configure.ac

   1 #   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2 #   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012,
   3 #   2014, 2015, 2016, 2019, 2022 Free Software Foundation, Inc.
   4 #
   5 # This file is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  18
  19 ##############################################################################
  20 ### WARNING: this file contains embedded tabs.  Do not run untabify on this file.
  21
  22 m4_include(config/acx.m4)
  23 m4_include(config/override.m4)
  24 m4_include(config/proginstall.m4)
  25 m4_include(config/elf.m4)
  26 m4_include(config/ax_cxx_compile_stdcxx.m4)
  27 m4_include([libtool.m4])
  28 m4_include([ltoptions.m4])
  29 m4_include([ltsugar.m4])
  30 m4_include([ltversion.m4])
  31 m4_include([lt~obsolete.m4])
  32 m4_include([config/isl.m4])
  33
  34 AC_INIT(move-if-change)
  35 AC_DISABLE_OPTION_CHECKING
  36
  37 progname=$0
  38 # if PWD already has a value, it is probably wrong.
  39 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  40
  41 # Export original configure arguments for use by sub-configures.
  42 # Quote arguments with shell meta charatcers.
  43 TOPLEVEL_CONFIGURE_ARGUMENTS=
  44 set -- "$progname" "$@"
  45 for ac_arg
  46 do
  47   case "$ac_arg" in
  48   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  49     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  50     # if the argument is of the form -foo=baz, quote the baz part only
  51     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  52   *) ;;
  53   esac
  54   # Add the quoted argument to the list.
  55   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  56 done
  57 if test "$silent" = yes; then
  58   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  59 fi
  60 # Remove the initial space we just introduced and, as these will be
  61 # expanded by make, quote '$'.
  62 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  63 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  64
  65 # Find the build, host, and target systems.
  66 ACX_NONCANONICAL_BUILD
  67 ACX_NONCANONICAL_HOST
  68 ACX_NONCANONICAL_TARGET
  69
  70 dnl Autoconf 2.5x and later will set a default program prefix if
  71 dnl --target was used, even if it was the same as --host.  Disable
  72 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  73 dnl to take effect.
  74 test "$host_noncanonical" = "$target_noncanonical" &&
  75   test "$program_prefix$program_suffix$program_transform_name" = \
  76     NONENONEs,x,x, &&
  77   program_transform_name=s,y,y,
  78
  79 AC_CANONICAL_SYSTEM
  80 AC_ARG_PROGRAM
  81
  82 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  83 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  84
  85 # Get 'install' or 'install-sh' and its variants.
  86 AC_PROG_INSTALL
  87 ACX_PROG_LN
  88 AC_PROG_LN_S
  89 AC_PROG_SED
  90 AC_PROG_AWK
  91
  92 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  93
  94 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  95 # a relative path.
  96 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  97   INSTALL="${srcpwd}/install-sh -c"
  98 fi
  99
 100 # Set srcdir to "." if that's what it is.
 101 # This is important for multilib support.
 102 pwd=`${PWDCMD-pwd}`
 103 if test "${pwd}" = "${srcpwd}" ; then
 104   srcdir=.
 105 fi
 106
 107 topsrcdir=$srcpwd
 108
 109 extra_host_args=
 110
 111 ### To add a new directory to the tree, first choose whether it is a target
 112 ### or a host dependent tool.  Then put it into the appropriate list
 113 ### (library or tools, host or target), doing a dependency sort.
 114
 115 # Subdirs will be configured in the order listed in build_configdirs,
 116 # configdirs, or target_configdirs; see the serialization section below.
 117
 118 # Dependency sorting is only needed when *configuration* must be done in
 119 # a particular order.  In all cases a dependency should be specified in
 120 # the Makefile, whether or not it's implicitly specified here.
 121
 122 # Double entries in build_configdirs, configdirs, or target_configdirs may
 123 # cause circular dependencies and break everything horribly.
 124
 125 # these library is used by various programs built for the build
 126 # environment
 127 #
 128 build_libs="build-libiberty build-libcpp"
 129
 130 # these tools are built for the build environment
 131 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 132
 133 # these libraries are used by various programs built for the host environment
 134 #f
 135 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libcody libdecnumber gmp mpfr mpc isl libelf libiconv libctf"
 136
 137 # these tools are built for the host environment
 138 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 139 # know that we are building the simulator.
 140 # binutils, gas and ld appear in that order because it makes sense to run
 141 # "make check" in that particular order.
 142 # If --enable-gold is used, "gold" may replace "ld".
 143 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gdbserver gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools c++tools"
 144
 145 # these libraries are built for the target environment, and are built after
 146 # the host libraries and the host tools (which may be a cross compiler)
 147 # Note that libiberty is not a target library.
 148 target_libraries="target-libgcc \
 149                 target-libbacktrace \
 150                 target-libgloss \
 151                 target-newlib \
 152                 target-libgomp \
 153                 target-liboffloadmic \
 154                 target-libatomic \
 155                 target-libitm \
 156                 target-libstdc++-v3 \
 157                 target-libsanitizer \
 158                 target-libvtv \
 159                 target-libssp \
 160                 target-libquadmath \
 161                 target-libgfortran \
 162                 target-libffi \
 163                 target-libobjc \
 164                 target-libada \
 165                 target-libgo \
 166                 target-libphobos \
 167                 target-zlib"
 168
 169 # these tools are built using the target libraries, and are intended to
 170 # run only in the target environment
 171 #
 172 # note: any program that *uses* libraries that are in the "target_libraries"
 173 # list belongs in this list.
 174 #
 175 target_tools="target-rda"
 176
 177 ################################################################################
 178
 179 ## All tools belong in one of the four categories, and are assigned above
 180 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 181 ## is important because configure will choke if they ever get through.
 182 ## ${configdirs} is directories we build using the host tools.
 183 ## ${target_configdirs} is directories we build using the target tools.
 184 configdirs=`echo ${host_libs} ${host_tools}`
 185 target_configdirs=`echo ${target_libraries} ${target_tools}`
 186 build_configdirs=`echo ${build_libs} ${build_tools}`
 187
 188 m4_divert_text([PARSE_ARGS],
 189 [case $srcdir in
 190   *" "*)
 191 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 192     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 193 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 194     ;;
 195 esac
 196 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 197 ])
 198
 199 ################################################################################
 200
 201 srcname="gnu development package"
 202
 203 # This gets set non-empty for some net releases of packages.
 204 appdirs=""
 205
 206 # Define is_cross_compiler to save on calls to 'test'.
 207 is_cross_compiler=
 208 if test x"${host}" = x"${target}" ; then
 209   is_cross_compiler=no
 210 else
 211   is_cross_compiler=yes
 212 fi
 213
 214 # Find the build and target subdir names.
 215 GCC_TOPLEV_SUBDIRS
 216 # Be sure to cover against remnants of an in-tree build.
 217 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 218   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 219 Use a pristine source tree when building in a separate tree])
 220 fi
 221
 222 # Skipdirs are removed silently.
 223 skipdirs=
 224 # Noconfigdirs are removed loudly.
 225 noconfigdirs=""
 226
 227 use_gnu_ld=
 228 # Make sure we don't let GNU ld be added if we didn't want it.
 229 if test x$with_gnu_ld = xno ; then
 230   use_gnu_ld=no
 231   noconfigdirs="$noconfigdirs ld gold"
 232 fi
 233
 234 use_gnu_as=
 235 # Make sure we don't let GNU as be added if we didn't want it.
 236 if test x$with_gnu_as = xno ; then
 237   use_gnu_as=no
 238   noconfigdirs="$noconfigdirs gas"
 239 fi
 240
 241 use_included_zlib=
 242 AC_ARG_WITH(system-zlib,
 243 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 244 # Make sure we don't let ZLIB be added if we didn't want it.
 245 if test x$with_system_zlib = xyes ; then
 246   use_included_zlib=no
 247   noconfigdirs="$noconfigdirs zlib"
 248 fi
 249
 250 # some tools are so dependent upon X11 that if we're not building with X,
 251 # it's not even worth trying to configure, much less build, that tool.
 252
 253 case ${with_x} in
 254   yes | "") ;; # the default value for this tree is that X11 is available
 255   no)
 256     skipdirs="${skipdirs} tk itcl libgui"
 257     # We won't be able to build gdbtk without X.
 258     enable_gdbtk=no
 259     ;;
 260   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 261 esac
 262
 263 # Some are only suitable for cross toolchains.
 264 # Remove these if host=target.
 265 cross_only="target-libgloss target-newlib target-opcodes"
 266
 267 case $is_cross_compiler in
 268   no) skipdirs="${skipdirs} ${cross_only}" ;;
 269 esac
 270
 271 # If both --with-headers and --with-libs are specified, default to
 272 # --without-newlib.
 273 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 274    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 275   if test x"${with_newlib}" = x ; then
 276     with_newlib=no
 277   fi
 278 fi
 279
 280 # Recognize --with-newlib/--without-newlib.
 281 case ${with_newlib} in
 282   no) skipdirs="${skipdirs} target-newlib" ;;
 283   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 284 esac
 285
 286 AC_ARG_ENABLE(as-accelerator-for,
 287 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 288                 [build as offload target compiler.
 289                 Specify offload host triple by ARG])])
 290
 291 AC_ARG_ENABLE(offload-targets,
 292 [AS_HELP_STRING([--enable-offload-targets=LIST],
 293                 [enable offloading to devices from comma-separated LIST of
 294                 TARGET[=DIR]. Use optional path to find offload target compiler
 295                 during the build])],
 296 [
 297   if test x"$enable_offload_targets" = x; then
 298     AC_MSG_ERROR([no offload targets specified])
 299   fi
 300 ], [enable_offload_targets=])
 301
 302 AC_ARG_ENABLE(offload-defaulted,
 303 [AS_HELP_STRING([--enable-offload-defaulted]
 304                 [If enabled, configured but not installed offload compilers and
 305                 libgomp plugins are silently ignored.  Useful for distribution
 306                 compilers where those are in separate optional packages.])],
 307 [enable_offload_defaulted=$enableval],
 308 [enable_offload_defaulted=])
 309
 310 # Handle --enable-gold, --enable-ld.
 311 # --disable-gold [--enable-ld]
 312 #     Build only ld.  Default option.
 313 # --enable-gold [--enable-ld]
 314 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 315 #     as "ld.bfd" and "ld".
 316 # --enable-gold=default [--enable-ld]
 317 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 318 #     install ld as "ld.bfd".
 319 # --enable-gold[=default] --disable-ld
 320 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 321 # --enable-gold --enable-ld=default
 322 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 323 #     and ld.bfd).
 324 #     In other words, ld is default
 325 # --enable-gold=default --enable-ld=default
 326 #     Error.
 327
 328 default_ld=
 329 AC_ARG_ENABLE(gold,
 330 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 331                 [build gold @<:@ARG={default,yes,no}@:>@])],
 332 ENABLE_GOLD=$enableval,
 333 ENABLE_GOLD=no)
 334 case "${ENABLE_GOLD}" in
 335   yes|default)
 336     # Check for ELF target.
 337     is_elf=no
 338     case "${target}" in
 339       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 340       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 341       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 342       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 343         case "${target}" in
 344           *-*-linux*aout* | *-*-linux*oldld*)
 345             ;;
 346           *)
 347             is_elf=yes
 348             ;;
 349         esac
 350     esac
 351
 352     if test "$is_elf" = "yes"; then
 353       # Check for target supported by gold.
 354       case "${target}" in
 355         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 356         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-* | loongarch*-*-*)
 357           configdirs="$configdirs gold"
 358           if test x${ENABLE_GOLD} = xdefault; then
 359             default_ld=gold
 360           fi
 361           ENABLE_GOLD=yes
 362           ;;
 363       esac
 364     fi
 365     ;;
 366   no)
 367     ;;
 368   *)
 369     AC_MSG_ERROR([invalid --enable-gold argument])
 370     ;;
 371 esac
 372
 373 AC_ARG_ENABLE(ld,
 374 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 375                 [build ld @<:@ARG={default,yes,no}@:>@])],
 376 ENABLE_LD=$enableval,
 377 ENABLE_LD=yes)
 378
 379 case "${ENABLE_LD}" in
 380   default)
 381     if test x${default_ld} != x; then
 382       AC_MSG_ERROR([either gold or ld can be the default ld])
 383     fi
 384     ;;
 385   yes)
 386     ;;
 387   no)
 388     if test x${ENABLE_GOLD} != xyes; then
 389       AC_MSG_WARN([neither ld nor gold are enabled])
 390     fi
 391     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 392     ;;
 393   *)
 394     AC_MSG_ERROR([invalid --enable-ld argument])
 395     ;;
 396 esac
 397
 398 # PR gas/19109
 399 # Decide the default method for compressing debug sections.
 400 # Provide a configure time option to override our default.
 401 AC_ARG_ENABLE(compressed_debug_sections,
 402 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 403                 [Enable compressed debug sections for gas, gold or ld by
 404                  default])],
 405 [
 406   if test x"$enable_compressed_debug_sections" = xyes; then
 407     AC_MSG_ERROR([no program with compressed debug sections specified])
 408   fi
 409 ], [enable_compressed_debug_sections=])
 410
 411 # Configure extra directories which are host specific
 412
 413 case "${host}" in
 414   *-cygwin*)
 415     configdirs="$configdirs libtermcap" ;;
 416 esac
 417
 418 # A target can indicate whether a language isn't supported for some reason.
 419 # Only spaces may be used in this macro; not newlines or tabs.
 420 unsupported_languages=
 421
 422 # Remove more programs from consideration, based on the host or
 423 # target this usually means that a port of the program doesn't
 424 # exist yet.
 425
 426 case "${host}" in
 427   i[[3456789]]86-*-msdosdjgpp*)
 428     noconfigdirs="$noconfigdirs tcl tk itcl"
 429     ;;
 430 esac
 431
 432
 433 AC_ARG_ENABLE(libquadmath,
 434 AS_HELP_STRING([--disable-libquadmath],
 435   [do not build libquadmath directory]),
 436 ENABLE_LIBQUADMATH=$enableval,
 437 ENABLE_LIBQUADMATH=yes)
 438 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 439   noconfigdirs="$noconfigdirs target-libquadmath"
 440 fi
 441
 442
 443 AC_ARG_ENABLE(libquadmath-support,
 444 AS_HELP_STRING([--disable-libquadmath-support],
 445   [disable libquadmath support for Fortran]),
 446 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 447 ENABLE_LIBQUADMATH_SUPPORT=yes)
 448 enable_libquadmath_support=
 449 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 450   enable_libquadmath_support=no
 451 fi
 452
 453
 454 AC_ARG_ENABLE(libada,
 455 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 456 ENABLE_LIBADA=$enableval,
 457 ENABLE_LIBADA=yes)
 458 if test "${ENABLE_LIBADA}" != "yes" ; then
 459   noconfigdirs="$noconfigdirs gnattools"
 460 fi
 461
 462 AC_ARG_ENABLE(libssp,
 463 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 464 ENABLE_LIBSSP=$enableval,
 465 ENABLE_LIBSSP=yes)
 466
 467 AC_ARG_ENABLE(libstdcxx,
 468 AS_HELP_STRING([--disable-libstdcxx],
 469   [do not build libstdc++-v3 directory]),
 470 ENABLE_LIBSTDCXX=$enableval,
 471 ENABLE_LIBSTDCXX=default)
 472 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 473   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 474 fi]
 475
 476 # If this is accelerator compiler and its target is intelmic we enable
 477 # target liboffloadmic by default.  If this is compiler with offloading
 478 # for intelmic we enable host liboffloadmic by default.  Otherwise
 479 # liboffloadmic is disabled by default.
