gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright (C) 1997-2017 Free Software Foundation, Inc.
   5
   6 #This file is part of GCC.
   7
   8 #GCC is free software; you can redistribute it and/or modify it under
   9 #the terms of the GNU General Public License as published by the Free
  10 #Software Foundation; either version 3, or (at your option) any later
  11 #version.
  12
  13 #GCC is distributed in the hope that it will be useful, but WITHOUT
  14 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 #FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 #for more details.
  17
  18 #You should have received a copy of the GNU General Public License
  19 #along with GCC; see the file COPYING3.  If not see
  20 #<http://www.gnu.org/licenses/>.
  21
  22 # --------------------------------
  23 # Initialization and sanity checks
  24 # --------------------------------
  25
  26 AC_PREREQ(2.64)
  27 AC_INIT
  28 AC_CONFIG_SRCDIR(tree.c)
  29 AC_CONFIG_HEADER(auto-host.h:config.in)
  30
  31 gcc_version=`cat $srcdir/BASE-VER`
  32
  33 # Determine the host, build, and target systems
  34 AC_CANONICAL_BUILD
  35 AC_CANONICAL_HOST
  36 AC_CANONICAL_TARGET
  37
  38 # Determine the noncanonical host name, for Ada.
  39 ACX_NONCANONICAL_HOST
  40
  41 # Determine the noncanonical target name, for directory use.
  42 ACX_NONCANONICAL_TARGET
  43
  44 # Used for constructing correct paths for offload compilers.
  45 real_target_noncanonical=${target_noncanonical}
  46 accel_dir_suffix=
  47
  48 # Determine the target- and build-specific subdirectories
  49 GCC_TOPLEV_SUBDIRS
  50
  51 # Set program_transform_name
  52 AC_ARG_PROGRAM
  53
  54 # Check for bogus environment variables.
  55 # Test if LIBRARY_PATH contains the notation for the current directory
  56 # since this would lead to problems installing/building glibc.
  57 # LIBRARY_PATH contains the current directory if one of the following
  58 # is true:
  59 # - one of the terminals (":" and ";") is the first or last sign
  60 # - two terminals occur directly after each other
  61 # - the path contains an element with a dot in it
  62 AC_MSG_CHECKING(LIBRARY_PATH variable)
  63 changequote(,)dnl
  64 case ${LIBRARY_PATH} in
  65   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  66     library_path_setting="contains current directory"
  67     ;;
  68   *)
  69     library_path_setting="ok"
  70     ;;
  71 esac
  72 changequote([,])dnl
  73 AC_MSG_RESULT($library_path_setting)
  74 if test "$library_path_setting" != "ok"; then
  75 AC_MSG_ERROR([
  76 *** LIBRARY_PATH shouldn't contain the current directory when
  77 *** building gcc. Please change the environment variable
  78 *** and run configure again.])
  79 fi
  80
  81 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  82 # since this would lead to problems installing/building glibc.
  83 # GCC_EXEC_PREFIX contains the current directory if one of the following
  84 # is true:
  85 # - one of the terminals (":" and ";") is the first or last sign
  86 # - two terminals occur directly after each other
  87 # - the path contains an element with a dot in it
  88 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  89 changequote(,)dnl
  90 case ${GCC_EXEC_PREFIX} in
  91   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  92     gcc_exec_prefix_setting="contains current directory"
  93     ;;
  94   *)
  95     gcc_exec_prefix_setting="ok"
  96     ;;
  97 esac
  98 changequote([,])dnl
  99 AC_MSG_RESULT($gcc_exec_prefix_setting)
 100 if test "$gcc_exec_prefix_setting" != "ok"; then
 101 AC_MSG_ERROR([
 102 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
 103 *** building gcc. Please change the environment variable
 104 *** and run configure again.])
 105 fi
 106
 107 # -----------
 108 # Directories
 109 # -----------
 110
 111 # Specify the local prefix
 112 local_prefix=
 113 AC_ARG_WITH(local-prefix,
 114 [AS_HELP_STRING([--with-local-prefix=DIR],
 115                 [specifies directory to put local include])],
 116 [case "${withval}" in
 117 yes)    AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
 118 no)     ;;
 119 *)      local_prefix=$with_local_prefix ;;
 120 esac])
 121
 122 # Default local prefix if it is empty
 123 if test x$local_prefix = x; then
 124         local_prefix=/usr/local
 125 fi
 126
 127 AC_ARG_WITH([native-system-header-dir],
 128   [  --with-native-system-header-dir=dir
 129                           use dir as the directory to look for standard
 130                           system header files in.  Defaults to /usr/include.],
 131 [
 132  case ${with_native_system_header_dir} in
 133  yes|no) AC_MSG_ERROR([bad value ${withval} given for --with-native-system-header-dir]) ;;
 134  /* | [[A-Za-z]]:[[\\/]]*) ;;
 135  *) AC_MSG_ERROR([--with-native-system-header-dir argument ${withval} must be an absolute directory]) ;;
 136  esac
 137  configured_native_system_header_dir="${withval}"
 138 ], [configured_native_system_header_dir=])
 139
 140 AC_ARG_WITH(build-sysroot,
 141   [AS_HELP_STRING([--with-build-sysroot=sysroot],
 142                   [use sysroot as the system root during the build])],
 143   [if test x"$withval" != x ; then
 144      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
 145    fi],
 146   [SYSROOT_CFLAGS_FOR_TARGET=])
 147 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
 148
 149 if test "x$prefix" = xNONE; then
 150  test_prefix=/usr/local
 151 else
 152  test_prefix=$prefix
 153 fi
 154 if test "x$exec_prefix" = xNONE; then
 155  test_exec_prefix=$test_prefix
 156 else
 157  test_exec_prefix=$exec_prefix
 158 fi
 159
 160 AC_ARG_WITH(sysroot,
 161 [AS_HELP_STRING([[--with-sysroot[=DIR]]],
 162                 [search for usr/lib, usr/include, et al, within DIR])],
 163 [
 164  case ${with_sysroot} in
 165  /) ;;
 166  */) with_sysroot=`echo $with_sysroot | sed 's,/$,,'` ;;
 167  esac
 168  case ${with_sysroot} in
 169  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 170  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 171  esac
 172
 173  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 174  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 175
 176  case ${TARGET_SYSTEM_ROOT} in
 177  "${test_prefix}"|"${test_prefix}/"*|\
 178  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 179  '${prefix}'|'${prefix}/'*|\
 180  '${exec_prefix}'|'${exec_prefix}/'*)
 181    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 182    TARGET_SYSTEM_ROOT_DEFINE="$t"
 183    ;;
 184  esac
 185 ], [
 186  TARGET_SYSTEM_ROOT=
 187  TARGET_SYSTEM_ROOT_DEFINE=
 188  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 189 ])
 190 AC_SUBST(TARGET_SYSTEM_ROOT)
 191 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 192 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 193
 194 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 195 # passed in by the toplevel make and thus we'd get different behavior
 196 # depending on where we built the sources.
 197 gcc_gxx_include_dir=
 198 # Specify the g++ header file directory
 199 AC_ARG_WITH(gxx-include-dir,
 200 [AS_HELP_STRING([--with-gxx-include-dir=DIR],
 201                 [specifies directory to put g++ header files])],
 202 [case "${withval}" in
 203 yes)    AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
 204 no)     ;;
 205 *)      gcc_gxx_include_dir=$with_gxx_include_dir ;;
 206 esac])
 207
 208 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 209 if test x${gcc_gxx_include_dir} = x; then
 210   if test x${enable_version_specific_runtime_libs} = xyes; then
 211     gcc_gxx_include_dir='${libsubdir}/include/c++'
 212   else
 213     libstdcxx_incdir='include/c++/$(version)'
 214     if test x$host != x$target; then
 215        libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
 216     fi
 217     gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
 218   fi
 219 fi
 220
 221 gcc_gxx_include_dir_add_sysroot=0
 222 if test "${with_sysroot+set}" = set; then
 223   gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
 224   if test "${gcc_gxx_without_sysroot}"; then
 225     if test x${with_sysroot} != x/; then
 226       gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
 227     fi
 228     gcc_gxx_include_dir_add_sysroot=1
 229   fi
 230 fi
 231
 232 AC_ARG_WITH(cpp_install_dir,
 233 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
 234                 [install the user visible C preprocessor in DIR
 235                  (relative to PREFIX) as well as PREFIX/bin])],
 236 [if test x$withval = xyes; then
 237   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 238 elif test x$withval != xno; then
 239   cpp_install_dir=$withval
 240 fi])
 241
 242 # We would like to our source tree to be readonly.  However when releases or
 243 # pre-releases are generated, the flex/bison generated files as well as the
 244 # various formats of manuals need to be included along with the rest of the
 245 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 246 # just that.
 247
 248 AC_MSG_CHECKING([whether to place generated files in the source directory])
 249   dnl generated-files-in-srcdir is disabled by default
 250   AC_ARG_ENABLE(generated-files-in-srcdir,
 251     [AS_HELP_STRING([--enable-generated-files-in-srcdir],
 252                     [put copies of generated files in source dir
 253                      intended for creating source tarballs for users
 254                      without texinfo bison or flex])],
 255       generated_files_in_srcdir=$enableval,
 256       generated_files_in_srcdir=no)
 257
 258 AC_MSG_RESULT($generated_files_in_srcdir)
 259
 260 if test "$generated_files_in_srcdir" = "yes"; then
 261   GENINSRC=''
 262 else
 263   GENINSRC='#'
 264 fi
 265 AC_SUBST(GENINSRC)
 266
 267 # -------------------
 268 # Find default linker
 269 # -------------------
 270
 271 # With GNU ld
 272 AC_ARG_WITH(gnu-ld,
 273 [AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
 274 gnu_ld_flag="$with_gnu_ld",
 275 gnu_ld_flag=no)
 276
 277 case $target in
 278     *darwin*) ld64_flag=yes;; # Darwin can only use a ld64-compatible linker.
 279     *) ld64_flag=no;;
 280 esac
 281
 282 # With pre-defined ld
 283 AC_ARG_WITH(ld,
 284 [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
 285 DEFAULT_LINKER="$with_ld")
 286 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 287   if test ! -x "$DEFAULT_LINKER"; then
 288     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 289   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 290     gnu_ld_flag=yes
 291   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep ld64- > /dev/null; then
 292     ld64_flag=yes
 293   fi
 294   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 295         [Define to enable the use of a default linker.])
 296 fi
 297
 298 AC_MSG_CHECKING([whether a default linker was specified])
 299 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 300   if test x"$gnu_ld_flag" = x"no"; then
 301     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 302   else
 303     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 304   fi
 305 else
 306   AC_MSG_RESULT(no)
 307 fi
 308
 309 # With demangler in GNU ld
 310 AC_ARG_WITH(demangler-in-ld,
 311 [AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
 312 demangler_in_ld="$with_demangler_in_ld",
 313 demangler_in_ld=yes)
 314
 315 # ----------------------
 316 # Find default assembler
 317 # ----------------------
 318
 319 # With GNU as
 320 AC_ARG_WITH(gnu-as,
 321 [AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
 322 gas_flag="$with_gnu_as",
 323 gas_flag=no)
 324
 325 AC_ARG_WITH(as,
 326 [AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
 327 DEFAULT_ASSEMBLER="$with_as")
 328 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 329   if test ! -x "$DEFAULT_ASSEMBLER"; then
 330     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 331   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 332     gas_flag=yes
 333   fi
 334   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 335         [Define to enable the use of a default assembler.])
 336 fi
 337
 338 AC_MSG_CHECKING([whether a default assembler was specified])
 339 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 340   if test x"$gas_flag" = x"no"; then
 341     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 342   else
 343     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 344   fi
 345 else
 346   AC_MSG_RESULT(no)
 347 fi
 348
 349 # ---------------
 350 # Find C compiler
 351 # ---------------
 352
 353 # If a non-executable a.out is present (e.g. created by GNU as above even if
 354 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 355 # file, even when creating an executable, so an execution test fails.
 356 # Remove possible default executable files to avoid this.
 357 #
 358 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 359 # Autoconf includes it.
 360 rm -f a.out a.exe b.out
 361
 362 # Find the native compiler
 363 AC_PROG_CC
 364 AC_PROG_CXX
 365 ACX_PROG_GNAT([-I"$srcdir"/ada])
 366
 367 # Do configure tests with the C++ compiler, since that's what we build with.
 368 AC_LANG(C++)
 369
 370 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 371 # optimizations to be activated explicitly by the toplevel.
 372 case "$CC" in
 373   */prev-gcc/xgcc*) ;;
 374   *) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[       ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" `
 375      CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[   ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" ` ;;
 376 esac
 377 AC_SUBST(CFLAGS)
 378 AC_SUBST(CXXFLAGS)
 379
 380 # Determine PICFLAG for target gnatlib.
 381 GCC_PICFLAG_FOR_TARGET
 382 AC_SUBST(PICFLAG_FOR_TARGET)
 383
 384 # -------------------------
 385 # Check C compiler features
 386 # -------------------------
 387
 388 AC_USE_SYSTEM_EXTENSIONS
 389 AC_PROG_CPP
 390 AC_C_INLINE
 391
 392 AC_SYS_LARGEFILE
 393
 394 # sizeof(char) is 1 by definition.
 395 AC_CHECK_SIZEOF(void *)
 396 AC_CHECK_SIZEOF(short)
 397 AC_CHECK_SIZEOF(int)
 398 AC_CHECK_SIZEOF(long)
 399 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 400 GCC_STDINT_TYPES
 401 if test x"$ac_cv_c_uint64_t" = x"no" -o x"$ac_cv_c_int64_t" = x"no"; then
 402   AC_MSG_ERROR([uint64_t or int64_t not found])
 403 fi
 404
 405 # check what underlying integer type int64_t uses
 406 AC_CACHE_CHECK(for int64_t underlying type, ac_cv_int64_t_type, [
 407 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 408 #ifdef HAVE_STDINT_H
 409 #include <stdint.h>
 410 #endif
 411 template <typename T> struct X { };
 412 template <>
 413 struct X<long> { typedef long t; };
 414 ]], [[X<int64_t>::t x;]])],[ac_cv_int64_t_type=long],[ac_cv_int64_t_type="long long"])])
 415 if test "$ac_cv_int64_t_type" = "long"; then
 416   AC_DEFINE(INT64_T_IS_LONG, 1,
 417   [Define if int64_t uses long as underlying type.])
 418 else
 419 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 420 #ifdef HAVE_STDINT_H
 421 #include <stdint.h>
 422 #endif
 423 template <typename T> struct X { };
 424 template <>
 425 struct X<long long> { typedef long long t; };
 426 ]], [[X<int64_t>::t x;]])],[],[AC_MSG_ERROR([error verifying int64_t uses long long])])
 427 fi
 428
 429 AC_CACHE_CHECK(for std::swap in <utility>, ac_cv_std_swap_in_utility, [
 430 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 431 #include <utility>
 432 ]], [[int a, b; std::swap(a,b);]])],[ac_cv_std_swap_in_utility=yes],[ac_cv_std_swap_in_utility=no])])
 433 if test $ac_cv_std_swap_in_utility = yes; then
 434   AC_DEFINE(HAVE_SWAP_IN_UTILITY, 1,
 435   [Define if <utility> defines std::swap.])
 436 fi
 437
 438 # Check whether compiler is affected by placement new aliasing bug (PR 29286).
 439 # If the host compiler is affected by the bug, and we build with optimization
 440 # enabled (which happens e.g. when cross-compiling), the pool allocator may
 441 # get miscompiled.  Use -fno-strict-aliasing to work around this problem.
 442 # Since there is no reliable feature check for the presence of this bug,
 443 # we simply use a GCC version number check.  (This should never trigger for
 444 # stages 2 or 3 of a native bootstrap.)
 445 aliasing_flags=
 446 if test "$GCC" = yes; then
 447   saved_CXXFLAGS="$CXXFLAGS"
 448
 449   # The following test compilation will succeed if and only if $CXX accepts
 450   # -fno-strict-aliasing *and* is older than GCC 4.3.
 451   CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
 452   AC_MSG_CHECKING([whether $CXX is affected by placement new aliasing bug])
 453   AC_COMPILE_IFELSE([
 454 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
 455 #error compiler not affected by placement new aliasing bug
 456 #endif
 457 ],
 458     [AC_MSG_RESULT([yes]); aliasing_flags='-fno-strict-aliasing'],
 459     [AC_MSG_RESULT([no])])
 460
 461   CXXFLAGS="$saved_CXXFLAGS"
 462 fi
 463 AC_SUBST(aliasing_flags)
 464
 465
 466
 467 # ---------------------
 468 # Warnings and checking
 469 # ---------------------
 470
 471 # Check $CC warning features (if it's GCC).
 472 # We want to use -pedantic, but we don't want warnings about
 473 # * 'long long'
 474 # * variadic macros
 475 # * overlong strings
 476 # * C++11 narrowing conversions in { }
 477 # So, we only use -pedantic if we can disable those warnings.
 478
 479 # In stage 1, disable -Wformat warnings from old GCCs about new % codes
 480 AC_ARG_ENABLE(build-format-warnings,
 481   AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
 482   [],[enable_build_format_warnings=yes])
 483 AS_IF([test $enable_build_format_warnings = no],
 484       [wf_opt=-Wno-format],[wf_opt=])
 485 ACX_PROG_CXX_WARNING_OPTS(
 486         m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings ],
 487                        [-Wcast-qual $wf_opt])), [loose_warn])
 488 ACX_PROG_CC_WARNING_OPTS(
 489         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
 490         [c_loose_warn])
 491 ACX_PROG_CXX_WARNING_OPTS(
 492         m4_quote(m4_do([-Wmissing-format-attribute ],
 493                        [-Woverloaded-virtual])), [strict_warn])
 494 ACX_PROG_CC_WARNING_OPTS(
 495         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 496 ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC(
 497         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 498                        [-Wno-overlength-strings])), [strict_warn])
 499 ACX_PROG_CXX_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 500
 501 # The above macros do nothing if the compiler is not GCC.  However, the
 502 # Makefile has more goo to add other flags, so these variables are used
 503 # to enable warnings only for GCC.
 504 warn_cflags=
 505 warn_cxxflags=
 506 if test "x$GCC" = "xyes"; then
 507   warn_cflags='$(GCC_WARN_CFLAGS)'
 508   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 509 fi
 510 AC_SUBST(warn_cflags)
 511 AC_SUBST(warn_cxxflags)
 512
 513 # Disable exceptions and RTTI if building with g++
 514 ACX_PROG_CC_WARNING_OPTS(
 515         m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
 516                        [noexception_flags])
 517
 518 # Enable expensive internal checks
 519 is_release=
 520 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 521   is_release=yes
 522 fi
 523
 524 AC_ARG_ENABLE(checking,
 525 [AS_HELP_STRING([[--enable-checking[=LIST]]],
 526                 [enable expensive run-time checks.  With LIST,
 527                  enable only specific categories of checks.
 528                  Categories are: yes,no,all,none,release.
 529                  Flags are: assert,df,extra,fold,gc,gcac,gimple,misc,
 530                  rtlflag,rtl,runtime,tree,valgrind,types])],
 531 [ac_checking_flags="${enableval}"],[
 532 # Determine the default checks.
 533 if test x$is_release = x ; then
 534   ac_checking_flags=yes,extra
 535 else
 536   ac_checking_flags=release
 537 fi])
 538 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 539 for check in release $ac_checking_flags
 540 do
 541         case $check in
 542         # these set all the flags to specific states
 543         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 544                         ac_fold_checking= ; ac_gc_checking=1 ; ac_extra_checking= ;
 545                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 546                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 547                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 548                         ac_types_checking=1 ;;
 549         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 550                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 551                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 552                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 553                         ac_tree_checking= ; ac_valgrind_checking= ;
 554                         ac_types_checking= ;;
 555         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 556                         ac_fold_checking=1 ; ac_gc_checking=1 ; ac_extra_checking=1 ;
 557                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 558                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 559                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 560                         ac_types_checking=1 ;;
 561         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 562                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 563                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 564                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 565                         ac_tree_checking= ; ac_valgrind_checking= ;
 566                         ac_types_checking= ;;
 567         # these enable particular checks
 568         assert)         ac_assert_checking=1 ;;
 569         df)             ac_df_checking=1 ;;
 570         extra)          ac_extra_checking=1 ;;
 571         fold)           ac_fold_checking=1 ;;
 572         gc)             ac_gc_checking=1 ;;
 573         gcac)           ac_gc_always_collect=1 ;;
 574         gimple)         ac_gimple_checking=1 ;;
 575         misc)           ac_checking=1 ;;
 576         rtl)            ac_rtl_checking=1 ;;
 577         rtlflag)        ac_rtlflag_checking=1 ;;
 578         runtime)        ac_runtime_checking=1 ;;
 579         tree)           ac_tree_checking=1 ;;
 580         types)          ac_types_checking=1 ;;
 581         valgrind)       ac_valgrind_checking=1 ;;
 582         *)      AC_MSG_ERROR(unknown check category $check) ;;
 583         esac
 584 done
 585 IFS="$ac_save_IFS"
 586
 587 nocommon_flag=""
 588 if test x$ac_checking != x ; then
 589   AC_DEFINE(CHECKING_P, 1,
 590 [Define to 0/1 if you want more run-time sanity checks.  This one gets a grab
 591 bag of miscellaneous but relatively cheap checks.])
 592   nocommon_flag=-fno-common
 593 else
 594   AC_DEFINE(CHECKING_P, 0)
 595 fi
 596 AC_SUBST(nocommon_flag)
 597 if test x$ac_extra_checking != x ; then
 598   AC_DEFINE(ENABLE_EXTRA_CHECKING, 1,
 599 [Define to 0/1 if you want extra run-time checking that might affect code
 600 generation.])
 601 else
 602   AC_DEFINE(ENABLE_EXTRA_CHECKING, 0)
 603 fi
 604 if test x$ac_df_checking != x ; then
 605   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 606 [Define if you want more run-time sanity checks for dataflow.])
 607 fi
 608 if test x$ac_assert_checking != x ; then
 609   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 610 [Define if you want assertions enabled.  This is a cheap check.])
 611 fi
 612 if test x$ac_gimple_checking != x ; then
 613   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 614 [Define if you want operations on GIMPLE (the basic data structure of
 615 the high-level optimizers) to be checked for dynamic type safety at
 616 runtime.  This is moderately expensive.])
 617 fi
 618 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 619 if test x$ac_runtime_checking != x ; then
 620   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 621 [Define if you want runtime assertions enabled.  This is a cheap check.])
 622 fi
 623 if test x$ac_tree_checking != x ; then
 624   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 625 [Define if you want all operations on trees (the basic data
 626    structure of the front ends) to be checked for dynamic type safety
 627    at runtime.  This is moderately expensive.
 628    ])
 629   TREECHECKING=yes
 630 fi
 631 if test x$ac_types_checking != x ; then
 632   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 633 [Define if you want all gimple types to be verified after gimplifiation.
 634    This is cheap.
 635    ])
 636 fi
 637 AC_SUBST(TREECHECKING)
 638 if test x$ac_rtl_checking != x ; then
 639   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 640 [Define if you want all operations on RTL (the basic data structure
 641    of the optimizer and back end) to be checked for dynamic type safety
 642    at runtime.  This is quite expensive.])
 643 fi
 644 if test x$ac_rtlflag_checking != x ; then
 645   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 646 [Define if you want RTL flag accesses to be checked against the RTL
 647    codes that are supported for each access macro.  This is relatively
 648    cheap.])
 649 fi
 650 if test x$ac_gc_checking != x ; then
 651   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 652 [Define if you want the garbage collector to do object poisoning and
 653    other memory allocation checks.  This is quite expensive.])
 654 fi
 655 if test x$ac_gc_always_collect != x ; then
 656   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 657 [Define if you want the garbage collector to operate in maximally
 658    paranoid mode, validating the entire heap and collecting garbage at
 659    every opportunity.  This is extremely expensive.])
 660 fi
 661 if test x$ac_fold_checking != x ; then
 662   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 663 [Define if you want fold checked that it never destructs its argument.
 664    This is quite expensive.])
 665 fi
 666 valgrind_path_defines=
 667 valgrind_command=
 668
 669 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 670 dnl # an if statement.  This was the source of very frustrating bugs
 671 dnl # in converting to autoconf 2.5x!
 672 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 673
 674 # It is certainly possible that there's valgrind but no valgrind.h.
 675 # GCC relies on making annotations so we must have both.
 676 AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 677 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 678   [[#include <valgrind/memcheck.h>
 679 #ifndef VALGRIND_DISCARD
 680 #error VALGRIND_DISCARD not defined
 681 #endif]])],
 682   [gcc_cv_header_valgrind_memcheck_h=yes],
 683   [gcc_cv_header_valgrind_memcheck_h=no])
 684 AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 685 AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 686 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 687   [[#include <memcheck.h>
 688 #ifndef VALGRIND_DISCARD
 689 #error VALGRIND_DISCARD not defined
 690 #endif]])],
 691   [gcc_cv_header_memcheck_h=yes],
 692   [gcc_cv_header_memcheck_h=no])
 693 AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 694 if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 695   AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 696         [Define if valgrind's valgrind/memcheck.h header is installed.])
 697 fi
 698 if test $gcc_cv_header_memcheck_h = yes; then
 699   AC_DEFINE(HAVE_MEMCHECK_H, 1,
 700         [Define if valgrind's memcheck.h header is installed.])
 701 fi
 702
 703 if test x$ac_valgrind_checking != x ; then
 704   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 705         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 706   if test "x$valgrind_path" = "x" \
 707     || (test $have_valgrind_h = no \
 708         && test $gcc_cv_header_memcheck_h = no \
 709         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 710         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 711   fi
 712   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 713   valgrind_command="$valgrind_path -q"
 714   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 715 [Define if you want to run subprograms and generated programs
 716    through valgrind (a memory checker).  This is extremely expensive.])
 717 fi
 718 AC_SUBST(valgrind_path_defines)
 719 AC_SUBST(valgrind_command)
 720
 721 # Enable code coverage collection
 722 AC_ARG_ENABLE(coverage,
 723 [AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
 724                 [enable compiler's code coverage collection.
 725                  Use to measure compiler performance and locate
 726                  unused parts of the compiler. With LEVEL, specify
 727                  optimization. Values are opt, noopt,
 728                  default is noopt])],
 729 [case "${enableval}" in
 730   yes|noopt)
 731     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
 732     ;;
 733   opt)
 734     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
 735     ;;
 736   no)
 737     # a.k.a. --disable-coverage
 738     coverage_flags=""
 739     ;;
 740   *)
 741     AC_MSG_ERROR(unknown coverage setting $enableval)
 742     ;;
 743 esac],
 744 [coverage_flags=""])
 745 AC_SUBST(coverage_flags)
 746
 747 AC_ARG_ENABLE(gather-detailed-mem-stats,
 748 [AS_HELP_STRING([--enable-gather-detailed-mem-stats],
 749                 [enable detailed memory allocation stats gathering])], [],
 750 [enable_gather_detailed_mem_stats=no])
 751 gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
 752 AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
 753 [Define to enable detailed memory allocation stats gathering.])
 754
 755 AC_ARG_ENABLE(valgrind-annotations,
 756 [AS_HELP_STRING([--enable-valgrind-annotations],
 757                 [enable valgrind runtime interaction])], [],
 758 [enable_valgrind_annotations=no])
 759 if test x$enable_valgrind_annotations != xno \
 760     || test x$ac_valgrind_checking != x; then
 761   if (test $have_valgrind_h = no \
 762       && test $gcc_cv_header_memcheck_h = no \
 763       && test $gcc_cv_header_valgrind_memcheck_h = no); then
 764     AC_MSG_ERROR([*** Can't find valgrind/memcheck.h, memcheck.h or valgrind.h])
 765   fi
 766   AC_DEFINE(ENABLE_VALGRIND_ANNOTATIONS, 1,
 767 [Define to get calls to the valgrind runtime enabled.])
 768 fi
 769
 770 # -------------------------------
 771 # Miscenalleous configure options
 772 # -------------------------------
 773
 774 # With stabs
 775 AC_ARG_WITH(stabs,
 776 [AS_HELP_STRING([--with-stabs],
 777                 [arrange to use stabs instead of host debug format])],
 778 stabs="$with_stabs",
 779 stabs=no)
 780
 781 # Determine whether or not multilibs are enabled.
 782 AC_ARG_ENABLE(multilib,
 783 [AS_HELP_STRING([--enable-multilib],
 784                 [enable library support for multiple ABIs])],
 785 [], [enable_multilib=yes])
 786 AC_SUBST(enable_multilib)
 787
 788 # Determine whether or not multiarch is enabled.
 789 AC_ARG_ENABLE(multiarch,
 790 [AS_HELP_STRING([--enable-multiarch],
 791                 [enable support for multiarch paths])],
 792 [case "${enableval}" in
 793 yes|no|auto) enable_multiarch=$enableval;;
 794 *) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
 795 esac], [enable_multiarch=auto])
 796 if test x${enable_multiarch} = xauto; then
 797   if test x${with_native_system_header_dir} != x; then
 798     ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
 799     enable_multiarch=no
 800   fi
 801   if test x$host != x$target && test "x$with_sysroot" = x; then
 802     ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
 803     enable_multiarch=no
 804   fi
 805 fi
 806 AC_MSG_CHECKING(for multiarch configuration)
 807 AC_SUBST(enable_multiarch)
 808 AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
 809
 810 # needed for setting the multiarch name for soft-float/hard-float ABIs
 811 AC_SUBST(with_cpu)
 812 AC_SUBST(with_float)
 813
 814 # Enable __cxa_atexit for C++.
