gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   5 # 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   6
   7 #This file is part of GCC.
   8
   9 #GCC is free software; you can redistribute it and/or modify it under
  10 #the terms of the GNU General Public License as published by the Free
  11 #Software Foundation; either version 3, or (at your option) any later
  12 #version.
  13
  14 #GCC is distributed in the hope that it will be useful, but WITHOUT
  15 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 #FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 #for more details.
  18
  19 #You should have received a copy of the GNU General Public License
  20 #along with GCC; see the file COPYING3.  If not see
  21 #<http://www.gnu.org/licenses/>.
  22
  23 # --------------------------------
  24 # Initialization and sanity checks
  25 # --------------------------------
  26
  27 AC_PREREQ(2.64)
  28 AC_INIT
  29 AC_CONFIG_SRCDIR(tree.c)
  30 AC_CONFIG_HEADER(auto-host.h:config.in)
  31
  32 gcc_version=`cat $srcdir/BASE-VER`
  33
  34 # Determine the host, build, and target systems
  35 AC_CANONICAL_BUILD
  36 AC_CANONICAL_HOST
  37 AC_CANONICAL_TARGET
  38
  39 # Determine the noncanonical target name, for directory use.
  40 ACX_NONCANONICAL_TARGET
  41
  42 # Determine the target- and build-specific subdirectories
  43 GCC_TOPLEV_SUBDIRS
  44
  45 # Set program_transform_name
  46 AC_ARG_PROGRAM
  47
  48 # Check for bogus environment variables.
  49 # Test if LIBRARY_PATH contains the notation for the current directory
  50 # since this would lead to problems installing/building glibc.
  51 # LIBRARY_PATH contains the current directory if one of the following
  52 # is true:
  53 # - one of the terminals (":" and ";") is the first or last sign
  54 # - two terminals occur directly after each other
  55 # - the path contains an element with a dot in it
  56 AC_MSG_CHECKING(LIBRARY_PATH variable)
  57 changequote(,)dnl
  58 case ${LIBRARY_PATH} in
  59   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  60     library_path_setting="contains current directory"
  61     ;;
  62   *)
  63     library_path_setting="ok"
  64     ;;
  65 esac
  66 changequote([,])dnl
  67 AC_MSG_RESULT($library_path_setting)
  68 if test "$library_path_setting" != "ok"; then
  69 AC_MSG_ERROR([
  70 *** LIBRARY_PATH shouldn't contain the current directory when
  71 *** building gcc. Please change the environment variable
  72 *** and run configure again.])
  73 fi
  74
  75 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  76 # since this would lead to problems installing/building glibc.
  77 # GCC_EXEC_PREFIX contains the current directory if one of the following
  78 # is true:
  79 # - one of the terminals (":" and ";") is the first or last sign
  80 # - two terminals occur directly after each other
  81 # - the path contains an element with a dot in it
  82 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  83 changequote(,)dnl
  84 case ${GCC_EXEC_PREFIX} in
  85   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  86     gcc_exec_prefix_setting="contains current directory"
  87     ;;
  88   *)
  89     gcc_exec_prefix_setting="ok"
  90     ;;
  91 esac
  92 changequote([,])dnl
  93 AC_MSG_RESULT($gcc_exec_prefix_setting)
  94 if test "$gcc_exec_prefix_setting" != "ok"; then
  95 AC_MSG_ERROR([
  96 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
  97 *** building gcc. Please change the environment variable
  98 *** and run configure again.])
  99 fi
 100
 101 # -----------
 102 # Directories
 103 # -----------
 104
 105 # Specify the local prefix
 106 local_prefix=
 107 AC_ARG_WITH(local-prefix,
 108 [  --with-local-prefix=DIR specifies directory to put local include],
 109 [case "${withval}" in
 110 yes)    AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
 111 no)     ;;
 112 *)      local_prefix=$with_local_prefix ;;
 113 esac])
 114
 115 # Default local prefix if it is empty
 116 if test x$local_prefix = x; then
 117         local_prefix=/usr/local
 118 fi
 119
 120 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 121 # passed in by the toplevel make and thus we'd get different behavior
 122 # depending on where we built the sources.
 123 gcc_gxx_include_dir=
 124 # Specify the g++ header file directory
 125 AC_ARG_WITH(gxx-include-dir,
 126 [  --with-gxx-include-dir=DIR
 127                           specifies directory to put g++ header files],
 128 [case "${withval}" in
 129 yes)    AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
 130 no)     ;;
 131 *)      gcc_gxx_include_dir=$with_gxx_include_dir ;;
 132 esac])
 133
 134 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 135 if test x${gcc_gxx_include_dir} = x; then
 136   if test x${enable_version_specific_runtime_libs} = xyes; then
 137     gcc_gxx_include_dir='${libsubdir}/include/c++'
 138   else
 139     libstdcxx_incdir='include/c++/$(version)'
 140     if test x$host != x$target; then
 141        libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
 142     fi
 143     gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
 144   fi
 145 fi
 146
 147 AC_ARG_WITH(cpp_install_dir,
 148 [  --with-cpp-install-dir=DIR
 149                           install the user visible C preprocessor in DIR
 150                           (relative to PREFIX) as well as PREFIX/bin],
 151 [if test x$withval = xyes; then
 152   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 153 elif test x$withval != xno; then
 154   cpp_install_dir=$withval
 155 fi])
 156
 157 # We would like to our source tree to be readonly.  However when releases or
 158 # pre-releases are generated, the flex/bison generated files as well as the
 159 # various formats of manuals need to be included along with the rest of the
 160 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 161 # just that.
 162
 163 AC_MSG_CHECKING([whether to place generated files in the source directory])
 164   dnl generated-files-in-srcdir is disabled by default
 165   AC_ARG_ENABLE(generated-files-in-srcdir,
 166 [  --enable-generated-files-in-srcdir
 167                           put copies of generated files in source dir
 168                           intended for creating source tarballs for users
 169                           without texinfo bison or flex.],
 170       generated_files_in_srcdir=$enableval,
 171       generated_files_in_srcdir=no)
 172
 173 AC_MSG_RESULT($generated_files_in_srcdir)
 174
 175 if test "$generated_files_in_srcdir" = "yes"; then
 176   GENINSRC=''
 177 else
 178   GENINSRC='#'
 179 fi
 180 AC_SUBST(GENINSRC)
 181
 182 # -------------------
 183 # Find default linker
 184 # -------------------
 185
 186 # With GNU ld
 187 AC_ARG_WITH(gnu-ld,
 188 [  --with-gnu-ld           arrange to work with GNU ld.],
 189 gnu_ld_flag="$with_gnu_ld",
 190 gnu_ld_flag=no)
 191
 192 # With pre-defined ld
 193 AC_ARG_WITH(ld,
 194 [  --with-ld               arrange to use the specified ld (full pathname)],
 195 DEFAULT_LINKER="$with_ld")
 196 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 197   if test ! -x "$DEFAULT_LINKER"; then
 198     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 199   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 200     gnu_ld_flag=yes
 201   fi
 202   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 203         [Define to enable the use of a default linker.])
 204 fi
 205
 206 gnu_ld=`if test x"$gnu_ld_flag" = x"yes"; then echo 1; else echo 0; fi`
 207 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld, [Define if using GNU ld.])
 208
 209 AC_MSG_CHECKING([whether a default linker was specified])
 210 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 211   if test x"$gnu_ld_flag" = x"no"; then
 212     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 213   else
 214     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 215   fi
 216 else
 217   AC_MSG_RESULT(no)
 218 fi
 219
 220 # With demangler in GNU ld
 221 AC_ARG_WITH(demangler-in-ld,
 222 [  --with-demangler-in-ld  try to use demangler in GNU ld.],
 223 demangler_in_ld="$with_demangler_in_ld",
 224 demangler_in_ld=no)
 225
 226 # ----------------------
 227 # Find default assembler
 228 # ----------------------
 229
 230 # With GNU as
 231 AC_ARG_WITH(gnu-as,
 232 [  --with-gnu-as           arrange to work with GNU as],
 233 gas_flag="$with_gnu_as",
 234 gas_flag=no)
 235
 236 AC_ARG_WITH(as,
 237 [  --with-as               arrange to use the specified as (full pathname)],
 238 DEFAULT_ASSEMBLER="$with_as")
 239 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 240   if test ! -x "$DEFAULT_ASSEMBLER"; then
 241     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 242   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 243     gas_flag=yes
 244   fi
 245   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 246         [Define to enable the use of a default assembler.])
 247 fi
 248
 249 gnu_as=`if test x"$gas_flag" = x"yes"; then echo 1; else echo 0; fi`
 250 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as, [Define if using GNU as.])
 251
 252 AC_MSG_CHECKING([whether a default assembler was specified])
 253 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 254   if test x"$gas_flag" = x"no"; then
 255     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 256   else
 257     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 258   fi
 259 else
 260   AC_MSG_RESULT(no)
 261 fi
 262
 263 # ---------------
 264 # Find C compiler
 265 # ---------------
 266
 267 # If a non-executable a.out is present (e.g. created by GNU as above even if
 268 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 269 # file, even when creating an executable, so an execution test fails.
 270 # Remove possible default executable files to avoid this.
 271 #
 272 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 273 # Autoconf includes it.
 274 rm -f a.out a.exe b.out
 275
 276 # Find the native compiler
 277 AC_PROG_CC
 278 AM_PROG_CC_C_O
 279 AC_PROG_CXX
 280 ACX_PROG_GNAT([-I"$srcdir"/ada])
 281
 282 # autoconf is lame and doesn't give us any substitution variable for this.
 283 if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
 284   NO_MINUS_C_MINUS_O=yes
 285 else
 286   OUTPUT_OPTION='-o $@'
 287 fi
 288 AC_SUBST(NO_MINUS_C_MINUS_O)
 289 AC_SUBST(OUTPUT_OPTION)
 290
 291 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 292 # optimizations to be activated explicitly by the toplevel.
 293 case "$CC" in
 294   */prev-gcc/xgcc*) ;;
 295   *) CFLAGS=`echo $CFLAGS | sed "s/-O[[s0-9]]* *//" ` ;;
 296 esac
 297 AC_SUBST(CFLAGS)
 298
 299 # -------------------------
 300 # Check C compiler features
 301 # -------------------------
 302
 303 AC_USE_SYSTEM_EXTENSIONS
 304 AC_PROG_CPP
 305 AC_C_INLINE
 306
 307 # sizeof(char) is 1 by definition.
 308 AC_CHECK_SIZEOF(void *)
 309 AC_CHECK_SIZEOF(short)
 310 AC_CHECK_SIZEOF(int)
 311 AC_CHECK_SIZEOF(long)
 312 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 313 AC_CHECK_TYPES([__int64], [AC_CHECK_SIZEOF(__int64)])
 314 GCC_STDINT_TYPES
 315
 316 # ---------------------
 317 # Warnings and checking
 318 # ---------------------
 319
 320 # Check $CC warning features (if it's GCC).
 321 # We want to use -pedantic, but we don't want warnings about
 322 # * 'long long'
 323 # * variadic macros
 324 # * overlong strings
 325 # So, we only use -pedantic if we can disable those warnings.
 326
 327 ACX_PROG_CC_WARNING_OPTS(
 328         m4_quote(m4_do([-W -Wall -Wwrite-strings -Wcast-qual])), [loose_warn])
 329 ACX_PROG_CC_WARNING_OPTS(
 330         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
 331         [c_loose_warn])
 332 ACX_PROG_CC_WARNING_OPTS(
 333         m4_quote(m4_do([-Wmissing-format-attribute])), [strict_warn])
 334 ACX_PROG_CC_WARNING_OPTS(
 335         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 336 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC(
 337         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 338                        [-Wno-overlength-strings])), [strict_warn])
 339 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 340
 341 # The above macros do nothing if the compiler is not GCC.  However, the
 342 # Makefile has more goo to add other flags, so these variables are used
 343 # to enable warnings only for GCC.
 344 warn_cflags=
 345 warn_cxxflags=
 346 if test "x$GCC" = "xyes"; then
 347   warn_cflags='$(GCC_WARN_CFLAGS)'
 348   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 349 fi
 350 AC_SUBST(warn_cflags)
 351 AC_SUBST(warn_cxxflags)
 352
 353 # Enable expensive internal checks
 354 is_release=
 355 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 356   is_release=yes
 357 fi
 358
 359 AC_ARG_ENABLE(checking,
 360 [  --enable-checking[=LIST]
 361                           enable expensive run-time checks.  With LIST,
 362                           enable only specific categories of checks.
 363                           Categories are: yes,no,all,none,release.
 364                           Flags are: assert,df,fold,gc,gcac,gimple,misc,
 365                           rtlflag,rtl,runtime,tree,valgrind,types.],
 366 [ac_checking_flags="${enableval}"],[
 367 # Determine the default checks.
 368 if test x$is_release = x ; then
 369   ac_checking_flags=yes
 370 else
 371   ac_checking_flags=release
 372 fi])
 373 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 374 for check in release $ac_checking_flags
 375 do
 376         case $check in
 377         # these set all the flags to specific states
 378         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 379                         ac_fold_checking= ; ac_gc_checking=1 ;
 380                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 381                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 382                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 383                         ac_types_checking=1 ;;
 384         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 385                         ac_fold_checking= ; ac_gc_checking= ;
 386                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 387                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 388                         ac_tree_checking= ; ac_valgrind_checking= ;
 389                         ac_types_checking= ;;
 390         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 391                         ac_fold_checking=1 ; ac_gc_checking=1 ;
 392                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 393                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 394                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 395                         ac_types_checking=1 ;;
 396         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 397                         ac_fold_checking= ; ac_gc_checking= ;
 398                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 399                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 400                         ac_tree_checking= ; ac_valgrind_checking= ;
 401                         ac_types_checking= ;;
 402         # these enable particular checks
 403         assert)         ac_assert_checking=1 ;;
 404         df)             ac_df_checking=1 ;;
 405         fold)           ac_fold_checking=1 ;;
 406         gc)             ac_gc_checking=1 ;;
 407         gcac)           ac_gc_always_collect=1 ;;
 408         gimple)         ac_gimple_checking=1 ;;
 409         misc)           ac_checking=1 ;;
 410         rtl)            ac_rtl_checking=1 ;;
 411         rtlflag)        ac_rtlflag_checking=1 ;;
 412         runtime)        ac_runtime_checking=1 ;;
 413         tree)           ac_tree_checking=1 ;;
 414         types)          ac_types_checking=1 ;;
 415         valgrind)       ac_valgrind_checking=1 ;;
 416         *)      AC_MSG_ERROR(unknown check category $check) ;;
 417         esac
 418 done
 419 IFS="$ac_save_IFS"
 420
 421 nocommon_flag=""
 422 if test x$ac_checking != x ; then
 423   AC_DEFINE(ENABLE_CHECKING, 1,
 424 [Define if you want more run-time sanity checks.  This one gets a grab
 425    bag of miscellaneous but relatively cheap checks.])
 426   nocommon_flag=-fno-common
 427 fi
 428 AC_SUBST(nocommon_flag)
 429 if test x$ac_df_checking != x ; then
 430   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 431 [Define if you want more run-time sanity checks for dataflow.])
 432 fi
 433 if test x$ac_assert_checking != x ; then
 434   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 435 [Define if you want assertions enabled.  This is a cheap check.])
 436 fi
 437 if test x$ac_gimple_checking != x ; then
 438   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 439 [Define if you want operations on GIMPLE (the basic data structure of
 440 the high-level optimizers) to be checked for dynamic type safety at
 441 runtime.  This is moderately expensive.])
 442 fi
 443 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 444 if test x$ac_runtime_checking != x ; then
 445   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 446 [Define if you want runtime assertions enabled.  This is a cheap check.])
 447 fi
 448 if test x$ac_tree_checking != x ; then
 449   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 450 [Define if you want all operations on trees (the basic data
 451    structure of the front ends) to be checked for dynamic type safety
 452    at runtime.  This is moderately expensive.  The tree browser debugging
 453    routines will also be enabled by this option.
 454    ])
 455   TREEBROWSER=tree-browser.o
 456 fi
 457 if test x$ac_types_checking != x ; then
 458   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 459 [Define if you want all gimple types to be verified after gimplifiation.
 460    This is cheap.
 461    ])
 462 fi
 463 AC_SUBST(TREEBROWSER)
 464 if test x$ac_rtl_checking != x ; then
 465   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 466 [Define if you want all operations on RTL (the basic data structure
 467    of the optimizer and back end) to be checked for dynamic type safety
 468    at runtime.  This is quite expensive.])
 469 fi
 470 if test x$ac_rtlflag_checking != x ; then
 471   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 472 [Define if you want RTL flag accesses to be checked against the RTL
 473    codes that are supported for each access macro.  This is relatively
 474    cheap.])
 475 fi
 476 if test x$ac_gc_checking != x ; then
 477   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 478 [Define if you want the garbage collector to do object poisoning and
 479    other memory allocation checks.  This is quite expensive.])
 480 fi
 481 if test x$ac_gc_always_collect != x ; then
 482   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 483 [Define if you want the garbage collector to operate in maximally
 484    paranoid mode, validating the entire heap and collecting garbage at
 485    every opportunity.  This is extremely expensive.])
 486 fi
 487 if test x$ac_fold_checking != x ; then
 488   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 489 [Define if you want fold checked that it never destructs its argument.
 490    This is quite expensive.])
 491 fi
 492 valgrind_path_defines=
 493 valgrind_command=
 494
 495 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 496 dnl # an if statement.  This was the source of very frustrating bugs
 497 dnl # in converting to autoconf 2.5x!
 498 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 499
 500 if test x$ac_valgrind_checking != x ; then
 501   # It is certainly possible that there's valgrind but no valgrind.h.
 502   # GCC relies on making annotations so we must have both.
 503   AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 504   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 505     [[#include <valgrind/memcheck.h>
 506 #ifndef VALGRIND_DISCARD
 507 #error VALGRIND_DISCARD not defined
 508 #endif]])],
 509   [gcc_cv_header_valgrind_memcheck_h=yes],
 510   [gcc_cv_header_valgrind_memcheck_h=no])
 511   AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 512   AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 513   AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 514     [[#include <memcheck.h>
 515 #ifndef VALGRIND_DISCARD
 516 #error VALGRIND_DISCARD not defined
 517 #endif]])],
 518   [gcc_cv_header_memcheck_h=yes],
 519   [gcc_cv_header_memcheck_h=no])
 520   AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 521   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 522         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 523   if test "x$valgrind_path" = "x" \
 524     || (test $have_valgrind_h = no \
 525         && test $gcc_cv_header_memcheck_h = no \
 526         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 527         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 528   fi
 529   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 530   valgrind_command="$valgrind_path -q"
 531   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 532 [Define if you want to run subprograms and generated programs
 533    through valgrind (a memory checker).  This is extremely expensive.])
 534   if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 535     AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 536         [Define if valgrind's valgrind/memcheck.h header is installed.])
 537   fi
 538   if test $gcc_cv_header_memcheck_h = yes; then
 539     AC_DEFINE(HAVE_MEMCHECK_H, 1,
 540         [Define if valgrind's memcheck.h header is installed.])
