $glibc_header_dir/features.h \
4189          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
4190             $glibc_header_dir/features.h > /dev/null; then
4191         if $EGREP '^[   ]*#[    ]*define[       ]+__GLIBC__[    ]+([1-9][0-9]|[3-9])' \
4192            $glibc_header_dir/features.h > /dev/null; then
4193           gcc_cv_libc_provides_ssp=yes
4194         elif $EGREP '^[         ]*#[    ]*define[       ]+__GLIBC__[    ]+2' \
4195              $glibc_header_dir/features.h > /dev/null \
4196              && $EGREP '^[      ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+([1-9][0-9]|[4-9])' \
4197              $glibc_header_dir/features.h > /dev/null; then
4198           gcc_cv_libc_provides_ssp=yes
4199         elif $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
4200              $glibc_header_dir/features.h > /dev/null && \
4201              test -f $glibc_header_dir/bits/uClibc_config.h && \
4202              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
4203              $glibc_header_dir/bits/uClibc_config.h > /dev/null; then
4204           gcc_cv_libc_provides_ssp=yes
4205         fi
4206       fi]
4207         ;;
4208        *-*-gnu*)
4209          # Avoid complicated tests (see
4210          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
4211          # simply assert that glibc does provide this, which is true for all
4212          # realistically usable GNU/Hurd configurations.
4213          gcc_cv_libc_provides_ssp=yes;;
4214        *-*-darwin* | *-*-freebsd*)
4215          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
4216            [echo "no __stack_chk_fail on this target"])
4217         ;;
4218   *) gcc_cv_libc_provides_ssp=no ;;
4219     esac])
4220
4221 if test x$gcc_cv_libc_provides_ssp = xyes; then
4222   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
4223             [Define if your target C library provides stack protector support])
4224 fi
4225
4226 # Check if TFmode long double should be used by default or not.
4227 # Some glibc targets used DFmode long double, but with glibc 2.4
4228 # and later they can use TFmode.
4229 case "$target" in
4230   powerpc*-*-linux* | \
4231   powerpc*-*-gnu* | \
4232   sparc*-*-linux* | \
4233   s390*-*-linux* | \
4234   alpha*-*-linux*)
4235     AC_ARG_WITH(long-double-128,
4236 [  --with-long-double-128  Use 128-bit long double by default.],
4237       gcc_cv_target_ldbl128="$with_long_double_128",
4238       [[gcc_cv_target_ldbl128=no
4239       if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
4240         if test "x$with_sysroot" = x; then
4241           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
4242         elif test "x$with_build_sysroot" != "x"; then
4243           glibc_header_dir="${with_build_sysroot}/usr/include"
4244         elif test "x$with_sysroot" = xyes; then
4245           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
4246         else
4247           glibc_header_dir="${with_sysroot}/usr/include"
4248         fi
4249       else
4250         glibc_header_dir=/usr/include
4251       fi
4252       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
4253         $glibc_header_dir/bits/wordsize.h > /dev/null 2>&1 \
4254       && gcc_cv_target_ldbl128=yes
4255       ]])
4256     ;;
4257 esac
4258 if test x$gcc_cv_target_ldbl128 = xyes; then
4259   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
4260             [Define if TFmode long double should be the default])
4261 fi
4262
4263 # Find out what GC implementation we want, or may, use.
4264 AC_ARG_WITH(gc,
4265 [  --with-gc={page,zone}   choose the garbage collection mechanism to use
4266                           with the compiler],
4267 [case "$withval" in
4268   page)
4269     GGC=ggc-$withval
4270     ;;
4271   zone)
4272     GGC=ggc-$withval
4273     AC_DEFINE(GGC_ZONE, 1, [Define if the zone collector is in use])
4274     ;;
4275   *)
4276     AC_MSG_ERROR([$withval is an invalid option to --with-gc])
4277     ;;
4278 esac],
4279 [GGC=ggc-page])
4280 AC_SUBST(GGC)
4281 echo "Using $GGC for garbage collection."
4282
4283 # Libraries to use on the host.  This will normally be set by the top
4284 # level Makefile.  Here we simply capture the value for our Makefile.