 480 AC_ARG_ENABLE([liboffloadmic],
 481 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 482                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 483 [case "$enableval" in
 484   no | host | target)
 485     enable_liboffloadmic=$enableval ;;
 486   *)
 487     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 488 esac],
 489 [if test x"$enable_as_accelerator_for" != x; then
 490   case "${target}" in
 491     *-intelmic-* | *-intelmicemul-*)
 492       enable_liboffloadmic=target
 493       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 494       ;;
 495     *)
 496       enable_liboffloadmic=no
 497       ;;
 498   esac
 499 else
 500   case "${enable_offload_targets}" in
 501     *-intelmic-* | *-intelmicemul-*)
 502       enable_liboffloadmic=host
 503       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 504       ;;
 505     *)
 506       enable_liboffloadmic=no
 507       ;;
 508     esac
 509 fi])
 510 AC_SUBST(extra_liboffloadmic_configure_flags)
 511
 512 # Enable libgomp by default on hosted POSIX systems, and a few others.
 513 if test x$enable_libgomp = x ; then
 514     case "${target}" in
 515     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 516         ;;
 517     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 518         ;;
 519     *-*-solaris2* | *-*-hpux11*)
 520         ;;
 521     *-*-darwin* | *-*-aix*)
 522         ;;
 523     nvptx*-*-* | amdgcn*-*-*)
 524         ;;
 525     *)
 526         noconfigdirs="$noconfigdirs target-libgomp"
 527         ;;
 528     esac
 529 fi
 530
 531 # Disable libatomic on unsupported systems.
 532 if test -d ${srcdir}/libatomic; then
 533     if test x$enable_libatomic = x; then
 534         AC_MSG_CHECKING([for libatomic support])
 535         if (srcdir=${srcdir}/libatomic; \
 536                 . ${srcdir}/configure.tgt; \
 537                 test -n "$UNSUPPORTED")
 538         then
 539             AC_MSG_RESULT([no])
 540             noconfigdirs="$noconfigdirs target-libatomic"
 541         else
 542             AC_MSG_RESULT([yes])
 543         fi
 544     fi
 545 fi
 546
 547 # Disable liboffloadmic on unsupported systems.
 548 if test -d ${srcdir}/liboffloadmic; then
 549     if test x$enable_liboffloadmic != xno; then
 550         AC_MSG_CHECKING([for liboffloadmic support])
 551         if (srcdir=${srcdir}/liboffloadmic; \
 552                 . ${srcdir}/configure.tgt; \
 553                 test -n "$UNSUPPORTED")
 554         then
 555             AC_MSG_RESULT([no])
 556             noconfigdirs="$noconfigdirs target-liboffloadmic"
 557         else
 558             AC_MSG_RESULT([yes])
 559         fi
 560     fi
 561 fi
 562
 563 # Disable libitm on unsupported systems.
 564 if test -d ${srcdir}/libitm; then
 565     if test x$enable_libitm = x; then
 566         AC_MSG_CHECKING([for libitm support])
 567         if (srcdir=${srcdir}/libitm; \
 568                 . ${srcdir}/configure.tgt; \
 569                 test -n "$UNSUPPORTED")
 570         then
 571             AC_MSG_RESULT([no])
 572             noconfigdirs="$noconfigdirs target-libitm"
 573         else
 574             AC_MSG_RESULT([yes])
 575         fi
 576     fi
 577 fi
 578
 579 # Disable libsanitizer on unsupported systems.
 580 if test -d ${srcdir}/libsanitizer; then
 581     if test x$enable_libsanitizer = x; then
 582         AC_MSG_CHECKING([for libsanitizer support])
 583         if (srcdir=${srcdir}/libsanitizer; \
 584                 . ${srcdir}/configure.tgt; \
 585                 test -n "$UNSUPPORTED")
 586         then
 587             AC_MSG_RESULT([no])
 588             noconfigdirs="$noconfigdirs target-libsanitizer"
 589         else
 590             AC_MSG_RESULT([yes])
 591         fi
 592     fi
 593 fi
 594
 595 # Disable libvtv on unsupported systems.
 596 if test -d ${srcdir}/libvtv; then
 597     if test x$enable_libvtv = x; then
 598         AC_MSG_CHECKING([for libvtv support])
 599         if (srcdir=${srcdir}/libvtv; \
 600                 . ${srcdir}/configure.tgt; \
 601                 test "$VTV_SUPPORTED" != "yes")
 602         then
 603             AC_MSG_RESULT([no])
 604             noconfigdirs="$noconfigdirs target-libvtv"
 605         else
 606             AC_MSG_RESULT([yes])
 607         fi
 608     fi
 609 fi
 610
 611 # Disable libquadmath for some systems.
 612 case "${target}" in
 613   avr-*-*)
 614     noconfigdirs="$noconfigdirs target-libquadmath"
 615     ;;
 616   # libquadmath is unused on AIX and libquadmath build process use of
 617   # LD_LIBRARY_PATH can break AIX bootstrap.
 618   powerpc-*-aix* | rs6000-*-aix*)
 619     noconfigdirs="$noconfigdirs target-libquadmath"
 620     ;;
 621 esac
 622
 623 # Disable libssp for some systems.
 624 case "${target}" in
 625   avr-*-*)
 626     # No hosted I/O support.
 627     noconfigdirs="$noconfigdirs target-libssp"
 628     ;;
 629   bpf-*-*)
 630     noconfigdirs="$noconfigdirs target-libssp"
 631     ;;
 632   powerpc-*-aix* | rs6000-*-aix*)
 633     noconfigdirs="$noconfigdirs target-libssp"
 634     ;;
 635   pru-*-*)
 636     # No hosted I/O support.
 637     noconfigdirs="$noconfigdirs target-libssp"
 638     ;;
 639   rl78-*-*)
 640     # libssp uses a misaligned load to trigger a fault, but the RL78
 641     # doesn't fault for those - instead, it gives a build-time error
 642     # for explicit misaligned loads.
 643     noconfigdirs="$noconfigdirs target-libssp"
 644     ;;
 645   visium-*-*)
 646     # No hosted I/O support.
 647     noconfigdirs="$noconfigdirs target-libssp"
 648     ;;
 649 esac
 650
 651 # Disable libstdc++-v3 for some systems.
 652 # Allow user to override this if they pass --enable-libstdcxx
 653 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 654   case "${target}" in
 655     *-*-vxworks*)
 656       # VxWorks uses the Dinkumware C++ library.
 657       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 658       ;;
 659     amdgcn*-*-*)
 660       # Not ported/fails to build when using newlib.
 661       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 662       ;;
 663     arm*-wince-pe*)
 664       # the C++ libraries don't build on top of CE's C libraries
 665       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 666       ;;
 667     avr-*-*)
 668       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 669       ;;
 670     bpf-*-*)
 671       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 672       ;;
 673     ft32-*-*)
 674       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 675       ;;
 676   esac
 677 fi
 678
 679 # Disable C++ on systems where it is known to not work.
 680 # For testing, you can override this with --enable-languages=c++.
 681 case ,${enable_languages}, in
 682   *,c++,*)
 683     ;;
 684   *)
 685       case "${target}" in
 686         bpf-*-*)
 687           unsupported_languages="$unsupported_languages c++"
 688           ;;
 689       esac
 690       ;;
 691 esac
 692
 693 # Disable Objc on systems where it is known to not work.
 694 # For testing, you can override this with --enable-languages=objc.
 695 case ,${enable_languages}, in
 696   *,objc,*)
 697     ;;
 698   *)
 699       case "${target}" in
 700         bpf-*-*)
 701           unsupported_languages="$unsupported_languages objc"
 702           ;;
 703       esac
 704       ;;
 705 esac
 706
 707 # Disable D on systems where it is known to not work.
 708 # For testing, you can override this with --enable-languages=d.
 709 case ,${enable_languages}, in
 710   *,d,*)
 711     ;;
 712   *)
 713     case "${target}" in
 714       bpf-*-*)
 715         unsupported_languages="$unsupported_languages d"
 716         ;;
 717     esac
 718     ;;
 719 esac
 720
 721 # Disable libphobos on unsupported systems.
 722 # For testing, you can override this with --enable-libphobos.
 723 if test -d ${srcdir}/libphobos; then
 724     if test x$enable_libphobos = x; then
 725         AC_MSG_CHECKING([for libphobos support])
 726         if (srcdir=${srcdir}/libphobos; \
 727                 . ${srcdir}/configure.tgt; \
 728                 test "$LIBPHOBOS_SUPPORTED" != "yes")
 729         then
 730             AC_MSG_RESULT([no])
 731             noconfigdirs="$noconfigdirs target-libphobos"
 732         else
 733             AC_MSG_RESULT([yes])
 734         fi
 735     fi
 736 fi
 737
 738 # Disable Fortran for some systems.
 739 case "${target}" in
 740   mmix-*-*)
 741     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 742     unsupported_languages="$unsupported_languages fortran"
 743     ;;
 744   bpf-*-*)
 745     unsupported_languages="$unsupported_languages fortran"
 746     ;;
 747 esac
 748
 749 # Disable libffi for some systems.
 750 case "${target}" in
 751   powerpc-*-darwin*)
 752     ;;
 753   i[[3456789]]86-*-darwin*)
 754     ;;
 755   x86_64-*-darwin[[912]]*)
 756     ;;
 757   *-*-darwin*)
 758     noconfigdirs="$noconfigdirs target-libffi"
 759     ;;
 760   *-*-netware*)
 761     noconfigdirs="$noconfigdirs target-libffi"
 762     ;;
 763   *-*-phoenix*)
 764     noconfigdirs="$noconfigdirs target-libffi"
 765     ;;
 766   *-*-rtems*)
 767     noconfigdirs="$noconfigdirs target-libffi"
 768     ;;
 769   *-*-tpf*)
 770     noconfigdirs="$noconfigdirs target-libffi"
 771     ;;
 772   *-*-uclinux*)
 773     noconfigdirs="$noconfigdirs target-libffi"
 774     ;;
 775   *-*-vxworks*)
 776     noconfigdirs="$noconfigdirs target-libffi"
 777     ;;
 778   aarch64*-*-freebsd*)
 779     noconfigdirs="$noconfigdirs target-libffi"
 780     ;;
 781   alpha*-*-*vms*)
 782     noconfigdirs="$noconfigdirs target-libffi"
 783     ;;
 784   arm*-*-freebsd*)
 785     noconfigdirs="$noconfigdirs target-libffi"
 786     ;;
 787   arm-wince-pe)
 788     noconfigdirs="$noconfigdirs target-libffi"
 789     ;;
 790   arm*-*-symbianelf*)
 791     noconfigdirs="$noconfigdirs target-libffi"
 792     ;;
 793   bpf-*-*)
 794     noconfigdirs="$noconfigdirs target-libffi"
 795     ;;
 796   cris-*-* | crisv32-*-*)
 797     case "${target}" in
 798       *-*-linux*)
 799         ;;
 800       *) # See PR46792 regarding target-libffi.
 801         noconfigdirs="$noconfigdirs target-libffi";;
 802     esac
 803     ;;
 804   hppa*64*-*-hpux*)
 805     noconfigdirs="$noconfigdirs target-libffi"
 806     ;;
 807   hppa*-hp-hpux11*)
 808     ;;
 809   hppa*-*-hpux*)
 810     noconfigdirs="$noconfigdirs target-libffi"
 811     ;;
 812   ia64*-*-*vms*)
 813     noconfigdirs="$noconfigdirs target-libffi"
 814     ;;
 815   i[[3456789]]86-w64-mingw*)
 816     noconfigdirs="$noconfigdirs target-libffi"
 817     ;;
 818   i[[3456789]]86-*-mingw*)
 819     noconfigdirs="$noconfigdirs target-libffi"
 820     ;;
 821   x86_64-*-mingw*)
 822     noconfigdirs="$noconfigdirs target-libffi"
 823     ;;
 824   mmix-*-*)
 825     noconfigdirs="$noconfigdirs target-libffi"
 826     ;;
 827   powerpc-*-aix*)
 828     ;;
 829   rs6000-*-aix*)
 830     ;;
 831   ft32-*-*)
 832     noconfigdirs="$noconfigdirs target-libffi"
 833     ;;
 834   *-*-lynxos*)
 835     noconfigdirs="$noconfigdirs target-libffi"
 836     ;;
 837 esac
 838
 839 # Disable the go frontend on systems where it is known to not work. Please keep
 840 # this in sync with contrib/config-list.mk.
 841 case "${target}" in
 842 *-*-darwin* | *-*-cygwin* | *-*-mingw* | bpf-* )
 843     unsupported_languages="$unsupported_languages go"
 844     ;;
 845 esac
 846
 847 # Only allow gdbserver on some systems.
 848 if test -d ${srcdir}/gdbserver; then
 849     if test x$enable_gdbserver = x; then
 850         AC_MSG_CHECKING([for gdbserver support])
 851         if (srcdir=${srcdir}/gdbserver; \
 852                 . ${srcdir}/configure.srv; \
 853                 test -n "$UNSUPPORTED")
 854         then
 855             AC_MSG_RESULT([no])
 856             noconfigdirs="$noconfigdirs gdbserver"
 857         else
 858             AC_MSG_RESULT([yes])
 859         fi
 860     fi
 861 fi
 862
 863 # Disable libgo for some systems where it is known to not work.
 864 # For testing, you can easily override this with --enable-libgo.
 865 if test x$enable_libgo = x; then
 866     case "${target}" in
 867     *-*-darwin*)
 868         # PR 46986
 869         noconfigdirs="$noconfigdirs target-libgo"
 870         ;;
 871     *-*-cygwin* | *-*-mingw*)
 872         noconfigdirs="$noconfigdirs target-libgo"
 873         ;;
 874     bpf-*-*)
 875         noconfigdirs="$noconfigdirs target-libgo"
 876         ;;
 877     esac
 878 fi
 879
 880 # Default libgloss CPU subdirectory.
 881 libgloss_dir="$target_cpu"
 882
 883 case "${target}" in
 884   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 885     libgloss_dir=wince
 886     ;;
 887   aarch64*-*-* )
 888     libgloss_dir=aarch64
 889     ;;
 890   arm*-*-*)
 891     libgloss_dir=arm
 892     ;;
 893   cris-*-* | crisv32-*-*)
 894     libgloss_dir=cris
 895     ;;
 896   hppa*-*-*)
 897     libgloss_dir=pa
 898     ;;
 899   i[[3456789]]86-*-*)
 900     libgloss_dir=i386
 901     ;;
 902   loongarch*-*-*)
 903     libgloss_dir=loongarch
 904     ;;
 905   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 906     libgloss_dir=m68hc11
 907     ;;
 908   m68*-*-* | fido-*-*)
 909     libgloss_dir=m68k
 910     ;;
 911   mips*-*-*)
 912     libgloss_dir=mips
 913     ;;
 914   powerpc*-*-*)
 915     libgloss_dir=rs6000
 916     ;;
 917   pru-*-*)
 918     libgloss_dir=pru
 919     ;;
 920   sparc*-*-*)
 921     libgloss_dir=sparc
 922     ;;
 923 esac
 924
 925 # Disable newlib and libgloss for various target OSes.
 926 case "${target}" in
 927   alpha*-dec-osf*)
 928     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 929     ;;
 930   i[[3456789]]86-*-linux*)
 931     # This section makes it possible to build newlib natively on linux.
 932     # If we are using a cross compiler then don't configure newlib.
 933     if test x${is_cross_compiler} != xno ; then
 934       noconfigdirs="$noconfigdirs target-newlib"
 935     fi
 936     noconfigdirs="$noconfigdirs target-libgloss"
 937     # If we are not using a cross compiler, do configure newlib.
 938     # Note however, that newlib will only be configured in this situation
 939     # if the --with-newlib option has been given, because otherwise
 940     # 'target-newlib' will appear in skipdirs.
