configure.ac

   1 #   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2 #   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012,
   3 #   2014, 2015, 2016, 2019, 2022 Free Software Foundation, Inc.
   4 #
   5 # This file is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  18
  19 ##############################################################################
  20 ### WARNING: this file contains embedded tabs.  Do not run untabify on this file.
  21
  22 m4_include(config/acx.m4)
  23 m4_include(config/override.m4)
  24 m4_include(config/proginstall.m4)
  25 m4_include(config/elf.m4)
  26 m4_include(config/ax_cxx_compile_stdcxx.m4)
  27 m4_include([libtool.m4])
  28 m4_include([ltoptions.m4])
  29 m4_include([ltsugar.m4])
  30 m4_include([ltversion.m4])
  31 m4_include([lt~obsolete.m4])
  32 m4_include([config/isl.m4])
  33
  34 AC_INIT(move-if-change)
  35 AC_DISABLE_OPTION_CHECKING
  36
  37 progname=$0
  38 # if PWD already has a value, it is probably wrong.
  39 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  40
  41 # Export original configure arguments for use by sub-configures.
  42 # Quote arguments with shell meta charatcers.
  43 TOPLEVEL_CONFIGURE_ARGUMENTS=
  44 set -- "$progname" "$@"
  45 for ac_arg
  46 do
  47   case "$ac_arg" in
  48   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  49     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  50     # if the argument is of the form -foo=baz, quote the baz part only
  51     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  52   *) ;;
  53   esac
  54   # Add the quoted argument to the list.
  55   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  56 done
  57 if test "$silent" = yes; then
  58   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  59 fi
  60 # Remove the initial space we just introduced and, as these will be
  61 # expanded by make, quote '$'.
  62 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  63 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  64
  65 # Find the build, host, and target systems.
  66 ACX_NONCANONICAL_BUILD
  67 ACX_NONCANONICAL_HOST
  68 ACX_NONCANONICAL_TARGET
  69
  70 dnl Autoconf 2.5x and later will set a default program prefix if
  71 dnl --target was used, even if it was the same as --host.  Disable
  72 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  73 dnl to take effect.
  74 test "$host_noncanonical" = "$target_noncanonical" &&
  75   test "$program_prefix$program_suffix$program_transform_name" = \
  76     NONENONEs,x,x, &&
  77   program_transform_name=s,y,y,
  78
  79 AC_CANONICAL_SYSTEM
  80 AC_ARG_PROGRAM
  81
  82 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  83 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  84
  85 # Get 'install' or 'install-sh' and its variants.
  86 AC_PROG_INSTALL
  87 ACX_PROG_LN
  88 AC_PROG_LN_S
  89 AC_PROG_SED
  90 AC_PROG_AWK
  91
  92 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  93
  94 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  95 # a relative path.
  96 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  97   INSTALL="${srcpwd}/install-sh -c"
  98 fi
  99
 100 # Set srcdir to "." if that's what it is.
 101 # This is important for multilib support.
 102 pwd=`${PWDCMD-pwd}`
 103 if test "${pwd}" = "${srcpwd}" ; then
 104   srcdir=.
 105 fi
 106
 107 topsrcdir=$srcpwd
 108
 109 extra_host_args=
 110
 111 ### To add a new directory to the tree, first choose whether it is a target
 112 ### or a host dependent tool.  Then put it into the appropriate list
 113 ### (library or tools, host or target), doing a dependency sort.
 114
 115 # Subdirs will be configured in the order listed in build_configdirs,
 116 # configdirs, or target_configdirs; see the serialization section below.
 117
 118 # Dependency sorting is only needed when *configuration* must be done in
 119 # a particular order.  In all cases a dependency should be specified in
 120 # the Makefile, whether or not it's implicitly specified here.
 121
 122 # Double entries in build_configdirs, configdirs, or target_configdirs may
 123 # cause circular dependencies and break everything horribly.
 124
 125 # these library is used by various programs built for the build
 126 # environment
 127 #
 128 build_libs="build-libiberty build-libcpp"
 129
 130 # these tools are built for the build environment
 131 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 132
 133 # these libraries are used by various programs built for the host environment
 134 #f
 135 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libcody libdecnumber gmp mpfr mpc isl libiconv libctf libsframe"
 136
 137 # these tools are built for the host environment
 138 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 139 # know that we are building the simulator.
 140 # binutils, gas and ld appear in that order because it makes sense to run
 141 # "make check" in that particular order.
 142 # If --enable-gold is used, "gold" may replace "ld".
 143 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gdbserver gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gm2tools gotools c++tools"
 144
 145 # these libraries are built for the target environment, and are built after
 146 # the host libraries and the host tools (which may be a cross compiler)
 147 # Note that libiberty is not a target library.
 148 target_libraries="target-libgcc \
 149                 target-libbacktrace \
 150                 target-libgloss \
 151                 target-newlib \
 152                 target-libgomp \
 153                 target-libatomic \
 154                 target-libitm \
 155                 target-libstdc++-v3 \
 156                 target-libsanitizer \
 157                 target-libvtv \
 158                 target-libssp \
 159                 target-libquadmath \
 160                 target-libgfortran \
 161                 target-libffi \
 162                 target-libobjc \
 163                 target-libada \
 164                 target-libgm2 \
 165                 target-libgo \
 166                 target-libphobos \
 167                 target-zlib"
 168
 169 # these tools are built using the target libraries, and are intended to
 170 # run only in the target environment
 171 #
 172 # note: any program that *uses* libraries that are in the "target_libraries"
 173 # list belongs in this list.
 174 #
 175 target_tools="target-rda"
 176
 177 ################################################################################
 178
 179 ## All tools belong in one of the four categories, and are assigned above
 180 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 181 ## is important because configure will choke if they ever get through.
 182 ## ${configdirs} is directories we build using the host tools.
 183 ## ${target_configdirs} is directories we build using the target tools.
 184 configdirs=`echo ${host_libs} ${host_tools}`
 185 target_configdirs=`echo ${target_libraries} ${target_tools}`
 186 build_configdirs=`echo ${build_libs} ${build_tools}`
 187
 188 m4_divert_text([PARSE_ARGS],
 189 [case $srcdir in
 190   *" "*)
 191 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 192     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 193 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 194     ;;
 195 esac
 196 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 197 ])
 198
 199 ################################################################################
 200
 201 srcname="gnu development package"
 202
 203 # This gets set non-empty for some net releases of packages.
 204 appdirs=""
 205
 206 # Define is_cross_compiler to save on calls to 'test'.
 207 is_cross_compiler=
 208 if test x"${host}" = x"${target}" ; then
 209   is_cross_compiler=no
 210 else
 211   is_cross_compiler=yes
 212 fi
 213
 214 # Find the build and target subdir names.
 215 GCC_TOPLEV_SUBDIRS
 216 # Be sure to cover against remnants of an in-tree build.
 217 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 218   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 219 Use a pristine source tree when building in a separate tree])
 220 fi
 221
 222 # Skipdirs are removed silently.
 223 skipdirs=
 224 # Noconfigdirs are removed loudly.
 225 noconfigdirs=""
 226
 227 use_gnu_ld=
 228 # Make sure we don't let GNU ld be added if we didn't want it.
 229 if test x$with_gnu_ld = xno ; then
 230   use_gnu_ld=no
 231   noconfigdirs="$noconfigdirs ld gold"
 232 fi
 233
 234 use_gnu_as=
 235 # Make sure we don't let GNU as be added if we didn't want it.
 236 if test x$with_gnu_as = xno ; then
 237   use_gnu_as=no
 238   noconfigdirs="$noconfigdirs gas"
 239 fi
 240
 241 use_included_zlib=
 242 AC_ARG_WITH(system-zlib,
 243 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 244 # Make sure we don't let ZLIB be added if we didn't want it.
 245 if test x$with_system_zlib = xyes ; then
 246   use_included_zlib=no
 247   noconfigdirs="$noconfigdirs zlib"
 248 fi
 249
 250 # Don't compile the bundled readline/libreadline.a if --with-system-readline
 251 # is provided.
 252 if test x$with_system_readline = xyes ; then
 253   noconfigdirs="$noconfigdirs readline"
 254 fi
 255
 256 # some tools are so dependent upon X11 that if we're not building with X,
 257 # it's not even worth trying to configure, much less build, that tool.
 258
 259 case ${with_x} in
 260   yes | "") ;; # the default value for this tree is that X11 is available
 261   no)
 262     skipdirs="${skipdirs} tk itcl libgui"
 263     # We won't be able to build gdbtk without X.
 264     enable_gdbtk=no
 265     ;;
 266   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 267 esac
 268
 269 # Some are only suitable for cross toolchains.
 270 # Remove these if host=target.
 271 cross_only="target-libgloss target-newlib target-opcodes"
 272
 273 case $is_cross_compiler in
 274   no) skipdirs="${skipdirs} ${cross_only}" ;;
 275 esac
 276
 277 # If both --with-headers and --with-libs are specified, default to
 278 # --without-newlib.
 279 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 280    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 281   if test x"${with_newlib}" = x ; then
 282     with_newlib=no
 283   fi
 284 fi
 285
 286 # Recognize --with-newlib/--without-newlib.
 287 case ${with_newlib} in
 288   no) skipdirs="${skipdirs} target-newlib" ;;
 289   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 290 esac
 291
 292 AC_ARG_ENABLE(as-accelerator-for,
 293 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 294                 [build as offload target compiler.
 295                 Specify offload host triple by ARG])])
 296
 297 AC_ARG_ENABLE(offload-targets,
 298 [AS_HELP_STRING([--enable-offload-targets=LIST],
 299                 [enable offloading to devices from comma-separated LIST of
 300                 TARGET[=DIR]. Use optional path to find offload target compiler
 301                 during the build])],
 302 [
 303   if test x"$enable_offload_targets" = x; then
 304     AC_MSG_ERROR([no offload targets specified])
 305   fi
 306 ], [enable_offload_targets=])
 307
 308 AC_ARG_ENABLE(offload-defaulted,
 309 [AS_HELP_STRING([--enable-offload-defaulted]
 310                 [If enabled, configured but not installed offload compilers and
 311                 libgomp plugins are silently ignored.  Useful for distribution
 312                 compilers where those are in separate optional packages.])],
 313 [enable_offload_defaulted=$enableval],
 314 [enable_offload_defaulted=])
 315
 316 # Handle --enable-gold, --enable-ld.
 317 # --disable-gold [--enable-ld]
 318 #     Build only ld.  Default option.
 319 # --enable-gold [--enable-ld]
 320 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 321 #     as "ld.bfd" and "ld".
 322 # --enable-gold=default [--enable-ld]
 323 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 324 #     install ld as "ld.bfd".
 325 # --enable-gold[=default] --disable-ld
 326 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 327 # --enable-gold --enable-ld=default
 328 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 329 #     and ld.bfd).
 330 #     In other words, ld is default
 331 # --enable-gold=default --enable-ld=default
 332 #     Error.
 333
 334 default_ld=
 335 AC_ARG_ENABLE(gold,
 336 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 337                 [build gold @<:@ARG={default,yes,no}@:>@])],
 338 ENABLE_GOLD=$enableval,
 339 ENABLE_GOLD=no)
 340 case "${ENABLE_GOLD}" in
 341   yes|default)
 342     # Check for ELF target.
 343     is_elf=no
 344     case "${target}" in
 345       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 346       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 347       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 348       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 349         case "${target}" in
 350           *-*-linux*aout* | *-*-linux*oldld*)
 351             ;;
 352           *)
 353             is_elf=yes
 354             ;;
 355         esac
 356     esac
 357
 358     if test "$is_elf" = "yes"; then
 359       # Check for target supported by gold.
 360       case "${target}" in
 361         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 362         | aarch64*-*-* | mips*-*-* | s390*-*-* | loongarch*-*-*)
 363           configdirs="$configdirs gold"
 364           if test x${ENABLE_GOLD} = xdefault; then
 365             default_ld=gold
 366           fi
 367           ENABLE_GOLD=yes
 368           ;;
 369       esac
 370     fi
 371     ;;
 372   no)
 373     ;;
 374   *)
 375     AC_MSG_ERROR([invalid --enable-gold argument])
 376     ;;
 377 esac
 378
 379 AC_ARG_ENABLE(ld,
 380 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 381                 [build ld @<:@ARG={default,yes,no}@:>@])],
 382 ENABLE_LD=$enableval,
 383 ENABLE_LD=yes)
 384
 385 case "${ENABLE_LD}" in
 386   default)
 387     if test x${default_ld} != x; then
 388       AC_MSG_ERROR([either gold or ld can be the default ld])
 389     fi
 390     ;;
 391   yes)
 392     ;;
 393   no)
 394     if test x${ENABLE_GOLD} != xyes; then
 395       AC_MSG_WARN([neither ld nor gold are enabled])
 396     fi
 397     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 398     ;;
 399   *)
 400     AC_MSG_ERROR([invalid --enable-ld argument])
 401     ;;
 402 esac
 403
 404 # PR gas/19109
 405 # Decide the default method for compressing debug sections.
 406 # Provide a configure time option to override our default.
 407 AC_ARG_ENABLE(compressed_debug_sections,
 408 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 409                 [Enable compressed debug sections for gas, gold or ld by
 410                  default])],
 411 [
 412   if test x"$enable_compressed_debug_sections" = xyes; then
 413     AC_MSG_ERROR([no program with compressed debug sections specified])
 414   fi
 415 ], [enable_compressed_debug_sections=])
 416
 417 # Configure extra directories which are host specific
 418
 419 case "${host}" in
 420   *-cygwin*)
 421     configdirs="$configdirs libtermcap" ;;
 422 esac
 423
 424 # A target can indicate whether a language isn't supported for some reason.
 425 # Only spaces may be used in this macro; not newlines or tabs.
 426 unsupported_languages=
 427
 428 # Remove more programs from consideration, based on the host or
 429 # target this usually means that a port of the program doesn't
 430 # exist yet.
 431
 432 case "${host}" in
 433   i[[3456789]]86-*-msdosdjgpp*)
 434     noconfigdirs="$noconfigdirs tcl tk itcl"
 435     ;;
 436 esac
 437
 438
 439 AC_ARG_ENABLE(libquadmath,
 440 AS_HELP_STRING([--disable-libquadmath],
 441   [do not build libquadmath directory]),
 442 ENABLE_LIBQUADMATH=$enableval,
 443 ENABLE_LIBQUADMATH=yes)
 444 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 445   noconfigdirs="$noconfigdirs target-libquadmath"
 446 fi
 447
 448
 449 AC_ARG_ENABLE(libquadmath-support,
 450 AS_HELP_STRING([--disable-libquadmath-support],
 451   [disable libquadmath support for Fortran]),
 452 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 453 ENABLE_LIBQUADMATH_SUPPORT=yes)
 454 enable_libquadmath_support=
 455 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 456   enable_libquadmath_support=no
 457 fi
 458
 459
 460 AC_ARG_ENABLE(libada,
 461 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 462 ENABLE_LIBADA=$enableval,
 463 ENABLE_LIBADA=yes)
 464 if test "${ENABLE_LIBADA}" != "yes" ; then
 465   noconfigdirs="$noconfigdirs gnattools"
 466 fi
 467
 468 AC_ARG_ENABLE(libgm2,
 469 [AS_HELP_STRING([--enable-libgm2], [build libgm2 directory])],
 470 ENABLE_LIBGM2=$enableval,
 471 ENABLE_LIBGM2=no)
 472 if test "${ENABLE_LIBGM2}" != "yes" ; then
 473   noconfigdirs="$noconfigdirs gm2tools"
 474 fi
 475
 476 AC_ARG_ENABLE(libssp,
 477 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 478 ENABLE_LIBSSP=$enableval,
 479 ENABLE_LIBSSP=yes)
 480
 481 AC_ARG_ENABLE(libstdcxx,
 482 AS_HELP_STRING([--disable-libstdcxx],
 483   [do not build libstdc++-v3 directory]),
 484 ENABLE_LIBSTDCXX=$enableval,
 485 ENABLE_LIBSTDCXX=default)
 486 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 487   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 488 fi]
 489
 490 # Enable libgomp by default on hosted POSIX systems, and a few others.
 491 if test x$enable_libgomp = x ; then
 492     case "${target}" in
 493     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 494         ;;
 495     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 496         ;;
 497     *-*-solaris2* | *-*-hpux11*)
 498         ;;
 499     *-*-darwin* | *-*-aix*)
 500         ;;
 501     nvptx*-*-* | amdgcn*-*-*)
 502         ;;
 503     *)
 504         noconfigdirs="$noconfigdirs target-libgomp"
 505         ;;
 506     esac
 507 fi
 508
 509 # Disable libatomic on unsupported systems.