 815 AC_ARG_ENABLE(__cxa_atexit,
 816 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
 817 [], [])
 818
 819 # Enable C extension for decimal float if target supports it.
 820 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
 821
 822 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 823 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 824 [Define to 1 to enable decimal float extension to C.])
 825
 826 # Use default_decimal_float for dependency.
 827 enable_decimal_float=$default_decimal_float
 828
 829 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 830 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 831 [Define to 1 to specify that we are using the BID decimal floating
 832 point format instead of DPD])
 833
 834 # Enable C extension for fixed-point arithmetic.
 835 AC_ARG_ENABLE(fixed-point,
 836 [AS_HELP_STRING([--enable-fixed-point],
 837                 [enable fixed-point arithmetic extension to C])],
 838 [],
 839 [
 840   case $target in
 841     arm*)
 842       enable_fixed_point=yes
 843       ;;
 844
 845     mips*-*-*)
 846       enable_fixed_point=yes
 847       ;;
 848     *)
 849       AC_MSG_WARN([fixed-point is not supported for this target, ignored])
 850       enable_fixed_point=no
 851       ;;
 852   esac
 853 ])
 854 AC_SUBST(enable_fixed_point)
 855
 856 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 857 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 858 [Define to 1 to enable fixed-point arithmetic extension to C.])
 859
 860 # Enable threads
 861 # Pass with no value to take the default
 862 # Pass with a value to specify a thread package
 863 AC_ARG_ENABLE(threads,
 864 [AS_HELP_STRING([[--enable-threads[=LIB]]],
 865                 [enable thread usage for target GCC,
 866                  using LIB thread package])],,
 867 [enable_threads=''])
 868
 869 AC_ARG_ENABLE(tls,
 870 [AS_HELP_STRING([--enable-tls],
 871                 [enable or disable generation of tls code
 872                  overriding the assembler check for tls support])],
 873 [
 874   case $enable_tls in
 875     yes | no) ;;
 876     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 877 Valid choices are 'yes' and 'no'.]) ;;
 878   esac
 879 ], [enable_tls=''])
 880
 881 AC_ARG_ENABLE(vtable-verify,
 882 [AS_HELP_STRING([--enable-vtable-verify],
 883                 [enable vtable verification feature])],,
 884 [enable_vtable_verify=no])
 885 vtable_verify=`if test x$enable_vtable_verify = xyes; then echo 1; else echo 0; fi`
 886 AC_DEFINE_UNQUOTED(ENABLE_VTABLE_VERIFY, $vtable_verify,
 887 [Define 0/1 if vtable verification feature is enabled.])
 888
 889 AC_ARG_ENABLE(objc-gc,
 890 [AS_HELP_STRING([--enable-objc-gc],
 891                 [enable the use of Boehm's garbage collector with
 892                  the GNU Objective-C runtime])],
 893 if test x$enable_objc_gc = xno; then
 894         objc_boehm_gc=''
 895 else
 896         objc_boehm_gc=1
 897 fi,
 898 objc_boehm_gc='')
 899
 900 AC_ARG_WITH(dwarf2,
 901 [AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
 902 dwarf2="$with_dwarf2",
 903 dwarf2=no)
 904
 905 AC_ARG_ENABLE(shared,
 906 [AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
 907 [
 908   case $enable_shared in
 909   yes | no) ;;
 910   *)
 911     enable_shared=no
 912     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 913     for pkg in $enableval; do
 914       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 915         enable_shared=yes
 916       fi
 917     done
 918     IFS="$ac_save_ifs"
 919     ;;
 920   esac
 921 ], [enable_shared=yes])
 922 AC_SUBST(enable_shared)
 923
 924 AC_ARG_WITH(specs,
 925   [AS_HELP_STRING([--with-specs=SPECS],
 926                   [add SPECS to driver command-line processing])],
 927   [CONFIGURE_SPECS=$withval],
 928   [CONFIGURE_SPECS=]
 929 )
 930 AC_SUBST(CONFIGURE_SPECS)
 931
 932 ACX_PKGVERSION([GCC])
 933 ACX_BUGURL([https://gcc.gnu.org/bugs/])
 934
 935 # Sanity check enable_languages in case someone does not run the toplevel
 936 # configure # script.
 937 AC_ARG_ENABLE(languages,
 938 [AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
 939 [case ,${enable_languages}, in
 940        ,,|,yes,)
 941                 # go safe -- we cannot be much sure without the toplevel
 942                 # configure's
 943                 # analysis of which target libs are present and usable
 944                 enable_languages=c
 945                 ;;
 946          *,all,*)
 947                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 948                 ;;
 949         *,c,*)
 950                 ;;
 951         *)
 952                 enable_languages=c,${enable_languages}
 953                 ;;
 954 esac],
 955 [enable_languages=c])
 956
 957 if test x"$enable_as_accelerator_for" != x; then
 958   AC_DEFINE(ACCEL_COMPILER, 1,
 959     [Define if this compiler should be built as the offload target compiler.])
 960   enable_as_accelerator=yes
 961   case "${target}" in
 962     *-intelmicemul-*)
 963       # In this case we expect offload compiler to be built as native, so we
 964       # need to rename the driver to avoid clashes with host's drivers.
 965       program_transform_name="s&^&${target}-&" ;;
 966   esac
 967   sedscript="s#${target_noncanonical}#${enable_as_accelerator_for}-accel-${target_noncanonical}#"
 968   program_transform_name=`echo $program_transform_name | sed $sedscript`
 969   accel_dir_suffix=/accel/${target_noncanonical}
 970   real_target_noncanonical=${enable_as_accelerator_for}
 971 fi
 972 AC_SUBST(enable_as_accelerator)
 973 AC_SUBST(real_target_noncanonical)
 974 AC_SUBST(accel_dir_suffix)
 975
 976 for tgt in `echo $enable_offload_targets | sed 's/,/ /g'`; do
 977   tgt=`echo $tgt | sed 's/=.*//'`
 978
 979   if echo "$tgt" | grep "^hsa" > /dev/null ; then
 980     enable_hsa=1
 981   else
 982     enable_offloading=1
 983   fi
 984
 985   if test x"$offload_targets" = x; then
 986     offload_targets=$tgt
 987   else
 988     offload_targets="$offload_targets,$tgt"
 989   fi
 990 done
 991 AC_DEFINE_UNQUOTED(OFFLOAD_TARGETS, "$offload_targets",
 992   [Define to offload targets, separated by commas.])
 993 if test x"$enable_offloading" != x; then
 994   AC_DEFINE(ENABLE_OFFLOADING, 1,
 995     [Define this to enable support for offloading.])
 996 else
 997   AC_DEFINE(ENABLE_OFFLOADING, 0,
 998     [Define this to enable support for offloading.])
 999 fi
1000
1001 if test x"$enable_hsa" = x1 ; then
1002   AC_DEFINE(ENABLE_HSA, 1,
1003     [Define this to enable support for generating HSAIL.])
1004 fi
1005
1006 AC_ARG_WITH(multilib-list,
1007 [AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, SH and x86-64 only)])],
1008 :,
1009 with_multilib_list=default)
1010
1011 # -------------------------
1012 # Checks for other programs
1013 # -------------------------
1014
1015 AC_PROG_MAKE_SET
1016
1017 # Find some useful tools
1018 AC_PROG_AWK
1019 # We need awk to create options.c and options.h.
1020 # Bail out if it's missing.
1021 case ${AWK} in
1022   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
1023 esac
1024
1025 gcc_AC_PROG_LN_S
1026 ACX_PROG_LN($LN_S)
1027 AC_PROG_RANLIB
1028 ranlib_flags=""
1029 AC_SUBST(ranlib_flags)
1030
1031 gcc_AC_PROG_INSTALL
1032
1033 # See if cmp has --ignore-initial.
1034 gcc_AC_PROG_CMP_IGNORE_INITIAL
1035
1036 # See if we have the mktemp command.
1037 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
1038
1039 # See if makeinfo has been installed and is modern enough
1040 # that we can use it.
1041 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
1042   [GNU texinfo.* \([0-9][0-9.]*\)],
1043   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
1044 if test $gcc_cv_prog_makeinfo_modern = no; then
1045   AC_MSG_WARN([
1046 *** Makeinfo is missing or too old.
1047 *** Info documentation will not be built.])
1048   BUILD_INFO=
1049 else
1050   BUILD_INFO=info
1051 fi
1052 AC_SUBST(BUILD_INFO)
1053
1054 # Is pod2man recent enough to regenerate manpages?
1055 AC_MSG_CHECKING([for recent Pod::Man])
1056 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
1057   AC_MSG_RESULT(yes)
1058   GENERATED_MANPAGES=generated-manpages
1059 else
1060   AC_MSG_RESULT(no)
1061   GENERATED_MANPAGES=
1062 fi
1063 AC_SUBST(GENERATED_MANPAGES)
1064
1065 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
1066
1067 # How about lex?
1068 dnl Don't use AC_PROG_LEX; we insist on flex.
1069 dnl LEXLIB is not useful in gcc.
1070 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
1071
1072 # Bison?
1073 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
1074
1075 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
1076 # check for build == host before using them.
1077
1078 # NM
1079 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
1080   && test -d ../binutils ; then
1081   NM='${objdir}/../binutils/nm-new'
1082 else
1083   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
1084 fi
1085
1086 # AR
1087 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
1088   && test -d ../binutils ; then
1089   AR='${objdir}/../binutils/ar'
1090 else
1091   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
1092 fi
1093
1094 # The jit documentation looks better if built with sphinx, but can be
1095 # built with texinfo if sphinx is not available.
1096 # Set "doc_build_sys" to "sphinx" or "texinfo" accordingly.
1097 AC_CHECK_PROG(doc_build_sys, sphinx-build, sphinx, texinfo)
1098
1099 # --------------------
1100 # Checks for C headers
1101 # --------------------
1102
1103 # Need to reject headers which give warnings, so that the -Werror bootstrap
1104 # works later. *sigh*  This needs to come before all header checks.
1105 AC_PROG_CPP_WERROR
1106
1107 AC_HEADER_STDC
1108 AC_HEADER_TIME
1109 ACX_HEADER_STRING
1110 AC_HEADER_SYS_WAIT
1111 AC_HEADER_TIOCGWINSZ
1112 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
1113                  fcntl.h ftw.h unistd.h sys/file.h sys/time.h sys/mman.h \
1114                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
1115                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
1116
1117 # Check for thread headers.
1118 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
1119 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
1120
1121 # These tests can't be done till we know if we have limits.h.
1122 gcc_AC_C_CHAR_BIT
1123 AC_C_BIGENDIAN
1124
1125 # ----------------------
1126 # Checks for C++ headers
1127 # ----------------------
1128
1129 dnl Autoconf will give an error in the configure script if there is no
1130 dnl C++ preprocessor.  Hack to prevent that.
1131 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
1132 AC_PROG_CXXCPP
1133 m4_popdef([AC_MSG_ERROR])[]dnl
1134
1135 AC_CHECK_HEADERS(unordered_map)
1136 AC_CHECK_HEADERS(tr1/unordered_map)
1137 AC_CHECK_HEADERS(ext/hash_map)
1138
1139 # --------
1140 # Dependency checking.
1141 # --------
1142
1143 ZW_CREATE_DEPDIR
1144 AC_CONFIG_COMMANDS([gccdepdir],[
1145   ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs build/$DEPDIR
1146   for lang in $subdirs c-family common
1147   do
1148       ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
1149   done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
1150
1151 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
1152
1153 # --------
1154 # UNSORTED
1155 # --------
1156
1157
1158 # These libraries may be used by collect2.
1159 # We may need a special search path to get them linked.
1160 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
1161 [save_LIBS="$LIBS"
1162 for libs in '' -lld -lmld \
1163                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
1164                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
1165 do
1166         LIBS="$libs"
1167         AC_TRY_LINK_FUNC(ldopen,
1168                 [gcc_cv_collect2_libs="$libs"; break])
1169 done
1170 LIBS="$save_LIBS"
1171 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
1172 case $gcc_cv_collect2_libs in
1173         "none required")        ;;
1174         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
1175 esac
1176 AC_SUBST(COLLECT2_LIBS)
1177
1178 # When building Ada code on Alpha, we need exc_resume which is usually in
1179 # -lexc.  So test for it.
1180 save_LIBS="$LIBS"
1181 LIBS=
1182 AC_SEARCH_LIBS(exc_resume, exc)
1183 GNAT_LIBEXC="$LIBS"
1184 LIBS="$save_LIBS"
1185 AC_SUBST(GNAT_LIBEXC)
1186
1187 # To support -mcpu=native on Solaris/SPARC, we need libkstat.
1188 save_LIBS="$LIBS"
1189 LIBS=
1190 AC_SEARCH_LIBS(kstat_open, kstat)
1191 EXTRA_GCC_LIBS="$LIBS"
1192 LIBS="$save_LIBS"
1193 AC_SUBST(EXTRA_GCC_LIBS)
1194
1195 # Some systems put ldexp and frexp in libm instead of libc; assume
1196 # they're both in the same place.  jcf-dump needs them.
1197 save_LIBS="$LIBS"
1198 LIBS=
1199 AC_SEARCH_LIBS(ldexp, m)
1200 LDEXP_LIB="$LIBS"
1201 LIBS="$save_LIBS"
1202 AC_SUBST(LDEXP_LIB)
1203
1204 # Use <inttypes.h> only if it exists,
1205 # doesn't clash with <sys/types.h>, declares intmax_t and defines
1206 # PRId64
1207 AC_MSG_CHECKING(for inttypes.h)
1208 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1209 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1210 [[#define __STDC_FORMAT_MACROS
1211 #include <sys/types.h>
1212 #include <inttypes.h>]],
1213   [[intmax_t i = -1;
1214 #ifndef PRId64
1215 choke me
1216 #endif]])],
1217   [gcc_cv_header_inttypes_h=yes],
1218   [gcc_cv_header_inttypes_h=no])])
1219 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1220 if test $gcc_cv_header_inttypes_h = yes; then
1221   AC_DEFINE(HAVE_INTTYPES_H, 1,
1222         [Define if you have a working <inttypes.h> header file.])
1223 fi
1224
1225 dnl Disabled until we have a complete test for buggy enum bitfields.
1226 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1227
1228 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1229   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1230   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1231   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1232   putchar_unlocked putc_unlocked)
1233 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoq \
1234         popen sysconf strsignal getrusage nl_langinfo \
1235         gettimeofday mbstowcs wcswidth mmap setlocale \
1236         gcc_UNLOCKED_FUNCS madvise)
1237
1238 if test x$ac_cv_func_mbstowcs = xyes; then
1239   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1240 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1241 int main()
1242 {
1243   mbstowcs(0, "", 0);
1244   return 0;
1245 }]])],
1246     [gcc_cv_func_mbstowcs_works=yes],
1247     [gcc_cv_func_mbstowcs_works=no],
1248     [gcc_cv_func_mbstowcs_works=yes])])
1249   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1250     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1251   [Define this macro if mbstowcs does not crash when its
1252    first argument is NULL.])
1253   fi
1254 fi
1255
1256 AC_CHECK_TYPE(ssize_t, int)
1257 AC_CHECK_TYPE(caddr_t, char *)
1258
1259 GCC_AC_FUNC_MMAP_BLACKLIST
1260
1261 case "${host}" in
1262 *-*-*vms*)
1263   # Under VMS, vfork works very differently than on Unix. The standard test
1264   # won't work, and it isn't easily adaptable. It makes more sense to
1265   # just force it.
1266   ac_cv_func_vfork_works=yes
1267   ;;
1268 esac
1269 AC_FUNC_FORK
1270
1271 AM_ICONV
1272
1273 # Until we have in-tree GNU iconv:
1274 LIBICONV_DEP=
1275 if test -f "$LTLIBICONV"; then
1276   LIBICONV_DEP=$LTLIBICONV
1277 fi
1278 AC_SUBST(LIBICONV_DEP)
1279
1280 AM_LC_MESSAGES
1281
1282 AM_LANGINFO_CODESET
1283
1284 # We will need to find libiberty.h and ansidecl.h
1285 saved_CFLAGS="$CFLAGS"
1286 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1287 saved_CXXFLAGS="$CXXFLAGS"
1288 CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1289
1290 # gcc_AC_CHECK_DECLS doesn't support overloaded functions, so use the
1291 # normal autoconf function for these.  But force definition of
1292 # HAVE_DECL_BASENAME like gcc_AC_CHECK_DECLS does, to suppress the bizarre
1293 # basename handling in libiberty.h.
1294 AC_CHECK_DECLS([basename(const char*), strstr(const char*,const char*)], , ,[
1295 #undef HAVE_DECL_BASENAME
1296 #define HAVE_DECL_BASENAME 1
1297 #include "ansidecl.h"
1298 #include "system.h"])
1299
1300 gcc_AC_CHECK_DECLS(getenv atol atoll asprintf sbrk abort atof getcwd getwd \
1301         madvise stpcpy strnlen strsignal strverscmp \
1302         strtol strtoul strtoll strtoull setenv unsetenv \
1303         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1304         free getopt clock getpagesize ffs gcc_UNLOCKED_FUNCS, , ,[
1305 #include "ansidecl.h"
1306 #include "system.h"])
1307
1308 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1309 #include "ansidecl.h"
1310 #include "system.h"
1311 #ifdef HAVE_SYS_RESOURCE_H
1312 #include <sys/resource.h>
1313 #endif
1314 ])
1315
1316 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1317 #include "ansidecl.h"
1318 #include "system.h"
1319 #ifdef HAVE_SYS_RESOURCE_H
1320 #include <sys/resource.h>
1321 #endif
1322 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1323 [Define to `long' if <sys/resource.h> doesn't define.])])
1324
1325 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1326 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1327 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1328 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1329 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1330 #include "ansidecl.h"
1331 #include "system.h"
1332 #ifdef HAVE_LDFCN_H
1333 #undef FREAD
1334 #undef FWRITE
1335 #include <ldfcn.h>
1336 #endif
1337 ])
1338
1339 gcc_AC_CHECK_DECLS(times, , ,[
1340 #include "ansidecl.h"
1341 #include "system.h"
1342 #ifdef HAVE_SYS_TIMES_H
1343 #include <sys/times.h>
1344 #endif
1345 ])
1346
1347 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1348 #include "ansidecl.h"
1349 #include "system.h"
1350 #include <signal.h>
1351 ])
1352
1353 # More time-related stuff.
1354 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1355 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1356 #include "ansidecl.h"
1357 #include "system.h"
1358 #ifdef HAVE_SYS_TIMES_H
1359 #include <sys/times.h>
1360 #endif
1361 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1362 if test $ac_cv_struct_tms = yes; then
1363   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1364   [Define if <sys/times.h> defines struct tms.])
1365 fi
1366
1367 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1368 # revisit after autoconf 2.50.
1369 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1370 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1371 #include "ansidecl.h"
1372 #include "system.h"
1373 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1374 if test $gcc_cv_type_clock_t = yes; then
1375   AC_DEFINE(HAVE_CLOCK_T, 1,
1376   [Define if <time.h> defines clock_t.])
1377 fi
1378
1379 # Check if F_SETLKW is supported by fcntl.
1380 AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
1381 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1382 #include <fcntl.h>]], [[
1383 struct flock fl;
1384 fl.l_whence = 0;
1385 fl.l_start = 0;
1386 fl.l_len = 0;
1387 fl.l_pid = 0;
1388 return fcntl (1, F_SETLKW, &fl);]])],
1389 [ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
1390 if test $ac_cv_f_setlkw = yes; then
1391   AC_DEFINE(HOST_HAS_F_SETLKW, 1,
1392   [Define if F_SETLKW supported by fcntl.])
1393 fi
1394
1395 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1396 CFLAGS="$saved_CFLAGS"
1397 CXXFLAGS="$saved_CXXFLAGS"
1398
1399 # mkdir takes a single argument on some systems.
1400 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1401
1402 # File extensions
1403 manext='.1'
1404 objext='.o'
1405 AC_SUBST(manext)
1406 AC_SUBST(objext)
1407
1408 # With Setjmp/Longjmp based exception handling.
1409 AC_ARG_ENABLE(sjlj-exceptions,
1410 [AS_HELP_STRING([--enable-sjlj-exceptions],
1411                 [arrange to use setjmp/longjmp exception handling])],
1412 [case $target in
1413   *-*-hpux10*)
1414     if test $enableval != yes; then
1415       AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1416       enableval=yes
1417     fi
1418     ;;
1419 esac
1420 force_sjlj_exceptions=yes],
1421 [case $target in
1422   *-*-hpux10*)
1423     force_sjlj_exceptions=yes
1424     enableval=yes
1425     ;;
1426   lm32*-*-*)
1427      force_sjlj_exceptions=yes
1428      enableval=yes
1429      ;;
1430   *)
1431     force_sjlj_exceptions=no
1432     ;;
1433 esac])
1434 if test $force_sjlj_exceptions = yes; then
1435   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1436   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1437     [Define 0/1 to force the choice for exception handling model.])
1438 fi
1439
1440 # --------------------------------------------------------
1441 # Build, host, and target specific configuration fragments
1442 # --------------------------------------------------------
1443
1444 # Collect build-machine-specific information.
1445 . ${srcdir}/config.build
1446
1447 # Collect host-machine-specific information.
1448 . ${srcdir}/config.host
1449
1450 target_gtfiles=
1451
1452 # Collect target-machine-specific information.
1453 . ${srcdir}/config.gcc
1454
1455 extra_objs="${host_extra_objs} ${extra_objs}"
1456 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1457
1458 # Default the target-machine variables that were not explicitly set.
1459 if test x"$tm_file" = x
1460 then tm_file=$cpu_type/$cpu_type.h; fi
1461
1462 if test x"$extra_headers" = x
1463 then extra_headers=; fi
1464
1465 if test x$md_file = x
1466 then md_file=$cpu_type/$cpu_type.md; fi
1467
1468 if test x$out_file = x
1469 then out_file=$cpu_type/$cpu_type.c; fi
1470
1471 if test x"$tmake_file" = x
1472 then tmake_file=$cpu_type/t-$cpu_type
1473 fi
1474
1475 # Support --enable-initfini-array.
1476 if test x$enable_initfini_array != xno; then
1477   tm_file="${tm_file} initfini-array.h"
1478 fi
1479
1480 if test x"$dwarf2" = xyes
1481 then tm_file="$tm_file tm-dwarf2.h"
1482 fi
1483
1484 # Say what files are being used for the output code and MD file.
1485 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1486 echo "Using \`$srcdir/config/$md_file' as machine description file."
1487
1488 # If any of the xm_file variables contain nonexistent files, warn
1489 # about them and drop them.
1490
1491 bx=
1492 for x in $build_xm_file; do
1493   if    test -f $srcdir/config/$x
1494   then      bx="$bx $x"
1495   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1496   fi
1497 done
1498 build_xm_file="$bx"
1499
1500 hx=
1501 for x in $host_xm_file; do
1502   if    test -f $srcdir/config/$x
1503   then      hx="$hx $x"
1504   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1505   fi
1506 done
1507 host_xm_file="$hx"
1508
1509 tx=
1510 for x in $xm_file; do
1511   if    test -f $srcdir/config/$x
1512   then      tx="$tx $x"
1513   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1514   fi
1515 done
1516 xm_file="$tx"
1517
1518 count=a
1519 for f in $tm_file; do
1520         count=${count}x
1521 done
1522 if test $count = ax; then
1523         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1524 else
1525         echo "Using the following target machine macro files:"
1526         for f in $tm_file; do
1527                 echo "  $srcdir/config/$f"
1528         done
1529 fi
1530
1531 if test x$use_long_long_for_widest_fast_int = xyes; then
1532         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1533 [Define to 1 if the 'long long' type is wider than 'long' but still
1534 efficiently supported by the host hardware.])
1535 fi
1536
1537 gnu_ld_bool=`if test x"$gnu_ld" = x"yes"; then echo 1; else echo 0; fi`
1538 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld_bool, [Define to 1 if using GNU ld.])
1539
1540 gnu_as_bool=`if test x"$gas" = x"yes"; then echo 1; else echo 0; fi`
1541 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as_bool, [Define to 1 if using GNU as.])
1542
1543 count=a
1544 for f in $host_xm_file; do
1545         count=${count}x
1546 done
1547 if test $count = a; then
1548         :
1549 elif test $count = ax; then
1550         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1551 else
1552         echo "Using the following host machine macro files:"
1553         for f in $host_xm_file; do
1554                 echo "  $srcdir/config/$f"
1555         done
1556 fi
1557 echo "Using ${out_host_hook_obj} for host machine hooks."
1558
1559 if test "$host_xm_file" != "$build_xm_file"; then
1560         count=a
1561         for f in $build_xm_file; do
1562                 count=${count}x
1563         done
1564         if test $count = a; then
1565                 :
1566         elif test $count = ax; then
1567                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1568         else
1569                 echo "Using the following build machine macro files:"
1570                 for f in $build_xm_file; do
1571                         echo "  $srcdir/config/$f"
1572                 done
1573         fi
1574 fi
1575
1576 if test -n "$configured_native_system_header_dir"; then
1577   native_system_header_dir=$configured_native_system_header_dir
1578 fi
1579 NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
1580 AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)
1581
1582 case ${host} in
1583   powerpc*-*-darwin*)
1584     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1585       gcc_cv_mcontext_underscores,
1586       AC_COMPILE_IFELSE([
1587 #include <sys/cdefs.h>
1588 #include <sys/signal.h>
1589 #include <ucontext.h>
1590 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1591 ],
1592         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1593       if test $gcc_cv_mcontext_underscores = yes; then
1594         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1595           [mcontext_t fields start with __])
1596       fi
1597     ;;
1598 esac
1599
1600 # ---------
1601 # Threading
1602 # ---------
1603
1604 # Check if a valid thread package
1605 case ${enable_threads} in
1606   "" | no)
1607     # No threads
1608     target_thread_file='single'
1609     ;;
1610   yes)
1611     # default
1612     target_thread_file='single'
1613     ;;
1614   aix | dce | lynx | mipssde | posix | rtems | \
1615   single | tpf | vxworks | win32)
1616     target_thread_file=${enable_threads}
1617     ;;
1618   *)
1619     echo "${enable_threads} is an unknown thread package" 1>&2
1620     exit 1
1621     ;;
1622 esac
1623
1624 if test x${thread_file} = x; then
1625   # No thread file set by target-specific clauses in config.gcc,
1626   # so use file chosen by default logic above
1627   thread_file=${target_thread_file}
1628 fi
1629
1630 # --------
1631 # UNSORTED
1632 # --------
1633
1634 use_cxa_atexit=no
1635 if test x$enable___cxa_atexit = xyes || \
1636    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1637   if test x$host = x$target; then
1638     case $host in
1639       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1640       # keyed to flag_use_cxa_atexit
1641       *-*-mingw32*)
1642         use_cxa_atexit=yes
1643         ;;
1644       powerpc-ibm-aix*)
1645         use_cxa_atexit=yes
1646         ;;
1647       *)
1648         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1649           [echo "__cxa_atexit can't be enabled on this target"])
1650         ;;
1651     esac
1652   else
1653     # We can't check for __cxa_atexit when building a cross, so assume
1654     # it is available
1655     use_cxa_atexit=yes
1656   fi
1657   if test x$use_cxa_atexit = xyes; then
1658     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1659       [Define if you want to use __cxa_atexit, rather than atexit, to
1660       register C++ destructors for local statics and global objects.
1661       This is essential for fully standards-compliant handling of
1662       destructors, but requires __cxa_atexit in libc.])
1663   fi
1664 fi
1665
1666 # Look for a file containing extra machine modes.
1667 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1668   extra_modes_file='$(srcdir)'/config/${extra_modes}
1669   AC_SUBST(extra_modes_file)
1670   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1671   [Define to the name of a file containing a list of extra machine modes
1672    for this architecture.])
1673 fi
1674
1675 # Convert extra_options into a form suitable for Makefile use.
1676 extra_opt_files=
1677 all_opt_files=
1678 for f in $extra_options; do
1679   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1680   all_opt_files="$all_opt_files $srcdir/config/$f"
1681 done
1682 AC_SUBST(extra_opt_files)
1683
1684 # auto-host.h is the file containing items generated by autoconf and is
1685 # the first file included by config.h.
1686 # If host=build, it is correct to have bconfig include auto-host.h
1687 # as well.  If host!=build, we are in error and need to do more
1688 # work to find out the build config parameters.
1689 if test x$host = x$build
1690 then
1691         build_auto=auto-host.h
1692 else
1693         # We create a subdir, then run autoconf in the subdir.
1694         # To prevent recursion we set host and build for the new
1695         # invocation of configure to the build for this invocation
1696         # of configure.
1697         tempdir=build.$$
1698         rm -rf $tempdir
1699         mkdir $tempdir
1700         cd $tempdir
1701         case ${srcdir} in
1702         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1703         *) realsrcdir=../${srcdir};;
1704         esac
1705         # Clearing GMPINC is necessary to prevent host headers being
1706         # used by the build compiler.  Defining GENERATOR_FILE stops
1707         # system.h from including gmp.h.