 941     ;;
 942   i[[3456789]]86-*-rdos*)
 943     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 944     ;;
 945   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 946     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 947     ;;
 948   sparc-*-sunos4*)
 949     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 950     ;;
 951   bpf-*-*)
 952     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 953     ;;
 954   *-*-aix*)
 955     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 956     ;;
 957   *-*-beos*)
 958     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 959     ;;
 960   *-*-chorusos)
 961     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 962     ;;
 963   *-*-dragonfly*)
 964     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 965     ;;
 966   *-*-freebsd*)
 967     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 968     ;;
 969   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 970     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 971     ;;
 972   *-*-lynxos*)
 973     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 974     ;;
 975   *-*-mingw*)
 976     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 977     ;;
 978   *-*-netbsd*)
 979     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 980     ;;
 981   *-*-netware*)
 982     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 983     ;;
 984   *-*-tpf*)
 985     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 986     ;;
 987   *-*-uclinux*)
 988     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 989     ;;
 990   *-*-vxworks*)
 991     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 992     ;;
 993 esac
 994
 995 case "${target}" in
 996   *-*-chorusos)
 997     ;;
 998   aarch64-*-darwin*)
 999     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1000     noconfigdirs="$noconfigdirs sim target-rda"
1001     ;;
1002   amdgcn*-*-*)
1003     ;;
1004   arm-*-darwin*)
1005     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1006     noconfigdirs="$noconfigdirs sim target-rda"
1007     ;;
1008   powerpc-*-darwin*)
1009     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1010     noconfigdirs="$noconfigdirs sim target-rda"
1011     ;;
1012   i[[3456789]]86-*-darwin*)
1013     noconfigdirs="$noconfigdirs ld gprof"
1014     noconfigdirs="$noconfigdirs sim target-rda"
1015     ;;
1016   x86_64-*-darwin[[912]]*)
1017     noconfigdirs="$noconfigdirs ld gas gprof"
1018     noconfigdirs="$noconfigdirs sim target-rda"
1019     ;;
1020   *-*-darwin*)
1021     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1022     noconfigdirs="$noconfigdirs sim target-rda"
1023     ;;
1024   *-*-dragonfly*)
1025     ;;
1026   *-*-freebsd*)
1027     if test "x$with_gmp" = x \
1028         && ! test -d ${srcdir}/gmp \
1029         && test -f /usr/local/include/gmp.h; then
1030       with_gmp=/usr/local
1031     fi
1032     ;;
1033   *-*-kaos*)
1034     # Remove unsupported stuff on all kaOS configurations.
1035     noconfigdirs="$noconfigdirs target-libgloss"
1036     ;;
1037   *-*-netbsd*)
1038     ;;
1039   *-*-netware*)
1040     ;;
1041   *-*-phoenix*)
1042     noconfigdirs="$noconfigdirs target-libgloss"
1043     ;;
1044   *-*-rtems*)
1045     noconfigdirs="$noconfigdirs target-libgloss"
1046     ;;
1047     # The tpf target doesn't support gdb yet.
1048   *-*-tpf*)
1049     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
1050     ;;
1051   *-*-uclinux*)
1052     noconfigdirs="$noconfigdirs target-rda"
1053     ;;
1054   *-*-vxworks*)
1055     ;;
1056   alpha*-dec-osf*)
1057     # ld works, but does not support shared libraries.
1058     # gas doesn't generate exception information.
1059     noconfigdirs="$noconfigdirs gas ld"
1060     ;;
1061   alpha*-*-*vms*)
1062     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1063     ;;
1064   alpha*-*-*)
1065     # newlib is not 64 bit ready
1066     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1067     ;;
1068   bpf-*-*)
1069     noconfigdirs="$noconfigdirs target-libobjc target-libbacktrace"
1070     ;;
1071   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1072     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1073     ;;
1074   arc*-*-*)
1075     noconfigdirs="$noconfigdirs sim"
1076     ;;
1077   arm-*-pe*)
1078     noconfigdirs="$noconfigdirs target-libgloss"
1079     ;;
1080   arm-*-riscix*)
1081     noconfigdirs="$noconfigdirs ld target-libgloss"
1082     ;;
1083   avr-*-*)
1084     if test x${with_avrlibc} != xno; then
1085       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1086     fi
1087     ;;
1088   c4x-*-* | tic4x-*-*)
1089     noconfigdirs="$noconfigdirs target-libgloss"
1090     ;;
1091   tic54x-*-*)
1092     noconfigdirs="$noconfigdirs target-libgloss gdb"
1093     ;;
1094   d10v-*-*)
1095     noconfigdirs="$noconfigdirs target-libgloss"
1096     ;;
1097   d30v-*-*)
1098     noconfigdirs="$noconfigdirs gdb"
1099     ;;
1100   fr30-*-elf*)
1101     noconfigdirs="$noconfigdirs gdb"
1102     ;;
1103   ft32-*-*)
1104     noconfigdirs="$noconfigdirs target-rda gprof"
1105     ;;
1106   moxie-*-*)
1107     noconfigdirs="$noconfigdirs"
1108     ;;
1109   h8300*-*-*)
1110     noconfigdirs="$noconfigdirs target-libgloss"
1111     ;;
1112   h8500-*-*)
1113     noconfigdirs="$noconfigdirs target-libgloss"
1114     ;;
1115   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1116     ;;
1117   hppa*64*-*-hpux*)
1118     noconfigdirs="$noconfigdirs gdb"
1119     ;;
1120   hppa*-*-hpux11*)
1121     noconfigdirs="$noconfigdirs gdb ld"
1122     ;;
1123   hppa*64*-*-linux*)
1124     ;;
1125   hppa*-*-linux*)
1126     ;;
1127   hppa*-*-*elf* | \
1128   hppa*-*-lites* | \
1129   hppa*-*-openbsd* | \
1130   hppa*64*-*-*)
1131     ;;
1132   hppa*-*-pro*)
1133     ;;
1134   hppa*-*-*)
1135     noconfigdirs="$noconfigdirs ld"
1136     ;;
1137   i960-*-*)
1138     noconfigdirs="$noconfigdirs gdb"
1139     ;;
1140   ia64*-*-elf*)
1141     # No gdb support yet.
1142     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1143     ;;
1144   ia64*-**-hpux*)
1145     # No ld support yet.
1146     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1147     ;;
1148   ia64*-*-*vms*)
1149     # No ld support yet.
1150     noconfigdirs="$noconfigdirs libgui itcl ld"
1151     ;;
1152   i[[3456789]]86-w64-mingw*)
1153     ;;
1154   i[[3456789]]86-*-mingw*)
1155     target_configdirs="$target_configdirs target-winsup"
1156     ;;
1157   *-*-cygwin*)
1158     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1159     noconfigdirs="$noconfigdirs target-libgloss"
1160     # always build newlib if winsup directory is present.
1161     if test -d "$srcdir/winsup/cygwin"; then
1162       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1163     elif test -d "$srcdir/newlib"; then
1164       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1165     fi
1166     ;;
1167   i[[3456789]]86-*-pe)
1168     noconfigdirs="$noconfigdirs target-libgloss"
1169     ;;
1170   i[[3456789]]86-*-sco3.2v5*)
1171     # The linker does not yet know about weak symbols in COFF,
1172     # and is not configured to handle mixed ELF and COFF.
1173     noconfigdirs="$noconfigdirs ld target-libgloss"
1174     ;;
1175   i[[3456789]]86-*-sco*)
1176     noconfigdirs="$noconfigdirs gprof target-libgloss"
1177     ;;
1178   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1179     noconfigdirs="$noconfigdirs target-libgloss"
1180     ;;
1181   i[[3456789]]86-*-sysv4*)
1182     noconfigdirs="$noconfigdirs target-libgloss"
1183     ;;
1184   i[[3456789]]86-*-beos*)
1185     noconfigdirs="$noconfigdirs gdb"
1186     ;;
1187   i[[3456789]]86-*-rdos*)
1188     noconfigdirs="$noconfigdirs gdb"
1189     ;;
1190   mmix-*-*)
1191     noconfigdirs="$noconfigdirs gdb"
1192     ;;
1193   mt-*-*)
1194     noconfigdirs="$noconfigdirs sim"
1195     ;;
1196   nfp-*-*)
1197     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1198     noconfigdirs="$noconfigdirs $target_libraries"
1199     ;;
1200   pdp11-*-*)
1201     noconfigdirs="$noconfigdirs gdb gprof"
1202     ;;
1203   powerpc-*-aix*)
1204     # copied from rs6000-*-* entry
1205     noconfigdirs="$noconfigdirs gprof"
1206     ;;
1207   powerpc*-*-winnt* | powerpc*-*-pe*)
1208     target_configdirs="$target_configdirs target-winsup"
1209     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1210     # always build newlib.
1211     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1212     ;;
1213     # This is temporary until we can link against shared libraries
1214   powerpcle-*-solaris*)
1215     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1216     ;;
1217   powerpc-*-beos*)
1218     noconfigdirs="$noconfigdirs gdb"
1219     ;;
1220   rs6000-*-lynxos*)
1221     noconfigdirs="$noconfigdirs gprof"
1222     ;;
1223   rs6000-*-aix*)
1224     noconfigdirs="$noconfigdirs gprof"
1225     ;;
1226   rs6000-*-*)
1227     noconfigdirs="$noconfigdirs gprof"
1228     ;;
1229   m68k-apollo-*)
1230     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1231     ;;
1232   microblaze*)
1233     noconfigdirs="$noconfigdirs gprof"
1234     ;;
1235   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1236     if test x$with_newlib = xyes; then
1237       noconfigdirs="$noconfigdirs gprof"
1238     fi
1239     ;;
1240   mips*-*-irix5*)
1241     noconfigdirs="$noconfigdirs gprof target-libgloss"
1242     ;;
1243   mips*-*-irix6*)
1244     noconfigdirs="$noconfigdirs gprof target-libgloss"
1245     ;;
1246   mips*-*-bsd*)
1247     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1248     ;;
1249   mips*-*-linux*)
1250     ;;
1251   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1252   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1253     noconfigdirs="$noconfigdirs ld gas gprof"
1254     ;;
1255   mips*-*-*)
1256     noconfigdirs="$noconfigdirs gprof"
1257     ;;
1258   nvptx*-*-*)
1259     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1260     ;;
1261   sh-*-*)
1262     case "${target}" in
1263       sh*-*-elf)
1264          ;;
1265       *)
1266          noconfigdirs="$noconfigdirs target-libgloss" ;;
1267     esac
1268     ;;
1269   sparc-*-sunos4*)
1270     if test x${is_cross_compiler} = xno ; then
1271            use_gnu_ld=no
1272     fi
1273     ;;
1274   tic6x-*-*)
1275     noconfigdirs="$noconfigdirs sim"
1276     ;;
1277   tilepro*-*-* | tilegx*-*-*)
1278     noconfigdirs="$noconfigdirs sim"
1279     ;;
1280   v810-*-*)
1281     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1282     ;;
1283   vax-*-*)
1284     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1285     ;;
1286   wasm32-*-*)
1287     noconfigdirs="$noconfigdirs ld"
1288     ;;
1289   loongarch*-*-linux*)
1290     ;;
1291   loongarch*-*-*)
1292     noconfigdirs="$noconfigdirs gprof"
1293     ;;
1294 esac
1295
1296 # If we aren't building newlib, then don't build libgloss, since libgloss
1297 # depends upon some newlib header files.
1298 case "${noconfigdirs}" in
1299   *target-libgloss*) ;;
1300   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1301 esac
1302
1303 # Work in distributions that contain no compiler tools, like Autoconf.
1304 host_makefile_frag=/dev/null
1305 if test -d ${srcdir}/config ; then
1306 case "${host}" in
1307   i[[3456789]]86-*-msdosdjgpp*)
1308     host_makefile_frag="config/mh-djgpp"
1309     ;;
1310   *-cygwin*)
1311     ACX_CHECK_CYGWIN_CAT_WORKS
1312     host_makefile_frag="config/mh-cygwin"
1313     ;;
1314   *-mingw*)
1315     host_makefile_frag="config/mh-mingw"
1316     ;;
1317   alpha*-linux*)
1318     host_makefile_frag="config/mh-alpha-linux"
1319     ;;
1320   hppa*-hp-hpux10*)
1321     host_makefile_frag="config/mh-pa-hpux10"
1322     ;;
1323   hppa*-hp-hpux*)
1324     host_makefile_frag="config/mh-pa"
1325     ;;
1326   hppa*-*)
1327     host_makefile_frag="config/mh-pa"
1328     ;;
1329   i?86-*-darwin[[89]]* | i?86-*-darwin1[[0-7]]* | powerpc*-*-darwin*)
1330     host_makefile_frag="config/mh-darwin"
1331     ;;
1332   powerpc-*-aix*)
1333     host_makefile_frag="config/mh-ppc-aix"
1334     ;;
1335   rs6000-*-aix*)
1336     host_makefile_frag="config/mh-ppc-aix"
1337     ;;
1338 esac
1339 fi
1340
1341 if test "${build}" != "${host}" ; then
1342   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1343   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1344   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1345   CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CC_FOR_BUILD) -E}"
1346   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1347   DSYMUTIL_FOR_BUILD=${DSYMUTIL_FOR_BUILD-dsymutil}
1348   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1349   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1350   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1351   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1352   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1353   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1354   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1355   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1356   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1357 else
1358   AR_FOR_BUILD="\$(AR)"
1359   AS_FOR_BUILD="\$(AS)"
1360   CC_FOR_BUILD="\$(CC)"
1361   CXX_FOR_BUILD="\$(CXX)"
1362   DSYMUTIL_FOR_BUILD="\$(DSYMUTIL)"
1363   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1364   GOC_FOR_BUILD="\$(GOC)"
1365   GDC_FOR_BUILD="\$(GDC)"
1366   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1367   LD_FOR_BUILD="\$(LD)"
1368   NM_FOR_BUILD="\$(NM)"
1369   RANLIB_FOR_BUILD="\$(RANLIB)"
1370   WINDRES_FOR_BUILD="\$(WINDRES)"
1371   WINDMC_FOR_BUILD="\$(WINDMC)"
1372 fi
1373
1374 AC_PROG_CC_C99
1375 AC_PROG_CXX
1376
1377 # We must set the default linker to the linker used by gcc for the correct
1378 # operation of libtool.  If LD is not defined and we are using gcc, try to
1379 # set the LD default to the ld used by gcc.
1380 if test -z "$LD"; then
1381   if test "$GCC" = yes; then
1382     case $build in
1383     *-*-mingw*)
1384       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1385     *)
1386       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1387     esac
1388     case $gcc_prog_ld in
1389     # Accept absolute paths.
1390     [[\\/]* | [A-Za-z]:[\\/]*)]
1391       LD="$gcc_prog_ld" ;;
1392     esac
1393   fi
1394 fi
1395
1396 # Check whether -static-libstdc++ -static-libgcc is supported.
1397 have_static_libs=no
1398 if test "$GCC" = yes; then
1399   saved_LDFLAGS="$LDFLAGS"
1400
1401   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1402   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1403   AC_LANG_PUSH(C++)
1404   AC_LINK_IFELSE([AC_LANG_SOURCE([
1405 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1406 #error -static-libstdc++ not implemented
1407 #endif
1408 int main() {}])],
1409     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1410     [AC_MSG_RESULT([no])])
1411   AC_LANG_POP(C++)
1412
1413   LDFLAGS="$saved_LDFLAGS"
1414 fi
1415
1416 ACX_PROG_GNAT
1417 ACX_PROG_GDC
1418 ACX_PROG_CMP_IGNORE_INITIAL
1419
1420 AC_ARG_ENABLE([bootstrap],
1421 [AS_HELP_STRING([--enable-bootstrap],
1422                 [enable bootstrapping @<:@yes if native build@:>@])],,
1423 enable_bootstrap=default)
1424
1425 # Issue errors and warnings for invalid/strange bootstrap combinations.
1426 if test -r $srcdir/gcc/configure; then
1427   have_compiler=yes
1428 else
1429   have_compiler=no
1430 fi
1431
1432 case "$have_compiler:$host:$target:$enable_bootstrap" in
1433   *:*:*:no) ;;
1434
1435   # Default behavior.  Enable bootstrap if we have a compiler
1436   # and we are in a native configuration.