 510 if test -d ${srcdir}/libatomic; then
 511     if test x$enable_libatomic = x; then
 512         AC_MSG_CHECKING([for libatomic support])
 513         if (srcdir=${srcdir}/libatomic; \
 514                 . ${srcdir}/configure.tgt; \
 515                 test -n "$UNSUPPORTED")
 516         then
 517             AC_MSG_RESULT([no])
 518             noconfigdirs="$noconfigdirs target-libatomic"
 519         else
 520             AC_MSG_RESULT([yes])
 521         fi
 522     fi
 523 fi
 524
 525 # Disable libitm on unsupported systems.
 526 if test -d ${srcdir}/libitm; then
 527     if test x$enable_libitm = x; then
 528         AC_MSG_CHECKING([for libitm support])
 529         if (srcdir=${srcdir}/libitm; \
 530                 . ${srcdir}/configure.tgt; \
 531                 test -n "$UNSUPPORTED")
 532         then
 533             AC_MSG_RESULT([no])
 534             noconfigdirs="$noconfigdirs target-libitm"
 535         else
 536             AC_MSG_RESULT([yes])
 537         fi
 538     fi
 539 fi
 540
 541 # Disable libsanitizer on unsupported systems.
 542 if test -d ${srcdir}/libsanitizer; then
 543     if test x$enable_libsanitizer = x; then
 544         AC_MSG_CHECKING([for libsanitizer support])
 545         if (srcdir=${srcdir}/libsanitizer; \
 546                 . ${srcdir}/configure.tgt; \
 547                 test -n "$UNSUPPORTED")
 548         then
 549             AC_MSG_RESULT([no])
 550             noconfigdirs="$noconfigdirs target-libsanitizer"
 551         else
 552             AC_MSG_RESULT([yes])
 553         fi
 554     fi
 555 fi
 556
 557 # Disable libvtv on unsupported systems.
 558 if test -d ${srcdir}/libvtv; then
 559     if test x$enable_libvtv = x; then
 560         AC_MSG_CHECKING([for libvtv support])
 561         if (srcdir=${srcdir}/libvtv; \
 562                 . ${srcdir}/configure.tgt; \
 563                 test "$VTV_SUPPORTED" != "yes")
 564         then
 565             AC_MSG_RESULT([no])
 566             noconfigdirs="$noconfigdirs target-libvtv"
 567         else
 568             AC_MSG_RESULT([yes])
 569         fi
 570     fi
 571 fi
 572
 573 # Disable libquadmath for some systems.
 574 case "${target}" in
 575   avr-*-*)
 576     noconfigdirs="$noconfigdirs target-libquadmath"
 577     ;;
 578   # libquadmath is unused on AIX and libquadmath build process use of
 579   # LD_LIBRARY_PATH can break AIX bootstrap.
 580   powerpc-*-aix* | rs6000-*-aix*)
 581     noconfigdirs="$noconfigdirs target-libquadmath"
 582     ;;
 583 esac
 584
 585 # Disable libssp for some systems.
 586 case "${target}" in
 587   avr-*-*)
 588     # No hosted I/O support.
 589     noconfigdirs="$noconfigdirs target-libssp"
 590     ;;
 591   bpf-*-*)
 592     noconfigdirs="$noconfigdirs target-libssp"
 593     ;;
 594   powerpc-*-aix* | rs6000-*-aix*)
 595     noconfigdirs="$noconfigdirs target-libssp"
 596     ;;
 597   pru-*-*)
 598     # No hosted I/O support.
 599     noconfigdirs="$noconfigdirs target-libssp"
 600     ;;
 601   rl78-*-*)
 602     # libssp uses a misaligned load to trigger a fault, but the RL78
 603     # doesn't fault for those - instead, it gives a build-time error
 604     # for explicit misaligned loads.
 605     noconfigdirs="$noconfigdirs target-libssp"
 606     ;;
 607   visium-*-*)
 608     # No hosted I/O support.
 609     noconfigdirs="$noconfigdirs target-libssp"
 610     ;;
 611 esac
 612
 613 # Disable libstdc++-v3 for some systems.
 614 # Allow user to override this if they pass --enable-libstdcxx
 615 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 616   case "${target}" in
 617     *-*-vxworks*)
 618       # VxWorks uses the Dinkumware C++ library.
 619       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 620       ;;
 621     amdgcn*-*-*)
 622       # Not ported/fails to build when using newlib.
 623       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 624       ;;
 625     arm*-wince-pe*)
 626       # the C++ libraries don't build on top of CE's C libraries
 627       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 628       ;;
 629     avr-*-*)
 630       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 631       ;;
 632     bpf-*-*)
 633       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 634       ;;
 635     ft32-*-*)
 636       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 637       ;;
 638   esac
 639 fi
 640
 641 # Disable C++ on systems where it is known to not work.
 642 # For testing, you can override this with --enable-languages=c++.
 643 case ,${enable_languages}, in
 644   *,c++,*)
 645     ;;
 646   *)
 647       case "${target}" in
 648         bpf-*-*)
 649           unsupported_languages="$unsupported_languages c++"
 650           ;;
 651       esac
 652       ;;
 653 esac
 654
 655 # Disable Objc on systems where it is known to not work.
 656 # For testing, you can override this with --enable-languages=objc.
 657 case ,${enable_languages}, in
 658   *,objc,*)
 659     ;;
 660   *)
 661       case "${target}" in
 662         bpf-*-*)
 663           unsupported_languages="$unsupported_languages objc"
 664           ;;
 665       esac
 666       ;;
 667 esac
 668
 669 # Disable D on systems where it is known to not work.
 670 # For testing, you can override this with --enable-languages=d.
 671 case ,${enable_languages}, in
 672   *,d,*)
 673     ;;
 674   *)
 675     case "${target}" in
 676       bpf-*-*)
 677         unsupported_languages="$unsupported_languages d"
 678         ;;
 679     esac
 680     ;;
 681 esac
 682
 683 # Disable libphobos on unsupported systems.
 684 # For testing, you can override this with --enable-libphobos.
 685 if test -d ${srcdir}/libphobos; then
 686     if test x$enable_libphobos = x; then
 687         AC_MSG_CHECKING([for libphobos support])
 688         if (srcdir=${srcdir}/libphobos; \
 689                 . ${srcdir}/configure.tgt; \
 690                 test "$LIBPHOBOS_SUPPORTED" != "yes")
 691         then
 692             AC_MSG_RESULT([no])
 693             noconfigdirs="$noconfigdirs target-libphobos"
 694         else
 695             AC_MSG_RESULT([yes])
 696         fi
 697     fi
 698 fi
 699
 700 # Disable Fortran for some systems.
 701 case "${target}" in
 702   mmix-*-*)
 703     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 704     unsupported_languages="$unsupported_languages fortran"
 705     ;;
 706   bpf-*-*)
 707     unsupported_languages="$unsupported_languages fortran"
 708     ;;
 709 esac
 710
 711 # Disable libffi for some systems.
 712 case "${target}" in
 713   powerpc-*-darwin*)
 714     ;;
 715   i[[3456789]]86-*-darwin*)
 716     ;;
 717   x86_64-*-darwin[[912]]*)
 718     ;;
 719   *-*-darwin*)
 720     noconfigdirs="$noconfigdirs target-libffi"
 721     ;;
 722   *-*-netware*)
 723     noconfigdirs="$noconfigdirs target-libffi"
 724     ;;
 725   *-*-phoenix*)
 726     noconfigdirs="$noconfigdirs target-libffi"
 727     ;;
 728   *-*-rtems*)
 729     noconfigdirs="$noconfigdirs target-libffi"
 730     ;;
 731   *-*-tpf*)
 732     noconfigdirs="$noconfigdirs target-libffi"
 733     ;;
 734   *-*-uclinux*)
 735     noconfigdirs="$noconfigdirs target-libffi"
 736     ;;
 737   *-*-vxworks*)
 738     noconfigdirs="$noconfigdirs target-libffi"
 739     ;;
 740   aarch64*-*-freebsd*)
 741     noconfigdirs="$noconfigdirs target-libffi"
 742     ;;
 743   alpha*-*-*vms*)
 744     noconfigdirs="$noconfigdirs target-libffi"
 745     ;;
 746   arm*-*-freebsd*)
 747     noconfigdirs="$noconfigdirs target-libffi"
 748     ;;
 749   arm-wince-pe)
 750     noconfigdirs="$noconfigdirs target-libffi"
 751     ;;
 752   arm*-*-symbianelf*)
 753     noconfigdirs="$noconfigdirs target-libffi"
 754     ;;
 755   bpf-*-*)
 756     noconfigdirs="$noconfigdirs target-libffi"
 757     ;;
 758   cris-*-* | crisv32-*-*)
 759     case "${target}" in
 760       *-*-linux*)
 761         ;;
 762       *) # See PR46792 regarding target-libffi.
 763         noconfigdirs="$noconfigdirs target-libffi";;
 764     esac
 765     ;;
 766   hppa*64*-*-hpux*)
 767     noconfigdirs="$noconfigdirs target-libffi"
 768     ;;
 769   ia64*-*-*vms*)
 770     noconfigdirs="$noconfigdirs target-libffi"
 771     ;;
 772   i[[3456789]]86-w64-mingw*)
 773     noconfigdirs="$noconfigdirs target-libffi"
 774     ;;
 775   i[[3456789]]86-*-mingw*)
 776     noconfigdirs="$noconfigdirs target-libffi"
 777     ;;
 778   x86_64-*-mingw*)
 779     noconfigdirs="$noconfigdirs target-libffi"
 780     ;;
 781   mmix-*-*)
 782     noconfigdirs="$noconfigdirs target-libffi"
 783     ;;
 784   powerpc-*-aix*)
 785     ;;
 786   rs6000-*-aix*)
 787     ;;
 788   ft32-*-*)
 789     noconfigdirs="$noconfigdirs target-libffi"
 790     ;;
 791   *-*-lynxos*)
 792     noconfigdirs="$noconfigdirs target-libffi"
 793     ;;
 794 esac
 795
 796 # Disable the go frontend on systems where it is known to not work. Please keep
 797 # this in sync with contrib/config-list.mk.
 798 case "${target}" in
 799 *-*-darwin* | *-*-cygwin* | *-*-mingw* | bpf-* )
 800     unsupported_languages="$unsupported_languages go"
 801     ;;
 802 esac
 803
 804 # Only allow gdbserver on some systems.
 805 if test -d ${srcdir}/gdbserver; then
 806     if test x$enable_gdbserver = x; then
 807         AC_MSG_CHECKING([for gdbserver support])
 808         if (srcdir=${srcdir}/gdbserver; \
 809                 . ${srcdir}/configure.srv; \
 810                 test -n "$UNSUPPORTED")
 811         then
 812             AC_MSG_RESULT([no])
 813             noconfigdirs="$noconfigdirs gdbserver"
 814         else
 815             AC_MSG_RESULT([yes])
 816         fi
 817     fi
 818 fi
 819
 820 # Disable libgo for some systems where it is known to not work.
 821 # For testing, you can easily override this with --enable-libgo.
 822 if test x$enable_libgo = x; then
 823     case "${target}" in
 824     *-*-darwin*)
 825         # PR 46986
 826         noconfigdirs="$noconfigdirs target-libgo"
 827         ;;
 828     *-*-cygwin* | *-*-mingw*)
 829         noconfigdirs="$noconfigdirs target-libgo"
 830         ;;
 831     bpf-*-*)
 832         noconfigdirs="$noconfigdirs target-libgo"
 833         ;;
 834     esac
 835 fi
 836
 837 # Default libgloss CPU subdirectory.
 838 libgloss_dir="$target_cpu"
 839
 840 case "${target}" in
 841   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 842     libgloss_dir=wince
 843     ;;
 844   aarch64*-*-* )
 845     libgloss_dir=aarch64
 846     ;;
 847   arm*-*-*)
 848     libgloss_dir=arm
 849     ;;
 850   cris-*-* | crisv32-*-*)
 851     libgloss_dir=cris
 852     ;;
 853   hppa*-*-*)
 854     libgloss_dir=pa
 855     ;;
 856   i[[3456789]]86-*-*)
 857     libgloss_dir=i386
 858     ;;
 859   loongarch*-*-*)
 860     libgloss_dir=loongarch
 861     ;;
 862   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 863     libgloss_dir=m68hc11
 864     ;;
 865   m68*-*-* | fido-*-*)
 866     libgloss_dir=m68k
 867     ;;
 868   mips*-*-*)
 869     libgloss_dir=mips
 870     ;;
 871   powerpc*-*-*)
 872     libgloss_dir=rs6000
 873     ;;
 874   pru-*-*)
 875     libgloss_dir=pru
 876     ;;
 877   sparc*-*-*)
 878     libgloss_dir=sparc
 879     ;;
 880 esac
 881
 882 # Disable newlib and libgloss for various target OSes.
 883 case "${target}" in
 884   alpha*-dec-osf*)
 885     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 886     ;;
 887   i[[3456789]]86-*-linux*)
 888     # This section makes it possible to build newlib natively on linux.
 889     # If we are using a cross compiler then don't configure newlib.
 890     if test x${is_cross_compiler} != xno ; then
 891       noconfigdirs="$noconfigdirs target-newlib"
 892     fi
 893     noconfigdirs="$noconfigdirs target-libgloss"
 894     # If we are not using a cross compiler, do configure newlib.
 895     # Note however, that newlib will only be configured in this situation
 896     # if the --with-newlib option has been given, because otherwise
 897     # 'target-newlib' will appear in skipdirs.
 898     ;;
 899   i[[3456789]]86-*-rdos*)
 900     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 901     ;;
 902   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 903     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 904     ;;
 905   sparc-*-sunos4*)
 906     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 907     ;;
 908   bpf-*-*)
 909     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 910     ;;
 911   *-*-aix*)
 912     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 913     ;;
 914   *-*-beos*)
 915     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 916     ;;
 917   *-*-chorusos)
 918     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 919     ;;
 920   *-*-dragonfly*)
 921     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 922     ;;
 923   *-*-freebsd*)
 924     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 925     ;;
 926   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 927     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 928     ;;
 929   *-*-lynxos*)
 930     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 931     ;;
 932   *-*-mingw*)
 933     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 934     ;;
 935   *-*-netbsd*)
 936     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 937     ;;
 938   *-*-netware*)
 939     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 940     ;;
 941   *-*-tpf*)
 942     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 943     ;;
 944   *-*-uclinux*)
 945     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 946     ;;
 947   *-*-vxworks*)
 948     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 949     ;;
 950 esac
 951
 952 case "${target}" in
 953   *-*-chorusos)
 954     ;;
 955   aarch64-*-darwin*)
 956     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 957     noconfigdirs="$noconfigdirs sim target-rda"
 958     ;;
 959   amdgcn*-*-*)
 960     ;;
 961   arm-*-darwin*)
 962     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 963     noconfigdirs="$noconfigdirs sim target-rda"
 964     ;;
 965   powerpc-*-darwin*)
 966     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 967     noconfigdirs="$noconfigdirs sim target-rda"
 968     ;;
 969   i[[3456789]]86-*-darwin*)
 970     noconfigdirs="$noconfigdirs ld gprof"
 971     noconfigdirs="$noconfigdirs sim target-rda"
 972     ;;
 973   x86_64-*-darwin[[912]]*)
 974     noconfigdirs="$noconfigdirs ld gas gprof"
 975     noconfigdirs="$noconfigdirs sim target-rda"
 976     ;;
 977   *-*-darwin*)
 978     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 979     noconfigdirs="$noconfigdirs sim target-rda"
 980     ;;
 981   *-*-dragonfly*)
 982     ;;
 983   *-*-freebsd*)
 984     if test "x$with_gmp" = x \
 985         && ! test -d ${srcdir}/gmp \
 986         && test -f /usr/local/include/gmp.h; then
 987       with_gmp=/usr/local
 988     fi
 989     ;;
 990   *-*-kaos*)
 991     # Remove unsupported stuff on all kaOS configurations.
