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(config/gcc-plugin.m4)
  28 m4_include([libtool.m4])
  29 m4_include([ltoptions.m4])
  30 m4_include([ltsugar.m4])
  31 m4_include([ltversion.m4])
  32 m4_include([lt~obsolete.m4])
  33 m4_include([config/isl.m4])
  34
  35 AC_INIT(move-if-change)
  36 AC_DISABLE_OPTION_CHECKING
  37
  38 progname=$0
  39 # if PWD already has a value, it is probably wrong.
  40 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  41
  42 # Export original configure arguments for use by sub-configures.
  43 # Quote arguments with shell meta charatcers.
  44 TOPLEVEL_CONFIGURE_ARGUMENTS=
  45 set -- "$progname" "$@"
  46 for ac_arg
  47 do
  48   case "$ac_arg" in
  49   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  50     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  51     # if the argument is of the form -foo=baz, quote the baz part only
  52     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  53   *) ;;
  54   esac
  55   # Add the quoted argument to the list.
  56   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  57 done
  58 if test "$silent" = yes; then
  59   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  60 fi
  61 # Remove the initial space we just introduced and, as these will be
  62 # expanded by make, quote '$'.
  63 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  64 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  65
  66 # Find the build, host, and target systems.
  67 ACX_NONCANONICAL_BUILD
  68 ACX_NONCANONICAL_HOST
  69 ACX_NONCANONICAL_TARGET
  70
  71 dnl Autoconf 2.5x and later will set a default program prefix if
  72 dnl --target was used, even if it was the same as --host.  Disable
  73 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  74 dnl to take effect.
  75 test "$host_noncanonical" = "$target_noncanonical" &&
  76   test "$program_prefix$program_suffix$program_transform_name" = \
  77     NONENONEs,x,x, &&
  78   program_transform_name=s,y,y,
  79
  80 AC_CANONICAL_SYSTEM
  81 AC_ARG_PROGRAM
  82
  83 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  84 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  85
  86 # Get 'install' or 'install-sh' and its variants.
  87 AC_PROG_INSTALL
  88 ACX_PROG_LN
  89 AC_PROG_LN_S
  90 AC_PROG_SED
  91 AC_PROG_AWK
  92
  93 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  94
  95 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  96 # a relative path.
  97 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  98   INSTALL="${srcpwd}/install-sh -c"
  99 fi
 100
 101 # Set srcdir to "." if that's what it is.
 102 # This is important for multilib support.
 103 pwd=`${PWDCMD-pwd}`
 104 if test "${pwd}" = "${srcpwd}" ; then
 105   srcdir=.
 106 fi
 107
 108 topsrcdir=$srcpwd
 109
 110 extra_host_args=
 111
 112 ### To add a new directory to the tree, first choose whether it is a target
 113 ### or a host dependent tool.  Then put it into the appropriate list
 114 ### (library or tools, host or target), doing a dependency sort.
 115
 116 # Subdirs will be configured in the order listed in build_configdirs,
 117 # configdirs, or target_configdirs; see the serialization section below.
 118
 119 # Dependency sorting is only needed when *configuration* must be done in
 120 # a particular order.  In all cases a dependency should be specified in
 121 # the Makefile, whether or not it's implicitly specified here.
 122
 123 # Double entries in build_configdirs, configdirs, or target_configdirs may
 124 # cause circular dependencies and break everything horribly.
 125
 126 # these library is used by various programs built for the build
 127 # environment
 128 #
 129 build_libs="build-libiberty build-libcpp"
 130
 131 # these tools are built for the build environment
 132 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 133
 134 # these libraries are used by various programs built for the host environment
 135 #f
 136 host_libs="gettext libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libcody libdecnumber gmp mpfr mpc isl libiconv libctf libsframe libgrust "
 137
 138 # these tools are built for the host environment
 139 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 140 # know that we are building the simulator.
 141 # binutils, gas and ld appear in that order because it makes sense to run
 142 # "make check" in that particular order.
 143 # If --enable-gold is used, "gold" may replace "ld".
 144 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gdbserver gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gm2tools gotools c++tools"
 145
 146 # these libraries are built for the target environment, and are built after
 147 # the host libraries and the host tools (which may be a cross compiler)
 148 # Note that libiberty is not a target library.
 149 target_libraries="target-libgcc \
 150                 target-libbacktrace \
 151                 target-libgloss \
 152                 target-newlib \
 153                 target-libgomp \
 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-libgm2 \
 166                 target-libgo \
 167                 target-libgrust \
 168                 target-libphobos \
 169                 target-zlib"
 170
 171 # these tools are built using the target libraries, and are intended to
 172 # run only in the target environment
 173 #
 174 # note: any program that *uses* libraries that are in the "target_libraries"
 175 # list belongs in this list.
 176 #
 177 target_tools="target-rda"
 178
 179 ################################################################################
 180
 181 ## All tools belong in one of the four categories, and are assigned above
 182 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 183 ## is important because configure will choke if they ever get through.
 184 ## ${configdirs} is directories we build using the host tools.
 185 ## ${target_configdirs} is directories we build using the target tools.
 186 configdirs=`echo ${host_libs} ${host_tools}`
 187 target_configdirs=`echo ${target_libraries} ${target_tools}`
 188 build_configdirs=`echo ${build_libs} ${build_tools}`
 189
 190 m4_divert_text([PARSE_ARGS],
 191 [case $srcdir in
 192   *" "*)
 193 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 194     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 195 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 196     ;;
 197 esac
 198 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 199 ])
 200
 201 ################################################################################
 202
 203 srcname="gnu development package"
 204
 205 # This gets set non-empty for some net releases of packages.
 206 appdirs=""
 207
 208 # Define is_cross_compiler to save on calls to 'test'.
 209 is_cross_compiler=
 210 if test x"${host}" = x"${target}" ; then
 211   is_cross_compiler=no
 212 else
 213   is_cross_compiler=yes
 214 fi
 215
 216 # Find the build and target subdir names.
 217 GCC_TOPLEV_SUBDIRS
 218 # Be sure to cover against remnants of an in-tree build.
 219 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 220   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 221 Use a pristine source tree when building in a separate tree])
 222 fi
 223
 224 # Skipdirs are removed silently.
 225 skipdirs=
 226 # Noconfigdirs are removed loudly.
 227 noconfigdirs=""
 228
 229 use_gnu_ld=
 230 # Make sure we don't let GNU ld be added if we didn't want it.
 231 if test x$with_gnu_ld = xno ; then
 232   use_gnu_ld=no
 233   noconfigdirs="$noconfigdirs ld gold"
 234 fi
 235
 236 use_gnu_as=
 237 # Make sure we don't let GNU as be added if we didn't want it.
 238 if test x$with_gnu_as = xno ; then
 239   use_gnu_as=no
 240   noconfigdirs="$noconfigdirs gas"
 241 fi
 242
 243 use_included_zlib=
 244 AC_ARG_WITH(system-zlib,
 245 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 246 # Make sure we don't let ZLIB be added if we didn't want it.
 247 if test x$with_system_zlib = xyes ; then
 248   use_included_zlib=no
 249   noconfigdirs="$noconfigdirs zlib"
 250 fi
 251
 252 # Don't compile the bundled readline/libreadline.a if --with-system-readline
 253 # is provided.
 254 if test x$with_system_readline = xyes ; then
 255   noconfigdirs="$noconfigdirs readline"
 256 fi
 257
 258 AC_ARG_WITH(zstd,
 259 [AS_HELP_STRING([--with-zstd], [Support zstd compressed debug sections (default=auto)])])
 260
 261 # some tools are so dependent upon X11 that if we're not building with X,
 262 # it's not even worth trying to configure, much less build, that tool.
 263
 264 case ${with_x} in
 265   yes | "") ;; # the default value for this tree is that X11 is available
 266   no)
 267     skipdirs="${skipdirs} tk itcl libgui"
 268     # We won't be able to build gdbtk without X.
 269     enable_gdbtk=no
 270     ;;
 271   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 272 esac
 273
 274 # Some are only suitable for cross toolchains.
 275 # Remove these if host=target.
 276 cross_only="target-libgloss target-newlib target-opcodes"
 277
 278 case $is_cross_compiler in
 279   no) skipdirs="${skipdirs} ${cross_only}" ;;
 280 esac
 281
 282 # If both --with-headers and --with-libs are specified, default to
 283 # --without-newlib.
 284 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 285    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 286   if test x"${with_newlib}" = x ; then
 287     with_newlib=no
 288   fi
 289 fi
 290
 291 # Recognize --with-newlib/--without-newlib.
 292 case ${with_newlib} in
 293   no) skipdirs="${skipdirs} target-newlib" ;;
 294   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 295 esac
 296
 297 AC_ARG_ENABLE(as-accelerator-for,
 298 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 299                 [build as offload target compiler.
 300                 Specify offload host triple by ARG])])
 301
 302 AC_ARG_ENABLE(offload-targets,
 303 [AS_HELP_STRING([--enable-offload-targets=LIST],
 304                 [enable offloading to devices from comma-separated LIST of
 305                 TARGET[=DIR]. Use optional path to find offload target compiler
 306                 during the build])],
 307 [
 308   if test x"$enable_offload_targets" = x; then
 309     AC_MSG_ERROR([no offload targets specified])
 310   fi
 311 ], [enable_offload_targets=])
 312
 313 AC_ARG_ENABLE(offload-defaulted,
 314 [AS_HELP_STRING([--enable-offload-defaulted]
 315                 [If enabled, configured but not installed offload compilers and
 316                 libgomp plugins are silently ignored.  Useful for distribution
 317                 compilers where those are in separate optional packages.])],
 318 [enable_offload_defaulted=$enableval],
 319 [enable_offload_defaulted=])
 320
 321 # Handle --enable-gold, --enable-ld.
 322 # --disable-gold [--enable-ld]
 323 #     Build only ld.  Default option.
 324 # --enable-gold [--enable-ld]
 325 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 326 #     as "ld.bfd" and "ld".
 327 # --enable-gold=default [--enable-ld]
 328 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 329 #     install ld as "ld.bfd".
 330 # --enable-gold[=default] --disable-ld
 331 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 332 # --enable-gold --enable-ld=default
 333 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 334 #     and ld.bfd).
 335 #     In other words, ld is default
 336 # --enable-gold=default --enable-ld=default
 337 #     Error.
 338
 339 default_ld=
 340 AC_ARG_ENABLE(gold,
 341 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 342                 [build gold @<:@ARG={default,yes,no}@:>@])],
 343 ENABLE_GOLD=$enableval,
 344 ENABLE_GOLD=no)
 345 case "${ENABLE_GOLD}" in
 346   yes|default)
 347     # Check for ELF target.
 348     is_elf=no
 349     case "${target}" in
 350       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 351       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 352       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 353       | *-*-solaris2* | *-*-nto* | *-*-nacl* | *-*-haiku*)
 354         case "${target}" in
 355           *-*-linux*aout* | *-*-linux*oldld*)
 356             ;;
 357           *)
 358             is_elf=yes
 359             ;;
 360         esac
 361     esac
 362
 363     if test "$is_elf" = "yes"; then
 364       # Check for target supported by gold.
 365       case "${target}" in
 366         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 367         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-*)
 368           configdirs="$configdirs gold"
 369           if test x${ENABLE_GOLD} = xdefault; then
 370             default_ld=gold
 371           fi
 372           ENABLE_GOLD=yes
 373           ;;
 374       esac
 375     fi
 376     ;;
 377   no)
 378     ;;
 379   *)
 380     AC_MSG_ERROR([invalid --enable-gold argument])
 381     ;;
 382 esac
 383
 384 AC_ARG_ENABLE(ld,
 385 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 386                 [build ld @<:@ARG={default,yes,no}@:>@])],
 387 ENABLE_LD=$enableval,
 388 ENABLE_LD=yes)
 389
 390 case "${ENABLE_LD}" in
 391   default)
 392     if test x${default_ld} != x; then
 393       AC_MSG_ERROR([either gold or ld can be the default ld])
 394     fi
 395     ;;
 396   yes)
 397     ;;
 398   no)
 399     if test x${ENABLE_GOLD} != xyes; then
 400       AC_MSG_WARN([neither ld nor gold are enabled])
 401     fi
 402     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 403     ;;
 404   *)
 405     AC_MSG_ERROR([invalid --enable-ld argument])
 406     ;;
 407 esac
 408
 409 AC_ARG_ENABLE(gprofng,
 410 [AS_HELP_STRING([[--enable-gprofng[=ARG]]],
 411                 [build gprofng @<:@ARG={yes,no}@:>@])],
 412 enable_gprofng=$enableval,
 413 enable_gprofng=yes)
 414 if test "$enable_gprofng" = "yes"; then
 415   case "${target}" in
 416     x86_64-*-linux* | i?86-*-linux* | aarch64-*-linux*)
 417     configdirs="$configdirs gprofng"
 418     ;;
 419   esac
 420 fi
 421
 422
 423 # PR gas/19109
 424 # Decide the default method for compressing debug sections.
 425 # Provide a configure time option to override our default.
 426 AC_ARG_ENABLE(compressed_debug_sections,
 427 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 428                 [Enable compressed debug sections for gas, gold or ld by
 429                  default])],
 430 [
 431   if test x"$enable_compressed_debug_sections" = xyes; then
 432     AC_MSG_ERROR([no program with compressed debug sections specified])
 433   fi
 434 ], [enable_compressed_debug_sections=])
 435
 436 # Select default compression algorithm.
 437 AC_ARG_ENABLE(default_compressed_debug_sections_algorithm,
 438 [AS_HELP_STRING([--enable-default-compressed-debug-sections-algorithm={zlib,zstd}],
 439                 [Default compression algorithm for --enable-compressed-debug-sections.])],
 440 [], [default_compressed_debug_sections_algorithm=])
 441
 442 # Configure extra directories which are host specific
 443
 444 case "${host}" in
 445   *-cygwin*)
 446     configdirs="$configdirs libtermcap" ;;
 447 esac
 448
 449 # A target can indicate whether a language isn't supported for some reason.
 450 # Only spaces may be used in this macro; not newlines or tabs.
 451 unsupported_languages=
 452
 453 # Remove more programs from consideration, based on the host or
 454 # target this usually means that a port of the program doesn't
 455 # exist yet.
 456
 457 case "${host}" in
 458   i[[3456789]]86-*-msdosdjgpp*)
 459     noconfigdirs="$noconfigdirs tcl tk itcl"
 460     ;;
 461 esac
 462
 463 # Default to --disable-year2038 until we can handle differences between
 464 # projects that use gnulib (which understands year 2038) and projects that
 465 # do not (like BFD).
 466 AC_ARG_ENABLE(year2038,
 467 AS_HELP_STRING([--enable-year2038],
 468   [enable support for timestamps past the year 2038]),
 469 ENABLE_YEAR2038=$enableval,
 470 ENABLE_YEAR2038=no)
 471 enable_year2038=
 472 if test "${ENABLE_YEAR2038}" = "no" ; then
 473   enable_year2038=no
 474 fi
 475
 476 AC_ARG_ENABLE(libquadmath,
 477 AS_HELP_STRING([--disable-libquadmath],
 478   [do not build libquadmath directory]),
 479 ENABLE_LIBQUADMATH=$enableval,
 480 ENABLE_LIBQUADMATH=yes)
 481 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 482   noconfigdirs="$noconfigdirs target-libquadmath"
 483 fi
 484
 485
 486 AC_ARG_ENABLE(libquadmath-support,
 487 AS_HELP_STRING([--disable-libquadmath-support],
 488   [disable libquadmath support for Fortran]),
 489 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 490 ENABLE_LIBQUADMATH_SUPPORT=yes)
 491 enable_libquadmath_support=
 492 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 493   enable_libquadmath_support=no
 494 fi
 495
 496
 497 AC_ARG_ENABLE(libada,
 498 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 499 ENABLE_LIBADA=$enableval,
 500 ENABLE_LIBADA=yes)
 501 if test "${ENABLE_LIBADA}" != "yes" ; then
 502   noconfigdirs="$noconfigdirs gnattools"
 503 fi
 504
 505 AC_ARG_ENABLE(libgm2,
 506 [AS_HELP_STRING([--enable-libgm2], [build libgm2 directory])],
 507 ENABLE_LIBGM2=$enableval,
 508 ENABLE_LIBGM2=no)
 509 if test "${ENABLE_LIBGM2}" != "yes" ; then
 510   noconfigdirs="$noconfigdirs gm2tools"
 511 fi
 512
 513 AC_ARG_ENABLE(libssp,
 514 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 515 ENABLE_LIBSSP=$enableval,
 516 ENABLE_LIBSSP=yes)
 517
 518 AC_ARG_ENABLE(libstdcxx,
 519 AS_HELP_STRING([--disable-libstdcxx],
 520   [do not build libstdc++-v3 directory]),
 521 ENABLE_LIBSTDCXX=$enableval,
 522 ENABLE_LIBSTDCXX=default)
 523 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 524   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 525 fi]
 526
 527 # Enable libgomp by default on hosted POSIX systems, and a few others.