1437   yes:$build:$build:default)
1438     enable_bootstrap=yes ;;
1439
1440   *:*:*:default)
1441     enable_bootstrap=no ;;
1442
1443   # We have a compiler and we are in a native configuration, bootstrap is ok
1444   yes:$build:$build:yes)
1445     ;;
1446
1447   # Other configurations, but we have a compiler.  Assume the user knows
1448   # what he's doing.
1449   yes:*:*:yes)
1450     AC_MSG_WARN([trying to bootstrap a cross compiler])
1451     ;;
1452
1453   # No compiler: if they passed --enable-bootstrap explicitly, fail
1454   no:*:*:yes)
1455     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1456
1457   # Fail if wrong command line
1458   *)
1459     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1460     ;;
1461 esac
1462
1463 # When bootstrapping with GCC, build stage 1 in C++11 mode to ensure that a
1464 # C++11 compiler can still start the bootstrap.  Otherwise, if building GCC,
1465 # require C++11 (or higher).
1466 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1467   CXX="$CXX -std=c++11"
1468 elif test "$have_compiler" = yes; then
1469   AX_CXX_COMPILE_STDCXX(11)
1470
1471   if test "${build}" != "${host}"; then
1472     AX_CXX_COMPILE_STDCXX(11, [], [], [_FOR_BUILD])
1473   fi
1474 fi
1475
1476 AC_ARG_ENABLE([pgo-build],
1477 [AS_HELP_STRING([--enable-pgo-build[[=lto]]],
1478                 [enable the PGO build])],
1479 [enable_pgo_build=$enableval],
1480 [enable_pgo_build=no])
1481
1482 # Issue errors and warnings for invalid/strange PGO build combinations.
1483 case "$have_compiler:$host:$target:$enable_pgo_build" in
1484   *:*:*:no) ;;
1485
1486   # Allow the PGO build only if we aren't building a compiler and
1487   # we are in a native configuration.
1488   no:$build:$build:yes | no:$build:$build:lto) ;;
1489
1490   # Disallow the PGO bootstrap if we are building a compiler.
1491   yes:*:*:yes | yes:*:*:lto)
1492     AC_MSG_ERROR([cannot perform the PGO bootstrap when building a compiler]) ;;
1493
1494   *)
1495     AC_MSG_ERROR([invalid option for --enable-pgo-build])
1496     ;;
1497 esac
1498
1499 if test "$enable_pgo_build" != "no"; then
1500   AC_MSG_CHECKING([whether the compiler supports -fprofile-generate])
1501   old_CFLAGS="$CFLAGS"
1502   PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
1503   CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
1504   AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1505                     [PGO_BUILD_GEN_CFLAGS=])
1506   CFLAGS="$old_CFLAGS"
1507   if test -n "$PGO_BUILD_GEN_CFLAGS"; then
1508     AC_MSG_RESULT([yes])
1509     PGO_BUILD_USE_CFLAGS="-fprofile-use"
1510   else
1511     AC_MSG_RESULT([no])
1512     AC_MSG_ERROR([cannot perform the PGO build without -fprofile-generate])
1513   fi
1514
1515   if test "$enable_pgo_build" = "lto"; then
1516     AC_MSG_CHECKING([whether the compiler supports -flto=jobserver -ffat-lto-objects])
1517     old_CFLAGS="$CFLAGS"
1518     PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
1519     CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
1520     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1521                       [PGO_BUILD_LTO_CFLAGS=])
1522     CFLAGS="$old_CFLAGS"
1523     if test -n "$PGO_BUILD_LTO_CFLAGS"; then
1524       AC_MSG_RESULT([yes])
1525     else
1526       AC_MSG_RESULT([no])
1527       AC_MSG_WARN([LTO is disabled for the PGO build])
1528     fi
1529   fi
1530 fi
1531 AC_SUBST(PGO_BUILD_GEN_CFLAGS)
1532 AC_SUBST(PGO_BUILD_USE_CFLAGS)
1533 AC_SUBST(PGO_BUILD_LTO_CFLAGS)
1534
1535 # Used for setting $lt_cv_objdir
1536 _LT_CHECK_OBJDIR
1537
1538 # Check for GMP, MPFR and MPC
1539 gmplibs="-lmpc -lmpfr -lgmp"
1540 gmpinc=
1541 have_gmp=no
1542
1543 # Specify a location for mpc
1544 # check for this first so it ends up on the link line before mpfr.
1545 AC_ARG_WITH(mpc,
1546 [AS_HELP_STRING([--with-mpc=PATH],
1547                 [specify prefix directory for installed MPC package.
1548                  Equivalent to --with-mpc-include=PATH/include
1549                  plus --with-mpc-lib=PATH/lib])])
1550 AC_ARG_WITH(mpc-include,
1551 [AS_HELP_STRING([--with-mpc-include=PATH],
1552                 [specify directory for installed MPC include files])])
1553 AC_ARG_WITH(mpc-lib,
1554 [AS_HELP_STRING([--with-mpc-lib=PATH],
1555                 [specify directory for the installed MPC library])])
1556
1557 if test "x$with_mpc" != x; then
1558   gmplibs="-L$with_mpc/lib $gmplibs"
1559   gmpinc="-I$with_mpc/include $gmpinc"
1560 fi
1561 if test "x$with_mpc_include" != x; then
1562   gmpinc="-I$with_mpc_include $gmpinc"
1563 fi
1564 if test "x$with_mpc_lib" != x; then
1565   gmplibs="-L$with_mpc_lib $gmplibs"
1566 fi
1567 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1568   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1569   gmpinc='-I$$s/mpc/src '"$gmpinc"
1570   # Do not test the mpc version.  Assume that it is sufficient, since
1571   # it is in the source tree, and the library has not been built yet
1572   # but it would be included on the link line in the version check below
1573   # hence making the test fail.
1574   have_gmp=yes
1575 fi
1576
1577 # Specify a location for mpfr
1578 # check for this first so it ends up on the link line before gmp.
1579 AC_ARG_WITH(mpfr,
1580 [AS_HELP_STRING([--with-mpfr=PATH],
1581                 [specify prefix directory for installed MPFR package.
1582                  Equivalent to --with-mpfr-include=PATH/include
1583                  plus --with-mpfr-lib=PATH/lib])])
1584 AC_ARG_WITH(mpfr-include,
1585 [AS_HELP_STRING([--with-mpfr-include=PATH],
1586                 [specify directory for installed MPFR include files])])
1587 AC_ARG_WITH(mpfr-lib,
1588 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1589                 [specify directory for the installed MPFR library])])
1590
1591 if test "x$with_mpfr" != x; then
1592   gmplibs="-L$with_mpfr/lib $gmplibs"
1593   gmpinc="-I$with_mpfr/include $gmpinc"
1594 fi
1595 if test "x$with_mpfr_include" != x; then
1596   gmpinc="-I$with_mpfr_include $gmpinc"
1597 fi
1598 if test "x$with_mpfr_lib" != x; then
1599   gmplibs="-L$with_mpfr_lib $gmplibs"
1600 fi
1601 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1602   # MPFR v3.1.0 moved the sources into a src sub-directory.
1603   if ! test -d ${srcdir}/mpfr/src; then
1604     AC_MSG_ERROR([dnl
1605 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1606   fi
1607   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1608   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1609   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1610   # Do not test the mpfr version.  Assume that it is sufficient, since
1611   # it is in the source tree, and the library has not been built yet
1612   # but it would be included on the link line in the version check below
1613   # hence making the test fail.
1614   have_gmp=yes
1615 fi
1616
1617 # Specify a location for gmp
1618 AC_ARG_WITH(gmp,
1619 [AS_HELP_STRING([--with-gmp=PATH],
1620                 [specify prefix directory for the installed GMP package.
1621                  Equivalent to --with-gmp-include=PATH/include
1622                  plus --with-gmp-lib=PATH/lib])])
1623 AC_ARG_WITH(gmp-include,
1624 [AS_HELP_STRING([--with-gmp-include=PATH],
1625                 [specify directory for installed GMP include files])])
1626 AC_ARG_WITH(gmp-lib,
1627 [AS_HELP_STRING([--with-gmp-lib=PATH],
1628                 [specify directory for the installed GMP library])])
1629
1630
1631 if test "x$with_gmp" != x; then
1632   gmplibs="-L$with_gmp/lib $gmplibs"
1633   gmpinc="-I$with_gmp/include $gmpinc"
1634 fi
1635 if test "x$with_gmp_include" != x; then
1636   gmpinc="-I$with_gmp_include $gmpinc"
1637 fi
1638 if test "x$with_gmp_lib" != x; then
1639   gmplibs="-L$with_gmp_lib $gmplibs"
1640 fi
1641 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1642   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1643   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1644   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1645   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1646   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1647   # Do not test the gmp version.  Assume that it is sufficient, since
1648   # it is in the source tree, and the library has not been built yet
1649   # but it would be included on the link line in the version check below
1650   # hence making the test fail.
1651   have_gmp=yes
1652 fi
1653
1654 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1655   have_gmp=yes
1656   saved_CFLAGS="$CFLAGS"
1657   CFLAGS="$CFLAGS $gmpinc"
1658   # Check for the recommended and required versions of GMP.
1659   AC_MSG_CHECKING([for the correct version of gmp.h])
1660   AC_TRY_COMPILE([#include "gmp.h"],[
1661   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1662   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1663   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1664   choke me
1665   #endif
1666   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1667   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1668   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1669   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1670   choke me
1671   #endif
1672   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1673    [AC_MSG_RESULT([no]); have_gmp=no])
1674
1675   # If we have GMP, check the MPFR version.
1676   if test x"$have_gmp" = xyes; then
1677     # Check for the recommended and required versions of MPFR.
1678     AC_MSG_CHECKING([for the correct version of mpfr.h])
1679     AC_TRY_COMPILE([#include <gmp.h>
1680     #include <mpfr.h>],[
1681     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,0)
1682     choke me
1683     #endif
1684     ], [AC_TRY_COMPILE([#include <gmp.h>
1685     #include <mpfr.h>],[
1686     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,6)
1687     choke me
1688     #endif
1689     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1690      [AC_MSG_RESULT([no]); have_gmp=no])
1691   fi
1692
1693   # Check for the MPC header version.
1694   if test x"$have_gmp" = xyes ; then
1695     # Check for the recommended and required versions of MPC.
1696     AC_MSG_CHECKING([for the correct version of mpc.h])
1697     AC_TRY_COMPILE([#include <mpc.h>],[
1698     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1699     choke me
1700     #endif
1701     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1702     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1703     choke me
1704     #endif
1705     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1706      [AC_MSG_RESULT([no]); have_gmp=no])
1707   fi
1708
1709   # Now check the MPFR library.
1710   if test x"$have_gmp" = xyes; then
1711     saved_LIBS="$LIBS"
1712     LIBS="$LIBS $gmplibs"
1713     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1714     AC_TRY_LINK([#include <mpc.h>],[
1715     mpfr_t n;
1716     mpfr_t x;
1717     mpc_t c;
1718     int t;
1719     mpfr_init (n);
1720     mpfr_init (x);
1721     mpfr_atan2 (n, n, x, MPFR_RNDN);
1722     mpfr_erfc (n, x, MPFR_RNDN);
1723     mpfr_subnormalize (x, t, MPFR_RNDN);
1724     mpfr_clear(n);
1725     mpfr_clear(x);
1726     mpc_init2 (c, 53);
1727     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1728     mpc_cosh (c, c, MPC_RNDNN);
1729     mpc_pow (c, c, c, MPC_RNDNN);
1730     mpc_acosh (c, c, MPC_RNDNN);
1731     mpc_clear (c);
1732     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1733     LIBS="$saved_LIBS"
1734   fi
1735
1736   CFLAGS="$saved_CFLAGS"
1737
1738 # The library versions listed in the error message below should match
1739 # the HARD-minimums enforced above.
1740   if test x$have_gmp != xyes; then
1741     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 3.1.0+ and MPC 0.8.0+.
1742 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1743 their locations.  Source code for these libraries can be found at
1744 their respective hosting sites as well as at
1745 https://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1746 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1747 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1748 make sure that you have installed both the libraries and the header
1749 files.  They may be located in separate packages.])
1750   fi
1751 fi
1752
1753 # Flags needed for both GMP, MPFR and/or MPC.
1754 AC_SUBST(gmplibs)
1755 AC_SUBST(gmpinc)
1756 AC_SUBST(extra_mpfr_configure_flags)
1757 AC_SUBST(extra_mpc_gmp_configure_flags)
1758 AC_SUBST(extra_mpc_mpfr_configure_flags)
1759 AC_SUBST(extra_isl_gmp_configure_flags)
1760
1761 # Libraries to use for stage1 or when not bootstrapping.
1762 AC_ARG_WITH(stage1-libs,
1763 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1764 [if test "$withval" = "no" -o "$withval" = "yes"; then
1765    stage1_libs=
1766  else
1767    stage1_libs=$withval
1768  fi],
1769 [stage1_libs=])
1770 AC_SUBST(stage1_libs)
1771
1772 # Whether or not to use -static-libstdc++ and -static-libgcc.  The
1773 # default is yes if gcc is being built; no otherwise.  The reason for
1774 # this default is that gdb is sometimes linked against GNU Source
1775 # Highlight, which is a shared library that uses C++ exceptions.  In
1776 # this case, -static-libstdc++ will cause crashes.
1777 AC_ARG_WITH(static-standard-libraries,
1778 [AS_HELP_STRING([--with-static-standard-libraries],
1779                 [use -static-libstdc++ and -static-libgcc (default=auto)])],
1780 [], [with_static_standard_libraries=auto])
1781 if test "$with_static_standard_libraries" = auto; then
1782   with_static_standard_libraries=$have_compiler
1783 fi
1784
1785 # Linker flags to use for stage1 or when not bootstrapping.
1786 AC_ARG_WITH(stage1-ldflags,
1787 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1788 [if test "$withval" = "no" -o "$withval" = "yes"; then
1789    stage1_ldflags=
1790  else
1791    stage1_ldflags=$withval
1792  fi],
1793 [stage1_ldflags=
1794  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1795  # if supported.  But if the user explicitly specified the libraries to use,
1796  # trust that they are doing what they want.
1797  if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
1798      -a "$have_static_libs" = yes; then
1799    stage1_ldflags="-static-libstdc++ -static-libgcc"
1800  fi])
1801 AC_SUBST(stage1_ldflags)
1802
1803 # Libraries to use for stage2 and later builds.
1804 AC_ARG_WITH(boot-libs,
1805 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1806 [if test "$withval" = "no" -o "$withval" = "yes"; then
1807    poststage1_libs=
1808  else
1809    poststage1_libs=$withval
1810  fi],
1811 [poststage1_libs=])
1812 AC_SUBST(poststage1_libs)
1813
1814 # Linker flags to use for stage2 and later builds.
1815 AC_ARG_WITH(boot-ldflags,
1816 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1817                 [linker flags for stage2 and later])],
1818 [if test "$withval" = "no" -o "$withval" = "yes"; then
1819    poststage1_ldflags=
1820  else
1821    poststage1_ldflags=$withval
1822  fi],
1823 [poststage1_ldflags=
1824  # In stages 2 and 3, default to linking libstdc++ and libgcc
1825  # statically.  But if the user explicitly specified the libraries to
1826  # use, trust that they are doing what they want.
1827  if test "$poststage1_libs" = ""; then
1828    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1829  fi])
1830 AC_SUBST(poststage1_ldflags)
1831
1832 # GCC GRAPHITE dependency isl.
1833 # Basic setup is inlined here, actual checks are in config/isl.m4
1834
1835 AC_ARG_WITH(isl,
1836   [AS_HELP_STRING(
1837    [--with-isl=PATH],
1838    [Specify prefix directory for the installed isl package.