 992     noconfigdirs="$noconfigdirs target-libgloss"
 993     ;;
 994   *-*-netbsd*)
 995     ;;
 996   *-*-netware*)
 997     ;;
 998   *-*-phoenix*)
 999     noconfigdirs="$noconfigdirs target-libgloss"
1000     ;;
1001   *-*-rtems*)
1002     noconfigdirs="$noconfigdirs target-libgloss"
1003     ;;
1004     # The tpf target doesn't support gdb yet.
1005   *-*-tpf*)
1006     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
1007     ;;
1008   *-*-uclinux*)
1009     noconfigdirs="$noconfigdirs target-rda"
1010     ;;
1011   *-*-vxworks*)
1012     ;;
1013   alpha*-dec-osf*)
1014     # ld works, but does not support shared libraries.
1015     # gas doesn't generate exception information.
1016     noconfigdirs="$noconfigdirs gas ld"
1017     ;;
1018   alpha*-*-*vms*)
1019     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1020     ;;
1021   alpha*-*-*)
1022     # newlib is not 64 bit ready
1023     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1024     ;;
1025   bpf-*-*)
1026     noconfigdirs="$noconfigdirs target-libobjc target-libbacktrace"
1027     ;;
1028   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1029     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1030     ;;
1031   arc*-*-*)
1032     noconfigdirs="$noconfigdirs sim"
1033     ;;
1034   arm-*-pe*)
1035     noconfigdirs="$noconfigdirs target-libgloss"
1036     ;;
1037   arm-*-riscix*)
1038     noconfigdirs="$noconfigdirs ld target-libgloss"
1039     ;;
1040   avr-*-*)
1041     if test x${with_avrlibc} != xno; then
1042       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1043     fi
1044     ;;
1045   c4x-*-* | tic4x-*-*)
1046     noconfigdirs="$noconfigdirs target-libgloss"
1047     ;;
1048   tic54x-*-*)
1049     noconfigdirs="$noconfigdirs target-libgloss gdb"
1050     ;;
1051   d10v-*-*)
1052     noconfigdirs="$noconfigdirs target-libgloss"
1053     ;;
1054   d30v-*-*)
1055     noconfigdirs="$noconfigdirs gdb"
1056     ;;
1057   fr30-*-elf*)
1058     noconfigdirs="$noconfigdirs gdb"
1059     ;;
1060   ft32-*-*)
1061     noconfigdirs="$noconfigdirs target-rda gprof"
1062     ;;
1063   moxie-*-*)
1064     noconfigdirs="$noconfigdirs"
1065     ;;
1066   h8300*-*-*)
1067     noconfigdirs="$noconfigdirs target-libgloss"
1068     ;;
1069   h8500-*-*)
1070     noconfigdirs="$noconfigdirs target-libgloss"
1071     ;;
1072   hppa*64*-*-hpux*)
1073     noconfigdirs="$noconfigdirs gdb"
1074     ;;
1075   hppa*64*-*-linux*)
1076     ;;
1077   hppa*-*-linux*)
1078     ;;
1079   hppa*-*-*elf* | \
1080   hppa*-*-lites* | \
1081   hppa*-*-openbsd* | \
1082   hppa*64*-*-*)
1083     ;;
1084   hppa*-*-pro*)
1085     ;;
1086   hppa*-*-*)
1087     noconfigdirs="$noconfigdirs ld"
1088     ;;
1089   i960-*-*)
1090     noconfigdirs="$noconfigdirs gdb"
1091     ;;
1092   ia64*-*-elf*)
1093     # No gdb support yet.
1094     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1095     ;;
1096   ia64*-**-hpux*)
1097     # No ld support yet.
1098     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1099     ;;
1100   ia64*-*-*vms*)
1101     # No ld support yet.
1102     noconfigdirs="$noconfigdirs libgui itcl ld"
1103     ;;
1104   i[[3456789]]86-w64-mingw*)
1105     ;;
1106   i[[3456789]]86-*-mingw*)
1107     target_configdirs="$target_configdirs target-winsup"
1108     ;;
1109   *-*-cygwin*)
1110     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1111     noconfigdirs="$noconfigdirs target-libgloss"
1112     # always build newlib if winsup directory is present.
1113     if test -d "$srcdir/winsup/cygwin"; then
1114       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1115     elif test -d "$srcdir/newlib"; then
1116       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1117     fi
1118     ;;
1119   i[[3456789]]86-*-pe)
1120     noconfigdirs="$noconfigdirs target-libgloss"
1121     ;;
1122   i[[3456789]]86-*-sco3.2v5*)
1123     # The linker does not yet know about weak symbols in COFF,
1124     # and is not configured to handle mixed ELF and COFF.
1125     noconfigdirs="$noconfigdirs ld target-libgloss"
1126     ;;
1127   i[[3456789]]86-*-sco*)
1128     noconfigdirs="$noconfigdirs gprof target-libgloss"
1129     ;;
1130   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1131     noconfigdirs="$noconfigdirs target-libgloss"
1132     ;;
1133   i[[3456789]]86-*-sysv4*)
1134     noconfigdirs="$noconfigdirs target-libgloss"
1135     ;;
1136   i[[3456789]]86-*-beos*)
1137     noconfigdirs="$noconfigdirs gdb"
1138     ;;
1139   i[[3456789]]86-*-rdos*)
1140     noconfigdirs="$noconfigdirs gdb"
1141     ;;
1142   mmix-*-*)
1143     noconfigdirs="$noconfigdirs gdb"
1144     ;;
1145   mt-*-*)
1146     noconfigdirs="$noconfigdirs sim"
1147     ;;
1148   nfp-*-*)
1149     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1150     noconfigdirs="$noconfigdirs $target_libraries"
1151     ;;
1152   pdp11-*-*)
1153     noconfigdirs="$noconfigdirs gdb gprof"
1154     ;;
1155   powerpc-*-aix*)
1156     # copied from rs6000-*-* entry
1157     noconfigdirs="$noconfigdirs gprof"
1158     ;;
1159   powerpc*-*-winnt* | powerpc*-*-pe*)
1160     target_configdirs="$target_configdirs target-winsup"
1161     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1162     # always build newlib.
1163     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1164     ;;
1165     # This is temporary until we can link against shared libraries
1166   powerpcle-*-solaris*)
1167     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1168     ;;
1169   powerpc-*-beos*)
1170     noconfigdirs="$noconfigdirs gdb"
1171     ;;
1172   rs6000-*-lynxos*)
1173     noconfigdirs="$noconfigdirs gprof"
1174     ;;
1175   rs6000-*-aix*)
1176     noconfigdirs="$noconfigdirs gprof"
1177     ;;
1178   rs6000-*-*)
1179     noconfigdirs="$noconfigdirs gprof"
1180     ;;
1181   m68k-apollo-*)
1182     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1183     ;;
1184   microblaze*)
1185     noconfigdirs="$noconfigdirs gprof"
1186     ;;
1187   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1188     if test x$with_newlib = xyes; then
1189       noconfigdirs="$noconfigdirs gprof"
1190     fi
1191     ;;
1192   mips*-*-irix5*)
1193     noconfigdirs="$noconfigdirs gprof target-libgloss"
1194     ;;
1195   mips*-*-irix6*)
1196     noconfigdirs="$noconfigdirs gprof target-libgloss"
1197     ;;
1198   mips*-*-bsd*)
1199     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1200     ;;
1201   mips*-*-linux*)
1202     ;;
1203   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1204   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1205     noconfigdirs="$noconfigdirs ld gas gprof"
1206     ;;
1207   mips*-*-*)
1208     noconfigdirs="$noconfigdirs gprof"
1209     ;;
1210   nvptx*-*-*)
1211     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1212     ;;
1213   sh-*-*)
1214     case "${target}" in
1215       sh*-*-elf)
1216          ;;
1217       *)
1218          noconfigdirs="$noconfigdirs target-libgloss" ;;
1219     esac
1220     ;;
1221   sparc-*-sunos4*)
1222     if test x${is_cross_compiler} = xno ; then
1223            use_gnu_ld=no
1224     fi
1225     ;;
1226   tic6x-*-*)
1227     noconfigdirs="$noconfigdirs sim"
1228     ;;
1229   v810-*-*)
1230     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1231     ;;
1232   vax-*-*)
1233     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1234     ;;
1235   wasm32-*-*)
1236     noconfigdirs="$noconfigdirs ld"
1237     ;;
1238   loongarch*-*-linux*)
1239     ;;
1240   loongarch*-*-*)
1241     noconfigdirs="$noconfigdirs gprof"
1242     ;;
1243 esac
1244
1245 # If we aren't building newlib, then don't build libgloss, since libgloss
1246 # depends upon some newlib header files.
1247 case "${noconfigdirs}" in
1248   *target-libgloss*) ;;
1249   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1250 esac
1251
1252 # Work in distributions that contain no compiler tools, like Autoconf.
1253 host_makefile_frag=/dev/null
1254 if test -d ${srcdir}/config ; then
1255 case "${host}" in
1256   i[[3456789]]86-*-msdosdjgpp*)
1257     host_makefile_frag="config/mh-djgpp"
1258     ;;
1259   *-cygwin*)
1260     ACX_CHECK_CYGWIN_CAT_WORKS
1261     host_makefile_frag="config/mh-cygwin"
1262     ;;
1263   *-mingw*)
1264     host_makefile_frag="config/mh-mingw"
1265     ;;
1266   alpha*-linux*)
1267     host_makefile_frag="config/mh-alpha-linux"
1268     ;;
1269   hppa*-hp-hpux*)
1270     host_makefile_frag="config/mh-pa"
1271     ;;
1272   hppa*-*)
1273     host_makefile_frag="config/mh-pa"
1274     ;;
1275   i?86-*-darwin[[89]]* | i?86-*-darwin1[[0-7]]* | powerpc*-*-darwin*)
1276     host_makefile_frag="config/mh-darwin"
1277     ;;
1278   powerpc-*-aix*)
1279     host_makefile_frag="config/mh-ppc-aix"
1280     ;;
1281   rs6000-*-aix*)
1282     host_makefile_frag="config/mh-ppc-aix"
1283     ;;
1284 esac
1285 fi
1286
1287 if test "${build}" != "${host}" ; then
1288   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1289   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1290   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1291   CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CC_FOR_BUILD) -E}"
1292   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1293   DSYMUTIL_FOR_BUILD=${DSYMUTIL_FOR_BUILD-dsymutil}
1294   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1295   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1296   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1297   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1298   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1299   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1300   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1301   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1302   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1303 else
1304   AR_FOR_BUILD="\$(AR)"
1305   AS_FOR_BUILD="\$(AS)"
1306   CC_FOR_BUILD="\$(CC)"
1307   CXX_FOR_BUILD="\$(CXX)"
1308   DSYMUTIL_FOR_BUILD="\$(DSYMUTIL)"
1309   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1310   GOC_FOR_BUILD="\$(GOC)"
1311   GDC_FOR_BUILD="\$(GDC)"
1312   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1313   LD_FOR_BUILD="\$(LD)"
1314   NM_FOR_BUILD="\$(NM)"
1315   RANLIB_FOR_BUILD="\$(RANLIB)"
1316   WINDRES_FOR_BUILD="\$(WINDRES)"
1317   WINDMC_FOR_BUILD="\$(WINDMC)"
1318 fi
1319
1320 AC_PROG_CC_C99
1321 AC_PROG_CXX
1322
1323 # We must set the default linker to the linker used by gcc for the correct
1324 # operation of libtool.  If LD is not defined and we are using gcc, try to
1325 # set the LD default to the ld used by gcc.
1326 if test -z "$LD"; then
1327   if test "$GCC" = yes; then
1328     case $build in
1329     *-*-mingw*)
1330       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1331     *)
1332       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1333     esac
1334     case $gcc_prog_ld in
1335     # Accept absolute paths.
1336     [[\\/]* | [A-Za-z]:[\\/]*)]
1337       LD="$gcc_prog_ld" ;;
1338     esac
1339   fi
1340 fi
1341
1342 # Check whether -static-libstdc++ -static-libgcc is supported.
1343 have_static_libs=no
1344 if test "$GCC" = yes; then
1345   saved_LDFLAGS="$LDFLAGS"
1346
1347   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1348   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1349   AC_LANG_PUSH(C++)
1350   AC_LINK_IFELSE([AC_LANG_SOURCE([
1351 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1352 #error -static-libstdc++ not implemented
1353 #endif
1354 int main() {}])],
1355     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1356     [AC_MSG_RESULT([no])])
1357   AC_LANG_POP(C++)
1358
1359   LDFLAGS="$saved_LDFLAGS"
1360 fi
1361
1362 ACX_PROG_GNAT
1363 ACX_PROG_GDC
1364 ACX_PROG_CMP_IGNORE_INITIAL
1365
1366 AC_ARG_ENABLE([bootstrap],
1367 [AS_HELP_STRING([--enable-bootstrap],
1368                 [enable bootstrapping @<:@yes if native build@:>@])],,
1369 enable_bootstrap=default)
1370
1371 # Issue errors and warnings for invalid/strange bootstrap combinations.
1372 if test -r $srcdir/gcc/configure; then
1373   have_compiler=yes
1374 else
1375   have_compiler=no
1376 fi
1377
1378 case "$have_compiler:$host:$target:$enable_bootstrap" in
1379   *:*:*:no) ;;
1380
1381   # Default behavior.  Enable bootstrap if we have a compiler
1382   # and we are in a native configuration.
1383   yes:$build:$build:default)
1384     enable_bootstrap=yes ;;
1385
1386   *:*:*:default)
1387     enable_bootstrap=no ;;
1388
1389   # We have a compiler and we are in a native configuration, bootstrap is ok
1390   yes:$build:$build:yes)
1391     ;;
1392
1393   # Other configurations, but we have a compiler.  Assume the user knows
1394   # what he's doing.
1395   yes:*:*:yes)
1396     AC_MSG_WARN([trying to bootstrap a cross compiler])
1397     ;;
1398
1399   # No compiler: if they passed --enable-bootstrap explicitly, fail
1400   no:*:*:yes)
1401     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1402
1403   # Fail if wrong command line
1404   *)
1405     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1406     ;;
1407 esac
1408
1409 # When bootstrapping with GCC, build stage 1 in C++11 mode to ensure that a
1410 # C++11 compiler can still start the bootstrap.  Otherwise, if building GCC,
1411 # require C++11 (or higher).
1412 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1413   CXX="$CXX -std=c++11"
1414 elif test "$have_compiler" = yes; then
1415   AX_CXX_COMPILE_STDCXX(11)
1416
1417   if test "${build}" != "${host}"; then
1418     AX_CXX_COMPILE_STDCXX(11, [], [], [_FOR_BUILD])
1419   fi
1420 fi
1421
1422 AC_ARG_ENABLE([pgo-build],
1423 [AS_HELP_STRING([--enable-pgo-build[[=lto]]],
1424                 [enable the PGO build])],
1425 [enable_pgo_build=$enableval],
1426 [enable_pgo_build=no])
1427
1428 # Issue errors and warnings for invalid/strange PGO build combinations.
1429 case "$have_compiler:$host:$target:$enable_pgo_build" in
1430   *:*:*:no) ;;
1431
1432   # Allow the PGO build only if we aren't building a compiler and
1433   # we are in a native configuration.
1434   no:$build:$build:yes | no:$build:$build:lto) ;;
1435
1436   # Disallow the PGO bootstrap if we are building a compiler.