 528 if test x$enable_libgomp = x ; then
 529     case "${target}" in
 530     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 531         ;;
 532     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 533         ;;
 534     *-*-solaris2* | *-*-hpux11*)
 535         ;;
 536     *-*-darwin* | *-*-aix*)
 537         ;;
 538     nvptx*-*-* | amdgcn*-*-*)
 539         ;;
 540     *)
 541         noconfigdirs="$noconfigdirs target-libgomp"
 542         ;;
 543     esac
 544 fi
 545
 546 # Disable libatomic on unsupported systems.
 547 if test -d ${srcdir}/libatomic; then
 548     if test x$enable_libatomic = x; then
 549         AC_MSG_CHECKING([for libatomic support])
 550         if (srcdir=${srcdir}/libatomic; \
 551                 . ${srcdir}/configure.tgt; \
 552                 test -n "$UNSUPPORTED")
 553         then
 554             AC_MSG_RESULT([no])
 555             noconfigdirs="$noconfigdirs target-libatomic"
 556         else
 557             AC_MSG_RESULT([yes])
 558         fi
 559     fi
 560 fi
 561
 562 # Disable libitm on unsupported systems.
 563 if test -d ${srcdir}/libitm; then
 564     if test x$enable_libitm = x; then
 565         AC_MSG_CHECKING([for libitm support])
 566         if (srcdir=${srcdir}/libitm; \
 567                 . ${srcdir}/configure.tgt; \
 568                 test -n "$UNSUPPORTED")
 569         then
 570             AC_MSG_RESULT([no])
 571             noconfigdirs="$noconfigdirs target-libitm"
 572         else
 573             AC_MSG_RESULT([yes])
 574         fi
 575     fi
 576 fi
 577
 578 # Disable libsanitizer on unsupported systems.
 579 if test -d ${srcdir}/libsanitizer; then
 580     if test x$enable_libsanitizer = x; then
 581         AC_MSG_CHECKING([for libsanitizer support])
 582         if (srcdir=${srcdir}/libsanitizer; \
 583                 . ${srcdir}/configure.tgt; \
 584                 test -n "$UNSUPPORTED")
 585         then
 586             AC_MSG_RESULT([no])
 587             noconfigdirs="$noconfigdirs target-libsanitizer"
 588         else
 589             AC_MSG_RESULT([yes])
 590         fi
 591     fi
 592 fi
 593
 594 # Disable libvtv on unsupported systems.
 595 if test -d ${srcdir}/libvtv; then
 596     if test x$enable_libvtv = x; then
 597         AC_MSG_CHECKING([for libvtv support])
 598         if (srcdir=${srcdir}/libvtv; \
 599                 . ${srcdir}/configure.tgt; \
 600                 test "$VTV_SUPPORTED" != "yes")
 601         then
 602             AC_MSG_RESULT([no])
 603             noconfigdirs="$noconfigdirs target-libvtv"
 604         else
 605             AC_MSG_RESULT([yes])
 606         fi
 607     fi
 608 fi
 609
 610 # Disable libquadmath for some systems.
 611 case "${target}" in
 612   avr-*-*)
 613     noconfigdirs="$noconfigdirs target-libquadmath"
 614     ;;
 615   # libquadmath is unused on AIX and libquadmath build process use of
 616   # LD_LIBRARY_PATH can break AIX bootstrap.
 617   powerpc-*-aix* | rs6000-*-aix*)
 618     noconfigdirs="$noconfigdirs target-libquadmath"
 619     ;;
 620 esac
 621
 622 # Disable libssp for some systems.
 623 case "${target}" in
 624   avr-*-*)
 625     # No hosted I/O support.
 626     noconfigdirs="$noconfigdirs target-libssp"
 627     ;;
 628   bpf-*-*)
 629     noconfigdirs="$noconfigdirs target-libssp"
 630     ;;
 631   powerpc-*-aix* | rs6000-*-aix*)
 632     noconfigdirs="$noconfigdirs target-libssp"
 633     ;;
 634   pru-*-*)
 635     # No hosted I/O support.
 636     noconfigdirs="$noconfigdirs target-libssp"
 637     ;;
 638   rl78-*-*)
 639     # libssp uses a misaligned load to trigger a fault, but the RL78
 640     # doesn't fault for those - instead, it gives a build-time error
 641     # for explicit misaligned loads.
 642     noconfigdirs="$noconfigdirs target-libssp"
 643     ;;
 644   visium-*-*)
 645     # No hosted I/O support.
 646     noconfigdirs="$noconfigdirs target-libssp"
 647     ;;
 648 esac
 649
 650 # Disable libstdc++-v3 for some systems.
 651 # Allow user to override this if they pass --enable-libstdcxx
 652 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 653   case "${target}" in
 654     *-*-vxworks*)
 655       # VxWorks uses the Dinkumware C++ library.
 656       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 657       ;;
 658     amdgcn*-*-*)
 659       # Not ported/fails to build when using newlib.
 660       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 661       ;;
 662     arm*-wince-pe*)
 663       # the C++ libraries don't build on top of CE's C libraries
 664       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 665       ;;
 666     avr-*-*)
 667       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 668       ;;
 669     bpf-*-*)
 670       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 671       ;;
 672     ft32-*-*)
 673       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 674       ;;
 675   esac
 676 fi
 677
 678 # Disable C++ on systems where it is known to not work.
 679 # For testing, you can override this with --enable-languages=c++.
 680 case ,${enable_languages}, in
 681   *,c++,*)
 682     ;;
 683   *)
 684       case "${target}" in
 685         bpf-*-*)
 686           unsupported_languages="$unsupported_languages c++"
 687           ;;
 688       esac
 689       ;;
 690 esac
 691
 692 # Disable Objc on systems where it is known to not work.
 693 # For testing, you can override this with --enable-languages=objc.
 694 case ,${enable_languages}, in
 695   *,objc,*)
 696     ;;
 697   *)
 698       case "${target}" in
 699         bpf-*-*)
 700           unsupported_languages="$unsupported_languages objc"
 701           ;;
 702       esac
 703       ;;
 704 esac
 705
 706 # Disable D on systems where it is known to not work.
 707 # For testing, you can override this with --enable-languages=d.
 708 case ,${enable_languages}, in
 709   *,d,*)
 710     ;;
 711   *)
 712     case "${target}" in
 713       bpf-*-*)
 714         unsupported_languages="$unsupported_languages d"
 715         ;;
 716     esac
 717     ;;
 718 esac
 719
 720 # Disable libphobos on unsupported systems.
 721 # For testing, you can override this with --enable-libphobos.
 722 if test -d ${srcdir}/libphobos; then
 723     if test x$enable_libphobos = x; then
 724         AC_MSG_CHECKING([for libphobos support])
 725         if (srcdir=${srcdir}/libphobos; \
 726                 . ${srcdir}/configure.tgt; \
 727                 test "$LIBPHOBOS_SUPPORTED" != "yes")
 728         then
 729             AC_MSG_RESULT([no])
 730             noconfigdirs="$noconfigdirs target-libphobos"
 731         else
 732             AC_MSG_RESULT([yes])
 733         fi
 734     fi
 735 fi
 736
 737 # Disable Fortran for some systems.
 738 case "${target}" in
 739   mmix-*-*)
 740     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 741     unsupported_languages="$unsupported_languages fortran"
 742     ;;
 743   bpf-*-*)
 744     unsupported_languages="$unsupported_languages fortran"
 745     ;;
 746 esac
 747
 748 # Disable libffi for some systems.
 749 case "${target}" in
 750   powerpc-*-darwin*)
 751     ;;
 752   i[[3456789]]86-*-darwin*)
 753     ;;
 754   x86_64-*-darwin[[912]]*)
 755     ;;
 756   *-*-darwin*)
 757     noconfigdirs="$noconfigdirs target-libffi"
 758     ;;
 759   *-*-netware*)
 760     noconfigdirs="$noconfigdirs target-libffi"
 761     ;;
 762   *-*-phoenix*)
 763     noconfigdirs="$noconfigdirs target-libffi"
 764     ;;
 765   *-*-rtems*)
 766     noconfigdirs="$noconfigdirs target-libffi"
 767     ;;
 768   *-*-tpf*)
 769     noconfigdirs="$noconfigdirs target-libffi"
 770     ;;
 771   *-*-uclinux*)
 772     noconfigdirs="$noconfigdirs target-libffi"
 773     ;;
 774   *-*-vxworks*)
 775     noconfigdirs="$noconfigdirs target-libffi"
 776     ;;
 777   aarch64*-*-freebsd*)
 778     noconfigdirs="$noconfigdirs target-libffi"
 779     ;;
 780   alpha*-*-*vms*)
 781     noconfigdirs="$noconfigdirs target-libffi"
 782     ;;
 783   arm*-*-freebsd*)
 784     noconfigdirs="$noconfigdirs target-libffi"
 785     ;;
 786   arm-wince-pe)
 787     noconfigdirs="$noconfigdirs target-libffi"
 788     ;;
 789   arm*-*-symbianelf*)
 790     noconfigdirs="$noconfigdirs target-libffi"
 791     ;;
 792   bpf-*-*)
 793     noconfigdirs="$noconfigdirs target-libffi"
 794     ;;
 795   cris-*-* | crisv32-*-*)
 796     case "${target}" in
 797       *-*-linux*)
 798         ;;
 799       *) # See PR46792 regarding target-libffi.
 800         noconfigdirs="$noconfigdirs target-libffi";;
 801     esac
 802     ;;
 803   hppa*64*-*-hpux*)
 804     noconfigdirs="$noconfigdirs target-libffi"
 805     ;;
 806   hppa*-hp-hpux11*)
 807     ;;
 808   hppa*-*-hpux*)
 809     noconfigdirs="$noconfigdirs target-libffi"
 810     ;;
 811   ia64*-*-*vms*)
 812     noconfigdirs="$noconfigdirs target-libffi"
 813     ;;
 814   i[[3456789]]86-w64-mingw*)
 815     noconfigdirs="$noconfigdirs target-libffi"
 816     ;;
 817   i[[3456789]]86-*-mingw*)
 818     noconfigdirs="$noconfigdirs target-libffi"
 819     ;;
 820   x86_64-*-mingw*)
 821     noconfigdirs="$noconfigdirs target-libffi"
 822     ;;
 823   mmix-*-*)
 824     noconfigdirs="$noconfigdirs target-libffi"
 825     ;;
 826   powerpc-*-aix*)
 827     ;;
 828   rs6000-*-aix*)
 829     ;;
 830   ft32-*-*)
 831     noconfigdirs="$noconfigdirs target-libffi"
 832     ;;
 833   *-*-lynxos*)
 834     noconfigdirs="$noconfigdirs target-libffi"
 835     ;;
 836 esac
 837
 838 # Disable the go frontend on systems where it is known to not work. Please keep
 839 # this in sync with contrib/config-list.mk.
 840 case "${target}" in
 841 *-*-darwin* | *-*-cygwin* | *-*-mingw* | bpf-* )
 842     unsupported_languages="$unsupported_languages go"
 843     ;;
 844 esac
 845
 846 # Only allow gdbserver on some systems.
 847 if test -d ${srcdir}/gdbserver; then
 848     if test x$enable_gdbserver = x; then
 849         AC_MSG_CHECKING([for gdbserver support])
 850         if (srcdir=${srcdir}/gdbserver; \
 851                 . ${srcdir}/configure.srv; \
 852                 test -n "$UNSUPPORTED")
 853         then
 854             AC_MSG_RESULT([no])
 855             noconfigdirs="$noconfigdirs gdbserver"
 856         else
 857             AC_MSG_RESULT([yes])
 858         fi
 859     fi
 860 fi
 861
 862 # Disable libgo for some systems where it is known to not work.
 863 # For testing, you can easily override this with --enable-libgo.
 864 if test x$enable_libgo = x; then
 865     case "${target}" in
 866     *-*-darwin*)
 867         # PR 46986
 868         noconfigdirs="$noconfigdirs target-libgo"
 869         ;;
 870     *-*-cygwin* | *-*-mingw*)
 871         noconfigdirs="$noconfigdirs target-libgo"
 872         ;;
 873     bpf-*-*)
 874         noconfigdirs="$noconfigdirs target-libgo"
 875         ;;
 876     esac
 877 fi
 878
 879 # Default libgloss CPU subdirectory.
 880 libgloss_dir="$target_cpu"
 881
 882 case "${target}" in
 883   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 884     libgloss_dir=wince
 885     ;;
 886   aarch64*-*-* )
 887     libgloss_dir=aarch64
 888     ;;
 889   arm*-*-*)
 890     libgloss_dir=arm
 891     ;;
 892   cris-*-* | crisv32-*-*)
 893     libgloss_dir=cris
 894     ;;
 895   hppa*-*-*)
 896     libgloss_dir=pa
 897     ;;
 898   i[[3456789]]86-*-*)
 899     libgloss_dir=i386
 900     ;;
 901   loongarch*-*-*)
 902     libgloss_dir=loongarch
 903     ;;
 904   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 905     libgloss_dir=m68hc11
 906     ;;
 907   m68*-*-* | fido-*-*)
 908     libgloss_dir=m68k
 909     ;;
 910   mips*-*-*)
 911     libgloss_dir=mips
 912     ;;
 913   powerpc*-*-*)
 914     libgloss_dir=rs6000
 915     ;;
 916   pru-*-*)
 917     libgloss_dir=pru
 918     ;;
 919   sparc*-*-*)
 920     libgloss_dir=sparc
 921     ;;
 922 esac
 923
 924 # Disable newlib and libgloss for various target OSes.
 925 case "${target}" in
 926   alpha*-dec-osf*)
 927     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 928     ;;
 929   i[[3456789]]86-*-linux*)
 930     # This section makes it possible to build newlib natively on linux.
 931     # If we are using a cross compiler then don't configure newlib.
 932     if test x${is_cross_compiler} != xno ; then
 933       noconfigdirs="$noconfigdirs target-newlib"
 934     fi
 935     noconfigdirs="$noconfigdirs target-libgloss"
 936     # If we are not using a cross compiler, do configure newlib.
 937     # Note however, that newlib will only be configured in this situation
 938     # if the --with-newlib option has been given, because otherwise
 939     # 'target-newlib' will appear in skipdirs.
 940     ;;
 941   i[[3456789]]86-*-rdos*)
 942     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 943     ;;
 944   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 945     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 946     ;;
 947   sparc-*-sunos4*)
 948     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 949     ;;
 950   bpf-*-*)
 951     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 952     ;;
 953   *-*-aix*)
 954     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 955     ;;
 956   *-*-beos*)
 957     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 958     ;;
 959   *-*-chorusos)
 960     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 961     ;;
 962   *-*-dragonfly*)
 963     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 964     ;;
 965   *-*-freebsd*)
 966     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 967     ;;
 968   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 969     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 970     ;;
 971   *-*-lynxos*)
 972     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 973     ;;
 974   *-*-mingw*)
 975     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 976     ;;
 977   *-*-netbsd*)
 978     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 979     ;;
 980   *-*-netware*)
 981     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 982     ;;
 983   *-*-tpf*)
 984     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 985     ;;
 986   *-*-uclinux*)
 987     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 988     ;;
 989   *-*-vxworks*)
 990     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 991     ;;
 992 esac
 993
 994 case "${target}" in
 995   *-*-chorusos)
 996     ;;
 997   aarch64-*-darwin*)
 998     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 999     noconfigdirs="$noconfigdirs sim target-rda"
1000     ;;
1001   amdgcn*-*-*)
1002     ;;
1003   arm-*-darwin*)
1004     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1005     noconfigdirs="$noconfigdirs sim target-rda"
1006     ;;
1007   powerpc-*-darwin*)
1008     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1009     noconfigdirs="$noconfigdirs sim target-rda"
1010     ;;
1011   i[[3456789]]86-*-darwin*)
1012     noconfigdirs="$noconfigdirs ld gprof"
1013     noconfigdirs="$noconfigdirs sim target-rda"
1014     ;;
1015   x86_64-*-darwin[[912]]*)
1016     noconfigdirs="$noconfigdirs ld gas gprof"
1017     noconfigdirs="$noconfigdirs sim target-rda"
1018     ;;
1019   *-*-darwin*)
1020     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1021     noconfigdirs="$noconfigdirs sim target-rda"
1022     ;;
1023   *-*-dragonfly*)
1024     ;;
1025   *-*-freebsd*)
1026     if test "x$with_gmp" = x \
1027         && ! test -d ${srcdir}/gmp \
1028         && test -f /usr/local/include/gmp.h; then
1029       with_gmp=/usr/local
1030     fi
1031     ;;
1032   *-*-kaos*)
1033     # Remove unsupported stuff on all kaOS configurations.
1034     noconfigdirs="$noconfigdirs target-libgloss"
1035     ;;
1036   *-*-netbsd*)
1037     ;;
1038   *-*-netware*)
1039     ;;
1040   *-*-phoenix*)
1041     noconfigdirs="$noconfigdirs target-libgloss"
1042     ;;
1043   *-*-rtems*)
1044     noconfigdirs="$noconfigdirs target-libgloss"
1045     ;;
1046     # The tpf target doesn't support gdb yet.