1708         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1709         CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
1710         LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1711         GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \
1712         ${realsrcdir}/configure \
1713                 --enable-languages=${enable_languages-all} \
1714                 --target=$target_alias --host=$build_alias --build=$build_alias
1715
1716         # We just finished tests for the build machine, so rename
1717         # the file auto-build.h in the gcc directory.
1718         mv auto-host.h ../auto-build.h
1719         cd ..
1720         rm -rf $tempdir
1721         build_auto=auto-build.h
1722 fi
1723 AC_SUBST(build_subdir)
1724
1725 tm_file="${tm_file} defaults.h"
1726 tm_p_file="${tm_p_file} tm-preds.h"
1727 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1728 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1729 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1730 # put this back in temporarily.
1731 xm_file="auto-host.h ansidecl.h ${xm_file}"
1732
1733 # --------
1734 # UNSORTED
1735 # --------
1736
1737 changequote(,)dnl
1738 # Compile in configure arguments.
1739 if test -f configargs.h ; then
1740         # Being re-configured.
1741         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1742         gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1743 else
1744         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1745 fi
1746
1747 # Double all backslashes and backslash all quotes to turn
1748 # gcc_config_arguments into a C string.
1749 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1750 $gcc_config_arguments
1751 EOF
1752 gcc_config_arguments_str=`cat conftest.out`
1753 rm -f conftest.out
1754
1755 cat > configargs.h <<EOF
1756 /* Generated automatically. */
1757 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1758 static const char thread_model[] = "$thread_file";
1759
1760 static const struct {
1761   const char *name, *value;
1762 } configure_default_options[] = $configure_default_options;
1763 EOF
1764 changequote([,])dnl
1765
1766 changequote(,)dnl
1767 gcc_BASEVER=`cat $srcdir/BASE-VER`
1768 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1769 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1770 if test -f $srcdir/REVISION ; then
1771         gcc_REVISION=`cat $srcdir/REVISION`
1772 else
1773         gcc_REVISION=""
1774 fi
1775 cat > plugin-version.h <<EOF
1776 #include "configargs.h"
1777
1778 #define GCCPLUGIN_VERSION_MAJOR   `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
1779 #define GCCPLUGIN_VERSION_MINOR   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
1780 #define GCCPLUGIN_VERSION_PATCHLEVEL   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
1781 #define GCCPLUGIN_VERSION  (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)
1782
1783 static char basever[] = "$gcc_BASEVER";
1784 static char datestamp[] = "$gcc_DATESTAMP";
1785 static char devphase[] = "$gcc_DEVPHASE";
1786 static char revision[] = "$gcc_REVISION";
1787
1788 /* FIXME plugins: We should make the version information more precise.
1789    One way to do is to add a checksum. */
1790
1791 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1792                                                 devphase, revision,
1793                                                 configuration_arguments};
1794 EOF
1795 changequote([,])dnl
1796
1797 # Determine what GCC version number to use in filesystem paths.
1798 GCC_BASE_VER
1799
1800 # Internationalization
1801 ZW_GNU_GETTEXT_SISTER_DIR
1802
1803 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1804 # -liconv on the link line twice.
1805 case "$LIBINTL" in *$LIBICONV*)
1806         LIBICONV= ;;
1807 esac
1808
1809 AC_ARG_ENABLE(secureplt,
1810 [AS_HELP_STRING([--enable-secureplt],
1811                 [enable -msecure-plt by default for PowerPC])],
1812 [], [])
1813
1814 AC_ARG_ENABLE(mingw-wildcard,
1815 [AS_HELP_STRING([--enable-mingw-wildcard],
1816                 [Set whether to expand wildcard on command-line.
1817                  Default to platform configuration])],
1818 [],[enable_mingw_wildcard=platform])
1819 AS_IF([test x"$enable_mingw_wildcard" != xplatform ],
1820       [AC_DEFINE_UNQUOTED(MINGW_DOWILDCARD,
1821                  $(test x"$enable_mingw_wildcard" = xno; echo $?),
1822                  [Value to set mingw's _dowildcard to.])])
1823
1824 AC_ARG_ENABLE(leading-mingw64-underscores,
1825   AS_HELP_STRING([--enable-leading-mingw64-underscores],
1826                  [enable leading underscores on 64 bit mingw targets]),
1827   [],[])
1828 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1829   [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1830     [Define if we should use leading underscore on 64 bit mingw targets])])
1831
1832 AC_ARG_ENABLE(cld,
1833 [AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
1834 [enable_cld=no])
1835
1836 AC_ARG_ENABLE(frame-pointer,
1837 [AS_HELP_STRING([--enable-frame-pointer],
1838                 [enable -fno-omit-frame-pointer by default for 32bit x86])], [],
1839 [
1840 case $target_os in
1841 linux* | darwin[[8912]]*)
1842   # Enable -fomit-frame-pointer by default for Linux and Darwin with
1843   # DWARF2.
1844   enable_frame_pointer=no
1845   ;;
1846 *)
1847   enable_frame_pointer=yes
1848   ;;
1849 esac
1850 ])
1851
1852 # Windows32 Registry support for specifying GCC installation paths.
1853 AC_ARG_ENABLE(win32-registry,
1854 [AS_HELP_STRING([--disable-win32-registry],
1855                 [disable lookup of installation paths in the
1856                  Registry on Windows hosts])
1857 AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
1858 AS_HELP_STRING([--enable-win32-registry=KEY],
1859                [use KEY instead of GCC version as the last portion
1860                 of the registry key])],,)
1861
1862 case $host_os in
1863   win32 | pe | cygwin* | mingw32*)
1864     if test "x$enable_win32_registry" != xno; then
1865       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1866     fi
1867
1868     if test "x$enable_win32_registry" != xno; then
1869       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1870   [Define to 1 if installation paths should be looked up in the Windows
1871    Registry. Ignored on non-Windows hosts.])
1872
1873       if test "x$enable_win32_registry" != xyes \
1874          && test "x$enable_win32_registry" != x; then
1875         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1876   [Define to be the last component of the Windows registry key under which
1877    to look for installation paths.  The full key used will be
1878    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1879    The default is the GCC version number.])
1880       fi
1881     fi
1882   ;;
1883 esac
1884
1885 # Get an absolute path to the GCC top-level source directory
1886 holddir=`${PWDCMD-pwd}`
1887 cd $srcdir
1888 topdir=`${PWDCMD-pwd}`
1889 cd $holddir
1890
1891 # Conditionalize the makefile for this host machine.
1892 xmake_file=
1893 for f in ${host_xmake_file}
1894 do
1895         if test -f ${srcdir}/config/$f
1896         then
1897                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1898         fi
1899 done
1900
1901 # Conditionalize the makefile for this target machine.
1902 tmake_file_=
1903 for f in ${tmake_file}
1904 do
1905         if test -f ${srcdir}/config/$f
1906         then
1907                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1908         fi
1909 done
1910 tmake_file="${tmake_file_}"
1911
1912 out_object_file=`basename $out_file .c`.o
1913 common_out_object_file=`basename $common_out_file .c`.o
1914
1915 tm_file_list="options.h"
1916 tm_include_list="options.h insn-constants.h"
1917 for f in $tm_file; do
1918   case $f in
1919     ./* )
1920        f=`echo $f | sed 's/^..//'`
1921        tm_file_list="${tm_file_list} $f"
1922        tm_include_list="${tm_include_list} $f"
1923        ;;
1924     defaults.h )
1925        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1926        tm_include_list="${tm_include_list} $f"
1927        ;;
1928     * )
1929        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1930        tm_include_list="${tm_include_list} config/$f"
1931        ;;
1932   esac
1933 done
1934
1935 tm_p_file_list=
1936 tm_p_include_list=
1937 for f in $tm_p_file; do
1938   case $f in
1939     tm-preds.h )
1940        tm_p_file_list="${tm_p_file_list} $f"
1941        tm_p_include_list="${tm_p_include_list} $f"
1942        ;;
1943     * )
1944        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1945        tm_p_include_list="${tm_p_include_list} config/$f"
1946   esac
1947 done
1948
1949 xm_file_list=
1950 xm_include_list=
1951 for f in $xm_file; do
1952   case $f in
1953     ansidecl.h )
1954        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1955        xm_include_list="${xm_include_list} $f"
1956        ;;
1957     auto-host.h )
1958        xm_file_list="${xm_file_list} $f"
1959        xm_include_list="${xm_include_list} $f"
1960        ;;
1961     * )
1962        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1963        xm_include_list="${xm_include_list} config/$f"
1964        ;;
1965   esac
1966 done
1967
1968 host_xm_file_list=
1969 host_xm_include_list=
1970 for f in $host_xm_file; do
1971   case $f in
1972     ansidecl.h )
1973        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1974        host_xm_include_list="${host_xm_include_list} $f"
1975        ;;
1976     auto-host.h )
1977        host_xm_file_list="${host_xm_file_list} $f"
1978        host_xm_include_list="${host_xm_include_list} $f"
1979        ;;
1980     * )
1981        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1982        host_xm_include_list="${host_xm_include_list} config/$f"
1983        ;;
1984   esac
1985 done
1986
1987 build_xm_file_list=
1988 for f in $build_xm_file; do
1989   case $f in
1990     ansidecl.h )
1991        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1992        build_xm_include_list="${build_xm_include_list} $f"
1993        ;;
1994     auto-build.h | auto-host.h )
1995        build_xm_file_list="${build_xm_file_list} $f"
1996        build_xm_include_list="${build_xm_include_list} $f"
1997        ;;
1998     * )
1999        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
2000        build_xm_include_list="${build_xm_include_list} config/$f"
2001        ;;
2002   esac
2003 done
2004
2005 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
2006 # cross-compiler which does not use the native headers and libraries.
2007 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
2008 CROSS=                                          AC_SUBST(CROSS)
2009 ALL=all.internal                                AC_SUBST(ALL)
2010 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
2011 BUILD_SYSTEM_HEADER_DIR=$SYSTEM_HEADER_DIR      AC_SUBST(BUILD_SYSTEM_HEADER_DIR)
2012
2013 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x ||
2014    test x$build != x$host || test "x$with_build_sysroot" != x; then
2015   if test "x$with_build_sysroot" != x; then
2016     BUILD_SYSTEM_HEADER_DIR=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
2017   else
2018     BUILD_SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2019   fi
2020
2021   if test x$host != x$target
2022   then
2023     CROSS="-DCROSS_DIRECTORY_STRUCTURE"
2024     ALL=all.cross
2025     SYSTEM_HEADER_DIR=$BUILD_SYSTEM_HEADER_DIR
2026   elif test "x$TARGET_SYSTEM_ROOT" != x; then
2027     SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2028   fi
2029
2030   if test "x$with_build_sysroot" != "x"; then
2031     target_header_dir="${with_build_sysroot}${native_system_header_dir}"
2032   elif test "x$with_sysroot" = x; then
2033     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-include"
2034   elif test "x$with_sysroot" = xyes; then
2035     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
2036   else
2037     target_header_dir="${with_sysroot}${native_system_header_dir}"
2038   fi
2039 else
2040   target_header_dir=${native_system_header_dir}
2041 fi
2042
2043 # If this is a cross-compiler that does not
2044 # have its own set of headers then define
2045 # inhibit_libc
2046
2047 # If this is using newlib, without having the headers available now,
2048 # then define inhibit_libc in LIBGCC2_CFLAGS.
2049 # This prevents libgcc2 from containing any code which requires libc
2050 # support.
2051 : ${inhibit_libc=false}
2052 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
2053        test x$with_newlib = xyes ; } &&
2054      { test "x$with_headers" = xno || test ! -f "$target_header_dir/stdio.h"; } ; then
2055        inhibit_libc=true
2056 fi
2057 AC_SUBST(inhibit_libc)
2058
2059 # When building gcc with a cross-compiler, we need to adjust things so
2060 # that the generator programs are still built with the native compiler.
2061 # Also, we cannot run fixincludes.
2062
2063 # These are the normal (build=host) settings:
2064 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
2065 CXX_FOR_BUILD='$(CXX)'          AC_SUBST(CXX_FOR_BUILD)
2066 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
2067 BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
2068 BUILD_LDFLAGS='$(LDFLAGS)'      AC_SUBST(BUILD_LDFLAGS)
2069 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
2070
2071 BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS)' AC_SUBST(BUILD_NO_PIE_CFLAGS)
2072 BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG)' AC_SUBST(BUILD_NO_PIE_FLAG)
2073
2074 # And these apply if build != host, or we are generating coverage data
2075 if test x$build != x$host || test "x$coverage_flags" != x
2076 then
2077     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
2078     BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CXXFLAGS_FOR_BUILD)'
2079     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
2080
2081     NO_PIE_CFLAGS_FOR_BUILD=${NO_PIE_CFLAGS_FOR_BUILD-${NO_PIE_CFLAGS}}
2082     NO_PIE_FLAG_FOR_BUILD=${NO_PIE_FLAG_FOR_BUILD-${NO_PIE_FLAG}}
2083     BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS_FOR_BUILD)'
2084     BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG_FOR_BUILD)'
2085 fi
2086 AC_SUBST(NO_PIE_CFLAGS_FOR_BUILD)
2087 AC_SUBST(NO_PIE_FLAG_FOR_BUILD)
2088
2089 # Expand extra_headers to include complete path.
2090 # This substitutes for lots of t-* files.
2091 extra_headers_list=
2092 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
2093 for file in ${extra_headers} ; do
2094   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
2095 done
2096
2097 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
2098 if test x"$use_gcc_tgmath" = xyes
2099 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
2100 fi
2101
2102 # Define collect2 in Makefile.
2103 case $host_can_use_collect2 in
2104   no) collect2= ;;
2105   *) collect2='collect2$(exeext)' ;;
2106 esac
2107 AC_SUBST([collect2])
2108
2109 # Add a definition of USE_COLLECT2 if system wants one.
2110 case $use_collect2 in
2111   no) use_collect2= ;;
2112   "") ;;
2113   *)
2114     host_xm_defines="${host_xm_defines} USE_COLLECT2"
2115     xm_defines="${xm_defines} USE_COLLECT2"
2116     case $host_can_use_collect2 in
2117       no)
2118         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
2119         ;;
2120     esac
2121     ;;
2122 esac
2123
2124 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
2125 [Define to the name of the LTO plugin DSO that must be
2126   passed to the linker's -plugin=LIB option.])
2127
2128 # ---------------------------
2129 # Assembler & linker features
2130 # ---------------------------
2131
2132 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
2133 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
2134 # However when ld-new is first executed from the build tree, libtool will
2135 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
2136 # to the build tree.  While doing this we need to use the previous-stage
2137 # linker, or we have an infinite loop.  The presence of a shell script as
2138 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
2139 # the gcc/collect-ld script.  So we need to know how libtool works, or
2140 # exec-tool will fail.
2141
2142 m4_defun([_LT_CONFIG_COMMANDS], [])
2143 AC_PROG_LIBTOOL
2144 AC_SUBST(objdir)
2145 AC_SUBST(enable_fast_install)
2146
2147 # Identify the assembler which will work hand-in-glove with the newly
2148 # built GCC, so that we can examine its features.  This is the assembler
2149 # which will be driven by the driver program.
2150 #
2151 # If build != host, and we aren't building gas in-tree, we identify a
2152 # build->target assembler and hope that it will have the same features
2153 # as the host->target assembler we'll be using.
2154 gcc_cv_gas_major_version=
2155 gcc_cv_gas_minor_version=
2156 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
2157
2158 m4_pattern_allow([AS_FOR_TARGET])dnl
2159 AS_VAR_SET_IF(gcc_cv_as,, [
2160 if test -x "$DEFAULT_ASSEMBLER"; then
2161         gcc_cv_as="$DEFAULT_ASSEMBLER"
2162 elif test -f $gcc_cv_as_gas_srcdir/configure.ac \
2163      && test -f ../gas/Makefile \
2164      && test x$build = x$host; then
2165         gcc_cv_as=../gas/as-new$build_exeext
2166 elif test -x as$build_exeext; then
2167         # Build using assembler in the current directory.
2168         gcc_cv_as=./as$build_exeext
2169 elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
2170         gcc_cv_as="$AS_FOR_TARGET"
2171 else
2172         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
2173 fi])
2174
2175 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
2176 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
2177 case "$ORIGINAL_AS_FOR_TARGET" in
2178   ./as | ./as$build_exeext) ;;
2179   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
2180 esac
2181
2182 AC_MSG_CHECKING(what assembler to use)
2183 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
2184   # Single tree build which includes gas.  We want to prefer it
2185   # over whatever linker top-level may have detected, since
2186   # we'll use what we're building after installation anyway.
2187   AC_MSG_RESULT(newly built gas)
2188   in_tree_gas=yes
2189   _gcc_COMPUTE_GAS_VERSION
2190   in_tree_gas_is_elf=no
2191   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
2192      || (grep 'obj_format = multi' ../gas/Makefile \
2193          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
2194   then
2195     in_tree_gas_is_elf=yes
2196   fi
2197 else
2198   AC_MSG_RESULT($gcc_cv_as)
2199   in_tree_gas=no
2200 fi
2201
2202 default_ld=
2203 AC_ARG_ENABLE(ld,
2204 [[  --enable-ld[=ARG]       build ld [ARG={default,yes,no}]]],
2205 [case "${enableval}" in
2206  no)
2207    default_ld=ld.gold
2208    ;;
2209  esac])
2210
2211 install_gold_as_default=no
2212 AC_ARG_ENABLE(gold,
2213 [[  --enable-gold[=ARG]     build gold [ARG={default,yes,no}]]],
2214 [case "${enableval}" in
2215  default)
2216    install_gold_as_default=yes
2217    ;;
2218  yes)
2219    if test x${default_ld} != x; then
2220      install_gold_as_default=yes
2221    fi
2222    ;;
2223  no)
2224    ;;
2225  *)
2226    AC_MSG_ERROR([invalid --enable-gold argument])
2227    ;;
2228  esac])
2229
2230 # Identify the linker which will work hand-in-glove with the newly
2231 # built GCC, so that we can examine its features.  This is the linker
2232 # which will be driven by the driver program.
2233 #
2234 # If build != host, and we aren't building gas in-tree, we identify a
2235 # build->target linker and hope that it will have the same features
2236 # as the host->target linker we'll be using.
2237 gcc_cv_gld_major_version=
2238 gcc_cv_gld_minor_version=
2239 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
2240 gcc_cv_ld_gold_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gold
2241 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
2242
2243 AS_VAR_SET_IF(gcc_cv_ld,, [
2244 if test -x "$DEFAULT_LINKER"; then
2245         gcc_cv_ld="$DEFAULT_LINKER"
2246 elif test $install_gold_as_default = yes \
2247      && test -f $gcc_cv_ld_gold_srcdir/configure.ac \
2248      && test -f ../gold/Makefile \
2249      && test x$build = x$host; then
2250         gcc_cv_ld=../gold/ld-new$build_exeext
2251 elif test -f $gcc_cv_ld_gld_srcdir/configure.ac \
2252      && test -f ../ld/Makefile \
2253      && test x$build = x$host; then
2254         gcc_cv_ld=../ld/ld-new$build_exeext
2255 elif test -x collect-ld$build_exeext; then
2256         # Build using linker in the current directory.
2257         gcc_cv_ld=./collect-ld$build_exeext
2258 elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
2259         gcc_cv_ld="$LD_FOR_TARGET"
2260 else
2261         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
2262 fi])
2263
2264 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
2265 PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
2266 # if the PLUGIN_LD is set ld-new, just have it as ld
2267 # as that is the installed named.
2268 if test x$PLUGIN_LD_SUFFIX = xld-new \
2269    || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
2270   PLUGIN_LD_SUFFIX=ld
2271 fi
2272 AC_ARG_WITH(plugin-ld,
2273 [AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
2274 [if test x"$withval" != x; then
2275    ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
2276    PLUGIN_LD_SUFFIX="$withval"
2277  fi])
2278 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
2279 AC_DEFINE_UNQUOTED(PLUGIN_LD_SUFFIX, "$PLUGIN_LD_SUFFIX", [Specify plugin linker])
2280
2281 # Check to see if we are using gold instead of ld
2282 AC_MSG_CHECKING(whether we are using gold)
2283 ld_is_gold=no
2284 if test x$gcc_cv_ld != x; then
2285   if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2286      | grep "GNU gold" > /dev/null; then
2287     ld_is_gold=yes
2288   fi
2289 fi
2290 AC_MSG_RESULT($ld_is_gold)
2291
2292 AC_MSG_CHECKING(gold linker with split stack support as non default)
2293 # Check to see if default ld is not gold, but gold is
2294 # available and has support for split stack.  If gcc was configured
2295 # with gold then no checking is done.
2296 #
2297 if test x$ld_is_gold = xno && which ${gcc_cv_ld}.gold >/dev/null 2>&1; then
2298
2299 # For platforms other than powerpc64*, enable as appropriate.
2300
2301   gold_non_default=no
2302   ld_gold=`which ${gcc_cv_ld}.gold`
2303 # Make sure this gold has minimal split stack support
2304   if $ld_gold --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
2305     ld_vers=`$ld_gold --version | sed 1q`
2306     gold_vers=`echo $ld_vers | sed -n \
2307           -e 's,^[[^)]]*[[  ]]\([[0-9]][[0-9]]*\.[[0-9]][[0-9]]*[[^)]]*\)) .*$,\1,p'`
2308     case $target in
2309 # check that the gold version contains the complete split stack support
2310 # on powerpc64 big and little endian
2311       powerpc64*-*-*)
2312         case "$gold_vers" in
2313           2.25.[[1-9]]*|2.2[[6-9]][[.0-9]]*|2.[[3-9]][[.0-9]]*|[[3-9]].[[.0-9]]*) gold_non_default=yes
2314           ;;
2315           *) gold_non_default=no
2316           ;;
2317         esac
2318         ;;
2319     esac
2320   fi
2321   if test $gold_non_default = yes; then
2322     AC_DEFINE(HAVE_GOLD_NON_DEFAULT_SPLIT_STACK, 1,
2323             [Define if the gold linker supports split stack and is available as a non-default])
2324   fi
2325 fi
2326 AC_MSG_RESULT($gold_non_default)
2327
2328 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
2329 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
2330 case "$ORIGINAL_LD_FOR_TARGET" in
2331   ./collect-ld | ./collect-ld$build_exeext) ;;
2332   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
2333 esac
2334
2335 AC_MSG_CHECKING(what linker to use)
2336 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
2337    || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
2338         # Single tree build which includes ld.  We want to prefer it
2339         # over whatever linker top-level may have detected, since
2340         # we'll use what we're building after installation anyway.
2341         AC_MSG_RESULT(newly built ld)
2342         in_tree_ld=yes
2343         in_tree_ld_is_elf=no
2344         if (grep 'EMUL = .*elf' ../ld/Makefile \
2345             || grep 'EMUL = .*linux' ../ld/Makefile \
2346             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
2347           in_tree_ld_is_elf=yes
2348         elif test "$ld_is_gold" = yes; then
2349           in_tree_ld_is_elf=yes
2350         fi
2351         for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.ac $gcc_cv_ld_gld_srcdir/Makefile.in
2352         do
2353 changequote(,)dnl
2354                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*VERSION=[^0-9A-Za-z_]*\([0-9]*\.[0-9]*.*\)/VERSION=\1/p' < $f`
2355                 if test x$gcc_cv_gld_version != x; then
2356                         break
2357                 fi
2358         done
2359         case $gcc_cv_gld_version in
2360           VERSION=[0-9]*) ;;
2361 changequote([,])dnl
2362           *) AC_MSG_ERROR([[cannot find version of in-tree linker]]) ;;
2363 changequote(,)dnl
2364         esac
2365         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
2366         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
2367 changequote([,])dnl
2368         ORIGINAL_LD_BFD_FOR_TARGET=../ld/ld-new$build_exeext
2369         ORIGINAL_LD_GOLD_FOR_TARGET=../gold/ld-new$build_exeext
2370 else
2371         AC_MSG_RESULT($gcc_cv_ld)
2372         in_tree_ld=no
2373         gcc_cvs_ld_program=`dirname $gcc_cv_ld`/`basename $gcc_cv_ld $host_exeext`
2374         ORIGINAL_LD_BFD_FOR_TARGET=${gcc_cvs_ld_program}.bfd$host_exeext
2375         ORIGINAL_LD_GOLD_FOR_TARGET=${gcc_cvs_ld_program}.gold$host_exeext
2376 fi
2377
2378 AC_SUBST(ORIGINAL_LD_BFD_FOR_TARGET)
2379 AC_SUBST(ORIGINAL_LD_GOLD_FOR_TARGET)
2380
2381 # Figure out what nm we will be using.
2382 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2383 AS_VAR_SET_IF(gcc_cv_nm,, [
2384 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2385      && test -f ../binutils/Makefile \
2386      && test x$build = x$host; then
2387         gcc_cv_nm=../binutils/nm-new$build_exeext
2388 elif test -x nm$build_exeext; then
2389         gcc_cv_nm=./nm$build_exeext
2390 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2391         gcc_cv_nm="$NM_FOR_TARGET"
2392 else
2393         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2394 fi])
2395
2396 AC_MSG_CHECKING(what nm to use)
2397 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2398         # Single tree build which includes binutils.
2399         AC_MSG_RESULT(newly built nm)
2400         in_tree_nm=yes
2401 else
2402         AC_MSG_RESULT($gcc_cv_nm)
2403         in_tree_nm=no
2404 fi
2405
2406 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2407 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2408 case "$ORIGINAL_NM_FOR_TARGET" in
2409   ./nm | ./nm$build_exeext) ;;
2410   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2411 esac
2412
2413
2414 # Figure out what objdump we will be using.
2415 AS_VAR_SET_IF(gcc_cv_objdump,, [
2416 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2417      && test -f ../binutils/Makefile \
2418      && test x$build = x$host; then
2419         # Single tree build which includes binutils.
2420         gcc_cv_objdump=../binutils/objdump$build_exeext
2421 elif test -x objdump$build_exeext; then
2422         gcc_cv_objdump=./objdump$build_exeext
2423 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2424         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2425 else
2426         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2427 fi])
2428
2429 AC_MSG_CHECKING(what objdump to use)
2430 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2431         # Single tree build which includes binutils.
2432         AC_MSG_RESULT(newly built objdump)
2433 elif test x$gcc_cv_objdump = x; then
2434         AC_MSG_RESULT(not found)
2435 else
2436         AC_MSG_RESULT($gcc_cv_objdump)
2437 fi
2438
2439 # Figure out what readelf we will be using.
2440 AS_VAR_SET_IF(gcc_cv_readelf,, [
2441 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2442      && test -f ../binutils/Makefile \
2443      && test x$build = x$host; then
2444         # Single tree build which includes binutils.
2445         gcc_cv_readelf=../binutils/readelf$build_exeext
2446 elif test -x readelf$build_exeext; then
2447         gcc_cv_readelf=./readelf$build_exeext
2448 elif ( set dummy $READELF_FOR_TARGET; test -x $[2] ); then
2449         gcc_cv_readelf="$READELF_FOR_TARGET"
2450 else
2451         AC_PATH_PROG(gcc_cv_readelf, $READELF_FOR_TARGET)
2452 fi])
2453
2454 AC_MSG_CHECKING(what readelf to use)
2455 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2456         # Single tree build which includes binutils.
2457         AC_MSG_RESULT(newly built readelf)
2458 elif test x$gcc_cv_readelf = x; then
2459         AC_MSG_RESULT(not found)
2460 else
2461         AC_MSG_RESULT($gcc_cv_readelf)
2462 fi
2463
2464 # Figure out what assembler alignment features are present.
2465 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2466  [2,6,0],,
2467 [.balign 4
2468 .p2align 2],,
2469 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2470   [Define if your assembler supports .balign and .p2align.])])
2471
2472 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2473  [2,8,0],,
2474  [.p2align 4,,7],,
2475 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2476   [Define if your assembler supports specifying the maximum number
2477    of bytes to skip when using the GAS .p2align command.])])
2478
2479 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2480  [2,8,0],,
2481  [.literal16],,
2482 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2483   [Define if your assembler supports .literal16.])])
2484
2485 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2486  [elf,2,9,0],,
2487  [conftest_label1: .word 0
2488 .subsection -1
2489 conftest_label2: .word 0
2490 .previous],
2491  [if test x$gcc_cv_nm != x; then
2492     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2493     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2494     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2495     then :
2496     else gcc_cv_as_subsection_m1=yes
2497     fi
2498     rm -f conftest.nm1 conftest.nm2
2499   fi],
2500  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2501   [Define if your assembler supports .subsection and .subsection -1 starts
2502    emitting at the beginning of your section.])])
2503
2504 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2505  [2,2,0],,
2506  [      .weak foobar],,
2507 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2508
2509 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2510  [2,17,0],,
2511  [      .weakref foobar, barfnot],,
2512 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2513
2514 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2515  [2,15,91],,
2516  [      .SPACE $TEXT$
2517         .NSUBSPA $CODE$,COMDAT],,
2518 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2519
2520 # .hidden needs to be supported in both the assembler and the linker,
2521 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2522 # This is irritatingly difficult to feature test for; we have to check the
2523 # date string after the version number.  If we've got an in-tree
2524 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2525 # to be safe.
