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/gcc-plugin.m4)
  27 m4_include(config/ax_cxx_compile_stdcxx.m4)
  28 m4_include([libtool.m4])
  29 m4_include([ltoptions.m4])
  30 m4_include([ltsugar.m4])
  31 m4_include([ltversion.m4])
  32 m4_include([lt~obsolete.m4])
  33 m4_include([config/isl.m4])
  34
  35 AC_INIT(move-if-change)
  36 AC_DISABLE_OPTION_CHECKING
  37
  38 progname=$0
  39 # if PWD already has a value, it is probably wrong.
  40 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  41
  42 # Export original configure arguments for use by sub-configures.
  43 # Quote arguments with shell meta charatcers.
  44 TOPLEVEL_CONFIGURE_ARGUMENTS=
  45 set -- "$progname" "$@"
  46 for ac_arg
  47 do
  48   case "$ac_arg" in
  49   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  50     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  51     # if the argument is of the form -foo=baz, quote the baz part only
  52     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  53   *) ;;
  54   esac
  55   # Add the quoted argument to the list.
  56   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  57 done
  58 if test "$silent" = yes; then
  59   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  60 fi
  61 # Remove the initial space we just introduced and, as these will be
  62 # expanded by make, quote '$'.
  63 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  64 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  65
  66 # Find the build, host, and target systems.
  67 ACX_NONCANONICAL_BUILD
  68 ACX_NONCANONICAL_HOST
  69 ACX_NONCANONICAL_TARGET
  70
  71 dnl Autoconf 2.5x and later will set a default program prefix if
  72 dnl --target was used, even if it was the same as --host.  Disable
  73 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  74 dnl to take effect.
  75 test "$host_noncanonical" = "$target_noncanonical" &&
  76   test "$program_prefix$program_suffix$program_transform_name" = \
  77     NONENONEs,x,x, &&
  78   program_transform_name=s,y,y,
  79
  80 AC_CANONICAL_SYSTEM
  81 AC_ARG_PROGRAM
  82
  83 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  84 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  85
  86 # Get 'install' or 'install-sh' and its variants.
  87 AC_PROG_INSTALL
  88 ACX_PROG_LN
  89 AC_PROG_LN_S
  90 AC_PROG_SED
  91 AC_PROG_AWK
  92
  93 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  94
  95 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  96 # a relative path.
  97 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  98   INSTALL="${srcpwd}/install-sh -c"
  99 fi
 100
 101 # Set srcdir to "." if that's what it is.
 102 # This is important for multilib support.
 103 pwd=`${PWDCMD-pwd}`
 104 if test "${pwd}" = "${srcpwd}" ; then
 105   srcdir=.
 106 fi
 107
 108 topsrcdir=$srcpwd
 109
 110 extra_host_args=
 111
 112 ### To add a new directory to the tree, first choose whether it is a target
 113 ### or a host dependent tool.  Then put it into the appropriate list
 114 ### (library or tools, host or target), doing a dependency sort.
 115
 116 # Subdirs will be configured in the order listed in build_configdirs,
 117 # configdirs, or target_configdirs; see the serialization section below.
 118
 119 # Dependency sorting is only needed when *configuration* must be done in
 120 # a particular order.  In all cases a dependency should be specified in
 121 # the Makefile, whether or not it's implicitly specified here.
 122
 123 # Double entries in build_configdirs, configdirs, or target_configdirs may
 124 # cause circular dependencies and break everything horribly.
 125
 126 # these library is used by various programs built for the build
 127 # environment
 128 #
 129 build_libs="build-libiberty build-libcpp"
 130
 131 # these tools are built for the build environment
 132 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 133
 134 # these libraries are used by various programs built for the host environment
 135 #f
 136 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libcody libdecnumber gmp mpfr mpc isl libiconv libctf libsframe"
 137
 138 # these tools are built for the host environment
 139 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 140 # know that we are building the simulator.
 141 # binutils, gas and ld appear in that order because it makes sense to run
 142 # "make check" in that particular order.
 143 # If --enable-gold is used, "gold" may replace "ld".
 144 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gdbserver gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools c++tools"
 145
 146 # these libraries are built for the target environment, and are built after
 147 # the host libraries and the host tools (which may be a cross compiler)
 148 # Note that libiberty is not a target library.