1047   *-*-tpf*)
1048     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
1049     ;;
1050   *-*-uclinux*)
1051     noconfigdirs="$noconfigdirs target-rda"
1052     ;;
1053   *-*-vxworks*)
1054     ;;
1055   alpha*-dec-osf*)
1056     # ld works, but does not support shared libraries.
1057     # gas doesn't generate exception information.
1058     noconfigdirs="$noconfigdirs gas ld"
1059     ;;
1060   alpha*-*-*vms*)
1061     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1062     ;;
1063   alpha*-*-*)
1064     # newlib is not 64 bit ready
1065     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1066     ;;
1067   bpf-*-*)
1068     noconfigdirs="$noconfigdirs target-libobjc target-libbacktrace"
1069     ;;
1070   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1071     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1072     ;;
1073   arc*-*-*)
1074     noconfigdirs="$noconfigdirs sim"
1075     ;;
1076   arm-*-pe*)
1077     noconfigdirs="$noconfigdirs target-libgloss"
1078     ;;
1079   arm-*-riscix*)
1080     noconfigdirs="$noconfigdirs ld target-libgloss"
1081     ;;
1082   avr-*-*)
1083     if test x${with_avrlibc} != xno; then
1084       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1085     fi
1086     ;;
1087   c4x-*-* | tic4x-*-*)
1088     noconfigdirs="$noconfigdirs target-libgloss"
1089     ;;
1090   tic54x-*-*)
1091     noconfigdirs="$noconfigdirs target-libgloss gdb"
1092     ;;
1093   d10v-*-*)
1094     noconfigdirs="$noconfigdirs target-libgloss"
1095     ;;
1096   d30v-*-*)
1097     noconfigdirs="$noconfigdirs gdb"
1098     ;;
1099   fr30-*-elf*)
1100     noconfigdirs="$noconfigdirs gdb"
1101     ;;
1102   ft32-*-*)
1103     noconfigdirs="$noconfigdirs target-rda gprof"
1104     ;;
1105   moxie-*-*)
1106     noconfigdirs="$noconfigdirs"
1107     ;;
1108   h8300*-*-*)
1109     noconfigdirs="$noconfigdirs target-libgloss"
1110     ;;
1111   h8500-*-*)
1112     noconfigdirs="$noconfigdirs target-libgloss"
1113     ;;
1114   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1115     ;;
1116   hppa*64*-*-hpux*)
1117     noconfigdirs="$noconfigdirs gdb"
1118     ;;
1119   hppa*-*-hpux11*)
1120     noconfigdirs="$noconfigdirs gdb ld"
1121     ;;
1122   hppa*64*-*-linux*)
1123     ;;
1124   hppa*-*-linux*)
1125     ;;
1126   hppa*-*-*elf* | \
1127   hppa*-*-lites* | \
1128   hppa*-*-openbsd* | \
1129   hppa*64*-*-*)
1130     ;;
1131   hppa*-*-pro*)
1132     ;;
1133   hppa*-*-*)
1134     noconfigdirs="$noconfigdirs ld"
1135     ;;
1136   i960-*-*)
1137     noconfigdirs="$noconfigdirs gdb"
1138     ;;
1139   ia64*-*-elf*)
1140     # No gdb support yet.
1141     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1142     ;;
1143   ia64*-**-hpux*)
1144     # No ld support yet.
1145     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1146     ;;
1147   ia64*-*-*vms*)
1148     # No ld support yet.
1149     noconfigdirs="$noconfigdirs libgui itcl ld"
1150     ;;
1151   i[[3456789]]86-w64-mingw*)
1152     ;;
1153   i[[3456789]]86-*-mingw*)
1154     target_configdirs="$target_configdirs target-winsup"
1155     ;;
1156   *-*-cygwin*)
1157     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1158     noconfigdirs="$noconfigdirs target-libgloss"
1159     # always build newlib if winsup directory is present.
1160     if test -d "$srcdir/winsup/cygwin"; then
1161       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1162     elif test -d "$srcdir/newlib"; then
1163       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1164     fi
1165     ;;
1166   i[[3456789]]86-*-pe)
1167     noconfigdirs="$noconfigdirs target-libgloss"
1168     ;;
1169   i[[3456789]]86-*-sco3.2v5*)
1170     # The linker does not yet know about weak symbols in COFF,
1171     # and is not configured to handle mixed ELF and COFF.
1172     noconfigdirs="$noconfigdirs ld target-libgloss"
1173     ;;
1174   i[[3456789]]86-*-sco*)
1175     noconfigdirs="$noconfigdirs gprof target-libgloss"
1176     ;;
1177   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1178     noconfigdirs="$noconfigdirs target-libgloss"
1179     ;;
1180   i[[3456789]]86-*-sysv4*)
1181     noconfigdirs="$noconfigdirs target-libgloss"
1182     ;;
1183   i[[3456789]]86-*-beos*)
1184     noconfigdirs="$noconfigdirs gdb"
1185     ;;
1186   i[[3456789]]86-*-rdos*)
1187     noconfigdirs="$noconfigdirs gdb"
1188     ;;
1189   mmix-*-*)
1190     noconfigdirs="$noconfigdirs gdb"
1191     ;;
1192   mt-*-*)
1193     noconfigdirs="$noconfigdirs sim"
1194     ;;
1195   nfp-*-*)
1196     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1197     noconfigdirs="$noconfigdirs $target_libraries"
1198     ;;
1199   pdp11-*-*)
1200     noconfigdirs="$noconfigdirs gdb gprof"
1201     ;;
1202   powerpc-*-aix*)
1203     # copied from rs6000-*-* entry
1204     noconfigdirs="$noconfigdirs gprof"
1205     ;;
1206   powerpc*-*-winnt* | powerpc*-*-pe*)
1207     target_configdirs="$target_configdirs target-winsup"
1208     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1209     # always build newlib.
1210     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1211     ;;
1212     # This is temporary until we can link against shared libraries
1213   powerpcle-*-solaris*)
1214     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1215     ;;
1216   powerpc-*-beos*)
1217     noconfigdirs="$noconfigdirs gdb"
1218     ;;
1219   rs6000-*-lynxos*)
1220     noconfigdirs="$noconfigdirs gprof"
1221     ;;
1222   rs6000-*-aix*)
1223     noconfigdirs="$noconfigdirs gprof"
1224     ;;
1225   rs6000-*-*)
1226     noconfigdirs="$noconfigdirs gprof"
1227     ;;
1228   m68k-apollo-*)
1229     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1230     ;;
1231   microblaze*)
1232     noconfigdirs="$noconfigdirs gprof"
1233     ;;
1234   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1235     if test x$with_newlib = xyes; then
1236       noconfigdirs="$noconfigdirs gprof"
1237     fi
1238     ;;
1239   mips*-*-irix5*)
1240     noconfigdirs="$noconfigdirs gprof target-libgloss"
1241     ;;
1242   mips*-*-irix6*)
1243     noconfigdirs="$noconfigdirs gprof target-libgloss"
1244     ;;
1245   mips*-*-bsd*)
1246     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1247     ;;
1248   mips*-*-linux*)
1249     ;;
1250   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1251   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1252     noconfigdirs="$noconfigdirs ld gas gprof"
1253     ;;
1254   mips*-*-*)
1255     noconfigdirs="$noconfigdirs gprof"
1256     ;;
1257   nvptx*-*-*)
1258     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1259     ;;
1260   sh-*-*)
1261     case "${target}" in
1262       sh*-*-elf)
1263          ;;
1264       *)
1265          noconfigdirs="$noconfigdirs target-libgloss" ;;
1266     esac
1267     ;;
1268   sparc-*-sunos4*)
1269     if test x${is_cross_compiler} = xno ; then
1270            use_gnu_ld=no
1271     fi
1272     ;;
1273   tic6x-*-*)
1274     noconfigdirs="$noconfigdirs sim"
1275     ;;
1276   tilepro*-*-* | tilegx*-*-*)
1277     noconfigdirs="$noconfigdirs sim"
1278     ;;
1279   v810-*-*)
1280     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1281     ;;
1282   vax-*-*)
1283     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1284     ;;
1285   wasm32-*-*)
1286     noconfigdirs="$noconfigdirs ld"
1287     ;;
1288   loongarch*-*-linux*)
1289     ;;
1290   loongarch*-*-*)
1291     noconfigdirs="$noconfigdirs gprof"
1292     ;;
1293 esac
1294
1295 # If we aren't building newlib, then don't build libgloss, since libgloss
1296 # depends upon some newlib header files.
1297 case "${noconfigdirs}" in
1298   *target-libgloss*) ;;
1299   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1300 esac
1301
1302 # Work in distributions that contain no compiler tools, like Autoconf.
1303 host_makefile_frag=/dev/null
1304 if test -d ${srcdir}/config ; then
1305 case "${host}" in
1306   i[[3456789]]86-*-msdosdjgpp*)
1307     host_makefile_frag="config/mh-djgpp"
1308     ;;
1309   *-cygwin*)
1310     ACX_CHECK_CYGWIN_CAT_WORKS
1311     host_makefile_frag="config/mh-cygwin"
1312     ;;
1313   *-mingw*)
1314     host_makefile_frag="config/mh-mingw"
1315     ;;
1316   alpha*-linux*)
1317     host_makefile_frag="config/mh-alpha-linux"
1318     ;;
1319   hppa*-hp-hpux*)
1320     host_makefile_frag="config/mh-pa"
1321     ;;
1322   hppa*-*)
1323     host_makefile_frag="config/mh-pa"
1324     ;;
1325   i?86-*-darwin[[89]]* | i?86-*-darwin1[[0-7]]* | powerpc*-*-darwin*)
1326     host_makefile_frag="config/mh-darwin"
1327     ;;
1328   powerpc-*-aix*)
1329     host_makefile_frag="config/mh-ppc-aix"
1330     ;;
1331   rs6000-*-aix*)
1332     host_makefile_frag="config/mh-ppc-aix"
1333     ;;
1334 esac
1335 fi
1336
1337 if test "${build}" != "${host}" ; then
1338   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1339   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1340   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1341   CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CC_FOR_BUILD) -E}"
1342   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1343   DSYMUTIL_FOR_BUILD=${DSYMUTIL_FOR_BUILD-dsymutil}
1344   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1345   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1346   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1347   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1348   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1349   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1350   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1351   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1352   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1353 else
1354   AR_FOR_BUILD="\$(AR)"
1355   AS_FOR_BUILD="\$(AS)"
1356   CC_FOR_BUILD="\$(CC)"
1357   CXX_FOR_BUILD="\$(CXX)"
1358   DSYMUTIL_FOR_BUILD="\$(DSYMUTIL)"
1359   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1360   GOC_FOR_BUILD="\$(GOC)"
1361   GDC_FOR_BUILD="\$(GDC)"
1362   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1363   LD_FOR_BUILD="\$(LD)"
1364   NM_FOR_BUILD="\$(NM)"
1365   RANLIB_FOR_BUILD="\$(RANLIB)"
1366   WINDRES_FOR_BUILD="\$(WINDRES)"
1367   WINDMC_FOR_BUILD="\$(WINDMC)"
1368 fi
1369
1370 AC_PROG_CC_C99
1371 AC_PROG_CXX
1372
1373 # We must set the default linker to the linker used by gcc for the correct
1374 # operation of libtool.  If LD is not defined and we are using gcc, try to
1375 # set the LD default to the ld used by gcc.
1376 if test -z "$LD"; then
1377   if test "$GCC" = yes; then
1378     case $build in
1379     *-*-mingw*)
1380       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1381     *)
1382       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1383     esac
1384     case $gcc_prog_ld in
1385     # Accept absolute paths.
1386     [[\\/]* | [A-Za-z]:[\\/]*)]
1387       LD="$gcc_prog_ld" ;;
1388     esac
1389   fi
1390 fi
1391
1392 # Check whether -static-libstdc++ -static-libgcc is supported.
1393 have_static_libs=no
1394 if test "$GCC" = yes; then
1395   saved_LDFLAGS="$LDFLAGS"
1396
1397   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1398   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1399   AC_LANG_PUSH(C++)
1400   AC_LINK_IFELSE([AC_LANG_SOURCE([
1401 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1402 #error -static-libstdc++ not implemented
1403 #endif
1404 int main() {}])],
1405     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1406     [AC_MSG_RESULT([no])])
1407   AC_LANG_POP(C++)
1408
1409   LDFLAGS="$saved_LDFLAGS"
1410 fi
1411
1412 ACX_PROG_GNAT
1413 ACX_PROG_GDC
1414 ACX_PROG_CARGO
1415 ACX_PROG_CMP_IGNORE_INITIAL
1416
1417 AC_ARG_ENABLE([bootstrap],
1418 [AS_HELP_STRING([--enable-bootstrap],
1419                 [enable bootstrapping @<:@yes if native build@:>@])],,
1420 enable_bootstrap=default)
1421
1422 # Issue errors and warnings for invalid/strange bootstrap combinations.
1423 if test -r $srcdir/gcc/configure; then
1424   have_compiler=yes
1425 else
1426   have_compiler=no
1427 fi
1428
1429 case "$have_compiler:$host:$target:$enable_bootstrap" in
1430   *:*:*:no) ;;
1431
1432   # Default behavior.  Enable bootstrap if we have a compiler
1433   # and we are in a native configuration.
1434   yes:$build:$build:default)
1435     enable_bootstrap=yes ;;
1436
1437   *:*:*:default)
1438     enable_bootstrap=no ;;
1439
1440   # We have a compiler and we are in a native configuration, bootstrap is ok
1441   yes:$build:$build:yes)
1442     ;;
1443
1444   # Other configurations, but we have a compiler.  Assume the user knows
1445   # what he's doing.
1446   yes:*:*:yes)
1447     AC_MSG_WARN([trying to bootstrap a cross compiler])
1448     ;;
1449
1450   # No compiler: if they passed --enable-bootstrap explicitly, fail
1451   no:*:*:yes)
1452     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1453
1454   # Fail if wrong command line
1455   *)
1456     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1457     ;;
1458 esac
1459
1460 # When bootstrapping with GCC, build stage 1 in C++11 mode to ensure that a
1461 # C++11 compiler can still start the bootstrap.  Otherwise, if building GCC,
1462 # require C++11 (or higher).
1463 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1464   CXX="$CXX -std=c++11"
1465 elif test "$have_compiler" = yes; then
1466   AX_CXX_COMPILE_STDCXX(11)
1467
1468   if test "${build}" != "${host}"; then
1469     AX_CXX_COMPILE_STDCXX(11, [], [], [_FOR_BUILD])
1470   fi
1471 fi
1472
1473 AC_ARG_ENABLE([pgo-build],
1474 [AS_HELP_STRING([--enable-pgo-build[[=lto]]],
1475                 [enable the PGO build])],
1476 [enable_pgo_build=$enableval],
1477 [enable_pgo_build=no])
1478
1479 # Issue errors and warnings for invalid/strange PGO build combinations.
1480 case "$have_compiler:$host:$target:$enable_pgo_build" in
1481   *:*:*:no) ;;
1482
1483   # Allow the PGO build only if we aren't building a compiler and
1484   # we are in a native configuration.
1485   no:$build:$build:yes | no:$build:$build:lto) ;;
1486
1487   # Disallow the PGO bootstrap if we are building a compiler.
1488   yes:*:*:yes | yes:*:*:lto)
1489     AC_MSG_ERROR([cannot perform the PGO bootstrap when building a compiler]) ;;
1490
1491   *)
1492     AC_MSG_ERROR([invalid option for --enable-pgo-build])
1493     ;;
1494 esac
1495
1496 if test "$enable_pgo_build" != "no"; then
1497   AC_MSG_CHECKING([whether the compiler supports -fprofile-generate])
1498   old_CFLAGS="$CFLAGS"
1499   PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
1500   CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
1501   AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1502                     [PGO_BUILD_GEN_CFLAGS=])
1503   CFLAGS="$old_CFLAGS"
1504   if test -n "$PGO_BUILD_GEN_CFLAGS"; then
1505     AC_MSG_RESULT([yes])
1506     PGO_BUILD_USE_CFLAGS="-fprofile-use"
1507   else
1508     AC_MSG_RESULT([no])
1509     AC_MSG_ERROR([cannot perform the PGO build without -fprofile-generate])
1510   fi
1511
1512   if test "$enable_pgo_build" = "lto"; then
1513     AC_MSG_CHECKING([whether the compiler supports -flto=jobserver -ffat-lto-objects])
1514     old_CFLAGS="$CFLAGS"
1515     PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
1516     CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
1517     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1518                       [PGO_BUILD_LTO_CFLAGS=])
1519     CFLAGS="$old_CFLAGS"
1520     if test -n "$PGO_BUILD_LTO_CFLAGS"; then
1521       AC_MSG_RESULT([yes])
1522     else
1523       AC_MSG_RESULT([no])
1524       AC_MSG_WARN([LTO is disabled for the PGO build])
1525     fi
1526   fi
1527 fi
1528 AC_SUBST(PGO_BUILD_GEN_CFLAGS)
1529 AC_SUBST(PGO_BUILD_USE_CFLAGS)
1530 AC_SUBST(PGO_BUILD_LTO_CFLAGS)
1531
1532 # Used for setting $lt_cv_objdir
1533 _LT_CHECK_OBJDIR
1534
1535 # Check for GMP, MPFR and MPC
1536 require_gmp=no
1537 require_mpc=no
1538 if test -d ${srcdir}/gcc ; then
1539   require_gmp=yes
1540   require_mpc=yes
1541 fi
1542 if test -d ${srcdir}/gdb ; then
1543   if test "x$enable_gdb" != xno; then
1544    require_gmp=yes
1545   fi
1546 fi
1547
1548 gmplibs="-lmpfr -lgmp"
1549 if test x"$require_mpc" = "xyes" ; then
1550   gmplibs="-lmpc $gmplibs"
1551 fi
1552 gmpinc=
1553 have_gmp=no
1554
1555 # Specify a location for mpc
1556 # check for this first so it ends up on the link line before mpfr.