 541   fi
 542 fi
 543 AC_SUBST(valgrind_path_defines)
 544 AC_SUBST(valgrind_command)
 545
 546 # Enable code coverage collection
 547 AC_ARG_ENABLE(coverage,
 548 [  --enable-coverage[=LEVEL]
 549                           enable compiler's code coverage collection.
 550                           Use to measure compiler performance and locate
 551                           unused parts of the compiler. With LEVEL, specify
 552                           optimization. Values are opt, noopt,
 553                           default is noopt],
 554 [case "${enableval}" in
 555   yes|noopt)
 556     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
 557     ;;
 558   opt)
 559     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
 560     ;;
 561   no)
 562     # a.k.a. --disable-coverage
 563     coverage_flags=""
 564     ;;
 565   *)
 566     AC_MSG_ERROR(unknown coverage setting $enableval)
 567     ;;
 568 esac],
 569 [coverage_flags=""])
 570 AC_SUBST(coverage_flags)
 571
 572 AC_ARG_ENABLE(gather-detailed-mem-stats,
 573 [  --enable-gather-detailed-mem-stats         enable detailed memory allocation stats gathering], [],
 574 [enable_gather_detailed_mem_stats=no])
 575 if test x$enable_gather_detailed_mem_stats = xyes ; then
 576   AC_DEFINE(GATHER_STATISTICS, 1,
 577         [Define to enable detailed memory allocation stats gathering.])
 578 fi
 579
 580 # -------------------------------
 581 # Miscenalleous configure options
 582 # -------------------------------
 583
 584 # See if we are building gcc with C++.
 585 AC_ARG_ENABLE(build-with-cxx,
 586 [  --enable-build-with-cxx build with C++ compiler instead of C compiler],
 587 ENABLE_BUILD_WITH_CXX=$enableval,
 588 ENABLE_BUILD_WITH_CXX=no)
 589 AC_SUBST(ENABLE_BUILD_WITH_CXX)
 590
 591 # With stabs
 592 AC_ARG_WITH(stabs,
 593 [  --with-stabs            arrange to use stabs instead of host debug format],
 594 stabs="$with_stabs",
 595 stabs=no)
 596
 597 # Determine whether or not multilibs are enabled.
 598 AC_ARG_ENABLE(multilib,
 599 [  --enable-multilib       enable library support for multiple ABIs],
 600 [], [enable_multilib=yes])
 601 AC_SUBST(enable_multilib)
 602
 603 # Enable __cxa_atexit for C++.
 604 AC_ARG_ENABLE(__cxa_atexit,
 605 [  --enable-__cxa_atexit   enable __cxa_atexit for C++],
 606 [], [])
 607
 608 # Enable C extension for decimal float if target supports it.
 609 AC_ARG_ENABLE(decimal-float,
 610 [  --enable-decimal-float={no,yes,bid,dpd}
 611                         enable decimal float extension to C.  Selecting 'bid'
 612                         or 'dpd' choses which decimal floating point format
 613                         to use],
 614 [
 615   case $enable_decimal_float in
 616     yes | no | bid | dpd) ;;
 617     *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
 618 Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
 619   esac
 620 ],
 621 [
 622   case $target in
 623     powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
 624       enable_decimal_float=yes
 625       ;;
 626     *)
 627       AC_MSG_WARN(decimal float is not supported for this target, ignored)
 628       enable_decimal_float=no
 629       ;;
 630   esac
 631 ])
 632
 633 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 634 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 635 [Define to 1 to enable decimal float extension to C.])
 636
 637 # x86's use BID format instead of DPD
 638 case x$enable_decimal_float in
 639   xyes)
 640     case $target in
 641       i?86*-*-linux* | x86_64*-*-linux*)
 642         enable_decimal_float=bid
 643         ;;
 644       *)
 645         enable_decimal_float=dpd
 646         ;;
 647     esac
 648     ;;
 649   xno)
 650     # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
 651     # dependency on libdecnumber.
 652     enable_decimal_float=dpd
 653     ;;
 654 esac
 655 AC_SUBST(enable_decimal_float)
 656
 657 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 658 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 659 [Define to 1 to specify that we are using the BID decimal floating
 660 point format instead of DPD])
 661
 662 # Enable C extension for fixed-point arithmetic.
 663 AC_ARG_ENABLE(fixed-point,
 664 [  --enable-fixed-point    enable fixed-point arithmetic extension to C],
 665 [
 666 ],
 667 [
 668   case $target in
 669     mips*-*-*)
 670       case $host in
 671         mips*-sgi-irix*)
 672           AC_MSG_WARN(fixed-point is not supported on IRIX, ignored)
 673           enable_fixed_point=no
 674           ;;
 675         *)
 676           enable_fixed_point=yes
 677           ;;
 678       esac
 679       ;;
 680     *)
 681       AC_MSG_WARN(fixed-point is not supported for this target, ignored)
 682       enable_fixed_point=no
 683       ;;
 684   esac
 685 ])
 686 AC_SUBST(enable_fixed_point)
 687
 688 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 689 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 690 [Define to 1 to enable fixed-point arithmetic extension to C.])
 691
 692 # Enable threads
 693 # Pass with no value to take the default
 694 # Pass with a value to specify a thread package
 695 AC_ARG_ENABLE(threads,
 696 [  --enable-threads        enable thread usage for target GCC
 697   --enable-threads=LIB    use LIB thread package for target GCC],,
 698 [enable_threads=''])
 699
 700 AC_ARG_ENABLE(tls,
 701 [  --enable-tls            enable or disable generation of tls code
 702                           overriding the assembler check for tls support],
 703 [
 704   case $enable_tls in
 705     yes | no) ;;
 706     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 707 Valid choices are 'yes' and 'no'.]) ;;
 708   esac
 709 ], [enable_tls=''])
 710
 711 AC_ARG_ENABLE(objc-gc,
 712 [  --enable-objc-gc       enable the use of Boehm's garbage collector with
 713                           the GNU Objective-C runtime],
 714 if test x$enable_objc_gc = xno; then
 715         objc_boehm_gc=''
 716 else
 717         objc_boehm_gc=1
 718 fi,
 719 objc_boehm_gc='')
 720
 721 AC_ARG_WITH(dwarf2,
 722 [  --with-dwarf2           force the default debug format to be DWARF 2],
 723 dwarf2="$with_dwarf2",
 724 dwarf2=no)
 725
 726 AC_ARG_ENABLE(shared,
 727 [  --disable-shared        don't provide a shared libgcc],
 728 [
 729   case $enable_shared in
 730   yes | no) ;;
 731   *)
 732     enable_shared=no
 733     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 734     for pkg in $enableval; do
 735       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 736         enable_shared=yes
 737       fi
 738     done
 739     IFS="$ac_save_ifs"
 740     ;;
 741   esac
 742 ], [enable_shared=yes])
 743 AC_SUBST(enable_shared)
 744
 745 AC_ARG_WITH(build-sysroot,
 746   [  --with-build-sysroot=sysroot
 747                           use sysroot as the system root during the build])
 748
 749 AC_ARG_WITH(sysroot,
 750 [  --with-sysroot[=DIR] Search for usr/lib, usr/include, et al, within DIR.],
 751 [
 752  case ${with_sysroot} in
 753  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 754  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 755  esac
 756
 757  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 758  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 759
 760  if test "x$prefix" = xNONE; then
 761   test_prefix=/usr/local
 762  else
 763   test_prefix=$prefix
 764  fi
 765  if test "x$exec_prefix" = xNONE; then
 766   test_exec_prefix=$test_prefix
 767  else
 768   test_exec_prefix=$exec_prefix
 769  fi
 770  case ${TARGET_SYSTEM_ROOT} in
 771  "${test_prefix}"|"${test_prefix}/"*|\
 772  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 773  '${prefix}'|'${prefix}/'*|\
 774  '${exec_prefix}'|'${exec_prefix}/'*)
 775    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 776    TARGET_SYSTEM_ROOT_DEFINE="$t"
 777    ;;
 778  esac
 779 ], [
 780  TARGET_SYSTEM_ROOT=
 781  TARGET_SYSTEM_ROOT_DEFINE=
 782  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 783 ])
 784 AC_SUBST(TARGET_SYSTEM_ROOT)
 785 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 786 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 787
 788 AC_ARG_WITH(specs,
 789   [AS_HELP_STRING([--with-specs=SPECS],
 790                   [add SPECS to driver command-line processing])],
 791   [CONFIGURE_SPECS=$withval],
 792   [CONFIGURE_SPECS=]
 793 )
 794 AC_SUBST(CONFIGURE_SPECS)
 795
 796 # Build with intermodule optimisations
 797 AC_ARG_ENABLE(intermodule,
 798 [  --enable-intermodule    build the compiler in one step],
 799 [case ${enable_intermodule} in
 800   yes) onestep="-onestep";;
 801   *) onestep="";;
 802 esac],
 803 [onestep=""])
 804 AC_SUBST(onestep)
 805
 806 ACX_PKGVERSION([GCC])
 807 ACX_BUGURL([http://gcc.gnu.org/bugs.html])
 808
 809 # Sanity check enable_languages in case someone does not run the toplevel
 810 # configure # script.
 811 AC_ARG_ENABLE(languages,
 812 [  --enable-languages=LIST specify which front-ends to build],
 813 [case ,${enable_languages}, in
 814        ,,|,yes,)
 815                 # go safe -- we cannot be much sure without the toplevel
 816                 # configure's
 817                 # analysis of which target libs are present and usable
 818                 enable_languages=c
 819                 ;;
 820          *,all,*)
 821                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 822                 ;;
 823         *,c,*)
 824                 ;;
 825         *)
 826                 enable_languages=c,${enable_languages}
 827                 ;;
 828 esac],
 829 [enable_languages=c])
 830
 831 AC_ARG_WITH(multilib-list,
 832 [  --with-multilib-list    Select multilibs (SH only)],
 833 :,
 834 with_multilib_list=default)
 835
 836 # -------------------------
 837 # Checks for other programs
 838 # -------------------------
 839
 840 AC_PROG_MAKE_SET
 841
 842 # Find some useful tools
 843 AC_PROG_AWK
 844 # We need awk to create options.c and options.h.
 845 # Bail out if it's missing.
 846 case ${AWK} in
 847   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
 848 esac
 849
 850 gcc_AC_PROG_LN_S
 851 ACX_PROG_LN($LN_S)
 852 AC_PROG_RANLIB
 853 case "${host}" in
 854 *-*-darwin*)
 855   # By default, the Darwin ranlib will not treat common symbols as
 856   # definitions when  building the archive table of contents.  Other
 857   # ranlibs do that; pass an option to the Darwin ranlib that makes
 858   # it behave similarly.
 859   ranlib_flags="-c"
 860   ;;
 861 *)
 862   ranlib_flags=""
 863 esac
 864 AC_SUBST(ranlib_flags)
 865
 866 gcc_AC_PROG_INSTALL
 867
 868 # See if cmp has --ignore-initial.
 869 gcc_AC_PROG_CMP_IGNORE_INITIAL
 870
 871 # See if we have the mktemp command.
 872 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
 873
 874 # See if makeinfo has been installed and is modern enough
 875 # that we can use it.
 876 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
 877   [GNU texinfo.* \([0-9][0-9.]*\)],
 878   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
 879 if test $gcc_cv_prog_makeinfo_modern = no; then
 880   AC_MSG_WARN([
 881 *** Makeinfo is missing or too old.
 882 *** Info documentation will not be built.])
 883   BUILD_INFO=
 884 else
 885   BUILD_INFO=info
 886 fi
 887 AC_SUBST(BUILD_INFO)
 888
 889 # Is pod2man recent enough to regenerate manpages?
 890 AC_MSG_CHECKING([for recent Pod::Man])
 891 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
 892   AC_MSG_RESULT(yes)
 893   GENERATED_MANPAGES=generated-manpages
 894 else
 895   AC_MSG_RESULT(no)
 896   GENERATED_MANPAGES=
 897 fi
 898 AC_SUBST(GENERATED_MANPAGES)
 899
 900 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
 901
 902 # How about lex?
 903 dnl Don't use AC_PROG_LEX; we insist on flex.
 904 dnl LEXLIB is not useful in gcc.
 905 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
 906
 907 # Bison?
 908 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
 909
 910 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
 911 # check for build == host before using them.
 912
 913 # NM
 914 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
 915   && test -d ../binutils ; then
 916   NM='$(objdir)/../binutils/nm-new'
 917 else
 918   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
 919 fi
 920
 921 # AR
 922 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
 923   && test -d ../binutils ; then
 924   AR='$(objdir)/../binutils/ar'
 925 else
 926   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
 927 fi
 928
 929
 930 # --------------------
 931 # Checks for C headers
 932 # --------------------
 933
 934 # Need to reject headers which give warnings, so that the -Werror bootstrap
 935 # works later. *sigh*  This needs to come before all header checks.
 936 AC_PROG_CPP_WERROR
 937
 938 AC_HEADER_STDC
 939 AC_HEADER_TIME
 940 ACX_HEADER_STRING
 941 AC_HEADER_SYS_WAIT
 942 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
 943                  fcntl.h unistd.h sys/file.h sys/time.h sys/mman.h \
 944                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
 945                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
 946
 947 # Check for thread headers.
 948 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
 949 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
 950
 951 # These tests can't be done till we know if we have limits.h.
 952 gcc_AC_C_CHAR_BIT
 953 AC_C_BIGENDIAN
 954
 955 # --------
 956 # UNSORTED
 957 # --------
 958
 959
 960 # These libraries may be used by collect2.
 961 # We may need a special search path to get them linked.
 962 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
 963 [save_LIBS="$LIBS"
 964 for libs in '' -lld -lmld \
 965                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
 966                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
 967 do
 968         LIBS="$libs"
 969         AC_TRY_LINK_FUNC(ldopen,
 970                 [gcc_cv_collect2_libs="$libs"; break])
 971 done
 972 LIBS="$save_LIBS"
 973 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
 974 case $gcc_cv_collect2_libs in
 975         "none required")        ;;
 976         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
 977 esac
 978 AC_SUBST(COLLECT2_LIBS)
 979
 980 # When building Ada code on Alpha, we need exc_resume which is usually in
 981 # -lexc.  So test for it.
 982 save_LIBS="$LIBS"
 983 LIBS=
 984 AC_SEARCH_LIBS(exc_resume, exc)
 985 GNAT_LIBEXC="$LIBS"
 986 LIBS="$save_LIBS"
 987 AC_SUBST(GNAT_LIBEXC)
 988
 989 # Some systems put ldexp and frexp in libm instead of libc; assume
 990 # they're both in the same place.  jcf-dump needs them.
 991 save_LIBS="$LIBS"
 992 LIBS=
 993 AC_SEARCH_LIBS(ldexp, m)
 994 LDEXP_LIB="$LIBS"
 995 LIBS="$save_LIBS"
 996 AC_SUBST(LDEXP_LIB)
 997
 998 # Use <inttypes.h> only if it exists,
 999 # doesn't clash with <sys/types.h>, and declares intmax_t.
1000 AC_MSG_CHECKING(for inttypes.h)
1001 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1002 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1003 [[#include <sys/types.h>
1004 #include <inttypes.h>]],
1005   [[intmax_t i = -1;]])],
1006   [gcc_cv_header_inttypes_h=yes],
1007   [gcc_cv_header_inttypes_h=no])])
1008 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1009 if test $gcc_cv_header_inttypes_h = yes; then
1010   AC_DEFINE(HAVE_INTTYPES_H, 1,
1011         [Define if you have a working <inttypes.h> header file.])
1012 fi
1013
1014 dnl Disabled until we have a complete test for buggy enum bitfields.
1015 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1016
1017 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1018   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1019   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1020   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1021   putchar_unlocked putc_unlocked)
1022 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
1023         sysconf strsignal getrusage nl_langinfo \
1024         gettimeofday mbstowcs wcswidth mmap mincore setlocale \
1025         gcc_UNLOCKED_FUNCS)
1026
1027 if test x$ac_cv_func_mbstowcs = xyes; then
1028   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1029 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1030 int main()
1031 {
1032   mbstowcs(0, "", 0);
1033   return 0;
1034 }]])],
1035     [gcc_cv_func_mbstowcs_works=yes],
1036     [gcc_cv_func_mbstowcs_works=no],
1037     [gcc_cv_func_mbstowcs_works=yes])])
1038   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1039     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1040   [Define this macro if mbstowcs does not crash when its
1041    first argument is NULL.])
1042   fi
1043 fi
1044
1045 AC_CHECK_TYPE(ssize_t, int)
1046 AC_CHECK_TYPE(caddr_t, char *)
1047
1048 gcc_AC_FUNC_MMAP_BLACKLIST
1049
1050 case "${host}" in
1051 *-*-*vms*)
1052   # Under VMS, vfork works very differently than on Unix. The standard test
1053   # won't work, and it isn't easily adaptable. It makes more sense to
1054   # just force it.
1055   ac_cv_func_vfork_works=yes
1056   ;;
1057 esac
1058 AC_FUNC_FORK
1059
1060 AM_ICONV
1061 # Until we have in-tree GNU iconv:
1062 LIBICONV_DEP=
1063 AC_SUBST(LIBICONV_DEP)
1064
1065 AM_LC_MESSAGES
1066
1067 AM_LANGINFO_CODESET
1068
1069 # We will need to find libiberty.h and ansidecl.h
1070 saved_CFLAGS="$CFLAGS"
1071 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
1072 gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
1073         strsignal strstr strverscmp \
1074         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1075         free basename getopt clock getpagesize gcc_UNLOCKED_FUNCS, , ,[
1076 #include "ansidecl.h"
1077 #include "system.h"])
1078
1079 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1080 #include "ansidecl.h"
1081 #include "system.h"
1082 #ifdef HAVE_SYS_RESOURCE_H
1083 #include <sys/resource.h>
1084 #endif
1085 ])
1086
1087 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1088 #include "ansidecl.h"
1089 #include "system.h"
1090 #ifdef HAVE_SYS_RESOURCE_H
1091 #include <sys/resource.h>
1092 #endif
1093 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1094 [Define to `long' if <sys/resource.h> doesn't define.])])
1095
1096 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1097 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1098 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1099 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1100 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1101 #include "ansidecl.h"
1102 #include "system.h"
1103 #ifdef HAVE_LDFCN_H
1104 #undef FREAD
1105 #undef FWRITE
1106 #include <ldfcn.h>
1107 #endif
1108 ])
1109
1110 gcc_AC_CHECK_DECLS(times, , ,[
1111 #include "ansidecl.h"
1112 #include "system.h"
1113 #ifdef HAVE_SYS_TIMES_H
1114 #include <sys/times.h>
1115 #endif
1116 ])
1117
1118 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1119 #include "ansidecl.h"
1120 #include "system.h"
1121 #include <signal.h>
1122 ])
1123
1124 # More time-related stuff.
1125 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1126 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1127 #include "ansidecl.h"
1128 #include "system.h"
1129 #ifdef HAVE_SYS_TIMES_H
1130 #include <sys/times.h>
1131 #endif
1132 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1133 if test $ac_cv_struct_tms = yes; then
1134   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1135   [Define if <sys/times.h> defines struct tms.])
1136 fi
1137
1138 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1139 # revisit after autoconf 2.50.