2526 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2527 case "${target}" in
2528   *-*-aix*)
2529     conftest_s='        .globl foobar,hidden'
2530     ;;
2531   *)
2532     conftest_s='        .hidden foobar
2533 foobar:'
2534     ;;
2535 esac
2536 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2537  [elf,2,13,0],, [$conftest_s])
2538 case "${target}" in
2539   *-*-darwin*)
2540     # Darwin as has some visibility support, though with a different syntax.
2541     gcc_cv_as_hidden=yes
2542     ;;
2543 esac
2544
2545 # gnu_indirect_function type is an extension proposed at
2546 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2547 # selection of function implementation
2548 AC_ARG_ENABLE(gnu-indirect-function,
2549  [AS_HELP_STRING([--enable-gnu-indirect-function],
2550                  [enable the use of the @gnu_indirect_function to glibc systems])],
2551  [case $enable_gnu_indirect_function in
2552     yes | no) ;;
2553     *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2554 Valid choices are 'yes' and 'no'.]) ;;
2555   esac],
2556  [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2557
2558 gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
2559 AC_DEFINE_UNQUOTED(HAVE_GNU_INDIRECT_FUNCTION, $gif,
2560 [Define if your system supports gnu indirect functions.])
2561
2562
2563 changequote(,)dnl
2564 if test $in_tree_ld != yes ; then
2565   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2566   if echo "$ld_ver" | grep GNU > /dev/null; then
2567     if test x"$ld_is_gold" = xyes; then
2568       # GNU gold --version looks like this:
2569       #
2570       # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
2571       #
2572       # We extract the binutils version which is more familiar and specific
2573       # than the gold version.
2574       ld_vers=`echo $ld_ver | sed -n \
2575           -e 's,^[^)]*[  ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
2576     else
2577       # GNU ld --version looks like this:
2578       #
2579       # GNU ld (GNU Binutils) 2.21.51.20110225
2580       ld_vers=`echo $ld_ver | sed -n \
2581           -e 's,^.*[     ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2582     fi
2583     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2584     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2585     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2586     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2587   else
2588     case "${target}" in
2589       *-*-solaris2*)
2590         # See acinclude.m4 (gcc_SUN_LD_VERSION) for the version number
2591         # format.
2592         #
2593         # Don't reuse gcc_gv_sun_ld_vers_* in case a linker other than
2594         # /usr/ccs/bin/ld has been configured.
2595         ld_ver=`$gcc_cv_ld -V 2>&1`
2596         if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2597           ld_vers=`echo $ld_ver | sed -n \
2598             -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2599           ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2600           ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2601         fi
2602         ;;
2603     esac
2604   fi
2605 fi
2606 changequote([,])dnl
2607
2608 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2609 [[if test $in_tree_ld = yes ; then
2610   gcc_cv_ld_hidden=no
2611   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2612      && test $in_tree_ld_is_elf = yes; then
2613      gcc_cv_ld_hidden=yes
2614   fi
2615 else
2616   gcc_cv_ld_hidden=yes
2617   if test x"$ld_is_gold" = xyes; then
2618     :
2619   elif echo "$ld_ver" | grep GNU > /dev/null; then
2620     case "${target}" in
2621       mmix-knuth-mmixware)
2622         # The linker emits by default mmo, not ELF, so "no" is appropriate.
2623         gcc_cv_ld_hidden=no
2624         ;;
2625     esac
2626     if test 0"$ld_date" -lt 20020404; then
2627       if test -n "$ld_date"; then
2628         # If there was date string, but was earlier than 2002-04-04, fail
2629         gcc_cv_ld_hidden=no
2630       elif test -z "$ld_vers"; then
2631         # If there was no date string nor ld version number, something is wrong
2632         gcc_cv_ld_hidden=no
2633       else
2634         test -z "$ld_vers_patch" && ld_vers_patch=0
2635         if test "$ld_vers_major" -lt 2; then
2636           gcc_cv_ld_hidden=no
2637         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2638           gcc_cv_ld_hidden="no"
2639         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2640           gcc_cv_ld_hidden=no
2641         fi
2642       fi
2643     fi
2644   else
2645     case "${target}" in
2646       *-*-aix[789]*)
2647         gcc_cv_ld_hidden=yes
2648         ;;
2649       *-*-darwin*)
2650         # Darwin ld has some visibility support.
2651         gcc_cv_ld_hidden=yes
2652         ;;
2653       hppa64*-*-hpux* | ia64*-*-hpux*)
2654         gcc_cv_ld_hidden=yes
2655         ;;
2656       *-*-solaris2.1[0-9]*)
2657         # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2658         # .symbolic was only added in Solaris 9 12/02.
2659         gcc_cv_ld_hidden=yes
2660         ;;
2661       *)
2662         gcc_cv_ld_hidden=no
2663         ;;
2664     esac
2665   fi
2666 fi]])
2667 libgcc_visibility=no
2668 AC_SUBST(libgcc_visibility)
2669 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2670 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2671   libgcc_visibility=yes
2672   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2673   [Define if your assembler and linker support .hidden.])
2674 fi
2675
2676 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2677 gcc_cv_ld_ro_rw_mix=unknown
2678 if test $in_tree_ld = yes ; then
2679   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2680      && test $in_tree_ld_is_elf = yes; then
2681     gcc_cv_ld_ro_rw_mix=read-write
2682   fi
2683 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2684   echo '.section myfoosect, "a"' > conftest1.s
2685   echo '.section myfoosect, "aw"' > conftest2.s
2686   echo '.byte 1' >> conftest2.s
2687   echo '.section myfoosect, "a"' > conftest3.s
2688   echo '.byte 0' >> conftest3.s
2689   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2690      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2691      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2692      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2693         conftest2.o conftest3.o > /dev/null 2>&1; then
2694     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2695                          | sed -e '/myfoosect/!d' -e N`
2696     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2697       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2698         gcc_cv_ld_ro_rw_mix=read-only
2699       else
2700         gcc_cv_ld_ro_rw_mix=read-write
2701       fi
2702     fi
2703   fi
2704 changequote(,)dnl
2705   rm -f conftest.* conftest[123].*
2706 changequote([,])dnl
2707 fi
2708 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2709         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2710   [Define if your linker links a mix of read-only
2711    and read-write sections into a read-write section.])
2712 fi
2713 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2714
2715 gcc_AC_INITFINI_ARRAY
2716
2717 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2718 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2719   [elf,2,11,0],,
2720 [       .data
2721         .uleb128 L2 - L1
2722 L1:
2723         .uleb128 1280
2724         .sleb128 -1010
2725 L2:],
2726 [[# GAS versions before 2.11 do not support uleb128,
2727   # despite appearing to.
2728   # ??? There exists an elf-specific test that will crash
2729   # the assembler.  Perhaps it's better to figure out whether
2730   # arbitrary sections are supported and try the test.
2731   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2732   if echo "$as_ver" | grep GNU > /dev/null; then
2733     as_vers=`echo $as_ver | sed -n \
2734         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2735     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2736     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2737     if test $as_major -eq 2 && test $as_minor -lt 11
2738     then :
2739     else gcc_cv_as_leb128=yes
2740     fi
2741   fi]],
2742   [AC_DEFINE(HAVE_AS_LEB128, 1,
2743     [Define if your assembler supports .sleb128 and .uleb128.])],
2744   [AC_DEFINE(HAVE_AS_LEB128, 0,
2745     [Define if your assembler supports .sleb128 and .uleb128.])])
2746
2747 # Check if we have assembler support for unwind directives.
2748 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2749   ,,
2750 [       .text
2751         .cfi_startproc
2752         .cfi_offset 0, 0
2753         .cfi_same_value 1
2754         .cfi_def_cfa 1, 2
2755         .cfi_escape 1, 2, 3, 4, 5
2756         .cfi_endproc],
2757 [case "$target" in
2758   *-*-solaris*)
2759     # If the linker used on Solaris (like Sun ld) isn't capable of merging
2760     # read-only and read-write sections, we need to make sure that the
2761     # assembler used emits read-write .eh_frame sections.
2762     if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2763       if test "x$gcc_cv_objdump" != x; then
2764         if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2765                 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2766           gcc_cv_as_cfi_directive=no
2767         else
2768           case "$target" in
2769             i?86-*-solaris2.1[[0-9]]* | x86_64-*-solaris2.1[[0-9]]*)
2770               # On Solaris/x86, make sure that GCC and assembler agree on using
2771               # read-only .eh_frame sections for 64-bit.
2772               if test x$gas = xyes; then
2773                  as_ix86_64_opt="--64"
2774               else
2775                  as_ix86_64_opt="-xarch=amd64"
2776               fi
2777               if $gcc_cv_as $as_ix86_64_opt -o conftest.o conftest.s > /dev/null 2>&1 && \
2778                 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2779                         sed -e /.eh_frame/!d -e N | \
2780                         grep READONLY > /dev/null; then
2781                 gcc_cv_as_cfi_directive=yes
2782               else
2783                 gcc_cv_as_cfi_directive=no
2784               fi
2785               ;;
2786             *)
2787               gcc_cv_as_cfi_directive=yes
2788               ;;
2789           esac
2790         fi
2791       else
2792         # no objdump, err on the side of caution
2793         gcc_cv_as_cfi_directive=no
2794       fi
2795     else
2796       gcc_cv_as_cfi_directive=yes
2797     fi
2798     ;;
2799   *-*-*)
2800     gcc_cv_as_cfi_directive=yes
2801     ;;
2802 esac])
2803 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2804 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2805   ,,
2806 [       .text
2807         .cfi_startproc
2808         .cfi_adjust_cfa_offset 64
2809         .skip 75040, 0
2810         .cfi_adjust_cfa_offset 128
2811         .cfi_endproc],
2812 [[
2813 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2814     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
2815    gcc_cv_as_cfi_advance_working=yes
2816 fi
2817 ]])
2818 else
2819   # no objdump, err on the side of caution
2820   gcc_cv_as_cfi_advance_working=no
2821 fi
2822 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2823 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2824   [`if test $gcc_cv_as_cfi_directive = yes \
2825        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2826   [Define 0/1 if your assembler supports CFI directives.])
2827
2828 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2829 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2830   gcc_cv_as_cfi_personality_directive, ,,
2831 [       .text
2832         .cfi_startproc
2833         .cfi_personality 0, symbol
2834         .cfi_endproc])
2835 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2836   [`if test $gcc_cv_as_cfi_personality_directive = yes;
2837     then echo 1; else echo 0; fi`],
2838   [Define 0/1 if your assembler supports .cfi_personality.])
2839
2840 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2841   gcc_cv_as_cfi_sections_directive, ,,
2842 [       .text
2843         .cfi_sections .debug_frame, .eh_frame
2844         .cfi_startproc
2845         .cfi_endproc],
2846 [case $target_os in
2847   win32 | pe | cygwin* | mingw32*)
2848     # Need to check that we generated the correct relocation for the
2849     # .debug_frame section.  This was fixed for binutils 2.21.
2850     gcc_cv_as_cfi_sections_directive=no
2851     if test "x$gcc_cv_objdump" != x; then
2852      if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2853         grep secrel > /dev/null; then
2854       gcc_cv_as_cfi_sections_directive=yes
2855      fi
2856     fi
2857     ;;
2858   *)
2859     gcc_cv_as_cfi_sections_directive=yes
2860     ;;
2861 esac])
2862 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2863 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2864   [`if test $gcc_cv_as_cfi_sections_directive = yes;
2865     then echo 1; else echo 0; fi`],
2866   [Define 0/1 if your assembler supports .cfi_sections.])
2867
2868 # GAS versions up to and including 2.11.0 may mis-optimize
2869 # .eh_frame data.
2870 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2871   [elf,2,12,0],,
2872 [       .text
2873 .LFB1:
2874         .4byte  0
2875 .L1:
2876         .4byte  0
2877 .LFE1:
2878         .section        .eh_frame,"aw",@progbits
2879 __FRAME_BEGIN__:
2880         .4byte  .LECIE1-.LSCIE1
2881 .LSCIE1:
2882         .4byte  0x0
2883         .byte   0x1
2884         .ascii "z\0"
2885         .byte   0x1
2886         .byte   0x78
2887         .byte   0x1a
2888         .byte   0x0
2889         .byte   0x4
2890         .4byte  1
2891         .p2align 1
2892 .LECIE1:
2893 .LSFDE1:
2894         .4byte  .LEFDE1-.LASFDE1
2895 .LASFDE1:
2896         .4byte  .LASFDE1-__FRAME_BEGIN__
2897         .4byte  .LFB1
2898         .4byte  .LFE1-.LFB1
2899         .byte   0x4
2900         .4byte  .LFE1-.LFB1
2901         .byte   0x4
2902         .4byte  .L1-.LFB1
2903 .LEFDE1:],
2904 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2905 cat > conftest.lit <<EOF
2906  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2907  0010 01000000 12000000 18000000 00000000  ................
2908  0020 08000000 04080000 0044               .........D      @&t@
2909 EOF
2910 cat > conftest.big <<EOF
2911  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2912  0010 00000001 00000012 00000018 00000000  ................
2913  0020 00000008 04000000 0844               .........D      @&t@
2914 EOF
2915   # If the assembler didn't choke, and we can objdump,
2916   # and we got the correct data, then succeed.
2917   # The text in the here-document typically retains its unix-style line
2918   # endings, while the output of objdump will use host line endings.
2919   # Therefore, use diff -b for the comparisons.
2920   if test x$gcc_cv_objdump != x \
2921   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2922      | tail -3 > conftest.got \
2923   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2924     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2925   then
2926     gcc_cv_as_eh_frame=yes
2927   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2928     gcc_cv_as_eh_frame=buggy
2929   else
2930     # Uh oh, what do we do now?
2931     gcc_cv_as_eh_frame=no
2932   fi])
2933
2934 if test $gcc_cv_as_eh_frame = buggy; then
2935   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2936   [Define if your assembler mis-optimizes .eh_frame data.])
2937 fi
2938
2939 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2940  [elf,2,12,0], [--fatal-warnings],
2941  [.section .rodata.str, "aMS", @progbits, 1])
2942 if test $gcc_cv_as_shf_merge = no; then
2943   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2944     [elf,2,12,0], [--fatal-warnings],
2945     [.section .rodata.str, "aMS", %progbits, 1])
2946 fi
2947 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2948   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2949 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2950
2951 gcc_GAS_CHECK_FEATURE([stabs directive], gcc_cv_as_stabs_directive, ,,
2952 [.stabs "gcc2_compiled.",60,0,0,0],,
2953 [AC_DEFINE(HAVE_AS_STABS_DIRECTIVE, 1,
2954   [Define if your assembler supports .stabs.])])
2955
2956 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
2957  gcc_cv_as_comdat_group,
2958  [elf,2,16,0], [--fatal-warnings],
2959  [.section .text,"axG",@progbits,.foo,comdat])
2960 if test $gcc_cv_as_comdat_group = yes; then
2961   gcc_cv_as_comdat_group_percent=no
2962   gcc_cv_as_comdat_group_group=no
2963 else
2964  gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
2965    gcc_cv_as_comdat_group_percent,
2966    [elf,2,16,0], [--fatal-warnings],
2967    [.section .text,"axG",%progbits,.foo,comdat])
2968  if test $gcc_cv_as_comdat_group_percent = yes; then
2969    gcc_cv_as_comdat_group_group=no
2970  else
2971    case "${target}" in
2972      # Sun as uses a completely different syntax.
2973      *-*-solaris2*)
2974        case "${target}" in
2975          sparc*-*-solaris2*)
2976            conftest_s='
2977                .group foo,".text%foo",#comdat
2978                .section ".text%foo", #alloc,#execinstr,#progbits
2979                .globl foo
2980              foo:
2981              '
2982            ;;
2983          i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
2984            conftest_s='
2985                .group foo,.text%foo,#comdat
2986                .section .text%foo, "ax", @progbits
2987                .globl  foo
2988              foo:
2989              '
2990            ;;
2991        esac
2992        gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
2993          gcc_cv_as_comdat_group_group,
2994          ,, [$conftest_s])
2995        ;;
2996    esac
2997    if test -z "${gcc_cv_as_comdat_group_group+set}"; then
2998      gcc_cv_as_comdat_group_group=no
2999    fi
3000  fi
3001 fi
3002 if test x"$ld_is_gold" = xyes; then
3003   comdat_group=yes
3004 elif test $in_tree_ld = yes ; then
3005   comdat_group=no
3006   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
3007      && test $in_tree_ld_is_elf = yes; then
3008      comdat_group=yes
3009   fi
3010 elif echo "$ld_ver" | grep GNU > /dev/null; then
3011   comdat_group=yes
3012   if test 0"$ld_date" -lt 20050308; then
3013     if test -n "$ld_date"; then
3014       # If there was date string, but was earlier than 2005-03-08, fail
3015       comdat_group=no
3016     elif test "$ld_vers_major" -lt 2; then
3017       comdat_group=no
3018     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
3019       comdat_group=no
3020     fi
3021   fi
3022 else
3023 changequote(,)dnl
3024   case "${target}" in
3025     *-*-solaris2.1[1-9]*)
3026       comdat_group=no
3027       # Sun ld has COMDAT group support since Solaris 9, but it doesn't
3028       # interoperate with GNU as until Solaris 11 build 130, i.e. ld
3029       # version 1.688.
3030       #
3031       # If using Sun as for COMDAT group as emitted by GCC, one needs at
3032       # least ld version 1.2267.
3033       if test "$ld_vers_major" -gt 1; then
3034         comdat_group=yes
3035       elif test "x$gas_flag" = xyes && test "$ld_vers_minor" -ge 1688; then
3036         comdat_group=yes
3037       elif test "$ld_vers_minor" -ge 2267; then
3038         comdat_group=yes
3039       fi
3040       ;;
3041     *)
3042       # Assume linkers other than GNU ld don't support COMDAT group.
3043       comdat_group=no
3044       ;;
3045   esac
3046 changequote([,])dnl
3047 fi
3048 # Allow overriding the automatic COMDAT group tests above.
3049 AC_ARG_ENABLE(comdat,
3050   [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
3051   [comdat_group="$enable_comdat"])
3052 if test $comdat_group = no; then
3053   gcc_cv_as_comdat_group=no
3054   gcc_cv_as_comdat_group_percent=no
3055   gcc_cv_as_comdat_group_group=no
3056 fi
3057 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
3058   [`if test $gcc_cv_as_comdat_group = yes \
3059     || test $gcc_cv_as_comdat_group_percent = yes \
3060     || test $gcc_cv_as_comdat_group_group = yes; then echo 1; else echo 0; fi`],
3061 [Define 0/1 if your assembler and linker support COMDAT groups.])
3062
3063 gcc_GAS_CHECK_FEATURE([line table discriminator support],
3064  gcc_cv_as_discriminator,
3065  [2,19,51],,
3066 [       .text
3067         .file 1 "conf.c"
3068         .loc 1 1 0 discriminator 1],,
3069 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
3070   [Define if your assembler supports the .loc discriminator sub-directive.])])
3071
3072 # Thread-local storage - the check is heavily parameterized.
3073 conftest_s=
3074 tls_first_major=
3075 tls_first_minor=
3076 tls_as_opt=
3077 case "$target" in
3078 changequote(,)dnl
3079   alpha*-*-*)
3080     conftest_s='
3081         .section ".tdata","awT",@progbits
3082 foo:    .long   25
3083         .text
3084         ldq     $27,__tls_get_addr($29)         !literal!1
3085         lda     $16,foo($29)                    !tlsgd!1
3086         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
3087         ldq     $27,__tls_get_addr($29)         !literal!2
3088         lda     $16,foo($29)                    !tlsldm!2
3089         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
3090         ldq     $1,foo($29)                     !gotdtprel
3091         ldah    $2,foo($29)                     !dtprelhi
3092         lda     $3,foo($2)                      !dtprello
3093         lda     $4,foo($29)                     !dtprel
3094         ldq     $1,foo($29)                     !gottprel
3095         ldah    $2,foo($29)                     !tprelhi
3096         lda     $3,foo($2)                      !tprello
3097         lda     $4,foo($29)                     !tprel'
3098         tls_first_major=2
3099         tls_first_minor=13
3100         tls_as_opt=--fatal-warnings
3101         ;;
3102   arc*-*-*)
3103     conftest_s='
3104         add_s r0,r0, @foo@tpoff'
3105         tls_first_major=2
3106         tls_first_minor=23
3107         ;;
3108   cris-*-*|crisv32-*-*)
3109     conftest_s='
3110         .section ".tdata","awT",@progbits
3111 x:      .long   25
3112         .text
3113         move.d x:IE,$r10
3114         nop'
3115         tls_first_major=2
3116         tls_first_minor=20
3117         tls_as_opt=--fatal-warnings
3118         ;;
3119   frv*-*-*)
3120     conftest_s='
3121         .section ".tdata","awT",@progbits
3122 x:      .long   25
3123         .text
3124         call    #gettlsoff(x)'
3125         tls_first_major=2
3126         tls_first_minor=14
3127         ;;
3128   hppa*-*-linux*)
3129     conftest_s='
3130 t1:     .reg    %r20
3131 t2:     .reg    %r21
3132 gp:     .reg    %r19
3133         .section ".tdata","awT",@progbits
3134 foo:    .long   25
3135         .text
3136         .align  4
3137         addil LT%foo-$tls_gdidx$,gp
3138         ldo RT%foo-$tls_gdidx$(%r1),%arg0
3139         b __tls_get_addr
3140         nop
3141         addil LT%foo-$tls_ldidx$,gp
3142         b __tls_get_addr
3143         ldo RT%foo-$tls_ldidx$(%r1),%arg0
3144         addil LR%foo-$tls_dtpoff$,%ret0
3145         ldo RR%foo-$tls_dtpoff$(%r1),%t1
3146         mfctl %cr27,%t1
3147         addil LT%foo-$tls_ieoff$,gp
3148         ldw RT%foo-$tls_ieoff$(%r1),%t2
3149         add %t1,%t2,%t3
3150         mfctl %cr27,%t1
3151         addil LR%foo-$tls_leoff$,%t1
3152         ldo RR%foo-$tls_leoff$(%r1),%t2'
3153         tls_first_major=2
3154         tls_first_minor=15
3155         tls_as_opt=--fatal-warnings
3156         ;;
3157   arm*-*-*)
3158     conftest_s='
3159         .section ".tdata","awT",%progbits
3160 foo:    .long   25
3161         .text
3162 .word foo(gottpoff)
3163 .word foo(tpoff)
3164 .word foo(tlsgd)
3165 .word foo(tlsldm)
3166 .word foo(tlsldo)'
3167         tls_first_major=2
3168         tls_first_minor=17
3169         ;;
3170   i[34567]86-*-* | x86_64-*-*)
3171     case "$target" in
3172       i[34567]86-*-solaris2.* | x86_64-*-solaris2.1[0-9]*)
3173         on_solaris=yes
3174         ;;
3175       *)
3176         on_solaris=no
3177         ;;
3178     esac
3179     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3180       conftest_s='
3181         .section .tdata,"awt",@progbits'
3182       tls_first_major=0
3183       tls_first_minor=0
3184       tls_section_flag=t
3185 changequote([,])dnl
3186       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
3187 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
3188 changequote(,)dnl
3189     else
3190       conftest_s='
3191         .section ".tdata","awT",@progbits'
3192       tls_first_major=2
3193       tls_first_minor=14
3194       tls_section_flag=T
3195       tls_as_opt="--fatal-warnings"
3196     fi
3197     case "$target" in
3198       i[34567]86-*-*)
3199         conftest_s="$conftest_s
3200 foo:    .long   25
3201         .text
3202         movl    %gs:0, %eax
3203         leal    foo@tlsgd(,%ebx,1), %eax
3204         leal    foo@tlsldm(%ebx), %eax
3205         leal    foo@dtpoff(%eax), %edx
3206         movl    foo@gottpoff(%ebx), %eax
3207         subl    foo@gottpoff(%ebx), %eax
3208         addl    foo@gotntpoff(%ebx), %eax
3209         movl    foo@indntpoff, %eax
3210         movl    \$foo@tpoff, %eax
3211         subl    \$foo@tpoff, %eax
3212         leal    foo@ntpoff(%ecx), %eax"
3213         ;;
3214       x86_64-*-*)
3215         if test x$on_solaris = xyes; then
3216           case $gas_flag in
3217             yes) tls_as_opt="$tls_as_opt --64" ;;
3218             no)  tls_as_opt="$tls_as_opt -xarch=amd64" ;;
3219           esac
3220         fi
3221         conftest_s="$conftest_s
3222 foo:    .long   25
3223         .text
3224         movq    %fs:0, %rax
3225         leaq    foo@tlsgd(%rip), %rdi
3226         leaq    foo@tlsld(%rip), %rdi
3227         leaq    foo@dtpoff(%rax), %rdx
3228         movq    foo@gottpoff(%rip), %rax
3229         movq    \$foo@tpoff, %rax"
3230         ;;
3231     esac
3232     ;;
3233   ia64-*-*)
3234     conftest_s='
3235         .section ".tdata","awT",@progbits
3236 foo:    data8   25
3237         .text
3238         addl    r16 = @ltoff(@dtpmod(foo#)), gp
3239         addl    r17 = @ltoff(@dtprel(foo#)), gp
3240         addl    r18 = @ltoff(@tprel(foo#)), gp
3241         addl    r19 = @dtprel(foo#), gp
3242         adds    r21 = @dtprel(foo#), r13
3243         movl    r23 = @dtprel(foo#)
3244         addl    r20 = @tprel(foo#), gp
3245         adds    r22 = @tprel(foo#), r13
3246         movl    r24 = @tprel(foo#)'
3247         tls_first_major=2
3248         tls_first_minor=13
3249         tls_as_opt=--fatal-warnings
3250         ;;
3251   microblaze*-*-*)
3252     conftest_s='
3253         .section .tdata,"awT",@progbits
3254 x:
3255         .word 2
3256         .text
3257         addik r5,r20,x@TLSGD
3258         addik r5,r20,x@TLSLDM'
3259         tls_first_major=2
3260         tls_first_minor=20
3261         tls_as_opt='--fatal-warnings'
3262         ;;
3263   mips*-*-*)
3264     conftest_s='
3265         .section .tdata,"awT",@progbits
3266 x:
3267         .word 2
3268         .text
3269         addiu $4, $28, %tlsgd(x)
3270         addiu $4, $28, %tlsldm(x)
3271         lui $4, %dtprel_hi(x)
3272         addiu $4, $4, %dtprel_lo(x)
3273         lw $4, %gottprel(x)($28)
3274         lui $4, %tprel_hi(x)
3275         addiu $4, $4, %tprel_lo(x)'
3276         tls_first_major=2
3277         tls_first_minor=16
3278         tls_as_opt='-32 --fatal-warnings'
3279         ;;
3280   m68k-*-*)
3281     conftest_s='
3282         .section .tdata,"awT",@progbits
3283 x:
3284         .word 2
3285         .text
3286 foo:
3287         move.l x@TLSGD(%a5),%a0
3288         move.l x@TLSLDM(%a5),%a0
3289         move.l x@TLSLDO(%a5),%a0
3290         move.l x@TLSIE(%a5),%a0
3291         move.l x@TLSLE(%a5),%a0'
3292         tls_first_major=2
3293         tls_first_minor=19
3294         tls_as_opt='--fatal-warnings'
3295         ;;
3296   nios2-*-*)
3297       conftest_s='
3298         .section ".tdata","awT",@progbits'
3299         tls_first_major=2
3300         tls_first_minor=23
3301         tls_as_opt="--fatal-warnings"
3302         ;;
3303   aarch64*-*-*)
3304     conftest_s='
3305         .section ".tdata","awT",%progbits
3306 foo:    .long   25
3307         .text
3308         adrp  x0, :tlsgd:x
3309         add   x0, x0, #:tlsgd_lo12:x
3310         bl    __tls_get_addr
3311         nop'
3312         tls_first_major=2
3313         tls_first_minor=20
3314         tls_as_opt='--fatal-warnings'
3315         ;;
3316   powerpc-ibm-aix*)
3317     conftest_s='
3318         .extern __get_tpointer
3319         .toc
3320 LC..1:
3321         .tc a[TC],a[TL]@le
3322         .csect .text[PR]
3323 .tlstest:
3324         lwz 9,LC..1(2)
3325         bla __get_tpointer
3326         lwzx 3,9,3
3327         .globl a
3328         .csect a[TL],4
3329 a:
3330         .space 4'
3331         tls_first_major=0
3332         tls_first_minor=0
3333         ;;
3334   powerpc64*-*-*)
3335     conftest_s='
3336         .section ".tdata","awT",@progbits
3337         .align 3
3338 ld0:    .space 8
3339 ld1:    .space 8
3340 x1:     .space 8
3341 x2:     .space 8
3342 x3:     .space 8
3343         .text
3344         addi 3,2,ld0@got@tlsgd
3345         bl .__tls_get_addr
3346         nop
3347         addi 3,2,ld1@toc
3348         bl .__tls_get_addr
3349         nop
3350         addi 3,2,x1@got@tlsld
3351         bl .__tls_get_addr
3352         nop
3353         addi 9,3,x1@dtprel
3354         bl .__tls_get_addr
3355         nop
3356         addis 9,3,x2@dtprel@ha
3357         addi 9,9,x2@dtprel@l
3358         bl .__tls_get_addr
3359         nop
3360         ld 9,x3@got@dtprel(2)
3361         add 9,9,3
3362         bl .__tls_get_addr
3363         nop'
3364         tls_first_major=2
3365         tls_first_minor=14
3366         tls_as_opt="-a64 --fatal-warnings"
3367         ;;
3368   powerpc*-*-*)
3369     conftest_s='
3370         .section ".tdata","awT",@progbits
3371         .align 2
3372 ld0:    .space 4
3373 ld1:    .space 4
3374 x1:     .space 4
3375 x2:     .space 4
3376 x3:     .space 4
3377         .text
3378         addi 3,31,ld0@got@tlsgd
3379         bl __tls_get_addr
3380         addi 3,31,x1@got@tlsld
3381         bl __tls_get_addr
3382         addi 9,3,x1@dtprel
3383         addis 9,3,x2@dtprel@ha
3384         addi 9,9,x2@dtprel@l
3385         lwz 9,x3@got@tprel(31)
3386         add 9,9,x@tls
3387         addi 9,2,x1@tprel
3388         addis 9,2,x2@tprel@ha
3389         addi 9,9,x2@tprel@l'
3390         tls_first_major=2
3391         tls_first_minor=14
3392         tls_as_opt="-a32 --fatal-warnings"
3393         ;;
3394   riscv*-*-*)
3395     conftest_s='
3396         .section .tdata,"awT",@progbits
3397 x:      .word 2
3398         .text
3399         la.tls.gd a0,x
3400         call __tls_get_addr'
3401         tls_first_major=2
3402         tls_first_minor=21
3403         tls_as_opt='--fatal-warnings'
3404         ;;
3405   s390-*-*)
3406     conftest_s='
3407         .section ".tdata","awT",@progbits
3408 foo:    .long   25
3409         .text
3410         .long   foo@TLSGD
3411         .long   foo@TLSLDM
3412         .long   foo@DTPOFF
3413         .long   foo@NTPOFF
3414         .long   foo@GOTNTPOFF
3415         .long   foo@INDNTPOFF
3416         l       %r1,foo@GOTNTPOFF(%r12)
3417         l       %r1,0(%r1):tls_load:foo
3418         bas     %r14,0(%r1,%r13):tls_gdcall:foo
3419         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
3420         tls_first_major=2
3421         tls_first_minor=14
3422         tls_as_opt="-m31 --fatal-warnings"
3423         ;;
3424   s390x-*-*)
3425     conftest_s='
3426         .section ".tdata","awT",@progbits
3427 foo:    .long   25
3428         .text
3429         .quad   foo@TLSGD
3430         .quad   foo@TLSLDM
3431         .quad   foo@DTPOFF
3432         .quad   foo@NTPOFF
3433         .quad   foo@GOTNTPOFF
3434         lg      %r1,foo@GOTNTPOFF(%r12)
3435         larl    %r1,foo@INDNTPOFF
3436         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
3437         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
3438         tls_first_major=2
3439         tls_first_minor=14
3440         tls_as_opt="-m64 -Aesame --fatal-warnings"
3441         ;;
3442   sh-*-* | sh[123456789lbe]*-*-*)
3443     conftest_s='
3444         .section ".tdata","awT",@progbits
3445 foo:    .long   25
3446         .text
3447         .long   foo@TLSGD
3448         .long   foo@TLSLDM
3449         .long   foo@DTPOFF
3450         .long   foo@GOTTPOFF
3451         .long   foo@TPOFF'
3452         tls_first_major=2
3453         tls_first_minor=13
3454         tls_as_opt=--fatal-warnings
3455         ;;
3456   sparc*-*-*)
3457     case "$target" in
3458       sparc*-sun-solaris2.*)
3459         on_solaris=yes
3460         ;;
3461       *)
3462         on_solaris=no
3463         ;;
3464     esac
3465     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3466       conftest_s='
3467         .section ".tdata",#alloc,#write,#tls'
3468         tls_first_major=0
3469         tls_first_minor=0
3470     else
3471       conftest_s='
3472         .section ".tdata","awT",@progbits'
3473         tls_first_major=2
3474         tls_first_minor=14
3475         tls_as_opt="-32 --fatal-warnings"
3476     fi
3477     conftest_s="$conftest_s
3478 foo:    .long   25
3479         .text
3480         sethi   %tgd_hi22(foo), %o0
3481         add     %o0, %tgd_lo10(foo), %o1
3482         add     %l7, %o1, %o0, %tgd_add(foo)
3483         call    __tls_get_addr, %tgd_call(foo)
3484         sethi   %tldm_hi22(foo), %l1
3485         add     %l1, %tldm_lo10(foo), %l2
3486         add     %l7, %l2, %o0, %tldm_add(foo)
3487         call    __tls_get_addr, %tldm_call(foo)
3488         sethi   %tldo_hix22(foo), %l3
3489         xor     %l3, %tldo_lox10(foo), %l4
3490         add     %o0, %l4, %l5, %tldo_add(foo)
3491         sethi   %tie_hi22(foo), %o3
3492         add     %o3, %tie_lo10(foo), %o3
3493         ld      [%l7 + %o3], %o2, %tie_ld(foo)
3494         add     %g7, %o2, %o4, %tie_add(foo)
3495         sethi   %tle_hix22(foo), %l1
3496         xor     %l1, %tle_lox10(foo), %o5
3497         ld      [%g7 + %o5], %o1"
3498         ;;
3499   tilepro*-*-*)
3500       conftest_s='
3501         .section ".tdata","awT",@progbits
3502 foo:    .long   25
3503         .text
3504         addli   r0, zero, tls_gd(foo)
3505         auli    r0, zero, tls_gd_ha16(foo)
3506         addli   r0, r0, tls_gd_lo16(foo)
3507         jal     __tls_get_addr
3508         addli   r0, zero, tls_ie(foo)
3509         auli    r0, r0, tls_ie_ha16(foo)
3510         addli   r0, r0, tls_ie_lo16(foo)'
3511         tls_first_major=2
3512         tls_first_minor=22
3513         tls_as_opt="--fatal-warnings"
3514         ;;
3515   tilegx*-*-*)
3516       conftest_s='
3517         .section ".tdata","awT",@progbits
3518 foo:    .long   25
3519         .text
3520         shl16insli r0, zero, hw0_last_tls_gd(foo)
3521         shl16insli r0, zero, hw1_last_tls_gd(foo)
3522         shl16insli r0, r0,   hw0_tls_gd(foo)
3523         jal        __tls_get_addr
3524         shl16insli r0, zero, hw1_last_tls_ie(foo)
3525         shl16insli r0, r0,   hw0_tls_ie(foo)'
3526         tls_first_major=2
3527         tls_first_minor=22
3528         tls_as_opt="--fatal-warnings"
3529         ;;
3530   xtensa*-*-*)
3531     conftest_s='
3532         .section ".tdata","awT",@progbits
3533 foo:    .long   25
3534         .text
3535         movi    a8, foo@TLSFUNC
3536         movi    a10, foo@TLSARG
3537         callx8.tls a8, foo@TLSCALL'
3538         tls_first_major=2
3539         tls_first_minor=19
3540         ;;
3541 changequote([,])dnl
3542 esac
3543 set_have_as_tls=no
3544 if test "x$enable_tls" = xno ; then
3545   : # TLS explicitly disabled.