1557 AC_ARG_WITH(mpc,
1558 [AS_HELP_STRING([--with-mpc=PATH],
1559                 [specify prefix directory for installed MPC package.
1560                  Equivalent to --with-mpc-include=PATH/include
1561                  plus --with-mpc-lib=PATH/lib])])
1562 AC_ARG_WITH(mpc-include,
1563 [AS_HELP_STRING([--with-mpc-include=PATH],
1564                 [specify directory for installed MPC include files])])
1565 AC_ARG_WITH(mpc-lib,
1566 [AS_HELP_STRING([--with-mpc-lib=PATH],
1567                 [specify directory for the installed MPC library])])
1568
1569 if test "x$with_mpc" != x; then
1570   gmplibs="-L$with_mpc/lib $gmplibs"
1571   gmpinc="-I$with_mpc/include $gmpinc"
1572 fi
1573 if test "x$with_mpc_include" != x; then
1574   gmpinc="-I$with_mpc_include $gmpinc"
1575 fi
1576 if test "x$with_mpc_lib" != x; then
1577   gmplibs="-L$with_mpc_lib $gmplibs"
1578 fi
1579 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1580   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1581   gmpinc='-I$$s/mpc/src '"$gmpinc"
1582   # Do not test the mpc version.  Assume that it is sufficient, since
1583   # it is in the source tree, and the library has not been built yet
1584   # but it would be included on the link line in the version check below
1585   # hence making the test fail.
1586   have_gmp=yes
1587 fi
1588
1589 # Specify a location for mpfr
1590 # check for this first so it ends up on the link line before gmp.
1591 AC_ARG_WITH(mpfr,
1592 [AS_HELP_STRING([--with-mpfr=PATH],
1593                 [specify prefix directory for installed MPFR package.
1594                  Equivalent to --with-mpfr-include=PATH/include
1595                  plus --with-mpfr-lib=PATH/lib])])
1596 AC_ARG_WITH(mpfr-include,
1597 [AS_HELP_STRING([--with-mpfr-include=PATH],
1598                 [specify directory for installed MPFR include files])])
1599 AC_ARG_WITH(mpfr-lib,
1600 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1601                 [specify directory for the installed MPFR library])])
1602
1603 if test "x$with_mpfr" != x; then
1604   gmplibs="-L$with_mpfr/lib $gmplibs"
1605   gmpinc="-I$with_mpfr/include $gmpinc"
1606 fi
1607 if test "x$with_mpfr_include" != x; then
1608   gmpinc="-I$with_mpfr_include $gmpinc"
1609 fi
1610 if test "x$with_mpfr_lib" != x; then
1611   gmplibs="-L$with_mpfr_lib $gmplibs"
1612 fi
1613 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1614   # MPFR v3.1.0 moved the sources into a src sub-directory.
1615   if ! test -d ${srcdir}/mpfr/src; then
1616     AC_MSG_ERROR([dnl
1617 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1618   fi
1619   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1620   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1621   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1622   # Do not test the mpfr version.  Assume that it is sufficient, since
1623   # it is in the source tree, and the library has not been built yet
1624   # but it would be included on the link line in the version check below
1625   # hence making the test fail.
1626   have_gmp=yes
1627 fi
1628
1629 # Specify a location for gmp
1630 AC_ARG_WITH(gmp,
1631 [AS_HELP_STRING([--with-gmp=PATH],
1632                 [specify prefix directory for the installed GMP package.
1633                  Equivalent to --with-gmp-include=PATH/include
1634                  plus --with-gmp-lib=PATH/lib])])
1635 AC_ARG_WITH(gmp-include,
1636 [AS_HELP_STRING([--with-gmp-include=PATH],
1637                 [specify directory for installed GMP include files])])
1638 AC_ARG_WITH(gmp-lib,
1639 [AS_HELP_STRING([--with-gmp-lib=PATH],
1640                 [specify directory for the installed GMP library])])
1641
1642
1643 if test "x$with_gmp" != x; then
1644   gmplibs="-L$with_gmp/lib $gmplibs"
1645   gmpinc="-I$with_gmp/include $gmpinc"
1646 fi
1647 if test "x$with_gmp_include" != x; then
1648   gmpinc="-I$with_gmp_include $gmpinc"
1649 fi
1650 if test "x$with_gmp_lib" != x; then
1651   gmplibs="-L$with_gmp_lib $gmplibs"
1652 fi
1653 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1654   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1655   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1656   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1657   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1658   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1659   # Do not test the gmp version.  Assume that it is sufficient, since
1660   # it is in the source tree, and the library has not been built yet
1661   # but it would be included on the link line in the version check below
1662   # hence making the test fail.
1663   have_gmp=yes
1664 fi
1665
1666 if test "x$require_gmp" = xyes && test "x$have_gmp" = xno; then
1667   have_gmp=yes
1668   saved_CFLAGS="$CFLAGS"
1669   CFLAGS="$CFLAGS $gmpinc"
1670   # Check for the recommended and required versions of GMP.
1671   AC_MSG_CHECKING([for the correct version of gmp.h])
1672   AC_TRY_COMPILE([#include "gmp.h"],[
1673   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1674   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1675   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1676   choke me
1677   #endif
1678   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1679   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1680   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1681   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1682   choke me
1683   #endif
1684   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1685    [AC_MSG_RESULT([no]); have_gmp=no])
1686
1687   # If we have GMP, check the MPFR version.
1688   if test x"$have_gmp" = xyes; then
1689     # Check for the recommended and required versions of MPFR.
1690     AC_MSG_CHECKING([for the correct version of mpfr.h])
1691     AC_TRY_COMPILE([#include <gmp.h>
1692     #include <mpfr.h>],[
1693     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,0)
1694     choke me
1695     #endif
1696     ], [AC_TRY_COMPILE([#include <gmp.h>
1697     #include <mpfr.h>],[
1698     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,6)
1699     choke me
1700     #endif
1701     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1702      [AC_MSG_RESULT([no]); have_gmp=no])
1703   fi
1704
1705   # Check for the MPC header version.
1706   if test "x$require_mpc" = xyes && test x"$have_gmp" = xyes ; then
1707     # Check for the recommended and required versions of MPC.
1708     AC_MSG_CHECKING([for the correct version of mpc.h])
1709     AC_TRY_COMPILE([#include <mpc.h>],[
1710     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1711     choke me
1712     #endif
1713     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1714     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1715     choke me
1716     #endif
1717     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1718      [AC_MSG_RESULT([no]); have_gmp=no])
1719   fi
1720
1721   # Now check the MPFR library.
1722   if test x"$have_gmp" = xyes; then
1723     saved_LIBS="$LIBS"
1724     LIBS="$LIBS $gmplibs"
1725     AC_MSG_CHECKING([for the correct version of the gmp/mpfr libraries])
1726     AC_TRY_LINK([#include <mpfr.h>],[
1727     mpfr_t n;
1728     mpfr_t x;
1729     int t;
1730     mpfr_init (n);
1731     mpfr_init (x);
1732     mpfr_atan2 (n, n, x, MPFR_RNDN);
1733     mpfr_erfc (n, x, MPFR_RNDN);
1734     mpfr_subnormalize (x, t, MPFR_RNDN);
1735     mpfr_clear(n);
1736     mpfr_clear(x);
1737     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1738     LIBS="$saved_LIBS"
1739   fi
1740
1741   # Now check the MPC library
1742   if test "x$require_mpc" = xyes && test x"$have_gmp" = xyes; then
1743     saved_LIBS="$LIBS"
1744     LIBS="$LIBS $gmplibs"
1745     AC_MSG_CHECKING([for the correct version of the mpc libraries])
1746     AC_TRY_LINK([#include <mpc.h>],[
1747     mpc_t c;
1748     mpc_init2 (c, 53);
1749     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1750     mpc_cosh (c, c, MPC_RNDNN);
1751     mpc_pow (c, c, c, MPC_RNDNN);
1752     mpc_acosh (c, c, MPC_RNDNN);
1753     mpc_clear (c);
1754     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1755     LIBS="$saved_LIBS"
1756   fi
1757
1758   CFLAGS="$saved_CFLAGS"
1759
1760 # The library versions listed in the error message below should match
1761 # the HARD-minimums enforced above.
1762   if test x$have_gmp != xyes; then
1763     if test -d ${srcdir}/gcc ; then
1764       AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 3.1.0+ and MPC 0.8.0+.
1765 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1766 their locations.  Source code for these libraries can be found at
1767 their respective hosting sites as well as at
1768 https://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1769 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1770 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1771 make sure that you have installed both the libraries and the header
1772 files.  They may be located in separate packages.])
1773     else
1774       AC_MSG_ERROR([Building GDB requires GMP 4.2+, and MPFR 3.1.0+.
1775 Try the --with-gmp and/or --with-mpfr options to specify
1776 their locations.  If you obtained GMP and/or MPFR from a vendor
1777 distribution package, make sure that you have installed both the libraries
1778 and the header files.  They may be located in separate packages.])
1779     fi
1780   fi
1781 fi
1782
1783 # Flags needed for both GMP, MPFR and/or MPC.
1784 AC_SUBST(gmplibs)
1785 AC_SUBST(gmpinc)
1786 AC_SUBST(extra_mpfr_configure_flags)
1787 AC_SUBST(extra_mpc_gmp_configure_flags)
1788 AC_SUBST(extra_mpc_mpfr_configure_flags)
1789 AC_SUBST(extra_isl_gmp_configure_flags)
1790
1791 # Libraries to use for stage1 or when not bootstrapping.
1792 AC_ARG_WITH(stage1-libs,
1793 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1794 [if test "$withval" = "no" -o "$withval" = "yes"; then
1795    stage1_libs=
1796  else
1797    stage1_libs=$withval
1798  fi],
1799 [stage1_libs=])
1800 AC_SUBST(stage1_libs)
1801
1802 # Whether or not to use -static-libstdc++ and -static-libgcc.  The
1803 # default is yes if gcc is being built; no otherwise.  The reason for
1804 # this default is that gdb is sometimes linked against GNU Source
1805 # Highlight, which is a shared library that uses C++ exceptions.  In
1806 # this case, -static-libstdc++ will cause crashes.
1807 AC_ARG_WITH(static-standard-libraries,
1808 [AS_HELP_STRING([--with-static-standard-libraries],
1809                 [use -static-libstdc++ and -static-libgcc (default=auto)])],
1810 [], [with_static_standard_libraries=auto])
1811 if test "$with_static_standard_libraries" = auto; then
1812   with_static_standard_libraries=$have_compiler
1813 fi
1814
1815 # Linker flags to use for stage1 or when not bootstrapping.
1816 AC_ARG_WITH(stage1-ldflags,
1817 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1818 [if test "$withval" = "no" -o "$withval" = "yes"; then
1819    stage1_ldflags=
1820  else
1821    stage1_ldflags=$withval
1822  fi],
1823 [stage1_ldflags=
1824  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1825  # if supported.  But if the user explicitly specified the libraries to use,
1826  # trust that they are doing what they want.
1827  if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
1828      -a "$have_static_libs" = yes; then
1829    stage1_ldflags="-static-libstdc++ -static-libgcc"
1830  fi])
1831 AC_SUBST(stage1_ldflags)
1832
1833 # Libraries to use for stage2 and later builds.
1834 AC_ARG_WITH(boot-libs,
1835 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1836 [if test "$withval" = "no" -o "$withval" = "yes"; then
1837    poststage1_libs=
1838  else
1839    poststage1_libs=$withval
1840  fi],
1841 [poststage1_libs=])
1842 AC_SUBST(poststage1_libs)
1843
1844 # Linker flags to use for stage2 and later builds.
1845 AC_ARG_WITH(boot-ldflags,
1846 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1847                 [linker flags for stage2 and later])],
1848 [if test "$withval" = "no" -o "$withval" = "yes"; then
1849    poststage1_ldflags=
1850  else
1851    poststage1_ldflags=$withval
1852  fi],
1853 [poststage1_ldflags=
1854  # In stages 2 and 3, default to linking libstdc++ and libgcc
1855  # statically.  But if the user explicitly specified the libraries to
1856  # use, trust that they are doing what they want.
1857  if test "$poststage1_libs" = ""; then
1858    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1859  fi])
1860 case $target in
1861   *-darwin2* | *-darwin1[[56789]]*)
1862     # For these versions, we default to using embedded rpaths.
1863     if test "x$enable_darwin_at_rpath" != "xno"; then
1864       poststage1_ldflags="$poststage1_ldflags -nodefaultrpaths"
1865     fi
1866   ;;
1867   *-darwin*)
1868     # For these versions, we only use embedded rpaths on demand.
1869     if test "x$enable_darwin_at_rpath" = "xyes"; then
1870       poststage1_ldflags="$poststage1_ldflags -nodefaultrpaths"
1871     fi
1872   ;;
1873 esac
1874 AC_SUBST(poststage1_ldflags)
1875
1876 # GCC GRAPHITE dependency isl.
1877 # Basic setup is inlined here, actual checks are in config/isl.m4
1878
1879 AC_ARG_WITH(isl,
1880   [AS_HELP_STRING(
1881    [--with-isl=PATH],
1882    [Specify prefix directory for the installed isl package.
1883     Equivalent to --with-isl-include=PATH/include
1884     plus --with-isl-lib=PATH/lib])])
1885
1886 # Treat --without-isl as a request to disable
1887 # GRAPHITE support and skip all following checks.
1888 if test "x$with_isl" != "xno"; then
1889   # Check for isl
1890   dnl Provide configure switches and initialize islinc & isllibs
1891   dnl with user input.
1892   ISL_INIT_FLAGS
1893   dnl The versions of isl that work for Graphite
1894   ISL_CHECK_VERSION()
1895   dnl Only execute fail-action, if isl has been requested.
1896   ISL_IF_FAILED([
1897     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1898 fi
1899
1900 # If the isl check failed, disable builds of in-tree variant of isl
1901 if test "x$with_isl" = xno ||
1902    test "x$gcc_cv_isl" = xno; then
1903   noconfigdirs="$noconfigdirs isl"
1904   islinc=
1905 fi
1906
1907 AC_SUBST(isllibs)
1908 AC_SUBST(islinc)
1909
1910 # Check for LTO support.
1911 AC_ARG_ENABLE(lto,
1912 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1913 enable_lto=$enableval,
1914 enable_lto=yes; default_enable_lto=yes)
1915
1916 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1917   build_lto_plugin=yes
1918 ],[if test x"$default_enable_lto" = x"yes" ; then
1919     case $target in
1920       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1921       # On other non-ELF platforms, LTO has yet to be validated.
1922       *) enable_lto=no ;;
1923     esac
1924   else
1925   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1926   # It would also be nice to check the binutils support, but we don't
1927   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1928   # warn during gcc/ subconfigure; unless you're bootstrapping with
1929   # -flto it won't be needed until after installation anyway.
1930     case $target in
1931       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1932       *) if test x"$enable_lto" = x"yes"; then
1933         AC_MSG_ERROR([LTO support is not enabled for this target.])
1934         fi
1935       ;;
1936     esac
1937   fi
1938   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1939   # Build it unless LTO was explicitly disabled.
1940   case $target in
1941     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1942     *) ;;
1943   esac
1944 ])
1945
1946 AC_ARG_ENABLE(linker-plugin-configure-flags,
1947   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1948     [additional flags for configuring linker plugins @<:@none@:>@])],
1949   extra_linker_plugin_configure_flags=$enableval,
1950   extra_linker_plugin_configure_flags=)
1951 AC_SUBST(extra_linker_plugin_configure_flags)
1952 AC_ARG_ENABLE(linker-plugin-flags,
1953   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1954     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1955   extra_linker_plugin_flags=$enableval,
1956   extra_linker_plugin_flags=)
1957 AC_SUBST(extra_linker_plugin_flags)
1958
1959 # Handle --enable-host-pie
1960 # If host PIE executables are the default (or must be forced on) for some host,
1961 # we must pass that configuration to the gcc directory.
1962 gcc_host_pie=
1963 AC_ARG_ENABLE(host-pie,
1964 [AS_HELP_STRING([--enable-host-pie],
1965                 [build position independent host executables])],
1966 [host_pie=$enableval
1967  case $host in
1968    *-*-darwin2*)
1969      if test x$host_pie != xyes ; then
1970        # for Darwin20+ this is required.