1437   yes:*:*:yes | yes:*:*:lto)
1438     AC_MSG_ERROR([cannot perform the PGO bootstrap when building a compiler]) ;;
1439
1440   *)
1441     AC_MSG_ERROR([invalid option for --enable-pgo-build])
1442     ;;
1443 esac
1444
1445 if test "$enable_pgo_build" != "no"; then
1446   AC_MSG_CHECKING([whether the compiler supports -fprofile-generate])
1447   old_CFLAGS="$CFLAGS"
1448   PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
1449   CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
1450   AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1451                     [PGO_BUILD_GEN_CFLAGS=])
1452   CFLAGS="$old_CFLAGS"
1453   if test -n "$PGO_BUILD_GEN_CFLAGS"; then
1454     AC_MSG_RESULT([yes])
1455     PGO_BUILD_USE_CFLAGS="-fprofile-use"
1456   else
1457     AC_MSG_RESULT([no])
1458     AC_MSG_ERROR([cannot perform the PGO build without -fprofile-generate])
1459   fi
1460
1461   if test "$enable_pgo_build" = "lto"; then
1462     AC_MSG_CHECKING([whether the compiler supports -flto=jobserver -ffat-lto-objects])
1463     old_CFLAGS="$CFLAGS"
1464     PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
1465     CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
1466     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1467                       [PGO_BUILD_LTO_CFLAGS=])
1468     CFLAGS="$old_CFLAGS"
1469     if test -n "$PGO_BUILD_LTO_CFLAGS"; then
1470       AC_MSG_RESULT([yes])
1471     else
1472       AC_MSG_RESULT([no])
1473       AC_MSG_WARN([LTO is disabled for the PGO build])
1474     fi
1475   fi
1476 fi
1477 AC_SUBST(PGO_BUILD_GEN_CFLAGS)
1478 AC_SUBST(PGO_BUILD_USE_CFLAGS)
1479 AC_SUBST(PGO_BUILD_LTO_CFLAGS)
1480
1481 # Used for setting $lt_cv_objdir
1482 _LT_CHECK_OBJDIR
1483
1484 # Check for GMP, MPFR and MPC
1485 require_gmp=no
1486 require_mpc=no
1487 if test -d ${srcdir}/gcc ; then
1488   require_gmp=yes
1489   require_mpc=yes
1490 fi
1491 if test -d ${srcdir}/gdb ; then
1492   if test "x$enable_gdb" != xno; then
1493    require_gmp=yes
1494   fi
1495 fi
1496
1497 gmplibs="-lmpfr -lgmp"
1498 if test x"$require_mpc" = "xyes" ; then
1499   gmplibs="-lmpc $gmplibs"
1500 fi
1501 gmpinc=
1502 have_gmp=no
1503
1504 # Specify a location for mpc
1505 # check for this first so it ends up on the link line before mpfr.
1506 AC_ARG_WITH(mpc,
1507 [AS_HELP_STRING([--with-mpc=PATH],
1508                 [specify prefix directory for installed MPC package.
1509                  Equivalent to --with-mpc-include=PATH/include
1510                  plus --with-mpc-lib=PATH/lib])])
1511 AC_ARG_WITH(mpc-include,
1512 [AS_HELP_STRING([--with-mpc-include=PATH],
1513                 [specify directory for installed MPC include files])])
1514 AC_ARG_WITH(mpc-lib,
1515 [AS_HELP_STRING([--with-mpc-lib=PATH],
1516                 [specify directory for the installed MPC library])])
1517
1518 if test "x$with_mpc" != x; then
1519   gmplibs="-L$with_mpc/lib $gmplibs"
1520   gmpinc="-I$with_mpc/include $gmpinc"
1521 fi
1522 if test "x$with_mpc_include" != x; then
1523   gmpinc="-I$with_mpc_include $gmpinc"
1524 fi
1525 if test "x$with_mpc_lib" != x; then
1526   gmplibs="-L$with_mpc_lib $gmplibs"
1527 fi
1528 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1529   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1530   gmpinc='-I$$s/mpc/src '"$gmpinc"
1531   # Do not test the mpc version.  Assume that it is sufficient, since
1532   # it is in the source tree, and the library has not been built yet
1533   # but it would be included on the link line in the version check below
1534   # hence making the test fail.
1535   have_gmp=yes
1536 fi
1537
1538 # Specify a location for mpfr
1539 # check for this first so it ends up on the link line before gmp.
1540 AC_ARG_WITH(mpfr,
1541 [AS_HELP_STRING([--with-mpfr=PATH],
1542                 [specify prefix directory for installed MPFR package.
1543                  Equivalent to --with-mpfr-include=PATH/include
1544                  plus --with-mpfr-lib=PATH/lib])])
1545 AC_ARG_WITH(mpfr-include,
1546 [AS_HELP_STRING([--with-mpfr-include=PATH],
1547                 [specify directory for installed MPFR include files])])
1548 AC_ARG_WITH(mpfr-lib,
1549 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1550                 [specify directory for the installed MPFR library])])
1551
1552 if test "x$with_mpfr" != x; then
1553   gmplibs="-L$with_mpfr/lib $gmplibs"
1554   gmpinc="-I$with_mpfr/include $gmpinc"
1555 fi
1556 if test "x$with_mpfr_include" != x; then
1557   gmpinc="-I$with_mpfr_include $gmpinc"
1558 fi
1559 if test "x$with_mpfr_lib" != x; then
1560   gmplibs="-L$with_mpfr_lib $gmplibs"
1561 fi
1562 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1563   # MPFR v3.1.0 moved the sources into a src sub-directory.
1564   if ! test -d ${srcdir}/mpfr/src; then
1565     AC_MSG_ERROR([dnl
1566 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1567   fi
1568   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1569   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1570   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1571   # Do not test the mpfr version.  Assume that it is sufficient, since
1572   # it is in the source tree, and the library has not been built yet
1573   # but it would be included on the link line in the version check below
1574   # hence making the test fail.
1575   have_gmp=yes
1576 fi
1577
1578 # Specify a location for gmp
1579 AC_ARG_WITH(gmp,
1580 [AS_HELP_STRING([--with-gmp=PATH],
1581                 [specify prefix directory for the installed GMP package.
1582                  Equivalent to --with-gmp-include=PATH/include
1583                  plus --with-gmp-lib=PATH/lib])])
1584 AC_ARG_WITH(gmp-include,
1585 [AS_HELP_STRING([--with-gmp-include=PATH],
1586                 [specify directory for installed GMP include files])])
1587 AC_ARG_WITH(gmp-lib,
1588 [AS_HELP_STRING([--with-gmp-lib=PATH],
1589                 [specify directory for the installed GMP library])])
1590
1591
1592 if test "x$with_gmp" != x; then
1593   gmplibs="-L$with_gmp/lib $gmplibs"
1594   gmpinc="-I$with_gmp/include $gmpinc"
1595 fi
1596 if test "x$with_gmp_include" != x; then
1597   gmpinc="-I$with_gmp_include $gmpinc"
1598 fi
1599 if test "x$with_gmp_lib" != x; then
1600   gmplibs="-L$with_gmp_lib $gmplibs"
1601 fi
1602 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1603   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1604   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1605   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1606   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1607   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1608   # Do not test the gmp version.  Assume that it is sufficient, since
1609   # it is in the source tree, and the library has not been built yet
1610   # but it would be included on the link line in the version check below
1611   # hence making the test fail.
1612   have_gmp=yes
1613 fi
1614
1615 if test "x$require_gmp" = xyes && test "x$have_gmp" = xno; then
1616   have_gmp=yes
1617   saved_CFLAGS="$CFLAGS"
1618   CFLAGS="$CFLAGS $gmpinc"
1619   # Check for the recommended and required versions of GMP.
1620   AC_MSG_CHECKING([for the correct version of gmp.h])
1621   AC_TRY_COMPILE([#include "gmp.h"],[
1622   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1623   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1624   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1625   choke me
1626   #endif
1627   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1628   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1629   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1630   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1631   choke me
1632   #endif
1633   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1634    [AC_MSG_RESULT([no]); have_gmp=no])
1635
1636   # If we have GMP, check the MPFR version.
1637   if test x"$have_gmp" = xyes; then
1638     # Check for the recommended and required versions of MPFR.
1639     AC_MSG_CHECKING([for the correct version of mpfr.h])
1640     AC_TRY_COMPILE([#include <gmp.h>
1641     #include <mpfr.h>],[
1642     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,0)
1643     choke me
1644     #endif
1645     ], [AC_TRY_COMPILE([#include <gmp.h>
1646     #include <mpfr.h>],[
1647     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,6)
1648     choke me
1649     #endif
1650     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1651      [AC_MSG_RESULT([no]); have_gmp=no])
1652   fi
1653
1654   # Check for the MPC header version.
1655   if test "x$require_mpc" = xyes && test x"$have_gmp" = xyes ; then
1656     # Check for the recommended and required versions of MPC.
1657     AC_MSG_CHECKING([for the correct version of mpc.h])
1658     AC_TRY_COMPILE([#include <mpc.h>],[
1659     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1660     choke me
1661     #endif
1662     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1663     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1664     choke me
1665     #endif
1666     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1667      [AC_MSG_RESULT([no]); have_gmp=no])
1668   fi
1669
1670   # Now check the MPFR library.
1671   if test x"$have_gmp" = xyes; then
1672     saved_LIBS="$LIBS"
1673     LIBS="$LIBS $gmplibs"
1674     AC_MSG_CHECKING([for the correct version of the gmp/mpfr libraries])
1675     AC_TRY_LINK([#include <mpfr.h>],[
1676     mpfr_t n;
1677     mpfr_t x;
1678     int t;
1679     mpfr_init (n);
1680     mpfr_init (x);
1681     mpfr_atan2 (n, n, x, MPFR_RNDN);
1682     mpfr_erfc (n, x, MPFR_RNDN);
1683     mpfr_subnormalize (x, t, MPFR_RNDN);
1684     mpfr_clear(n);
1685     mpfr_clear(x);
1686     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1687     LIBS="$saved_LIBS"
1688   fi
1689
1690   # Now check the MPC library
1691   if test "x$require_mpc" = xyes && test x"$have_gmp" = xyes; then
1692     saved_LIBS="$LIBS"
1693     LIBS="$LIBS $gmplibs"
1694     AC_MSG_CHECKING([for the correct version of the mpc libraries])
1695     AC_TRY_LINK([#include <mpc.h>],[
1696     mpc_t c;
1697     mpc_init2 (c, 53);
1698     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1699     mpc_cosh (c, c, MPC_RNDNN);
1700     mpc_pow (c, c, c, MPC_RNDNN);
1701     mpc_acosh (c, c, MPC_RNDNN);
1702     mpc_clear (c);
1703     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1704     LIBS="$saved_LIBS"
1705   fi
1706
1707   CFLAGS="$saved_CFLAGS"
1708
1709 # The library versions listed in the error message below should match
1710 # the HARD-minimums enforced above.
1711   if test x$have_gmp != xyes; then
1712     if test -d ${srcdir}/gcc ; then
1713       AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 3.1.0+ and MPC 0.8.0+.
1714 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1715 their locations.  Source code for these libraries can be found at
1716 their respective hosting sites as well as at
1717 https://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1718 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1719 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1720 make sure that you have installed both the libraries and the header
1721 files.  They may be located in separate packages.])
1722     else
1723       AC_MSG_ERROR([Building GDB requires GMP 4.2+, and MPFR 3.1.0+.
1724 Try the --with-gmp and/or --with-mpfr options to specify
1725 their locations.  If you obtained GMP and/or MPFR from a vendor
1726 distribution package, make sure that you have installed both the libraries
1727 and the header files.  They may be located in separate packages.])
1728     fi
1729   fi
1730 fi
1731
1732 # Flags needed for both GMP, MPFR and/or MPC.
1733 AC_SUBST(gmplibs)
1734 AC_SUBST(gmpinc)
1735 AC_SUBST(extra_mpfr_configure_flags)
1736 AC_SUBST(extra_mpc_gmp_configure_flags)
1737 AC_SUBST(extra_mpc_mpfr_configure_flags)
1738 AC_SUBST(extra_isl_gmp_configure_flags)
1739
1740 # Libraries to use for stage1 or when not bootstrapping.
1741 AC_ARG_WITH(stage1-libs,
1742 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1743 [if test "$withval" = "no" -o "$withval" = "yes"; then
1744    stage1_libs=
1745  else
1746    stage1_libs=$withval
1747  fi],
1748 [stage1_libs=])
1749 AC_SUBST(stage1_libs)
1750
1751 # Whether or not to use -static-libstdc++ and -static-libgcc.  The
1752 # default is yes if gcc is being built; no otherwise.  The reason for
1753 # this default is that gdb is sometimes linked against GNU Source
1754 # Highlight, which is a shared library that uses C++ exceptions.  In
1755 # this case, -static-libstdc++ will cause crashes.
1756 AC_ARG_WITH(static-standard-libraries,
1757 [AS_HELP_STRING([--with-static-standard-libraries],
1758                 [use -static-libstdc++ and -static-libgcc (default=auto)])],
1759 [], [with_static_standard_libraries=auto])
1760 if test "$with_static_standard_libraries" = auto; then
1761   with_static_standard_libraries=$have_compiler
1762 fi
1763
1764 # Linker flags to use for stage1 or when not bootstrapping.
1765 AC_ARG_WITH(stage1-ldflags,
1766 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1767 [if test "$withval" = "no" -o "$withval" = "yes"; then
1768    stage1_ldflags=
1769  else
1770    stage1_ldflags=$withval
1771  fi],
1772 [stage1_ldflags=
1773  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1774  # if supported.  But if the user explicitly specified the libraries to use,
1775  # trust that they are doing what they want.
1776  if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
1777      -a "$have_static_libs" = yes; then
1778    stage1_ldflags="-static-libstdc++ -static-libgcc"
1779  fi])
1780 AC_SUBST(stage1_ldflags)
1781
1782 # Libraries to use for stage2 and later builds.
1783 AC_ARG_WITH(boot-libs,
1784 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1785 [if test "$withval" = "no" -o "$withval" = "yes"; then
1786    poststage1_libs=
1787  else
1788    poststage1_libs=$withval
1789  fi],
1790 [poststage1_libs=])
1791 AC_SUBST(poststage1_libs)
1792
1793 # Linker flags to use for stage2 and later builds.
1794 AC_ARG_WITH(boot-ldflags,
1795 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1796                 [linker flags for stage2 and later])],
1797 [if test "$withval" = "no" -o "$withval" = "yes"; then
1798    poststage1_ldflags=
1799  else
1800    poststage1_ldflags=$withval
1801  fi],
1802 [poststage1_ldflags=
1803  # In stages 2 and 3, default to linking libstdc++ and libgcc
1804  # statically.  But if the user explicitly specified the libraries to
1805  # use, trust that they are doing what they want.
1806  if test "$poststage1_libs" = ""; then
1807    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1808  fi])
1809 AC_SUBST(poststage1_ldflags)
1810
1811 # GCC GRAPHITE dependency isl.
1812 # Basic setup is inlined here, actual checks are in config/isl.m4
1813
1814 AC_ARG_WITH(isl,
1815   [AS_HELP_STRING(
1816    [--with-isl=PATH],
1817    [Specify prefix directory for the installed isl package.
1818     Equivalent to --with-isl-include=PATH/include
1819     plus --with-isl-lib=PATH/lib])])
1820
1821 # Treat --without-isl as a request to disable
1822 # GRAPHITE support and skip all following checks.
1823 if test "x$with_isl" != "xno"; then
1824   # Check for isl
1825   dnl Provide configure switches and initialize islinc & isllibs
1826   dnl with user input.
1827   ISL_INIT_FLAGS
1828   dnl The versions of isl that work for Graphite
1829   ISL_CHECK_VERSION()
1830   dnl Only execute fail-action, if isl has been requested.
1831   ISL_IF_FAILED([
1832     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1833 fi
1834
1835 # If the isl check failed, disable builds of in-tree variant of isl
1836 if test "x$with_isl" = xno ||
1837    test "x$gcc_cv_isl" = xno; then
1838   noconfigdirs="$noconfigdirs isl"
1839   islinc=
1840 fi
1841
1842 AC_SUBST(isllibs)
1843 AC_SUBST(islinc)
1844
1845 # Check for LTO support.
1846 AC_ARG_ENABLE(lto,
1847 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1848 enable_lto=$enableval,
1849 enable_lto=yes; default_enable_lto=yes)
1850
1851 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1852   build_lto_plugin=yes
1853 ],[if test x"$default_enable_lto" = x"yes" ; then
1854     case $target in
1855       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1856       # On other non-ELF platforms, LTO has yet to be validated.
1857       *) enable_lto=no ;;
1858     esac
1859   else
1860   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1861   # It would also be nice to check the binutils support, but we don't
1862   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1863   # warn during gcc/ subconfigure; unless you're bootstrapping with
1864   # -flto it won't be needed until after installation anyway.
1865     case $target in
1866       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1867       *) if test x"$enable_lto" = x"yes"; then
1868         AC_MSG_ERROR([LTO support is not enabled for this target.])
1869         fi
1870       ;;
1871     esac
1872   fi
1873   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1874   # Build it unless LTO was explicitly disabled.
1875   case $target in
1876     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1877     *) ;;
1878   esac
1879 ])
1880
1881 AC_ARG_ENABLE(linker-plugin-configure-flags,
1882   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1883     [additional flags for configuring linker plugins @<:@none@:>@])],
1884   extra_linker_plugin_configure_flags=$enableval,
1885   extra_linker_plugin_configure_flags=)
1886 AC_SUBST(extra_linker_plugin_configure_flags)
1887 AC_ARG_ENABLE(linker-plugin-flags,
1888   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1889     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1890   extra_linker_plugin_flags=$enableval,
1891   extra_linker_plugin_flags=)
1892 AC_SUBST(extra_linker_plugin_flags)
1893
1894 # Handle --enable-host-pie
1895 # If host PIE executables are the default (or must be forced on) for some host,
1896 # we must pass that configuration to the gcc directory.