3546 elif test "x$enable_tls" = xyes ; then
3547   set_have_as_tls=yes # TLS explicitly enabled.
3548 elif test -z "$tls_first_major"; then
3549   : # If we don't have a check, assume no support.
3550 else
3551   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
3552   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
3553   [set_have_as_tls=yes])
3554 fi
3555 if test $set_have_as_tls = yes ; then
3556   AC_DEFINE(HAVE_AS_TLS, 1,
3557             [Define if your assembler and linker support thread-local storage.])
3558 fi
3559
3560 # Target-specific assembler checks.
3561
3562 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3563 gcc_cv_ld_static_dynamic=no
3564 gcc_cv_ld_static_option='-Bstatic'
3565 gcc_cv_ld_dynamic_option='-Bdynamic'
3566 if test $in_tree_ld = yes ; then
3567   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3568     gcc_cv_ld_static_dynamic=yes
3569   fi
3570 elif test x$gcc_cv_ld != x; then
3571   # Check if linker supports -Bstatic/-Bdynamic option
3572   if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
3573      && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
3574       gcc_cv_ld_static_dynamic=yes
3575   else
3576     case "$target" in
3577       # AIX ld uses -b flags
3578       *-*-aix4.[[23]]* | *-*-aix[[5-9]]*)
3579         gcc_cv_ld_static_dynamic=yes
3580         gcc_cv_ld_static_option="-bstatic"
3581         gcc_cv_ld_dynamic_option="-bdynamic"
3582         ;;
3583       # HP-UX ld uses -a flags to select between shared and archive.
3584       *-*-hpux*)
3585         if test x"$gnu_ld" = xno; then
3586           gcc_cv_ld_static_dynamic=yes
3587           gcc_cv_ld_static_option="-aarchive_shared"
3588           gcc_cv_ld_dynamic_option="-adefault"
3589         fi
3590         ;;
3591       # Solaris 2 ld always supports -Bstatic/-Bdynamic.
3592       *-*-solaris2*)
3593         gcc_cv_ld_static_dynamic=yes
3594         ;;
3595     esac
3596   fi
3597 fi
3598 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3599         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3600 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
3601         AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
3602 [Define to the linker option to disable use of shared objects.])
3603         AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
3604 [Define to the linker option to enable use of shared objects.])
3605 fi
3606 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3607
3608 if test x"$demangler_in_ld" = xyes; then
3609   AC_MSG_CHECKING(linker --demangle support)
3610   gcc_cv_ld_demangle=no
3611   if test $in_tree_ld = yes; then
3612     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3613       gcc_cv_ld_demangle=yes
3614     fi
3615   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3616     # Check if the GNU linker supports --demangle option
3617     if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
3618       gcc_cv_ld_demangle=yes
3619     fi
3620   fi
3621   if test x"$gcc_cv_ld_demangle" = xyes; then
3622     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3623 [Define if your linker supports --demangle option.])
3624   fi
3625   AC_MSG_RESULT($gcc_cv_ld_demangle)
3626 fi
3627
3628 AC_MSG_CHECKING(linker plugin support)
3629 gcc_cv_lto_plugin=0
3630 if test -f liblto_plugin.la; then
3631   save_ld_ver="$ld_ver"
3632   save_ld_vers_major="$ld_vers_major"
3633   save_ld_vers_minor="$ld_vers_minor"
3634   save_ld_is_gold="$ld_is_gold"
3635
3636   ld_is_gold=no
3637
3638   if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
3639     ld_ver="GNU ld"
3640     # FIXME: ld_is_gold?
3641     ld_vers_major="$gcc_cv_gld_major_version"
3642     ld_vers_minor="$gcc_cv_gld_minor_version"
3643   else
3644     # Determine plugin linker version.
3645     # FIXME: Partial duplicate from above, generalize.
3646 changequote(,)dnl
3647     ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
3648     if echo "$ld_ver" | grep GNU > /dev/null; then
3649       if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
3650         ld_is_gold=yes
3651         ld_vers=`echo $ld_ver | sed -n \
3652             -e 's,^[^)]*[        ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
3653       else
3654         ld_vers=`echo $ld_ver | sed -n \
3655             -e 's,^.*[   ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
3656       fi
3657       ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3658       ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3659     fi
3660 changequote([,])dnl
3661   fi
3662
3663   # Determine plugin support.
3664   if echo "$ld_ver" | grep GNU > /dev/null; then
3665     # Require GNU ld or gold 2.21+ for plugin support by default.
3666     if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
3667       gcc_cv_lto_plugin=2
3668     # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
3669     elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
3670       gcc_cv_lto_plugin=1
3671     fi
3672   fi
3673
3674   ld_ver="$save_ld_ver"
3675   ld_vers_major="$save_ld_vers_major"
3676   ld_vers_minor="$save_ld_vers_minor"
3677   ld_is_gold="$save_ld_is_gold"
3678 fi
3679 AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
3680   [Define to the level of your linker's plugin support.])
3681 AC_MSG_RESULT($gcc_cv_lto_plugin)
3682
3683 # Target OS-specific assembler checks.
3684
3685 case "$target_os" in
3686   darwin*)
3687     gcc_GAS_CHECK_FEATURE([-mmacosx-version-min option],
3688       gcc_cv_as_mmacosx_version_min,,
3689       [-mmacosx-version-min=10.1], [.text],,
3690       [AC_DEFINE(HAVE_AS_MMACOSX_VERSION_MIN_OPTION, 1,
3691         [Define if your Mac OS X assembler supports the -mmacos-version-min option.])])
3692     ;;
3693 esac
3694
3695 # Target CPU-specific assembler checks.
3696
3697 case "$target" in
3698   aarch64*-*-*)
3699     gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,,
3700                           [-mabi=lp64], [.text],,,)
3701     if test x$gcc_cv_as_aarch64_mabi = xyes; then
3702       AC_DEFINE(HAVE_AS_MABI_OPTION, 1,
3703                 [Define if your assembler supports the -mabi option.])
3704     else
3705       if test x$with_abi = xilp32; then
3706         AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3707                      Upgrade the Assembler.])
3708       fi
3709       if test x"$with_multilib_list" = xdefault; then
3710         TM_MULTILIB_CONFIG=lp64
3711       else
3712         aarch64_multilibs=`echo $with_multilib_list | sed -e 's/,/ /g'`
3713         for aarch64_multilib in ${aarch64_multilibs}; do
3714           case ${aarch64_multilib} in
3715             ilp32)
3716               AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3717                             Upgrade the Assembler.])
3718               ;;
3719             *)
3720               ;;
3721           esac
3722         done
3723       fi
3724     fi
3725     # Check if we have binutils support for relocations types needed by -fpic
3726     gcc_GAS_CHECK_FEATURE([-fpic relocs], gcc_cv_as_aarch64_picreloc,,,
3727     [
3728         .text
3729         ldr     x0, [[x2, #:gotpage_lo15:globalsym]]
3730     ],,[AC_DEFINE(HAVE_AS_SMALL_PIC_RELOCS, 1,
3731         [Define if your assembler supports relocs needed by -fpic.])])
3732     # Enable default workaround for AArch64 Cortex-A53 erratum 835769.
3733     AC_ARG_ENABLE(fix-cortex-a53-835769,
3734     [
3735 AS_HELP_STRING([--enable-fix-cortex-a53-835769],
3736         [enable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3737 AS_HELP_STRING([--disable-fix-cortex-a53-835769],
3738         [disable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3739     ],
3740       [
3741         case $enableval in
3742           yes)
3743             tm_defines="${tm_defines} TARGET_FIX_ERR_A53_835769_DEFAULT=1"
3744             ;;
3745           no)
3746             ;;
3747           *)
3748             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-835769.\
3749   Valid choices are 'yes' and 'no'.])
3750             ;;
3751
3752         esac
3753       ],
3754     [])
3755     # Enable default workaround for AArch64 Cortex-A53 erratum 843419.
3756     AC_ARG_ENABLE(fix-cortex-a53-843419,
3757     [
3758 AS_HELP_STRING([--enable-fix-cortex-a53-843419],
3759         [enable workaround for AArch64 Cortex-A53 erratum 843419 by default])
3760 AS_HELP_STRING([--disable-fix-cortex-a53-843419],
3761         [disable workaround for AArch64 Cortex-A53 erratum 843419 by default])
3762     ],
3763       [
3764         case $enableval in
3765           yes)
3766             tm_defines="${tm_defines} TARGET_FIX_ERR_A53_843419_DEFAULT=1"
3767             ;;
3768           no)
3769             ;;
3770           *)
3771             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-843419.\
3772   Valid choices are 'yes' and 'no'.])
3773             ;;
3774
3775         esac
3776       ],
3777     [])
3778     ;;
3779
3780   # All TARGET_ABI_OSF targets.
3781   alpha*-*-linux* | alpha*-*-*bsd*)
3782     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3783         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3784 [       .set nomacro
3785         .text
3786         extbl   $3, $2, $3      !lituse_bytoff!1
3787         ldq     $2, a($29)      !literal!1
3788         ldq     $4, b($29)      !literal!2
3789         ldq_u   $3, 0($2)       !lituse_base!1
3790         ldq     $27, f($29)     !literal!5
3791         jsr     $26, ($27), f   !lituse_jsr!5
3792         ldah    $29, 0($26)     !gpdisp!3
3793         lda     $0, c($29)      !gprel
3794         ldah    $1, d($29)      !gprelhigh
3795         lda     $1, d($1)       !gprellow
3796         lda     $29, 0($29)     !gpdisp!3],,
3797     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3798   [Define if your assembler supports explicit relocations.])])
3799     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3800         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3801 [       .set nomacro
3802         .text
3803         ldq     $27, a($29)     !literal!1
3804         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
3805     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3806   [Define if your assembler supports the lituse_jsrdirect relocation.])])
3807     ;;
3808
3809   avr-*-*)
3810     gcc_GAS_CHECK_FEATURE([--mlink-relax option], gcc_cv_as_avr_mlink_relax,,
3811       [--mlink-relax], [.text],,
3812       [AC_DEFINE(HAVE_AS_AVR_MLINK_RELAX_OPTION, 1,
3813                 [Define if your avr assembler supports --mlink-relax option.])])
3814
3815     gcc_GAS_CHECK_FEATURE([-mrmw option], gcc_cv_as_avr_mrmw,,
3816       [-mrmw], [.text],,
3817       [AC_DEFINE(HAVE_AS_AVR_MRMW_OPTION, 1,
3818                 [Define if your avr assembler supports -mrmw option.])])
3819     ;;
3820
3821   cris-*-*)
3822     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3823       gcc_cv_as_cris_no_mul_bug,[2,15,91],
3824       [-no-mul-bug-abort], [.text],,
3825       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3826                 [Define if your assembler supports the -no-mul-bug-abort option.])])
3827     ;;
3828
3829   sparc*-*-*)
3830     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3831       [.register %g2, #scratch],,
3832       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3833                 [Define if your assembler supports .register.])])
3834
3835     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3836       [-relax], [.text],,
3837       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3838                 [Define if your assembler supports -relax option.])])
3839
3840     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3841       gcc_cv_as_sparc_gotdata_op,,
3842       [-K PIC],
3843 [.text
3844 .align 4
3845 foo:
3846         nop
3847 bar:
3848         sethi %gdop_hix22(foo), %g1
3849         xor    %g1, %gdop_lox10(foo), %g1
3850         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
3851       [if test x$gcc_cv_ld != x \
3852        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3853          if test x$gcc_cv_objdump != x; then
3854            if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3855               | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3856                gcc_cv_as_sparc_gotdata_op=no
3857            else
3858                gcc_cv_as_sparc_gotdata_op=yes
3859            fi
3860          fi
3861        fi
3862        rm -f conftest],
3863       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3864                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3865
3866     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3867       gcc_cv_as_sparc_ua_pcrel,,
3868       [-K PIC],
3869 [.text
3870 foo:
3871         nop
3872 .data
3873 .align 4
3874 .byte 0
3875 .uaword %r_disp32(foo)],
3876       [if test x$gcc_cv_ld != x \
3877        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3878          gcc_cv_as_sparc_ua_pcrel=yes
3879        fi
3880        rm -f conftest],
3881       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3882                 [Define if your assembler and linker support unaligned PC relative relocs.])
3883
3884       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3885         gcc_cv_as_sparc_ua_pcrel_hidden,,
3886         [-K PIC],
3887 [.data
3888 .align 4
3889 .byte 0x31
3890 .uaword %r_disp32(foo)
3891 .byte 0x32, 0x33, 0x34
3892 .global foo
3893 .hidden foo
3894 foo:
3895 .skip 4],
3896         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3897          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3898          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3899             | grep ' 31000000 07323334' > /dev/null 2>&1; then
3900             if $gcc_cv_objdump -R conftest 2> /dev/null \
3901                | grep 'DISP32' > /dev/null 2>&1; then
3902                 :
3903             else
3904                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3905             fi
3906          fi
3907          rm -f conftest],
3908          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3909                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3910     ]) # unaligned pcrel relocs
3911
3912     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3913       gcc_cv_as_sparc_offsetable_lo10,,
3914       [-xarch=v9],
3915 [.text
3916         or %g1, %lo(ab) + 12, %g1
3917         or %g1, %lo(ab + 12), %g1],
3918       [if test x$gcc_cv_objdump != x \
3919        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3920           | grep ' 82106000 82106000' > /dev/null 2>&1; then
3921          gcc_cv_as_sparc_offsetable_lo10=yes
3922        fi],
3923        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3924                  [Define if your assembler supports offsetable %lo().])])
3925
3926     gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
3927       gcc_cv_as_sparc_fmaf,,
3928       [-xarch=v9d],
3929       [.text
3930        .register %g2, #scratch
3931        .register %g3, #scratch
3932        .align 4
3933        fmaddd %f0, %f2, %f4, %f6
3934        addxccc %g1, %g2, %g3
3935        fsrl32 %f2, %f4, %f8
3936        fnaddd %f10, %f12, %f14],,
3937       [AC_DEFINE(HAVE_AS_FMAF_HPC_VIS3, 1,
3938                 [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])
3939
3940     gcc_GAS_CHECK_FEATURE([SPARC4 instructions],
3941       gcc_cv_as_sparc_sparc4,,
3942       [-xarch=sparc4],
3943       [.text
3944        .register %g2, #scratch
3945        .register %g3, #scratch
3946        .align 4
3947        cxbe %g2, %g3, 1f
3948 1:     cwbneg %g2, %g3, 1f
3949 1:     sha1
3950        md5
3951        aes_kexpand0 %f4, %f6, %f8
3952        des_round %f38, %f40, %f42, %f44
3953        camellia_f %f54, %f56, %f58, %f60
3954        kasumi_fi_xor %f46, %f48, %f50, %f52],,
3955       [AC_DEFINE(HAVE_AS_SPARC4, 1,
3956                 [Define if your assembler supports SPARC4 instructions.])])
3957
3958     gcc_GAS_CHECK_FEATURE([SPARC5 and VIS 4.0 instructions],
3959       gcc_cv_as_sparc_sparc5,,
3960       [-xarch=sparc5],
3961       [.text
3962        .register %g2, #scratch
3963        .register %g3, #scratch
3964        .align 4
3965        subxc %g1, %g2, %g3
3966        fpadd8 %f0, %f2, %f4],,
3967       [AC_DEFINE(HAVE_AS_SPARC5_VIS4, 1,
3968                 [Define if your assembler supports SPARC5 and VIS 4.0 instructions.])])
3969
3970     gcc_GAS_CHECK_FEATURE([LEON instructions],
3971       gcc_cv_as_sparc_leon,,
3972       [-Aleon],
3973       [.text
3974        .register %g2, #scratch
3975        .register %g3, #scratch
3976        .align 4
3977        smac %g2, %g3, %g1
3978        umac %g2, %g3, %g1
3979        casa [[%g2]] 0xb, %g3, %g1],,
3980       [AC_DEFINE(HAVE_AS_LEON, 1,
3981                 [Define if your assembler supports LEON instructions.])])
3982     ;;
3983
3984 changequote(,)dnl
3985   i[34567]86-*-* | x86_64-*-*)
3986 changequote([,])dnl
3987     case $target_os in
3988       cygwin*)
3989         # Full C++ conformance when using a shared libstdc++-v3 requires some
3990         # support from the Cygwin DLL, which in more recent versions exports
3991         # wrappers to aid in interposing and redirecting operators new, delete,
3992         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
3993         # are configuring for a version of Cygwin that exports the wrappers.
3994         if test x$host = x$target && test x$host_cpu = xi686; then
3995           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3996         else
3997           # Can't check presence of libc functions during cross-compile, so
3998           # we just have to assume we're building for an up-to-date target.
3999           gcc_ac_cygwin_dll_wrappers=yes
4000         fi
4001         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
4002           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
4003           [Define if you want to generate code by default that assumes that the
4004            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
4005     esac
4006     case $target_os in
4007       cygwin* | pe | mingw32*)
4008         # Recent binutils allows the three-operand form of ".comm" on PE.  This
4009         # definition is used unconditionally to initialise the default state of
4010         # the target option variable that governs usage of the feature.
4011         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
4012          [2,19,52],,[.comm foo,1,32])
4013         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
4014           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
4015           [Define if your assembler supports specifying the alignment
4016            of objects allocated using the GAS .comm command.])
4017         # Used for DWARF 2 in PE
4018         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
4019           gcc_cv_as_ix86_pe_secrel32,
4020           [2,15,91],,
4021 [.text
4022 foo:    nop
4023 .data
4024         .secrel32 foo],
4025           [if test x$gcc_cv_ld != x \
4026            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
4027              gcc_cv_as_ix86_pe_secrel32=yes
4028            fi
4029            rm -f conftest],
4030           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
4031             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
4032         # Test if the assembler supports the extended form of the .section
4033         # directive that specifies section alignment.  LTO support uses this,
4034         # but normally only after installation, so we warn but don't fail the
4035         # configure if LTO is enabled but the assembler does not support it.
4036         gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
4037           [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
4038         if test x$gcc_cv_as_section_has_align != xyes; then
4039           case ",$enable_languages," in
4040             *,lto,*)
4041               AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
4042               ;;
4043           esac
4044         fi
4045         ;;
4046     esac
4047
4048     # Test if the assembler supports the section flag 'e' for specifying
4049     # an excluded section.
4050     gcc_GAS_CHECK_FEATURE([.section with e], gcc_cv_as_section_has_e,
4051       [2,22,51], [--fatal-warnings],
4052 [.section foo1,"e"
4053 .byte 0,0,0,0])
4054     AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_EXCLUDE,
4055       [`if test $gcc_cv_as_section_has_e = yes; then echo 1; else echo 0; fi`],
4056       [Define if your assembler supports specifying the section flag e.])
4057
4058     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
4059        gcc_cv_as_ix86_filds,,,
4060        [filds (%ebp); fists (%ebp)],,
4061        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
4062          [Define if your assembler uses filds and fists mnemonics.])])
4063
4064     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
4065        gcc_cv_as_ix86_fildq,,,
4066        [fildq (%ebp); fistpq (%ebp)],,
4067        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
4068          [Define if your assembler uses fildq and fistq mnemonics.])])
4069
4070     gcc_GAS_CHECK_FEATURE([cmov syntax],
4071       gcc_cv_as_ix86_cmov_sun_syntax,,,
4072       [cmovl.l %edx, %eax],,
4073       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
4074         [Define if your assembler supports the Sun syntax for cmov.])])
4075
4076     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
4077       gcc_cv_as_ix86_ffreep,,,
4078       [ffreep %st(1)],,
4079       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
4080         [Define if your assembler supports the ffreep mnemonic.])])
4081
4082     gcc_GAS_CHECK_FEATURE([.quad directive],
4083       gcc_cv_as_ix86_quad,,,
4084       [.quad 0],,
4085       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
4086         [Define if your assembler supports the .quad directive.])])
4087
4088     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
4089       gcc_cv_as_ix86_sahf,,,
4090       [.code64
4091        sahf],,
4092       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
4093         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
4094
4095     gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
4096       gcc_cv_as_ix86_interunit_movq,,,
4097       [.code64
4098        movq %mm0, %rax
4099        movq %rax, %xmm0])
4100     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_INTERUNIT_MOVQ,
4101       [`if test $gcc_cv_as_ix86_interunit_movq = yes; then echo 1; else echo 0; fi`],
4102       [Define if your assembler supports interunit movq mnemonic.])
4103
4104     gcc_GAS_CHECK_FEATURE([hle prefixes],
4105       gcc_cv_as_ix86_hle,,,
4106       [lock xacquire cmpxchg %esi, (%ecx)],,
4107       [AC_DEFINE(HAVE_AS_IX86_HLE, 1,
4108         [Define if your assembler supports HLE prefixes.])])
4109
4110     gcc_GAS_CHECK_FEATURE([swap suffix],
4111       gcc_cv_as_ix86_swap,,,
4112       [movl.s %esp, %ebp],,
4113       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
4114         [Define if your assembler supports the swap suffix.])])
4115
4116     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
4117       gcc_cv_as_ix86_diff_sect_delta,,,
4118       [.section .rodata
4119 .L1:
4120         .long .L2-.L1
4121         .long .L3-.L1
4122         .text
4123 .L3:    nop
4124 .L2:    nop],,
4125       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
4126         [Define if your assembler supports the subtraction of symbols in different sections.])])
4127
4128     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
4129         gcc_cv_as_ix86_rep_lock_prefix,,,
4130         [rep movsl
4131          rep ret
4132          rep nop
4133          rep bsf %ecx, %eax
4134          rep bsr %ecx, %eax
4135          lock addl %edi, (%eax,%esi)
4136          lock orl $0, (%esp)],,
4137         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
4138           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
4139
4140     gcc_GAS_CHECK_FEATURE([ud2 mnemonic],
4141         gcc_cv_as_ix86_ud2,,,
4142         [ud2],,
4143       [AC_DEFINE(HAVE_AS_IX86_UD2, 1,
4144         [Define if your assembler supports the 'ud2' mnemonic.])])