4285 if test -z "${HOST_LIBS+set}"; then
4286   HOST_LIBS=
4287 fi
4288 AC_SUBST(HOST_LIBS)
4289
4290 # Use the system's zlib library.
4291 zlibdir=-L../zlib
4292 zlibinc="-I\$(srcdir)/../zlib"
4293 AC_ARG_WITH(system-zlib,
4294 [  --with-system-zlib      use installed libz],
4295 zlibdir=
4296 zlibinc=
4297 )
4298 AC_SUBST(zlibdir)
4299 AC_SUBST(zlibinc)
4300
4301 dnl Very limited version of automake's enable-maintainer-mode
4302
4303 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
4304   dnl maintainer-mode is disabled by default
4305   AC_ARG_ENABLE(maintainer-mode,
4306 [  --enable-maintainer-mode
4307                           enable make rules and dependencies not useful
4308                           (and sometimes confusing) to the casual installer],
4309       maintainer_mode=$enableval,
4310       maintainer_mode=no)
4311
4312 AC_MSG_RESULT($maintainer_mode)
4313
4314 if test "$maintainer_mode" = "yes"; then
4315   MAINT=''
4316 else
4317   MAINT='#'
4318 fi
4319 AC_SUBST(MAINT)dnl
4320
4321 # --------------
4322 # Language hooks
4323 # --------------
4324
4325 # Make empty files to contain the specs and options for each language.
4326 # Then add #include lines to for a compiler that has specs and/or options.
4327
4328 subdirs=
4329 lang_opt_files=
4330 lang_specs_files=
4331 lang_tree_files=
4332 # These (without "all_") are set in each config-lang.in.
4333 # `language' must be a single word so is spelled singularly.
4334 all_languages=
4335 all_compilers=
4336 all_outputs='Makefile gccbug'
4337 # List of language makefile fragments.
4338 all_lang_makefrags=
4339 # Additional files for gengtype
4340 all_gtfiles="$target_gtfiles"
4341
4342 # These are the languages that are set in --enable-languages,
4343 # and are available in the GCC tree.
4344 all_selected_languages=
4345
4346 # Add the language fragments.
4347 # Languages are added via two mechanisms.  Some information must be
4348 # recorded in makefile variables, these are defined in config-lang.in.
4349 # We accumulate them and plug them into the main Makefile.
4350 # The other mechanism is a set of hooks for each of the main targets
4351 # like `clean', `install', etc.
4352
4353 language_hooks="Make-hooks"
4354
4355 for lang in ${srcdir}/*/config-lang.in
4356 do
4357 changequote(,)dnl
4358         test "$lang" = "${srcdir}/*/config-lang.in" && continue
4359
4360         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
4361         if test "x$lang_alias" = x
4362         then
4363               echo "$lang doesn't set \$language." 1>&2
4364               exit 1
4365         fi
4366         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
4367         subdirs="$subdirs $subdir"
4368
4369         # $gcc_subdir is where the gcc integration files are to be found
4370         # for a language, both for internal compiler purposes (compiler
4371         # sources implementing front-end to GCC tree converters), and for
4372         # build infrastructure purposes (Make-lang.in, etc.)
4373         #
4374         # This will be <subdir> (relative to $srcdir) if a line like
4375         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
4376         # is found in <langdir>/config-lang.in, and will remain <langdir>
4377         # otherwise.
4378         #
4379         # Except for the language alias (fetched above), the regular
4380         # "config-lang.in" contents are always retrieved from $gcc_subdir,
4381         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
4382         # only this and the language alias.