1140 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1141 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1142 #include "ansidecl.h"
1143 #include "system.h"
1144 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1145 if test $gcc_cv_type_clock_t = yes; then
1146   AC_DEFINE(HAVE_CLOCK_T, 1,
1147   [Define if <time.h> defines clock_t.])
1148 fi
1149
1150 # Restore CFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1151 CFLAGS="$saved_CFLAGS"
1152
1153 gcc_AC_INITFINI_ARRAY
1154
1155 # mkdir takes a single argument on some systems.
1156 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1157
1158 # File extensions
1159 manext='.1'
1160 objext='.o'
1161 AC_SUBST(manext)
1162 AC_SUBST(objext)
1163
1164 # With Setjmp/Longjmp based exception handling.
1165 AC_ARG_ENABLE(sjlj-exceptions,
1166 [  --enable-sjlj-exceptions
1167                           arrange to use setjmp/longjmp exception handling],
1168 [case $target in
1169   *-*-hpux10*)
1170     if test $enableval != yes; then
1171       AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1172       enableval=yes
1173     fi
1174     ;;
1175 esac
1176 force_sjlj_exceptions=yes],
1177 [case $target in
1178   *-*-hpux10*)
1179     force_sjlj_exceptions=yes
1180     enableval=yes
1181     ;;
1182   *)
1183     force_sjlj_exceptions=no
1184     ;;
1185 esac])
1186 if test $force_sjlj_exceptions = yes; then
1187   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1188   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1189     [Define 0/1 to force the choice for exception handling model.])
1190 fi
1191
1192 # For platforms with the unwind ABI which includes an unwind library,
1193 # libunwind, we can choose to use the system libunwind.
1194 # config.gcc also contains tests of with_system_libunwind.
1195 GCC_CHECK_UNWIND_GETIPINFO
1196
1197 # --------------------------------------------------------
1198 # Build, host, and target specific configuration fragments
1199 # --------------------------------------------------------
1200
1201 # Collect build-machine-specific information.
1202 . ${srcdir}/config.build
1203
1204 # Collect host-machine-specific information.
1205 . ${srcdir}/config.host
1206
1207 target_gtfiles=
1208
1209 # Collect target-machine-specific information.
1210 . ${srcdir}/config.gcc
1211
1212 extra_objs="${host_extra_objs} ${extra_objs}"
1213 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1214
1215 # Default the target-machine variables that were not explicitly set.
1216 if test x"$tm_file" = x
1217 then tm_file=$cpu_type/$cpu_type.h; fi
1218
1219 if test x"$extra_headers" = x
1220 then extra_headers=; fi
1221
1222 if test x$md_file = x
1223 then md_file=$cpu_type/$cpu_type.md; fi
1224
1225 if test x$out_file = x
1226 then out_file=$cpu_type/$cpu_type.c; fi
1227
1228 if test x"$tmake_file" = x
1229 then tmake_file=$cpu_type/t-$cpu_type
1230 fi
1231
1232 if test x"$dwarf2" = xyes
1233 then tm_file="$tm_file tm-dwarf2.h"
1234 fi
1235
1236 # Say what files are being used for the output code and MD file.
1237 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1238 echo "Using \`$srcdir/config/$md_file' as machine description file."
1239
1240 # If any of the xm_file variables contain nonexistent files, warn
1241 # about them and drop them.
1242
1243 bx=
1244 for x in $build_xm_file; do
1245   if    test -f $srcdir/config/$x
1246   then      bx="$bx $x"
1247   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1248   fi
1249 done
1250 build_xm_file="$bx"
1251
1252 hx=
1253 for x in $host_xm_file; do
1254   if    test -f $srcdir/config/$x
1255   then      hx="$hx $x"
1256   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1257   fi
1258 done
1259 host_xm_file="$hx"
1260
1261 tx=
1262 for x in $xm_file; do
1263   if    test -f $srcdir/config/$x
1264   then      tx="$tx $x"
1265   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1266   fi
1267 done
1268 xm_file="$tx"
1269
1270 count=a
1271 for f in $tm_file; do
1272         count=${count}x
1273 done
1274 if test $count = ax; then
1275         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1276 else
1277         echo "Using the following target machine macro files:"
1278         for f in $tm_file; do
1279                 echo "  $srcdir/config/$f"
1280         done
1281 fi
1282
1283 if test x$need_64bit_hwint = xyes; then
1284         AC_DEFINE(NEED_64BIT_HOST_WIDE_INT, 1,
1285 [Define to 1 if HOST_WIDE_INT must be 64 bits wide (see hwint.h).])
1286 fi
1287
1288 if test x$use_long_long_for_widest_fast_int = xyes; then
1289         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1290 [Define to 1 if the 'long long' (or '__int64') is wider than 'long' but still
1291 efficiently supported by the host hardware.])
1292 fi
1293
1294 count=a
1295 for f in $host_xm_file; do
1296         count=${count}x
1297 done
1298 if test $count = a; then
1299         :
1300 elif test $count = ax; then
1301         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1302 else
1303         echo "Using the following host machine macro files:"
1304         for f in $host_xm_file; do
1305                 echo "  $srcdir/config/$f"
1306         done
1307 fi
1308 echo "Using ${out_host_hook_obj} for host machine hooks."
1309
1310 if test "$host_xm_file" != "$build_xm_file"; then
1311         count=a
1312         for f in $build_xm_file; do
1313                 count=${count}x
1314         done
1315         if test $count = a; then
1316                 :
1317         elif test $count = ax; then
1318                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1319         else
1320                 echo "Using the following build machine macro files:"
1321                 for f in $build_xm_file; do
1322                         echo "  $srcdir/config/$f"
1323                 done
1324         fi
1325 fi
1326
1327 case ${host} in
1328   powerpc*-*-darwin*)
1329     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1330       gcc_cv_mcontext_underscores,
1331       AC_COMPILE_IFELSE([
1332 #include <sys/cdefs.h>
1333 #include <sys/signal.h>
1334 #include <ucontext.h>
1335 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1336 ],
1337         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1338       if test $gcc_cv_mcontext_underscores = yes; then
1339         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1340           [mcontext_t fields start with __])
1341       fi
1342     ;;
1343 esac
1344
1345 # ---------
1346 # Threading
1347 # ---------
1348
1349 # Check if a valid thread package
1350 case ${enable_threads} in
1351   "" | no)
1352     # No threads
1353     target_thread_file='single'
1354     ;;
1355   yes)
1356     # default
1357     target_thread_file='single'
1358     ;;
1359   aix | dce | gnat | irix | posix | posix95 | rtems | \
1360   single | solaris | vxworks | win32 | mipssde)
1361     target_thread_file=${enable_threads}
1362     ;;
1363   *)
1364     echo "${enable_threads} is an unknown thread package" 1>&2
1365     exit 1
1366     ;;
1367 esac
1368
1369 if test x${thread_file} = x; then
1370   # No thread file set by target-specific clauses in config.gcc,
1371   # so use file chosen by default logic above
1372   thread_file=${target_thread_file}
1373 fi
1374
1375 # Make gthr-default.h if we have a thread file.
1376 gthread_flags=
1377 if test $thread_file != single; then
1378   echo "#include \"gthr-${thread_file}.h\"" > gthr-default.h-t
1379   if diff gthr-default.h-t gthr-default.h 2>/dev/null; then
1380     rm -f gthr-default.h-t
1381   else
1382     mv -f gthr-default.h-t gthr-default.h
1383   fi
1384   gthread_flags=-DHAVE_GTHR_DEFAULT
1385 fi
1386 AC_SUBST(gthread_flags)
1387
1388 # --------
1389 # UNSORTED
1390 # --------
1391
1392 use_cxa_atexit=no
1393 if test x$enable___cxa_atexit = xyes || \
1394    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1395   if test x$host = x$target; then
1396     case $host in
1397       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1398       # keyed to flag_use_cxa_atexit
1399       *-*-mingw32*)
1400         use_cxa_atexit=yes
1401         ;;
1402       *)
1403         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1404           [echo "__cxa_atexit can't be enabled on this target"])
1405         ;;
1406     esac
1407   else
1408     # We can't check for __cxa_atexit when building a cross, so assume
1409     # it is available
1410     use_cxa_atexit=yes
1411   fi
1412   if test x$use_cxa_atexit = xyes; then
1413     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1414       [Define if you want to use __cxa_atexit, rather than atexit, to
1415       register C++ destructors for local statics and global objects.
1416       This is essential for fully standards-compliant handling of
1417       destructors, but requires __cxa_atexit in libc.])
1418   fi
1419 fi
1420
1421 # Look for a file containing extra machine modes.
1422 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1423   extra_modes_file='$(srcdir)'/config/${extra_modes}
1424   AC_SUBST(extra_modes_file)
1425   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1426   [Define to the name of a file containing a list of extra machine modes
1427    for this architecture.])
1428 fi
1429
1430 # Convert extra_options into a form suitable for Makefile use.
1431 extra_opt_files=
1432 for f in $extra_options; do
1433   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1434 done
1435 AC_SUBST(extra_opt_files)
1436
1437 # auto-host.h is the file containing items generated by autoconf and is
1438 # the first file included by config.h.
1439 # If host=build, it is correct to have bconfig include auto-host.h
1440 # as well.  If host!=build, we are in error and need to do more
1441 # work to find out the build config parameters.
1442 if test x$host = x$build
1443 then
1444         build_auto=auto-host.h
1445 else
1446         # We create a subdir, then run autoconf in the subdir.
1447         # To prevent recursion we set host and build for the new
1448         # invocation of configure to the build for this invocation
1449         # of configure.
1450         tempdir=build.$$
1451         rm -rf $tempdir
1452         mkdir $tempdir
1453         cd $tempdir
1454         case ${srcdir} in
1455         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1456         *) realsrcdir=../${srcdir};;
1457         esac
1458         saved_CFLAGS="${CFLAGS}"
1459         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1460         LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1461         ${realsrcdir}/configure \
1462                 --enable-languages=${enable_languages-all} \
1463                 --target=$target_alias --host=$build_alias --build=$build_alias
1464         CFLAGS="${saved_CFLAGS}"
1465
1466         # We just finished tests for the build machine, so rename
1467         # the file auto-build.h in the gcc directory.
1468         mv auto-host.h ../auto-build.h
1469         cd ..
1470         rm -rf $tempdir
1471         build_auto=auto-build.h
1472 fi
1473 AC_SUBST(build_subdir)
1474
1475 tm_file="${tm_file} defaults.h"
1476 tm_p_file="${tm_p_file} tm-preds.h"
1477 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1478 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1479 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1480 # put this back in temporarily.
1481 xm_file="auto-host.h ansidecl.h ${xm_file}"
1482
1483 # --------
1484 # UNSORTED
1485 # --------
1486
1487 changequote(,)dnl
1488 # Compile in configure arguments.
1489 if test -f configargs.h ; then
1490         # Being re-configured.
1491         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1492         gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1493 else
1494         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1495 fi
1496
1497 # Double all backslashes and backslash all quotes to turn
1498 # gcc_config_arguments into a C string.
1499 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1500 $gcc_config_arguments
1501 EOF
1502 gcc_config_arguments_str=`cat conftest.out`
1503 rm -f conftest.out
1504
1505 cat > configargs.h <<EOF
1506 /* Generated automatically. */
1507 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1508 static const char thread_model[] = "$thread_file";
1509
1510 static const struct {
1511   const char *name, *value;
1512 } configure_default_options[] = $configure_default_options;
1513 EOF
1514 changequote([,])dnl
1515
1516 changequote(,)dnl
1517 gcc_BASEVER=`cat $srcdir/BASE-VER`
1518 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1519 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1520 if test -f $srcdir/REVISION ; then
1521         gcc_REVISION=`cat $srcdir/REVISION`
1522 else
1523         gcc_REVISION=""
1524 fi
1525 cat > plugin-version.h <<EOF
1526 #include "configargs.h"
1527
1528 static char basever[] = "$gcc_BASEVER";
1529 static char datestamp[] = "$gcc_DATESTAMP";
1530 static char devphase[] = "$gcc_DEVPHASE";
1531 static char revision[] = "$gcc_REVISION";
1532
1533 /* FIXME plugins: We should make the version information more precise.
1534    One way to do is to add a checksum. */
1535
1536 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1537                                                 devphase, revision,
1538                                                 configuration_arguments};
1539 EOF
1540 changequote([,])dnl
1541
1542 # Internationalization
1543 ZW_GNU_GETTEXT_SISTER_DIR
1544
1545 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1546 # -liconv on the link line twice.
1547 case "$LIBINTL" in *$LIBICONV*)
1548         LIBICONV= ;;
1549 esac
1550
1551 AC_ARG_ENABLE(secureplt,
1552 [  --enable-secureplt      enable -msecure-plt by default for PowerPC],
1553 [], [])
1554
1555 AC_ARG_ENABLE(cld,
1556 [  --enable-cld            enable -mcld by default for 32bit x86], [],
1557 [enable_cld=no])
1558
1559 # Windows32 Registry support for specifying GCC installation paths.
1560 AC_ARG_ENABLE(win32-registry,
1561 [  --disable-win32-registry
1562                           disable lookup of installation paths in the
1563                           Registry on Windows hosts
1564   --enable-win32-registry enable registry lookup (default)
1565   --enable-win32-registry=KEY
1566                           use KEY instead of GCC version as the last portion
1567                           of the registry key],,)
1568
1569 case $host_os in
1570   win32 | pe | cygwin* | mingw32* | uwin*)
1571     if test "x$enable_win32_registry" != xno; then
1572       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1573     fi
1574
1575     if test "x$enable_win32_registry" != xno; then
1576       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1577   [Define to 1 if installation paths should be looked up in the Windows
1578    Registry. Ignored on non-Windows hosts.])
1579
1580       if test "x$enable_win32_registry" != xyes \
1581          && test "x$enable_win32_registry" != x; then
1582         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1583   [Define to be the last component of the Windows registry key under which
1584    to look for installation paths.  The full key used will be
1585    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1586    The default is the GCC version number.])
1587       fi
1588     fi
1589   ;;
1590 esac
1591
1592 # Get an absolute path to the GCC top-level source directory
1593 holddir=`${PWDCMD-pwd}`
1594 cd $srcdir
1595 topdir=`${PWDCMD-pwd}`
1596 cd $holddir
1597
1598 # Conditionalize the makefile for this host machine.
1599 xmake_file=
1600 for f in ${host_xmake_file}
1601 do
1602         if test -f ${srcdir}/config/$f
1603         then
1604                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1605         fi
1606 done
1607
1608 # Conditionalize the makefile for this target machine.
1609 tmake_file_=
1610 for f in ${tmake_file}
1611 do
1612         if test -f ${srcdir}/config/$f
1613         then
1614                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1615         fi
1616 done
1617 tmake_file="${tmake_file_}"
1618
1619 out_object_file=`basename $out_file .c`.o
1620
1621 tm_file_list="options.h"
1622 tm_include_list="options.h"
1623 for f in $tm_file; do
1624   case $f in
1625     ./* )
1626        f=`echo $f | sed 's/^..//'`
1627        tm_file_list="${tm_file_list} $f"
1628        tm_include_list="${tm_include_list} $f"
1629        ;;
1630     defaults.h )
1631        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1632        tm_include_list="${tm_include_list} $f"
1633        ;;
1634     * )
1635        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1636        tm_include_list="${tm_include_list} config/$f"
1637        ;;
1638   esac
1639 done
1640
1641 tm_p_file_list=
1642 tm_p_include_list=
1643 for f in $tm_p_file; do
1644   case $f in
1645     tm-preds.h )
1646        tm_p_file_list="${tm_p_file_list} $f"
1647        tm_p_include_list="${tm_p_include_list} $f"
1648        ;;
1649     * )
1650        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1651        tm_p_include_list="${tm_p_include_list} config/$f"
1652   esac
1653 done
1654
1655 xm_file_list=
1656 xm_include_list=
1657 for f in $xm_file; do
1658   case $f in
1659     ansidecl.h )
1660        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1661        xm_include_list="${xm_include_list} $f"
1662        ;;
1663     auto-host.h )
1664        xm_file_list="${xm_file_list} $f"
1665        xm_include_list="${xm_include_list} $f"
1666        ;;
1667     * )
1668        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1669        xm_include_list="${xm_include_list} config/$f"
1670        ;;
1671   esac
1672 done
1673
1674 host_xm_file_list=
1675 host_xm_include_list=
1676 for f in $host_xm_file; do
1677   case $f in
1678     ansidecl.h )
1679        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1680        host_xm_include_list="${host_xm_include_list} $f"
1681        ;;
1682     auto-host.h )
1683        host_xm_file_list="${host_xm_file_list} $f"
1684        host_xm_include_list="${host_xm_include_list} $f"
1685        ;;
1686     * )
1687        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1688        host_xm_include_list="${host_xm_include_list} config/$f"
1689        ;;
1690   esac
1691 done
1692
1693 build_xm_file_list=
1694 for f in $build_xm_file; do
1695   case $f in
1696     ansidecl.h )
1697        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1698        build_xm_include_list="${build_xm_include_list} $f"
1699        ;;
1700     auto-build.h | auto-host.h )
1701        build_xm_file_list="${build_xm_file_list} $f"
1702        build_xm_include_list="${build_xm_include_list} $f"
1703        ;;
1704     * )
1705        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
1706        build_xm_include_list="${build_xm_include_list} config/$f"
1707        ;;
1708   esac
1709 done
1710
1711 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
1712 # cross-compiler which does not use the native headers and libraries.
1713 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
1714 CROSS=                                          AC_SUBST(CROSS)
1715 ALL=all.internal                                AC_SUBST(ALL)
1716 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
1717
1718 if test "x$with_build_sysroot" != x; then
1719   build_system_header_dir=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
1720 else
1721   # This value is used, even on a native system, because
1722   # CROSS_SYSTEM_HEADER_DIR is just
1723   # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
1724   build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
1725 fi
1726
1727 if test x$host != x$target
1728 then
1729         CROSS="-DCROSS_DIRECTORY_STRUCTURE"
1730         ALL=all.cross
1731         SYSTEM_HEADER_DIR=$build_system_header_dir
1732         case "$host","$target" in
1733         # Darwin crosses can use the host system's libraries and headers,
1734         # because of the fat library support.  Of course, it must be the
1735         # same version of Darwin on both sides.  Allow the user to
1736         # just say --target=foo-darwin without a version number to mean
1737         # "the version on this system".
1738             *-*-darwin*,*-*-darwin*)
1739                 hostos=`echo $host | sed 's/.*-darwin/darwin/'`
1740                 targetos=`echo $target | sed 's/.*-darwin/darwin/'`
1741                 if test $hostos = $targetos -o $targetos = darwin ; then
1742                     CROSS=
1743                     SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
1744                     with_headers=yes
1745                 fi
1746                 ;;
1747
1748             i?86-*-*,x86_64-*-* \
1749             | powerpc*-*-*,powerpc64*-*-*)
1750                 CROSS="$CROSS -DNATIVE_CROSS" ;;
1751         esac
1752 elif test "x$TARGET_SYSTEM_ROOT" != x; then
1753         SYSTEM_HEADER_DIR=$build_system_header_dir
1754 fi
1755
1756 # If this is a cross-compiler that does not
1757 # have its own set of headers then define
1758 # inhibit_libc
1759
1760 # If this is using newlib, without having the headers available now,
1761 # then define inhibit_libc in LIBGCC2_CFLAGS.