1971        AC_MSG_WARN([PIE executables are required for the configured host, host-pie setting ignored.])
1972        host_pie=yes
1973        gcc_host_pie=--enable-host-pie
1974      fi ;;
1975   *) ;;
1976  esac],
1977 [case $host in
1978   *-*-darwin2*)
1979     # Default to PIE (mandatory for aarch64).
1980     host_pie=yes
1981     gcc_host_pie=--enable-host-pie
1982     ;;
1983   *) host_pie=no ;;
1984  esac])
1985
1986 AC_SUBST(host_pie)
1987 AC_SUBST(gcc_host_pie)
1988
1989 # Enable --enable-host-shared.
1990 # Checked early to determine whether jit is an 'all' language
1991 AC_ARG_ENABLE(host-shared,
1992 [AS_HELP_STRING([--enable-host-shared],
1993                 [build host code as shared libraries])],
1994 [host_shared=$enableval
1995  case $host in
1996    x86_64-*-darwin* | aarch64-*-darwin*)
1997      if test x$host_shared != xyes ; then
1998        # PIC is the default, and actually cannot be switched off.
1999        AC_MSG_WARN([PIC code is required for the configured host; host-shared setting ignored.])
2000        host_shared=yes
2001      fi ;;
2002    *-*-darwin*)
2003      if test x$host_pie = xyes -a x$host_shared != xyes ; then
2004        AC_MSG_WARN([PIC code is required for PIE host executables host-shared setting ignored.])
2005        host_shared=yes
2006      fi ;;
2007   *) ;;
2008  esac],
2009 [case $host in
2010   # 64B x86_64 and Aarch64 Darwin default to PIC.
2011   x86_64-*-darwin* | aarch64-*-darwin*) host_shared=yes ;;
2012   # 32B and powerpc64 Darwin must use PIC to link PIE exes.
2013   *-*-darwin*) host_shared=$host_pie ;;
2014   *) host_shared=no;;
2015  esac])
2016
2017 AC_SUBST(host_shared)
2018
2019 if test x$host_shared = xyes; then
2020   case $host in
2021     *-*-darwin*)
2022       # Since host shared is the default for 64b Darwin, and also enabled for
2023       # host_pie, ensure that we present the PIE flag when host_pie is active.
2024       if test x$host_pie = xyes; then
2025         PICFLAG=-fPIE
2026       fi
2027       ;;
2028     *)
2029       PICFLAG=-fPIC
2030       ;;
2031   esac
2032 elif test x$host_pie = xyes; then
2033   PICFLAG=-fPIE
2034 else
2035   PICFLAG=
2036 fi
2037
2038 AC_SUBST(PICFLAG)
2039
2040 # If we are building PIC/PIE host executables, and we are building dependent
2041 # libs (e.g. GMP) in-tree those libs need to be configured to generate PIC
2042 # code.
2043 host_libs_picflag=
2044 if test "$host_shared" = "yes" -o "$host_pie" = "yes"; then
2045 host_libs_picflag='--with-pic'
2046 fi
2047 AC_SUBST(host_libs_picflag)
2048
2049 # By default, C and C++ are the only stage 1 languages.
2050 stage1_languages=,c,
2051
2052 # Target libraries that we bootstrap.
2053 bootstrap_target_libs=,target-libgcc,
2054
2055 # Figure out what language subdirectories are present.
2056 # Look if the user specified --enable-languages="..."; if not, use
2057 # the environment variable $LANGUAGES if defined. $LANGUAGES might
2058 # go away some day.
2059 # NB:  embedded tabs in this IF block -- do not untabify
2060 if test -d ${srcdir}/gcc; then
2061   if test x"${enable_languages+set}" != xset; then
2062     if test x"${LANGUAGES+set}" = xset; then
2063       enable_languages="${LANGUAGES}"
2064         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
2065     else
2066       enable_languages=default
2067     fi
2068   else
2069     if test x"${enable_languages}" = x ||
2070        test x"${enable_languages}" = xyes;
2071        then
2072       echo configure.ac: --enable-languages needs at least one language argument 1>&2
2073       exit 1
2074     fi
2075   fi
2076   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
2077
2078   # 'f95' is the old name for the 'fortran' language. We issue a warning
2079   # and make the substitution.
2080   case ,${enable_languages}, in
2081     *,f95,*)
2082       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
2083       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
2084       ;;
2085   esac
2086
2087   # If bootstrapping, C++ must be enabled.
2088   case ",$enable_languages,:$enable_bootstrap" in
2089     *,c++,*:*) ;;
2090     *:yes)
2091       if test -f ${srcdir}/gcc/cp/config-lang.in; then
2092         enable_languages="${enable_languages},c++"
2093       else
2094         AC_MSG_ERROR([bootstrapping requires c++ sources])
2095       fi
2096       ;;
2097   esac
2098
2099   # First scan to see if an enabled language requires some other language.
2100   # We assume that a given config-lang.in will list all the language
2101   # front ends it requires, even if some are required indirectly.
2102   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2103     case ${lang_frag} in
2104       ..) ;;
2105       # The odd quoting in the next line works around
2106       # an apparent bug in bash 1.12 on linux.
2107       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2108       *)
2109         # From the config-lang.in, get $language, $lang_requires, and
2110         # $lang_requires_boot_languages.
2111         language=
2112         lang_requires=
2113         lang_requires_boot_languages=
2114         # set srcdir during sourcing lang_frag to the gcc dir.
2115         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
2116         # polutes this shell
2117         saved_srcdir=${srcdir}
2118         srcdir=${srcdir}/gcc . ${lang_frag}
2119         srcdir=${saved_srcdir}
2120         for other in ${lang_requires} ${lang_requires_boot_languages}; do
2121           case ,${enable_languages}, in
2122             *,$other,*) ;;
2123             *,default,*) ;;
2124             *,all,*) ;;
2125             *,$language,*)
2126               echo " \`$other' language required by \`$language'; enabling" 1>&2
2127               enable_languages="${enable_languages},${other}"
2128               ;;
2129           esac
2130         done
2131         for other in ${lang_requires_boot_languages} ; do
2132           if test "$other" != "c"; then
2133             case ,${enable_stage1_languages}, in
2134               *,$other,*) ;;
2135               *,default,*) ;;
2136               *,all,*) ;;
2137               *)
2138                 case ,${enable_languages}, in
2139                   *,$language,*)
2140                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
2141                     enable_stage1_languages="$enable_stage1_languages,${other}"
2142                     ;;
2143                 esac
2144                 ;;
2145             esac
2146           fi
2147         done
2148         ;;
2149     esac
2150   done
2151
2152   new_enable_languages=,c,
2153
2154   # If LTO is enabled, add the LTO front end.
2155   if test "$enable_lto" = "yes" ; then
2156     case ,${enable_languages}, in
2157       *,lto,*) ;;
2158       *) enable_languages="${enable_languages},lto" ;;
2159     esac
2160     if test "${build_lto_plugin}" = "yes" ; then
2161       configdirs="$configdirs lto-plugin"
2162     fi
2163   fi
2164
2165   # If we're building an offloading compiler, add the LTO front end.
2166   if test x"$enable_as_accelerator_for" != x ; then
2167     case ,${enable_languages}, in
2168       *,lto,*) ;;
2169       *) enable_languages="${enable_languages},lto" ;;
2170     esac
2171   fi
2172
2173   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
2174   potential_languages=,c,
2175
2176   enabled_target_libs=
2177   disabled_target_libs=
2178
2179   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2180     case ${lang_frag} in
2181       ..) ;;
2182       # The odd quoting in the next line works around
2183       # an apparent bug in bash 1.12 on linux.
2184       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2185       *)
2186         # From the config-lang.in, get $language, $target_libs,
2187         # $lang_dirs, $boot_language, and $build_by_default
2188         language=
2189         target_libs=
2190         lang_dirs=
2191         subdir_requires=
2192         boot_language=no
2193         build_by_default=yes
2194         # set srcdir during sourcing.  See above about save & restore
2195         saved_srcdir=${srcdir}
2196         srcdir=${srcdir}/gcc . ${lang_frag}
2197         srcdir=${saved_srcdir}
2198         if test x${language} = x; then
2199           echo "${lang_frag} doesn't set \$language." 1>&2
2200           exit 1
2201         fi
2202
2203         if test "$language" = "c++"; then
2204           boot_language=yes
2205         fi
2206
2207         add_this_lang=no
2208         # C is always enabled, so no need to add it again
2209         if test "$language" != "c"; then
2210           case ,${enable_languages}, in
2211             *,${language},*)
2212               # Language was explicitly selected; include it
2213               add_this_lang=yes
2214               ;;
2215             *,all,*)
2216               # All languages are enabled
2217               add_this_lang=all
2218               ;;
2219             *,default,*)
2220               # 'default' was selected, select it if it is a default language
2221               add_this_lang=${build_by_default}
2222               ;;
2223           esac
2224         fi
2225
2226         # Disable languages that need other directories if these aren't available.
2227         for i in $subdir_requires; do
2228           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2229           case ${add_this_lang} in
2230             yes)
2231               # Specifically requested language; tell them.
2232               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2233               ;;
2234             all)
2235               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2236               add_this_lang=unsupported
2237               ;;
2238             *)
2239               # Silently disable.
2240               add_this_lang=unsupported
2241               ;;
2242           esac
2243         done
2244
2245         # Disable Ada if no preexisting GNAT is available.
2246         case ${add_this_lang}:${language}:${have_gnat} in
2247           yes:ada:no)
2248             # Specifically requested language; tell them.
2249             AC_MSG_ERROR([GNAT is required to build $language])
2250             ;;
2251           all:ada:no)
2252             AC_MSG_WARN([GNAT is required to build $language])
2253             add_this_lang=unsupported
2254             ;;
2255           *:ada:no)
2256             # Silently disable.
2257             add_this_lang=unsupported
2258             ;;
2259         esac
2260
2261         # Disable D if no preexisting GDC is available.
2262         case ${add_this_lang}:${language}:${have_gdc} in
2263           yes:d:no)
2264             # Specifically requested language; tell them.
2265             AC_MSG_ERROR([GDC is required to build $language])
2266            ;;
2267           all:d:no)
2268             AC_MSG_WARN([GDC is required to build $language])
2269             add_this_lang=unsupported
2270             ;;
2271           *:d:no)
2272             # Silently disable.
2273             add_this_lang=unsupported
2274             ;;
2275         esac
2276
2277         # Disable jit if -enable-host-shared not specified
2278         # but not if building for Mingw. All code in Windows
2279         # is position independent code (PIC).
2280         case $target in
2281           *mingw*) ;;
2282           *)
2283           case ${add_this_lang}:${language}:${host_shared} in
2284             yes:jit:no)
2285                    # PR jit/64780: explicitly specify --enable-host-shared
2286             AC_MSG_ERROR([
2287 Enabling language "jit" requires --enable-host-shared.
2288
2289 --enable-host-shared typically slows the rest of the compiler down by
2290 a few %, so you must explicitly enable it.
2291
2292 If you want to build both the jit and the regular compiler, it is often
2293 best to do this via two separate configure/builds, in separate
2294 directories, to avoid imposing the performance cost of
2295 --enable-host-shared on the regular compiler.])
2296                     ;;
2297             all:jit:no)
2298               AC_MSG_WARN([--enable-host-shared required to build $language])
2299               add_this_lang=unsupported
2300               ;;
2301             *:jit:no)
2302               # Silently disable.
2303               add_this_lang=unsupported
2304               ;;
2305                 esac
2306           ;;
2307         esac
2308
2309         # Disable Rust if cargo is unavailable.
2310         case ${add_this_lang}:${language}:${have_cargo} in
2311           yes:rust:no)
2312             # Specifically requested language; tell them.
2313             AC_MSG_ERROR([cargo is required to build $language])
2314             ;;
2315           all:rust:no)
2316             AC_MSG_WARN([cargo is required to build $language])
2317             add_this_lang=unsupported
2318             ;;
2319           *:rust:no)
2320             # Silently disable.
2321             add_this_lang=unsupported
2322             ;;
2323         esac
2324
2325
2326         # Disable a language that is unsupported by the target.
2327         case "${add_this_lang}: $unsupported_languages " in
2328           no:*) ;;
2329           unsupported:*) ;;
2330           *:*" $language "*)
2331             AC_MSG_WARN([${language} not supported for this target])
2332             add_this_lang=unsupported
2333             ;;
2334         esac
2335
2336         case $add_this_lang in
2337           unsupported)
2338             # Remove language-dependent dirs.
2339             disabled_target_libs="$disabled_target_libs $target_libs"
2340             noconfigdirs="$noconfigdirs $lang_dirs"
2341             ;;
2342           no)
2343             # Remove language-dependent dirs; still show language as supported.
2344             disabled_target_libs="$disabled_target_libs $target_libs"
2345             noconfigdirs="$noconfigdirs $lang_dirs"
2346             potential_languages="${potential_languages}${language},"
2347             ;;
2348           all|yes)
2349             new_enable_languages="${new_enable_languages}${language},"
2350             potential_languages="${potential_languages}${language},"
2351             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2352             enabled_target_libs="$enabled_target_libs $target_libs"
2353             case "${boot_language}:,$enable_stage1_languages," in
2354               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2355                 # Add to (comma-separated) list of stage 1 languages.
2356                 case ",$stage1_languages," in
2357                   *,$language,* | ,yes, | ,all,) ;;
2358                   *) stage1_languages="${stage1_languages}${language}," ;;
2359                 esac
2360                 # We need to bootstrap any supporting libraries.
2361                 bootstrap_target_libs=`echo "${bootstrap_target_libs}${target_libs}," | sed "s/ /,/g"`
2362                 ;;
2363             esac
2364             ;;
2365         esac
2366         ;;
2367     esac
2368   done
2369
2370   # Add target libraries which are only needed for disabled languages
2371   # to noconfigdirs.
2372   if test -n "$disabled_target_libs"; then
2373     for dir in $disabled_target_libs; do
2374       case " $enabled_target_libs " in
2375       *" ${dir} "*) ;;
2376       *) noconfigdirs="$noconfigdirs $dir" ;;
2377       esac
2378     done
2379   fi
2380
2381   AC_ARG_ENABLE(stage1-languages,
2382   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2383                   [choose additional languages to build during
2384                   stage1.  Mostly useful for compiler development])],
2385   [case ,${enable_stage1_languages}, in
2386     ,no,|,,)
2387       # Set it to something that will have no effect in the loop below
2388       enable_stage1_languages=c ;;
2389     ,yes,)
2390       enable_stage1_languages=`echo $new_enable_languages | \
2391         sed -e "s/^,//" -e "s/,$//" ` ;;
2392     *,all,*)
2393       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2394         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2395   esac
2396
2397   # Add "good" languages from enable_stage1_languages to stage1_languages,
2398   # while "bad" languages go in missing_languages.  Leave no duplicates.
2399   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2400     case $potential_languages in
2401       *,$i,*)
2402         case $stage1_languages in
2403           *,$i,*) ;;
2404           *) stage1_languages="$stage1_languages$i," ;;
2405         esac ;;
2406       *)
2407         case $missing_languages in
2408           *,$i,*) ;;
2409           *) missing_languages="$missing_languages$i," ;;
2410         esac ;;
2411      esac
2412   done])
2413
2414   # Remove leading/trailing commas that were added for simplicity
2415   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2416   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2417   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2418   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2419
2420   if test "x$missing_languages" != x; then
2421     AC_MSG_ERROR([
2422 The following requested languages could not be built: ${missing_languages}
2423 Supported languages are: ${potential_languages}])
2424   fi
2425   if test "x$new_enable_languages" != "x$enable_languages"; then
2426     echo The following languages will be built: ${new_enable_languages}
2427     enable_languages="$new_enable_languages"
2428   fi
2429
2430   AC_SUBST(stage1_languages)
2431   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2432 fi
2433
2434 # Handle --disable-<component> generically.
2435 for dir in $configdirs $build_configdirs $target_configdirs ; do
2436   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2437   varname=`echo $dirname | sed -e s/+/_/g`
2438   if eval test x\${enable_${varname}} "=" xno ; then
2439     noconfigdirs="$noconfigdirs $dir"
2440   fi
2441 done
2442
2443 # Check for Boehm's garbage collector
2444 AC_ARG_ENABLE(objc-gc,
2445 [AS_HELP_STRING([--enable-objc-gc],
2446                 [enable use of Boehm's garbage collector with the
2447                  GNU Objective-C runtime])])
2448 AC_ARG_WITH([target-bdw-gc],
2449 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2450                 [specify prefix directory for installed bdw-gc package.