4383
4384         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
4385         if [ "$gcc_subdir" = "" ]; then
4386            gcc_subdir="$subdir"
4387         fi
4388
4389         case ",$enable_languages," in
4390         *,$lang_alias,*)
4391             all_selected_languages="$all_selected_languages $lang_alias"
4392             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
4393                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
4394             fi
4395             ;;
4396         esac
4397 changequote([,])dnl
4398
4399         language=
4400         boot_language=
4401         compilers=
4402         outputs=
4403         gtfiles=
4404         subdir_requires=
4405         . ${srcdir}/$gcc_subdir/config-lang.in
4406         if test "x$language" = x
4407         then
4408                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
4409                 exit 1
4410         fi
4411
4412         ok=:
4413         case ",$enable_languages," in
4414                 *,$lang_alias,*) ;;
4415                 *)
4416                         for i in $subdir_requires; do
4417                                 test -f "${srcdir}/$i/config-lang.in" && continue
4418                                 ok=false
4419                                 break
4420                         done
4421                 ;;
4422         esac
4423         $ok || continue
4424
4425         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
4426         if test -f $srcdir/$gcc_subdir/lang.opt; then
4427             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
4428         fi
4429         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
4430             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
4431         fi
4432         all_languages="$all_languages $language"
4433         all_compilers="$all_compilers $compilers"
4434         all_outputs="$all_outputs $outputs"
4435         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
4436         case ",$enable_languages," in
4437                 *,lto,*)
4438                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
4439                     enable_lto=yes
4440                     AC_SUBST(enable_lto)
4441                     # LTO needs to speak the platform's object file format, and has a
4442                     # number of implementations of the required binary file access APIs.
4443                     # ELF is the most common, and default.  We only link libelf if ELF
4444                     # is indeed the selected format.
4445                     LTO_BINARY_READER=${lto_binary_reader}
4446                     LTO_USE_LIBELF=-lelf
4447                     if test "x$lto_binary_reader" != "xlto-elf" ; then
4448                       LTO_USE_LIBELF=
4449                     fi
4450                     AC_SUBST(LTO_BINARY_READER)
4451                     AC_SUBST(LTO_USE_LIBELF)
4452                     ;;
4453                 *) ;;
4454         esac
4455 done
4456
4457 # Pick up gtfiles for c
4458 gtfiles=
4459 . ${srcdir}/c-config-lang.in
4460 all_gtfiles="$all_gtfiles [[c]] $gtfiles"
4461
4462 check_languages=
4463 for language in $all_selected_languages
4464 do
4465         check_languages="$check_languages check-$language"
4466 done
4467
4468 # We link each language in with a set of hooks, reached indirectly via
4469 # lang.${target}.  Only do so for selected languages.
4470
4471 rm -f Make-hooks
4472 touch Make-hooks
4473 target_list="all.cross start.encap rest.encap tags \
4474         install-common install-man install-info install-pdf install-html dvi \
4475         pdf html uninstall info man srcextra srcman srcinfo \
4476         mostlyclean clean distclean maintainer-clean install-plugin"
4477
4478 for t in $target_list
4479 do
4480         x=
4481         for lang in $all_selected_languages
4482         do
4483                 x="$x $lang.$t"
4484         done
4485         echo "lang.$t: $x" >> Make-hooks
4486 done
4487
4488 # --------
4489 # UNSORTED
4490 # --------
4491
4492 # Create .gdbinit.
4493
4494 echo "dir ." > .gdbinit
4495 echo "dir ${srcdir}" >> .gdbinit
4496 if test x$gdb_needs_out_file_path = xyes
4497 then
4498         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
4499 fi
4500 if test "x$subdirs" != x; then
4501         for s in $subdirs
4502         do
4503                 echo "dir ${srcdir}/$s" >> .gdbinit
4504         done
4505 fi
4506 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
4507
4508 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
4509 AC_SUBST(gcc_tooldir)
4510 AC_SUBST(dollar)
4511
4512 # Find a directory in which to install a shared libgcc.