1762 # This prevents libgcc2 from containing any code which requires libc
1763 # support.
1764 : ${inhibit_libc=false}
1765 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
1766        test x$with_newlib = xyes ; } &&
1767      { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
1768        inhibit_libc=true
1769 fi
1770 AC_SUBST(inhibit_libc)
1771
1772 # When building gcc with a cross-compiler, we need to adjust things so
1773 # that the generator programs are still built with the native compiler.
1774 # Also, we cannot run fixincludes.
1775
1776 # These are the normal (build=host) settings:
1777 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
1778 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
1779 BUILD_LDFLAGS='$(LDFLAGS)'      AC_SUBST(BUILD_LDFLAGS)
1780 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
1781
1782 # And these apply if build != host, or we are generating coverage data
1783 if test x$build != x$host || test "x$coverage_flags" != x
1784 then
1785     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
1786     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
1787 fi
1788
1789 # Expand extra_headers to include complete path.
1790 # This substitutes for lots of t-* files.
1791 extra_headers_list=
1792 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
1793 for file in ${extra_headers} ; do
1794   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
1795 done
1796
1797 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
1798 if test x"$use_gcc_tgmath" = xyes
1799 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
1800 fi
1801
1802 # Define collect2 in Makefile.
1803 case $host_can_use_collect2 in
1804   no) collect2= ;;
1805   *) collect2='collect2$(exeext)' ;;
1806 esac
1807 AC_SUBST([collect2])
1808
1809 # Add a definition of USE_COLLECT2 if system wants one.
1810 case $use_collect2 in
1811   no) use_collect2= ;;
1812   "") ;;
1813   *)
1814     host_xm_defines="${host_xm_defines} USE_COLLECT2"
1815     xm_defines="${xm_defines} USE_COLLECT2"
1816     case $host_can_use_collect2 in
1817       no)
1818         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
1819         ;;
1820     esac
1821     ;;
1822 esac
1823
1824 # ---------------------------
1825 # Assembler & linker features
1826 # ---------------------------
1827
1828 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
1829 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
1830 # However when ld-new is first executed from the build tree, libtool will
1831 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
1832 # to the build tree.  While doing this we need to use the previous-stage
1833 # linker, or we have an infinite loop.  The presence of a shell script as
1834 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
1835 # the gcc/collect-ld script.  So we need to know how libtool works, or
1836 # exec-tool will fail.
1837
1838 m4_defun([_LT_CONFIG_COMMANDS], [])
1839 AC_PROG_LIBTOOL
1840 AC_SUBST(objdir)
1841 AC_SUBST(enable_fast_install)
1842
1843 # Identify the assembler which will work hand-in-glove with the newly
1844 # built GCC, so that we can examine its features.  This is the assembler
1845 # which will be driven by the driver program.
1846 #
1847 # If build != host, and we aren't building gas in-tree, we identify a
1848 # build->target assembler and hope that it will have the same features
1849 # as the host->target assembler we'll be using.
1850 gcc_cv_gas_major_version=
1851 gcc_cv_gas_minor_version=
1852 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
1853
1854 m4_pattern_allow([AS_FOR_TARGET])dnl
1855 AS_VAR_SET_IF(gcc_cv_as,, [
1856 if test -x "$DEFAULT_ASSEMBLER"; then
1857         gcc_cv_as="$DEFAULT_ASSEMBLER"
1858 elif test -f $gcc_cv_as_gas_srcdir/configure.in \
1859      && test -f ../gas/Makefile \
1860      && test x$build = x$host; then
1861         gcc_cv_as=../gas/as-new$build_exeext
1862 elif test -x as$build_exeext; then
1863         # Build using assembler in the current directory.
1864         gcc_cv_as=./as$build_exeext
1865 elif test -x $AS_FOR_TARGET; then
1866         gcc_cv_as="$AS_FOR_TARGET"
1867 else
1868         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
1869 fi])
1870
1871 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
1872 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
1873 case "$ORIGINAL_AS_FOR_TARGET" in
1874   ./as | ./as$build_exeext) ;;
1875   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
1876 esac
1877
1878 AC_MSG_CHECKING(what assembler to use)
1879 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
1880   # Single tree build which includes gas.  We want to prefer it
1881   # over whatever linker top-level may have detected, since
1882   # we'll use what we're building after installation anyway.
1883   AC_MSG_RESULT(newly built gas)
1884   in_tree_gas=yes
1885   _gcc_COMPUTE_GAS_VERSION
1886   in_tree_gas_is_elf=no
1887   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
1888      || (grep 'obj_format = multi' ../gas/Makefile \
1889          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
1890   then
1891     in_tree_gas_is_elf=yes
1892   fi
1893 else
1894   AC_MSG_RESULT($gcc_cv_as)
1895   in_tree_gas=no
1896 fi
1897
1898 # Identify the linker which will work hand-in-glove with the newly
1899 # built GCC, so that we can examine its features.  This is the linker
1900 # which will be driven by the driver program.
1901 #
1902 # If build != host, and we aren't building gas in-tree, we identify a
1903 # build->target linker and hope that it will have the same features
1904 # as the host->target linker we'll be using.
1905 gcc_cv_gld_major_version=
1906 gcc_cv_gld_minor_version=
1907 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
1908 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
1909
1910 AS_VAR_SET_IF(gcc_cv_ld,, [
1911 if test -x "$DEFAULT_LINKER"; then
1912         gcc_cv_ld="$DEFAULT_LINKER"
1913 elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
1914      && test -f ../ld/Makefile \
1915      && test x$build = x$host; then
1916         gcc_cv_ld=../ld/ld-new$build_exeext
1917 elif test -x collect-ld$build_exeext; then
1918         # Build using linker in the current directory.
1919         gcc_cv_ld=./collect-ld$build_exeext
1920 elif test -x $LD_FOR_TARGET; then
1921         gcc_cv_ld="$LD_FOR_TARGET"
1922 else
1923         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
1924 fi])
1925
1926 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
1927 PLUGIN_LD=`basename $gcc_cv_ld`
1928 AC_ARG_WITH(plugin-ld,
1929 [  --with-plugin-ld=[[ARG]]  specify the plugin linker],
1930 [if test x"$withval" != x; then
1931    ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
1932    PLUGIN_LD="$withval"
1933  fi])
1934 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
1935 AC_DEFINE_UNQUOTED(PLUGIN_LD, "$PLUGIN_LD", [Specify plugin linker])
1936
1937 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
1938 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
1939 case "$ORIGINAL_LD_FOR_TARGET" in
1940   ./collect-ld | ./collect-ld$build_exeext) ;;
1941   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
1942 esac
1943
1944 AC_MSG_CHECKING(what linker to use)
1945 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext; then
1946         # Single tree build which includes ld.  We want to prefer it
1947         # over whatever linker top-level may have detected, since
1948         # we'll use what we're building after installation anyway.
1949         AC_MSG_RESULT(newly built ld)
1950         in_tree_ld=yes
1951         in_tree_ld_is_elf=no
1952         if (grep 'EMUL = .*elf' ../ld/Makefile \
1953             || grep 'EMUL = .*linux' ../ld/Makefile \
1954             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
1955           in_tree_ld_is_elf=yes
1956         fi
1957         for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.in $gcc_cv_ld_gld_srcdir/Makefile.in
1958         do
1959 changequote(,)dnl
1960                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*\(VERSION=[0-9]*\.[0-9]*.*\)/\1/p' < $f`
1961                 if test x$gcc_cv_gld_version != x; then
1962                         break
1963                 fi
1964         done
1965         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
1966         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
1967 changequote([,])dnl
1968 else
1969         AC_MSG_RESULT($gcc_cv_ld)
1970         in_tree_ld=no
1971 fi
1972
1973 # Figure out what nm we will be using.
1974 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
1975 AS_VAR_SET_IF(gcc_cv_nm,, [
1976 if test -f $gcc_cv_binutils_srcdir/configure.in \
1977      && test -f ../binutils/Makefile \
1978      && test x$build = x$host; then
1979         gcc_cv_nm=../binutils/nm-new$build_exeext
1980 elif test -x nm$build_exeext; then
1981         gcc_cv_nm=./nm$build_exeext
1982 elif test -x $NM_FOR_TARGET; then
1983         gcc_cv_nm="$NM_FOR_TARGET"
1984 else
1985         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
1986 fi])
1987
1988 AC_MSG_CHECKING(what nm to use)
1989 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
1990         # Single tree build which includes binutils.
1991         AC_MSG_RESULT(newly built nm)
1992         in_tree_nm=yes
1993 else
1994         AC_MSG_RESULT($gcc_cv_nm)
1995         in_tree_nm=no
1996 fi
1997
1998 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
1999 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2000 case "$ORIGINAL_NM_FOR_TARGET" in
2001   ./nm | ./nm$build_exeext) ;;
2002   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2003 esac
2004
2005
2006 # Figure out what objdump we will be using.
2007 AS_VAR_SET_IF(gcc_cv_objdump,, [
2008 if test -f $gcc_cv_binutils_srcdir/configure.in \
2009      && test -f ../binutils/Makefile \
2010      && test x$build = x$host; then
2011         # Single tree build which includes binutils.
2012         gcc_cv_objdump=../binutils/objdump$build_exeext
2013 elif test -x objdump$build_exeext; then
2014         gcc_cv_objdump=./objdump$build_exeext
2015 elif test -x $OBJDUMP_FOR_TARGET; then
2016         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2017 else
2018         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2019 fi])
2020
2021 AC_MSG_CHECKING(what objdump to use)
2022 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2023         # Single tree build which includes binutils.
2024         AC_MSG_RESULT(newly built objdump)
2025 elif test x$gcc_cv_objdump = x; then
2026         AC_MSG_RESULT(not found)
2027 else
2028         AC_MSG_RESULT($gcc_cv_objdump)
2029 fi
2030
2031 # Figure out what readelf we will be using.
2032 AS_VAR_SET_IF(gcc_cv_readelf,, [
2033 if test -f $gcc_cv_binutils_srcdir/configure.in \
2034      && test -f ../binutils/Makefile \
2035      && test x$build = x$host; then
2036         # Single tree build which includes binutils.
2037         gcc_cv_readelf=../binutils/readelf$build_exeext
2038 elif test -x readelf$build_exeext; then
2039         gcc_cv_readelf=./readelf$build_exeext
2040 else
2041         AC_PATH_PROG(gcc_cv_readelf, readelf)
2042 fi])
2043
2044 AC_MSG_CHECKING(what readelf to use)
2045 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2046         # Single tree build which includes binutils.
2047         AC_MSG_RESULT(newly built readelf)
2048 elif test x$gcc_cv_readelf = x; then
2049         AC_MSG_RESULT(not found)
2050 else
2051         AC_MSG_RESULT($gcc_cv_readelf)
2052 fi
2053
2054 # Figure out what assembler alignment features are present.
2055 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2056  [2,6,0],,
2057 [.balign 4
2058 .p2align 2],,
2059 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2060   [Define if your assembler supports .balign and .p2align.])])
2061
2062 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2063  [2,8,0],,
2064  [.p2align 4,,7],,
2065 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2066   [Define if your assembler supports specifying the maximum number
2067    of bytes to skip when using the GAS .p2align command.])])
2068
2069 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2070  [2,8,0],,
2071  [.literal16],,
2072 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2073   [Define if your assembler supports .literal16.])])
2074
2075 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2076  [elf,2,9,0],,
2077  [conftest_label1: .word 0
2078 .subsection -1
2079 conftest_label2: .word 0
2080 .previous],
2081  [if test x$gcc_cv_nm != x; then
2082     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2083     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2084     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2085     then :
2086     else gcc_cv_as_subsection_m1=yes
2087     fi
2088     rm -f conftest.nm1 conftest.nm2
2089   fi],
2090  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2091   [Define if your assembler supports .subsection and .subsection -1 starts
2092    emitting at the beginning of your section.])])
2093
2094 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2095  [2,2,0],,
2096  [      .weak foobar],,
2097 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2098
2099 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2100  [2,17,0],,
2101  [      .weakref foobar, barfnot],,
2102 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2103
2104 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2105  [2,15,91],,
2106  [      .SPACE $TEXT$
2107         .NSUBSPA $CODE$,COMDAT],,
2108 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2109
2110 # .hidden needs to be supported in both the assembler and the linker,
2111 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2112 # This is irritatingly difficult to feature test for; we have to check the
2113 # date string after the version number.  If we've got an in-tree
2114 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2115 # to be safe.
2116 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2117 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2118  [elf,2,13,0],,
2119 [       .hidden foobar
2120 foobar:])
2121
2122 changequote(,)dnl
2123 if test $in_tree_ld != yes ; then
2124   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2125   if echo "$ld_ver" | grep GNU > /dev/null; then
2126     ld_vers=`echo $ld_ver | sed -n \
2127         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2128     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2129     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2130     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2131     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2132   fi
2133 fi
2134 changequote([,])dnl
2135
2136 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2137 [[if test $in_tree_ld = yes ; then
2138   gcc_cv_ld_hidden=no
2139   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2140      && test $in_tree_ld_is_elf = yes; then
2141      gcc_cv_ld_hidden=yes
2142   fi
2143 else
2144   gcc_cv_ld_hidden=yes
2145   if echo "$ld_ver" | grep GNU > /dev/null; then
2146     if test 0"$ld_date" -lt 20020404; then
2147       if test -n "$ld_date"; then
2148         # If there was date string, but was earlier than 2002-04-04, fail
2149         gcc_cv_ld_hidden=no
2150       elif test -z "$ld_vers"; then
2151         # If there was no date string nor ld version number, something is wrong
2152         gcc_cv_ld_hidden=no
2153       else
2154         test -z "$ld_vers_patch" && ld_vers_patch=0
2155         if test "$ld_vers_major" -lt 2; then
2156           gcc_cv_ld_hidden=no
2157         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2158           gcc_cv_ld_hidden="no"
2159         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2160           gcc_cv_ld_hidden=no
2161         fi
2162       fi
2163     fi
2164   else
2165     case "${target}" in
2166       hppa64*-*-hpux* | ia64*-*-hpux*)
2167         gcc_cv_ld_hidden=yes
2168         ;;
2169       *-*-solaris2.9* | *-*-solaris2.1[0-9]*)
2170         gcc_cv_ld_hidden=yes
2171         ;;
2172       *)
2173         gcc_cv_ld_hidden=no
2174         ;;
2175     esac
2176   fi
2177 fi]])
2178 libgcc_visibility=no
2179 AC_SUBST(libgcc_visibility)
2180 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2181 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2182   libgcc_visibility=yes
2183   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2184   [Define if your assembler and linker support .hidden.])
2185 fi
2186
2187 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2188 gcc_cv_ld_ro_rw_mix=unknown
2189 if test $in_tree_ld = yes ; then
2190   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2191      && test $in_tree_ld_is_elf = yes; then
2192     gcc_cv_ld_ro_rw_mix=read-write
2193   fi
2194 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2195   echo '.section myfoosect, "a"' > conftest1.s
2196   echo '.section myfoosect, "aw"' > conftest2.s
2197   echo '.byte 1' >> conftest2.s
2198   echo '.section myfoosect, "a"' > conftest3.s
2199   echo '.byte 0' >> conftest3.s
2200   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2201      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2202      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2203      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2204         conftest2.o conftest3.o > /dev/null 2>&1; then
2205     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2206                          | sed -e '/myfoosect/!d' -e N`
2207     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2208       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2209         gcc_cv_ld_ro_rw_mix=read-only
2210       else
2211         gcc_cv_ld_ro_rw_mix=read-write
2212       fi
2213     fi
2214   fi
2215 changequote(,)dnl
2216   rm -f conftest.* conftest[123].*
2217 changequote([,])dnl
2218 fi
2219 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2220         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2221   [Define if your linker links a mix of read-only
2222    and read-write sections into a read-write section.])
2223 fi
2224 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2225
2226 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2227 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2228   [elf,2,11,0],,
2229 [       .data
2230         .uleb128 L2 - L1
2231 L1:
2232         .uleb128 1280
2233         .sleb128 -1010
2234 L2:],
2235 [[# GAS versions before 2.11 do not support uleb128,
2236   # despite appearing to.
2237   # ??? There exists an elf-specific test that will crash
2238   # the assembler.  Perhaps it's better to figure out whether
2239   # arbitrary sections are supported and try the test.
2240   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2241   if echo "$as_ver" | grep GNU > /dev/null; then
2242     as_vers=`echo $as_ver | sed -n \
2243         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2244     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2245     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2246     if test $as_major -eq 2 && test $as_minor -lt 11
2247     then :
2248     else gcc_cv_as_leb128=yes
2249     fi
2250   fi]],
2251   [AC_DEFINE(HAVE_AS_LEB128, 1,
2252     [Define if your assembler supports .sleb128 and .uleb128.])])
2253
2254 # Check if we have assembler support for unwind directives.
2255 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2256   ,,
2257 [       .text
2258         .cfi_startproc
2259         .cfi_offset 0, 0
2260         .cfi_same_value 1
2261         .cfi_def_cfa 1, 2
2262         .cfi_escape 1, 2, 3, 4, 5
2263         .cfi_endproc],
2264 [case "$target" in
2265   *-*-solaris*)
2266     # If the linker used on Solaris (like Sun ld) isn't capable of merging
2267     # read-only and read-write sections, we need to make sure that the
2268     # assembler used emits read-write .eh_frame sections.
2269     if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2270       if test "x$gcc_cv_objdump" != x; then
2271         if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2272                 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2273           gcc_cv_as_cfi_directive=no
2274         else
2275           case "$target" in
2276             i?86-*-solaris2.1[[0-9]]*)
2277               # On Solaris/x86, make sure that GCC and gas agree on using
2278               # read-only .eh_frame sections for 64-bit.
2279               if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \
2280                 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2281                         sed -e /.eh_frame/!d -e N | \
2282                         grep READONLY > /dev/null; then
2283                 gcc_cv_as_cfi_directive=yes
2284               else
2285                 gcc_cv_as_cfi_directive=no
2286               fi
2287               ;;
2288             *)
2289               gcc_cv_as_cfi_directive=yes
2290               ;;
2291           esac
2292         fi
2293       else
2294         # no objdump, err on the side of caution
2295         gcc_cv_as_cfi_directive=no
2296       fi
2297     else
2298       gcc_cv_as_cfi_directive=yes
2299     fi
2300     ;;
2301   *-*-*)
2302     gcc_cv_as_cfi_directive=yes
2303     ;;
2304 esac])
2305 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_readelf != x; then
2306 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2307   ,,
2308 [       .text
2309         .cfi_startproc
2310         .cfi_adjust_cfa_offset 64
2311         .skip 75040, 0
2312         .cfi_adjust_cfa_offset 128
2313         .cfi_endproc],
2314 [[
2315 if $gcc_cv_readelf -wf conftest.o 2>/dev/null \
2316     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
2317    gcc_cv_as_cfi_advance_working=yes
2318 fi
2319 ]])
2320 else
2321   # no readelf, err on the side of caution
2322   gcc_cv_as_cfi_advance_working=no
2323 fi
2324 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2325   [`if test $gcc_cv_as_cfi_directive = yes \
2326        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2327   [Define 0/1 if your assembler supports CFI directives.])