2451                  Equivalent to --with-target-bdw-gc-include=PATH/include
2452                  plus --with-target-bdw-gc-lib=PATH/lib])])
2453 AC_ARG_WITH([target-bdw-gc-include],
2454 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2455                 [specify directories for installed bdw-gc include files])])
2456 AC_ARG_WITH([target-bdw-gc-lib],
2457 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2458                 [specify directories for installed bdw-gc library])])
2459
2460 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2461   AC_MSG_CHECKING([for bdw garbage collector])
2462   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2463     dnl no bdw-gw options, assume default locations
2464     AC_MSG_RESULT([using bdw-gc in default locations])
2465   else
2466     dnl bdw-gw options, first error checking, complete checking in libobjc
2467     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2468       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2469     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2470       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2471     else
2472       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2473     fi
2474   fi
2475 esac
2476
2477 # Disable libitm, libsanitizer, libvtv if we're not building C++
2478 case ,${enable_languages}, in
2479   *,c++,*)
2480     # Disable libitm, libsanitizer if we're not building libstdc++
2481     case "${noconfigdirs}" in
2482       *target-libstdc++-v3*)
2483         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2484         ;;
2485       *) ;;
2486     esac
2487     ;;
2488   *)
2489     noconfigdirs="$noconfigdirs target-libitm target-libsanitizer target-libvtv"
2490     ;;
2491 esac
2492
2493 case ,${enable_languages}, in
2494   *,rust,*)
2495     case " ${noconfigdirs} " in
2496       *\ target-libstdc++-v3\ *)
2497         # Disable target libgrust if we're not building target libstdc++.
2498         noconfigdirs="$noconfigdirs target-libgrust"
2499         ;;
2500     esac
2501     ;;
2502 esac
2503
2504 # If gcc/ is not in the source tree then we'll not be building a
2505 # target compiler, assume in that case we don't want to build any
2506 # target libraries or tools.
2507 #
2508 # This was added primarily for the benefit for binutils-gdb who reuse
2509 # this configure script, but don't always have target tools available.
2510 if test ! -d ${srcdir}/gcc; then
2511    skipdirs="${skipdirs} ${target_configdirs}"
2512 fi
2513
2514 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2515 # $build_configdirs and $target_configdirs.
2516 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2517
2518 notsupp=""
2519 for dir in . $skipdirs $noconfigdirs ; do
2520   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2521   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2522     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2523     if test -r $srcdir/$dirname/configure ; then
2524       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2525         true
2526       else
2527         notsupp="$notsupp $dir"
2528       fi
2529     fi
2530   fi
2531   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2532     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2533     if test -r $srcdir/$dirname/configure ; then
2534       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2535         true
2536       else
2537         notsupp="$notsupp $dir"
2538       fi
2539     fi
2540   fi
2541   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2542     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2543     if test -r $srcdir/$dirname/configure ; then
2544       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2545         true
2546       else
2547         notsupp="$notsupp $dir"
2548       fi
2549     fi
2550   fi
2551 done
2552
2553 # Quietly strip out all directories which aren't configurable in this tree.
2554 # This relies on all configurable subdirectories being autoconfiscated, which
2555 # is now the case.
2556 build_configdirs_all="$build_configdirs"
2557 build_configdirs=
2558 for i in ${build_configdirs_all} ; do
2559   j=`echo $i | sed -e s/build-//g`
2560   if test -f ${srcdir}/$j/configure ; then
2561     build_configdirs="${build_configdirs} $i"
2562   fi
2563 done
2564
2565 configdirs_all="$configdirs"
2566 configdirs=
2567 for i in ${configdirs_all} ; do
2568   if test -f ${srcdir}/$i/configure ; then
2569     configdirs="${configdirs} $i"
2570   fi
2571 done
2572
2573 target_configdirs_all="$target_configdirs"
2574 target_configdirs=
2575 for i in ${target_configdirs_all} ; do
2576   j=`echo $i | sed -e s/target-//g`
2577   if test -f ${srcdir}/$j/configure ; then
2578     target_configdirs="${target_configdirs} $i"
2579   fi
2580 done
2581
2582 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2583 # so we have to add it after the preceding checks.
2584 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2585 then
2586   case " $configdirs " in
2587     *" libiberty "*)
2588       # If we can build libiberty, we can also build libiberty-linker-plugin.
2589       configdirs="$configdirs libiberty-linker-plugin"
2590       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2591         --with-libiberty=../libiberty-linker-plugin";;
2592     *)
2593       AC_MSG_ERROR([libiberty missing]);;
2594   esac
2595 fi
2596
2597 # Sometimes we have special requirements for the host libiberty.
2598 extra_host_libiberty_configure_flags=
2599 case " $configdirs " in
2600   *" lto-plugin "* | *" libcc1 "* | *" gdbserver "*)
2601     # When these are to be built as shared libraries, the same applies to
2602     # libiberty.
2603     extra_host_libiberty_configure_flags=--enable-shared
2604     ;;
2605 esac
2606 AC_SUBST(extra_host_libiberty_configure_flags)
2607
2608 # Sometimes we have special requirements for the host zlib.
2609 extra_host_zlib_configure_flags=
2610 case " $configdirs " in
2611   *" bfd "*)
2612     # When bfd is to be built as a shared library, the same applies to
2613     # zlib.
2614     if test "$enable_shared" = "yes"; then
2615       extra_host_zlib_configure_flags=--enable-host-shared
2616     fi
2617     ;;
2618 esac
2619 AC_SUBST(extra_host_zlib_configure_flags)
2620
2621 # Produce a warning message for the subdirs we can't configure.
2622 # This isn't especially interesting in the Cygnus tree, but in the individual
2623 # FSF releases, it's important to let people know when their machine isn't
2624 # supported by the one or two programs in a package.
2625
2626 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2627   # If $appdirs is non-empty, at least one of those directories must still
2628   # be configured, or we error out.  (E.g., if the gas release supports a
2629   # specified target in some subdirs but not the gas subdir, we shouldn't
2630   # pretend that all is well.)
2631   if test -n "$appdirs" ; then
2632     for dir in $appdirs ; do
2633       if test -r $dir/Makefile.in ; then
2634         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2635           appdirs=""
2636           break
2637         fi
2638         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2639           appdirs=""
2640           break
2641         fi
2642       fi
2643     done
2644     if test -n "$appdirs" ; then
2645       echo "*** This configuration is not supported by this package." 1>&2
2646       exit 1
2647     fi
2648   fi
2649   # Okay, some application will build, or we don't care to check.  Still
2650   # notify of subdirs not getting built.
2651   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2652   echo "    ${notsupp}" 1>&2
2653   echo "    (Any other directories should still work fine.)" 1>&2
2654 fi
2655
2656 case "$host" in
2657   *msdosdjgpp*)
2658     enable_gdbtk=no ;;
2659 esac
2660
2661 # To find our prefix, in gcc_cv_tool_prefix.
2662 ACX_TOOL_DIRS
2663
2664 copy_dirs=
2665
2666 AC_ARG_WITH([build-sysroot],
2667   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2668                   [use sysroot as the system root during the build])],
2669   [if test x"$withval" != x ; then
2670      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2671    fi],
2672   [SYSROOT_CFLAGS_FOR_TARGET=])
2673 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2674
2675 AC_ARG_WITH([debug-prefix-map],
2676   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2677                   [map A to B, C to D ... in debug information])],
2678   [if test x"$withval" != x; then
2679      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2680      for debug_map in $withval; do
2681        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2682      done
2683    fi],
2684   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2685 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2686
2687 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2688 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2689 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2690 # We want to ensure that TARGET libraries (which we know are built with
2691 # gcc) are built with "-O2 -g", so include those options when setting
2692 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2693 if test "x$CFLAGS_FOR_TARGET" = x; then
2694   if test "x${is_cross_compiler}" = xyes; then
2695     CFLAGS_FOR_TARGET="-g -O2"
2696   else
2697     CFLAGS_FOR_TARGET=$CFLAGS
2698     case " $CFLAGS " in
2699       *" -O2 "*) ;;
2700       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2701     esac
2702     case " $CFLAGS " in
2703       *" -g "* | *" -g3 "*) ;;
2704       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2705     esac
2706   fi
2707 fi
2708 AC_SUBST(CFLAGS_FOR_TARGET)
2709
2710 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2711   if test "x${is_cross_compiler}" = xyes; then
2712     CXXFLAGS_FOR_TARGET="-g -O2"
2713   else
2714     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2715     case " $CXXFLAGS " in
2716       *" -O2 "*) ;;
2717       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2718     esac
2719     case " $CXXFLAGS " in
2720       *" -g "* | *" -g3 "*) ;;
2721       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2722     esac
2723   fi
2724 fi
2725 AC_SUBST(CXXFLAGS_FOR_TARGET)
2726
2727 AC_SUBST(LDFLAGS_FOR_TARGET)
2728
2729 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2730 # the named directory are copied to $(tooldir)/sys-include.
2731 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2732   if test x${is_cross_compiler} = xno ; then
2733     echo 1>&2 '***' --with-headers is only supported when cross compiling
2734     exit 1
2735   fi
2736   if test x"${with_headers}" != xyes ; then
2737     x=${gcc_cv_tool_prefix}
2738     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2739   fi
2740 fi
2741
2742 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2743 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2744 # are permitted.
2745 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2746   if test x${is_cross_compiler} = xno ; then
2747     echo 1>&2 '***' --with-libs is only supported when cross compiling
2748     exit 1
2749   fi
2750   if test x"${with_libs}" != xyes ; then
2751     # Copy the libraries in reverse order, so that files in the first named
2752     # library override files in subsequent libraries.
2753     x=${gcc_cv_tool_prefix}
2754     for l in ${with_libs}; do
2755       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2756     done
2757   fi
2758 fi
2759
2760 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2761 #
2762 # This is done by determining whether or not the appropriate directory
2763 # is available, and by checking whether or not specific configurations
2764 # have requested that this magic not happen.
2765 #
2766 # The command line options always override the explicit settings in
2767 # configure.ac, and the settings in configure.ac override this magic.
2768 #
2769 # If the default for a toolchain is to use GNU as and ld, and you don't
2770 # want to do that, then you should use the --without-gnu-as and
2771 # --without-gnu-ld options for the configure script.  Similarly, if
2772 # the default is to use the included zlib and you don't want to do that,
2773 # you should use the --with-system-zlib option for the configure script.
2774
2775 if test x${use_gnu_as} = x &&
2776    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2777   with_gnu_as=yes
2778   extra_host_args="$extra_host_args --with-gnu-as"
2779 fi
2780
2781 if test x${use_gnu_ld} = x &&
2782    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2783   with_gnu_ld=yes
2784   extra_host_args="$extra_host_args --with-gnu-ld"
2785 fi
2786
2787 if test x${use_included_zlib} = x &&
2788    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2789   :
2790 else
2791   with_system_zlib=yes
2792   extra_host_args="$extra_host_args --with-system-zlib"
2793 fi
2794
2795 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2796 # can detect this case.
2797
2798 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2799   with_newlib=yes
2800   extra_host_args="$extra_host_args --with-newlib"
2801 fi
2802
2803 # Handle ${copy_dirs}
2804 set fnord ${copy_dirs}
2805 shift
2806 while test $# != 0 ; do
2807   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2808     :
2809   else
2810     echo Copying $1 to $2
2811
2812     # Use the install script to create the directory and all required
2813     # parent directories.
2814     if test -d $2 ; then
2815       :
2816     else
2817       echo >config.temp
2818       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2819     fi
2820
2821     # Copy the directory, assuming we have tar.
2822     # FIXME: Should we use B in the second tar?  Not all systems support it.
2823     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2824
2825     # It is the responsibility of the user to correctly adjust all
2826     # symlinks.  If somebody can figure out how to handle them correctly
2827     # here, feel free to add the code.
2828
2829     echo $1 > $2/COPIED
2830   fi
2831   shift; shift
2832 done
2833
2834 # Determine a target-dependent exec_prefix that the installed
2835 # gcc will search in.  Keep this list sorted by triplet, with
2836 # the *-*-osname triplets last.
2837 md_exec_prefix=
2838 case "${target}" in
2839   i[[34567]]86-pc-msdosdjgpp*)
2840     md_exec_prefix=/dev/env/DJDIR/bin
2841     ;;
2842   *-*-hpux* | \
2843   *-*-nto-qnx* | \
2844   *-*-solaris2*)
2845     md_exec_prefix=/usr/ccs/bin
2846     ;;
2847 esac
2848
2849 extra_arflags_for_target=
2850 extra_nmflags_for_target=
2851 extra_ranlibflags_for_target=
2852 target_makefile_frag=/dev/null
2853 case "${target}" in
2854   spu-*-*)
2855     target_makefile_frag="config/mt-spu"
2856     ;;
2857   loongarch*-*linux* | loongarch*-*gnu*)
2858     target_makefile_frag="config/mt-loongarch-gnu"
2859     ;;
2860   loongarch*-*elf*)
2861     target_makefile_frag="config/mt-loongarch-elf"
2862     ;;
2863   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2864     target_makefile_frag="config/mt-sde"
2865     ;;
2866   mipsisa*-*-elfoabi*)
2867     target_makefile_frag="config/mt-mips-elfoabi"
2868     ;;
2869   mips*-*-*linux* | mips*-*-gnu*)
2870     target_makefile_frag="config/mt-mips-gnu"
2871     ;;
2872   nios2-*-elf*)
2873     target_makefile_frag="config/mt-nios2-elf"
2874     ;;
2875   *-*-linux-android*)
2876     target_makefile_frag="config/mt-android"
2877     ;;
2878   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2879     target_makefile_frag="config/mt-gnu"
2880     ;;
2881   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2882     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2883     # commands to handle both 32-bit and 64-bit objects.  These flags are
2884     # harmless if we're using GNU nm or ar.
2885     extra_arflags_for_target=" -X32_64"
2886     extra_nmflags_for_target=" -B -X32_64"
2887     ;;
2888 esac
2889
2890 alphaieee_frag=/dev/null
2891 case $target in
2892   alpha*-*-*)
2893     # This just makes sure to use the -mieee option to build target libs.
2894     # This should probably be set individually by each library.
2895     alphaieee_frag="config/mt-alphaieee"
2896     ;;
2897 esac
2898
2899 # If --enable-target-optspace always use -Os instead of -O2 to build
2900 # the target libraries, similarly if it is not specified, use -Os
2901 # on selected platforms.
2902 ospace_frag=/dev/null
2903 case "${enable_target_optspace}:${target}" in
2904   yes:*)
2905     ospace_frag="config/mt-ospace"
2906     ;;
2907   :d30v-*)
2908     ospace_frag="config/mt-d30v"
2909     ;;
2910   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2911     ospace_frag="config/mt-ospace"
2912     ;;
2913   no:* | :*)
2914     ;;
2915   *)
2916     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2917     ;;
2918 esac
2919
2920 # Some systems (e.g., one of the i386-aix systems the gas testers are
2921 # using) don't handle "\$" correctly, so don't use it here.
2922 tooldir='${exec_prefix}'/${target_noncanonical}
2923 build_tooldir=${tooldir}
2924
2925 # Create a .gdbinit file which runs the one in srcdir
2926 # and tells GDB to look there for source files.
2927
2928 if test -r ${srcdir}/.gdbinit ; then
2929   case ${srcdir} in
2930     .) ;;
2931     *) cat > ./.gdbinit <<EOF
2932 # ${NO_EDIT}
2933 dir ${srcdir}
2934 dir .
2935 source ${srcdir}/.gdbinit
2936 EOF
2937     ;;
2938   esac
2939 fi
2940
2941 # Make sure that the compiler is able to generate an executable.  If it
2942 # can't, we are probably in trouble.  We don't care whether we can run the
2943 # executable--we might be using a cross compiler--we only care whether it
2944 # can be created.  At this point the main configure script has set CC.
2945 we_are_ok=no
2946 echo "int main () { return 0; }" > conftest.c
2947 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2948 if test $? = 0 ; then
2949   if test -s conftest || test -s conftest.exe ; then
2950     we_are_ok=yes
2951   fi
2952 fi
2953 case $we_are_ok in
2954   no)
2955     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2956     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2957     rm -f conftest*
2958     exit 1
2959     ;;
2960 esac
2961 rm -f conftest*
2962
2963 # Decide which environment variable is used to find dynamic libraries.
2964 case "${host}" in
2965   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2966   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2967   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2968   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2969 esac
2970
2971 # On systems where the dynamic library environment variable is PATH,
2972 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2973 # built executables to PATH.
2974 if test "$RPATH_ENVVAR" = PATH; then
2975   GCC_SHLIB_SUBDIR=/shlib
2976 else
2977   GCC_SHLIB_SUBDIR=
2978 fi
2979
2980 # Adjust the toplevel makefile according to whether bootstrap was selected.
