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