2328
2329 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2330   gcc_cv_as_cfi_personality_directive, ,,
2331 [       .text
2332         .cfi_startproc
2333         .cfi_personality 0, symbol
2334         .cfi_endproc])
2335 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2336   [`if test $gcc_cv_as_cfi_personality_directive = yes;
2337     then echo 1; else echo 0; fi`],
2338   [Define 0/1 if your assembler supports .cfi_personality.])
2339
2340 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2341   gcc_cv_as_cfi_sections_directive, ,,
2342 [       .text
2343         .cfi_sections .debug_frame, .eh_frame
2344         .cfi_startproc
2345         .cfi_endproc])
2346 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2347   [`if test $gcc_cv_as_cfi_sections_directive = yes;
2348     then echo 1; else echo 0; fi`],
2349   [Define 0/1 if your assembler supports .cfi_sections.])
2350
2351 # GAS versions up to and including 2.11.0 may mis-optimize
2352 # .eh_frame data.
2353 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2354   [elf,2,12,0],,
2355 [       .text
2356 .LFB1:
2357         .4byte  0
2358 .L1:
2359         .4byte  0
2360 .LFE1:
2361         .section        .eh_frame,"aw",@progbits
2362 __FRAME_BEGIN__:
2363         .4byte  .LECIE1-.LSCIE1
2364 .LSCIE1:
2365         .4byte  0x0
2366         .byte   0x1
2367         .ascii "z\0"
2368         .byte   0x1
2369         .byte   0x78
2370         .byte   0x1a
2371         .byte   0x0
2372         .byte   0x4
2373         .4byte  1
2374         .p2align 1
2375 .LECIE1:
2376 .LSFDE1:
2377         .4byte  .LEFDE1-.LASFDE1
2378 .LASFDE1:
2379         .4byte  .LASFDE1-__FRAME_BEGIN__
2380         .4byte  .LFB1
2381         .4byte  .LFE1-.LFB1
2382         .byte   0x4
2383         .4byte  .LFE1-.LFB1
2384         .byte   0x4
2385         .4byte  .L1-.LFB1
2386 .LEFDE1:],
2387 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2388 cat > conftest.lit <<EOF
2389  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2390  0010 01000000 12000000 18000000 00000000  ................
2391  0020 08000000 04080000 0044               .........D      @&t@
2392 EOF
2393 cat > conftest.big <<EOF
2394  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2395  0010 00000001 00000012 00000018 00000000  ................
2396  0020 00000008 04000000 0844               .........D      @&t@
2397 EOF
2398   # If the assembler didn't choke, and we can objdump,
2399   # and we got the correct data, then succeed.
2400   # The text in the here-document typically retains its unix-style line
2401   # endings, while the output of objdump will use host line endings.
2402   # Therefore, use diff -b for the comparisons.
2403   if test x$gcc_cv_objdump != x \
2404   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2405      | tail -3 > conftest.got \
2406   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2407     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2408   then
2409     gcc_cv_as_eh_frame=yes
2410   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2411     gcc_cv_as_eh_frame=buggy
2412   else
2413     # Uh oh, what do we do now?
2414     gcc_cv_as_eh_frame=no
2415   fi])
2416
2417 if test $gcc_cv_as_eh_frame = buggy; then
2418   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2419   [Define if your assembler mis-optimizes .eh_frame data.])
2420 fi
2421
2422 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2423  [elf,2,12,0], [--fatal-warnings],
2424  [.section .rodata.str, "aMS", @progbits, 1])
2425 if test $gcc_cv_as_shf_merge = no; then
2426   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2427     [elf,2,12,0], [--fatal-warnings],
2428     [.section .rodata.str, "aMS", %progbits, 1])
2429 fi
2430 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2431   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2432 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2433
2434 gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group,
2435  [elf,2,16,0], [--fatal-warnings],
2436  [.section .text,"axG",@progbits,.foo,comdat])
2437 if test $gcc_cv_as_comdat_group = yes; then
2438   gcc_cv_as_comdat_group_percent=no
2439 else
2440  gcc_GAS_CHECK_FEATURE(COMDAT group support, gcc_cv_as_comdat_group_percent,
2441    [elf,2,16,0], [--fatal-warnings],
2442    [.section .text,"axG",%progbits,.foo,comdat])
2443 fi
2444 if test $in_tree_ld = yes ; then
2445   comdat_group=no
2446   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
2447      && test $in_tree_ld_is_elf = yes; then
2448      comdat_group=yes
2449   fi
2450 elif test x"$ld_vers" != x; then
2451   comdat_group=yes
2452   if test 0"$ld_date" -lt 20050308; then
2453     if test -n "$ld_date"; then
2454       # If there was date string, but was earlier than 2005-03-08, fail
2455       comdat_group=no
2456     elif test "$ld_vers_major" -lt 2; then
2457       comdat_group=no
2458     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
2459       comdat_group=no
2460     fi
2461   fi
2462 else
2463   # assume linkers other than GNU ld don't support COMDAT group
2464   comdat_group=no
2465 fi
2466 if test $comdat_group = no; then
2467   gcc_cv_as_comdat_group=no
2468   gcc_cv_as_comdat_group_percent=no
2469 fi
2470 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
2471   [`if test $gcc_cv_as_comdat_group = yes || test $gcc_cv_as_comdat_group_percent = yes; then echo 1; else echo 0; fi`],
2472 [Define 0/1 if your assembler and linker support COMDAT groups.])
2473
2474 gcc_GAS_CHECK_FEATURE([line table discriminator support],
2475  gcc_cv_as_discriminator,
2476  [2,19,51],,
2477 [       .text
2478         .file 1 "conf.c"
2479         .loc 1 1 0 discriminator 1],,
2480 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
2481   [Define if your assembler supports the .loc discriminator sub-directive.])])
2482
2483 # Thread-local storage - the check is heavily parameterized.
2484 conftest_s=
2485 tls_first_major=
2486 tls_first_minor=
2487 tls_as_opt=
2488 case "$target" in
2489 changequote(,)dnl
2490   alpha*-*-*)
2491     conftest_s='
2492         .section ".tdata","awT",@progbits
2493 foo:    .long   25
2494         .text
2495         ldq     $27,__tls_get_addr($29)         !literal!1
2496         lda     $16,foo($29)                    !tlsgd!1
2497         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
2498         ldq     $27,__tls_get_addr($29)         !literal!2
2499         lda     $16,foo($29)                    !tlsldm!2
2500         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
2501         ldq     $1,foo($29)                     !gotdtprel
2502         ldah    $2,foo($29)                     !dtprelhi
2503         lda     $3,foo($2)                      !dtprello
2504         lda     $4,foo($29)                     !dtprel
2505         ldq     $1,foo($29)                     !gottprel
2506         ldah    $2,foo($29)                     !tprelhi
2507         lda     $3,foo($2)                      !tprello
2508         lda     $4,foo($29)                     !tprel'
2509         tls_first_major=2
2510         tls_first_minor=13
2511         tls_as_opt=--fatal-warnings
2512         ;;
2513   cris-*-*|crisv32-*-*)
2514     conftest_s='
2515         .section ".tdata","awT",@progbits
2516 x:      .long   25
2517         .text
2518         move.d x:IE,$r10
2519         nop'
2520         tls_first_major=2
2521         tls_first_minor=20
2522         tls_as_opt=--fatal-warnings
2523         ;;
2524   frv*-*-*)
2525     conftest_s='
2526         .section ".tdata","awT",@progbits
2527 x:      .long   25
2528         .text
2529         call    #gettlsoff(x)'
2530         tls_first_major=2
2531         tls_first_minor=14
2532         ;;
2533   hppa*-*-linux*)
2534     conftest_s='
2535 t1:     .reg    %r20
2536 t2:     .reg    %r21
2537 gp:     .reg    %r19
2538         .section ".tdata","awT",@progbits
2539 foo:    .long   25
2540         .text
2541         .align  4
2542         addil LT%foo-$tls_gdidx$,gp
2543         ldo RT%foo-$tls_gdidx$(%r1),%arg0
2544         b __tls_get_addr
2545         nop
2546         addil LT%foo-$tls_ldidx$,gp
2547         b __tls_get_addr
2548         ldo RT%foo-$tls_ldidx$(%r1),%arg0
2549         addil LR%foo-$tls_dtpoff$,%ret0
2550         ldo RR%foo-$tls_dtpoff$(%r1),%t1
2551         mfctl %cr27,%t1
2552         addil LT%foo-$tls_ieoff$,gp
2553         ldw RT%foo-$tls_ieoff$(%r1),%t2
2554         add %t1,%t2,%t3
2555         mfctl %cr27,%t1
2556         addil LR%foo-$tls_leoff$,%t1
2557         ldo RR%foo-$tls_leoff$(%r1),%t2'
2558         tls_first_major=2
2559         tls_first_minor=15
2560         tls_as_opt=--fatal-warnings
2561         ;;
2562   arm*-*-*)
2563     conftest_s='
2564         .section ".tdata","awT",%progbits
2565 foo:    .long   25
2566         .text
2567 .word foo(gottpoff)
2568 .word foo(tpoff)
2569 .word foo(tlsgd)
2570 .word foo(tlsldm)
2571 .word foo(tlsldo)'
2572         tls_first_major=2
2573         tls_first_minor=17
2574         ;;
2575   i[34567]86-*-*)
2576     case "$target" in
2577       i[34567]86-*-solaris2.[56789]*)
2578         # TLS was introduced in the Solaris 9 4/04 release but
2579         # we do not enable it by default on Solaris 9 either.
2580         if test "x$enable_tls" = xyes ; then
2581           on_solaris=yes
2582         else
2583           enable_tls=no;
2584         fi
2585         ;;
2586       i[34567]86-*-solaris2.*)
2587         on_solaris=yes
2588         ;;
2589       *)
2590         on_solaris=no
2591         ;;
2592     esac
2593     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2594       conftest_s='
2595         .section .tdata,"awt",@progbits'
2596       tls_first_major=0
2597       tls_first_minor=0
2598 changequote([,])dnl
2599       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
2600 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
2601 changequote(,)dnl
2602     else
2603       conftest_s='
2604         .section ".tdata","awT",@progbits'
2605       tls_first_major=2
2606       tls_first_minor=14
2607       tls_as_opt="--fatal-warnings"
2608     fi
2609     conftest_s="$conftest_s
2610 foo:    .long   25
2611         .text
2612         movl    %gs:0, %eax
2613         leal    foo@tlsgd(,%ebx,1), %eax
2614         leal    foo@tlsldm(%ebx), %eax
2615         leal    foo@dtpoff(%eax), %edx
2616         movl    foo@gottpoff(%ebx), %eax
2617         subl    foo@gottpoff(%ebx), %eax
2618         addl    foo@gotntpoff(%ebx), %eax
2619         movl    foo@indntpoff, %eax
2620         movl    \$foo@tpoff, %eax
2621         subl    \$foo@tpoff, %eax
2622         leal    foo@ntpoff(%ecx), %eax"
2623     ;;
2624   x86_64-*-*)
2625     conftest_s='
2626         .section ".tdata","awT",@progbits
2627 foo:    .long   25
2628         .text
2629         movq    %fs:0, %rax
2630         leaq    foo@TLSGD(%rip), %rdi
2631         leaq    foo@TLSLD(%rip), %rdi
2632         leaq    foo@DTPOFF(%rax), %rdx
2633         movq    foo@GOTTPOFF(%rip), %rax
2634         movq    $foo@TPOFF, %rax'
2635         tls_first_major=2
2636         tls_first_minor=14
2637         tls_as_opt=--fatal-warnings
2638         ;;
2639   ia64-*-*)
2640     conftest_s='
2641         .section ".tdata","awT",@progbits
2642 foo:    data8   25
2643         .text
2644         addl    r16 = @ltoff(@dtpmod(foo#)), gp
2645         addl    r17 = @ltoff(@dtprel(foo#)), gp
2646         addl    r18 = @ltoff(@tprel(foo#)), gp
2647         addl    r19 = @dtprel(foo#), gp
2648         adds    r21 = @dtprel(foo#), r13
2649         movl    r23 = @dtprel(foo#)
2650         addl    r20 = @tprel(foo#), gp
2651         adds    r22 = @tprel(foo#), r13
2652         movl    r24 = @tprel(foo#)'
2653         tls_first_major=2
2654         tls_first_minor=13
2655         tls_as_opt=--fatal-warnings
2656         ;;
2657   mips*-*-*)
2658     conftest_s='
2659         .section .tdata,"awT",@progbits
2660 x:
2661         .word 2
2662         .text
2663         addiu $4, $28, %tlsgd(x)
2664         addiu $4, $28, %tlsldm(x)
2665         lui $4, %dtprel_hi(x)
2666         addiu $4, $4, %dtprel_lo(x)
2667         lw $4, %gottprel(x)($28)
2668         lui $4, %tprel_hi(x)
2669         addiu $4, $4, %tprel_lo(x)'
2670         tls_first_major=2
2671         tls_first_minor=16
2672         tls_as_opt='-32 --fatal-warnings'
2673         ;;
2674   m68k-*-*)
2675     conftest_s='
2676         .section .tdata,"awT",@progbits
2677 x:
2678         .word 2
2679         .text
2680 foo:
2681         move.l x@TLSGD(%a5),%a0
2682         move.l x@TLSLDM(%a5),%a0
2683         move.l x@TLSLDO(%a5),%a0
2684         move.l x@TLSIE(%a5),%a0
2685         move.l x@TLSLE(%a5),%a0'
2686         tls_first_major=2
2687         tls_first_minor=19
2688         tls_as_opt='--fatal-warnings'
2689         ;;
2690   powerpc-*-*)
2691     conftest_s='
2692         .section ".tdata","awT",@progbits
2693         .align 2
2694 ld0:    .space 4
2695 ld1:    .space 4
2696 x1:     .space 4
2697 x2:     .space 4
2698 x3:     .space 4
2699         .text
2700         addi 3,31,ld0@got@tlsgd
2701         bl __tls_get_addr
2702         addi 3,31,x1@got@tlsld
2703         bl __tls_get_addr
2704         addi 9,3,x1@dtprel
2705         addis 9,3,x2@dtprel@ha
2706         addi 9,9,x2@dtprel@l
2707         lwz 9,x3@got@tprel(31)
2708         add 9,9,x@tls
2709         addi 9,2,x1@tprel
2710         addis 9,2,x2@tprel@ha
2711         addi 9,9,x2@tprel@l'
2712         tls_first_major=2
2713         tls_first_minor=14
2714         tls_as_opt="-a32 --fatal-warnings"
2715         ;;
2716   powerpc64-*-*)
2717     conftest_s='
2718         .section ".tdata","awT",@progbits
2719         .align 3
2720 ld0:    .space 8
2721 ld1:    .space 8
2722 x1:     .space 8
2723 x2:     .space 8
2724 x3:     .space 8
2725         .text
2726         addi 3,2,ld0@got@tlsgd
2727         bl .__tls_get_addr
2728         nop
2729         addi 3,2,ld1@toc
2730         bl .__tls_get_addr
2731         nop
2732         addi 3,2,x1@got@tlsld
2733         bl .__tls_get_addr
2734         nop
2735         addi 9,3,x1@dtprel
2736         bl .__tls_get_addr
2737         nop
2738         addis 9,3,x2@dtprel@ha
2739         addi 9,9,x2@dtprel@l
2740         bl .__tls_get_addr
2741         nop
2742         ld 9,x3@got@dtprel(2)
2743         add 9,9,3
2744         bl .__tls_get_addr
2745         nop'
2746         tls_first_major=2
2747         tls_first_minor=14
2748         tls_as_opt="-a64 --fatal-warnings"
2749         ;;
2750   s390-*-*)
2751     conftest_s='
2752         .section ".tdata","awT",@progbits
2753 foo:    .long   25
2754         .text
2755         .long   foo@TLSGD
2756         .long   foo@TLSLDM
2757         .long   foo@DTPOFF
2758         .long   foo@NTPOFF
2759         .long   foo@GOTNTPOFF
2760         .long   foo@INDNTPOFF
2761         l       %r1,foo@GOTNTPOFF(%r12)
2762         l       %r1,0(%r1):tls_load:foo
2763         bas     %r14,0(%r1,%r13):tls_gdcall:foo
2764         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
2765         tls_first_major=2
2766         tls_first_minor=14
2767         tls_as_opt="-m31 --fatal-warnings"
2768         ;;
2769   s390x-*-*)
2770     conftest_s='
2771         .section ".tdata","awT",@progbits
2772 foo:    .long   25
2773         .text
2774         .quad   foo@TLSGD
2775         .quad   foo@TLSLDM
2776         .quad   foo@DTPOFF
2777         .quad   foo@NTPOFF
2778         .quad   foo@GOTNTPOFF
2779         lg      %r1,foo@GOTNTPOFF(%r12)
2780         larl    %r1,foo@INDNTPOFF
2781         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
2782         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
2783         tls_first_major=2
2784         tls_first_minor=14
2785         tls_as_opt="-m64 -Aesame --fatal-warnings"
2786         ;;
2787   sh-*-* | sh[34]-*-*)
2788     conftest_s='
2789         .section ".tdata","awT",@progbits
2790 foo:    .long   25
2791         .text
2792         .long   foo@TLSGD
2793         .long   foo@TLSLDM
2794         .long   foo@DTPOFF
2795         .long   foo@GOTTPOFF
2796         .long   foo@TPOFF'
2797         tls_first_major=2
2798         tls_first_minor=13
2799         tls_as_opt=--fatal-warnings
2800         ;;
2801   sparc*-*-*)
2802     case "$target" in
2803       sparc*-sun-solaris2.[56789]*)
2804         # TLS was introduced in the Solaris 9 4/04 release but
2805         # we do not enable it by default on Solaris 9 either.