4513
4514 AC_ARG_ENABLE(version-specific-runtime-libs,
4515 [  --enable-version-specific-runtime-libs
4516                           specify that runtime libraries should be
4517                           installed in a compiler-specific directory])
4518
4519 AC_ARG_WITH(slibdir,
4520 [  --with-slibdir=DIR      shared libraries in DIR [[LIBDIR]]],
4521 slibdir="$with_slibdir",
4522 if test "${enable_version_specific_runtime_libs+set}" = set; then
4523   slibdir='$(libsubdir)'
4524 elif test "$host" != "$target"; then
4525   slibdir='$(build_tooldir)/lib'
4526 else
4527   slibdir='$(libdir)'
4528 fi)
4529 AC_SUBST(slibdir)
4530
4531 # Substitute configuration variables
4532 AC_SUBST(subdirs)
4533 AC_SUBST(srcdir)
4534 AC_SUBST(all_compilers)
4535 AC_SUBST(all_gtfiles)
4536 AC_SUBST(all_lang_makefrags)
4537 AC_SUBST(all_languages)
4538 AC_SUBST(all_selected_languages)
4539 AC_SUBST(build_exeext)
4540 AC_SUBST(build_install_headers_dir)
4541 AC_SUBST(build_xm_file_list)
4542 AC_SUBST(build_xm_include_list)
4543 AC_SUBST(build_xm_defines)
4544 AC_SUBST(build_file_translate)
4545 AC_SUBST(check_languages)
4546 AC_SUBST(cpp_install_dir)
4547 AC_SUBST(xmake_file)
4548 AC_SUBST(tmake_file)
4549 AC_SUBST(TM_ENDIAN_CONFIG)
4550 AC_SUBST(TM_MULTILIB_CONFIG)
4551 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
4552 AC_SUBST(extra_gcc_objs)
4553 AC_SUBST(extra_headers_list)
4554 AC_SUBST(extra_objs)
4555 AC_SUBST(extra_parts)
4556 AC_SUBST(extra_passes)
4557 AC_SUBST(extra_programs)
4558 AC_SUBST(float_h_file)
4559 AC_SUBST(gcc_config_arguments)
4560 AC_SUBST(gcc_gxx_include_dir)
4561 AC_SUBST(host_exeext)
4562 AC_SUBST(host_xm_file_list)
4563 AC_SUBST(host_xm_include_list)
4564 AC_SUBST(host_xm_defines)
4565 AC_SUBST(out_host_hook_obj)
4566 AC_SUBST(install)
4567 AC_SUBST(lang_opt_files)
4568 AC_SUBST(lang_specs_files)
4569 AC_SUBST(lang_tree_files)
4570 AC_SUBST(local_prefix)
4571 AC_SUBST(md_file)
4572 AC_SUBST(objc_boehm_gc)
4573 AC_SUBST(out_file)
4574 AC_SUBST(out_object_file)
4575 AC_SUBST(thread_file)
4576 AC_SUBST(tm_file_list)
4577 AC_SUBST(tm_include_list)
4578 AC_SUBST(tm_defines)
4579 AC_SUBST(tm_p_file_list)
4580 AC_SUBST(tm_p_include_list)
4581 AC_SUBST(xm_file_list)
4582 AC_SUBST(xm_include_list)
4583 AC_SUBST(xm_defines)
4584 AC_SUBST(use_gcc_stdint)
4585 AC_SUBST(c_target_objs)
4586 AC_SUBST(cxx_target_objs)
4587 AC_SUBST(fortran_target_objs)
4588 AC_SUBST(target_cpu_default)
4589
4590 AC_SUBST_FILE(language_hooks)
4591
4592 # Echo link setup.
4593 if test x${build} = x${host} ; then
4594   if test x${host} = x${target} ; then
4595     echo "Links are now set up to build a native compiler for ${target}." 1>&2