1839     Equivalent to --with-isl-include=PATH/include
1840     plus --with-isl-lib=PATH/lib])])
1841
1842 # Treat --without-isl as a request to disable
1843 # GRAPHITE support and skip all following checks.
1844 if test "x$with_isl" != "xno"; then
1845   # Check for isl
1846   dnl Provide configure switches and initialize islinc & isllibs
1847   dnl with user input.
1848   ISL_INIT_FLAGS
1849   dnl The versions of isl that work for Graphite
1850   ISL_CHECK_VERSION()
1851   dnl Only execute fail-action, if isl has been requested.
1852   ISL_IF_FAILED([
1853     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1854 fi
1855
1856 # If the isl check failed, disable builds of in-tree variant of isl
1857 if test "x$with_isl" = xno ||
1858    test "x$gcc_cv_isl" = xno; then
1859   noconfigdirs="$noconfigdirs isl"
1860   islinc=
1861 fi
1862
1863 AC_SUBST(isllibs)
1864 AC_SUBST(islinc)
1865
1866 # Check for LTO support.
1867 AC_ARG_ENABLE(lto,
1868 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1869 enable_lto=$enableval,
1870 enable_lto=yes; default_enable_lto=yes)
1871
1872 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1873   build_lto_plugin=yes
1874 ],[if test x"$default_enable_lto" = x"yes" ; then
1875     case $target in
1876       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1877       # On other non-ELF platforms, LTO has yet to be validated.
1878       *) enable_lto=no ;;
1879     esac
1880   else
1881   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1882   # It would also be nice to check the binutils support, but we don't
1883   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1884   # warn during gcc/ subconfigure; unless you're bootstrapping with
1885   # -flto it won't be needed until after installation anyway.
1886     case $target in
1887       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1888       *) if test x"$enable_lto" = x"yes"; then
1889         AC_MSG_ERROR([LTO support is not enabled for this target.])
1890         fi
1891       ;;
1892     esac
1893   fi
1894   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1895   # Build it unless LTO was explicitly disabled.
1896   case $target in
1897     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1898     *) ;;
1899   esac
1900 ])
1901
1902 AC_ARG_ENABLE(linker-plugin-configure-flags,
1903   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1904     [additional flags for configuring linker plugins @<:@none@:>@])],
1905   extra_linker_plugin_configure_flags=$enableval,
1906   extra_linker_plugin_configure_flags=)
1907 AC_SUBST(extra_linker_plugin_configure_flags)
1908 AC_ARG_ENABLE(linker-plugin-flags,
1909   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1910     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1911   extra_linker_plugin_flags=$enableval,
1912   extra_linker_plugin_flags=)
1913 AC_SUBST(extra_linker_plugin_flags)
1914
1915 # Enable --enable-host-shared.
1916 # Checked early to determine whether jit is an 'all' language
1917 AC_ARG_ENABLE(host-shared,
1918 [AS_HELP_STRING([--enable-host-shared],
1919                 [build host code as shared libraries])],
1920 [host_shared=$enableval
1921  case $target in
1922    x86_64-*-darwin* | aarch64-*-darwin*)
1923      if test x$host_shared != xyes ; then
1924        # PIC is the default, and actually cannot be switched off.
1925        echo configure.ac: warning: PIC code is required for the configured target, host-shared setting ignored. 1>&2
1926        host_shared=yes
1927      fi ;;
1928   *) ;;
1929  esac],
1930 [case $target in
1931   x86_64-*-darwin* | aarch64-*-darwin*) host_shared=yes ;;
1932   *) host_shared=no ;;
1933  esac])
1934 AC_SUBST(host_shared)
1935
1936 # By default, C and C++ are the only stage 1 languages.
1937 stage1_languages=,c,
1938
1939 # Target libraries that we bootstrap.
1940 bootstrap_target_libs=,target-libgcc,
1941
1942 # Figure out what language subdirectories are present.
1943 # Look if the user specified --enable-languages="..."; if not, use
1944 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1945 # go away some day.
1946 # NB:  embedded tabs in this IF block -- do not untabify
1947 if test -d ${srcdir}/gcc; then
1948   if test x"${enable_languages+set}" != xset; then
1949     if test x"${LANGUAGES+set}" = xset; then
1950       enable_languages="${LANGUAGES}"
1951         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1952     else
1953       enable_languages=default
1954     fi
1955   else
1956     if test x"${enable_languages}" = x ||
1957        test x"${enable_languages}" = xyes;
1958        then
1959       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1960       exit 1
1961     fi
1962   fi
1963   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1964
1965   # 'f95' is the old name for the 'fortran' language. We issue a warning
1966   # and make the substitution.
1967   case ,${enable_languages}, in
1968     *,f95,*)
1969       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1970       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1971       ;;
1972   esac
1973
1974   # If bootstrapping, C++ must be enabled.
1975   case ",$enable_languages,:$enable_bootstrap" in
1976     *,c++,*:*) ;;
1977     *:yes)
1978       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1979         enable_languages="${enable_languages},c++"
1980       else
1981         AC_MSG_ERROR([bootstrapping requires c++ sources])
1982       fi
1983       ;;
1984   esac
1985
1986   # First scan to see if an enabled language requires some other language.
1987   # We assume that a given config-lang.in will list all the language
1988   # front ends it requires, even if some are required indirectly.
1989   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1990     case ${lang_frag} in
1991       ..) ;;
1992       # The odd quoting in the next line works around
1993       # an apparent bug in bash 1.12 on linux.
1994       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1995       *)
1996         # From the config-lang.in, get $language, $lang_requires, and
1997         # $lang_requires_boot_languages.
1998         language=
1999         lang_requires=
2000         lang_requires_boot_languages=
2001         # set srcdir during sourcing lang_frag to the gcc dir.
2002         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
2003         # polutes this shell
2004         saved_srcdir=${srcdir}
2005         srcdir=${srcdir}/gcc . ${lang_frag}
2006         srcdir=${saved_srcdir}
2007         for other in ${lang_requires} ${lang_requires_boot_languages}; do
2008           case ,${enable_languages}, in
2009             *,$other,*) ;;
2010             *,default,*) ;;
2011             *,all,*) ;;
2012             *,$language,*)
2013               echo " \`$other' language required by \`$language'; enabling" 1>&2
2014               enable_languages="${enable_languages},${other}"
2015               ;;
2016           esac
2017         done
2018         for other in ${lang_requires_boot_languages} ; do
2019           if test "$other" != "c"; then
2020             case ,${enable_stage1_languages}, in
2021               *,$other,*) ;;
2022               *,default,*) ;;
2023               *,all,*) ;;
2024               *)
2025                 case ,${enable_languages}, in
2026                   *,$language,*)
2027                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
2028                     enable_stage1_languages="$enable_stage1_languages,${other}"
2029                     ;;
2030                 esac
2031                 ;;
2032             esac
2033           fi
2034         done
2035         ;;
2036     esac
2037   done
2038
2039   new_enable_languages=,c,
2040
2041   # If LTO is enabled, add the LTO front end.
2042   if test "$enable_lto" = "yes" ; then
2043     case ,${enable_languages}, in
2044       *,lto,*) ;;
2045       *) enable_languages="${enable_languages},lto" ;;
2046     esac
2047     if test "${build_lto_plugin}" = "yes" ; then
2048       configdirs="$configdirs lto-plugin"
2049     fi
2050   fi
2051
2052   # If we're building an offloading compiler, add the LTO front end.
2053   if test x"$enable_as_accelerator_for" != x ; then
2054     case ,${enable_languages}, in
2055       *,lto,*) ;;
2056       *) enable_languages="${enable_languages},lto" ;;
2057     esac
2058   fi
2059
2060   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
2061   potential_languages=,c,
2062
2063   enabled_target_libs=
2064   disabled_target_libs=
2065
2066   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2067     case ${lang_frag} in
2068       ..) ;;
2069       # The odd quoting in the next line works around
2070       # an apparent bug in bash 1.12 on linux.
2071       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2072       *)
2073         # From the config-lang.in, get $language, $target_libs,
2074         # $lang_dirs, $boot_language, and $build_by_default
2075         language=
2076         target_libs=
2077         lang_dirs=
2078         subdir_requires=
2079         boot_language=no
2080         build_by_default=yes
2081         # set srcdir during sourcing.  See above about save & restore
2082         saved_srcdir=${srcdir}
2083         srcdir=${srcdir}/gcc . ${lang_frag}
2084         srcdir=${saved_srcdir}
2085         if test x${language} = x; then
2086           echo "${lang_frag} doesn't set \$language." 1>&2
2087           exit 1
2088         fi
2089
2090         if test "$language" = "c++"; then
2091           boot_language=yes
2092         fi
2093
2094         add_this_lang=no
2095         # C is always enabled, so no need to add it again
2096         if test "$language" != "c"; then
2097           case ,${enable_languages}, in
2098             *,${language},*)
2099               # Language was explicitly selected; include it
2100               add_this_lang=yes
2101               ;;
2102             *,all,*)
2103               # All languages are enabled
2104               add_this_lang=all
2105               ;;
2106             *,default,*)
2107               # 'default' was selected, select it if it is a default language
2108               add_this_lang=${build_by_default}
2109               ;;
2110           esac
2111         fi
2112
2113         # Disable languages that need other directories if these aren't available.
2114         for i in $subdir_requires; do
2115           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2116           case ${add_this_lang} in
2117             yes)
2118               # Specifically requested language; tell them.
2119               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2120               ;;
2121             all)
2122               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2123               add_this_lang=unsupported
2124               ;;
2125             *)
2126               # Silently disable.
2127               add_this_lang=unsupported
2128               ;;
2129           esac
2130         done
2131
2132         # Disable Ada if no preexisting GNAT is available.
2133         case ${add_this_lang}:${language}:${have_gnat} in
2134           yes:ada:no)
2135             # Specifically requested language; tell them.
2136             AC_MSG_ERROR([GNAT is required to build $language])
2137             ;;
2138           all:ada:no)
2139             AC_MSG_WARN([GNAT is required to build $language])
2140             add_this_lang=unsupported
2141             ;;
2142           *:ada:no)
2143             # Silently disable.
2144             add_this_lang=unsupported
2145             ;;
2146         esac
2147
2148         # Disable D if no preexisting GDC is available.
2149         case ${add_this_lang}:${language}:${have_gdc} in
2150           yes:d:no)
2151             # Specifically requested language; tell them.
2152             AC_MSG_ERROR([GDC is required to build $language])
2153            ;;
2154           all:d:no)
2155             AC_MSG_WARN([GDC is required to build $language])
2156             add_this_lang=unsupported
2157             ;;
2158           *:d:no)
2159             # Silently disable.
2160             add_this_lang=unsupported
2161             ;;
2162         esac
2163
2164         # Disable jit if -enable-host-shared not specified
2165         # but not if building for Mingw. All code in Windows
2166         # is position independent code (PIC).
2167         case $target in
2168           *mingw*) ;;
2169           *)
2170           case ${add_this_lang}:${language}:${host_shared} in
2171             yes:jit:no)
2172                    # PR jit/64780: explicitly specify --enable-host-shared
2173             AC_MSG_ERROR([
2174 Enabling language "jit" requires --enable-host-shared.
2175
2176 --enable-host-shared typically slows the rest of the compiler down by
2177 a few %, so you must explicitly enable it.
2178
2179 If you want to build both the jit and the regular compiler, it is often
2180 best to do this via two separate configure/builds, in separate
2181 directories, to avoid imposing the performance cost of
2182 --enable-host-shared on the regular compiler.])
2183                     ;;
2184             all:jit:no)
2185               AC_MSG_WARN([--enable-host-shared required to build $language])
2186               add_this_lang=unsupported
2187               ;;
2188             *:jit:no)
2189               # Silently disable.
2190               add_this_lang=unsupported
2191               ;;
2192                 esac
2193           ;;
2194         esac
2195
2196         # Disable a language that is unsupported by the target.
2197         case "${add_this_lang}: $unsupported_languages " in
2198           no:*) ;;
2199           unsupported:*) ;;
2200           *:*" $language "*)
2201             AC_MSG_WARN([${language} not supported for this target])
2202             add_this_lang=unsupported
2203             ;;
2204         esac
2205
2206         case $add_this_lang in
2207           unsupported)
2208             # Remove language-dependent dirs.
2209             disabled_target_libs="$disabled_target_libs $target_libs"
2210             noconfigdirs="$noconfigdirs $lang_dirs"
2211             ;;
2212           no)
2213             # Remove language-dependent dirs; still show language as supported.
2214             disabled_target_libs="$disabled_target_libs $target_libs"
2215             noconfigdirs="$noconfigdirs $lang_dirs"
2216             potential_languages="${potential_languages}${language},"
2217             ;;
2218           all|yes)
2219             new_enable_languages="${new_enable_languages}${language},"
2220             potential_languages="${potential_languages}${language},"
2221             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2222             enabled_target_libs="$enabled_target_libs $target_libs"
2223             case "${boot_language}:,$enable_stage1_languages," in
2224               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2225                 # Add to (comma-separated) list of stage 1 languages.
2226                 case ",$stage1_languages," in
2227                   *,$language,* | ,yes, | ,all,) ;;
2228                   *) stage1_languages="${stage1_languages}${language}," ;;
2229                 esac
2230                 # We need to bootstrap any supporting libraries.
2231                 bootstrap_target_libs=`echo "${bootstrap_target_libs}${target_libs}," | sed "s/ /,/g"`
2232                 ;;
2233             esac
2234             ;;
2235         esac
2236         ;;
2237     esac
2238   done
2239
2240   # Add target libraries which are only needed for disabled languages
2241   # to noconfigdirs.
2242   if test -n "$disabled_target_libs"; then
2243     for dir in $disabled_target_libs; do
2244       case " $enabled_target_libs " in
2245       *" ${dir} "*) ;;
2246       *) noconfigdirs="$noconfigdirs $dir" ;;
2247       esac
2248     done
2249   fi
2250
2251   AC_ARG_ENABLE(stage1-languages,
2252   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2253                   [choose additional languages to build during
2254                   stage1.  Mostly useful for compiler development])],
2255   [case ,${enable_stage1_languages}, in
2256     ,no,|,,)
2257       # Set it to something that will have no effect in the loop below
2258       enable_stage1_languages=c ;;
2259     ,yes,)
2260       enable_stage1_languages=`echo $new_enable_languages | \
2261         sed -e "s/^,//" -e "s/,$//" ` ;;
2262     *,all,*)
2263       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2264         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2265   esac
2266
2267   # Add "good" languages from enable_stage1_languages to stage1_languages,
2268   # while "bad" languages go in missing_languages.  Leave no duplicates.
2269   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2270     case $potential_languages in
2271       *,$i,*)
2272         case $stage1_languages in
2273           *,$i,*) ;;
2274           *) stage1_languages="$stage1_languages$i," ;;
2275         esac ;;
2276       *)
2277         case $missing_languages in
2278           *,$i,*) ;;
2279           *) missing_languages="$missing_languages$i," ;;
2280         esac ;;
2281      esac
2282   done])
2283
2284   # Remove leading/trailing commas that were added for simplicity
2285   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2286   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2287   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2288   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2289
2290   if test "x$missing_languages" != x; then
2291     AC_MSG_ERROR([
2292 The following requested languages could not be built: ${missing_languages}
2293 Supported languages are: ${potential_languages}])
2294   fi
2295   if test "x$new_enable_languages" != "x$enable_languages"; then
2296     echo The following languages will be built: ${new_enable_languages}
2297     enable_languages="$new_enable_languages"
2298   fi
2299
2300   AC_SUBST(stage1_languages)
2301   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2302 fi
2303
2304 # Handle --disable-<component> generically.