4145
4146     # Enforce 32-bit output with gas and gld.
4147     if test x$gas = xyes; then
4148       as_ix86_gas_32_opt="--32"
4149     fi
4150     if echo "$ld_ver" | grep GNU > /dev/null; then
4151       if $gcc_cv_ld -V 2>/dev/null | grep elf_i386_sol2 > /dev/null; then
4152         ld_ix86_gld_32_opt="-melf_i386_sol2"
4153       else
4154         ld_ix86_gld_32_opt="-melf_i386"
4155       fi
4156     fi
4157
4158     gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
4159         gcc_cv_as_ix86_tlsgdplt,,
4160         [$as_ix86_gas_32_opt],
4161         [call    tls_gd@tlsgdplt],
4162         [if test x$gcc_cv_ld != x \
4163          && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4164            gcc_cv_as_ix86_tlsgdplt=yes
4165          fi
4166          rm -f conftest],
4167       [AC_DEFINE(HAVE_AS_IX86_TLSGDPLT, 1,
4168         [Define if your assembler and linker support @tlsgdplt.])])
4169
4170     conftest_s='
4171         .section .tdata,"aw'$tls_section_flag'",@progbits
4172 tls_ld:
4173         .section .text,"ax",@progbits
4174          call    tls_ld@tlsldmplt'
4175
4176     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
4177         gcc_cv_as_ix86_tlsldmplt,,
4178         [$as_ix86_gas_32_opt],
4179         [$conftest_s],
4180         [if test x$gcc_cv_ld != x \
4181          && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4182            gcc_cv_as_ix86_tlsldmplt=yes
4183          fi
4184          rm -f conftest])
4185     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDMPLT,
4186       [`if test $gcc_cv_as_ix86_tlsldmplt = yes; then echo 1; else echo 0; fi`],
4187       [Define to 1 if your assembler and linker support @tlsldmplt.])
4188
4189     conftest_s='
4190         .section .text,"ax",@progbits
4191         .globl  _start
4192         .type   _start, @function
4193 _start:
4194         leal    value@tlsldm(%ebx), %eax
4195         call    ___tls_get_addr@plt
4196
4197         .section .tdata,"aw'$tls_section_flag'",@progbits
4198         .type   value, @object
4199 value:'
4200     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM reloc],
4201         gcc_cv_as_ix86_tlsldm,,
4202         [$as_ix86_gas_32_opt],
4203         [$conftest_s],
4204         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4205             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o $ld_tls_libs -lc > /dev/null 2>&1; then
4206            if $gcc_cv_objdump -d conftest 2>/dev/null | grep nop > /dev/null \
4207               || dis conftest 2>/dev/null | grep nop > /dev/null; then
4208              gcc_cv_as_ix86_tlsldm=yes
4209            fi
4210          fi
4211          rm -f conftest])
4212     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDM,
4213       [`if test $gcc_cv_as_ix86_tlsldm = yes; then echo 1; else echo 0; fi`],
4214       [Define to 1 if your assembler and linker support @tlsldm.])
4215
4216     conftest_s='
4217         .data
4218 bar:
4219         .byte 1
4220         .text
4221         .global _start
4222 _start:
4223          cmpl $0, bar@GOT
4224          jmp *_start@GOT'
4225     gcc_GAS_CHECK_FEATURE([R_386_GOT32X reloc],
4226         gcc_cv_as_ix86_got32x,,
4227         [$as_ix86_gas_32_opt],
4228         [$conftest_s],
4229         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4230             && test x$gcc_cv_readelf != x \
4231             && $gcc_cv_readelf --relocs --wide conftest.o 2>&1 \
4232                | grep R_386_GOT32X > /dev/null 2>&1 \
4233             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4234            if $gcc_cv_objdump -dw conftest 2>&1 \
4235               | grep 0xffffff > /dev/null 2>&1; then
4236              gcc_cv_as_ix86_got32x=no
4237            else
4238              gcc_cv_as_ix86_got32x=yes
4239            fi
4240          fi
4241          rm -f conftest])
4242     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_GOT32X,
4243       [`if test x"$gcc_cv_as_ix86_got32x" = xyes; then echo 1; else echo 0; fi`],
4244       [Define 0/1 if your assembler and linker support @GOT.])
4245
4246     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
4247       gcc_cv_as_ix86_gotoff_in_data, [2,11,0],
4248       [$as_ix86_gas_32_opt],
4249 [       .text
4250 .L0:
4251         nop
4252         .data
4253         .long .L0@GOTOFF])
4254     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
4255       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
4256       [Define true if the assembler supports '.long foo@GOTOFF'.])
4257
4258     conftest_s='
4259         .section .text,"ax",@progbits
4260         .globl  _start
4261         .type   _start, @function
4262 _start:
4263         leal    ld@tlsldm(%ecx), %eax
4264         call    *___tls_get_addr@GOT(%ecx)
4265         leal    gd@tlsgd(%ecx), %eax
4266         call    *___tls_get_addr@GOT(%ecx)
4267
4268         .section .tdata,"aw'$tls_section_flag'",@progbits
4269         .type   ld, @object
4270 ld:
4271         .byte 0
4272         .globl  gd
4273         .type   gd, @object
4274 gd:
4275         .byte 0'
4276     gcc_GAS_CHECK_FEATURE([calling ___tls_get_addr via GOT],
4277         gcc_cv_as_ix86_tls_get_addr_via_got,,
4278         [$as_ix86_gas_32_opt],
4279         [$conftest_s],
4280         [if test x$gcc_cv_ld != x \
4281             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4282            gcc_cv_as_ix86_tls_get_addr_via_got=yes
4283          fi
4284          rm -f conftest])
4285     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLS_GET_ADDR_GOT,
4286       [`if test x"$gcc_cv_as_ix86_tls_get_addr_via_got" = xyes; then echo 1; else echo 0; fi`],
4287       [Define 0/1 if your assembler and linker support calling ___tls_get_addr via GOT.])
4288     ;;
4289
4290   ia64*-*-*)
4291     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
4292         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
4293 [       .text
4294         addl r15 = @ltoffx(x#), gp
4295         ;;
4296         ld8.mov r16 = [[r15]], x#],,
4297     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
4298           [Define if your assembler supports ltoffx and ldxmov relocations.])])
4299
4300     ;;
4301
4302   powerpc*-*-*)
4303
4304     case $target in
4305       *-*-darwin*)
4306         gcc_GAS_CHECK_FEATURE([.machine directive support],
4307           gcc_cv_as_machine_directive,,,
4308           [     .machine ppc7400])
4309         if test x$gcc_cv_as_machine_directive != xyes; then
4310           echo "*** This target requires an assembler supporting \".machine\"" >&2
4311           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
4312           test x$build = x$target && exit 1
4313         fi
4314         ;;
4315     esac
4316
4317     case $target in
4318       *-*-aix*) conftest_s='    .machine "pwr5"
4319         .csect .text[[PR]]
4320         mfcr 3,128';;
4321       *-*-darwin*) conftest_s=' .text
4322         mfcr r3,128';;
4323       *) conftest_s='   .machine power4
4324         .text
4325         mfcr 3,128';;
4326     esac
4327
4328     gcc_GAS_CHECK_FEATURE([mfcr field support],
4329       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
4330       [$conftest_s],,
4331       [AC_DEFINE(HAVE_AS_MFCRF, 1,
4332           [Define if your assembler supports mfcr field.])])
4333
4334     case $target in
4335       *-*-aix*) conftest_s='    .machine "pwr5"
4336         .csect .text[[PR]]
4337         popcntb 3,3';;
4338       *) conftest_s='   .machine power5
4339         .text
4340         popcntb 3,3';;
4341     esac
4342
4343     gcc_GAS_CHECK_FEATURE([popcntb support],
4344       gcc_cv_as_powerpc_popcntb, [2,17,0],,
4345       [$conftest_s],,
4346       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
4347           [Define if your assembler supports popcntb field.])])
4348
4349     case $target in
4350       *-*-aix*) conftest_s='    .machine "pwr5x"
4351         .csect .text[[PR]]
4352         frin 1,1';;
4353       *) conftest_s='   .machine power5
4354         .text
4355         frin 1,1';;
4356     esac
4357
4358     gcc_GAS_CHECK_FEATURE([fp round support],
4359       gcc_cv_as_powerpc_fprnd, [2,17,0],,
4360       [$conftest_s],,
4361       [AC_DEFINE(HAVE_AS_FPRND, 1,
4362           [Define if your assembler supports fprnd.])])
4363
4364     case $target in
4365       *-*-aix*) conftest_s='    .machine "pwr6"
4366         .csect .text[[PR]]
4367         mffgpr 1,3';;
4368       *) conftest_s='   .machine power6
4369         .text
4370         mffgpr 1,3';;
4371     esac
4372
4373     gcc_GAS_CHECK_FEATURE([move fp gpr support],
4374       gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
4375       [$conftest_s],,
4376       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
4377           [Define if your assembler supports mffgpr and mftgpr.])])
4378
4379     case $target in
4380       *-*-aix*) conftest_s='    .csect .text[[PR]]
4381 LCF..0:
4382         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
4383       *-*-darwin*)
4384         conftest_s='    .text
4385 LCF0:
4386         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
4387       *) conftest_s='   .text
4388 .LCF0:
4389         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
4390     esac
4391
4392     gcc_GAS_CHECK_FEATURE([rel16 relocs],
4393       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
4394       [$conftest_s],,
4395       [AC_DEFINE(HAVE_AS_REL16, 1,
4396           [Define if your assembler supports R_PPC_REL16 relocs.])])
4397
4398     case $target in
4399       *-*-aix*) conftest_s='    .machine "pwr6"
4400         .csect .text[[PR]]
4401         cmpb 3,4,5';;
4402       *) conftest_s='   .machine power6
4403         .text
4404         cmpb 3,4,5';;
4405     esac
4406
4407     gcc_GAS_CHECK_FEATURE([compare bytes support],
4408       gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
4409       [$conftest_s],,
4410       [AC_DEFINE(HAVE_AS_CMPB, 1,
4411           [Define if your assembler supports cmpb.])])
4412
4413     case $target in
4414       *-*-aix*) conftest_s='    .machine "pwr6"
4415         .csect .text[[PR]]
4416         dadd 1,2,3';;
4417       *) conftest_s='   .machine power6
4418         .text
4419         dadd 1,2,3';;
4420     esac
4421
4422     gcc_GAS_CHECK_FEATURE([decimal float support],
4423       gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
4424       [$conftest_s],,
4425       [AC_DEFINE(HAVE_AS_DFP, 1,
4426           [Define if your assembler supports DFP instructions.])])
4427
4428     case $target in
4429       *-*-aix*) conftest_s='    .machine "pwr7"
4430         .csect .text[[PR]]
4431         lxvd2x 1,2,3';;
4432       *) conftest_s='   .machine power7
4433         .text
4434         lxvd2x 1,2,3';;
4435     esac
4436
4437     gcc_GAS_CHECK_FEATURE([vector-scalar support],
4438       gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
4439       [$conftest_s],,
4440       [AC_DEFINE(HAVE_AS_VSX, 1,
4441           [Define if your assembler supports VSX instructions.])])
4442
4443     case $target in
4444       *-*-aix*) conftest_s='    .machine "pwr7"
4445         .csect .text[[PR]]
4446         popcntd 3,3';;
4447       *) conftest_s='   .machine power7
4448         .text
4449         popcntd 3,3';;
4450     esac
4451
4452     gcc_GAS_CHECK_FEATURE([popcntd support],
4453       gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
4454       [$conftest_s],,
4455       [AC_DEFINE(HAVE_AS_POPCNTD, 1,
4456           [Define if your assembler supports POPCNTD instructions.])])
4457
4458     case $target in
4459       *-*-aix*) conftest_s='    .machine "pwr8"
4460         .csect .text[[PR]]';;
4461       *) conftest_s='   .machine power8
4462         .text';;
4463     esac
4464
4465     gcc_GAS_CHECK_FEATURE([power8 support],
4466       gcc_cv_as_powerpc_power8, [2,19,2], -a32,
4467       [$conftest_s],,
4468       [AC_DEFINE(HAVE_AS_POWER8, 1,
4469           [Define if your assembler supports POWER8 instructions.])])
4470
4471     case $target in
4472       *-*-aix*) conftest_s='    .machine "pwr9"
4473         .csect .text[[PR]]';;
4474       *) conftest_s='   .machine power9
4475         .text';;
4476     esac
4477
4478     gcc_GAS_CHECK_FEATURE([power9 support],
4479       gcc_cv_as_powerpc_power9, [2,19,2], -a32,
4480       [$conftest_s],,
4481       [AC_DEFINE(HAVE_AS_POWER9, 1,
4482           [Define if your assembler supports POWER9 instructions.])])
4483
4484     case $target in
4485       *-*-aix*) conftest_s='    .csect .text[[PR]]
4486         lwsync';;
4487       *) conftest_s='   .text
4488         lwsync';;
4489     esac
4490
4491     gcc_GAS_CHECK_FEATURE([lwsync support],
4492       gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
4493       [$conftest_s],,
4494       [AC_DEFINE(HAVE_AS_LWSYNC, 1,
4495           [Define if your assembler supports LWSYNC instructions.])])
4496
4497     case $target in
4498       *-*-aix*) conftest_s='    .machine "476"
4499         .csect .text[[PR]]
4500         dci 0';;
4501       *) conftest_s='   .machine "476"
4502         .text
4503         dci 0';;
4504     esac
4505
4506     gcc_GAS_CHECK_FEATURE([data cache invalidate support],
4507       gcc_cv_as_powerpc_dci, [9,99,0], -a32,
4508       [$conftest_s],,
4509       [AC_DEFINE(HAVE_AS_DCI, 1,
4510           [Define if your assembler supports the DCI/ICI instructions.])])
4511
4512     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4513       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
4514       [.gnu_attribute 4,1],,
4515       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4516           [Define if your assembler supports .gnu_attribute.])])
4517
4518     gcc_GAS_CHECK_FEATURE([tls marker support],
4519       gcc_cv_as_powerpc_tls_markers, [2,20,0],,
4520       [ bl __tls_get_addr(x@tlsgd)],,
4521       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
4522           [Define if your assembler supports arg info for __tls_get_addr.])])
4523
4524     gcc_GAS_CHECK_FEATURE([prologue entry point marker support],
4525       gcc_cv_as_powerpc_entry_markers, [2,26,0],-a64 --fatal-warnings,
4526       [ .reloc .,R_PPC64_ENTRY; nop],,
4527       [AC_DEFINE(HAVE_AS_ENTRY_MARKERS, 1,
4528           [Define if your assembler supports the R_PPC64_ENTRY relocation.])])
4529
4530     case $target in
4531       *-*-aix*)
4532         gcc_GAS_CHECK_FEATURE([AIX .ref support],
4533           gcc_cv_as_aix_ref, [2,21,0],,
4534           [     .csect stuff[[rw]]
4535              stuff:
4536                 .long 1
4537                 .extern sym
4538                 .ref sym
4539           ],,
4540           [AC_DEFINE(HAVE_AS_REF, 1,
4541             [Define if your assembler supports .ref])])
4542
4543         gcc_GAS_CHECK_FEATURE([AIX DWARF location lists section support],
4544           gcc_cv_as_aix_dwloc, [2,21,0],,
4545           [     .dwsect 0xA0000
4546         Lframe..0:
4547                 .vbyte 4,Lframe..0
4548           ],,
4549           [AC_DEFINE(HAVE_XCOFF_DWARF_EXTRAS, 1,
4550             [Define if your assembler supports AIX debug frame section label reference.])])
4551         ;;
4552     esac
4553     ;;
4554
4555   mips*-*-*)
4556     gcc_GAS_CHECK_FEATURE([explicit relocation support],
4557       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
4558 [       lw $4,%gp_rel(foo)($4)],,
4559       [if test x$target_cpu_default = x
4560        then target_cpu_default=MASK_EXPLICIT_RELOCS
4561        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
4562        fi])
4563
4564     gcc_GAS_CHECK_FEATURE([-mno-shared support],
4565       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
4566       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
4567                  [Define if the assembler understands -mno-shared.])])
4568
4569     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4570       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
4571       [.gnu_attribute 4,1],,
4572       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4573           [Define if your assembler supports .gnu_attribute.])])
4574
4575     gcc_GAS_CHECK_FEATURE([.module support],
4576       gcc_cv_as_mips_dot_module,,[-32],
4577       [.module mips2
4578        .module fp=xx],,
4579       [AC_DEFINE(HAVE_AS_DOT_MODULE, 1,
4580           [Define if your assembler supports .module.])])
4581     if test x$gcc_cv_as_mips_dot_module = xno \
4582        && test x$with_fp_32 != x; then
4583       AC_MSG_ERROR(
4584         [Requesting --with-fp-32= requires assembler support for .module.])
4585     fi
4586
4587     gcc_GAS_CHECK_FEATURE([.micromips support],
4588       gcc_cv_as_micromips_support,,[--fatal-warnings],
4589       [.set micromips],,
4590       [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
4591           [Define if your assembler supports the .set micromips directive])])
4592
4593     gcc_GAS_CHECK_FEATURE([.dtprelword support],
4594       gcc_cv_as_mips_dtprelword, [2,18,0],,
4595       [.section .tdata,"awT",@progbits
4596 x:
4597         .word 2
4598         .text
4599         .dtprelword x+0x8000],,
4600       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
4601           [Define if your assembler supports .dtprelword.])])
4602
4603     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
4604       gcc_cv_as_mips_dspr1_mult,,,
4605 [       .set    mips32r2
4606         .set    nodspr2
4607         .set    dsp
4608         madd    $ac3,$4,$5
4609         maddu   $ac3,$4,$5
4610         msub    $ac3,$4,$5
4611         msubu   $ac3,$4,$5
4612         mult    $ac3,$4,$5
4613         multu   $ac3,$4,$5],,
4614       [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
4615           [Define if your assembler supports DSPR1 mult.])])
4616
4617     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
4618     gcc_cv_as_ld_jalr_reloc=no
4619     if test $gcc_cv_as_mips_explicit_relocs = yes; then
4620       if test $in_tree_ld = yes ; then
4621         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
4622            && test $in_tree_ld_is_elf = yes; then
4623           gcc_cv_as_ld_jalr_reloc=yes
4624         fi
4625       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
4626         echo '  .ent x' > conftest.s
4627         echo 'x:        lw $2,%got_disp(y)($3)' >> conftest.s
4628         echo '  lw $25,%call16(y)($28)' >> conftest.s
4629         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
4630         echo '1:        jalr $25' >> conftest.s
4631         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
4632         echo '1:        jalr $25' >> conftest.s
4633         echo '  .end x' >> conftest.s
4634         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
4635            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
4636           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
4637              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
4638             gcc_cv_as_ld_jalr_reloc=yes
4639           fi
4640         fi
4641         rm -f conftest.*
4642       fi
4643     fi
4644     if test $gcc_cv_as_ld_jalr_reloc = yes; then
4645       if test x$target_cpu_default = x; then
4646         target_cpu_default=MASK_RELAX_PIC_CALLS
4647       else
4648         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
4649       fi
4650     fi
4651     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
4652
4653     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
4654       [gcc_cv_ld_mips_personality_relaxation],
4655       [gcc_cv_ld_mips_personality_relaxation=no
4656        if test $in_tree_ld = yes ; then
4657          if test "$gcc_cv_gld_major_version" -eq 2 \
4658                  -a "$gcc_cv_gld_minor_version" -ge 21 \
4659                  -o "$gcc_cv_gld_major_version" -gt 2; then
4660            gcc_cv_ld_mips_personality_relaxation=yes
4661          fi
4662        elif test x$gcc_cv_as != x \
4663                  -a x$gcc_cv_ld != x \
4664                  -a x$gcc_cv_readelf != x ; then
4665          cat > conftest.s <<EOF
4666         .cfi_startproc
4667         .cfi_personality 0x80,indirect_ptr
4668         .ent test
4669 test:
4670         nop
4671         .end test
4672         .cfi_endproc
4673
4674         .section .data,"aw",@progbits
4675 indirect_ptr:
4676         .dc.a personality
4677 EOF
4678          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
4679             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
4680            if $gcc_cv_readelf -d conftest 2>&1 \
4681               | grep TEXTREL > /dev/null 2>&1; then
4682              :
4683            elif $gcc_cv_readelf --relocs conftest 2>&1 \
4684                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
4685              :
4686            else
4687              gcc_cv_ld_mips_personality_relaxation=yes
4688            fi
4689          fi
4690        fi
4691        rm -f conftest.s conftest.o conftest])
4692     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
4693             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
4694       [Define if your linker can relax absolute .eh_frame personality
4695 pointers into PC-relative form.])
4696     fi
4697
4698     gcc_GAS_CHECK_FEATURE([-mnan= support],
4699       gcc_cv_as_mips_nan,,
4700       [-mnan=2008],,,
4701       [AC_DEFINE(HAVE_AS_NAN, 1,
4702                  [Define if the assembler understands -mnan=.])])
4703     if test x$gcc_cv_as_mips_nan = xno \
4704        && test x$with_nan != x; then
4705       AC_MSG_ERROR(
4706         [Requesting --with-nan= requires assembler support for -mnan=])
4707     fi
4708     ;;
4709     s390*-*-*)
4710     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4711       gcc_cv_as_s390_gnu_attribute, [2,18,0],,
4712       [.gnu_attribute 8,1],,
4713       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4714           [Define if your assembler supports .gnu_attribute.])])
4715     gcc_GAS_CHECK_FEATURE([.machine and .machinemode support],
4716       gcc_cv_as_s390_machine_machinemode, [2,24,0],,
4717       [ .machinemode push
4718         .machinemode pop
4719         .machine push
4720         .machine pop],,
4721       [AC_DEFINE(HAVE_AS_MACHINE_MACHINEMODE, 1,
4722           [Define if your assembler supports .machine and .machinemode.])])
4723     gcc_GAS_CHECK_FEATURE([architecture modifiers support],
4724       gcc_cv_as_s390_architecture_modifiers, [2,26,0],,
4725       [ .machine z13+vx ],,
4726       [AC_DEFINE(HAVE_AS_ARCHITECTURE_MODIFIERS, 1,
4727           [Define if your assembler supports architecture modifiers.])])
4728     ;;
4729 esac
4730
4731 # Mips and HP-UX need the GNU assembler.
4732 # Linux on IA64 might be able to use the Intel assembler.
4733
4734 case "$target" in
4735   mips*-*-* | *-*-hpux* )
4736     if test x$gas_flag = xyes \
4737        || test x"$host" != x"$build" \
4738        || test ! -x "$gcc_cv_as" \
4739        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
4740       :
4741     else
4742       echo "*** This configuration requires the GNU assembler" >&2
4743       exit 1
4744     fi
4745     ;;
4746 esac
4747
4748 # ??? Not all targets support dwarf2 debug_line, even within a version
4749 # of gas.  Moreover, we need to emit a valid instruction to trigger any
4750 # info to the output file.  So, as supported targets are added to gas 2.11,
4751 # add some instruction here to (also) show we expect this might work.
4752 # ??? Once 2.11 is released, probably need to add first known working
4753 # version to the per-target configury.
4754 case "$cpu_type" in
4755   aarch64 | alpha | arm | avr | bfin | cris | i386 | m32c | m68k | microblaze \
4756   | mips | nios2 | pa | riscv | rs6000 | score | sparc | spu | tilegx \
4757   | tilepro | visium | xstormy16 | xtensa)
4758     insn="nop"
4759     ;;
4760   ia64 | s390)
4761     insn="nop 0"
4762     ;;
4763   mmix)
4764     insn="swym 0"
4765     ;;
4766 esac
4767 if test x"$insn" != x; then
4768  conftest_s="\
4769         .file 1 \"conftest.s\"
4770         .loc 1 3 0
4771         $insn"
4772  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
4773   gcc_cv_as_dwarf2_debug_line,
4774   [elf,2,11,0],, [$conftest_s],
4775   [if test x$gcc_cv_objdump != x \
4776    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
4777       | grep debug_line > /dev/null 2>&1; then
4778      gcc_cv_as_dwarf2_debug_line=yes
4779    fi])
4780
4781 # The .debug_line file table must be in the exact order that
4782 # we specified the files, since these indices are also used
4783 # by DW_AT_decl_file.  Approximate this test by testing if
4784 # the assembler bitches if the same index is assigned twice.
4785  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
4786   gcc_cv_as_dwarf2_file_buggy,,,
4787 [       .file 1 "foo.s"
4788         .file 1 "bar.s"])
4789
4790  if test $gcc_cv_as_dwarf2_debug_line = yes \
4791  && test $gcc_cv_as_dwarf2_file_buggy = no; then
4792         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
4793   [Define if your assembler supports dwarf2 .file/.loc directives,
4794    and preserves file table indices exactly as given.])
4795  fi
4796
4797  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
4798   gcc_cv_as_gdwarf2_flag,
4799   [elf,2,11,0], [--gdwarf2], [$insn],,
4800   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
4801 [Define if your assembler supports the --gdwarf2 option.])])
4802
4803  gcc_GAS_CHECK_FEATURE([--gstabs option],
4804   gcc_cv_as_gstabs_flag,
4805   [elf,2,11,0], [--gstabs], [$insn],,
4806   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
4807 [Define if your assembler supports the --gstabs option.])])
4808
4809  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
4810   gcc_cv_as_debug_prefix_map_flag,
4811   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
4812   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
4813 [Define if your assembler supports the --debug-prefix-map option.])])
4814 fi
4815
4816 gcc_GAS_CHECK_FEATURE([compressed debug sections],
4817   gcc_cv_as_compress_debug,,,,
4818   [# gas compiled without zlib cannot compress debug sections and warns
4819    # about it, but still exits successfully.  So check for this, too.
4820    if $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null
4821    then
4822      gcc_cv_as_compress_debug=0
4823    # Since binutils 2.26, gas supports --compress-debug-sections=type,
4824    # defaulting to the ELF gABI format.
4825    elif $gcc_cv_as --compress-debug-sections=zlib-gnu -o conftest.o conftest.s > /dev/null 2>&1
4826    then
4827      gcc_cv_as_compress_debug=2
4828      gcc_cv_as_compress_debug_option="--compress-debug-sections"
4829      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4830    # Before binutils 2.26, gas only supported --compress-debug-options and
4831    # emitted the traditional GNU format.
4832    elif $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s > /dev/null 2>&1
4833    then
4834      gcc_cv_as_compress_debug=1
4835      gcc_cv_as_compress_debug_option="--compress-debug-sections"
4836      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4837    else
4838      gcc_cv_as_compress_debug=0
4839    fi])
4840 AC_DEFINE_UNQUOTED(HAVE_AS_COMPRESS_DEBUG, $gcc_cv_as_compress_debug,
4841 [Define to the level of your assembler's compressed debug section support.])
4842 AC_DEFINE_UNQUOTED(AS_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_compress_debug_option",
4843 [Define to the assembler option to enable compressed debug sections.])
4844 AC_DEFINE_UNQUOTED(AS_NO_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_no_compress_debug_option",
4845 [Define to the assembler option to disable compressed debug sections.])
4846
4847 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
4848  ,,
4849 [.lcomm bar,4,16],,
4850 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
4851   [Define if your assembler supports .lcomm with an alignment field.])])
4852
4853 if test x$with_sysroot = x && test x$host = x$target \
4854    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4855    && test "$prefix" != "NONE"; then
4856   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4857 [Define to PREFIX/include if cpp should also search that directory.])
4858 fi
4859
4860 # Determine the version of glibc, if any, used on the target.
4861 AC_MSG_CHECKING([for target glibc version])
4862 AC_ARG_WITH([glibc-version],
4863   [AS_HELP_STRING([--with-glibc-version=M.N],
4864     [assume GCC used with glibc version M.N or later])], [
4865 if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
4866   glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
4867   glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
4868 else
4869   AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
4870 fi], [
4871 glibc_version_major=0
4872 glibc_version_minor=0
4873 [if test -f $target_header_dir/features.h \
4874   && glibc_version_major_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC__[    ]+[0-9]' $target_header_dir/features.h` \
4875   && glibc_version_minor_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+[0-9]' $target_header_dir/features.h`; then
4876   glibc_version_major=`echo "$glibc_version_major_define" | sed -e 's/.*__GLIBC__[      ]*//'`
4877   glibc_version_minor=`echo "$glibc_version_minor_define" | sed -e 's/.*__GLIBC_MINOR__[        ]*//'`
4878 fi]])
4879 AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])
4880 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MAJOR], [$glibc_version_major],
4881 [GNU C Library major version number used on the target, or 0.])
4882 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MINOR], [$glibc_version_minor],
4883 [GNU C Library minor version number used on the target, or 0.])
4884
4885 AC_ARG_ENABLE(gnu-unique-object,
4886  [AS_HELP_STRING([--enable-gnu-unique-object],
4887    [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
4888  [case $enable_gnu_unique_object in
4889     yes | no) ;;
4890     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
4891 Valid choices are 'yes' and 'no'.]) ;;
4892   esac],
4893  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
4894    [elf,2,19,52],,
4895    [.type foo, '$target_type_format_char'gnu_unique_object],,
4896 # We need to unquote above to to use the definition from config.gcc.