1897 gcc_host_pie=
1898 AC_ARG_ENABLE(host-pie,
1899 [AS_HELP_STRING([--enable-host-pie],
1900                 [build position independent host executables])],
1901 [host_pie=$enableval
1902  case $host in
1903    *-*-darwin2*)
1904      if test x$host_pie != xyes ; then
1905        # for Darwin20+ this is required.
1906        AC_MSG_WARN([PIE executables are required for the configured host, host-pie setting ignored.])
1907        host_pie=yes
1908        gcc_host_pie=--enable-host-pie
1909      fi ;;
1910   *) ;;
1911  esac],
1912 [case $host in
1913   *-*-darwin2*)
1914     # Default to PIE (mandatory for aarch64).
1915     host_pie=yes
1916     gcc_host_pie=--enable-host-pie
1917     ;;
1918   *) host_pie=no ;;
1919  esac])
1920
1921 AC_SUBST(host_pie)
1922 AC_SUBST(gcc_host_pie)
1923
1924 # Enable --enable-host-shared.
1925 # Checked early to determine whether jit is an 'all' language
1926 AC_ARG_ENABLE(host-shared,
1927 [AS_HELP_STRING([--enable-host-shared],
1928                 [build host code as shared libraries])],
1929 [host_shared=$enableval
1930  case $host in
1931    x86_64-*-darwin* | aarch64-*-darwin*)
1932      if test x$host_shared != xyes ; then
1933        # PIC is the default, and actually cannot be switched off.
1934        AC_MSG_WARN([PIC code is required for the configured host; host-shared setting ignored.])
1935        host_shared=yes
1936      fi ;;
1937    *-*-darwin*)
1938      if test x$host_pie = xyes -a x$host_shared != xyes ; then
1939        AC_MSG_WARN([PIC code is required for PIE host executables host-shared setting ignored.])
1940        host_shared=yes
1941      fi ;;
1942   *) ;;
1943  esac],
1944 [case $host in
1945   # 64B x86_64 and Aarch64 Darwin default to PIC.
1946   x86_64-*-darwin* | aarch64-*-darwin*) host_shared=yes ;;
1947   # 32B and powerpc64 Darwin must use PIC to link PIE exes.
1948   *-*-darwin*) host_shared=$host_pie ;;
1949   *) host_shared=no;;
1950  esac])
1951
1952 AC_SUBST(host_shared)
1953
1954 if test x$host_shared = xyes; then
1955   case $host in
1956     *-*-darwin*)
1957       # Since host shared is the default for 64b Darwin, and also enabled for
1958       # host_pie, ensure that we present the PIE flag when host_pie is active.
1959       if test x$host_pie = xyes; then
1960         PICFLAG=-fPIE
1961       fi
1962       ;;
1963     *)
1964       PICFLAG=-fPIC
1965       ;;
1966   esac
1967 elif test x$host_pie = xyes; then
1968   PICFLAG=-fPIE
1969 else
1970   PICFLAG=
1971 fi
1972
1973 AC_SUBST(PICFLAG)
1974
1975 # If we are building PIC/PIE host executables, and we are building dependent
1976 # libs (e.g. GMP) in-tree those libs need to be configured to generate PIC
1977 # code.
1978 host_libs_picflag=
1979 if test "$host_shared" = "yes" -o "$host_pie" = "yes"; then
1980 host_libs_picflag='--with-pic'
1981 fi
1982 AC_SUBST(host_libs_picflag)
1983
1984 # By default, C and C++ are the only stage 1 languages.
1985 stage1_languages=,c,
1986
1987 # Target libraries that we bootstrap.
1988 bootstrap_target_libs=,target-libgcc,
1989
1990 # Figure out what language subdirectories are present.
1991 # Look if the user specified --enable-languages="..."; if not, use
1992 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1993 # go away some day.
1994 # NB:  embedded tabs in this IF block -- do not untabify
1995 if test -d ${srcdir}/gcc; then
1996   if test x"${enable_languages+set}" != xset; then
1997     if test x"${LANGUAGES+set}" = xset; then
1998       enable_languages="${LANGUAGES}"
1999         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
2000     else
2001       enable_languages=default
2002     fi
2003   else
2004     if test x"${enable_languages}" = x ||
2005        test x"${enable_languages}" = xyes;
2006        then
2007       echo configure.ac: --enable-languages needs at least one language argument 1>&2
2008       exit 1
2009     fi
2010   fi
2011   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
2012
2013   # 'f95' is the old name for the 'fortran' language. We issue a warning
2014   # and make the substitution.
2015   case ,${enable_languages}, in
2016     *,f95,*)
2017       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
2018       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
2019       ;;
2020   esac
2021
2022   # If bootstrapping, C++ must be enabled.
2023   case ",$enable_languages,:$enable_bootstrap" in
2024     *,c++,*:*) ;;
2025     *:yes)
2026       if test -f ${srcdir}/gcc/cp/config-lang.in; then
2027         enable_languages="${enable_languages},c++"
2028       else
2029         AC_MSG_ERROR([bootstrapping requires c++ sources])
2030       fi
2031       ;;
2032   esac
2033
2034   # First scan to see if an enabled language requires some other language.
2035   # We assume that a given config-lang.in will list all the language
2036   # front ends it requires, even if some are required indirectly.
2037   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2038     case ${lang_frag} in
2039       ..) ;;
2040       # The odd quoting in the next line works around
2041       # an apparent bug in bash 1.12 on linux.
2042       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2043       *)
2044         # From the config-lang.in, get $language, $lang_requires, and
2045         # $lang_requires_boot_languages.
2046         language=
2047         lang_requires=
2048         lang_requires_boot_languages=
2049         # set srcdir during sourcing lang_frag to the gcc dir.
2050         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
2051         # polutes this shell
2052         saved_srcdir=${srcdir}
2053         srcdir=${srcdir}/gcc . ${lang_frag}
2054         srcdir=${saved_srcdir}
2055         for other in ${lang_requires} ${lang_requires_boot_languages}; do
2056           case ,${enable_languages}, in
2057             *,$other,*) ;;
2058             *,default,*) ;;
2059             *,all,*) ;;
2060             *,$language,*)
2061               echo " \`$other' language required by \`$language'; enabling" 1>&2
2062               enable_languages="${enable_languages},${other}"
2063               ;;
2064           esac
2065         done
2066         for other in ${lang_requires_boot_languages} ; do
2067           if test "$other" != "c"; then
2068             case ,${enable_stage1_languages}, in
2069               *,$other,*) ;;
2070               *,default,*) ;;
2071               *,all,*) ;;
2072               *)
2073                 case ,${enable_languages}, in
2074                   *,$language,*)
2075                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
2076                     enable_stage1_languages="$enable_stage1_languages,${other}"
2077                     ;;
2078                 esac
2079                 ;;
2080             esac
2081           fi
2082         done
2083         ;;
2084     esac
2085   done
2086
2087   new_enable_languages=,c,
2088
2089   # If LTO is enabled, add the LTO front end.
2090   if test "$enable_lto" = "yes" ; then
2091     case ,${enable_languages}, in
2092       *,lto,*) ;;
2093       *) enable_languages="${enable_languages},lto" ;;
2094     esac
2095     if test "${build_lto_plugin}" = "yes" ; then
2096       configdirs="$configdirs lto-plugin"
2097     fi
2098   fi
2099
2100   # If we're building an offloading compiler, add the LTO front end.
2101   if test x"$enable_as_accelerator_for" != x ; then
2102     case ,${enable_languages}, in
2103       *,lto,*) ;;
2104       *) enable_languages="${enable_languages},lto" ;;
2105     esac
2106   fi
2107
2108   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
2109   potential_languages=,c,
2110
2111   enabled_target_libs=
2112   disabled_target_libs=
2113
2114   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2115     case ${lang_frag} in
2116       ..) ;;
2117       # The odd quoting in the next line works around
2118       # an apparent bug in bash 1.12 on linux.
2119       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2120       *)
2121         # From the config-lang.in, get $language, $target_libs,
2122         # $lang_dirs, $boot_language, and $build_by_default
2123         language=
2124         target_libs=
2125         lang_dirs=
2126         subdir_requires=
2127         boot_language=no
2128         build_by_default=yes
2129         # set srcdir during sourcing.  See above about save & restore
2130         saved_srcdir=${srcdir}
2131         srcdir=${srcdir}/gcc . ${lang_frag}
2132         srcdir=${saved_srcdir}
2133         if test x${language} = x; then
2134           echo "${lang_frag} doesn't set \$language." 1>&2
2135           exit 1
2136         fi
2137
2138         if test "$language" = "c++"; then
2139           boot_language=yes
2140         fi
2141
2142         add_this_lang=no
2143         # C is always enabled, so no need to add it again
2144         if test "$language" != "c"; then
2145           case ,${enable_languages}, in
2146             *,${language},*)
2147               # Language was explicitly selected; include it
2148               add_this_lang=yes
2149               ;;
2150             *,all,*)
2151               # All languages are enabled
2152               add_this_lang=all
2153               ;;
2154             *,default,*)
2155               # 'default' was selected, select it if it is a default language
2156               add_this_lang=${build_by_default}
2157               ;;
2158           esac
2159         fi
2160
2161         # Disable languages that need other directories if these aren't available.
2162         for i in $subdir_requires; do
2163           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2164           case ${add_this_lang} in
2165             yes)
2166               # Specifically requested language; tell them.
2167               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2168               ;;
2169             all)
2170               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2171               add_this_lang=unsupported
2172               ;;
2173             *)
2174               # Silently disable.
2175               add_this_lang=unsupported
2176               ;;
2177           esac
2178         done
2179
2180         # Disable Ada if no preexisting GNAT is available.
2181         case ${add_this_lang}:${language}:${have_gnat} in
2182           yes:ada:no)
2183             # Specifically requested language; tell them.
2184             AC_MSG_ERROR([GNAT is required to build $language])
2185             ;;
2186           all:ada:no)
2187             AC_MSG_WARN([GNAT is required to build $language])
2188             add_this_lang=unsupported
2189             ;;
2190           *:ada:no)
2191             # Silently disable.
2192             add_this_lang=unsupported
2193             ;;
2194         esac
2195
2196         # Disable D if no preexisting GDC is available.
2197         case ${add_this_lang}:${language}:${have_gdc} in
2198           yes:d:no)
2199             # Specifically requested language; tell them.
2200             AC_MSG_ERROR([GDC is required to build $language])
2201            ;;
2202           all:d:no)
2203             AC_MSG_WARN([GDC is required to build $language])
2204             add_this_lang=unsupported
2205             ;;
2206           *:d:no)
2207             # Silently disable.
2208             add_this_lang=unsupported
2209             ;;
2210         esac
2211
2212         # Disable jit if -enable-host-shared not specified
2213         # but not if building for Mingw. All code in Windows
2214         # is position independent code (PIC).
2215         case $target in
2216           *mingw*) ;;
2217           *)
2218           case ${add_this_lang}:${language}:${host_shared} in
2219             yes:jit:no)
2220                    # PR jit/64780: explicitly specify --enable-host-shared
2221             AC_MSG_ERROR([
2222 Enabling language "jit" requires --enable-host-shared.
2223
2224 --enable-host-shared typically slows the rest of the compiler down by
2225 a few %, so you must explicitly enable it.
2226
2227 If you want to build both the jit and the regular compiler, it is often
2228 best to do this via two separate configure/builds, in separate
2229 directories, to avoid imposing the performance cost of
2230 --enable-host-shared on the regular compiler.])
2231                     ;;
2232             all:jit:no)
2233               AC_MSG_WARN([--enable-host-shared required to build $language])
2234               add_this_lang=unsupported
2235               ;;
2236             *:jit:no)
2237               # Silently disable.
2238               add_this_lang=unsupported
2239               ;;
2240                 esac
2241           ;;
2242         esac
2243
2244         # Disable a language that is unsupported by the target.
2245         case "${add_this_lang}: $unsupported_languages " in
2246           no:*) ;;
2247           unsupported:*) ;;
2248           *:*" $language "*)
2249             AC_MSG_WARN([${language} not supported for this target])
2250             add_this_lang=unsupported
2251             ;;
2252         esac
2253
2254         case $add_this_lang in
2255           unsupported)
2256             # Remove language-dependent dirs.
2257             disabled_target_libs="$disabled_target_libs $target_libs"
2258             noconfigdirs="$noconfigdirs $lang_dirs"
2259             ;;
2260           no)
2261             # Remove language-dependent dirs; still show language as supported.
2262             disabled_target_libs="$disabled_target_libs $target_libs"
2263             noconfigdirs="$noconfigdirs $lang_dirs"
2264             potential_languages="${potential_languages}${language},"
2265             ;;
2266           all|yes)
2267             new_enable_languages="${new_enable_languages}${language},"
2268             potential_languages="${potential_languages}${language},"
2269             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2270             enabled_target_libs="$enabled_target_libs $target_libs"
2271             case "${boot_language}:,$enable_stage1_languages," in
2272               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2273                 # Add to (comma-separated) list of stage 1 languages.
2274                 case ",$stage1_languages," in
2275                   *,$language,* | ,yes, | ,all,) ;;
2276                   *) stage1_languages="${stage1_languages}${language}," ;;
2277                 esac
2278                 # We need to bootstrap any supporting libraries.
2279                 bootstrap_target_libs=`echo "${bootstrap_target_libs}${target_libs}," | sed "s/ /,/g"`
2280                 ;;
2281             esac
2282             ;;
2283         esac
2284         ;;
2285     esac
2286   done
2287
2288   # Add target libraries which are only needed for disabled languages
2289   # to noconfigdirs.
2290   if test -n "$disabled_target_libs"; then
2291     for dir in $disabled_target_libs; do
2292       case " $enabled_target_libs " in
2293       *" ${dir} "*) ;;
2294       *) noconfigdirs="$noconfigdirs $dir" ;;
2295       esac
2296     done
2297   fi
2298
2299   AC_ARG_ENABLE(stage1-languages,
2300   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2301                   [choose additional languages to build during
2302                   stage1.  Mostly useful for compiler development])],
2303   [case ,${enable_stage1_languages}, in
2304     ,no,|,,)
2305       # Set it to something that will have no effect in the loop below
2306       enable_stage1_languages=c ;;
2307     ,yes,)
2308       enable_stage1_languages=`echo $new_enable_languages | \
2309         sed -e "s/^,//" -e "s/,$//" ` ;;
2310     *,all,*)
2311       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2312         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2313   esac
2314
2315   # Add "good" languages from enable_stage1_languages to stage1_languages,
2316   # while "bad" languages go in missing_languages.  Leave no duplicates.
2317   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2318     case $potential_languages in
2319       *,$i,*)
2320         case $stage1_languages in
2321           *,$i,*) ;;
2322           *) stage1_languages="$stage1_languages$i," ;;
2323         esac ;;
2324       *)
2325         case $missing_languages in
2326           *,$i,*) ;;
2327           *) missing_languages="$missing_languages$i," ;;
2328         esac ;;
2329      esac
2330   done])
2331
2332   # Remove leading/trailing commas that were added for simplicity
2333   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2334   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2335   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2336   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2337
2338   if test "x$missing_languages" != x; then
2339     AC_MSG_ERROR([
2340 The following requested languages could not be built: ${missing_languages}
2341 Supported languages are: ${potential_languages}])
2342   fi
2343   if test "x$new_enable_languages" != "x$enable_languages"; then
2344     echo The following languages will be built: ${new_enable_languages}
2345     enable_languages="$new_enable_languages"
2346   fi
2347
2348   AC_SUBST(stage1_languages)
2349   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2350 fi
2351
2352 # Handle --disable-<component> generically.
2353 for dir in $configdirs $build_configdirs $target_configdirs ; do
2354   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2355   varname=`echo $dirname | sed -e s/+/_/g`
2356   if eval test x\${enable_${varname}} "=" xno ; then
2357     noconfigdirs="$noconfigdirs $dir"
2358   fi
2359 done
2360
2361 # Check for Boehm's garbage collector
2362 AC_ARG_ENABLE(objc-gc,
2363 [AS_HELP_STRING([--enable-objc-gc],
2364                 [enable use of Boehm's garbage collector with the
2365                  GNU Objective-C runtime])])
2366 AC_ARG_WITH([target-bdw-gc],
2367 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2368                 [specify prefix directory for installed bdw-gc package.