2305 for dir in $configdirs $build_configdirs $target_configdirs ; do
2306   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2307   varname=`echo $dirname | sed -e s/+/_/g`
2308   if eval test x\${enable_${varname}} "=" xno ; then
2309     noconfigdirs="$noconfigdirs $dir"
2310   fi
2311 done
2312
2313 # Check for Boehm's garbage collector
2314 AC_ARG_ENABLE(objc-gc,
2315 [AS_HELP_STRING([--enable-objc-gc],
2316                 [enable use of Boehm's garbage collector with the
2317                  GNU Objective-C runtime])])
2318 AC_ARG_WITH([target-bdw-gc],
2319 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2320                 [specify prefix directory for installed bdw-gc package.
2321                  Equivalent to --with-target-bdw-gc-include=PATH/include
2322                  plus --with-target-bdw-gc-lib=PATH/lib])])
2323 AC_ARG_WITH([target-bdw-gc-include],
2324 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2325                 [specify directories for installed bdw-gc include files])])
2326 AC_ARG_WITH([target-bdw-gc-lib],
2327 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2328                 [specify directories for installed bdw-gc library])])
2329
2330 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2331   AC_MSG_CHECKING([for bdw garbage collector])
2332   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2333     dnl no bdw-gw options, assume default locations
2334     AC_MSG_RESULT([using bdw-gc in default locations])
2335   else
2336     dnl bdw-gw options, first error checking, complete checking in libobjc
2337     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2338       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2339     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2340       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2341     else
2342       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2343     fi
2344   fi
2345 esac
2346
2347 # Disable libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2348 case ,${enable_languages}, in
2349   *,c++,*)
2350     # Disable libitm, libsanitizer if we're not building libstdc++
2351     case "${noconfigdirs}" in
2352       *target-libstdc++-v3*)
2353         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2354         ;;
2355       *) ;;
2356     esac
2357     ;;
2358   *)
2359     noconfigdirs="$noconfigdirs target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2360     ;;
2361 esac
2362
2363 # If gcc/ is not in the source tree then we'll not be building a
2364 # target compiler, assume in that case we don't want to build any
2365 # target libraries or tools.
2366 #
2367 # This was added primarily for the benefit for binutils-gdb who reuse
2368 # this configure script, but don't always have target tools available.
2369 if test ! -d ${srcdir}/gcc; then
2370    skipdirs="${skipdirs} ${target_configdirs}"
2371 fi
2372
2373 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2374 # $build_configdirs and $target_configdirs.
2375 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2376
2377 notsupp=""
2378 for dir in . $skipdirs $noconfigdirs ; do
2379   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2380   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2381     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2382     if test -r $srcdir/$dirname/configure ; then
2383       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2384         true
2385       else
2386         notsupp="$notsupp $dir"
2387       fi
2388     fi
2389   fi
2390   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2391     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2392     if test -r $srcdir/$dirname/configure ; then
2393       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2394         true
2395       else
2396         notsupp="$notsupp $dir"
2397       fi
2398     fi
2399   fi
2400   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2401     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2402     if test -r $srcdir/$dirname/configure ; then
2403       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2404         true
2405       else
2406         notsupp="$notsupp $dir"
2407       fi
2408     fi
2409   fi
2410 done
2411
2412 # Quietly strip out all directories which aren't configurable in this tree.
2413 # This relies on all configurable subdirectories being autoconfiscated, which
2414 # is now the case.
2415 build_configdirs_all="$build_configdirs"
2416 build_configdirs=
2417 for i in ${build_configdirs_all} ; do
2418   j=`echo $i | sed -e s/build-//g`
2419   if test -f ${srcdir}/$j/configure ; then
2420     build_configdirs="${build_configdirs} $i"
2421   fi
2422 done
2423
2424 configdirs_all="$configdirs"
2425 configdirs=
2426 for i in ${configdirs_all} ; do
2427   if test -f ${srcdir}/$i/configure ; then
2428     configdirs="${configdirs} $i"
2429   fi
2430 done
2431
2432 target_configdirs_all="$target_configdirs"
2433 target_configdirs=
2434 for i in ${target_configdirs_all} ; do
2435   j=`echo $i | sed -e s/target-//g`
2436   if test -f ${srcdir}/$j/configure ; then
2437     target_configdirs="${target_configdirs} $i"
2438   fi
2439 done
2440
2441 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2442 # so we have to add it after the preceding checks.
2443 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2444 then
2445   case " $configdirs " in
2446     *" libiberty "*)
2447       # If we can build libiberty, we can also build libiberty-linker-plugin.
2448       configdirs="$configdirs libiberty-linker-plugin"
2449       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2450         --with-libiberty=../libiberty-linker-plugin";;
2451     *)
2452       AC_MSG_ERROR([libiberty missing]);;
2453   esac
2454 fi
2455
2456 # Sometimes we have special requirements for the host libiberty.
2457 extra_host_libiberty_configure_flags=
2458 extra_host_zlib_configure_flags=
2459 case " $configdirs " in
2460   *" lto-plugin "* | *" libcc1 "*)
2461     # When these are to be built as shared libraries, the same applies to
2462     # libiberty.
2463     extra_host_libiberty_configure_flags=--enable-shared
2464     ;;
2465   *" bfd "*)
2466     # When bfd is to be built as a shared library, the same applies to
2467     # zlib.
2468     if test "$enable_shared" = "yes"; then
2469       extra_host_zlib_configure_flags=--enable-host-shared
2470     fi
2471     ;;
2472 esac
2473 AC_SUBST(extra_host_libiberty_configure_flags)
2474 AC_SUBST(extra_host_zlib_configure_flags)
2475
2476 # Produce a warning message for the subdirs we can't configure.
2477 # This isn't especially interesting in the Cygnus tree, but in the individual
2478 # FSF releases, it's important to let people know when their machine isn't
2479 # supported by the one or two programs in a package.
2480
2481 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2482   # If $appdirs is non-empty, at least one of those directories must still
2483   # be configured, or we error out.  (E.g., if the gas release supports a
2484   # specified target in some subdirs but not the gas subdir, we shouldn't
2485   # pretend that all is well.)
2486   if test -n "$appdirs" ; then
2487     for dir in $appdirs ; do
2488       if test -r $dir/Makefile.in ; then
2489         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2490           appdirs=""
2491           break
2492         fi
2493         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2494           appdirs=""
2495           break
2496         fi
2497       fi
2498     done
2499     if test -n "$appdirs" ; then
2500       echo "*** This configuration is not supported by this package." 1>&2
2501       exit 1
2502     fi
2503   fi
2504   # Okay, some application will build, or we don't care to check.  Still
2505   # notify of subdirs not getting built.
2506   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2507   echo "    ${notsupp}" 1>&2
2508   echo "    (Any other directories should still work fine.)" 1>&2
2509 fi
2510
2511 case "$host" in
2512   *msdosdjgpp*)
2513     enable_gdbtk=no ;;
2514 esac
2515
2516 # To find our prefix, in gcc_cv_tool_prefix.
2517 ACX_TOOL_DIRS
2518
2519 copy_dirs=
2520
2521 AC_ARG_WITH([build-sysroot],
2522   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2523                   [use sysroot as the system root during the build])],
2524   [if test x"$withval" != x ; then
2525      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2526    fi],
2527   [SYSROOT_CFLAGS_FOR_TARGET=])
2528 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2529
2530 AC_ARG_WITH([debug-prefix-map],
2531   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2532                   [map A to B, C to D ... in debug information])],
2533   [if test x"$withval" != x; then
2534      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2535      for debug_map in $withval; do
2536        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2537      done
2538    fi],
2539   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2540 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2541
2542 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2543 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2544 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2545 # We want to ensure that TARGET libraries (which we know are built with
2546 # gcc) are built with "-O2 -g", so include those options when setting
2547 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2548 if test "x$CFLAGS_FOR_TARGET" = x; then
2549   if test "x${is_cross_compiler}" = xyes; then
2550     CFLAGS_FOR_TARGET="-g -O2"
2551   else
2552     CFLAGS_FOR_TARGET=$CFLAGS
2553     case " $CFLAGS " in
2554       *" -O2 "*) ;;
2555       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2556     esac
2557     case " $CFLAGS " in
2558       *" -g "* | *" -g3 "*) ;;
2559       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2560     esac
2561   fi
2562 fi
2563 AC_SUBST(CFLAGS_FOR_TARGET)
2564
2565 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2566   if test "x${is_cross_compiler}" = xyes; then
2567     CXXFLAGS_FOR_TARGET="-g -O2"
2568   else
2569     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2570     case " $CXXFLAGS " in
2571       *" -O2 "*) ;;
2572       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2573     esac
2574     case " $CXXFLAGS " in
2575       *" -g "* | *" -g3 "*) ;;
2576       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2577     esac
2578   fi
2579 fi
2580 AC_SUBST(CXXFLAGS_FOR_TARGET)
2581
2582 AC_SUBST(LDFLAGS_FOR_TARGET)
2583
2584 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2585 # the named directory are copied to $(tooldir)/sys-include.
2586 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2587   if test x${is_cross_compiler} = xno ; then
2588     echo 1>&2 '***' --with-headers is only supported when cross compiling
2589     exit 1
2590   fi
2591   if test x"${with_headers}" != xyes ; then
2592     x=${gcc_cv_tool_prefix}
2593     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2594   fi
2595 fi
2596
2597 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2598 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2599 # are permitted.
2600 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2601   if test x${is_cross_compiler} = xno ; then
2602     echo 1>&2 '***' --with-libs is only supported when cross compiling
2603     exit 1
2604   fi
2605   if test x"${with_libs}" != xyes ; then
2606     # Copy the libraries in reverse order, so that files in the first named
2607     # library override files in subsequent libraries.
2608     x=${gcc_cv_tool_prefix}
2609     for l in ${with_libs}; do
2610       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2611     done
2612   fi
2613 fi
2614
2615 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2616 #
2617 # This is done by determining whether or not the appropriate directory
2618 # is available, and by checking whether or not specific configurations
2619 # have requested that this magic not happen.
2620 #
2621 # The command line options always override the explicit settings in
2622 # configure.ac, and the settings in configure.ac override this magic.
2623 #
2624 # If the default for a toolchain is to use GNU as and ld, and you don't
2625 # want to do that, then you should use the --without-gnu-as and
2626 # --without-gnu-ld options for the configure script.  Similarly, if
2627 # the default is to use the included zlib and you don't want to do that,
2628 # you should use the --with-system-zlib option for the configure script.
2629
2630 if test x${use_gnu_as} = x &&
2631    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2632   with_gnu_as=yes
2633   extra_host_args="$extra_host_args --with-gnu-as"
2634 fi
2635
2636 if test x${use_gnu_ld} = x &&
2637    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2638   with_gnu_ld=yes
2639   extra_host_args="$extra_host_args --with-gnu-ld"
2640 fi
2641
2642 if test x${use_included_zlib} = x &&
2643    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2644   :
2645 else
2646   with_system_zlib=yes
2647   extra_host_args="$extra_host_args --with-system-zlib"
2648 fi
2649
2650 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2651 # can detect this case.
2652
2653 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2654   with_newlib=yes
2655   extra_host_args="$extra_host_args --with-newlib"
2656 fi
2657
2658 # Handle ${copy_dirs}
2659 set fnord ${copy_dirs}
2660 shift
2661 while test $# != 0 ; do
2662   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2663     :
2664   else
2665     echo Copying $1 to $2
2666
2667     # Use the install script to create the directory and all required
2668     # parent directories.
2669     if test -d $2 ; then
2670       :
2671     else
2672       echo >config.temp
2673       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2674     fi
2675
2676     # Copy the directory, assuming we have tar.
2677     # FIXME: Should we use B in the second tar?  Not all systems support it.
2678     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2679
2680     # It is the responsibility of the user to correctly adjust all
2681     # symlinks.  If somebody can figure out how to handle them correctly
2682     # here, feel free to add the code.
2683
2684     echo $1 > $2/COPIED
2685   fi
2686   shift; shift
2687 done
2688
2689 # Determine a target-dependent exec_prefix that the installed
2690 # gcc will search in.  Keep this list sorted by triplet, with
2691 # the *-*-osname triplets last.
2692 md_exec_prefix=
2693 case "${target}" in
2694   i[[34567]]86-pc-msdosdjgpp*)
2695     md_exec_prefix=/dev/env/DJDIR/bin
2696     ;;
2697   *-*-hpux* | \
2698   *-*-nto-qnx* | \
2699   *-*-solaris2*)
2700     md_exec_prefix=/usr/ccs/bin
2701     ;;
2702 esac
2703
2704 extra_arflags_for_target=
2705 extra_nmflags_for_target=
2706 extra_ranlibflags_for_target=
2707 target_makefile_frag=/dev/null
2708 case "${target}" in
2709   spu-*-*)
2710     target_makefile_frag="config/mt-spu"
2711     ;;
2712   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2713     target_makefile_frag="config/mt-sde"
2714     ;;
2715   mipsisa*-*-elfoabi*)
2716     target_makefile_frag="config/mt-mips-elfoabi"
2717     ;;
2718   mips*-*-*linux* | mips*-*-gnu*)
2719     target_makefile_frag="config/mt-mips-gnu"
2720     ;;
2721   nios2-*-elf*)
2722     target_makefile_frag="config/mt-nios2-elf"
2723     ;;
2724   *-*-linux-android*)
2725     target_makefile_frag="config/mt-android"
2726     ;;
2727   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2728     target_makefile_frag="config/mt-gnu"
2729     ;;
2730   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2731     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2732     # commands to handle both 32-bit and 64-bit objects.  These flags are
2733     # harmless if we're using GNU nm or ar.
2734     extra_arflags_for_target=" -X32_64"
2735     extra_nmflags_for_target=" -B -X32_64"
2736     ;;
2737 esac
2738
2739 alphaieee_frag=/dev/null
2740 case $target in
2741   alpha*-*-*)
2742     # This just makes sure to use the -mieee option to build target libs.
2743     # This should probably be set individually by each library.
2744     alphaieee_frag="config/mt-alphaieee"
2745     ;;
2746 esac
2747
2748 # If --enable-target-optspace always use -Os instead of -O2 to build
2749 # the target libraries, similarly if it is not specified, use -Os
2750 # on selected platforms.
2751 ospace_frag=/dev/null
2752 case "${enable_target_optspace}:${target}" in
2753   yes:*)
2754     ospace_frag="config/mt-ospace"
2755     ;;
2756   :d30v-*)
2757     ospace_frag="config/mt-d30v"
2758     ;;
2759   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2760     ospace_frag="config/mt-ospace"
2761     ;;
2762   no:* | :*)
2763     ;;
2764   *)
2765     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2766     ;;
2767 esac
2768
2769 # Some systems (e.g., one of the i386-aix systems the gas testers are
2770 # using) don't handle "\$" correctly, so don't use it here.
2771 tooldir='${exec_prefix}'/${target_noncanonical}
2772 build_tooldir=${tooldir}
2773
2774 # Create a .gdbinit file which runs the one in srcdir
2775 # and tells GDB to look there for source files.
2776
2777 if test -r ${srcdir}/.gdbinit ; then
2778   case ${srcdir} in
2779     .) ;;
2780     *) cat > ./.gdbinit <<EOF
2781 # ${NO_EDIT}
2782 dir ${srcdir}
2783 dir .
2784 source ${srcdir}/.gdbinit
2785 EOF
2786     ;;
2787   esac
2788 fi
2789
2790 # Make sure that the compiler is able to generate an executable.  If it
2791 # can't, we are probably in trouble.  We don't care whether we can run the
2792 # executable--we might be using a cross compiler--we only care whether it
2793 # can be created.  At this point the main configure script has set CC.
2794 we_are_ok=no
2795 echo "int main () { return 0; }" > conftest.c
2796 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2797 if test $? = 0 ; then
2798   if test -s conftest || test -s conftest.exe ; then
2799     we_are_ok=yes
2800   fi
2801 fi
2802 case $we_are_ok in
2803   no)
2804     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2805     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2806     rm -f conftest*
2807     exit 1
2808     ;;
2809 esac
2810 rm -f conftest*
2811
2812 # Decide which environment variable is used to find dynamic libraries.