 149 target_libraries="target-libgcc \
 150                 target-libbacktrace \
 151                 target-libgloss \
 152                 target-newlib \
 153                 target-libgomp \
 154                 target-liboffloadmic \
 155                 target-libatomic \
 156                 target-libitm \
 157                 target-libstdc++-v3 \
 158                 target-libsanitizer \
 159                 target-libvtv \
 160                 target-libssp \
 161                 target-libquadmath \
 162                 target-libgfortran \
 163                 target-libffi \
 164                 target-libobjc \
 165                 target-libada \
 166                 target-libgo \
 167                 target-libphobos \
 168                 target-zlib"
 169
 170 # these tools are built using the target libraries, and are intended to
 171 # run only in the target environment
 172 #
 173 # note: any program that *uses* libraries that are in the "target_libraries"
 174 # list belongs in this list.
 175 #
 176 target_tools="target-rda"
 177
 178 ################################################################################
 179
 180 ## All tools belong in one of the four categories, and are assigned above
 181 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 182 ## is important because configure will choke if they ever get through.
 183 ## ${configdirs} is directories we build using the host tools.
 184 ## ${target_configdirs} is directories we build using the target tools.
 185 configdirs=`echo ${host_libs} ${host_tools}`
 186 target_configdirs=`echo ${target_libraries} ${target_tools}`
 187 build_configdirs=`echo ${build_libs} ${build_tools}`
 188
 189 m4_divert_text([PARSE_ARGS],
 190 [case $srcdir in
 191   *" "*)
 192 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 193     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 194 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 195     ;;
 196 esac
 197 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 198 ])
 199
 200 ################################################################################
 201
 202 srcname="gnu development package"
 203
 204 # This gets set non-empty for some net releases of packages.
 205 appdirs=""
 206
 207 # Define is_cross_compiler to save on calls to 'test'.
 208 is_cross_compiler=
 209 if test x"${host}" = x"${target}" ; then
 210   is_cross_compiler=no
 211 else
 212   is_cross_compiler=yes
 213 fi
 214
 215 # Find the build and target subdir names.
 216 GCC_TOPLEV_SUBDIRS
 217 # Be sure to cover against remnants of an in-tree build.
 218 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 219   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 220 Use a pristine source tree when building in a separate tree])
 221 fi
 222
 223 # Skipdirs are removed silently.
 224 skipdirs=
 225 # Noconfigdirs are removed loudly.
 226 noconfigdirs=""
 227
 228 use_gnu_ld=
 229 # Make sure we don't let GNU ld be added if we didn't want it.
 230 if test x$with_gnu_ld = xno ; then
 231   use_gnu_ld=no
 232   noconfigdirs="$noconfigdirs ld gold"
 233 fi
 234
 235 use_gnu_as=
 236 # Make sure we don't let GNU as be added if we didn't want it.
 237 if test x$with_gnu_as = xno ; then
 238   use_gnu_as=no
 239   noconfigdirs="$noconfigdirs gas"
 240 fi
 241
 242 use_included_zlib=
 243 AC_ARG_WITH(system-zlib,
 244 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 245 # Make sure we don't let ZLIB be added if we didn't want it.
 246 if test x$with_system_zlib = xyes ; then
 247   use_included_zlib=no
 248   noconfigdirs="$noconfigdirs zlib"
 249 fi
 250
 251 # Don't compile the bundled readline/libreadline.a if --with-system-readline
 252 # is provided.
 253 if test x$with_system_readline = xyes ; then
 254   noconfigdirs="$noconfigdirs readline"
 255 fi
 256
 257 AC_ARG_WITH(zstd,
 258 [AS_HELP_STRING([--with-zstd], [Support zstd compressed debug sections (default=auto)])])
 259
 260 # some tools are so dependent upon X11 that if we're not building with X,
 261 # it's not even worth trying to configure, much less build, that tool.
 262
 263 case ${with_x} in
 264   yes | "") ;; # the default value for this tree is that X11 is available
 265   no)
 266     skipdirs="${skipdirs} tk itcl libgui"
 267     # We won't be able to build gdbtk without X.
 268     enable_gdbtk=no
 269     ;;
 270   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 271 esac
 272
 273 # Some are only suitable for cross toolchains.
 274 # Remove these if host=target.
 275 cross_only="target-libgloss target-newlib target-opcodes"
 276
 277 case $is_cross_compiler in
 278   no) skipdirs="${skipdirs} ${cross_only}" ;;
 279 esac
 280
 281 # If both --with-headers and --with-libs are specified, default to
 282 # --without-newlib.