2981 case $enable_bootstrap in
2982   yes)
2983     bootstrap_suffix=bootstrap
2984     BUILD_CONFIG=bootstrap-debug
2985     ;;
2986   no)
2987     bootstrap_suffix=no-bootstrap
2988     BUILD_CONFIG=
2989     ;;
2990 esac
2991
2992 AC_MSG_CHECKING(for default BUILD_CONFIG)
2993
2994 AC_ARG_WITH([build-config],
2995   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2996                   [use config/NAME.mk build configuration])],
2997   [case $with_build_config in
2998    yes) with_build_config= ;;
2999    no) with_build_config= BUILD_CONFIG= ;;
3000    esac])
3001
3002 if test "x${with_build_config}" != x; then
3003   BUILD_CONFIG=$with_build_config
3004 else
3005   case $BUILD_CONFIG in
3006   bootstrap-debug)
3007     if echo "int f (void) { return 0; }" > conftest.c &&
3008        ${CC} -c conftest.c &&
3009        mv conftest.o conftest.o.g0 &&
3010        ${CC} -c -g conftest.c &&
3011        mv conftest.o conftest.o.g &&
3012        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
3013       :
3014     else
3015       BUILD_CONFIG=
3016     fi
3017     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
3018     ;;
3019   esac
3020 fi
3021 AC_MSG_RESULT($BUILD_CONFIG)
3022 AC_SUBST(BUILD_CONFIG)
3023
3024 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
3025 AC_MSG_CHECKING([for --enable-vtable-verify])
3026 AC_ARG_ENABLE(vtable-verify,
3027 [AS_HELP_STRING([--enable-vtable-verify],
3028                 [Enable vtable verification feature])],
3029 [case "$enableval" in
3030  yes) enable_vtable_verify=yes ;;
3031  no)  enable_vtable_verify=no ;;
3032  *)   enable_vtable_verify=no;;
3033  esac],
3034 [enable_vtable_verify=no])
3035 AC_MSG_RESULT($enable_vtable_verify)
3036
3037 # Record target_configdirs and the configure arguments for target and
3038 # build configuration in Makefile.
3039 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
3040 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
3041 bootstrap_fixincludes=no
3042
3043 # If we are building libgomp, bootstrap it.
3044 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
3045   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
3046 fi
3047
3048 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
3049 # or bootstrap-ubsan, bootstrap it.
3050 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
3051   case "$BUILD_CONFIG" in
3052     *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
3053       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
3054       bootstrap_fixincludes=yes
3055       ;;
3056   esac
3057 fi
3058
3059 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
3060 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
3061    test "$enable_vtable_verify" != no; then
3062   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
3063 fi
3064
3065 # If we are building libatomic and the list of enabled languages includes the
3066 # D frontend, bootstrap it.
3067 if echo " ${target_configdirs} " | grep " libatomic " > /dev/null 2>&1; then
3068   case ,${enable_languages}, in
3069     *,d,*)
3070       bootstrap_target_libs=${bootstrap_target_libs}target-libatomic,
3071       ;;
3072   esac
3073 fi
3074
3075 # Determine whether gdb needs tk/tcl or not.
3076 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
3077 # and in that case we want gdb to be built without tk.  Ugh!
3078 # In fact I believe gdb is the *only* package directly dependent on tk,
3079 # so we should be able to put the 'maybe's in unconditionally and
3080 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
3081 # 100% sure that that's safe though.
3082
3083 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
3084 case "$enable_gdbtk" in
3085   no)
3086     GDB_TK="" ;;
3087   yes)
3088     GDB_TK="${gdb_tk}" ;;
3089   *)
3090     # Only add the dependency on gdbtk when GDBtk is part of the gdb
3091     # distro.  Eventually someone will fix this and move Insight, nee
3092     # gdbtk to a separate directory.
3093     if test -d ${srcdir}/gdb/gdbtk ; then
3094       GDB_TK="${gdb_tk}"
3095     else
3096       GDB_TK=""
3097     fi
3098     ;;
3099 esac
3100 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
3101 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
3102
3103 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
3104 # else does, only include them if one of these is built.  The Makefile
3105 # provides the ordering, so it's enough here to add to the list.
3106 case " ${configdirs} " in
3107   *\ gdb\ *)
3108     configdirs="${configdirs} gnulib gdbsupport"
3109     ;;
3110   *\ gdbserver\ *)
3111     configdirs="${configdirs} gnulib gdbsupport"
3112     ;;
3113   *\ sim\ *)
3114     configdirs="${configdirs} gnulib"
3115     ;;
3116 esac
3117
3118 # Strip out unwanted targets.
3119
3120 # While at that, we remove Makefiles if we were started for recursive
3121 # configuration, so that the top-level Makefile reconfigures them,
3122 # like we used to do when configure itself was recursive.
3123
3124 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
3125 # but now we're fixing up the Makefile ourselves with the additional
3126 # commands passed to AC_CONFIG_FILES.  Use separate variables
3127 # extrasub-{build,host,target} not because there is any reason to split
3128 # the substitutions up that way, but only to remain below the limit of
3129 # 99 commands in a script, for HP-UX sed.
3130
3131 # Do not nest @if/@endif or @unless/@endunless pairs, because
3132 # configure will not warn you at all.
3133
3134 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
3135   yes:yes:*\ gold\ *:*,c++,*) ;;
3136   yes:yes:*\ gold\ *:*)
3137     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
3138     ;;
3139 esac
3140
3141 extrasub_build=
3142 for module in ${build_configdirs} ; do
3143   if test -z "${no_recursion}" \
3144      && test -f ${build_subdir}/${module}/Makefile; then
3145     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
3146     rm -f ${build_subdir}/${module}/Makefile
3147   fi
3148   extrasub_build="$extrasub_build
3149 /^@if build-$module\$/d
3150 /^@endif build-$module\$/d
3151 /^@unless build-$module\$/,/^@endunless build-$module\$/d
3152 /^@if build-$module-$bootstrap_suffix\$/d
3153 /^@endif build-$module-$bootstrap_suffix\$/d
3154 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
3155 done
3156 extrasub_host=
3157 for module in ${configdirs} ; do
3158   if test -z "${no_recursion}"; then
3159     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
3160       if test -f ${file}; then
3161         echo 1>&2 "*** removing ${file} to force reconfigure"
3162         rm -f ${file}
3163       fi
3164     done
3165   fi
3166   case ${module},${bootstrap_fixincludes} in
3167     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
3168     *) host_bootstrap_suffix=$bootstrap_suffix ;;
3169   esac
3170   extrasub_host="$extrasub_host
3171 /^@if $module\$/d
3172 /^@endif $module\$/d
3173 /^@unless $module\$/,/^@endunless $module\$/d
3174 /^@if $module-$host_bootstrap_suffix\$/d
3175 /^@endif $module-$host_bootstrap_suffix\$/d
3176 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
3177 done
3178 extrasub_target=
3179 for module in ${target_configdirs} ; do
3180   if test -z "${no_recursion}" \
3181      && test -f ${target_subdir}/${module}/Makefile; then
3182     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
3183     rm -f ${target_subdir}/${module}/Makefile
3184   fi
3185
3186   # We only bootstrap target libraries listed in bootstrap_target_libs.
3187   case $bootstrap_target_libs in
3188     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
3189     *) target_bootstrap_suffix=no-bootstrap ;;
3190   esac
3191
3192   extrasub_target="$extrasub_target
3193 /^@if target-$module\$/d
3194 /^@endif target-$module\$/d
3195 /^@unless target-$module\$/,/^@endunless target-$module\$/d
3196 /^@if target-$module-$target_bootstrap_suffix\$/d
3197 /^@endif target-$module-$target_bootstrap_suffix\$/d
3198 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
3199 done
3200
3201 # Do the final fixup along with target modules.
3202 extrasub_target="$extrasub_target
3203 /^@if /,/^@endif /d
3204 /^@unless /d
3205 /^@endunless /d"
3206
3207 if test "$enable_pgo_build" != "no"; then
3208   extrasub_build="$extrasub_build
3209 /^@if pgo-build\$/d
3210 /^@endif pgo-build\$/d"
3211 fi
3212
3213 # Create the serialization dependencies.  This uses a temporary file.
3214
3215 AC_ARG_ENABLE([serial-configure],
3216 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
3217                 [force sequential configuration of
3218                  sub-packages for the host, target or build
3219                  machine, or all sub-packages])])
3220
3221 case ${enable_serial_configure} in
3222   yes)
3223     enable_serial_build_configure=yes
3224     enable_serial_host_configure=yes
3225     enable_serial_target_configure=yes
3226     ;;
3227 esac
3228
3229 # These force 'configure's to be done one at a time, to avoid problems
3230 # with contention over a shared config.cache.
3231 rm -f serdep.tmp
3232 if test "x${enable_serial_build_configure}" = xyes || test "x${enable_serial_host_configure}" = xyes || test "x${enable_serial_target_configure}" = xyes; then
3233 echo '# serdep.tmp' > serdep.tmp
3234 fi
3235 olditem=
3236 test "x${enable_serial_build_configure}" = xyes &&
3237 for item in ${build_configdirs} ; do
3238   case ${olditem} in
3239     "") ;;
3240     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
3241   esac
3242   olditem=${item}
3243 done
3244 olditem=
3245 test "x${enable_serial_host_configure}" = xyes &&
3246 for item in ${configdirs} ; do
3247   case ${olditem} in
3248     "") ;;
3249     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
3250   esac
3251   olditem=${item}
3252 done
3253 olditem=
3254 test "x${enable_serial_target_configure}" = xyes &&
3255 for item in ${target_configdirs} ; do
3256   case ${olditem} in
3257     "") ;;
3258     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
3259   esac
3260   olditem=${item}
3261 done
3262 serialization_dependencies=serdep.tmp
3263 AC_SUBST_FILE(serialization_dependencies)
3264
3265 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
3266 # target, nonopt, and variable assignments.  These are the ones we
3267 # might not want to pass down to subconfigures.  The exception being
3268 # --cache-file=/dev/null, which is used to turn off the use of cache
3269 # files altogether, and which should be passed on to subconfigures.
3270 # Also strip program-prefix, program-suffix, and program-transform-name,
3271 # so that we can pass down a consistent program-transform-name.
3272 hbaseargs=
3273 bbaseargs=
3274 tbaseargs=
3275 keep_next=no
3276 skip_next=no
3277 eval "set -- $ac_configure_args"
3278 for ac_arg
3279 do
3280   if test X"$skip_next" = X"yes"; then
3281     skip_next=no
3282     continue
3283   fi
3284   if test X"$keep_next" = X"yes"; then
3285     case $ac_arg in
3286       *\'*)
3287         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3288     esac
3289     hbaseargs="$hbaseargs '$ac_arg'"
3290     bbaseargs="$bbaseargs '$ac_arg'"
3291     tbaseargs="$tbaseargs '$ac_arg'"
3292     keep_next=no
3293     continue
3294   fi
3295
3296   # Handle separated arguments.  Based on the logic generated by
3297   # autoconf 2.59.
3298   case $ac_arg in
3299     *=* | --config-cache | -C | -disable-* | --disable-* \
3300       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3301       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3302       | -with-* | --with-* | -without-* | --without-* | --x)
3303       separate_arg=no
3304       ;;
3305     -*)
3306       separate_arg=yes
3307       ;;
3308     *)
3309       separate_arg=no
3310       ;;
3311   esac
3312
3313   skip_targ=no
3314   skip_barg=no
3315   case $ac_arg in
3316 changequote(,)
3317   --with-* | --without-*)
3318     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3319
3320     case $libopt in
3321     *[-_]include)
3322       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3323       ;;
3324     *[-_]lib)
3325       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3326       ;;
3327     *[-_]prefix)
3328       lib=`echo "$libopt" | sed 's,[-_]prefix$,,'`
3329       ;;
3330     *[-_]type)
3331       lib=`echo "$libopt" | sed 's,[-_]type$,,'`
3332       ;;
3333     *)
3334       lib=$libopt
3335       ;;
3336     esac
3337 changequote([,])
3338
3339     case $lib in
3340     mpc | mpfr | gmp | isl)
3341       # If we're processing --with-$lib, --with-$lib-include or
3342       # --with-$lib-lib, for one of the libs above, and target is
3343       # different from host, don't pass the current argument to any
3344       # target library's configure.
3345       if test x$is_cross_compiler = xyes; then
3346         skip_targ=yes
3347       fi
3348       ;;
3349     libintl | libiconv)
3350       # We don't want libintl (and co.) in anything but the host arguments.
3351       skip_targ=yes
3352       skip_barg=yes
3353       ;;
3354     esac
3355     ;;
3356   esac
3357
3358   case "$ac_arg" in
3359     --cache-file=/dev/null | \
3360     -cache-file=/dev/null )
3361       # Handled here to avoid the test to skip args below.
3362       hbaseargs="$hbaseargs '$ac_arg'"
3363       bbaseargs="$bbaseargs '$ac_arg'"
3364       tbaseargs="$tbaseargs '$ac_arg'"
3365       # Assert: $separate_arg should always be no.
3366       keep_next=$separate_arg
3367       ;;
3368     --no*)
3369       continue
3370       ;;
3371     --c* | \
3372     --sr* | \
3373     --ho* | \
3374     --bu* | \
3375     --t* | \
3376     --program-* | \
3377     -cache_file* | \
3378     -srcdir* | \
3379     -host* | \
3380     -build* | \
3381     -target* | \
3382     -program-prefix* | \
3383     -program-suffix* | \
3384     -program-transform-name* )
3385       skip_next=$separate_arg
3386       continue
3387       ;;
3388     -*)
3389       # An option.  Add it.
3390       case $ac_arg in
3391         *\'*)
3392           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3393       esac
3394       hbaseargs="$hbaseargs '$ac_arg'"
3395       if test X"$skip_barg" = Xno; then
3396         bbaseargs="$bbaseargs '$ac_arg'"
3397       fi
3398       if test X"$skip_targ" = Xno; then
3399         tbaseargs="$tbaseargs '$ac_arg'"
3400       fi
3401       keep_next=$separate_arg
3402       ;;
3403     *)
3404       # Either a variable assignment, or a nonopt (triplet).  Don't
3405       # pass it down; let the Makefile handle this.
3406       continue
3407       ;;
3408   esac
3409 done
3410 # Remove the initial space we just introduced and, as these will be
3411 # expanded by make, quote '$'.
3412 hbaseargs=`echo "x$hbaseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3413 bbaseargs=`echo "x$bbaseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3414
3415 # Add in --program-transform-name, after --program-prefix and
3416 # --program-suffix have been applied to it.  Autoconf has already
3417 # doubled dollar signs and backslashes in program_transform_name; we want
3418 # the backslashes un-doubled, and then the entire thing wrapped in single
3419 # quotes, because this will be expanded first by make and then by the shell.
3420 # Also, because we want to override the logic in subdir configure scripts to
3421 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3422 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3423 ${program_transform_name}
3424 EOF_SED
3425 gcc_transform_name=`cat conftestsed.out`
3426 rm -f conftestsed.out
3427 hbaseargs="$hbaseargs --program-transform-name='${gcc_transform_name}'"
3428 bbaseargs="$bbaseargs --program-transform-name='${gcc_transform_name}'"
3429 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3430 if test "$silent" = yes; then
3431   bbaseargs="$bbaseargs --silent"
3432   hbaseargs="$hbaseargs --silent"
3433   tbaseargs="$tbaseargs --silent"
3434 fi
3435
3436 bbaseargs="$bbaseargs --disable-option-checking"
3437 hbaseargs="$hbaseargs --disable-option-checking"
3438 tbaseargs="$tbaseargs --disable-option-checking"
3439
3440 if test "$enable_year2038" = no; then
3441   baseargs="$baseargs --disable-year2038"
3442   tbaseargs="$tbaseargs --disable-year2038"
3443 fi
3444
3445 # Record and document user additions to sub configure arguments.
3446 AC_ARG_VAR([build_configargs],
3447            [additional configure arguments for build directories])
3448 AC_ARG_VAR([host_configargs],
3449            [additional configure arguments for host directories])
3450 AC_ARG_VAR([target_configargs],
3451            [additional configure arguments for target directories])
3452
3453 # For the build-side libraries, we just need to pretend we're native,
3454 # and not use the same cache file.  Multilibs are neither needed nor
3455 # desired.  We can't even use the same cache file for all build-side
3456 # libraries, as they're compiled differently; some with C, some with
3457 # C++ or with different feature-enabling options.
3458 build_configargs="$build_configargs --cache-file=./config.cache ${bbaseargs}"
3459
3460 # For host modules, accept cache file option, or specification as blank.
3461 case "${cache_file}" in
3462 "") # empty
3463   cache_file_option="" ;;
3464 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3465   cache_file_option="--cache-file=${cache_file}" ;;
3466 *) # relative path
3467   cache_file_option="--cache-file=../${cache_file}" ;;
3468 esac
3469
3470 # Host dirs don't like to share a cache file either, horribly enough.
3471 # This seems to be due to autoconf 2.5x stupidity.
3472 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${hbaseargs}"
3473
3474 target_configargs="$target_configargs ${tbaseargs}"
3475
3476 # Passing a --with-cross-host argument lets the target libraries know
3477 # whether they are being built with a cross-compiler or being built
3478 # native.  However, it would be better to use other mechanisms to make the
3479 # sorts of decisions they want to make on this basis.  Please consider
3480 # this option to be deprecated.  FIXME.
3481 if test x${is_cross_compiler} = xyes ; then
3482   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3483 fi
3484
3485 # Special user-friendly check for native x86_64-linux build, if
3486 # multilib is not explicitly enabled.