2813 case "${host}" in
2814   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2815   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2816   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2817   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2818 esac
2819
2820 # On systems where the dynamic library environment variable is PATH,
2821 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2822 # built executables to PATH.
2823 if test "$RPATH_ENVVAR" = PATH; then
2824   GCC_SHLIB_SUBDIR=/shlib
2825 else
2826   GCC_SHLIB_SUBDIR=
2827 fi
2828
2829 # Adjust the toplevel makefile according to whether bootstrap was selected.
2830 case $enable_bootstrap in
2831   yes)
2832     bootstrap_suffix=bootstrap
2833     BUILD_CONFIG=bootstrap-debug
2834     ;;
2835   no)
2836     bootstrap_suffix=no-bootstrap
2837     BUILD_CONFIG=
2838     ;;
2839 esac
2840
2841 AC_MSG_CHECKING(for default BUILD_CONFIG)
2842
2843 AC_ARG_WITH([build-config],
2844   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2845                   [use config/NAME.mk build configuration])],
2846   [case $with_build_config in
2847    yes) with_build_config= ;;
2848    no) with_build_config= BUILD_CONFIG= ;;
2849    esac])
2850
2851 if test "x${with_build_config}" != x; then
2852   BUILD_CONFIG=$with_build_config
2853 else
2854   case $BUILD_CONFIG in
2855   bootstrap-debug)
2856     if echo "int f (void) { return 0; }" > conftest.c &&
2857        ${CC} -c conftest.c &&
2858        mv conftest.o conftest.o.g0 &&
2859        ${CC} -c -g conftest.c &&
2860        mv conftest.o conftest.o.g &&
2861        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2862       :
2863     else
2864       BUILD_CONFIG=
2865     fi
2866     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2867     ;;
2868   esac
2869 fi
2870 AC_MSG_RESULT($BUILD_CONFIG)
2871 AC_SUBST(BUILD_CONFIG)
2872
2873 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2874 AC_MSG_CHECKING([for --enable-vtable-verify])
2875 AC_ARG_ENABLE(vtable-verify,
2876 [AS_HELP_STRING([--enable-vtable-verify],
2877                 [Enable vtable verification feature])],
2878 [case "$enableval" in
2879  yes) enable_vtable_verify=yes ;;
2880  no)  enable_vtable_verify=no ;;
2881  *)   enable_vtable_verify=no;;
2882  esac],
2883 [enable_vtable_verify=no])
2884 AC_MSG_RESULT($enable_vtable_verify)
2885
2886 # Record target_configdirs and the configure arguments for target and
2887 # build configuration in Makefile.
2888 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2889 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2890 bootstrap_fixincludes=no
2891
2892 # If we are building libgomp, bootstrap it.
2893 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2894   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2895 fi
2896
2897 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2898 # or bootstrap-ubsan, bootstrap it.
2899 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2900   case "$BUILD_CONFIG" in
2901     *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
2902       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2903       bootstrap_fixincludes=yes
2904       ;;
2905   esac
2906 fi
2907
2908 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2909 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2910    test "$enable_vtable_verify" != no; then
2911   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2912 fi
2913
2914 # If we are building libatomic and the list of enabled languages includes the
2915 # D frontend, bootstrap it.
2916 if echo " ${target_configdirs} " | grep " libatomic " > /dev/null 2>&1; then
2917   case ,${enable_languages}, in
2918     *,d,*)
2919       bootstrap_target_libs=${bootstrap_target_libs}target-libatomic,
2920       ;;
2921   esac
2922 fi
2923
2924 # Determine whether gdb needs tk/tcl or not.
2925 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2926 # and in that case we want gdb to be built without tk.  Ugh!
2927 # In fact I believe gdb is the *only* package directly dependent on tk,
2928 # so we should be able to put the 'maybe's in unconditionally and
2929 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2930 # 100% sure that that's safe though.
2931
2932 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2933 case "$enable_gdbtk" in
2934   no)
2935     GDB_TK="" ;;
2936   yes)
2937     GDB_TK="${gdb_tk}" ;;
2938   *)
2939     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2940     # distro.  Eventually someone will fix this and move Insight, nee
2941     # gdbtk to a separate directory.
2942     if test -d ${srcdir}/gdb/gdbtk ; then
2943       GDB_TK="${gdb_tk}"
2944     else
2945       GDB_TK=""
2946     fi
2947     ;;
2948 esac
2949 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2950 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2951
2952 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
2953 # else does, only include them if one of these is built.  The Makefile
2954 # provides the ordering, so it's enough here to add to the list.
2955 case " ${configdirs} " in
2956   *\ gdb\ *)
2957     configdirs="${configdirs} gnulib gdbsupport"
2958     ;;
2959   *\ gdbserver\ *)
2960     configdirs="${configdirs} gnulib gdbsupport"
2961     ;;
2962   *\ sim\ *)
2963     configdirs="${configdirs} gnulib"
2964     ;;
2965 esac
2966
2967 # Strip out unwanted targets.
2968
2969 # While at that, we remove Makefiles if we were started for recursive
2970 # configuration, so that the top-level Makefile reconfigures them,
2971 # like we used to do when configure itself was recursive.
2972
2973 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2974 # but now we're fixing up the Makefile ourselves with the additional
2975 # commands passed to AC_CONFIG_FILES.  Use separate variables
2976 # extrasub-{build,host,target} not because there is any reason to split
2977 # the substitutions up that way, but only to remain below the limit of
2978 # 99 commands in a script, for HP-UX sed.
2979
2980 # Do not nest @if/@endif or @unless/@endunless pairs, because
2981 # configure will not warn you at all.
2982
2983 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2984   yes:yes:*\ gold\ *:*,c++,*) ;;
2985   yes:yes:*\ gold\ *:*)
2986     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2987     ;;
2988 esac
2989
2990 extrasub_build=
2991 for module in ${build_configdirs} ; do
2992   if test -z "${no_recursion}" \
2993      && test -f ${build_subdir}/${module}/Makefile; then
2994     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2995     rm -f ${build_subdir}/${module}/Makefile
2996   fi
2997   extrasub_build="$extrasub_build
2998 /^@if build-$module\$/d
2999 /^@endif build-$module\$/d
3000 /^@unless build-$module\$/,/^@endunless build-$module\$/d
3001 /^@if build-$module-$bootstrap_suffix\$/d
3002 /^@endif build-$module-$bootstrap_suffix\$/d
3003 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
3004 done
3005 extrasub_host=
3006 for module in ${configdirs} ; do
3007   if test -z "${no_recursion}"; then
3008     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
3009       if test -f ${file}; then
3010         echo 1>&2 "*** removing ${file} to force reconfigure"
3011         rm -f ${file}
3012       fi
3013     done
3014   fi
3015   case ${module},${bootstrap_fixincludes} in
3016     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
3017     *) host_bootstrap_suffix=$bootstrap_suffix ;;
3018   esac
3019   extrasub_host="$extrasub_host
3020 /^@if $module\$/d
3021 /^@endif $module\$/d
3022 /^@unless $module\$/,/^@endunless $module\$/d
3023 /^@if $module-$host_bootstrap_suffix\$/d
3024 /^@endif $module-$host_bootstrap_suffix\$/d
3025 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
3026 done
3027 extrasub_target=
3028 for module in ${target_configdirs} ; do
3029   if test -z "${no_recursion}" \
3030      && test -f ${target_subdir}/${module}/Makefile; then
3031     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
3032     rm -f ${target_subdir}/${module}/Makefile
3033   fi
3034
3035   # We only bootstrap target libraries listed in bootstrap_target_libs.
3036   case $bootstrap_target_libs in
3037     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
3038     *) target_bootstrap_suffix=no-bootstrap ;;
3039   esac
3040
3041   extrasub_target="$extrasub_target
3042 /^@if target-$module\$/d
3043 /^@endif target-$module\$/d
3044 /^@unless target-$module\$/,/^@endunless target-$module\$/d
3045 /^@if target-$module-$target_bootstrap_suffix\$/d
3046 /^@endif target-$module-$target_bootstrap_suffix\$/d
3047 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
3048 done
3049
3050 # Do the final fixup along with target modules.
3051 extrasub_target="$extrasub_target
3052 /^@if /,/^@endif /d
3053 /^@unless /d
3054 /^@endunless /d"
3055
3056 if test "$enable_pgo_build" != "no"; then
3057   extrasub_build="$extrasub_build
3058 /^@if pgo-build\$/d
3059 /^@endif pgo-build\$/d"
3060 fi
3061
3062 # Create the serialization dependencies.  This uses a temporary file.
3063
3064 AC_ARG_ENABLE([serial-configure],
3065 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
3066                 [force sequential configuration of
3067                  sub-packages for the host, target or build
3068                  machine, or all sub-packages])])
3069
3070 case ${enable_serial_configure} in
3071   yes)
3072     enable_serial_build_configure=yes
3073     enable_serial_host_configure=yes
3074     enable_serial_target_configure=yes
3075     ;;
3076 esac
3077
3078 # These force 'configure's to be done one at a time, to avoid problems
3079 # with contention over a shared config.cache.
3080 rm -f serdep.tmp
3081 echo '# serdep.tmp' > serdep.tmp
3082 olditem=
3083 test "x${enable_serial_build_configure}" = xyes &&
3084 for item in ${build_configdirs} ; do
3085   case ${olditem} in
3086     "") ;;
3087     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
3088   esac
3089   olditem=${item}
3090 done
3091 olditem=
3092 test "x${enable_serial_host_configure}" = xyes &&
3093 for item in ${configdirs} ; do
3094   case ${olditem} in
3095     "") ;;
3096     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
3097   esac
3098   olditem=${item}
3099 done
3100 olditem=
3101 test "x${enable_serial_target_configure}" = xyes &&
3102 for item in ${target_configdirs} ; do
3103   case ${olditem} in
3104     "") ;;
3105     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
3106   esac
3107   olditem=${item}
3108 done
3109 serialization_dependencies=serdep.tmp
3110 AC_SUBST_FILE(serialization_dependencies)
3111
3112 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
3113 # target, nonopt, and variable assignments.  These are the ones we
3114 # might not want to pass down to subconfigures.  The exception being
3115 # --cache-file=/dev/null, which is used to turn off the use of cache
3116 # files altogether, and which should be passed on to subconfigures.
3117 # Also strip program-prefix, program-suffix, and program-transform-name,
3118 # so that we can pass down a consistent program-transform-name.
3119 baseargs=
3120 tbaseargs=
3121 keep_next=no
3122 skip_next=no
3123 eval "set -- $ac_configure_args"
3124 for ac_arg
3125 do
3126   if test X"$skip_next" = X"yes"; then
3127     skip_next=no
3128     continue
3129   fi
3130   if test X"$keep_next" = X"yes"; then
3131     case $ac_arg in
3132       *\'*)
3133         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3134     esac
3135     baseargs="$baseargs '$ac_arg'"
3136     tbaseargs="$tbaseargs '$ac_arg'"
3137     keep_next=no
3138     continue
3139   fi
3140
3141   # Handle separated arguments.  Based on the logic generated by
3142   # autoconf 2.59.
3143   case $ac_arg in
3144     *=* | --config-cache | -C | -disable-* | --disable-* \
3145       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3146       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3147       | -with-* | --with-* | -without-* | --without-* | --x)
3148       separate_arg=no
3149       ;;
3150     -*)
3151       separate_arg=yes
3152       ;;
3153     *)
3154       separate_arg=no
3155       ;;
3156   esac
3157
3158   skip_targ=no
3159   case $ac_arg in
3160 changequote(,)
3161   --with-* | --without-*)
3162     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3163
3164     case $libopt in
3165     *[-_]include)
3166       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3167       ;;
3168     *[-_]lib)
3169       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3170       ;;
3171     *)
3172       lib=$libopt
3173       ;;
3174     esac
3175 changequote([,])
3176
3177     case $lib in
3178     mpc | mpfr | gmp | isl)
3179       # If we're processing --with-$lib, --with-$lib-include or
3180       # --with-$lib-lib, for one of the libs above, and target is
3181       # different from host, don't pass the current argument to any
3182       # target library's configure.
3183       if test x$is_cross_compiler = xyes; then
3184         skip_targ=yes
3185       fi
3186       ;;
3187     esac
3188     ;;
3189   esac
3190
3191   case "$ac_arg" in
3192     --cache-file=/dev/null | \
3193     -cache-file=/dev/null )
3194       # Handled here to avoid the test to skip args below.
3195       baseargs="$baseargs '$ac_arg'"
3196       tbaseargs="$tbaseargs '$ac_arg'"
3197       # Assert: $separate_arg should always be no.
3198       keep_next=$separate_arg
3199       ;;
3200     --no*)
3201       continue
3202       ;;
3203     --c* | \
3204     --sr* | \
3205     --ho* | \
3206     --bu* | \
3207     --t* | \
3208     --program-* | \
3209     -cache_file* | \
3210     -srcdir* | \
3211     -host* | \
3212     -build* | \
3213     -target* | \
3214     -program-prefix* | \
3215     -program-suffix* | \
3216     -program-transform-name* )
3217       skip_next=$separate_arg
3218       continue
3219       ;;
3220     -*)
3221       # An option.  Add it.
3222       case $ac_arg in
3223         *\'*)
3224           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3225       esac
3226       baseargs="$baseargs '$ac_arg'"
3227       if test X"$skip_targ" = Xno; then
3228         tbaseargs="$tbaseargs '$ac_arg'"
3229       fi
3230       keep_next=$separate_arg
3231       ;;
3232     *)
3233       # Either a variable assignment, or a nonopt (triplet).  Don't
3234       # pass it down; let the Makefile handle this.
3235       continue
3236       ;;
3237   esac
3238 done
3239 # Remove the initial space we just introduced and, as these will be
3240 # expanded by make, quote '$'.
3241 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3242
3243 # Add in --program-transform-name, after --program-prefix and
3244 # --program-suffix have been applied to it.  Autoconf has already
3245 # doubled dollar signs and backslashes in program_transform_name; we want
3246 # the backslashes un-doubled, and then the entire thing wrapped in single
3247 # quotes, because this will be expanded first by make and then by the shell.
3248 # Also, because we want to override the logic in subdir configure scripts to
3249 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3250 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3251 ${program_transform_name}
3252 EOF_SED
3253 gcc_transform_name=`cat conftestsed.out`
3254 rm -f conftestsed.out
3255 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3256 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3257 if test "$silent" = yes; then
3258   baseargs="$baseargs --silent"
3259   tbaseargs="$tbaseargs --silent"
3260 fi
3261 baseargs="$baseargs --disable-option-checking"
3262 tbaseargs="$tbaseargs --disable-option-checking"
3263
3264 # Record and document user additions to sub configure arguments.
3265 AC_ARG_VAR([build_configargs],
3266            [additional configure arguments for build directories])
3267 AC_ARG_VAR([host_configargs],
3268            [additional configure arguments for host directories])
3269 AC_ARG_VAR([target_configargs],
3270            [additional configure arguments for target directories])
3271
3272 # For the build-side libraries, we just need to pretend we're native,
3273 # and not use the same cache file.  Multilibs are neither needed nor
3274 # desired.  We can't even use the same cache file for all build-side
3275 # libraries, as they're compiled differently; some with C, some with
3276 # C++ or with different feature-enabling options.
3277 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3278
3279 # For host modules, accept cache file option, or specification as blank.
3280 case "${cache_file}" in
3281 "") # empty
3282   cache_file_option="" ;;
3283 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3284   cache_file_option="--cache-file=${cache_file}" ;;
3285 *) # relative path
3286   cache_file_option="--cache-file=../${cache_file}" ;;
3287 esac
3288
3289 # Host dirs don't like to share a cache file either, horribly enough.
3290 # This seems to be due to autoconf 2.5x stupidity.