 283 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 284    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 285   if test x"${with_newlib}" = x ; then
 286     with_newlib=no
 287   fi
 288 fi
 289
 290 # Recognize --with-newlib/--without-newlib.
 291 case ${with_newlib} in
 292   no) skipdirs="${skipdirs} target-newlib" ;;
 293   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 294 esac
 295
 296 AC_ARG_ENABLE(as-accelerator-for,
 297 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 298                 [build as offload target compiler.
 299                 Specify offload host triple by ARG])])
 300
 301 AC_ARG_ENABLE(offload-targets,
 302 [AS_HELP_STRING([--enable-offload-targets=LIST],
 303                 [enable offloading to devices from comma-separated LIST of
 304                 TARGET[=DIR]. Use optional path to find offload target compiler
 305                 during the build])],
 306 [
 307   if test x"$enable_offload_targets" = x; then
 308     AC_MSG_ERROR([no offload targets specified])
 309   fi
 310 ], [enable_offload_targets=])
 311
 312 AC_ARG_ENABLE(offload-defaulted,
 313 [AS_HELP_STRING([--enable-offload-defaulted]
 314                 [If enabled, configured but not installed offload compilers and
 315                 libgomp plugins are silently ignored.  Useful for distribution
 316                 compilers where those are in separate optional packages.])],
 317 [enable_offload_defaulted=$enableval],
 318 [enable_offload_defaulted=])
 319
 320 # Handle --enable-gold, --enable-ld.
 321 # --disable-gold [--enable-ld]
 322 #     Build only ld.  Default option.
 323 # --enable-gold [--enable-ld]
 324 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 325 #     as "ld.bfd" and "ld".
 326 # --enable-gold=default [--enable-ld]
 327 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 328 #     install ld as "ld.bfd".
 329 # --enable-gold[=default] --disable-ld
 330 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 331 # --enable-gold --enable-ld=default
 332 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 333 #     and ld.bfd).
 334 #     In other words, ld is default
 335 # --enable-gold=default --enable-ld=default
 336 #     Error.
 337
 338 default_ld=
 339 AC_ARG_ENABLE(gold,
 340 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 341                 [build gold @<:@ARG={default,yes,no}@:>@])],
 342 ENABLE_GOLD=$enableval,
 343 ENABLE_GOLD=no)
 344 case "${ENABLE_GOLD}" in
 345   yes|default)
 346     # Check for ELF target.
 347     is_elf=no
 348     case "${target}" in
 349       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 350       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 351       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 352       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 353         case "${target}" in
 354           *-*-linux*aout* | *-*-linux*oldld*)
 355             ;;
 356           *)
 357             is_elf=yes
 358             ;;
 359         esac
 360     esac
 361
 362     if test "$is_elf" = "yes"; then
 363       # Check for target supported by gold.
 364       case "${target}" in
 365         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 366         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-* | loongarch*-*-*)
 367           configdirs="$configdirs gold"
 368           if test x${ENABLE_GOLD} = xdefault; then
 369             default_ld=gold
 370           fi
 371           ENABLE_GOLD=yes
 372           ;;
 373       esac
 374     fi
 375     ;;
 376   no)
 377     ;;
 378   *)
 379     AC_MSG_ERROR([invalid --enable-gold argument])
 380     ;;
 381 esac
 382
 383 AC_ARG_ENABLE(ld,
 384 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 385                 [build ld @<:@ARG={default,yes,no}@:>@])],
 386 ENABLE_LD=$enableval,
 387 ENABLE_LD=yes)
 388
 389 case "${ENABLE_LD}" in
 390   default)
 391     if test x${default_ld} != x; then
 392       AC_MSG_ERROR([either gold or ld can be the default ld])
 393     fi
 394     ;;
 395   yes)
 396     ;;
 397   no)
 398     if test x${ENABLE_GOLD} != xyes; then
 399       AC_MSG_WARN([neither ld nor gold are enabled])
 400     fi
 401     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 402     ;;
 403   *)
 404     AC_MSG_ERROR([invalid --enable-ld argument])
 405     ;;
 406 esac
 407
 408 AC_ARG_ENABLE(gprofng,
 409 [AS_HELP_STRING([[--enable-gprofng[=ARG]]],
 410                 [build gprofng @<:@ARG={yes,no}@:>@])],
 411 enable_gprofng=$enableval,
 412 enable_gprofng=yes)
 413 if test "$enable_gprofng" = "yes"; then
 414   case "${target}" in
 415     x86_64-*-linux* | i?86-*-linux* | aarch64-*-linux*)
 416     configdirs="$configdirs gprofng"
 417     ;;
 418   esac
 419 fi
 420
 421
 422 # PR gas/19109
 423 # Decide the default method for compressing debug sections.