4596   else
4597     echo "Links are now set up to build a cross-compiler" 1>&2
4598     echo " from ${host} to ${target}." 1>&2
4599   fi
4600 else
4601   if test x${host} = x${target} ; then
4602     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
4603     echo " for ${target}." 1>&2
4604   else
4605     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
4606     echo " from ${host} to ${target}." 1>&2
4607   fi
4608 fi
4609
4610 AC_ARG_VAR(GMPLIBS,[How to link GMP])
4611 AC_ARG_VAR(GMPINC,[How to find GMP include files])
4612
4613 AC_ARG_VAR(PPLLIBS,[How to link PPL])
4614 AC_ARG_VAR(PPLINC,[How to find PPL include files])
4615
4616 AC_ARG_VAR(CLOOGLIBS,[How to link CLOOG])
4617 AC_ARG_VAR(CLOOGINC,[How to find CLOOG include files])
4618 if test "x${CLOOGLIBS}" != "x" ; then
4619    AC_DEFINE(HAVE_cloog, 1, [Define if cloog is in use.])
4620 fi
4621
4622 AC_ARG_VAR(LIBELFLIBS,[How to link libelf])
4623 AC_ARG_VAR(LIBELFINC,[How to find libelf include files])
4624 if test "x${LIBELFLIBS}" != "x" ; then
4625    AC_DEFINE(HAVE_libelf, 1, [Define if libelf is in use.])
4626 fi
4627
4628 # Check for plugin support
4629 AC_ARG_ENABLE(plugin,
4630 [  --enable-plugin         enable plugin support],
4631 enable_plugin=$enableval,
4632 enable_plugin=yes; default_plugin=yes)
4633
4634 pluginlibs=
4635 if test x"$enable_plugin" = x"yes"; then
4636
4637   case "${host}" in
4638     *-*-darwin*)
4639       export_sym_check="$gcc_cv_nm -g"
4640     ;;
4641     *)
4642       export_sym_check="$gcc_cv_objdump -T"
4643     ;;
4644   esac
4645   AC_MSG_CHECKING([for exported symbols])
4646   echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
4647   ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
4648   if $export_sym_check conftest | grep foobar > /dev/null; then
4649     : # No need to use a flag
4650   else
4651     AC_MSG_CHECKING([for -rdynamic])
4652     ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
4653     if $export_sym_check conftest | grep foobar > /dev/null; then
4654       plugin_rdynamic=yes
4655       pluginlibs="-rdynamic"
4656     else
4657       plugin_rdynamic=no
4658       enable_plugin=no
4659     fi
4660     AC_MSG_RESULT([$plugin_rdynamic])
4661   fi
4662
4663   # Check -ldl
4664   saved_LIBS="$LIBS"
4665   AC_SEARCH_LIBS([dlopen], [dl])
4666   if test x"$ac_cv_search_dlopen" = x"-ldl"; then
4667     pluginlibs="$pluginlibs -ldl"
4668   fi
4669   LIBS="$saved_LIBS"
4670
4671   # Check that we can build shared objects with -fPIC -shared
4672   saved_LDFLAGS="$LDFLAGS"
4673   case "${host}" in
4674     *-*-darwin*)
4675       LDFLAGS="$LDFLAGS -fPIC -shared -undefined dynamic_lookup"
4676     ;;
4677     *)
4678       LDFLAGS="$LDFLAGS -fPIC -shared"
4679     ;;
4680   esac
4681   AC_MSG_CHECKING([for -fPIC -shared])
4682   AC_TRY_LINK(
4683     [extern int X;],[return X == 0;],
4684     [AC_MSG_RESULT([yes]); have_pic_shared=yes],
4685     [AC_MSG_RESULT([no]); have_pic_shared=no])
4686   if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
4687     pluginlibs=
4688     enable_plugin=no
4689   fi
4690   LDFLAGS="$saved_LDFLAGS"
4691
4692   # If plugin support had been requested but not available, fail.
4693   if test x"$enable_plugin" = x"no" ; then
4694     if test x"$default_plugin" != x"yes"; then
4695       AC_MSG_ERROR([
4696 Building GCC with plugin support requires a host that supports
4697 -fPIC, -shared, -ldl and -rdynamic.])
4698     fi
4699   fi
4700 fi
4701
4702 AC_SUBST(pluginlibs)
4703 AC_SUBST(enable_plugin)
4704 if test x"$enable_plugin" = x"yes"; then
4705   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
4706 fi
4707
4708 # Configure the subdirectories
4709 # AC_CONFIG_SUBDIRS($subdirs)
4710
4711 # Create the Makefile
4712 # and configure language subdirectories
4713 AC_CONFIG_FILES($all_outputs)
4714
4715 AC_CONFIG_COMMANDS([default],
4716 [
4717 case ${CONFIG_HEADERS} in
4718   *auto-host.h:config.in*)
4719   echo > cstamp-h ;;
4720 esac
4721 # Make sure all the subdirs exist.
4722 for d in $subdirs doc build c-family
4723 do
4724     test -d $d || mkdir $d
4725 done
4726 ],
4727 [subdirs='$subdirs'])
4728 AC_OUTPUT