3487 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3488   x86_64-*linux*:yes:$build:$build:)
3489     # Make sure we have a development environment that handles 32-bit
3490     dev64=no
3491     echo "int main () { return 0; }" > conftest.c
3492     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3493     if test $? = 0 ; then
3494       if test -s conftest || test -s conftest.exe ; then
3495         dev64=yes
3496       fi
3497     fi
3498     rm -f conftest*
3499     if test x${dev64} != xyes ; then
3500       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.])
3501     fi
3502     ;;
3503 esac
3504
3505 # Default to --enable-multilib.
3506 if test x${enable_multilib} = x ; then
3507   target_configargs="--enable-multilib ${target_configargs}"
3508 fi
3509
3510 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3511 # changed from the earlier setting of with_newlib.
3512 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3513   target_configargs="--with-newlib ${target_configargs}"
3514 fi
3515
3516 # Different target subdirs use different values of certain variables
3517 # (notably CXX).  Worse, multilibs use *lots* of different values.
3518 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3519 # it doesn't automatically accept command-line overrides of them.
3520 # This means it's not safe for target subdirs to share a cache file,
3521 # which is disgusting, but there you have it.  Hopefully this can be
3522 # fixed in future.  It's still worthwhile to use a cache file for each
3523 # directory.  I think.
3524
3525 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3526 # We need to pass --target, as newer autoconf's requires consistency
3527 # for target_alias and gcc doesn't manage it consistently.
3528 target_configargs="--cache-file=./config.cache ${target_configargs}"
3529
3530 FLAGS_FOR_TARGET=
3531 case " $target_configdirs " in
3532  *" newlib "*)
3533   case " $target_configargs " in
3534   *" --with-newlib "*)
3535    case "$target" in
3536     *-cygwin*)
3537       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3538       ;;
3539    esac
3540
3541    # If we're not building GCC, don't discard standard headers.
3542    if test -d ${srcdir}/gcc; then
3543      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3544
3545      if test "${build}" != "${host}"; then
3546        # On Canadian crosses, CC_FOR_TARGET will have already been set
3547        # by `configure', so we won't have an opportunity to add -Bgcc/
3548        # to it.  This is right: we don't want to search that directory
3549        # for binaries, but we want the header files in there, so add
3550        # them explicitly.
3551        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3552
3553        # Someone might think of using the pre-installed headers on
3554        # Canadian crosses, in case the installed compiler is not fully
3555        # compatible with the compiler being built.  In this case, it
3556        # would be better to flag an error than risking having
3557        # incompatible object files being constructed.  We can't
3558        # guarantee that an error will be flagged, but let's hope the
3559        # compiler will do it, when presented with incompatible header
3560        # files.
3561      fi
3562    fi
3563
3564    case "${target}-${is_cross_compiler}" in
3565    i[[3456789]]86-*-linux*-no)
3566       # Here host == target, so we don't need to build gcc,
3567       # so we don't want to discard standard headers.
3568       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3569       ;;
3570    *)
3571       # If we're building newlib, use its generic headers last, but search
3572       # for any libc-related directories first (so make it the last -B
3573       # switch).
3574       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3575
3576       # If we're building libgloss, find the startup file, simulator library
3577       # and linker script.
3578       case " $target_configdirs " in
3579         *" libgloss "*)
3580         # Look for startup file, simulator library and maybe linker script.
3581         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3582         # Look for libnosys.a in case the target needs it.
3583         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3584         # Most targets have the linker script in the source directory.
3585         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3586         ;;
3587       esac
3588       ;;
3589    esac
3590    ;;
3591   esac
3592   ;;
3593 esac
3594
3595 case "$target" in
3596   x86_64-*mingw* | *-w64-mingw*)
3597   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3598   # however, use a symlink named 'mingw' in ${prefix} .
3599     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3600     ;;
3601   *-mingw*)
3602   # MinGW can't be handled as Cygwin above since it does not use newlib.
3603     FLAGS_FOR_TARGET=$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'
3604     ;;
3605 esac
3606
3607 # Allow the user to override the flags for
3608 # our build compiler if desired.
3609 if test x"${build}" = x"${host}" ; then
3610   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3611   CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
3612   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3613   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3614 fi
3615
3616 # On Canadian crosses, we'll be searching the right directories for
3617 # the previously-installed cross compiler, so don't bother to add
3618 # flags for directories within the install tree of the compiler
3619 # being built; programs in there won't even run.
3620 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3621   # Search for pre-installed headers if nothing else fits.
3622   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3623 fi
3624
3625 if test "x${use_gnu_ld}" = x &&
3626    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3627   # Arrange for us to find uninstalled linker scripts.
3628   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3629 fi
3630
3631 # Search for other target-specific linker scripts and such.
3632 case "${target}" in
3633   mep*)
3634     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3635     ;;
3636   # The VxWorks support for shared libraries is getting in
3637   # incrementally.  Make sure it doesn't get activated implicitly:
3638   *vxworks*)
3639     if test "${enable_shared-unset}" = unset ; then
3640       enable_shared=no
3641       # So the build of libraries knows ...
3642       target_configargs="${target_configargs} --disable-shared"
3643       # So gcc knows ...
3644       host_configargs="${host_configargs} --disable-shared"
3645     fi
3646     ;;
3647 esac
3648
3649 # Makefile fragments.
3650 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3651 do
3652   eval fragval=\$$frag
3653   if test $fragval != /dev/null; then
3654     eval $frag=${srcdir}/$fragval
3655   fi
3656 done
3657 AC_SUBST_FILE(host_makefile_frag)
3658 AC_SUBST_FILE(target_makefile_frag)
3659 AC_SUBST_FILE(alphaieee_frag)
3660 AC_SUBST_FILE(ospace_frag)
3661
3662 # Miscellanea: directories, flags, etc.
3663 AC_SUBST(RPATH_ENVVAR)
3664 AC_SUBST(GCC_SHLIB_SUBDIR)
3665 AC_SUBST(tooldir)
3666 AC_SUBST(build_tooldir)
3667 AC_SUBST(CONFIGURE_GDB_TK)
3668 AC_SUBST(GDB_TK)
3669 AC_SUBST(INSTALL_GDB_TK)
3670
3671 # Build module lists & subconfigure args.
3672 AC_SUBST(build_configargs)
3673 AC_SUBST(build_configdirs)
3674
3675 # Host module lists & subconfigure args.
3676 AC_SUBST(host_configargs)
3677 AC_SUBST(configdirs)
3678 AC_SUBST(target_configdirs)
3679
3680 # Target module lists & subconfigure args.
3681 AC_SUBST(target_configargs)
3682
3683
3684 # Build tools.
3685 AC_SUBST(AR_FOR_BUILD)
3686 AC_SUBST(AS_FOR_BUILD)
3687 AC_SUBST(CC_FOR_BUILD)
3688 AC_SUBST(CFLAGS_FOR_BUILD)
3689 AC_SUBST(CPP_FOR_BUILD)
3690 AC_SUBST(CPPFLAGS_FOR_BUILD)
3691 AC_SUBST(CXXFLAGS_FOR_BUILD)
3692 AC_SUBST(CXX_FOR_BUILD)
3693 AC_SUBST(DLLTOOL_FOR_BUILD)
3694 AC_SUBST(DSYMUTIL_FOR_BUILD)
3695 AC_SUBST(GFORTRAN_FOR_BUILD)
3696 AC_SUBST(GOC_FOR_BUILD)
3697 AC_SUBST(GDC_FOR_BUILD)
3698 AC_SUBST(LDFLAGS_FOR_BUILD)
3699 AC_SUBST(LD_FOR_BUILD)
3700 AC_SUBST(NM_FOR_BUILD)
3701 AC_SUBST(RANLIB_FOR_BUILD)
3702 AC_SUBST(WINDMC_FOR_BUILD)
3703 AC_SUBST(WINDRES_FOR_BUILD)
3704
3705 # Generate default definitions for YACC, M4, LEX and other programs that run
3706 # on the build machine.  These are used if the Makefile can't locate these
3707 # programs in objdir.
3708 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3709
3710 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3711 case " $build_configdirs " in
3712   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3713 esac
3714
3715 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3716 case " $build_configdirs " in
3717   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3718 esac
3719
3720 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3721 case " $build_configdirs " in
3722   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3723 esac
3724
3725 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3726 case " $build_configdirs " in
3727   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3728   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3729 esac
3730
3731 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3732 case " $build_configdirs " in
3733   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3734 esac
3735
3736 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3737 case " $build_configdirs " in
3738   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3739   *)
3740 changequote(,)
3741     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3742     # higher, else we use the "missing" dummy.
3743     if ${MAKEINFO} --version \
3744        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3745       :
3746     else
3747       MAKEINFO="$MISSING makeinfo"
3748     fi
3749     ;;
3750 changequote([,])
3751 esac
3752
3753 # FIXME: expect and dejagnu may become build tools?
3754
3755 AC_CHECK_PROGS(EXPECT, expect, expect)
3756 case " $configdirs " in
3757   *" expect "*)
3758     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3759     ;;
3760 esac
3761
3762 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3763 case " $configdirs " in
3764   *" dejagnu "*)
3765     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3766     ;;
3767 esac
3768
3769
3770 # Host tools.
3771 NCN_STRICT_CHECK_TOOLS(AR, ar)
3772 NCN_STRICT_CHECK_TOOLS(AS, as)
3773 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3774 NCN_STRICT_CHECK_TOOLS(DSYMUTIL, dsymutil)
3775 NCN_STRICT_CHECK_TOOLS(LD, ld)
3776 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3777 NCN_STRICT_CHECK_TOOLS(NM, nm)
3778 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3779 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3780 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3781 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3782 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3783 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3784 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3785 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3786 AC_SUBST(CC)
3787 AC_SUBST(CXX)
3788 AC_SUBST(CFLAGS)
3789 AC_SUBST(CXXFLAGS)
3790 AC_SUBST(GDC)
3791 AC_SUBST(GDCFLAGS)
3792 GDCFLAGS=${GDCFLAGS-${CFLAGS}}
3793 AC_SUBST(PKG_CONFIG_PATH)
3794
3795 GCC_PLUGIN_OPTION(PLUGIN_OPTION)
3796 AR_PLUGIN_OPTION=
3797 RANLIB_PLUGIN_OPTION=
3798 if test -n "$PLUGIN_OPTION"; then
3799   if $AR --help 2>&1 | grep -q "\--plugin"; then
3800     AR_PLUGIN_OPTION="$PLUGIN_OPTION"
3801   fi
3802   if $RANLIB --help 2>&1 | grep -q "\--plugin"; then
3803     RANLIB_PLUGIN_OPTION="$PLUGIN_OPTION"
3804   fi
3805 fi
3806 AC_SUBST(AR_PLUGIN_OPTION)
3807 AC_SUBST(RANLIB_PLUGIN_OPTION)
3808
3809 # Target tools.
3810 AC_ARG_WITH([build-time-tools],
3811   [AS_HELP_STRING([--with-build-time-tools=PATH],
3812                   [use given path to find target tools during the build])],
3813   [case x"$withval" in
3814      x/*) ;;
3815      *)
3816        with_build_time_tools=
3817        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3818        ;;
3819    esac],
3820   [with_build_time_tools=])
3821
3822 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3823 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3824 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3825 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3826 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3827 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3828 NCN_STRICT_CHECK_TARGET_TOOLS(GM2_FOR_TARGET, gm2)
3829
3830 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3831 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3832 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3833 ACX_CHECK_INSTALLED_TARGET_TOOL(DSYMUTIL_FOR_TARGET, dsymutil)
3834 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3835 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3836 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3837 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3838 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3839 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3840 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3841 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3842 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3843 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3844 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3845
3846 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3847
3848 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3849 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3850 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3851 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3852 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3853                 [gcc/xg++ -B$$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$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3854                 c++)
3855 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3856                 [gcc/xgcc -shared-libgcc -B$$r/$(HOST_SUBDIR)/gcc -nostdinc++ -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3857                 c++)
3858 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3859 GCC_TARGET_TOOL(dsymutil, DSYMUTIL_FOR_TARGET, DSYMUTIL)
3860 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3861 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3862                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3863 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3864                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3865 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3866                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3867 GCC_TARGET_TOOL(gm2, GM2_FOR_TARGET, GM2,
3868                 [gcc/gm2 -B$$r/$(HOST_SUBDIR)/gcc/], m2)
3869 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3870 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3871 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3872 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3873 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3874 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3875 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3876 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3877 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3878 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3879 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3880
3881 AC_SUBST(FLAGS_FOR_TARGET)
3882 AC_SUBST(RAW_CXX_FOR_TARGET)
3883
3884 # Certain tools may need extra flags.
3885 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3886 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3887 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3888
3889 # When building target libraries, except in a Canadian cross, we use
3890 # the same toolchain as the compiler we just built.
3891 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3892 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3893 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3894 if test $host = $build; then
3895   case " $configdirs " in
3896     *" gcc "*)
3897       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3898       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3899       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3900       ;;
3901   esac
3902 fi
3903
3904 AC_SUBST(COMPILER_AS_FOR_TARGET)
3905 AC_SUBST(COMPILER_LD_FOR_TARGET)
3906 AC_SUBST(COMPILER_NM_FOR_TARGET)
3907
3908 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3909 AC_ARG_ENABLE(maintainer-mode,
3910 [AS_HELP_STRING([--enable-maintainer-mode],
3911                 [enable make rules and dependencies not useful
3912                  (and sometimes confusing) to the casual installer])],
3913       USE_MAINTAINER_MODE=$enableval,
3914       USE_MAINTAINER_MODE=no)
3915 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3916 AC_SUBST(MAINTAINER_MODE_TRUE)
3917 AC_SUBST(MAINTAINER_MODE_FALSE)
3918 if test "$USE_MAINTAINER_MODE" = yes; then
3919   MAINTAINER_MODE_TRUE=
3920   MAINTAINER_MODE_FALSE='#'
3921 else
3922   MAINTAINER_MODE_TRUE='#'
3923   MAINTAINER_MODE_FALSE=
3924 fi
3925 MAINT=$MAINTAINER_MODE_TRUE
3926 AC_SUBST(MAINT)dnl
3927
3928 # ---------------------
3929 # GCC bootstrap support
3930 # ---------------------
3931
3932 # Stage specific cflags for build.
3933 stage1_cflags="-g"
3934 case $build in
3935   vax-*-*)
3936     case ${GCC} in
3937       yes) stage1_cflags="-g -Wa,-J" ;;
3938       *) stage1_cflags="-g -J" ;;
3939     esac ;;
3940 esac
3941
3942 AC_SUBST(stage1_cflags)
3943
3944 # Enable --enable-checking in stage1 of the compiler.
3945 AC_ARG_ENABLE(stage1-checking,
3946 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3947                 [choose additional checking for stage1 of the compiler])],
3948 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3949 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3950   # For --disable-checking or implicit --enable-checking=release, avoid
3951   # setting --enable-checking=gc in the default stage1 checking for LTO
3952   # bootstraps.  See PR62077.
3953   case $BUILD_CONFIG in
3954     *lto*)
3955       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3956     *)
3957       stage1_checking=--enable-checking=yes,types;;
3958   esac
3959   if test "x$enable_checking" = x && \
3960      test -d ${srcdir}/gcc && \
3961      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3962     stage1_checking=--enable-checking=yes,types,extra
3963   fi
3964 else
3965   stage1_checking=--enable-checking=$enable_checking,types
3966 fi])
3967 AC_SUBST(stage1_checking)
3968
3969 # Enable -Werror in bootstrap stage2 and later.
3970 AC_ARG_ENABLE(werror,
3971 [AS_HELP_STRING([--enable-werror],
3972                 [enable -Werror in bootstrap stage2 and later])],
3973 [
3974 case ${enable_werror} in
3975   yes) stage2_werror_flag="--enable-werror-always" ;;
3976   *) stage2_werror_flag="" ;;
3977 esac
3978 ],
3979 [
3980 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3981   case $BUILD_CONFIG in
3982   bootstrap-debug)
3983       stage2_werror_flag="--enable-werror-always" ;;
3984   "")
3985       stage2_werror_flag="--enable-werror-always" ;;
3986   esac
3987 fi
3988 ])
3989
3990 AC_SUBST(stage2_werror_flag)
3991
3992 # Specify what files to not compare during bootstrap.
3993
3994 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3995 compare_exclusions="$compare_exclusions | gcc/m2/gm2-compiler-boot/M2Version*"
3996 compare_exclusions="$compare_exclusions | gcc/m2/gm2-compiler-boot/SYSTEM*"
3997 compare_exclusions="$compare_exclusions | gcc/m2/gm2version*"
3998 case "$target" in
3999   hppa*64*-*-hpux*) ;;
4000   powerpc*-ibm-aix*) compare_exclusions="$compare_exclusions | *libgomp*\$(objext)" ;;
4001 esac
4002 AC_SUBST(compare_exclusions)
4003
4004 AC_CONFIG_FILES([Makefile],
4005   [sed "$extrasub_build" Makefile |
4006    sed "$extrasub_host" |
4007    sed "$extrasub_target" > mf$$
4008    mv -f mf$$ Makefile],
4009   [extrasub_build="$extrasub_build"
4010    extrasub_host="$extrasub_host"
4011    extrasub_target="$extrasub_target"])
4012 AC_OUTPUT