4897 # Also check for ld.so support, i.e. glibc 2.11 or higher.
4898    [GCC_GLIBC_VERSION_GTE_IFELSE([2], [11], [enable_gnu_unique_object=yes], )]
4899    )])
4900 if test x$enable_gnu_unique_object = xyes; then
4901   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
4902    [Define if your assembler supports @gnu_unique_object.])
4903 fi
4904
4905 AC_CACHE_CHECK([assembler for tolerance to line number 0],
4906  [gcc_cv_as_line_zero],
4907  [gcc_cv_as_line_zero=no
4908   if test $in_tree_gas = yes; then
4909     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
4910   elif test "x$gcc_cv_as" != x; then
4911     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
4912     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
4913        test "x`cat conftest.out`" = x
4914     then
4915       gcc_cv_as_line_zero=yes
4916     else
4917       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
4918       cat conftest.s >&AS_MESSAGE_LOG_FD
4919       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
4920       cat conftest.out >&AS_MESSAGE_LOG_FD
4921     fi
4922     rm -f conftest.o conftest.s conftest.out
4923   fi])
4924 if test "x$gcc_cv_as_line_zero" = xyes; then
4925   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
4926 [Define if the assembler won't complain about a line such as # 0 "" 2.])
4927 fi
4928
4929 AC_MSG_CHECKING(support for thin archives)
4930 thin_archive_support=no
4931 echo 'int main (void) { return 0; }' > conftest.c
4932 if ($AR --version | sed 1q | grep "GNU ar" \
4933     && $CC $CFLAGS -c conftest.c \
4934     && $AR rcT conftest.a conftest.o \
4935     && $CC $CFLAGS $LDFLAGS -o conftest conftest.a) >/dev/null 2>&1; then
4936   thin_archive_support=yes
4937 fi
4938 rm -f conftest.c conftest.o conftest.a conftest
4939 AC_MSG_RESULT($thin_archive_support)
4940 AC_SUBST(thin_archive_support)
4941
4942 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
4943 gcc_cv_ld_eh_frame_hdr=no
4944 if test $in_tree_ld = yes ; then
4945   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
4946      && test $in_tree_ld_is_elf = yes; then
4947     gcc_cv_ld_eh_frame_hdr=yes
4948   fi
4949 elif test x$gcc_cv_ld != x; then
4950   if echo "$ld_ver" | grep GNU > /dev/null; then
4951     # Check if linker supports --eh-frame-hdr option
4952     if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
4953       gcc_cv_ld_eh_frame_hdr=yes
4954     fi
4955   else
4956     case "$target" in
4957       *-*-solaris2*)
4958         # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
4959         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
4960           gcc_cv_ld_eh_frame_hdr=yes
4961         fi
4962         ;;
4963     esac
4964   fi
4965 fi
4966 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
4967 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
4968         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
4969 [Define if your linker supports .eh_frame_hdr.])
4970 fi
4971 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
4972
4973 AC_MSG_CHECKING(linker CIEv3 in .eh_frame support)
4974 gcc_cv_ld_eh_frame_ciev3=no
4975 if test $in_tree_ld = yes ; then
4976   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
4977      && test $in_tree_ld_is_elf = yes; then
4978     gcc_cv_ld_eh_frame_ciev3=yes
4979   fi
4980 elif test x$gcc_cv_ld != x; then
4981   if echo "$ld_ver" | grep GNU > /dev/null; then
4982     gcc_cv_ld_eh_frame_ciev3=yes
4983     if test 0"$ld_date" -lt 20040513; then
4984       if test -n "$ld_date"; then
4985         # If there was date string, but was earlier than 2004-05-13, fail
4986         gcc_cv_ld_eh_frame_ciev3=no
4987       elif test "$ld_vers_major" -lt 2; then
4988         gcc_cv_ld_eh_frame_ciev3=no
4989       elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
4990         gcc_cv_ld_eh_frame_ciev3=no
4991       fi
4992     fi
4993   else
4994     case "$target" in
4995       *-*-solaris2*)
4996         # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
4997         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
4998           gcc_cv_ld_eh_frame_ciev3=yes
4999         fi
5000         ;;
5001     esac
5002   fi
5003 fi
5004 AC_DEFINE_UNQUOTED(HAVE_LD_EH_FRAME_CIEV3,
5005   [`if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`],
5006   [Define 0/1 if your linker supports CIE v3 in .eh_frame.])
5007 AC_MSG_RESULT($gcc_cv_ld_eh_frame_ciev3)
5008
5009 AC_MSG_CHECKING(linker position independent executable support)
5010 gcc_cv_ld_pie=no
5011 if test $in_tree_ld = yes ; then
5012   case "$target" in
5013     # Full PIE support on Solaris was only introduced in gld 2.26.
5014     *-*-solaris2*)  gcc_gld_pie_min_version=26 ;;
5015     *)              gcc_gld_pie_min_version=15 ;;
5016   esac
5017   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge "$gcc_gld_pie_min_version" -o "$gcc_cv_gld_major_version" -gt 2 \
5018      && test $in_tree_ld_is_elf = yes; then
5019     gcc_cv_ld_pie=yes
5020   fi
5021 elif test x$gcc_cv_ld != x; then
5022   # Check if linker supports -pie option
5023   if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
5024     gcc_cv_ld_pie=yes
5025     case "$target" in
5026       *-*-solaris2*)
5027         if echo "$ld_ver" | grep GNU > /dev/null \
5028           && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5029           gcc_cv_ld_pie=no
5030         fi
5031         ;;
5032     esac
5033   else
5034     case "$target" in
5035       *-*-solaris2.1[[1-9]]*)
5036         # Solaris 11.x and Solaris 12 added PIE support.
5037         if $gcc_cv_ld -z help 2>&1 | grep -- type.*pie > /dev/null; then
5038           gcc_cv_ld_pie=yes
5039         fi
5040         ;;
5041     esac
5042   fi
5043 fi
5044 if test x"$gcc_cv_ld_pie" = xyes; then
5045         AC_DEFINE(HAVE_LD_PIE, 1,
5046 [Define if your linker supports PIE option.])
5047 fi
5048 AC_MSG_RESULT($gcc_cv_ld_pie)
5049
5050 AC_MSG_CHECKING(linker PIE support with copy reloc)
5051 gcc_cv_ld_pie_copyreloc=no
5052 if test $gcc_cv_ld_pie = yes ; then
5053   if test $in_tree_ld = yes ; then
5054     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
5055       gcc_cv_ld_pie_copyreloc=yes
5056     fi
5057   elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5058     # Check if linker supports -pie option with copy reloc
5059     case "$target" in
5060     i?86-*-linux* | x86_64-*-linux*)
5061       cat > conftest1.s <<EOF
5062         .globl  a_glob
5063         .data
5064         .type   a_glob, @object
5065         .size   a_glob, 4
5066 a_glob:
5067         .long   2
5068 EOF
5069       cat > conftest2.s <<EOF
5070         .text
5071         .globl  main
5072         .type   main, @function
5073 main:
5074         movl    %eax, a_glob(%rip)
5075         .size   main, .-main
5076         .globl  ptr
5077         .section        .data.rel,"aw",@progbits
5078         .type   ptr, @object
5079 ptr:
5080         .quad   a_glob
5081 EOF
5082       if $gcc_cv_as --64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5083          && $gcc_cv_ld -shared -melf_x86_64 -o conftest1.so conftest1.o > /dev/null 2>&1 \
5084          && $gcc_cv_as --64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5085          && $gcc_cv_ld -pie -melf_x86_64 -o conftest conftest2.o conftest1.so > /dev/null 2>&1; then
5086         gcc_cv_ld_pie_copyreloc=yes
5087       fi
5088       rm -f conftest conftest1.so conftest1.o conftest2.o conftest1.s conftest2.s
5089       ;;
5090     esac
5091   fi
5092 fi
5093 AC_DEFINE_UNQUOTED(HAVE_LD_PIE_COPYRELOC,
5094   [`if test x"$gcc_cv_ld_pie_copyreloc" = xyes; then echo 1; else echo 0; fi`],
5095   [Define 0/1 if your linker supports -pie option with copy reloc.])
5096 AC_MSG_RESULT($gcc_cv_ld_pie_copyreloc)
5097
5098 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
5099 gcc_cv_ld_eh_gc_sections=no
5100 if test $in_tree_ld = yes ; then
5101   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
5102      && test $in_tree_ld_is_elf = yes; then
5103     gcc_cv_ld_eh_gc_sections=yes
5104   fi
5105 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
5106   cat > conftest.s <<EOF
5107         .section        .text
5108 .globl _start
5109         .type _start, @function
5110 _start:
5111         .long foo
5112         .size _start, .-_start
5113         .section        .text.foo,"ax",@progbits
5114         .type foo, @function
5115 foo:
5116         .long 0
5117         .size foo, .-foo
5118         .section        .gcc_except_table.foo,"a",@progbits
5119 .L0:
5120         .long 0
5121         .section        .eh_frame,"a",@progbits
5122         .long .L0
5123 EOF
5124   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5125     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5126          | grep "gc-sections option ignored" > /dev/null; then
5127       gcc_cv_ld_eh_gc_sections=no
5128     elif $gcc_cv_objdump -h conftest 2> /dev/null \
5129          | grep gcc_except_table > /dev/null; then
5130       gcc_cv_ld_eh_gc_sections=yes
5131       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
5132       if test x$gcc_cv_as_comdat_group != xyes; then
5133         gcc_cv_ld_eh_gc_sections=no
5134         cat > conftest.s <<EOF
5135         .section        .text
5136 .globl _start
5137         .type _start, @function
5138 _start:
5139         .long foo
5140         .size _start, .-_start
5141         .section        .gnu.linkonce.t.foo,"ax",@progbits
5142         .type foo, @function
5143 foo:
5144         .long 0
5145         .size foo, .-foo
5146         .section        .gcc_except_table.foo,"a",@progbits
5147 .L0:
5148         .long 0
5149         .section        .eh_frame,"a",@progbits
5150         .long .L0
5151 EOF
5152         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5153           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5154                | grep "gc-sections option ignored" > /dev/null; then
5155             gcc_cv_ld_eh_gc_sections=no
5156           elif $gcc_cv_objdump -h conftest 2> /dev/null \
5157                | grep gcc_except_table > /dev/null; then
5158             gcc_cv_ld_eh_gc_sections=yes
5159           fi
5160         fi
5161       fi
5162     fi
5163   fi
5164   rm -f conftest.s conftest.o conftest
5165 fi
5166 case "$target" in
5167   hppa*-*-linux*)
5168     # ??? This apparently exposes a binutils bug with PC-relative relocations.
5169     gcc_cv_ld_eh_gc_sections=no
5170     ;;
5171 esac
5172 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
5173         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
5174   [Define if your linker supports garbage collection of
5175    sections in presence of EH frames.])
5176 fi
5177 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
5178
5179 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
5180 gcc_cv_ld_eh_gc_sections_bug=no
5181 if test $in_tree_ld = yes ; then
5182   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
5183      && test $in_tree_ld_is_elf = yes; then
5184     gcc_cv_ld_eh_gc_sections_bug=yes
5185   fi
5186 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x -a x$gcc_cv_as_comdat_group = xyes; then
5187   gcc_cv_ld_eh_gc_sections_bug=yes
5188   cat > conftest.s <<EOF
5189         .section        .text
5190 .globl _start
5191         .type _start, @function
5192 _start:
5193         .long foo
5194         .size _start, .-_start
5195         .section        .text.startup.foo,"ax",@progbits
5196         .type foo, @function
5197 foo:
5198         .long 0
5199         .size foo, .-foo
5200         .section        .gcc_except_table.foo,"a",@progbits
5201 .L0:
5202         .long 0
5203         .section        .eh_frame,"a",@progbits
5204         .long .L0
5205 EOF
5206   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5207     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5208          | grep "gc-sections option ignored" > /dev/null; then
5209       :
5210     elif $gcc_cv_objdump -h conftest 2> /dev/null \
5211          | grep gcc_except_table > /dev/null; then
5212       gcc_cv_ld_eh_gc_sections_bug=no
5213     fi
5214   fi
5215   rm -f conftest.s conftest.o conftest
5216 fi
5217 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
5218         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
5219   [Define if your linker has buggy garbage collection of
5220    sections support when .text.startup.foo like sections are used.])
5221 fi
5222 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
5223
5224 AC_MSG_CHECKING(linker for compressed debug sections)
5225 # gold/gld support compressed debug sections since binutils 2.19/2.21
5226 # In binutils 2.26, gld gained support for the ELF gABI format.
5227 if test $in_tree_ld = yes ; then
5228   gcc_cv_ld_compress_debug=0
5229   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 19 -o "$gcc_cv_gld_major_version" -gt 2 \
5230      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = yes; then
5231     gcc_cv_ld_compress_debug=2
5232     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5233   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 26 -o "$gcc_cv_gld_major_version" -gt 2 \
5234      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = no; then
5235     gcc_cv_ld_compress_debug=3
5236     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5237   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2 \
5238      && test $in_tree_ld_is_elf = yes; then
5239     gcc_cv_ld_compress_debug=1
5240   fi
5241 elif echo "$ld_ver" | grep GNU > /dev/null; then
5242   if test "$ld_vers_major" -lt 2 \
5243      || test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 21; then
5244     gcc_cv_ld_compress_debug=0
5245   elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5246     gcc_cv_ld_compress_debug=1
5247   else
5248     gcc_cv_ld_compress_debug=3
5249     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5250   fi
5251   if test $ld_is_gold = yes; then
5252     gcc_cv_ld_compress_debug=2
5253     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5254   fi
5255 else
5256 changequote(,)dnl
5257   case "${target}" in
5258     *-*-solaris2*)
5259       # Introduced in Solaris 11.2.
5260       if $gcc_cv_ld --help 2>&1 | grep -- '-z compress-sections' > /dev/null; then
5261         gcc_cv_ld_compress_debug=3
5262         gcc_cv_ld_compress_debug_option="-z compress-sections"
5263       else
5264         gcc_cv_ld_compress_debug=0
5265       fi
5266       ;;
5267     *)
5268       # Assume linkers other than GNU ld don't support compessed debug
5269       # sections.
5270       gcc_cv_ld_compress_debug=0
5271       ;;
5272   esac
5273 changequote([,])dnl
5274 fi
5275 AC_DEFINE_UNQUOTED(HAVE_LD_COMPRESS_DEBUG, $gcc_cv_ld_compress_debug,
5276 [Define to the level of your linker's compressed debug section support.])
5277 AC_DEFINE_UNQUOTED(LD_COMPRESS_DEBUG_OPTION, "$gcc_cv_ld_compress_debug_option",
5278 [Define to the linker option to enable compressed debug sections.])
5279 AC_MSG_RESULT($gcc_cv_ld_compress_debug)
5280
5281 if test x"$ld64_flag" = x"yes"; then
5282
5283   # Set defaults for possibly untestable items.
5284   gcc_cv_ld64_export_dynamic=0
5285
5286   if test "$build" = "$host"; then
5287     darwin_try_test=1
5288   else
5289     darwin_try_test=0
5290   fi
5291
5292   # On Darwin, because of FAT library support, it is often possible to execute
5293   # exes from compatible archs even when the host differs from the build system.
5294   case "$build","$host" in
5295     x86_64-*-darwin*,i?86-*-darwin* | powerpc64*-*-darwin*,powerpc*-*-darwin*)
5296         darwin_try_test=1;;
5297     *) ;;
5298   esac
5299
5300   # If the configurer specified a minimum ld64 version to be supported, then use
5301   # that to determine feature support.
5302   if test x"${gcc_cv_ld64_version}" != x; then
5303     AC_MSG_CHECKING(ld64 specified version)
5304     gcc_cv_ld64_major=`echo "$gcc_cv_ld64_version" | sed -e 's/\..*//'`
5305     AC_MSG_RESULT($gcc_cv_ld64_major)
5306    if test "$gcc_cv_ld64_major" -ge 236; then
5307       gcc_cv_ld64_export_dynamic=1
5308     fi
5309   elif test -x "$gcc_cv_ld" -a "$darwin_try_test" -eq 1; then
5310     # If the version was not specified, try to find it.
5311     AC_MSG_CHECKING(linker version)
5312     if test x"${gcc_cv_ld64_version}" = x; then
5313       gcc_cv_ld64_version=`$gcc_cv_ld -v 2>&1 | grep ld64 | sed s/.*ld64-// | awk '{print $1}'`
5314     fi
5315     AC_MSG_RESULT($gcc_cv_ld64_version)
5316
5317     AC_MSG_CHECKING(linker for -export_dynamic support)
5318     gcc_cv_ld64_export_dynamic=1
5319     if $gcc_cv_ld -export_dynamic < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then
5320       gcc_cv_ld64_export_dynamic=0
5321     fi
5322     AC_MSG_RESULT($gcc_cv_ld64_export_dynamic)
5323   fi
5324
5325   if test x"${gcc_cv_ld64_version}" != x; then
5326     AC_DEFINE_UNQUOTED(LD64_VERSION, "${gcc_cv_ld64_version}",
5327       [Define to ld64 version.])
5328   fi
5329
5330   AC_DEFINE_UNQUOTED(LD64_HAS_EXPORT_DYNAMIC, $gcc_cv_ld64_export_dynamic,
5331   [Define to 1 if ld64 supports '-export_dynamic'.])
5332 fi
5333
5334 # --------
5335 # UNSORTED
5336 # --------
5337
5338 AC_CACHE_CHECK(linker --as-needed support,
5339 gcc_cv_ld_as_needed,
5340 [gcc_cv_ld_as_needed=no
5341 gcc_cv_ld_as_needed_option='--as-needed'
5342 gcc_cv_ld_no_as_needed_option='--no-as-needed'
5343 if test $in_tree_ld = yes ; then
5344   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
5345      && test $in_tree_ld_is_elf = yes; then
5346     gcc_cv_ld_as_needed=yes
5347   fi
5348 elif test x$gcc_cv_ld != x; then
5349         # Check if linker supports --as-needed and --no-as-needed options
5350         if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
5351                 gcc_cv_ld_as_needed=yes
5352         else
5353           case "$target" in
5354             # Solaris 2 ld always supports -z ignore/-z record.
5355             *-*-solaris2*)
5356               gcc_cv_ld_as_needed=yes
5357               gcc_cv_ld_as_needed_option="-z ignore"
5358               gcc_cv_ld_no_as_needed_option="-z record"
5359               ;;
5360           esac
5361         fi
5362 fi
5363 # --as-needed/-z ignore can only be used if libgcc_s.so.1 uses
5364 # dl_iterate_phdr, i.e. since Solaris 11.
5365 case "$target" in
5366   *-*-solaris2.1[[1-9]]*)
5367     case "$target" in
5368     i?86-*-* | x86_64-*-*)
5369       if echo "$ld_ver" | grep GNU > /dev/null; then
5370         # Doesn't work with gld on Solaris/x86 due to PR ld/12320.
5371         gcc_cv_ld_as_needed=no
5372       fi
5373       ;;
5374     esac
5375     ;;
5376   *-*-solaris2*)
5377     gcc_cv_ld_as_needed=no
5378     ;;
5379 esac
5380 ])
5381 if test x"$gcc_cv_ld_as_needed" = xyes; then
5382         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
5383 [Define if your linker supports --as-needed/--no-as-needed or equivalent options.])
5384         AC_DEFINE_UNQUOTED(LD_AS_NEEDED_OPTION, "$gcc_cv_ld_as_needed_option",
5385 [Define to the linker option to ignore unused dependencies.])
5386         AC_DEFINE_UNQUOTED(LD_NO_AS_NEEDED_OPTION, "$gcc_cv_ld_no_as_needed_option",
5387 [Define to the linker option to keep unused dependencies.])
5388 fi
5389
5390 AC_MSG_CHECKING(linker mapfile support for clearing hardware capabilities)
5391 saved_LDFLAGS="$LDFLAGS"
5392 for clearcap_map in sol2-clearcapv2.map sol2-clearcap.map; do
5393   LDFLAGS="$saved_LDFLAGS -Wl,-M,${srcdir}/config/$clearcap_map"
5394   AC_LINK_IFELSE([int main(void) {return 0;}],
5395     [gcc_cv_ld_clearcap=yes; break], [gcc_cv_ld_clearcap=no])
5396 done
5397 LDFLAGS="$saved_LDFLAGS"
5398 if test "x$gcc_cv_ld_clearcap" = xyes; then
5399   AC_DEFINE([HAVE_LD_CLEARCAP], 1,
5400 [Define if the linker supports clearing hardware capabilities via mapfile.])
5401   AC_CONFIG_LINKS([clearcap.map:${srcdir}/config/$clearcap_map])
5402 fi
5403 AC_MSG_RESULT($gcc_cv_ld_clearcap)
5404
5405 case "$target" in
5406   powerpc*-*-*)
5407     case "$target" in
5408       *le-*-linux*)
5409         emul_name="-melf32lppc"
5410         ;;
5411       *)
5412         emul_name="-melf32ppc"
5413         ;;
5414     esac
5415     AC_CACHE_CHECK(linker .gnu.attributes long double support,
5416     gcc_cv_ld_ppc_attr,
5417     [gcc_cv_ld_ppc_attr=no
5418     if test x"$ld_is_gold" = xyes; then
5419       gcc_cv_ld_ppc_attr=yes
5420     elif test $in_tree_ld = yes ; then
5421       if test "$gcc_cv_gld_major_version" -eq 2 \
5422                 -a "$gcc_cv_gld_minor_version" -ge 28 \
5423                 -o "$gcc_cv_gld_major_version" -gt 2; then
5424         gcc_cv_ld_ppc_attr=yes
5425       fi
5426     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5427       # check that merging the long double .gnu_attribute doesn't warn
5428       cat > conftest1.s <<EOF
5429         .gnu_attribute 4,1
5430 EOF
5431       cat > conftest2.s <<EOF
5432         .gnu_attribute 4,9
5433 EOF
5434       if $gcc_cv_as -a32 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5435          && $gcc_cv_as -a32 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5436          && $gcc_cv_ld $emul_name -r -o conftest.o conftest1.o conftest2.o > /dev/null 2> conftest.err \
5437          && test ! -s conftest.err; then
5438         gcc_cv_ld_ppc_attr=yes
5439       fi
5440       rm -f conftest.err conftest.o conftest1.o conftest2.o conftest1.s conftest2.s
5441     fi
5442     ])
5443     if test x$gcc_cv_ld_ppc_attr = xyes; then
5444       AC_DEFINE(HAVE_LD_PPC_GNU_ATTR_LONG_DOUBLE, 1,
5445     [Define if your PowerPC linker has .gnu.attributes long double support.])
5446     fi
5447     ;;
5448 esac
5449
5450 case "$target:$tm_file" in
5451   powerpc64-*-freebsd* | powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
5452   case "$target" in
5453      *le-*-linux*)
5454      emul_name="-melf64lppc"
5455       ;;
5456      *-*-linux*)
5457      emul_name="-melf64ppc"
5458       ;;
5459      *-*-freebsd*)
5460      emul_name="-melf64ppc_fbsd"
5461       ;;
5462   esac
5463     AC_CACHE_CHECK(linker support for omitting dot symbols,
5464     gcc_cv_ld_no_dot_syms,
5465     [gcc_cv_ld_no_dot_syms=no
5466     if test x"$ld_is_gold" = xyes; then
5467       gcc_cv_ld_no_dot_syms=yes
5468     elif test $in_tree_ld = yes ; then
5469       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
5470         gcc_cv_ld_no_dot_syms=yes
5471       fi
5472     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5473       cat > conftest1.s <<EOF
5474         .text
5475         bl .foo
5476 EOF
5477       cat > conftest2.s <<EOF
5478         .section ".opd","aw"
5479         .align 3
5480         .globl foo
5481         .type foo,@function
5482 foo:
5483         .quad .LEfoo,.TOC.@tocbase,0
5484         .text
5485 .LEfoo:
5486         blr
5487         .size foo,.-.LEfoo
5488 EOF
5489       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5490          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5491          && $gcc_cv_ld $emul_name -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
5492         gcc_cv_ld_no_dot_syms=yes
5493       fi
5494       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
5495     fi
5496     ])
5497     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
5498       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
5499     [Define if your PowerPC64 linker only needs function descriptor syms.])
5500     fi
5501
5502     AC_CACHE_CHECK(linker large toc support,
5503     gcc_cv_ld_large_toc,
5504     [gcc_cv_ld_large_toc=no
5505     if test x"$ld_is_gold" = xyes; then
5506       gcc_cv_ld_large_toc=yes
5507     elif test $in_tree_ld = yes ; then
5508       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
5509         gcc_cv_ld_large_toc=yes
5510       fi
5511     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5512       cat > conftest.s <<EOF
5513         .section ".tbss","awT",@nobits
5514         .align 3
5515 ie0:    .space 8
5516         .global _start
5517         .text
5518 _start:
5519         addis 9,13,ie0@got@tprel@ha
5520         ld 9,ie0@got@tprel@l(9)
5521 EOF
5522       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
5523          && $gcc_cv_ld $emul_name --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
5524         gcc_cv_ld_large_toc=yes
5525       fi
5526       rm -f conftest conftest.o conftest.s
5527     fi
5528     ])
5529     if test x"$gcc_cv_ld_large_toc" = xyes; then
5530       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
5531     [Define if your PowerPC64 linker supports a large TOC.])
5532     fi
5533
5534     AC_CACHE_CHECK(linker toc pointer alignment,
5535     gcc_cv_ld_toc_align,
5536     [if test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_nm != x; then
5537       cat > conftest.s <<EOF
5538         .global _start
5539         .text
5540 _start:
5541         addis 9,2,x@got@ha
5542         .section .data.rel.ro,"aw",@progbits
5543         .p2align 16
5544         .space 32768
5545 x:      .quad .TOC.
5546 EOF
5547       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
5548          && $gcc_cv_ld $emul_name -z norelro -o conftest conftest.o > /dev/null 2>&1; then
5549         gcc_cv_ld_toc_align=`$gcc_cv_nm conftest | ${AWK} '/\.TOC\./ { match ($0, "0[[[:xdigit:]]]*", a); print strtonum ("0x" substr(a[[0]], length(a[[0]])-3)) }'`
5550       fi
5551       rm -f conftest conftest.o conftest.s
5552     fi
5553     ])
5554     if test -n "$gcc_cv_ld_toc_align" && test $gcc_cv_ld_toc_align -gt 8; then
5555       AC_DEFINE_UNQUOTED(POWERPC64_TOC_POINTER_ALIGNMENT, $gcc_cv_ld_toc_align,
5556     [Define to .TOC. alignment forced by your linker.])
5557     fi
5558     ;;
5559 esac
5560
5561 case "$target" in
5562   *-*-aix*)
5563     AC_CACHE_CHECK(linker large toc support,
5564     gcc_cv_ld_large_toc,
5565     [gcc_cv_ld_large_toc=no
5566     if test x$gcc_cv_as != x ; then
5567       cat > conftest.s <<EOF
5568         .toc
5569 LC..1:
5570         .tc a[[TC]],a[[RW]]
5571         .extern a[[RW]]
5572         .csect .text[[PR]]
5573 .largetoctest:
5574         addis 9,LC..1@u(2)
5575         ld 3,LC..1@l(9)
5576 EOF
5577       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1; then
5578         gcc_cv_ld_large_toc=yes
5579       fi
5580       rm -f conftest conftest.o conftest.s
5581     fi
5582     ])
5583     if test x"$gcc_cv_ld_large_toc" = xyes; then
5584       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
5585     [Define if your PowerPC64 linker supports a large TOC.])
5586     fi
5587     ;;
5588 esac
5589
5590 AC_CACHE_CHECK(linker --build-id support,
5591   gcc_cv_ld_buildid,
5592   [gcc_cv_ld_buildid=no
5593   if test $in_tree_ld = yes ; then
5594     if test "$gcc_cv_gld_major_version" -eq 2 -a \
5595        "$gcc_cv_gld_minor_version" -ge 18 -o \
5596        "$gcc_cv_gld_major_version" -gt 2 \
5597        && test $in_tree_ld_is_elf = yes; then
5598       gcc_cv_ld_buildid=yes
5599     fi
5600   elif test x$gcc_cv_ld != x; then
5601     if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
5602       gcc_cv_ld_buildid=yes
5603     fi
5604   fi])
5605 if test x"$gcc_cv_ld_buildid" = xyes; then
5606   AC_DEFINE(HAVE_LD_BUILDID, 1,
5607   [Define if your linker supports --build-id.])
5608 fi
5609
5610 AC_ARG_ENABLE(linker-build-id,
5611 [AS_HELP_STRING([--enable-linker-build-id],
5612                 [compiler will always pass --build-id to linker])],
5613 [],
5614 enable_linker_build_id=no)
5615
5616 if test x"$enable_linker_build_id" = xyes; then
5617   if test x"$gcc_cv_ld_buildid" = xyes; then
5618     AC_DEFINE(ENABLE_LD_BUILDID, 1,
5619     [Define if gcc should always pass --build-id to linker.])