2806         if test "x$enable_tls" = xyes ; then
2807           on_solaris=yes
2808         else
2809           enable_tls=no;
2810         fi
2811         ;;
2812       sparc*-sun-solaris2.*)
2813         on_solaris=yes
2814         ;;
2815       *)
2816         on_solaris=no
2817         ;;
2818     esac
2819     if test x$on_solaris = xyes && test x$gas_flag = xno; then
2820       conftest_s='
2821         .section ".tdata",#alloc,#write,#tls
2822 foo:    .long   25
2823         .text
2824         sethi   %tgd_hi22(foo), %o0
2825         add     %o0, %tgd_lo10(foo), %o1
2826         add     %l7, %o1, %o0, %tgd_add(foo)
2827         call    __tls_get_addr, %tgd_call(foo)
2828         sethi   %tldm_hi22(foo), %l1
2829         add     %l1, %tldm_lo10(foo), %l2
2830         add     %l7, %l2, %o0, %tldm_add(foo)
2831         call    __tls_get_addr, %tldm_call(foo)
2832         sethi   %tldo_hix22(foo), %l3
2833         xor     %l3, %tldo_lox10(foo), %l4
2834         add     %o0, %l4, %l5, %tldo_add(foo)
2835         sethi   %tie_hi22(foo), %o3
2836         add     %o3, %tie_lo10(foo), %o3
2837         ld      [%l7 + %o3], %o2, %tie_ld(foo)
2838         add     %g7, %o2, %o4, %tie_add(foo)
2839         sethi   %tle_hix22(foo), %l1
2840         xor     %l1, %tle_lox10(foo), %o5
2841         ld      [%g7 + %o5], %o1'
2842         tls_first_major=0
2843         tls_first_minor=0
2844     else
2845       conftest_s='
2846         .section ".tdata","awT",@progbits
2847 foo:    .long   25
2848         .text
2849         sethi   %tgd_hi22(foo), %o0
2850         add     %o0, %tgd_lo10(foo), %o1
2851         add     %l7, %o1, %o0, %tgd_add(foo)
2852         call    __tls_get_addr, %tgd_call(foo)
2853         sethi   %tldm_hi22(foo), %l1
2854         add     %l1, %tldm_lo10(foo), %l2
2855         add     %l7, %l2, %o0, %tldm_add(foo)
2856         call    __tls_get_addr, %tldm_call(foo)
2857         sethi   %tldo_hix22(foo), %l3
2858         xor     %l3, %tldo_lox10(foo), %l4
2859         add     %o0, %l4, %l5, %tldo_add(foo)
2860         sethi   %tie_hi22(foo), %o3
2861         add     %o3, %tie_lo10(foo), %o3
2862         ld      [%l7 + %o3], %o2, %tie_ld(foo)
2863         add     %g7, %o2, %o4, %tie_add(foo)
2864         sethi   %tle_hix22(foo), %l1
2865         xor     %l1, %tle_lox10(foo), %o5
2866         ld      [%g7 + %o5], %o1'
2867         tls_first_major=2
2868         tls_first_minor=14
2869         tls_as_opt="-32 --fatal-warnings"
2870       fi
2871         ;;
2872   xtensa*-*-*)
2873     conftest_s='
2874         .section ".tdata","awT",@progbits
2875 foo:    .long   25
2876         .text
2877         movi    a8, foo@TLSFUNC
2878         movi    a10, foo@TLSARG
2879         callx8.tls a8, foo@TLSCALL'
2880         tls_first_major=2
2881         tls_first_minor=19
2882         ;;
2883 changequote([,])dnl
2884 esac
2885 set_have_as_tls=no
2886 if test "x$enable_tls" = xno ; then
2887   : # TLS explicitly disabled.
2888 elif test "x$enable_tls" = xyes ; then
2889   set_have_as_tls=yes # TLS explicitly enabled.
2890 elif test -z "$tls_first_major"; then
2891   : # If we don't have a check, assume no support.
2892 else
2893   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
2894   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
2895   [set_have_as_tls=yes])
2896 fi
2897 if test $set_have_as_tls = yes ; then
2898   AC_DEFINE(HAVE_AS_TLS, 1,
2899             [Define if your assembler supports thread-local storage.])
2900 fi
2901
2902 # Target-specific assembler checks.
2903
2904 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
2905 gcc_cv_ld_static_dynamic=no
2906 if test $in_tree_ld = yes ; then
2907   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
2908     gcc_cv_ld_static_dynamic=yes
2909   fi
2910 elif test x$gcc_cv_ld != x; then
2911         # Check if linker supports -Bstatic/-Bdynamic option
2912         if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
2913           && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
2914                 gcc_cv_ld_static_dynamic=yes
2915         fi
2916 fi
2917 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
2918         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
2919 [Define if your linker supports -Bstatic/-Bdynamic option.])
2920 fi
2921 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
2922
2923 if test x"$demangler_in_ld" = xyes; then
2924   AC_MSG_CHECKING(linker --demangle support)
2925   gcc_cv_ld_demangle=no
2926   if test $in_tree_ld = yes; then
2927     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
2928       gcc_cv_ld_demangle=yes
2929     fi
2930   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
2931     # Check if the GNU linker supports --demangle option
2932     if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
2933       gcc_cv_ld_demangle=yes
2934     fi
2935   fi
2936   if test x"$gcc_cv_ld_demangle" = xyes; then
2937     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
2938 [Define if your linker supports --demangle option.])
2939   fi
2940   AC_MSG_RESULT($gcc_cv_ld_demangle)
2941 fi
2942
2943 case "$target" in
2944   # All TARGET_ABI_OSF targets.
2945   alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
2946     gcc_GAS_CHECK_FEATURE([explicit relocation support],
2947         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
2948 [       .set nomacro
2949         .text
2950         extbl   $3, $2, $3      !lituse_bytoff!1
2951         ldq     $2, a($29)      !literal!1
2952         ldq     $4, b($29)      !literal!2
2953         ldq_u   $3, 0($2)       !lituse_base!1
2954         ldq     $27, f($29)     !literal!5
2955         jsr     $26, ($27), f   !lituse_jsr!5
2956         ldah    $29, 0($26)     !gpdisp!3
2957         lda     $0, c($29)      !gprel
2958         ldah    $1, d($29)      !gprelhigh
2959         lda     $1, d($1)       !gprellow
2960         lda     $29, 0($29)     !gpdisp!3],,
2961     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
2962   [Define if your assembler supports explicit relocations.])])
2963     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
2964         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
2965 [       .set nomacro
2966         .text
2967         ldq     $27, a($29)     !literal!1
2968         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
2969     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
2970   [Define if your assembler supports the lituse_jsrdirect relocation.])])
2971     ;;
2972
2973   cris-*-*)
2974     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
2975       gcc_cv_as_cris_no_mul_bug,[2,15,91],
2976       [-no-mul-bug-abort], [.text],,
2977       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
2978                 [Define if your assembler supports the -no-mul-bug-abort option.])])
2979     ;;
2980
2981   sparc*-*-*)
2982     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
2983       [.register %g2, #scratch],,
2984       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
2985                 [Define if your assembler supports .register.])])
2986
2987     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
2988       [-relax], [.text],,
2989       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
2990                 [Define if your assembler supports -relax option.])])
2991
2992     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
2993       gcc_cv_as_sparc_gotdata_op,,
2994       [-K PIC],
2995 [.text
2996 foo:
2997         nop
2998 bar:
2999         sethi %gdop_hix22(foo), %g1
3000         xor    %g1, %gdop_lox10(foo), %g1
3001         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
3002       [if test x$gcc_cv_ld != x \
3003        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3004        && (test x$gnu_ld_flag = xno \
3005            || (test x$gcc_cv_objdump != x \
3006                && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3007                   | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1)); then
3008          gcc_cv_as_sparc_gotdata_op=yes
3009        fi
3010        rm -f conftest],
3011       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3012                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3013
3014     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3015       gcc_cv_as_sparc_ua_pcrel,,
3016       [-K PIC],
3017 [.text
3018 foo:
3019         nop
3020 .data
3021 .align 4
3022 .byte 0
3023 .uaword %r_disp32(foo)],
3024       [if test x$gcc_cv_ld != x \
3025        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3026          gcc_cv_as_sparc_ua_pcrel=yes
3027        fi
3028        rm -f conftest],
3029       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3030                 [Define if your assembler and linker support unaligned PC relative relocs.])
3031
3032       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3033         gcc_cv_as_sparc_ua_pcrel_hidden,,
3034         [-K PIC],
3035 [.data
3036 .align 4
3037 .byte 0x31
3038 .uaword %r_disp32(foo)
3039 .byte 0x32, 0x33, 0x34
3040 .global foo
3041 .hidden foo
3042 foo:
3043 .skip 4],
3044         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3045          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3046          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3047             | grep ' 31000000 07323334' > /dev/null 2>&1; then
3048             if $gcc_cv_objdump -R conftest 2> /dev/null \
3049                | grep 'DISP32' > /dev/null 2>&1; then
3050                 :
3051             else
3052                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3053             fi
3054          fi
3055          rm -f conftest],
3056          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3057                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3058     ]) # unaligned pcrel relocs
3059
3060     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3061       gcc_cv_as_sparc_offsetable_lo10,,
3062       [-xarch=v9],
3063 [.text
3064         or %g1, %lo(ab) + 12, %g1
3065         or %g1, %lo(ab + 12), %g1],
3066       [if test x$gcc_cv_objdump != x \
3067        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3068           | grep ' 82106000 82106000' > /dev/null 2>&1; then
3069          gcc_cv_as_sparc_offsetable_lo10=yes
3070        fi],
3071        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3072                  [Define if your assembler supports offsetable %lo().])])
3073     ;;
3074
3075 changequote(,)dnl
3076   i[34567]86-*-* | x86_64-*-*)
3077 changequote([,])dnl
3078     case $target_os in
3079       cygwin*)
3080         # Full C++ conformance when using a shared libstdc++-v3 requires some
3081         # support from the Cygwin DLL, which in more recent versions exports
3082         # wrappers to aid in interposing and redirecting operators new, delete,
3083         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
3084         # are configuring for a version of Cygwin that exports the wrappers.
3085         if test x$host = x$target; then
3086           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
3087         else
3088           # Can't check presence of libc functions during cross-compile, so
3089           # we just have to assume we're building for an up-to-date target.
3090           gcc_ac_cygwin_dll_wrappers=yes
3091         fi
3092         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
3093           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
3094           [Define if you want to generate code by default that assumes that the
3095            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
3096     esac
3097     case $target_os in
3098       cygwin* | pe | mingw32*)
3099         # Recent binutils allows the three-operand form of ".comm" on PE.  This
3100         # definition is used unconditionally to initialise the default state of
3101         # the target option variable that governs usage of the feature.
3102         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
3103          [2,19,52],,[.comm foo,1,32])
3104         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
3105           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
3106           [Define if your assembler supports specifying the alignment
3107            of objects allocated using the GAS .comm command.])
3108         # Used for DWARF 2 in PE
3109         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
3110           gcc_cv_as_ix86_pe_secrel32,
3111           [2,15,91],,
3112 [.text
3113 foo:    nop
3114 .data
3115         .secrel32 foo],
3116           [if test x$gcc_cv_ld != x \
3117            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
3118              gcc_cv_as_ix86_pe_secrel32=yes
3119            fi
3120            rm -f conftest],
3121           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
3122             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
3123         ;;
3124     esac
3125
3126     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
3127        gcc_cv_as_ix86_filds,,,
3128        [filds mem; fists mem],,
3129        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
3130          [Define if your assembler uses filds and fists mnemonics.])])
3131
3132     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
3133        gcc_cv_as_ix86_fildq,,,
3134        [fildq mem; fistpq mem],,
3135        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
3136          [Define if your assembler uses fildq and fistq mnemonics.])])
3137
3138     gcc_GAS_CHECK_FEATURE([cmov syntax],
3139       gcc_cv_as_ix86_cmov_sun_syntax,,,
3140       [cmovl.l %edx, %eax],,
3141       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
3142         [Define if your assembler supports the Sun syntax for cmov.])])
3143
3144     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
3145       gcc_cv_as_ix86_ffreep,,,
3146       [ffreep %st(1)],,
3147       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
3148         [Define if your assembler supports the ffreep mnemonic.])])
3149
3150     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
3151       gcc_cv_as_ix86_sahf,,,
3152       [sahf],,
3153       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
3154         [Define if your assembler supports the sahf mnemonic.])])
3155
3156     gcc_GAS_CHECK_FEATURE([swap suffix],
3157       gcc_cv_as_ix86_swap,,,
3158       [movl.s %esp, %ebp],,
3159       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
3160         [Define if your assembler supports the swap suffix.])])
3161
3162     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
3163       gcc_cv_as_ix86_diff_sect_delta,,,
3164       [.section .rodata
3165 .L1:
3166         .long .L2-.L1
3167         .long .L3-.L1
3168         .text
3169 .L3:    nop
3170 .L2:    nop],,
3171       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
3172         [Define if your assembler supports the subtraction of symbols in different sections.])])
3173
3174     # This one is used unconditionally by i386.[ch]; it is to be defined
3175     # to 1 if the feature is present, 0 otherwise.
3176     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
3177         gcc_cv_as_ix86_gotoff_in_data, [2,11,0],,
3178 [       .text
3179 .L0:
3180         nop
3181         .data
3182         .long .L0@GOTOFF])
3183     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
3184       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
3185       [Define true if the assembler supports '.long foo@GOTOFF'.])
3186     ;;
3187
3188   ia64*-*-*)
3189     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
3190         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
3191 [       .text
3192         addl r15 = @ltoffx(x#), gp
3193         ;;
3194         ld8.mov r16 = [[r15]], x#],,
3195     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
3196           [Define if your assembler supports ltoffx and ldxmov relocations.])])
3197
3198     ;;
3199
3200   powerpc*-*-*)
3201     case $target in
3202       *-*-aix*) conftest_s='    .machine "pwr5"
3203         .csect .text[[PR]]
3204         mfcr 3,128';;
3205       *-*-darwin*)
3206         gcc_GAS_CHECK_FEATURE([.machine directive support],
3207           gcc_cv_as_machine_directive,,,
3208           [     .machine ppc7400])
3209         if test x$gcc_cv_as_machine_directive != xyes; then
3210           echo "*** This target requires an assembler supporting \".machine\"" >&2
3211           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
3212           test x$build = x$target && exit 1
3213         fi
3214         conftest_s='    .text
3215         mfcr r3,128';;
3216       *) conftest_s='   .machine power4
3217         .text
3218         mfcr 3,128';;
3219     esac
3220
3221     gcc_GAS_CHECK_FEATURE([mfcr field support],
3222       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
3223       [$conftest_s],,
3224       [AC_DEFINE(HAVE_AS_MFCRF, 1,
3225           [Define if your assembler supports mfcr field.])])
3226
3227     case $target in
3228       *-*-aix*) conftest_s='    .machine "pwr5"
3229         .csect .text[[PR]]
3230         popcntb 3,3';;
3231       *) conftest_s='   .machine power5
3232         .text
3233         popcntb 3,3';;
3234     esac
3235
3236     gcc_GAS_CHECK_FEATURE([popcntb support],
3237       gcc_cv_as_powerpc_popcntb, [2,17,0],,
3238       [$conftest_s],,
3239       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
3240           [Define if your assembler supports popcntb field.])])
3241
3242     case $target in
3243       *-*-aix*) conftest_s='    .machine "pwr5x"
3244         .csect .text[[PR]]
3245         frin 1,1';;
3246       *) conftest_s='   .machine power5
3247         .text
3248         frin 1,1';;
3249     esac
3250
3251     gcc_GAS_CHECK_FEATURE([fp round support],
3252       gcc_cv_as_powerpc_fprnd, [2,17,0],,
3253       [$conftest_s],,
3254       [AC_DEFINE(HAVE_AS_FPRND, 1,
3255           [Define if your assembler supports fprnd.])])
3256
3257     case $target in
3258       *-*-aix*) conftest_s='    .machine "pwr6"
3259         .csect .text[[PR]]
3260         mffgpr 1,3';;
3261       *) conftest_s='   .machine power6
3262         .text
3263         mffgpr 1,3';;
3264     esac
3265
3266     gcc_GAS_CHECK_FEATURE([move fp gpr support],
3267       gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
3268       [$conftest_s],,
3269       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
3270           [Define if your assembler supports mffgpr and mftgpr.])])
3271
3272     case $target in
3273       *-*-aix*) conftest_s='    .csect .text[[PR]]
3274 LCF..0:
3275         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
3276       *-*-darwin*)
3277         conftest_s='    .text
3278 LCF0:
3279         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
3280       *) conftest_s='   .text
3281 .LCF0:
3282         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
3283     esac
3284
3285     gcc_GAS_CHECK_FEATURE([rel16 relocs],
3286       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
3287       [$conftest_s],,
3288       [AC_DEFINE(HAVE_AS_REL16, 1,
3289           [Define if your assembler supports R_PPC_REL16 relocs.])])
3290
3291     case $target in
3292       *-*-aix*) conftest_s='    .machine "pwr6"
3293         .csect .text[[PR]]
3294         cmpb 3,4,5';;
3295       *) conftest_s='   .machine power6
3296         .text
3297         cmpb 3,4,5';;
3298     esac
3299
3300     gcc_GAS_CHECK_FEATURE([compare bytes support],
3301       gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
3302       [$conftest_s],,
3303       [AC_DEFINE(HAVE_AS_CMPB, 1,
3304           [Define if your assembler supports cmpb.])])
3305
3306     case $target in
3307       *-*-aix*) conftest_s='    .machine "pwr6"
3308         .csect .text[[PR]]
3309         dadd 1,2,3';;
3310       *) conftest_s='   .machine power6
3311         .text
3312         dadd 1,2,3';;
3313     esac
3314
3315     gcc_GAS_CHECK_FEATURE([decimal float support],
3316       gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
3317       [$conftest_s],,
3318       [AC_DEFINE(HAVE_AS_DFP, 1,
3319           [Define if your assembler supports DFP instructions.])])
3320
3321     case $target in
3322       *-*-aix*) conftest_s='    .machine "pwr7"
3323         .csect .text[[PR]]
3324         lxvd2x 1,2,3';;
3325       *) conftest_s='   .machine power7
3326         .text
3327         lxvd2x 1,2,3';;
3328     esac
3329
3330     gcc_GAS_CHECK_FEATURE([vector-scalar support],
3331       gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
3332       [$conftest_s],,
3333       [AC_DEFINE(HAVE_AS_VSX, 1,
3334           [Define if your assembler supports VSX instructions.])])
3335
3336     case $target in
3337       *-*-aix*) conftest_s='    .machine "pwr7"
3338         .csect .text[[PR]]
3339         popcntd 3,3';;
3340       *) conftest_s='   .machine power7
3341         .text
3342         popcntd 3,3';;
3343     esac
3344
3345     gcc_GAS_CHECK_FEATURE([popcntd support],
3346       gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
3347       [$conftest_s],,
3348       [AC_DEFINE(HAVE_AS_POPCNTD, 1,
3349           [Define if your assembler supports POPCNTD instructions.])])
3350
3351     case $target in
3352       *-*-aix*) conftest_s='    .csect .text[[PR]]
3353         lwsync';;
3354       *) conftest_s='   .text
3355         lwsync';;
3356     esac
3357
3358     gcc_GAS_CHECK_FEATURE([lwsync support],
3359       gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
3360       [$conftest_s],,
3361       [AC_DEFINE(HAVE_AS_LWSYNC, 1,
3362           [Define if your assembler supports LWSYNC instructions.])])
3363
3364     case $target in
3365       *-*-aix*) conftest_s='    .machine "476"
3366         .csect .text[[PR]]
3367         dci 0';;
3368       *) conftest_s='   .machine "476"
3369         .text
3370         dci 0';;
3371     esac
3372
3373     gcc_GAS_CHECK_FEATURE([data cache invalidate support],
3374       gcc_cv_as_powerpc_dci, [9,99,0], -a32,
3375       [$conftest_s],,
3376       [AC_DEFINE(HAVE_AS_DCI, 1,
3377           [Define if your assembler supports the DCI/ICI instructions.])])
3378
3379     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3380       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
3381       [.gnu_attribute 4,1],,
3382       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3383           [Define if your assembler supports .gnu_attribute.])])
3384
3385     gcc_GAS_CHECK_FEATURE([tls marker support],
3386       gcc_cv_as_powerpc_tls_markers, [2,20,0],,
3387       [ bl __tls_get_addr(x@tlsgd)],,
3388       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
3389           [Define if your assembler supports arg info for __tls_get_addr.])])