2369                  Equivalent to --with-target-bdw-gc-include=PATH/include
2370                  plus --with-target-bdw-gc-lib=PATH/lib])])
2371 AC_ARG_WITH([target-bdw-gc-include],
2372 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2373                 [specify directories for installed bdw-gc include files])])
2374 AC_ARG_WITH([target-bdw-gc-lib],
2375 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2376                 [specify directories for installed bdw-gc library])])
2377
2378 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2379   AC_MSG_CHECKING([for bdw garbage collector])
2380   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2381     dnl no bdw-gw options, assume default locations
2382     AC_MSG_RESULT([using bdw-gc in default locations])
2383   else
2384     dnl bdw-gw options, first error checking, complete checking in libobjc
2385     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2386       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2387     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2388       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2389     else
2390       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2391     fi
2392   fi
2393 esac
2394
2395 # Disable libitm, libsanitizer, libvtv if we're not building C++
2396 case ,${enable_languages}, in
2397   *,c++,*)
2398     # Disable libitm, libsanitizer if we're not building libstdc++
2399     case "${noconfigdirs}" in
2400       *target-libstdc++-v3*)
2401         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2402         ;;
2403       *) ;;
2404     esac
2405     ;;
2406   *)
2407     noconfigdirs="$noconfigdirs target-libitm target-libsanitizer target-libvtv"
2408     ;;
2409 esac
2410
2411 # If gcc/ is not in the source tree then we'll not be building a
2412 # target compiler, assume in that case we don't want to build any
2413 # target libraries or tools.
2414 #
2415 # This was added primarily for the benefit for binutils-gdb who reuse
2416 # this configure script, but don't always have target tools available.
2417 if test ! -d ${srcdir}/gcc; then
2418    skipdirs="${skipdirs} ${target_configdirs}"
2419 fi
2420
2421 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2422 # $build_configdirs and $target_configdirs.
2423 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2424
2425 notsupp=""
2426 for dir in . $skipdirs $noconfigdirs ; do
2427   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2428   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2429     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2430     if test -r $srcdir/$dirname/configure ; then
2431       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2432         true
2433       else
2434         notsupp="$notsupp $dir"
2435       fi
2436     fi
2437   fi
2438   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2439     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2440     if test -r $srcdir/$dirname/configure ; then
2441       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2442         true
2443       else
2444         notsupp="$notsupp $dir"
2445       fi
2446     fi
2447   fi
2448   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2449     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2450     if test -r $srcdir/$dirname/configure ; then
2451       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2452         true
2453       else
2454         notsupp="$notsupp $dir"
2455       fi
2456     fi
2457   fi
2458 done
2459
2460 # Quietly strip out all directories which aren't configurable in this tree.
2461 # This relies on all configurable subdirectories being autoconfiscated, which
2462 # is now the case.
2463 build_configdirs_all="$build_configdirs"
2464 build_configdirs=
2465 for i in ${build_configdirs_all} ; do
2466   j=`echo $i | sed -e s/build-//g`
2467   if test -f ${srcdir}/$j/configure ; then
2468     build_configdirs="${build_configdirs} $i"
2469   fi
2470 done
2471
2472 configdirs_all="$configdirs"
2473 configdirs=
2474 for i in ${configdirs_all} ; do
2475   if test -f ${srcdir}/$i/configure ; then
2476     configdirs="${configdirs} $i"
2477   fi
2478 done
2479
2480 target_configdirs_all="$target_configdirs"
2481 target_configdirs=
2482 for i in ${target_configdirs_all} ; do
2483   j=`echo $i | sed -e s/target-//g`
2484   if test -f ${srcdir}/$j/configure ; then
2485     target_configdirs="${target_configdirs} $i"
2486   fi
2487 done
2488
2489 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2490 # so we have to add it after the preceding checks.
2491 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2492 then
2493   case " $configdirs " in
2494     *" libiberty "*)
2495       # If we can build libiberty, we can also build libiberty-linker-plugin.
2496       configdirs="$configdirs libiberty-linker-plugin"
2497       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2498         --with-libiberty=../libiberty-linker-plugin";;
2499     *)
2500       AC_MSG_ERROR([libiberty missing]);;
2501   esac
2502 fi
2503
2504 # Sometimes we have special requirements for the host libiberty.
2505 extra_host_libiberty_configure_flags=
2506 case " $configdirs " in
2507   *" lto-plugin "* | *" libcc1 "* | *" gdbserver "*)
2508     # When these are to be built as shared libraries, the same applies to
2509     # libiberty.
2510     extra_host_libiberty_configure_flags=--enable-shared
2511     ;;
2512 esac
2513 AC_SUBST(extra_host_libiberty_configure_flags)
2514
2515 # Sometimes we have special requirements for the host zlib.
2516 extra_host_zlib_configure_flags=
2517 case " $configdirs " in
2518   *" bfd "*)
2519     # When bfd is to be built as a shared library, the same applies to
2520     # zlib.
2521     if test "$enable_shared" = "yes"; then
2522       extra_host_zlib_configure_flags=--enable-host-shared
2523     fi
2524     ;;
2525 esac
2526 AC_SUBST(extra_host_zlib_configure_flags)
2527
2528 # Produce a warning message for the subdirs we can't configure.
2529 # This isn't especially interesting in the Cygnus tree, but in the individual
2530 # FSF releases, it's important to let people know when their machine isn't
2531 # supported by the one or two programs in a package.
2532
2533 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2534   # If $appdirs is non-empty, at least one of those directories must still
2535   # be configured, or we error out.  (E.g., if the gas release supports a
2536   # specified target in some subdirs but not the gas subdir, we shouldn't
2537   # pretend that all is well.)
2538   if test -n "$appdirs" ; then
2539     for dir in $appdirs ; do
2540       if test -r $dir/Makefile.in ; then
2541         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2542           appdirs=""
2543           break
2544         fi
2545         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2546           appdirs=""
2547           break
2548         fi
2549       fi
2550     done
2551     if test -n "$appdirs" ; then
2552       echo "*** This configuration is not supported by this package." 1>&2
2553       exit 1
2554     fi
2555   fi
2556   # Okay, some application will build, or we don't care to check.  Still
2557   # notify of subdirs not getting built.
2558   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2559   echo "    ${notsupp}" 1>&2
2560   echo "    (Any other directories should still work fine.)" 1>&2
2561 fi
2562
2563 case "$host" in
2564   *msdosdjgpp*)
2565     enable_gdbtk=no ;;
2566 esac
2567
2568 # To find our prefix, in gcc_cv_tool_prefix.
2569 ACX_TOOL_DIRS
2570
2571 copy_dirs=
2572
2573 AC_ARG_WITH([build-sysroot],
2574   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2575                   [use sysroot as the system root during the build])],
2576   [if test x"$withval" != x ; then
2577      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2578    fi],
2579   [SYSROOT_CFLAGS_FOR_TARGET=])
2580 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2581
2582 AC_ARG_WITH([debug-prefix-map],
2583   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2584                   [map A to B, C to D ... in debug information])],
2585   [if test x"$withval" != x; then
2586      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2587      for debug_map in $withval; do
2588        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2589      done
2590    fi],
2591   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2592 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2593
2594 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2595 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2596 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2597 # We want to ensure that TARGET libraries (which we know are built with
2598 # gcc) are built with "-O2 -g", so include those options when setting
2599 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2600 if test "x$CFLAGS_FOR_TARGET" = x; then
2601   if test "x${is_cross_compiler}" = xyes; then
2602     CFLAGS_FOR_TARGET="-g -O2"
2603   else
2604     CFLAGS_FOR_TARGET=$CFLAGS
2605     case " $CFLAGS " in
2606       *" -O2 "*) ;;
2607       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2608     esac
2609     case " $CFLAGS " in
2610       *" -g "* | *" -g3 "*) ;;
2611       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2612     esac
2613   fi
2614 fi
2615 AC_SUBST(CFLAGS_FOR_TARGET)
2616
2617 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2618   if test "x${is_cross_compiler}" = xyes; then
2619     CXXFLAGS_FOR_TARGET="-g -O2"
2620   else
2621     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2622     case " $CXXFLAGS " in
2623       *" -O2 "*) ;;
2624       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2625     esac
2626     case " $CXXFLAGS " in
2627       *" -g "* | *" -g3 "*) ;;
2628       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2629     esac
2630   fi
2631 fi
2632 AC_SUBST(CXXFLAGS_FOR_TARGET)
2633
2634 AC_SUBST(LDFLAGS_FOR_TARGET)
2635
2636 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2637 # the named directory are copied to $(tooldir)/sys-include.
2638 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2639   if test x${is_cross_compiler} = xno ; then
2640     echo 1>&2 '***' --with-headers is only supported when cross compiling
2641     exit 1
2642   fi
2643   if test x"${with_headers}" != xyes ; then
2644     x=${gcc_cv_tool_prefix}
2645     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2646   fi
2647 fi
2648
2649 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2650 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2651 # are permitted.
2652 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2653   if test x${is_cross_compiler} = xno ; then
2654     echo 1>&2 '***' --with-libs is only supported when cross compiling
2655     exit 1
2656   fi
2657   if test x"${with_libs}" != xyes ; then
2658     # Copy the libraries in reverse order, so that files in the first named
2659     # library override files in subsequent libraries.
2660     x=${gcc_cv_tool_prefix}
2661     for l in ${with_libs}; do
2662       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2663     done
2664   fi
2665 fi
2666
2667 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2668 #
2669 # This is done by determining whether or not the appropriate directory
2670 # is available, and by checking whether or not specific configurations
2671 # have requested that this magic not happen.
2672 #
2673 # The command line options always override the explicit settings in
2674 # configure.ac, and the settings in configure.ac override this magic.
2675 #
2676 # If the default for a toolchain is to use GNU as and ld, and you don't
2677 # want to do that, then you should use the --without-gnu-as and
2678 # --without-gnu-ld options for the configure script.  Similarly, if
2679 # the default is to use the included zlib and you don't want to do that,
2680 # you should use the --with-system-zlib option for the configure script.
2681
2682 if test x${use_gnu_as} = x &&
2683    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2684   with_gnu_as=yes
2685   extra_host_args="$extra_host_args --with-gnu-as"
2686 fi
2687
2688 if test x${use_gnu_ld} = x &&
2689    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2690   with_gnu_ld=yes
2691   extra_host_args="$extra_host_args --with-gnu-ld"
2692 fi
2693
2694 if test x${use_included_zlib} = x &&
2695    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2696   :
2697 else
2698   with_system_zlib=yes
2699   extra_host_args="$extra_host_args --with-system-zlib"
2700 fi
2701
2702 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2703 # can detect this case.
2704
2705 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2706   with_newlib=yes
2707   extra_host_args="$extra_host_args --with-newlib"
2708 fi
2709
2710 # Handle ${copy_dirs}
2711 set fnord ${copy_dirs}
2712 shift
2713 while test $# != 0 ; do
2714   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2715     :
2716   else
2717     echo Copying $1 to $2
2718
2719     # Use the install script to create the directory and all required
2720     # parent directories.
2721     if test -d $2 ; then
2722       :
2723     else
2724       echo >config.temp
2725       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2726     fi
2727
2728     # Copy the directory, assuming we have tar.
2729     # FIXME: Should we use B in the second tar?  Not all systems support it.
2730     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2731
2732     # It is the responsibility of the user to correctly adjust all
2733     # symlinks.  If somebody can figure out how to handle them correctly
2734     # here, feel free to add the code.
2735
2736     echo $1 > $2/COPIED
2737   fi
2738   shift; shift
2739 done
2740
2741 # Determine a target-dependent exec_prefix that the installed
2742 # gcc will search in.  Keep this list sorted by triplet, with
2743 # the *-*-osname triplets last.
2744 md_exec_prefix=
2745 case "${target}" in
2746   i[[34567]]86-pc-msdosdjgpp*)
2747     md_exec_prefix=/dev/env/DJDIR/bin
2748     ;;
2749   *-*-hpux* | \
2750   *-*-nto-qnx* | \
2751   *-*-solaris2*)
2752     md_exec_prefix=/usr/ccs/bin
2753     ;;
2754 esac
2755
2756 extra_arflags_for_target=
2757 extra_nmflags_for_target=
2758 extra_ranlibflags_for_target=
2759 target_makefile_frag=/dev/null
2760 case "${target}" in
2761   spu-*-*)
2762     target_makefile_frag="config/mt-spu"
2763     ;;
2764   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2765     target_makefile_frag="config/mt-sde"
2766     ;;
2767   mipsisa*-*-elfoabi*)
2768     target_makefile_frag="config/mt-mips-elfoabi"
2769     ;;
2770   mips*-*-*linux* | mips*-*-gnu*)
2771     target_makefile_frag="config/mt-mips-gnu"
2772     ;;
2773   nios2-*-elf*)
2774     target_makefile_frag="config/mt-nios2-elf"
2775     ;;
2776   *-*-linux-android*)
2777     target_makefile_frag="config/mt-android"
2778     ;;
2779   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2780     target_makefile_frag="config/mt-gnu"
2781     ;;
2782   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2783     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2784     # commands to handle both 32-bit and 64-bit objects.  These flags are
2785     # harmless if we're using GNU nm or ar.
2786     extra_arflags_for_target=" -X32_64"
2787     extra_nmflags_for_target=" -B -X32_64"
2788     ;;
2789 esac
2790
2791 alphaieee_frag=/dev/null
2792 case $target in
2793   alpha*-*-*)
2794     # This just makes sure to use the -mieee option to build target libs.
2795     # This should probably be set individually by each library.
2796     alphaieee_frag="config/mt-alphaieee"
2797     ;;
2798 esac
2799
2800 # If --enable-target-optspace always use -Os instead of -O2 to build
2801 # the target libraries, similarly if it is not specified, use -Os
2802 # on selected platforms.
2803 ospace_frag=/dev/null
2804 case "${enable_target_optspace}:${target}" in
2805   yes:*)
2806     ospace_frag="config/mt-ospace"
2807     ;;
2808   :d30v-*)
2809     ospace_frag="config/mt-d30v"
2810     ;;
2811   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2812     ospace_frag="config/mt-ospace"
2813     ;;
2814   no:* | :*)
2815     ;;
2816   *)
2817     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2818     ;;
2819 esac
2820
2821 # Some systems (e.g., one of the i386-aix systems the gas testers are
2822 # using) don't handle "\$" correctly, so don't use it here.
2823 tooldir='${exec_prefix}'/${target_noncanonical}
2824 build_tooldir=${tooldir}
2825
2826 # Create a .gdbinit file which runs the one in srcdir
2827 # and tells GDB to look there for source files.
2828
2829 if test -r ${srcdir}/.gdbinit ; then
2830   case ${srcdir} in
2831     .) ;;
2832     *) cat > ./.gdbinit <<EOF
2833 # ${NO_EDIT}
2834 dir ${srcdir}
2835 dir .
2836 source ${srcdir}/.gdbinit
2837 EOF
2838     ;;
2839   esac
2840 fi
2841
2842 # Make sure that the compiler is able to generate an executable.  If it
2843 # can't, we are probably in trouble.  We don't care whether we can run the
2844 # executable--we might be using a cross compiler--we only care whether it
2845 # can be created.  At this point the main configure script has set CC.
2846 we_are_ok=no
2847 echo "int main () { return 0; }" > conftest.c
2848 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2849 if test $? = 0 ; then
2850   if test -s conftest || test -s conftest.exe ; then
2851     we_are_ok=yes
2852   fi
2853 fi
2854 case $we_are_ok in
2855   no)
2856     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2857     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2858     rm -f conftest*
2859     exit 1
2860     ;;
2861 esac
2862 rm -f conftest*
2863
2864 # Decide which environment variable is used to find dynamic libraries.
2865 case "${host}" in
2866   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2867   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2868   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2869   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2870 esac
2871
2872 # On systems where the dynamic library environment variable is PATH,
2873 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2874 # built executables to PATH.
2875 if test "$RPATH_ENVVAR" = PATH; then
2876   GCC_SHLIB_SUBDIR=/shlib
2877 else
2878   GCC_SHLIB_SUBDIR=
2879 fi
2880
2881 # Adjust the toplevel makefile according to whether bootstrap was selected.