5620   else
5621     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
5622   fi
5623 fi
5624
5625 # In binutils 2.21, GNU ld gained support for new emulations fully
5626 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
5627 AC_CACHE_CHECK(linker *_sol2 emulation support,
5628   gcc_cv_ld_sol2_emulation,
5629   [gcc_cv_ld_sol2_emulation=no
5630   if test $in_tree_ld = yes ; then
5631     if test "$gcc_cv_gld_major_version" -eq 2 -a \
5632        "$gcc_cv_gld_minor_version" -ge 21 -o \
5633        "$gcc_cv_gld_major_version" -gt 2 \
5634        && test $in_tree_ld_is_elf = yes; then
5635       gcc_cv_ld_sol2_emulation=yes
5636     fi
5637   elif test x$gcc_cv_ld != x; then
5638     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
5639        grep _sol2 > /dev/null; then
5640       gcc_cv_ld_sol2_emulation=yes
5641     fi
5642   fi])
5643 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
5644   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
5645   [Define if your linker supports the *_sol2 emulations.])
5646 fi
5647
5648 AC_CACHE_CHECK(linker --sysroot support,
5649   gcc_cv_ld_sysroot,
5650   [gcc_cv_ld_sysroot=no
5651   if test $in_tree_ld = yes ; then
5652       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
5653         gcc_cv_ld_sysroot=yes
5654       fi
5655   elif test x$gcc_cv_ld != x; then
5656     if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
5657       gcc_cv_ld_sysroot=yes
5658     fi
5659   fi])
5660 if test x"$gcc_cv_ld_sysroot" = xyes; then
5661   AC_DEFINE(HAVE_LD_SYSROOT, 1,
5662   [Define if your linker supports --sysroot.])
5663 fi
5664
5665 case $target in
5666 *-*-solaris2*)
5667   # Check for system-provided CRTs on Solaris 11.x and Solaris 12.
5668   AC_CACHE_CHECK([system-provided CRTs on Solaris],
5669     gcc_cv_solaris_crts,
5670     [gcc_cv_solaris_crts=no
5671      if test x$host != x$target; then
5672        if test "x$with_sysroot" = xyes; then
5673          target_sysroot="${test_exec_prefix}/${target_noncanonical}/sys-root"
5674        else
5675          target_sysroot="${with_sysroot}"
5676        fi
5677      fi
5678      target_libdir="$target_sysroot/usr/lib"
5679      # At the time they were added, gcrt1.o became a symlink for backwards
5680      # compatibility on x86, while crt1.o was added on sparc, so check for that.
5681      case $target in
5682        i?86-*-solaris2* | x86_64-*-solaris2*)
5683          if test -h "$target_libdir/gcrt1.o"; then gcc_cv_solaris_crts=yes; fi
5684          ;;
5685        sparc*-*-solaris2*)
5686          if test -f "$target_libdir/crt1.o"; then gcc_cv_solaris_crts=yes; fi
5687          ;;
5688      esac])
5689   ;;
5690 esac
5691 if test x$gcc_cv_solaris_crts = xyes; then
5692   AC_DEFINE(HAVE_SOLARIS_CRTS, 1,
5693             [Define if the system-provided CRTs are present on Solaris.])
5694 fi
5695
5696 # Test for stack protector support in target C library.
5697 AC_CACHE_CHECK(__stack_chk_fail in target C library,
5698       gcc_cv_libc_provides_ssp,
5699       [gcc_cv_libc_provides_ssp=no
5700     case "$target" in
5701        *-*-musl*)
5702          # All versions of musl provide stack protector
5703          gcc_cv_libc_provides_ssp=yes;;
5704        *-*-linux* | *-*-kfreebsd*-gnu)
5705       # glibc 2.4 and later provides __stack_chk_fail and
5706       # either __stack_chk_guard, or TLS access to stack guard canary.
5707       GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_libc_provides_ssp=yes], [
5708       [if test -f $target_header_dir/features.h \
5709          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
5710             $target_header_dir/features.h > /dev/null; then
5711         if $EGREP '^[   ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
5712              $target_header_dir/features.h > /dev/null && \
5713              test -f $target_header_dir/bits/uClibc_config.h && \
5714              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
5715              $target_header_dir/bits/uClibc_config.h > /dev/null; then
5716           gcc_cv_libc_provides_ssp=yes
5717         fi
5718       # all versions of Bionic support stack protector
5719       elif test -f $target_header_dir/sys/cdefs.h \
5720         && $EGREP '^[  ]*#[    ]*define[       ]+__BIONIC__[   ]+1' \
5721            $target_header_dir/sys/cdefs.h > /dev/null; then
5722          gcc_cv_libc_provides_ssp=yes
5723       fi]])
5724         ;;
5725        *-*-gnu*)
5726          # Avoid complicated tests (see
5727          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
5728          # simply assert that glibc does provide this, which is true for all
5729          # realistically usable GNU/Hurd configurations.
5730          # All supported versions of musl provide it as well
5731          gcc_cv_libc_provides_ssp=yes;;
5732        *-*-darwin* | *-*-freebsd* | *-*-netbsd*)
5733          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
5734            [echo "no __stack_chk_fail on this target"])
5735         ;;
5736   *) gcc_cv_libc_provides_ssp=no ;;
5737     esac])
5738
5739 if test x$gcc_cv_libc_provides_ssp = xyes; then
5740   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
5741             [Define if your target C library provides stack protector support])
5742 fi
5743
5744 # Check whether --enable-default-ssp was given.
5745 AC_ARG_ENABLE(default-ssp,
5746 [AS_HELP_STRING([--enable-default-ssp],
5747   [enable Stack Smashing Protection as default])],[
5748 if test x$gcc_cv_libc_provides_ssp = xyes; then
5749   case "$target" in
5750     ia64*-*-*) enable_default_ssp=no ;;
5751     *) enable_default_ssp=$enableval ;;
5752   esac
5753 else
5754   enable_default_ssp=no
5755 fi],
5756 enable_default_ssp=no)
5757 if test x$enable_default_ssp = xyes ; then
5758   AC_DEFINE(ENABLE_DEFAULT_SSP, 1,
5759       [Define if your target supports default stack protector and it is enabled.])
5760 fi
5761 AC_SUBST([enable_default_ssp])
5762
5763 # Test for <sys/sdt.h> on the target.
5764 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
5765 AC_MSG_CHECKING(sys/sdt.h in the target C library)
5766 have_sys_sdt_h=no
5767 if test -f $target_header_dir/sys/sdt.h; then
5768   have_sys_sdt_h=yes
5769   AC_DEFINE(HAVE_SYS_SDT_H, 1,
5770             [Define if your target C library provides sys/sdt.h])
5771 fi
5772 AC_MSG_RESULT($have_sys_sdt_h)
5773
5774 # Check if TFmode long double should be used by default or not.
5775 # Some glibc targets used DFmode long double, but with glibc 2.4
5776 # and later they can use TFmode.
5777 case "$target" in
5778   powerpc*-*-linux* | \
5779   sparc*-*-linux* | \
5780   s390*-*-linux* | \
5781   alpha*-*-linux*)
5782     AC_ARG_WITH(long-double-128,
5783       [AS_HELP_STRING([--with-long-double-128],
5784                       [use 128-bit long double by default])],
5785       gcc_cv_target_ldbl128="$with_long_double_128",
5786       [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
5787       [gcc_cv_target_ldbl128=no
5788       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
5789         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
5790       && gcc_cv_target_ldbl128=yes
5791       ]])])
5792     ;;
5793 esac
5794 if test x$gcc_cv_target_ldbl128 = xyes; then
5795   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
5796             [Define if TFmode long double should be the default])
5797 fi
5798
5799 # Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
5800 # values in the TCB.  Currently, only GLIBC 2.23 and later support this.
5801 gcc_cv_libc_provides_hwcap_in_tcb=no
5802 case "$target" in
5803   powerpc*-*-linux*)
5804     GCC_GLIBC_VERSION_GTE_IFELSE([2], [23], [gcc_cv_libc_provides_hwcap_in_tcb=yes], )
5805     ;;
5806 esac
5807 if test x$gcc_cv_libc_provides_hwcap_in_tcb = xyes; then
5808   AC_DEFINE(TARGET_LIBC_PROVIDES_HWCAP_IN_TCB, 1,
5809             [Define if your target C Library provides the AT_HWCAP value in the TCB])
5810 fi
5811
5812 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
5813 gcc_cv_target_dl_iterate_phdr=unknown
5814 case "$target" in
5815   # Restrict to Solaris 11+.  While most of the Solaris 11 linker changes
5816   # were backported to Solaris 10 Update 10, dl_iterate_phdr only lives in
5817   # libdl there, both complicating its use and breaking compatibility
5818   # between Solaris 10 updates.
5819   *-*-solaris2.1[[1-9]]*)
5820     # <link.h> needs both a dl_iterate_phdr declaration and support for
5821     # compilation with largefile support.
5822     if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
5823       && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
5824       gcc_cv_target_dl_iterate_phdr=yes
5825     else
5826       gcc_cv_target_dl_iterate_phdr=no
5827     fi
5828     ;;
5829   *-*-dragonfly* | *-*-freebsd*)
5830     if grep dl_iterate_phdr $target_header_dir/sys/link_elf.h > /dev/null 2>&1; then
5831       gcc_cv_target_dl_iterate_phdr=yes
5832     else
5833       gcc_cv_target_dl_iterate_phdr=no
5834     fi
5835     ;;
5836   *-linux-musl*)
5837     gcc_cv_target_dl_iterate_phdr=yes
5838     ;;
5839 esac
5840 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
5841 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
5842    AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
5843 [Define if your target C library provides the `dl_iterate_phdr' function.])
5844 fi
5845 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
5846
5847 # We no longer support different GC mechanisms.  Emit an error if
5848 # the user configures with --with-gc.
5849 AC_ARG_WITH(gc,
5850 [AS_HELP_STRING([--with-gc={page,zone}],
5851                 [this option is not supported anymore.  It used to choose
5852                  the garbage collection mechanism to use with the compiler])],
5853 [AC_MSG_ERROR([Configure option --with-gc is only supported up to GCC 4.7.x])],
5854 [])
5855
5856 # Libraries to use on the host.  This will normally be set by the top
5857 # level Makefile.  Here we simply capture the value for our Makefile.
5858 if test -z "${HOST_LIBS+set}"; then
5859   HOST_LIBS=
5860 fi
5861 AC_SUBST(HOST_LIBS)
5862
5863 # Use the system's zlib library.
5864 AM_ZLIB
5865
5866 dnl Very limited version of automake's enable-maintainer-mode
5867
5868 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
5869   dnl maintainer-mode is disabled by default
5870   AC_ARG_ENABLE(maintainer-mode,
5871 [AS_HELP_STRING([--enable-maintainer-mode],
5872                 [enable make rules and dependencies not useful
5873                  (and sometimes confusing) to the casual installer])],
5874       maintainer_mode=$enableval,
5875       maintainer_mode=no)
5876
5877 AC_MSG_RESULT($maintainer_mode)
5878
5879 if test "$maintainer_mode" = "yes"; then
5880   MAINT=''
5881 else
5882   MAINT='#'
5883 fi
5884 AC_SUBST(MAINT)dnl
5885
5886 dnl Whether to prevent multiple front-ends from linking at the same time
5887
5888 AC_MSG_CHECKING([whether to avoid linking multiple front-ends at once])
5889   AC_ARG_ENABLE(link-mutex,
5890 [AS_HELP_STRING([--enable-link-mutex],
5891                 [avoid linking multiple front-ends at once to avoid thrashing
5892                  on the build machine])],
5893       do_link_mutex=$enableval,
5894       do_link_mutex=no)
5895 AC_MSG_RESULT($do_link_mutex)
5896
5897 if test "$do_link_mutex" = "yes"; then
5898    DO_LINK_MUTEX=true
5899 else
5900    DO_LINK_MUTEX=false
5901 fi
5902 AC_SUBST(DO_LINK_MUTEX)
5903
5904 # --------------
5905 # Language hooks
5906 # --------------
5907
5908 # Make empty files to contain the specs and options for each language.
5909 # Then add #include lines to for a compiler that has specs and/or options.
5910
5911 subdirs=
5912 lang_opt_files=
5913 lang_specs_files=
5914 lang_tree_files=
5915 # These (without "all_") are set in each config-lang.in.
5916 # `language' must be a single word so is spelled singularly.
5917 all_languages=
5918 all_compilers=
5919 all_outputs='Makefile'
5920 # List of language makefile fragments.
5921 all_lang_makefrags=
5922 # Additional files for gengtype
5923 all_gtfiles="$target_gtfiles"
5924
5925 # These are the languages that are set in --enable-languages,
5926 # and are available in the GCC tree.
5927 all_selected_languages=
5928
5929 # Add the language fragments.
5930 # Languages are added via two mechanisms.  Some information must be
5931 # recorded in makefile variables, these are defined in config-lang.in.
5932 # We accumulate them and plug them into the main Makefile.
5933 # The other mechanism is a set of hooks for each of the main targets
5934 # like `clean', `install', etc.
5935
5936 language_hooks="Make-hooks"
5937
5938 for lang in ${srcdir}/*/config-lang.in
5939 do
5940 changequote(,)dnl
5941         test "$lang" = "${srcdir}/*/config-lang.in" && continue
5942
5943         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
5944         if test "x$lang_alias" = x
5945         then
5946               echo "$lang doesn't set \$language." 1>&2
5947               exit 1
5948         fi
5949         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
5950         subdirs="$subdirs $subdir"
5951
5952         # $gcc_subdir is where the gcc integration files are to be found
5953         # for a language, both for internal compiler purposes (compiler
5954         # sources implementing front-end to GCC tree converters), and for
5955         # build infrastructure purposes (Make-lang.in, etc.)
5956         #
5957         # This will be <subdir> (relative to $srcdir) if a line like
5958         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
5959         # is found in <langdir>/config-lang.in, and will remain <langdir>
5960         # otherwise.
5961         #
5962         # Except for the language alias (fetched above), the regular
5963         # "config-lang.in" contents are always retrieved from $gcc_subdir,
5964         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
5965         # only this and the language alias.
5966
5967         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
5968         if [ "$gcc_subdir" = "" ]; then
5969            gcc_subdir="$subdir"
5970         fi
5971
5972         case ",$enable_languages," in
5973         *,$lang_alias,*)
5974             all_selected_languages="$all_selected_languages $lang_alias"
5975             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
5976                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
5977             fi
5978             ;;
5979         esac
5980 changequote([,])dnl
5981
5982         language=
5983         boot_language=
5984         compilers=
5985         outputs=
5986         gtfiles=
5987         subdir_requires=
5988         . ${srcdir}/$gcc_subdir/config-lang.in
5989         if test "x$language" = x
5990         then
5991                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
5992                 exit 1
5993         fi
5994
5995         ok=:
5996         case ",$enable_languages," in
5997                 *,$lang_alias,*) ;;
5998                 *)
5999                         for i in $subdir_requires; do
6000                                 test -f "${srcdir}/$i/config-lang.in" && continue
6001                                 ok=false
6002                                 break
6003                         done
6004                 ;;
6005         esac
6006         $ok || continue
6007
6008         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
6009         if test -f $srcdir/$gcc_subdir/lang.opt; then
6010             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
6011             all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
6012         fi
6013         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
6014             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
6015         fi
6016         all_languages="$all_languages $language"
6017         all_compilers="$all_compilers $compilers"
6018         all_outputs="$all_outputs $outputs"
6019         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
6020         case ",$enable_languages," in
6021                 *,lto,*)
6022                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
6023                     enable_lto=yes
6024                     AC_SUBST(enable_lto)
6025                     ;;
6026                 *) ;;
6027         esac
6028 done
6029
6030 check_languages=
6031 for language in $all_selected_languages
6032 do
6033         check_languages="$check_languages check-$language"
6034 done
6035
6036 # We link each language in with a set of hooks, reached indirectly via
6037 # lang.${target}.  Only do so for selected languages.
6038
6039 rm -f Make-hooks
6040 touch Make-hooks
6041 target_list="all.cross start.encap rest.encap tags \
6042         install-common install-man install-info install-pdf install-html dvi \
6043         pdf html uninstall info man srcextra srcman srcinfo \
6044         mostlyclean clean distclean maintainer-clean install-plugin"
6045
6046 for t in $target_list
6047 do
6048         x=
6049         for lang in $all_selected_languages
6050         do
6051                 x="$x $lang.$t"
6052         done
6053         echo "lang.$t: $x" >> Make-hooks
6054 done
6055
6056 # --------
6057 # Option include files
6058 # --------
6059
6060 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
6061 option_includes="option-includes.mk"
6062 AC_SUBST_FILE(option_includes)
6063
6064 # --------
6065 # UNSORTED
6066 # --------
6067
6068 # Create .gdbinit.
6069
6070 echo "dir ." > .gdbinit
6071 echo "dir ${srcdir}" >> .gdbinit
6072 if test x$gdb_needs_out_file_path = xyes
6073 then
6074         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
6075 fi
6076 if test "x$subdirs" != x; then
6077         for s in $subdirs
6078         do
6079                 echo "dir ${srcdir}/$s" >> .gdbinit
6080         done
6081 fi
6082 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
6083 echo "python import sys; sys.path.append('${srcdir}'); import gdbhooks" >> .gdbinit
6084
6085 # Put a breakpoint on __asan_report_error to help with debugging buffer
6086 # overflow.
6087 case "$CFLAGS" in
6088 *-fsanitize=address*)
6089   echo "source ${srcdir}/gdbasan.in" >> .gdbinit
6090   ;;
6091 esac
6092
6093 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
6094 AC_SUBST(gcc_tooldir)
6095 AC_SUBST(dollar)
6096
6097 # Find a directory in which to install a shared libgcc.
6098
6099 AC_ARG_ENABLE(version-specific-runtime-libs,
6100 [AS_HELP_STRING([--enable-version-specific-runtime-libs],
6101                 [specify that runtime libraries should be
6102                  installed in a compiler-specific directory])])
6103
6104 # Substitute configuration variables
6105 AC_SUBST(subdirs)
6106 AC_SUBST(srcdir)
6107 AC_SUBST(all_compilers)
6108 AC_SUBST(all_gtfiles)
6109 AC_SUBST(all_lang_makefrags)
6110 AC_SUBST(all_languages)
6111 AC_SUBST(all_selected_languages)
6112 AC_SUBST(build_exeext)
6113 AC_SUBST(build_install_headers_dir)
6114 AC_SUBST(build_xm_file_list)
6115 AC_SUBST(build_xm_include_list)
6116 AC_SUBST(build_xm_defines)
6117 AC_SUBST(build_file_translate)
6118 AC_SUBST(check_languages)
6119 AC_SUBST(cpp_install_dir)
6120 AC_SUBST(xmake_file)
6121 AC_SUBST(tmake_file)
6122 AC_SUBST(TM_ENDIAN_CONFIG)
6123 AC_SUBST(TM_MULTILIB_CONFIG)
6124 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
6125 AC_SUBST(extra_gcc_objs)
6126 AC_SUBST(user_headers_inc_next_pre)
6127 AC_SUBST(user_headers_inc_next_post)
6128 AC_SUBST(extra_headers_list)
6129 AC_SUBST(extra_objs)
6130 AC_SUBST(extra_programs)
6131 AC_SUBST(float_h_file)
6132 AC_SUBST(gcc_config_arguments)
6133 AC_SUBST(gcc_gxx_include_dir)
6134 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
6135 AC_SUBST(host_exeext)
6136 AC_SUBST(host_xm_file_list)
6137 AC_SUBST(host_xm_include_list)
6138 AC_SUBST(host_xm_defines)
6139 AC_SUBST(out_host_hook_obj)
6140 AC_SUBST(install)
6141 AC_SUBST(lang_opt_files)
6142 AC_SUBST(lang_specs_files)
6143 AC_SUBST(lang_tree_files)
6144 AC_SUBST(local_prefix)
6145 AC_SUBST(md_file)
6146 AC_SUBST(objc_boehm_gc)
6147 AC_SUBST(out_file)
6148 AC_SUBST(out_object_file)
6149 AC_SUBST(common_out_file)
6150 AC_SUBST(common_out_object_file)
6151 AC_SUBST(tm_file_list)
6152 AC_SUBST(tm_include_list)
6153 AC_SUBST(tm_defines)
6154 AC_SUBST(tm_p_file_list)
6155 AC_SUBST(tm_p_include_list)
6156 AC_SUBST(xm_file_list)
6157 AC_SUBST(xm_include_list)
6158 AC_SUBST(xm_defines)
6159 AC_SUBST(use_gcc_stdint)
6160 AC_SUBST(c_target_objs)
6161 AC_SUBST(cxx_target_objs)
6162 AC_SUBST(fortran_target_objs)
6163 AC_SUBST(target_cpu_default)
6164
6165 AC_SUBST_FILE(language_hooks)
6166
6167 # Echo link setup.
6168 if test x${build} = x${host} ; then
6169   if test x${host} = x${target} ; then
6170     echo "Links are now set up to build a native compiler for ${target}." 1>&2
6171   else
6172     echo "Links are now set up to build a cross-compiler" 1>&2
6173     echo " from ${host} to ${target}." 1>&2
6174   fi
6175 else
6176   if test x${host} = x${target} ; then
6177     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
6178     echo " for ${target}." 1>&2
6179   else
6180     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
6181     echo " from ${host} to ${target}." 1>&2
6182   fi
6183 fi
6184
6185 AC_ARG_VAR(GMPLIBS,[How to link GMP])
6186 AC_ARG_VAR(GMPINC,[How to find GMP include files])
6187
6188 AC_ARG_VAR(ISLLIBS,[How to link isl])
6189 AC_ARG_VAR(ISLINC,[How to find isl include files])
6190 if test "x${ISLLIBS}" != "x" ; then
6191    AC_DEFINE(HAVE_isl, 1, [Define if isl is in use.])
6192 fi
6193
6194 GCC_ENABLE_PLUGINS
6195 AC_SUBST(pluginlibs)
6196 AC_SUBST(enable_plugin)
6197 if test x"$enable_plugin" = x"yes"; then
6198   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
6199 fi
6200
6201
6202 # Enable --enable-host-shared
6203 AC_ARG_ENABLE(host-shared,
6204 [AS_HELP_STRING([--enable-host-shared],
6205                 [build host code as shared libraries])],
6206 [PICFLAG=-fPIC], [PICFLAG=])
6207 AC_SUBST(enable_host_shared)
6208 AC_SUBST(PICFLAG)
6209
6210
6211 AC_ARG_ENABLE(libquadmath-support,
6212 [AS_HELP_STRING([--disable-libquadmath-support],
6213   [disable libquadmath support for Fortran])],
6214 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
6215 ENABLE_LIBQUADMATH_SUPPORT=yes)
6216 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
6217   AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
6218             [Define to 1 to enable libquadmath support])
6219 fi
6220
6221
6222 # Specify what hash style to use by default.
6223 AC_ARG_WITH([linker-hash-style],
6224 [AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
6225                 [specify the linker hash style])],
6226 [case x"$withval" in
6227    xsysv)
6228      LINKER_HASH_STYLE=sysv
6229      ;;
6230    xgnu)
6231      LINKER_HASH_STYLE=gnu
6232      ;;
6233    xboth)
6234      LINKER_HASH_STYLE=both
6235      ;;
6236    *)
6237      AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
6238      ;;
6239  esac],
6240 [LINKER_HASH_STYLE=''])
6241 if test x"${LINKER_HASH_STYLE}" != x; then
6242   AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
6243                                          [The linker hash style])
6244 fi
6245
6246 # Specify what should be the default of -fdiagnostics-color option.
6247 AC_ARG_WITH([diagnostics-color],
6248 [AC_HELP_STRING([--with-diagnostics-color={never,auto,auto-if-env,always}],
6249                 [specify the default of -fdiagnostics-color option
6250                  auto-if-env stands for -fdiagnostics-color=auto if
6251                  GCC_COLOR environment variable is present and
6252                  -fdiagnostics-color=never otherwise])],
6253 [case x"$withval" in
6254    xnever)
6255      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_NO
6256      ;;
6257    xauto)
6258      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO
6259      ;;
6260    xauto-if-env)
6261      DIAGNOSTICS_COLOR_DEFAULT=-1
6262      ;;
6263    xalways)
6264      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_YES
6265      ;;
6266    *)
6267      AC_MSG_ERROR([$withval is an invalid option to --with-diagnostics-color])
6268      ;;
6269  esac],
6270 [DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO])
6271 AC_DEFINE_UNQUOTED(DIAGNOSTICS_COLOR_DEFAULT, $DIAGNOSTICS_COLOR_DEFAULT,
6272                    [The default for -fdiagnostics-color option])
6273
6274 # Generate gcc-driver-name.h containing GCC_DRIVER_NAME for the benefit
6275 # of jit/jit-playback.c.
6276 cat > gcc-driver-name.h <<EOF
6277 #define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_BASEVER}${exeext}"
6278 EOF
6279
6280 # Check whether --enable-default-pie was given.
6281 AC_ARG_ENABLE(default-pie,
6282 [AS_HELP_STRING([--enable-default-pie],
6283   [enable Position Independent Executable as default])],
6284 enable_default_pie=$enableval,
6285 enable_default_pie=no)
6286 if test x$enable_default_pie = xyes ; then
6287   AC_DEFINE(ENABLE_DEFAULT_PIE, 1,
6288       [Define if your target supports default PIE and it is enabled.])
6289 fi
6290 AC_SUBST([enable_default_pie])
6291
6292 # Check if -fno-PIE works.
6293 AC_CACHE_CHECK([for -fno-PIE option],
6294   [gcc_cv_c_no_fpie],
6295   [saved_CXXFLAGS="$CXXFLAGS"
6296    CXXFLAGS="$CXXFLAGS -fno-PIE"
6297    AC_COMPILE_IFELSE([int main(void) {return 0;}],
6298      [gcc_cv_c_no_fpie=yes],
6299      [gcc_cv_c_no_fpie=no])
6300    CXXFLAGS="$saved_CXXFLAGS"])
6301 if test "$gcc_cv_c_no_fpie" = "yes"; then
6302   NO_PIE_CFLAGS="-fno-PIE"
6303 fi
6304 AC_SUBST([NO_PIE_CFLAGS])
6305
6306 # Check if -no-pie works.
6307 AC_CACHE_CHECK([for -no-pie option],
6308   [gcc_cv_no_pie],
6309   [saved_LDFLAGS="$LDFLAGS"
6310    LDFLAGS="$LDFLAGS -no-pie"
6311    AC_LINK_IFELSE([int main(void) {return 0;}],
6312      [gcc_cv_no_pie=yes],
6313      [gcc_cv_no_pie=no])
6314    LDFLAGS="$saved_LDFLAGS"])
6315 if test "$gcc_cv_no_pie" = "yes"; then
6316   NO_PIE_FLAG="-no-pie"
6317 fi
6318 AC_SUBST([NO_PIE_FLAG])
6319
6320 # Check linker supports '-z bndplt'
6321 ld_bndplt_support=no
6322 AC_MSG_CHECKING(linker -z bndplt option)
6323 if test x"$ld_is_gold" = xno; then
6324   if test $in_tree_ld = yes ; then
6325     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
6326       ld_bndplt_support=yes
6327     fi
6328   elif test x$gcc_cv_ld != x; then
6329     # Check if linker supports -a bndplt option
6330     if $gcc_cv_ld --help 2>/dev/null | grep -- '-z bndplt' > /dev/null; then
6331       ld_bndplt_support=yes
6332     fi
6333   fi
6334 fi
6335 if test x"$ld_bndplt_support" = xyes; then
6336   AC_DEFINE(HAVE_LD_BNDPLT_SUPPORT, 1,
6337         [Define if your linker supports -z bndplt])
6338 fi
6339 AC_MSG_RESULT($ld_bndplt_support)
6340
6341 # Check linker supports '--push-state'/'--pop-state'
6342 ld_pushpopstate_support=no
6343 AC_MSG_CHECKING(linker --push-state/--pop-state options)
6344 if test x"$ld_is_gold" = xno; then
6345   if test $in_tree_ld = yes ; then
6346     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
6347       ld_pushpopstate_support=yes
6348     fi
6349   elif test x$gcc_cv_ld != x; then
6350     # Check if linker supports --push-state/--pop-state options
6351     if $gcc_cv_ld --help 2>/dev/null | grep -- '--push-state' > /dev/null; then
6352       ld_pushpopstate_support=yes
6353     fi
6354   fi
6355 fi
6356 if test x"$ld_pushpopstate_support" = xyes; then
6357   AC_DEFINE(HAVE_LD_PUSHPOPSTATE_SUPPORT, 1,
6358         [Define if your linker supports --push-state/--pop-state])
6359 fi
6360 AC_MSG_RESULT($ld_pushpopstate_support)
6361
6362 # Configure the subdirectories
6363 # AC_CONFIG_SUBDIRS($subdirs)
6364
6365 # Create the Makefile
6366 # and configure language subdirectories
6367 AC_CONFIG_FILES($all_outputs)
6368
6369 AC_CONFIG_COMMANDS([default],
6370 [
6371 case ${CONFIG_HEADERS} in
6372   *auto-host.h:config.in*)
6373   echo > cstamp-h ;;
6374 esac
6375 # Make sure all the subdirs exist.
6376 for d in $subdirs doc build common c-family
6377 do
6378     test -d $d || mkdir $d
6379 done
6380 ],
6381 [subdirs='$subdirs'])
6382 AC_OUTPUT
6383