3390
3391     case $target in
3392       *-*-aix*)
3393         gcc_GAS_CHECK_FEATURE([.ref support],
3394           gcc_cv_as_aix_ref, [2.21.0],,
3395           [     .csect stuff[[rw]]
3396              stuff:
3397                 .long 1
3398                 .extern sym
3399                 .ref sym
3400           ],,
3401           [AC_DEFINE(HAVE_AS_REF, 1,
3402             [Define if your assembler supports .ref])])
3403         ;;
3404     esac
3405     ;;
3406
3407   mips*-*-*)
3408     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3409       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
3410 [       lw $4,%gp_rel(foo)($4)],,
3411       [if test x$target_cpu_default = x
3412        then target_cpu_default=MASK_EXPLICIT_RELOCS
3413        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
3414        fi])
3415     gcc_GAS_CHECK_FEATURE([-mno-shared support],
3416       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
3417       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
3418                  [Define if the assembler understands -mno-shared.])])
3419
3420     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
3421       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
3422       [.gnu_attribute 4,1],,
3423       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
3424           [Define if your assembler supports .gnu_attribute.])])
3425
3426     gcc_GAS_CHECK_FEATURE([.dtprelword support],
3427       gcc_cv_as_mips_dtprelword, [2,18,0],,
3428       [.section .tdata,"awT",@progbits
3429 x:
3430         .word 2
3431         .text
3432         .dtprelword x+0x8000],,
3433       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
3434           [Define if your assembler supports .dtprelword.])])
3435
3436     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
3437     gcc_cv_as_ld_jalr_reloc=no
3438     if test $gcc_cv_as_mips_explicit_relocs = yes; then
3439       if test $in_tree_ld = yes ; then
3440         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
3441            && test $in_tree_ld_is_elf = yes; then
3442           gcc_cv_as_ld_jalr_reloc=yes
3443         fi
3444       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
3445         echo '  .ent x' > conftest.s
3446         echo 'x:        ld $2,%got_disp(y)($3)' >> conftest.s
3447         echo '  ld $25,%call16(y)($28)' >> conftest.s
3448         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
3449         echo '1:        jalr $25' >> conftest.s
3450         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
3451         echo '1:        jalr $25' >> conftest.s
3452         echo '  .end x' >> conftest.s
3453         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
3454            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
3455           if $gcc_cv_objdump -d conftest.so | grep -q jalr \
3456              && $gcc_cv_objdump -d conftest.so | grep -q "bal.*<x>"; then
3457             gcc_cv_as_ld_jalr_reloc=yes
3458           fi
3459         fi
3460         rm -f conftest.*
3461       fi
3462     fi
3463     if test $gcc_cv_as_ld_jalr_reloc = yes; then
3464       if test x$target_cpu_default = x; then
3465         target_cpu_default=MASK_RELAX_PIC_CALLS
3466       else
3467         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
3468       fi
3469     fi
3470     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
3471
3472     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
3473       [gcc_cv_ld_mips_personality_relaxation],
3474       [gcc_cv_ld_mips_personality_relaxation=no
3475        if test $in_tree_ld = yes ; then
3476          if test "$gcc_cv_gld_major_version" -eq 2 \
3477                  -a "$gcc_cv_gld_minor_version" -ge 21 \
3478                  -o "$gcc_cv_gld_major_version" -gt 2; then
3479            gcc_cv_ld_mips_personality_relaxation=yes
3480          fi
3481        elif test x$gcc_cv_as != x \
3482                  -a x$gcc_cv_ld != x \
3483                  -a x$gcc_cv_readelf != x ; then
3484          cat > conftest.s <<EOF
3485         .cfi_startproc
3486         .cfi_personality 0x80,indirect_ptr
3487         .ent test
3488 test:
3489         nop
3490         .end test
3491         .cfi_endproc
3492
3493         .section .data,"aw",@progbits
3494 indirect_ptr:
3495         .dc.a personality
3496 EOF
3497          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
3498             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
3499            if $gcc_cv_readelf -d conftest 2>&1 \
3500               | grep TEXTREL > /dev/null 2>&1; then
3501              :
3502            elif $gcc_cv_readelf --relocs conftest 2>&1 \
3503                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
3504              :
3505            else
3506              gcc_cv_ld_mips_personality_relaxation=yes
3507            fi
3508          fi
3509        fi
3510        rm -f conftest.s conftest.o conftest])
3511     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
3512             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
3513       [Define if your linker can relax absolute .eh_frame personality
3514 pointers into PC-relative form.])
3515     fi
3516     ;;
3517 esac
3518
3519 # Mips and HP-UX need the GNU assembler.
3520 # Linux on IA64 might be able to use the Intel assembler.
3521
3522 case "$target" in
3523   mips*-*-* | *-*-hpux* )
3524     if test x$gas_flag = xyes \
3525        || test x"$host" != x"$build" \
3526        || test ! -x "$gcc_cv_as" \
3527        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
3528       :
3529     else
3530       echo "*** This configuration requires the GNU assembler" >&2
3531       exit 1
3532     fi
3533     ;;
3534 esac
3535
3536 # ??? Not all targets support dwarf2 debug_line, even within a version
3537 # of gas.  Moreover, we need to emit a valid instruction to trigger any
3538 # info to the output file.  So, as supported targets are added to gas 2.11,
3539 # add some instruction here to (also) show we expect this might work.
3540 # ??? Once 2.11 is released, probably need to add first known working
3541 # version to the per-target configury.
3542 case "$target" in
3543   i?86*-*-* | mips*-*-* | alpha*-*-* | powerpc*-*-* | sparc*-*-* | m68*-*-* \
3544   | x86_64*-*-* | hppa*-*-* | arm*-*-* \
3545   | xstormy16*-*-* | cris-*-* | crisv32-*-* | xtensa*-*-* | bfin-*-* | score*-*-* \
3546   | spu-*-* | fido*-*-* | m32c-*-*)
3547     insn="nop"
3548     ;;
3549   ia64*-*-* | s390*-*-*)
3550     insn="nop 0"
3551     ;;
3552   mmix-*-*)
3553     insn="swym 0"
3554     ;;
3555 esac
3556 if test x"$insn" != x; then
3557  conftest_s="\
3558         .file 1 \"conftest.s\"
3559         .loc 1 3 0
3560         $insn"
3561  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
3562   gcc_cv_as_dwarf2_debug_line,
3563   [elf,2,11,0],, [$conftest_s],
3564   [if test x$gcc_cv_objdump != x \
3565    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
3566       | grep debug_line > /dev/null 2>&1; then
3567      gcc_cv_as_dwarf2_debug_line=yes
3568    fi])
3569
3570 # The .debug_line file table must be in the exact order that
3571 # we specified the files, since these indices are also used
3572 # by DW_AT_decl_file.  Approximate this test by testing if
3573 # the assembler bitches if the same index is assigned twice.
3574  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
3575   gcc_cv_as_dwarf2_file_buggy,,,
3576 [       .file 1 "foo.s"
3577         .file 1 "bar.s"])
3578
3579  if test $gcc_cv_as_dwarf2_debug_line = yes \
3580  && test $gcc_cv_as_dwarf2_file_buggy = no; then
3581         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
3582   [Define if your assembler supports dwarf2 .file/.loc directives,
3583    and preserves file table indices exactly as given.])
3584  fi
3585
3586  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
3587   gcc_cv_as_gdwarf2_flag,
3588   [elf,2,11,0], [--gdwarf2], [$insn],,
3589   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
3590 [Define if your assembler supports the --gdwarf2 option.])])
3591
3592  gcc_GAS_CHECK_FEATURE([--gstabs option],
3593   gcc_cv_as_gstabs_flag,
3594   [elf,2,11,0], [--gstabs], [$insn],
3595   [# The native Solaris 9/Intel assembler doesn't understand --gstabs
3596    # and warns about it, but still exits successfully.  So check for
3597    # this.
3598    if AC_TRY_COMMAND([$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null])
3599    then :
3600    else gcc_cv_as_gstabs_flag=yes
3601    fi],
3602   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
3603 [Define if your assembler supports the --gstabs option.])])
3604
3605  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
3606   gcc_cv_as_debug_prefix_map_flag,
3607   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
3608   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
3609 [Define if your assembler supports the --debug-prefix-map option.])])
3610 fi
3611
3612 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
3613  ,,
3614 [.lcomm bar,4,16],,
3615 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
3616   [Define if your assembler supports .lcomm with an alignment field.])])
3617
3618 AC_ARG_ENABLE(gnu-unique-object,
3619  [  --enable-gnu-unique-object  enable the use of the @gnu_unique_object ELF extension on
3620                                 glibc systems],
3621  [case $enable_gnu_unique_object in
3622     yes | no) ;;
3623     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
3624 Valid choices are 'yes' and 'no'.]) ;;
3625   esac],
3626  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
3627    [elf,2,19,52],,
3628    [.type foo, @gnu_unique_object],,
3629 # Also check for ld.so support, i.e. glibc 2.11 or higher.
3630    [[if test x$host = x$build -a x$host = x$target &&
3631        glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
3632       glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
3633       glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`
3634       glibcnum=`expr $glibcmajor \* 1000 + $glibcminor`
3635       if test "$glibcnum" -ge 2011 ; then
3636         enable_gnu_unique_object=yes
3637       fi
3638     fi]])])
3639 if test x$enable_gnu_unique_object = xyes; then
3640   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
3641    [Define if your assembler supports @gnu_unique_object.])
3642 fi
3643
3644 AC_CACHE_CHECK([assembler for tolerance to line number 0],
3645  [gcc_cv_as_line_zero],
3646  [gcc_cv_as_line_zero=no
3647   if test $in_tree_gas = yes; then
3648     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
3649   elif test "x$gcc_cv_as" != x; then
3650     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
3651     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
3652        test "x`cat conftest.out`" = x
3653     then
3654       gcc_cv_as_line_zero=yes
3655     else
3656       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
3657       cat conftest.s >&AS_MESSAGE_LOG_FD
3658       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
3659       cat conftest.out >&AS_MESSAGE_LOG_FD
3660     fi
3661     rm -f conftest.o conftest.s conftest.out
3662   fi])
3663 if test "x$gcc_cv_as_line_zero" = xyes; then
3664   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
3665 [Define if the assembler won't complain about a line such as # 0 "" 2.])
3666 fi
3667
3668 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
3669 gcc_cv_ld_eh_frame_hdr=no
3670 if test $in_tree_ld = yes ; then
3671   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
3672      && test $in_tree_ld_is_elf = yes; then
3673     gcc_cv_ld_eh_frame_hdr=yes
3674   fi
3675 elif test x$gcc_cv_ld != x; then
3676         # Check if linker supports --eh-frame-hdr option
3677         if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
3678                 gcc_cv_ld_eh_frame_hdr=yes
3679         fi
3680 fi
3681 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
3682 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
3683         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
3684 [Define if your linker supports --eh-frame-hdr option.])
3685 fi
3686 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
3687
3688 AC_MSG_CHECKING(linker position independent executable support)
3689 gcc_cv_ld_pie=no
3690 if test $in_tree_ld = yes ; then
3691   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
3692      && test $in_tree_ld_is_elf = yes; then
3693     gcc_cv_ld_pie=yes
3694   fi
3695 elif test x$gcc_cv_ld != x; then
3696         # Check if linker supports -pie option
3697         if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
3698                 gcc_cv_ld_pie=yes
3699         fi
3700 fi
3701 if test x"$gcc_cv_ld_pie" = xyes; then
3702         AC_DEFINE(HAVE_LD_PIE, 1,
3703 [Define if your linker supports -pie option.])
3704 fi
3705 AC_MSG_RESULT($gcc_cv_ld_pie)
3706
3707 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
3708 gcc_cv_ld_eh_gc_sections=no
3709 if test $in_tree_ld = yes ; then
3710   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
3711      && test $in_tree_ld_is_elf = yes; then
3712     gcc_cv_ld_eh_gc_sections=yes
3713   fi
3714 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
3715   cat > conftest.s <<EOF
3716         .section        .text
3717 .globl _start
3718         .type _start, @function
3719 _start:
3720         .long foo
3721         .size _start, .-_start
3722         .section        .text.foo,"ax",@progbits
3723         .type foo, @function
3724 foo:
3725         .long 0
3726         .size foo, .-foo
3727         .section        .gcc_except_table.foo,"a",@progbits
3728 .L0:
3729         .long 0
3730         .section        .eh_frame,"a",@progbits
3731         .long .L0
3732 EOF
3733   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3734     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3735          | grep "gc-sections option ignored" > /dev/null; then
3736       gcc_cv_ld_eh_gc_sections=no
3737     elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
3738       gcc_cv_ld_eh_gc_sections=yes
3739       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
3740       if test x$gcc_cv_as_comdat_group != xyes; then
3741         gcc_cv_ld_eh_gc_sections=no
3742         cat > conftest.s <<EOF
3743         .section        .text
3744 .globl _start
3745         .type _start, @function
3746 _start:
3747         .long foo
3748         .size _start, .-_start
3749         .section        .gnu.linkonce.t.foo,"ax",@progbits
3750         .type foo, @function
3751 foo:
3752         .long 0
3753         .size foo, .-foo
3754         .section        .gcc_except_table.foo,"a",@progbits
3755 .L0:
3756         .long 0
3757         .section        .eh_frame,"a",@progbits
3758         .long .L0
3759 EOF
3760         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
3761           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
3762                | grep "gc-sections option ignored" > /dev/null; then
3763             gcc_cv_ld_eh_gc_sections=no
3764           elif $gcc_cv_objdump -h conftest | grep gcc_except_table > /dev/null; then
3765             gcc_cv_ld_eh_gc_sections=yes
3766           fi
3767         fi
3768       fi
3769     fi
3770   fi
3771   rm -f conftest.s conftest.o conftest
3772 fi
3773 case "$target" in
3774   hppa*-*-linux*)
3775     # ??? This apparently exposes a binutils bug with PC-relative relocations.
3776     gcc_cv_ld_eh_gc_sections=no
3777     ;;
3778 esac
3779 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
3780         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
3781   [Define if your linker supports garbage collection of
3782    sections in presence of EH frames.])
3783 fi
3784 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
3785
3786 # --------
3787 # UNSORTED
3788 # --------
3789
3790 AC_CACHE_CHECK(linker --as-needed support,
3791 gcc_cv_ld_as_needed,
3792 [gcc_cv_ld_as_needed=no
3793 if test $in_tree_ld = yes ; then
3794   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
3795      && test $in_tree_ld_is_elf = yes; then
3796     gcc_cv_ld_as_needed=yes
3797   fi
3798 elif test x$gcc_cv_ld != x; then
3799         # Check if linker supports --as-needed and --no-as-needed options
3800         if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
3801                 gcc_cv_ld_as_needed=yes
3802         fi
3803 fi
3804 ])
3805 if test x"$gcc_cv_ld_as_needed" = xyes; then
3806         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
3807 [Define if your linker supports --as-needed and --no-as-needed options.])
3808 fi
3809
3810 case "$target:$tm_file" in
3811   powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
3812     AC_CACHE_CHECK(linker support for omitting dot symbols,
3813     gcc_cv_ld_no_dot_syms,
3814     [gcc_cv_ld_no_dot_syms=no
3815     if test $in_tree_ld = yes ; then
3816       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
3817         gcc_cv_ld_no_dot_syms=yes
3818       fi
3819     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
3820       cat > conftest1.s <<EOF
3821         .text
3822         bl .foo
3823 EOF
3824       cat > conftest2.s <<EOF
3825         .section ".opd","aw"
3826         .align 3
3827         .globl foo
3828         .type foo,@function
3829 foo:
3830         .quad .LEfoo,.TOC.@tocbase,0
3831         .text
3832 .LEfoo:
3833         blr
3834         .size foo,.-.LEfoo
3835 EOF
3836       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
3837          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
3838          && $gcc_cv_ld -melf64ppc -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
3839         gcc_cv_ld_no_dot_syms=yes
3840       fi
3841       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
3842     fi
3843     ])
3844     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
3845       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
3846     [Define if your PowerPC64 linker only needs function descriptor syms.])
3847     fi
3848     ;;
3849 esac
3850
3851 AC_CACHE_CHECK(linker --build-id support,
3852   gcc_cv_ld_buildid,
3853   [gcc_cv_ld_buildid=no
3854   if test $in_tree_ld = yes ; then
3855     if test "$gcc_cv_gld_major_version" -eq 2 -a \
3856        "$gcc_cv_gld_minor_version" -ge 18 -o \
3857        "$gcc_cv_gld_major_version" -gt 2 \
3858        && test $in_tree_ld_is_elf = yes; then
3859       gcc_cv_ld_buildid=yes
3860     fi
3861   elif test x$gcc_cv_ld != x; then
3862     if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
3863       gcc_cv_ld_buildid=yes
3864     fi
3865   fi])
3866 if test x"$gcc_cv_ld_buildid" = xyes; then
3867   AC_DEFINE(HAVE_LD_BUILDID, 1,
3868   [Define if your linker supports --build-id.])
3869 fi
3870
3871 AC_ARG_ENABLE(linker-build-id,
3872 [  --enable-linker-build-id
3873                           compiler will always pass --build-id to linker],
3874 [],
3875 enable_linker_build_id=no)
3876
3877 if test x"$enable_linker_build_id" = xyes; then
3878   if test x"$gcc_cv_ld_buildid" = xyes; then
3879     AC_DEFINE(ENABLE_LD_BUILDID, 1,
3880     [Define if gcc should always pass --build-id to linker.])
3881   else
3882     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
3883   fi
3884 fi
3885
3886 AC_CACHE_CHECK(linker --sysroot support,
3887   gcc_cv_ld_sysroot,
3888   [gcc_cv_ld_sysroot=no
3889   if test $in_tree_ld = yes ; then
3890       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
3891         gcc_cv_ld_sysroot=yes
3892       fi
3893   elif test x$gcc_cv_ld != x; then
3894     if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
3895       gcc_cv_ld_sysroot=yes
3896     fi
3897   fi])
3898 if test x"$gcc_cv_ld_sysroot" = xyes; then
3899   AC_DEFINE(HAVE_LD_SYSROOT, 1,
3900   [Define if your linker supports --sysroot.])
3901 fi
3902
3903 if test x$with_sysroot = x && test x$host = x$target \
3904    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
3905    && test "$prefix" != "NONE"; then
3906   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
3907 [Define to PREFIX/include if cpp should also search that directory.])
3908 fi
3909
3910 # Test for stack protector support in target C library.
3911 AC_CACHE_CHECK(__stack_chk_fail in target C library,
3912       gcc_cv_libc_provides_ssp,
3913       [gcc_cv_libc_provides_ssp=no
3914     case "$target" in
3915        *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
3916       if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
3917         if test "x$with_headers" != x; then
3918           glibc_header_dir=$with_headers
3919         elif test "x$with_sysroot" = x; then
3920           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
3921         elif test "x$with_build_sysroot" != "x"; then
3922           glibc_header_dir="${with_build_sysroot}/usr/include"
3923         elif test "x$with_sysroot" = xyes; then
3924           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
3925         else
3926           glibc_header_dir="${with_sysroot}/usr/include"
3927         fi
3928       else
3929         glibc_header_dir=/usr/include
3930       fi
3931       [# glibc 2.4 and later provides __stack_chk_fail and
3932       # either __stack_chk_guard, or TLS access to stack guard canary.