2882 case $enable_bootstrap in
2883   yes)
2884     bootstrap_suffix=bootstrap
2885     BUILD_CONFIG=bootstrap-debug
2886     ;;
2887   no)
2888     bootstrap_suffix=no-bootstrap
2889     BUILD_CONFIG=
2890     ;;
2891 esac
2892
2893 AC_MSG_CHECKING(for default BUILD_CONFIG)
2894
2895 AC_ARG_WITH([build-config],
2896   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2897                   [use config/NAME.mk build configuration])],
2898   [case $with_build_config in
2899    yes) with_build_config= ;;
2900    no) with_build_config= BUILD_CONFIG= ;;
2901    esac])
2902
2903 if test "x${with_build_config}" != x; then
2904   BUILD_CONFIG=$with_build_config
2905 else
2906   case $BUILD_CONFIG in
2907   bootstrap-debug)
2908     if echo "int f (void) { return 0; }" > conftest.c &&
2909        ${CC} -c conftest.c &&
2910        mv conftest.o conftest.o.g0 &&
2911        ${CC} -c -g conftest.c &&
2912        mv conftest.o conftest.o.g &&
2913        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2914       :
2915     else
2916       BUILD_CONFIG=
2917     fi
2918     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2919     ;;
2920   esac
2921 fi
2922 AC_MSG_RESULT($BUILD_CONFIG)
2923 AC_SUBST(BUILD_CONFIG)
2924
2925 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2926 AC_MSG_CHECKING([for --enable-vtable-verify])
2927 AC_ARG_ENABLE(vtable-verify,
2928 [AS_HELP_STRING([--enable-vtable-verify],
2929                 [Enable vtable verification feature])],
2930 [case "$enableval" in
2931  yes) enable_vtable_verify=yes ;;
2932  no)  enable_vtable_verify=no ;;
2933  *)   enable_vtable_verify=no;;
2934  esac],
2935 [enable_vtable_verify=no])
2936 AC_MSG_RESULT($enable_vtable_verify)
2937
2938 # Record target_configdirs and the configure arguments for target and
2939 # build configuration in Makefile.
2940 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2941 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2942 bootstrap_fixincludes=no
2943
2944 # If we are building libgomp, bootstrap it.
2945 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2946   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2947 fi
2948
2949 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2950 # or bootstrap-ubsan, bootstrap it.
2951 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2952   case "$BUILD_CONFIG" in
2953     *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
2954       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2955       bootstrap_fixincludes=yes
2956       ;;
2957   esac
2958 fi
2959
2960 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2961 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2962    test "$enable_vtable_verify" != no; then
2963   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2964 fi
2965
2966 # If we are building libatomic and the list of enabled languages includes the
2967 # D frontend, bootstrap it.
2968 if echo " ${target_configdirs} " | grep " libatomic " > /dev/null 2>&1; then
2969   case ,${enable_languages}, in
2970     *,d,*)
2971       bootstrap_target_libs=${bootstrap_target_libs}target-libatomic,
2972       ;;
2973   esac
2974 fi
2975
2976 # Determine whether gdb needs tk/tcl or not.
2977 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2978 # and in that case we want gdb to be built without tk.  Ugh!
2979 # In fact I believe gdb is the *only* package directly dependent on tk,
2980 # so we should be able to put the 'maybe's in unconditionally and
2981 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2982 # 100% sure that that's safe though.
2983
2984 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2985 case "$enable_gdbtk" in
2986   no)
2987     GDB_TK="" ;;
2988   yes)
2989     GDB_TK="${gdb_tk}" ;;
2990   *)
2991     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2992     # distro.  Eventually someone will fix this and move Insight, nee
2993     # gdbtk to a separate directory.
2994     if test -d ${srcdir}/gdb/gdbtk ; then
2995       GDB_TK="${gdb_tk}"
2996     else
2997       GDB_TK=""
2998     fi
2999     ;;
3000 esac
3001 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
3002 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
3003
3004 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
3005 # else does, only include them if one of these is built.  The Makefile
3006 # provides the ordering, so it's enough here to add to the list.
3007 case " ${configdirs} " in
3008   *\ gdb\ *)
3009     configdirs="${configdirs} gnulib gdbsupport"
3010     ;;
3011   *\ gdbserver\ *)
3012     configdirs="${configdirs} gnulib gdbsupport"
3013     ;;
3014   *\ sim\ *)
3015     configdirs="${configdirs} gnulib"
3016     ;;
3017 esac
3018
3019 # Strip out unwanted targets.
3020
3021 # While at that, we remove Makefiles if we were started for recursive
3022 # configuration, so that the top-level Makefile reconfigures them,
3023 # like we used to do when configure itself was recursive.
3024
3025 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
3026 # but now we're fixing up the Makefile ourselves with the additional
3027 # commands passed to AC_CONFIG_FILES.  Use separate variables
3028 # extrasub-{build,host,target} not because there is any reason to split
3029 # the substitutions up that way, but only to remain below the limit of
3030 # 99 commands in a script, for HP-UX sed.
3031
3032 # Do not nest @if/@endif or @unless/@endunless pairs, because
3033 # configure will not warn you at all.
3034
3035 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
3036   yes:yes:*\ gold\ *:*,c++,*) ;;
3037   yes:yes:*\ gold\ *:*)
3038     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
3039     ;;
3040 esac
3041
3042 extrasub_build=
3043 for module in ${build_configdirs} ; do
3044   if test -z "${no_recursion}" \
3045      && test -f ${build_subdir}/${module}/Makefile; then
3046     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
3047     rm -f ${build_subdir}/${module}/Makefile
3048   fi
3049   extrasub_build="$extrasub_build
3050 /^@if build-$module\$/d
3051 /^@endif build-$module\$/d
3052 /^@unless build-$module\$/,/^@endunless build-$module\$/d
3053 /^@if build-$module-$bootstrap_suffix\$/d
3054 /^@endif build-$module-$bootstrap_suffix\$/d
3055 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
3056 done
3057 extrasub_host=
3058 for module in ${configdirs} ; do
3059   if test -z "${no_recursion}"; then
3060     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
3061       if test -f ${file}; then
3062         echo 1>&2 "*** removing ${file} to force reconfigure"
3063         rm -f ${file}
3064       fi
3065     done
3066   fi
3067   case ${module},${bootstrap_fixincludes} in
3068     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
3069     *) host_bootstrap_suffix=$bootstrap_suffix ;;
3070   esac
3071   extrasub_host="$extrasub_host
3072 /^@if $module\$/d
3073 /^@endif $module\$/d
3074 /^@unless $module\$/,/^@endunless $module\$/d
3075 /^@if $module-$host_bootstrap_suffix\$/d
3076 /^@endif $module-$host_bootstrap_suffix\$/d
3077 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
3078 done
3079 extrasub_target=
3080 for module in ${target_configdirs} ; do
3081   if test -z "${no_recursion}" \
3082      && test -f ${target_subdir}/${module}/Makefile; then
3083     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
3084     rm -f ${target_subdir}/${module}/Makefile
3085   fi
3086
3087   # We only bootstrap target libraries listed in bootstrap_target_libs.
3088   case $bootstrap_target_libs in
3089     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
3090     *) target_bootstrap_suffix=no-bootstrap ;;
3091   esac
3092
3093   extrasub_target="$extrasub_target
3094 /^@if target-$module\$/d
3095 /^@endif target-$module\$/d
3096 /^@unless target-$module\$/,/^@endunless target-$module\$/d
3097 /^@if target-$module-$target_bootstrap_suffix\$/d
3098 /^@endif target-$module-$target_bootstrap_suffix\$/d
3099 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
3100 done
3101
3102 # Do the final fixup along with target modules.
3103 extrasub_target="$extrasub_target
3104 /^@if /,/^@endif /d
3105 /^@unless /d
3106 /^@endunless /d"
3107
3108 if test "$enable_pgo_build" != "no"; then
3109   extrasub_build="$extrasub_build
3110 /^@if pgo-build\$/d
3111 /^@endif pgo-build\$/d"
3112 fi
3113
3114 # Create the serialization dependencies.  This uses a temporary file.
3115
3116 AC_ARG_ENABLE([serial-configure],
3117 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
3118                 [force sequential configuration of
3119                  sub-packages for the host, target or build
3120                  machine, or all sub-packages])])
3121
3122 case ${enable_serial_configure} in
3123   yes)
3124     enable_serial_build_configure=yes
3125     enable_serial_host_configure=yes
3126     enable_serial_target_configure=yes
3127     ;;
3128 esac
3129
3130 # These force 'configure's to be done one at a time, to avoid problems
3131 # with contention over a shared config.cache.
3132 rm -f serdep.tmp
3133 if test "x${enable_serial_build_configure}" = xyes || test "x${enable_serial_host_configure}" = xyes || test "x${enable_serial_target_configure}" = xyes; then
3134 echo '# serdep.tmp' > serdep.tmp
3135 fi
3136 olditem=
3137 test "x${enable_serial_build_configure}" = xyes &&
3138 for item in ${build_configdirs} ; do
3139   case ${olditem} in
3140     "") ;;
3141     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
3142   esac
3143   olditem=${item}
3144 done
3145 olditem=
3146 test "x${enable_serial_host_configure}" = xyes &&
3147 for item in ${configdirs} ; do
3148   case ${olditem} in
3149     "") ;;
3150     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
3151   esac
3152   olditem=${item}
3153 done
3154 olditem=
3155 test "x${enable_serial_target_configure}" = xyes &&
3156 for item in ${target_configdirs} ; do
3157   case ${olditem} in
3158     "") ;;
3159     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
3160   esac
3161   olditem=${item}
3162 done
3163 serialization_dependencies=serdep.tmp
3164 AC_SUBST_FILE(serialization_dependencies)
3165
3166 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
3167 # target, nonopt, and variable assignments.  These are the ones we
3168 # might not want to pass down to subconfigures.  The exception being
3169 # --cache-file=/dev/null, which is used to turn off the use of cache
3170 # files altogether, and which should be passed on to subconfigures.
3171 # Also strip program-prefix, program-suffix, and program-transform-name,
3172 # so that we can pass down a consistent program-transform-name.
3173 baseargs=
3174 tbaseargs=
3175 keep_next=no
3176 skip_next=no
3177 eval "set -- $ac_configure_args"
3178 for ac_arg
3179 do
3180   if test X"$skip_next" = X"yes"; then
3181     skip_next=no
3182     continue
3183   fi
3184   if test X"$keep_next" = X"yes"; then
3185     case $ac_arg in
3186       *\'*)
3187         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3188     esac
3189     baseargs="$baseargs '$ac_arg'"
3190     tbaseargs="$tbaseargs '$ac_arg'"
3191     keep_next=no
3192     continue
3193   fi
3194
3195   # Handle separated arguments.  Based on the logic generated by
3196   # autoconf 2.59.
3197   case $ac_arg in
3198     *=* | --config-cache | -C | -disable-* | --disable-* \
3199       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3200       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3201       | -with-* | --with-* | -without-* | --without-* | --x)
3202       separate_arg=no
3203       ;;
3204     -*)
3205       separate_arg=yes
3206       ;;
3207     *)
3208       separate_arg=no
3209       ;;
3210   esac
3211
3212   skip_targ=no
3213   case $ac_arg in
3214 changequote(,)
3215   --with-* | --without-*)
3216     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3217
3218     case $libopt in
3219     *[-_]include)
3220       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3221       ;;
3222     *[-_]lib)
3223       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3224       ;;
3225     *)
3226       lib=$libopt
3227       ;;
3228     esac
3229 changequote([,])
3230
3231     case $lib in
3232     mpc | mpfr | gmp | isl)
3233       # If we're processing --with-$lib, --with-$lib-include or
3234       # --with-$lib-lib, for one of the libs above, and target is
3235       # different from host, don't pass the current argument to any
3236       # target library's configure.
3237       if test x$is_cross_compiler = xyes; then
3238         skip_targ=yes
3239       fi
3240       ;;
3241     esac
3242     ;;
3243   esac
3244
3245   case "$ac_arg" in
3246     --cache-file=/dev/null | \
3247     -cache-file=/dev/null )
3248       # Handled here to avoid the test to skip args below.
3249       baseargs="$baseargs '$ac_arg'"
3250       tbaseargs="$tbaseargs '$ac_arg'"
3251       # Assert: $separate_arg should always be no.
3252       keep_next=$separate_arg
3253       ;;
3254     --no*)
3255       continue
3256       ;;
3257     --c* | \
3258     --sr* | \
3259     --ho* | \
3260     --bu* | \
3261     --t* | \
3262     --program-* | \
3263     -cache_file* | \
3264     -srcdir* | \
3265     -host* | \
3266     -build* | \
3267     -target* | \
3268     -program-prefix* | \
3269     -program-suffix* | \
3270     -program-transform-name* )
3271       skip_next=$separate_arg
3272       continue
3273       ;;
3274     -*)
3275       # An option.  Add it.
3276       case $ac_arg in
3277         *\'*)
3278           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3279       esac
3280       baseargs="$baseargs '$ac_arg'"
3281       if test X"$skip_targ" = Xno; then
3282         tbaseargs="$tbaseargs '$ac_arg'"
3283       fi
3284       keep_next=$separate_arg
3285       ;;
3286     *)
3287       # Either a variable assignment, or a nonopt (triplet).  Don't
3288       # pass it down; let the Makefile handle this.
3289       continue
3290       ;;
3291   esac
3292 done
3293 # Remove the initial space we just introduced and, as these will be
3294 # expanded by make, quote '$'.
3295 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3296
3297 # Add in --program-transform-name, after --program-prefix and
3298 # --program-suffix have been applied to it.  Autoconf has already
3299 # doubled dollar signs and backslashes in program_transform_name; we want
3300 # the backslashes un-doubled, and then the entire thing wrapped in single
3301 # quotes, because this will be expanded first by make and then by the shell.
3302 # Also, because we want to override the logic in subdir configure scripts to
3303 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3304 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3305 ${program_transform_name}
3306 EOF_SED
3307 gcc_transform_name=`cat conftestsed.out`
3308 rm -f conftestsed.out
3309 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3310 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3311 if test "$silent" = yes; then
3312   baseargs="$baseargs --silent"
3313   tbaseargs="$tbaseargs --silent"
3314 fi
3315 baseargs="$baseargs --disable-option-checking"
3316 tbaseargs="$tbaseargs --disable-option-checking"
3317
3318 # Record and document user additions to sub configure arguments.
3319 AC_ARG_VAR([build_configargs],
3320            [additional configure arguments for build directories])
3321 AC_ARG_VAR([host_configargs],
3322            [additional configure arguments for host directories])
3323 AC_ARG_VAR([target_configargs],
3324            [additional configure arguments for target directories])
3325
3326 # For the build-side libraries, we just need to pretend we're native,
3327 # and not use the same cache file.  Multilibs are neither needed nor
3328 # desired.  We can't even use the same cache file for all build-side
3329 # libraries, as they're compiled differently; some with C, some with
3330 # C++ or with different feature-enabling options.
3331 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3332
3333 # For host modules, accept cache file option, or specification as blank.
3334 case "${cache_file}" in
3335 "") # empty
3336   cache_file_option="" ;;
3337 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3338   cache_file_option="--cache-file=${cache_file}" ;;
3339 *) # relative path
3340   cache_file_option="--cache-file=../${cache_file}" ;;
3341 esac
3342
3343 # Host dirs don't like to share a cache file either, horribly enough.
3344 # This seems to be due to autoconf 2.5x stupidity.
3345 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3346
3347 target_configargs="$target_configargs ${tbaseargs}"
3348
3349 # Passing a --with-cross-host argument lets the target libraries know
3350 # whether they are being built with a cross-compiler or being built
3351 # native.  However, it would be better to use other mechanisms to make the
3352 # sorts of decisions they want to make on this basis.  Please consider
3353 # this option to be deprecated.  FIXME.
3354 if test x${is_cross_compiler} = xyes ; then
3355   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3356 fi
3357
3358 # Special user-friendly check for native x86_64-linux build, if
3359 # multilib is not explicitly enabled.
3360 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3361   x86_64-*linux*:yes:$build:$build:)
3362     # Make sure we have a development environment that handles 32-bit
3363     dev64=no
3364     echo "int main () { return 0; }" > conftest.c
3365     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3366     if test $? = 0 ; then
3367       if test -s conftest || test -s conftest.exe ; then
3368         dev64=yes
3369       fi
3370     fi
3371     rm -f conftest*
3372     if test x${dev64} != xyes ; then
3373       AC_MSG_ERROR([I suspect your system does not have 32-bit development libraries (libc and headers). If you have them, rerun configure with --enable-multilib. If you do not have them, and want to build a 64-bit-only compiler, rerun configure with --disable-multilib.])