3291 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3292
3293 target_configargs="$target_configargs ${tbaseargs}"
3294
3295 # Passing a --with-cross-host argument lets the target libraries know
3296 # whether they are being built with a cross-compiler or being built
3297 # native.  However, it would be better to use other mechanisms to make the
3298 # sorts of decisions they want to make on this basis.  Please consider
3299 # this option to be deprecated.  FIXME.
3300 if test x${is_cross_compiler} = xyes ; then
3301   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3302 fi
3303
3304 # Special user-friendly check for native x86_64-linux build, if
3305 # multilib is not explicitly enabled.
3306 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3307   x86_64-*linux*:yes:$build:$build:)
3308     # Make sure we have a development environment that handles 32-bit
3309     dev64=no
3310     echo "int main () { return 0; }" > conftest.c
3311     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3312     if test $? = 0 ; then
3313       if test -s conftest || test -s conftest.exe ; then
3314         dev64=yes
3315       fi
3316     fi
3317     rm -f conftest*
3318     if test x${dev64} != xyes ; then
3319       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.])
3320     fi
3321     ;;
3322 esac
3323
3324 # Default to --enable-multilib.
3325 if test x${enable_multilib} = x ; then
3326   target_configargs="--enable-multilib ${target_configargs}"
3327 fi
3328
3329 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3330 # changed from the earlier setting of with_newlib.
3331 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3332   target_configargs="--with-newlib ${target_configargs}"
3333 fi
3334
3335 # Different target subdirs use different values of certain variables
3336 # (notably CXX).  Worse, multilibs use *lots* of different values.
3337 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3338 # it doesn't automatically accept command-line overrides of them.
3339 # This means it's not safe for target subdirs to share a cache file,
3340 # which is disgusting, but there you have it.  Hopefully this can be
3341 # fixed in future.  It's still worthwhile to use a cache file for each
3342 # directory.  I think.
3343
3344 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3345 # We need to pass --target, as newer autoconf's requires consistency
3346 # for target_alias and gcc doesn't manage it consistently.
3347 target_configargs="--cache-file=./config.cache ${target_configargs}"
3348
3349 FLAGS_FOR_TARGET=
3350 case " $target_configdirs " in
3351  *" newlib "*)
3352   case " $target_configargs " in
3353   *" --with-newlib "*)
3354    case "$target" in
3355     *-cygwin*)
3356       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3357       ;;
3358    esac
3359
3360    # If we're not building GCC, don't discard standard headers.
3361    if test -d ${srcdir}/gcc; then
3362      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3363
3364      if test "${build}" != "${host}"; then
3365        # On Canadian crosses, CC_FOR_TARGET will have already been set
3366        # by `configure', so we won't have an opportunity to add -Bgcc/
3367        # to it.  This is right: we don't want to search that directory
3368        # for binaries, but we want the header files in there, so add
3369        # them explicitly.
3370        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3371
3372        # Someone might think of using the pre-installed headers on
3373        # Canadian crosses, in case the installed compiler is not fully
3374        # compatible with the compiler being built.  In this case, it
3375        # would be better to flag an error than risking having
3376        # incompatible object files being constructed.  We can't
3377        # guarantee that an error will be flagged, but let's hope the
3378        # compiler will do it, when presented with incompatible header
3379        # files.
3380      fi
3381    fi
3382
3383    case "${target}-${is_cross_compiler}" in
3384    i[[3456789]]86-*-linux*-no)
3385       # Here host == target, so we don't need to build gcc,
3386       # so we don't want to discard standard headers.
3387       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3388       ;;
3389    *)
3390       # If we're building newlib, use its generic headers last, but search
3391       # for any libc-related directories first (so make it the last -B
3392       # switch).
3393       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3394
3395       # If we're building libgloss, find the startup file, simulator library
3396       # and linker script.
3397       case " $target_configdirs " in
3398         *" libgloss "*)
3399         # Look for startup file, simulator library and maybe linker script.
3400         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3401         # Look for libnosys.a in case the target needs it.
3402         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3403         # Most targets have the linker script in the source directory.
3404         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3405         ;;
3406       esac
3407       ;;
3408    esac
3409    ;;
3410   esac
3411   ;;
3412 esac
3413
3414 case "$target" in
3415   x86_64-*mingw* | *-w64-mingw*)
3416   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3417   # however, use a symlink named 'mingw' in ${prefix} .
3418     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3419     ;;
3420   *-mingw*)
3421   # MinGW can't be handled as Cygwin above since it does not use newlib.
3422     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3423     ;;
3424 esac
3425
3426 # Allow the user to override the flags for
3427 # our build compiler if desired.
3428 if test x"${build}" = x"${host}" ; then
3429   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3430   CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
3431   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3432   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3433 fi
3434
3435 # On Canadian crosses, we'll be searching the right directories for
3436 # the previously-installed cross compiler, so don't bother to add
3437 # flags for directories within the install tree of the compiler
3438 # being built; programs in there won't even run.
3439 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3440   # Search for pre-installed headers if nothing else fits.
3441   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3442 fi
3443
3444 if test "x${use_gnu_ld}" = x &&
3445    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3446   # Arrange for us to find uninstalled linker scripts.
3447   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3448 fi
3449
3450 # Search for other target-specific linker scripts and such.
3451 case "${target}" in
3452   mep*)
3453     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3454     ;;
3455 esac
3456
3457 # Makefile fragments.
3458 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3459 do
3460   eval fragval=\$$frag
3461   if test $fragval != /dev/null; then
3462     eval $frag=${srcdir}/$fragval
3463   fi
3464 done
3465 AC_SUBST_FILE(host_makefile_frag)
3466 AC_SUBST_FILE(target_makefile_frag)
3467 AC_SUBST_FILE(alphaieee_frag)
3468 AC_SUBST_FILE(ospace_frag)
3469
3470 # Miscellanea: directories, flags, etc.
3471 AC_SUBST(RPATH_ENVVAR)
3472 AC_SUBST(GCC_SHLIB_SUBDIR)
3473 AC_SUBST(tooldir)
3474 AC_SUBST(build_tooldir)
3475 AC_SUBST(CONFIGURE_GDB_TK)
3476 AC_SUBST(GDB_TK)
3477 AC_SUBST(INSTALL_GDB_TK)
3478
3479 # Build module lists & subconfigure args.
3480 AC_SUBST(build_configargs)
3481 AC_SUBST(build_configdirs)
3482
3483 # Host module lists & subconfigure args.
3484 AC_SUBST(host_configargs)
3485 AC_SUBST(configdirs)
3486 AC_SUBST(target_configdirs)
3487
3488 # Target module lists & subconfigure args.
3489 AC_SUBST(target_configargs)
3490
3491
3492 # Build tools.
3493 AC_SUBST(AR_FOR_BUILD)
3494 AC_SUBST(AS_FOR_BUILD)
3495 AC_SUBST(CC_FOR_BUILD)
3496 AC_SUBST(CFLAGS_FOR_BUILD)
3497 AC_SUBST(CPP_FOR_BUILD)
3498 AC_SUBST(CPPFLAGS_FOR_BUILD)
3499 AC_SUBST(CXXFLAGS_FOR_BUILD)
3500 AC_SUBST(CXX_FOR_BUILD)
3501 AC_SUBST(DLLTOOL_FOR_BUILD)
3502 AC_SUBST(DSYMUTIL_FOR_BUILD)
3503 AC_SUBST(GFORTRAN_FOR_BUILD)
3504 AC_SUBST(GOC_FOR_BUILD)
3505 AC_SUBST(GDC_FOR_BUILD)
3506 AC_SUBST(LDFLAGS_FOR_BUILD)
3507 AC_SUBST(LD_FOR_BUILD)
3508 AC_SUBST(NM_FOR_BUILD)
3509 AC_SUBST(RANLIB_FOR_BUILD)
3510 AC_SUBST(WINDMC_FOR_BUILD)
3511 AC_SUBST(WINDRES_FOR_BUILD)
3512
3513 # Generate default definitions for YACC, M4, LEX and other programs that run
3514 # on the build machine.  These are used if the Makefile can't locate these
3515 # programs in objdir.
3516 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3517
3518 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3519 case " $build_configdirs " in
3520   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3521 esac
3522
3523 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3524 case " $build_configdirs " in
3525   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3526 esac
3527
3528 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3529 case " $build_configdirs " in
3530   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3531 esac
3532
3533 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3534 case " $build_configdirs " in
3535   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3536   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3537 esac
3538
3539 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3540 case " $build_configdirs " in
3541   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3542 esac
3543
3544 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3545 case " $build_configdirs " in
3546   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3547   *)
3548 changequote(,)
3549     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3550     # higher, else we use the "missing" dummy.
3551     if ${MAKEINFO} --version \
3552        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3553       :
3554     else
3555       MAKEINFO="$MISSING makeinfo"
3556     fi
3557     ;;
3558 changequote([,])
3559 esac
3560
3561 # FIXME: expect and dejagnu may become build tools?
3562
3563 AC_CHECK_PROGS(EXPECT, expect, expect)
3564 case " $configdirs " in
3565   *" expect "*)
3566     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3567     ;;
3568 esac
3569
3570 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3571 case " $configdirs " in
3572   *" dejagnu "*)
3573     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3574     ;;
3575 esac
3576
3577
3578 # Host tools.
3579 NCN_STRICT_CHECK_TOOLS(AR, ar)
3580 NCN_STRICT_CHECK_TOOLS(AS, as)
3581 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3582 NCN_STRICT_CHECK_TOOLS(DSYMUTIL, dsymutil)
3583 NCN_STRICT_CHECK_TOOLS(LD, ld)
3584 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3585 NCN_STRICT_CHECK_TOOLS(NM, nm)
3586 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3587 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3588 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3589 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3590 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3591 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3592 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3593 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3594 AC_SUBST(CC)
3595 AC_SUBST(CXX)
3596 AC_SUBST(CFLAGS)
3597 AC_SUBST(CXXFLAGS)
3598 AC_SUBST(GDC)
3599 AC_SUBST(GDCFLAGS)
3600
3601 # Target tools.
3602 AC_ARG_WITH([build-time-tools],
3603   [AS_HELP_STRING([--with-build-time-tools=PATH],
3604                   [use given path to find target tools during the build])],
3605   [case x"$withval" in
3606      x/*) ;;
3607      *)
3608        with_build_time_tools=
3609        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3610        ;;
3611    esac],
3612   [with_build_time_tools=])
3613
3614 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3615 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3616 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3617 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3618 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3619 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3620
3621 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3622 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3623 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3624 ACX_CHECK_INSTALLED_TARGET_TOOL(DSYMUTIL_FOR_TARGET, dsymutil)
3625 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3626 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3627 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3628 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3629 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3630 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3631 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3632 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3633 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3634 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3635 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3636
3637 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3638
3639 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3640 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3641 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3642 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3643 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3644                 [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],
3645                 c++)
3646 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3647                 [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],
3648                 c++)
3649 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3650 GCC_TARGET_TOOL(dsymutil, DSYMUTIL_FOR_TARGET, DSYMUTIL)
3651 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3652 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3653                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3654 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3655                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3656 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3657                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3658 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3659 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3660 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3661 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3662 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3663 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3664 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3665 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3666 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3667 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3668 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3669
3670 AC_SUBST(FLAGS_FOR_TARGET)
3671 AC_SUBST(RAW_CXX_FOR_TARGET)
3672
3673 # Certain tools may need extra flags.
3674 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3675 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3676 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3677
3678 # When building target libraries, except in a Canadian cross, we use
3679 # the same toolchain as the compiler we just built.
3680 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3681 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3682 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3683 if test $host = $build; then
3684   case " $configdirs " in
3685     *" gcc "*)
3686       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3687       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3688       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3689       ;;
3690   esac
3691 fi
3692
3693 AC_SUBST(COMPILER_AS_FOR_TARGET)
3694 AC_SUBST(COMPILER_LD_FOR_TARGET)
3695 AC_SUBST(COMPILER_NM_FOR_TARGET)
3696
3697 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3698 AC_ARG_ENABLE(maintainer-mode,
3699 [AS_HELP_STRING([--enable-maintainer-mode],
3700                 [enable make rules and dependencies not useful
3701                  (and sometimes confusing) to the casual installer])],
3702       USE_MAINTAINER_MODE=$enableval,
3703       USE_MAINTAINER_MODE=no)
3704 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3705 AC_SUBST(MAINTAINER_MODE_TRUE)
3706 AC_SUBST(MAINTAINER_MODE_FALSE)
3707 if test "$USE_MAINTAINER_MODE" = yes; then
3708   MAINTAINER_MODE_TRUE=
3709   MAINTAINER_MODE_FALSE='#'
3710 else
3711   MAINTAINER_MODE_TRUE='#'
3712   MAINTAINER_MODE_FALSE=
3713 fi
3714 MAINT=$MAINTAINER_MODE_TRUE
3715 AC_SUBST(MAINT)dnl
3716
3717 # ---------------------
3718 # GCC bootstrap support
3719 # ---------------------
3720
3721 # Stage specific cflags for build.
3722 stage1_cflags="-g"
3723 case $build in
3724   vax-*-*)
3725     case ${GCC} in
3726       yes) stage1_cflags="-g -Wa,-J" ;;
3727       *) stage1_cflags="-g -J" ;;
3728     esac ;;
3729 esac
3730
3731 AC_SUBST(stage1_cflags)
3732
3733 # Enable --enable-checking in stage1 of the compiler.
3734 AC_ARG_ENABLE(stage1-checking,
3735 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3736                 [choose additional checking for stage1 of the compiler])],
3737 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3738 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3739   # For --disable-checking or implicit --enable-checking=release, avoid
3740   # setting --enable-checking=gc in the default stage1 checking for LTO
3741   # bootstraps.  See PR62077.
3742   case $BUILD_CONFIG in
3743     *lto*)
3744       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3745     *)
3746       stage1_checking=--enable-checking=yes,types;;
3747   esac
3748   if test "x$enable_checking" = x && \
3749      test -d ${srcdir}/gcc && \
3750      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3751     stage1_checking=--enable-checking=yes,types,extra
3752   fi
3753 else
3754   stage1_checking=--enable-checking=$enable_checking,types
3755 fi])
3756 AC_SUBST(stage1_checking)
3757
3758 # Enable -Werror in bootstrap stage2 and later.
3759 AC_ARG_ENABLE(werror,
3760 [AS_HELP_STRING([--enable-werror],
3761                 [enable -Werror in bootstrap stage2 and later])],
3762 [
3763 case ${enable_werror} in
3764   yes) stage2_werror_flag="--enable-werror-always" ;;
3765   *) stage2_werror_flag="" ;;
3766 esac
3767 ],
3768 [
3769 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3770   case $BUILD_CONFIG in
3771   bootstrap-debug)
3772       stage2_werror_flag="--enable-werror-always" ;;
3773   "")
3774       stage2_werror_flag="--enable-werror-always" ;;
3775   esac
3776 fi
3777 ])
3778
3779 AC_SUBST(stage2_werror_flag)
3780
3781 # Specify what files to not compare during bootstrap.
3782
3783 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3784 case "$target" in
3785   hppa*64*-*-hpux*) ;;
3786   hppa*-*-hpux*) compare_exclusions="$compare_exclusions | */libgcc/lib2funcs* | gcc/function-tests.o" ;;
3787   powerpc*-ibm-aix*) compare_exclusions="$compare_exclusions | *libgomp*\$(objext)" ;;
3788 esac
3789 AC_SUBST(compare_exclusions)
3790
3791 AC_CONFIG_FILES([Makefile],
3792   [sed "$extrasub_build" Makefile |
3793    sed "$extrasub_host" |
3794    sed "$extrasub_target" > mf$$
3795    mv -f mf$$ Makefile],
3796   [extrasub_build="$extrasub_build"
3797    extrasub_host="$extrasub_host"
3798    extrasub_target="$extrasub_target"])
3799 AC_OUTPUT