3933       if test -f $glibc_header_dir/features.h \
3934          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
3935             $glibc_header_dir/features.h > /dev/null; then
3936         if $EGREP '^[   ]*#[    ]*define[       ]+__GLIBC__[    ]+([1-9][0-9]|[3-9])' \
3937            $glibc_header_dir/features.h > /dev/null; then
3938           gcc_cv_libc_provides_ssp=yes
3939         elif $EGREP '^[         ]*#[    ]*define[       ]+__GLIBC__[    ]+2' \
3940              $glibc_header_dir/features.h > /dev/null \
3941              && $EGREP '^[      ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+([1-9][0-9]|[4-9])' \
3942              $glibc_header_dir/features.h > /dev/null; then
3943           gcc_cv_libc_provides_ssp=yes
3944         elif $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
3945              $glibc_header_dir/features.h > /dev/null && \
3946              test -f $glibc_header_dir/bits/uClibc_config.h && \
3947              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
3948              $glibc_header_dir/bits/uClibc_config.h > /dev/null; then
3949           gcc_cv_libc_provides_ssp=yes
3950         fi
3951       fi]
3952         ;;
3953        *-*-gnu*)
3954          # Avoid complicated tests (see
3955          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
3956          # simply assert that glibc does provide this, which is true for all
3957          # realistically usable GNU/Hurd configurations.
3958          gcc_cv_libc_provides_ssp=yes;;
3959        *-*-darwin* | *-*-freebsd*)
3960          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
3961            [echo "no __stack_chk_fail on this target"])
3962         ;;
3963   *) gcc_cv_libc_provides_ssp=no ;;
3964     esac])
3965
3966 if test x$gcc_cv_libc_provides_ssp = xyes; then
3967   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
3968             [Define if your target C library provides stack protector support])
3969 fi
3970
3971 # Check if TFmode long double should be used by default or not.
3972 # Some glibc targets used DFmode long double, but with glibc 2.4
3973 # and later they can use TFmode.
3974 case "$target" in
3975   powerpc*-*-linux* | \
3976   powerpc*-*-gnu* | \
3977   sparc*-*-linux* | \
3978   s390*-*-linux* | \
3979   alpha*-*-linux*)
3980     AC_ARG_WITH(long-double-128,
3981 [  --with-long-double-128  Use 128-bit long double by default.],
3982       gcc_cv_target_ldbl128="$with_long_double_128",
3983       [[gcc_cv_target_ldbl128=no
3984       if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
3985         if test "x$with_sysroot" = x; then
3986           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-include"
3987         elif test "x$with_build_sysroot" != "x"; then
3988           glibc_header_dir="${with_build_sysroot}/usr/include"
3989         elif test "x$with_sysroot" = xyes; then
3990           glibc_header_dir="${exec_prefix}/${target_noncanonical}/sys-root/usr/include"
3991         else
3992           glibc_header_dir="${with_sysroot}/usr/include"
3993         fi
3994       else
3995         glibc_header_dir=/usr/include
3996       fi
3997       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
3998         $glibc_header_dir/bits/wordsize.h > /dev/null 2>&1 \
3999       && gcc_cv_target_ldbl128=yes
4000       ]])
4001     ;;
4002 esac
4003 if test x$gcc_cv_target_ldbl128 = xyes; then
4004   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
4005             [Define if TFmode long double should be the default])
4006 fi
4007
4008 # Find out what GC implementation we want, or may, use.
4009 AC_ARG_WITH(gc,
4010 [  --with-gc={page,zone}   choose the garbage collection mechanism to use
4011                           with the compiler],
4012 [case "$withval" in
4013   page)
4014     GGC=ggc-$withval
4015     ;;
4016   zone)
4017     GGC=ggc-$withval
4018     AC_DEFINE(GGC_ZONE, 1, [Define if the zone collector is in use])
4019     ;;
4020   *)
4021     AC_MSG_ERROR([$withval is an invalid option to --with-gc])
4022     ;;
4023 esac],
4024 [GGC=ggc-page])
4025 AC_SUBST(GGC)
4026 echo "Using $GGC for garbage collection."
4027
4028 # Libraries to use on the host.  This will normally be set by the top
4029 # level Makefile.  Here we simply capture the value for our Makefile.
4030 if test -z "${HOST_LIBS+set}"; then
4031   HOST_LIBS=
4032 fi
4033 AC_SUBST(HOST_LIBS)
4034
4035 # Use the system's zlib library.
4036 zlibdir=-L../zlib
4037 zlibinc="-I\$(srcdir)/../zlib"
4038 AC_ARG_WITH(system-zlib,
4039 [  --with-system-zlib      use installed libz],
4040 zlibdir=
4041 zlibinc=
4042 )
4043 AC_SUBST(zlibdir)
4044 AC_SUBST(zlibinc)
4045
4046 dnl Very limited version of automake's enable-maintainer-mode
4047
4048 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
4049   dnl maintainer-mode is disabled by default
4050   AC_ARG_ENABLE(maintainer-mode,
4051 [  --enable-maintainer-mode
4052                           enable make rules and dependencies not useful
4053                           (and sometimes confusing) to the casual installer],
4054       maintainer_mode=$enableval,
4055       maintainer_mode=no)
4056
4057 AC_MSG_RESULT($maintainer_mode)
4058
4059 if test "$maintainer_mode" = "yes"; then
4060   MAINT=''
4061 else
4062   MAINT='#'
4063 fi
4064 AC_SUBST(MAINT)dnl
4065
4066 # --------------
4067 # Language hooks
4068 # --------------
4069
4070 # Make empty files to contain the specs and options for each language.
4071 # Then add #include lines to for a compiler that has specs and/or options.
4072
4073 subdirs=
4074 lang_opt_files=
4075 lang_specs_files=
4076 lang_tree_files=
4077 # These (without "all_") are set in each config-lang.in.
4078 # `language' must be a single word so is spelled singularly.
4079 all_languages=
4080 all_compilers=
4081 all_outputs='Makefile gccbug'
4082 # List of language makefile fragments.
4083 all_lang_makefrags=
4084 # List of language subdirectory makefiles.  Deprecated.
4085 all_lang_makefiles=
4086 # Additional files for gengtype
4087 all_gtfiles="$target_gtfiles"
4088
4089 # These are the languages that are set in --enable-languages,
4090 # and are available in the GCC tree.
4091 all_selected_languages=
4092
4093 # Add the language fragments.
4094 # Languages are added via two mechanisms.  Some information must be
4095 # recorded in makefile variables, these are defined in config-lang.in.
4096 # We accumulate them and plug them into the main Makefile.
4097 # The other mechanism is a set of hooks for each of the main targets
4098 # like `clean', `install', etc.
4099
4100 language_hooks="Make-hooks"
4101
4102 for lang in ${srcdir}/*/config-lang.in
4103 do
4104 changequote(,)dnl
4105         test "$lang" = "${srcdir}/*/config-lang.in" && continue
4106
4107         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
4108         if test "x$lang_alias" = x
4109         then
4110               echo "$lang doesn't set \$language." 1>&2
4111               exit 1
4112         fi
4113         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
4114         subdirs="$subdirs $subdir"
4115
4116         # $gcc_subdir is where the gcc integration files are to be found
4117         # for a language, both for internal compiler purposes (compiler
4118         # sources implementing front-end to GCC tree converters), and for
4119         # build infrastructure purposes (Make-lang.in, etc.)
4120         #
4121         # This will be <subdir> (relative to $srcdir) if a line like
4122         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
4123         # is found in <langdir>/config-lang.in, and will remain <langdir>
4124         # otherwise.
4125         #
4126         # Except for the language alias (fetched above), the regular
4127         # "config-lang.in" contents are always retrieved from $gcc_subdir,
4128         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
4129         # only this and the language alias.
4130
4131         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
4132         if [ "$gcc_subdir" = "" ]; then
4133            gcc_subdir="$subdir"
4134         fi
4135
4136         case ",$enable_languages," in
4137         *,$lang_alias,*)
4138             all_selected_languages="$all_selected_languages $lang_alias"
4139             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
4140                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
4141             fi
4142             ;;
4143         esac
4144 changequote([,])dnl
4145
4146         language=
4147         boot_language=
4148         compilers=
4149         outputs=
4150         gtfiles=
4151         subdir_requires=
4152         . ${srcdir}/$gcc_subdir/config-lang.in
4153         if test "x$language" = x
4154         then
4155                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
4156                 exit 1
4157         fi
4158
4159         ok=:
4160         case ",$enable_languages," in
4161                 *,$lang_alias,*) ;;
4162                 *)
4163                         for i in $subdir_requires; do
4164                                 test -f "${srcdir}/$i/config-lang.in" && continue
4165                                 ok=false
4166                                 break
4167                         done
4168                 ;;
4169         esac
4170         $ok || continue
4171
4172         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
4173         if test -f $srcdir/$gcc_subdir/lang.opt; then
4174             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
4175         fi
4176         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
4177             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
4178         fi
4179         if test -f ${srcdir}/$gcc_subdir/Makefile.in
4180                 then all_lang_makefiles="$gcc_subdir/Makefile"
4181         fi
4182         all_languages="$all_languages $language"
4183         all_compilers="$all_compilers $compilers"
4184         all_outputs="$all_outputs $outputs"
4185         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
4186         case ",$enable_languages," in
4187                 *,lto,*)
4188                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
4189                     enable_lto=yes
4190                     AC_SUBST(enable_lto)
4191                     ;;
4192                 *) ;;
4193         esac
4194 done
4195
4196 # Pick up gtfiles for c
4197 gtfiles=
4198 . ${srcdir}/c-config-lang.in
4199 all_gtfiles="$all_gtfiles [[c]] $gtfiles"
4200
4201 check_languages=
4202 for language in $all_selected_languages
4203 do
4204         check_languages="$check_languages check-$language"
4205 done
4206
4207 # We link each language in with a set of hooks, reached indirectly via
4208 # lang.${target}.  Only do so for selected languages.
4209
4210 rm -f Make-hooks
4211 touch Make-hooks
4212 target_list="all.cross start.encap rest.encap tags \
4213         install-common install-man install-info install-pdf install-html dvi \
4214         pdf html uninstall info man srcextra srcman srcinfo \
4215         mostlyclean clean distclean maintainer-clean install-plugin"
4216
4217 for t in $target_list
4218 do
4219         x=
4220         for lang in $all_selected_languages
4221         do
4222                 x="$x $lang.$t"
4223         done
4224         echo "lang.$t: $x" >> Make-hooks
4225 done
4226
4227 # --------
4228 # UNSORTED
4229 # --------
4230
4231 # Create .gdbinit.
4232
4233 echo "dir ." > .gdbinit
4234 echo "dir ${srcdir}" >> .gdbinit
4235 if test x$gdb_needs_out_file_path = xyes
4236 then
4237         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
4238 fi
4239 if test "x$subdirs" != x; then
4240         for s in $subdirs
4241         do
4242                 echo "dir ${srcdir}/$s" >> .gdbinit
4243         done
4244 fi
4245 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
4246
4247 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
4248 AC_SUBST(gcc_tooldir)
4249 AC_SUBST(dollar)
4250
4251 # Find a directory in which to install a shared libgcc.
4252
4253 AC_ARG_ENABLE(version-specific-runtime-libs,
4254 [  --enable-version-specific-runtime-libs
4255                           specify that runtime libraries should be
4256                           installed in a compiler-specific directory])
4257
4258 AC_ARG_WITH(slibdir,
4259 [  --with-slibdir=DIR      shared libraries in DIR [[LIBDIR]]],
4260 slibdir="$with_slibdir",
4261 if test "${enable_version_specific_runtime_libs+set}" = set; then
4262   slibdir='$(libsubdir)'
4263 elif test "$host" != "$target"; then
4264   slibdir='$(build_tooldir)/lib'
4265 else
4266   slibdir='$(libdir)'
4267 fi)
4268 AC_SUBST(slibdir)
4269
4270 # Substitute configuration variables
4271 AC_SUBST(subdirs)
4272 AC_SUBST(srcdir)
4273 AC_SUBST(all_compilers)
4274 AC_SUBST(all_gtfiles)
4275 AC_SUBST(all_lang_makefrags)
4276 AC_SUBST(all_lang_makefiles)
4277 AC_SUBST(all_languages)
4278 AC_SUBST(all_selected_languages)
4279 AC_SUBST(build_exeext)
4280 AC_SUBST(build_install_headers_dir)
4281 AC_SUBST(build_xm_file_list)
4282 AC_SUBST(build_xm_include_list)
4283 AC_SUBST(build_xm_defines)
4284 AC_SUBST(build_file_translate)
4285 AC_SUBST(check_languages)
4286 AC_SUBST(cpp_install_dir)
4287 AC_SUBST(xmake_file)
4288 AC_SUBST(tmake_file)
4289 AC_SUBST(TM_ENDIAN_CONFIG)
4290 AC_SUBST(TM_MULTILIB_CONFIG)
4291 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
4292 AC_SUBST(extra_gcc_objs)
4293 AC_SUBST(extra_headers_list)
4294 AC_SUBST(extra_objs)
4295 AC_SUBST(extra_parts)
4296 AC_SUBST(extra_passes)
4297 AC_SUBST(extra_programs)
4298 AC_SUBST(float_h_file)
4299 AC_SUBST(gcc_config_arguments)
4300 AC_SUBST(gcc_gxx_include_dir)
4301 AC_SUBST(host_exeext)
4302 AC_SUBST(host_xm_file_list)
4303 AC_SUBST(host_xm_include_list)
4304 AC_SUBST(host_xm_defines)
4305 AC_SUBST(out_host_hook_obj)
4306 AC_SUBST(install)
4307 AC_SUBST(lang_opt_files)
4308 AC_SUBST(lang_specs_files)
4309 AC_SUBST(lang_tree_files)
4310 AC_SUBST(local_prefix)
4311 AC_SUBST(md_file)
4312 AC_SUBST(objc_boehm_gc)
4313 AC_SUBST(out_file)
4314 AC_SUBST(out_object_file)
4315 AC_SUBST(thread_file)
4316 AC_SUBST(tm_file_list)
4317 AC_SUBST(tm_include_list)
4318 AC_SUBST(tm_defines)
4319 AC_SUBST(tm_p_file_list)
4320 AC_SUBST(tm_p_include_list)
4321 AC_SUBST(xm_file_list)
4322 AC_SUBST(xm_include_list)
4323 AC_SUBST(xm_defines)
4324 AC_SUBST(use_gcc_stdint)
4325 AC_SUBST(c_target_objs)
4326 AC_SUBST(cxx_target_objs)
4327 AC_SUBST(fortran_target_objs)
4328 AC_SUBST(target_cpu_default)
4329
4330 AC_SUBST_FILE(language_hooks)
4331
4332 # Echo link setup.
4333 if test x${build} = x${host} ; then
4334   if test x${host} = x${target} ; then
4335     echo "Links are now set up to build a native compiler for ${target}." 1>&2
4336   else
4337     echo "Links are now set up to build a cross-compiler" 1>&2
4338     echo " from ${host} to ${target}." 1>&2
4339   fi
4340 else
4341   if test x${host} = x${target} ; then
4342     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
4343     echo " for ${target}." 1>&2
4344   else
4345     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
4346     echo " from ${host} to ${target}." 1>&2
4347   fi
4348 fi
4349
4350 AC_ARG_VAR(GMPLIBS,[How to link GMP])
4351 AC_ARG_VAR(GMPINC,[How to find GMP include files])
4352
4353 AC_ARG_VAR(PPLLIBS,[How to link PPL])
4354 AC_ARG_VAR(PPLINC,[How to find PPL include files])
4355
4356 AC_ARG_VAR(CLOOGLIBS,[How to link CLOOG])
4357 AC_ARG_VAR(CLOOGINC,[How to find CLOOG include files])
4358 if test "x${CLOOGLIBS}" != "x" ; then
4359    AC_DEFINE(HAVE_cloog, 1, [Define if cloog is in use.])
4360 fi
4361
4362 AC_ARG_VAR(LIBELFLIBS,[How to link libelf])
4363 AC_ARG_VAR(LIBELFINC,[How to find libelf include files])
4364 if test "x${LIBELFLIBS}" != "x" ; then
4365    AC_DEFINE(HAVE_libelf, 1, [Define if libelf is in use.])
4366 fi
4367
4368 # Check for plugin support
4369 AC_ARG_ENABLE(plugin,
4370 [  --enable-plugin         enable plugin support],
4371 enable_plugin=$enableval,
4372 enable_plugin=yes; default_plugin=yes)
4373
4374 pluginlibs=
4375 if test x"$enable_plugin" = x"yes"; then
4376
4377   AC_MSG_CHECKING([for exported symbols])
4378   echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
4379   ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
4380   if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
4381     : # No need to use a flag
4382   else
4383     AC_MSG_CHECKING([for -rdynamic])
4384     ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null 2>&1
4385     if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
4386       pluginlibs="-rdynamic"
4387     else
4388       enable_plugin=no
4389     fi
4390   fi
4391
4392   # Check -ldl
4393   saved_LIBS="$LIBS"
4394   AC_SEARCH_LIBS([dlopen], [dl])
4395   if test x"$ac_cv_search_dlopen" = x"-ldl"; then
4396     pluginlibs="$pluginlibs -ldl"
4397   fi
4398   LIBS="$saved_LIBS"
4399
4400   # Check that we can build shared objects with -fPIC -shared
4401   saved_LDFLAGS="$LDFLAGS"
4402   LDFLAGS="$LDFLAGS -fPIC -shared"
4403   AC_MSG_CHECKING([for -fPIC -shared])
4404   AC_TRY_LINK(
4405     [extern int X;],[return X == 0;],
4406     [AC_MSG_RESULT([yes]); have_pic_shared=yes],
4407     [AC_MSG_RESULT([no]); have_pic_shared=no])
4408   if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
4409     pluginlibs=
4410     enable_plugin=no
4411   fi
4412   LDFLAGS="$saved_LDFLAGS"
4413
4414   # If plugin support had been requested but not available, fail.
4415   if test x"$enable_plugin" = x"no" ; then
4416     if test x"$default_plugin" != x"yes"; then
4417       AC_MSG_ERROR([
4418 Building GCC with plugin support requires a host that supports
4419 -fPIC, -shared, -ldl and -rdynamic.])
4420     fi
4421   fi
4422 fi
4423
4424 AC_SUBST(pluginlibs)
4425 AC_SUBST(enable_plugin)
4426 if test x"$enable_plugin" = x"yes"; then
4427   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
4428 fi
4429
4430 # Configure the subdirectories
4431 # AC_CONFIG_SUBDIRS($subdirs)
4432
4433 # Create the Makefile
4434 # and configure language subdirectories
4435 AC_CONFIG_FILES($all_outputs)
4436
4437 AC_CONFIG_COMMANDS([default],
4438 [
4439 case ${CONFIG_HEADERS} in
4440   *auto-host.h:config.in*)
4441   echo > cstamp-h ;;
4442 esac
4443 # Make sure all the subdirs exist.
4444 for d in $subdirs doc build
4445 do
4446     test -d $d || mkdir $d
4447 done
4448 ],
4449 [subdirs='$subdirs'])
4450 AC_OUTPUT