3374     fi
3375     ;;
3376 esac
3377
3378 # Default to --enable-multilib.
3379 if test x${enable_multilib} = x ; then
3380   target_configargs="--enable-multilib ${target_configargs}"
3381 fi
3382
3383 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3384 # changed from the earlier setting of with_newlib.
3385 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3386   target_configargs="--with-newlib ${target_configargs}"
3387 fi
3388
3389 # Different target subdirs use different values of certain variables
3390 # (notably CXX).  Worse, multilibs use *lots* of different values.
3391 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3392 # it doesn't automatically accept command-line overrides of them.
3393 # This means it's not safe for target subdirs to share a cache file,
3394 # which is disgusting, but there you have it.  Hopefully this can be
3395 # fixed in future.  It's still worthwhile to use a cache file for each
3396 # directory.  I think.
3397
3398 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3399 # We need to pass --target, as newer autoconf's requires consistency
3400 # for target_alias and gcc doesn't manage it consistently.
3401 target_configargs="--cache-file=./config.cache ${target_configargs}"
3402
3403 FLAGS_FOR_TARGET=
3404 case " $target_configdirs " in
3405  *" newlib "*)
3406   case " $target_configargs " in
3407   *" --with-newlib "*)
3408    case "$target" in
3409     *-cygwin*)
3410       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3411       ;;
3412    esac
3413
3414    # If we're not building GCC, don't discard standard headers.
3415    if test -d ${srcdir}/gcc; then
3416      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3417
3418      if test "${build}" != "${host}"; then
3419        # On Canadian crosses, CC_FOR_TARGET will have already been set
3420        # by `configure', so we won't have an opportunity to add -Bgcc/
3421        # to it.  This is right: we don't want to search that directory
3422        # for binaries, but we want the header files in there, so add
3423        # them explicitly.
3424        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3425
3426        # Someone might think of using the pre-installed headers on
3427        # Canadian crosses, in case the installed compiler is not fully
3428        # compatible with the compiler being built.  In this case, it
3429        # would be better to flag an error than risking having
3430        # incompatible object files being constructed.  We can't
3431        # guarantee that an error will be flagged, but let's hope the
3432        # compiler will do it, when presented with incompatible header
3433        # files.
3434      fi
3435    fi
3436
3437    case "${target}-${is_cross_compiler}" in
3438    i[[3456789]]86-*-linux*-no)
3439       # Here host == target, so we don't need to build gcc,
3440       # so we don't want to discard standard headers.
3441       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3442       ;;
3443    *)
3444       # If we're building newlib, use its generic headers last, but search
3445       # for any libc-related directories first (so make it the last -B
3446       # switch).
3447       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3448
3449       # If we're building libgloss, find the startup file, simulator library
3450       # and linker script.
3451       case " $target_configdirs " in
3452         *" libgloss "*)
3453         # Look for startup file, simulator library and maybe linker script.
3454         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3455         # Look for libnosys.a in case the target needs it.
3456         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3457         # Most targets have the linker script in the source directory.
3458         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3459         ;;
3460       esac
3461       ;;
3462    esac
3463    ;;
3464   esac
3465   ;;
3466 esac
3467
3468 case "$target" in
3469   x86_64-*mingw* | *-w64-mingw*)
3470   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3471   # however, use a symlink named 'mingw' in ${prefix} .
3472     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3473     ;;
3474   *-mingw*)
3475   # MinGW can't be handled as Cygwin above since it does not use newlib.
3476     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3477     ;;
3478 esac
3479
3480 # Allow the user to override the flags for
3481 # our build compiler if desired.
3482 if test x"${build}" = x"${host}" ; then
3483   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3484   CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
3485   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3486   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3487 fi
3488
3489 # On Canadian crosses, we'll be searching the right directories for
3490 # the previously-installed cross compiler, so don't bother to add
3491 # flags for directories within the install tree of the compiler
3492 # being built; programs in there won't even run.
3493 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3494   # Search for pre-installed headers if nothing else fits.
3495   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3496 fi
3497
3498 if test "x${use_gnu_ld}" = x &&
3499    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3500   # Arrange for us to find uninstalled linker scripts.
3501   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3502 fi
3503
3504 # Search for other target-specific linker scripts and such.
3505 case "${target}" in
3506   mep*)
3507     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3508     ;;
3509   # The VxWorks support for shared libraries is getting in
3510   # incrementally.  Make sure it doesn't get activated implicitly:
3511   *vxworks*)
3512     if test "${enable_shared-unset}" = unset ; then
3513       enable_shared=no
3514       # So the build of libraries knows ...
3515       target_configargs="${target_configargs} --disable-shared"
3516       # So gcc knows ...
3517       host_configargs="${host_configargs} --disable-shared"
3518     fi
3519     ;;
3520 esac
3521
3522 # Makefile fragments.
3523 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3524 do
3525   eval fragval=\$$frag
3526   if test $fragval != /dev/null; then
3527     eval $frag=${srcdir}/$fragval
3528   fi
3529 done
3530 AC_SUBST_FILE(host_makefile_frag)
3531 AC_SUBST_FILE(target_makefile_frag)
3532 AC_SUBST_FILE(alphaieee_frag)
3533 AC_SUBST_FILE(ospace_frag)
3534
3535 # Miscellanea: directories, flags, etc.
3536 AC_SUBST(RPATH_ENVVAR)
3537 AC_SUBST(GCC_SHLIB_SUBDIR)
3538 AC_SUBST(tooldir)
3539 AC_SUBST(build_tooldir)
3540 AC_SUBST(CONFIGURE_GDB_TK)
3541 AC_SUBST(GDB_TK)
3542 AC_SUBST(INSTALL_GDB_TK)
3543
3544 # Build module lists & subconfigure args.
3545 AC_SUBST(build_configargs)
3546 AC_SUBST(build_configdirs)
3547
3548 # Host module lists & subconfigure args.
3549 AC_SUBST(host_configargs)
3550 AC_SUBST(configdirs)
3551 AC_SUBST(target_configdirs)
3552
3553 # Target module lists & subconfigure args.
3554 AC_SUBST(target_configargs)
3555
3556
3557 # Build tools.
3558 AC_SUBST(AR_FOR_BUILD)
3559 AC_SUBST(AS_FOR_BUILD)
3560 AC_SUBST(CC_FOR_BUILD)
3561 AC_SUBST(CFLAGS_FOR_BUILD)
3562 AC_SUBST(CPP_FOR_BUILD)
3563 AC_SUBST(CPPFLAGS_FOR_BUILD)
3564 AC_SUBST(CXXFLAGS_FOR_BUILD)
3565 AC_SUBST(CXX_FOR_BUILD)
3566 AC_SUBST(DLLTOOL_FOR_BUILD)
3567 AC_SUBST(DSYMUTIL_FOR_BUILD)
3568 AC_SUBST(GFORTRAN_FOR_BUILD)
3569 AC_SUBST(GOC_FOR_BUILD)
3570 AC_SUBST(GDC_FOR_BUILD)
3571 AC_SUBST(LDFLAGS_FOR_BUILD)
3572 AC_SUBST(LD_FOR_BUILD)
3573 AC_SUBST(NM_FOR_BUILD)
3574 AC_SUBST(RANLIB_FOR_BUILD)
3575 AC_SUBST(WINDMC_FOR_BUILD)
3576 AC_SUBST(WINDRES_FOR_BUILD)
3577
3578 # Generate default definitions for YACC, M4, LEX and other programs that run
3579 # on the build machine.  These are used if the Makefile can't locate these
3580 # programs in objdir.
3581 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3582
3583 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3584 case " $build_configdirs " in
3585   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3586 esac
3587
3588 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3589 case " $build_configdirs " in
3590   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3591 esac
3592
3593 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3594 case " $build_configdirs " in
3595   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3596 esac
3597
3598 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3599 case " $build_configdirs " in
3600   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3601   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3602 esac
3603
3604 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3605 case " $build_configdirs " in
3606   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3607 esac
3608
3609 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3610 case " $build_configdirs " in
3611   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3612   *)
3613 changequote(,)
3614     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3615     # higher, else we use the "missing" dummy.
3616     if ${MAKEINFO} --version \
3617        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3618       :
3619     else
3620       MAKEINFO="$MISSING makeinfo"
3621     fi
3622     ;;
3623 changequote([,])
3624 esac
3625
3626 # FIXME: expect and dejagnu may become build tools?
3627
3628 AC_CHECK_PROGS(EXPECT, expect, expect)
3629 case " $configdirs " in
3630   *" expect "*)
3631     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3632     ;;
3633 esac
3634
3635 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3636 case " $configdirs " in
3637   *" dejagnu "*)
3638     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3639     ;;
3640 esac
3641
3642
3643 # Host tools.
3644 NCN_STRICT_CHECK_TOOLS(AR, ar)
3645 NCN_STRICT_CHECK_TOOLS(AS, as)
3646 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3647 NCN_STRICT_CHECK_TOOLS(DSYMUTIL, dsymutil)
3648 NCN_STRICT_CHECK_TOOLS(LD, ld)
3649 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3650 NCN_STRICT_CHECK_TOOLS(NM, nm)
3651 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3652 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3653 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3654 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3655 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3656 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3657 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3658 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3659 AC_SUBST(CC)
3660 AC_SUBST(CXX)
3661 AC_SUBST(CFLAGS)
3662 AC_SUBST(CXXFLAGS)
3663 AC_SUBST(GDC)
3664 AC_SUBST(GDCFLAGS)
3665
3666 # Target tools.
3667 AC_ARG_WITH([build-time-tools],
3668   [AS_HELP_STRING([--with-build-time-tools=PATH],
3669                   [use given path to find target tools during the build])],
3670   [case x"$withval" in
3671      x/*) ;;
3672      *)
3673        with_build_time_tools=
3674        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3675        ;;
3676    esac],
3677   [with_build_time_tools=])
3678
3679 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3680 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3681 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3682 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3683 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3684 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3685 NCN_STRICT_CHECK_TARGET_TOOLS(GM2_FOR_TARGET, gm2)
3686
3687 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3688 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3689 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3690 ACX_CHECK_INSTALLED_TARGET_TOOL(DSYMUTIL_FOR_TARGET, dsymutil)
3691 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3692 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3693 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3694 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3695 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3696 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3697 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3698 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3699 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3700 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3701 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3702
3703 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3704
3705 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3706 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3707 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3708 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3709 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3710                 [gcc/xg++ -B$$r/$(HOST_SUBDIR)/gcc/ -nostdinc++ `if test -f $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags; then $(SHELL) $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags --build-includes; else echo -funconfigured-libstdc++-v3 ; fi` -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3711                 c++)
3712 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3713                 [gcc/xgcc -shared-libgcc -B$$r/$(HOST_SUBDIR)/gcc -nostdinc++ -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3714                 c++)
3715 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3716 GCC_TARGET_TOOL(dsymutil, DSYMUTIL_FOR_TARGET, DSYMUTIL)
3717 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3718 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3719                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3720 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3721                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3722 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3723                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3724 GCC_TARGET_TOOL(gm2, GM2_FOR_TARGET, GM2,
3725                 [gcc/gm2 -B$$r/$(HOST_SUBDIR)/gcc/], m2)
3726 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3727 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3728 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3729 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3730 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3731 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3732 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3733 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3734 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3735 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3736 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3737
3738 AC_SUBST(FLAGS_FOR_TARGET)
3739 AC_SUBST(RAW_CXX_FOR_TARGET)
3740
3741 # Certain tools may need extra flags.
3742 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3743 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3744 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3745
3746 # When building target libraries, except in a Canadian cross, we use
3747 # the same toolchain as the compiler we just built.
3748 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3749 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3750 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3751 if test $host = $build; then
3752   case " $configdirs " in
3753     *" gcc "*)
3754       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3755       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3756       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3757       ;;
3758   esac
3759 fi
3760
3761 AC_SUBST(COMPILER_AS_FOR_TARGET)
3762 AC_SUBST(COMPILER_LD_FOR_TARGET)
3763 AC_SUBST(COMPILER_NM_FOR_TARGET)
3764
3765 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3766 AC_ARG_ENABLE(maintainer-mode,
3767 [AS_HELP_STRING([--enable-maintainer-mode],
3768                 [enable make rules and dependencies not useful
3769                  (and sometimes confusing) to the casual installer])],
3770       USE_MAINTAINER_MODE=$enableval,
3771       USE_MAINTAINER_MODE=no)
3772 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3773 AC_SUBST(MAINTAINER_MODE_TRUE)
3774 AC_SUBST(MAINTAINER_MODE_FALSE)
3775 if test "$USE_MAINTAINER_MODE" = yes; then
3776   MAINTAINER_MODE_TRUE=
3777   MAINTAINER_MODE_FALSE='#'
3778 else
3779   MAINTAINER_MODE_TRUE='#'
3780   MAINTAINER_MODE_FALSE=
3781 fi
3782 MAINT=$MAINTAINER_MODE_TRUE
3783 AC_SUBST(MAINT)dnl
3784
3785 # ---------------------
3786 # GCC bootstrap support
3787 # ---------------------
3788
3789 # Stage specific cflags for build.
3790 stage1_cflags="-g"
3791 case $build in
3792   vax-*-*)
3793     case ${GCC} in
3794       yes) stage1_cflags="-g -Wa,-J" ;;
3795       *) stage1_cflags="-g -J" ;;
3796     esac ;;
3797 esac
3798
3799 AC_SUBST(stage1_cflags)
3800
3801 # Enable --enable-checking in stage1 of the compiler.
3802 AC_ARG_ENABLE(stage1-checking,
3803 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3804                 [choose additional checking for stage1 of the compiler])],
3805 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3806 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3807   # For --disable-checking or implicit --enable-checking=release, avoid
3808   # setting --enable-checking=gc in the default stage1 checking for LTO
3809   # bootstraps.  See PR62077.
3810   case $BUILD_CONFIG in
3811     *lto*)
3812       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3813     *)
3814       stage1_checking=--enable-checking=yes,types;;
3815   esac
3816   if test "x$enable_checking" = x && \
3817      test -d ${srcdir}/gcc && \
3818      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3819     stage1_checking=--enable-checking=yes,types,extra
3820   fi
3821 else
3822   stage1_checking=--enable-checking=$enable_checking,types
3823 fi])
3824 AC_SUBST(stage1_checking)
3825
3826 # Enable -Werror in bootstrap stage2 and later.
3827 AC_ARG_ENABLE(werror,
3828 [AS_HELP_STRING([--enable-werror],
3829                 [enable -Werror in bootstrap stage2 and later])],
3830 [
3831 case ${enable_werror} in
3832   yes) stage2_werror_flag="--enable-werror-always" ;;
3833   *) stage2_werror_flag="" ;;
3834 esac
3835 ],
3836 [
3837 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3838   case $BUILD_CONFIG in
3839   bootstrap-debug)
3840       stage2_werror_flag="--enable-werror-always" ;;
3841   "")
3842       stage2_werror_flag="--enable-werror-always" ;;
3843   esac
3844 fi
3845 ])
3846
3847 AC_SUBST(stage2_werror_flag)
3848
3849 # Specify what files to not compare during bootstrap.
3850
3851 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3852 compare_exclusions="$compare_exclusions | gcc/m2/gm2-compiler-boot/M2Version*"
3853 compare_exclusions="$compare_exclusions | gcc/m2/gm2-compiler-boot/SYSTEM*"
3854 compare_exclusions="$compare_exclusions | gcc/m2/gm2version*"
3855 case "$target" in
3856   hppa*64*-*-hpux*) ;;
3857   powerpc*-ibm-aix*) compare_exclusions="$compare_exclusions | *libgomp*\$(objext)" ;;
3858 esac
3859 AC_SUBST(compare_exclusions)
3860
3861 AC_CONFIG_FILES([Makefile],
3862   [sed "$extrasub_build" Makefile |
3863    sed "$extrasub_host" |
3864    sed "$extrasub_target" > mf$$
3865    mv -f mf$$ Makefile],
3866   [extrasub_build="$extrasub_build"
3867    extrasub_host="$extrasub_host"
3868    extrasub_target="$extrasub_target"])
3869 AC_OUTPUT