 424 # Provide a configure time option to override our default.
 425 AC_ARG_ENABLE(compressed_debug_sections,
 426 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 427                 [Enable compressed debug sections for gas, gold or ld by
 428                  default])],
 429 [
 430   if test x"$enable_compressed_debug_sections" = xyes; then
 431     AC_MSG_ERROR([no program with compressed debug sections specified])
 432   fi
 433 ], [enable_compressed_debug_sections=])
 434
 435 # Select default compression algorithm.
 436 AC_ARG_ENABLE(default_compressed_debug_sections_algorithm,
 437 [AS_HELP_STRING([--enable-default-compressed-debug-sections-algorithm={zlib,zstd}],
 438                 [Default compression algorithm for --enable-compressed-debug-sections.])],
 439 [], [default_compressed_debug_sections_algorithm=])
 440
 441 # Configure extra directories which are host specific
 442
 443 case "${host}" in
 444   *-cygwin*)
 445     configdirs="$configdirs libtermcap" ;;
 446 esac
 447
 448 # A target can indicate whether a language isn't supported for some reason.
 449 # Only spaces may be used in this macro; not newlines or tabs.
 450 unsupported_languages=
 451
 452 # Remove more programs from consideration, based on the host or
 453 # target this usually means that a port of the program doesn't
 454 # exist yet.
 455
 456 case "${host}" in
 457   i[[3456789]]86-*-msdosdjgpp*)
 458     noconfigdirs="$noconfigdirs tcl tk itcl"
 459     ;;
 460 esac
 461
 462 # Default to --disable-year2038 until we can handle differences between
 463 # projects that use gnulib (which understands year 2038) and projects that
 464 # do not (like BFD).
 465 AC_ARG_ENABLE(year2038,
 466 AS_HELP_STRING([--enable-year2038],
 467   [enable support for timestamps past the year 2038]),
 468 ENABLE_YEAR2038=$enableval,
 469 ENABLE_YEAR2038=no)
 470 enable_year2038=
 471 if test "${ENABLE_YEAR2038}" = "no" ; then
 472   enable_year2038=no
 473 fi
 474
 475 AC_ARG_ENABLE(libquadmath,
 476 AS_HELP_STRING([--disable-libquadmath],
 477   [do not build libquadmath directory]),
 478 ENABLE_LIBQUADMATH=$enableval,
 479 ENABLE_LIBQUADMATH=yes)
 480 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 481   noconfigdirs="$noconfigdirs target-libquadmath"
 482 fi
 483
 484
 485 AC_ARG_ENABLE(libquadmath-support,
 486 AS_HELP_STRING([--disable-libquadmath-support],
 487   [disable libquadmath support for Fortran]),
 488 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 489 ENABLE_LIBQUADMATH_SUPPORT=yes)
 490 enable_libquadmath_support=
 491 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 492   enable_libquadmath_support=no
 493 fi
 494
 495
 496 AC_ARG_ENABLE(libada,
 497 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 498 ENABLE_LIBADA=$enableval,
 499 ENABLE_LIBADA=yes)
 500 if test "${ENABLE_LIBADA}" != "yes" ; then
 501   noconfigdirs="$noconfigdirs gnattools"
 502 fi
 503
 504 AC_ARG_ENABLE(libssp,
 505 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 506 ENABLE_LIBSSP=$enableval,
 507 ENABLE_LIBSSP=yes)
 508
 509 AC_ARG_ENABLE(libstdcxx,
 510 AS_HELP_STRING([--disable-libstdcxx],
 511   [do not build libstdc++-v3 directory]),
 512 ENABLE_LIBSTDCXX=$enableval,
 513 ENABLE_LIBSTDCXX=default)
 514 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 515   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 516 fi]
 517
 518 # If this is accelerator compiler and its target is intelmic we enable
 519 # target liboffloadmic by default.  If this is compiler with offloading
 520 # for intelmic we enable host liboffloadmic by default.  Otherwise
 521 # liboffloadmic is disabled by default.
 522 AC_ARG_ENABLE([liboffloadmic],
 523 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 524                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 525 [case "$enableval" in
 526   no | host | target)
 527     enable_liboffloadmic=$enableval ;;
 528   *)
 529     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 530 esac],
 531 [if test x"$enable_as_accelerator_for" != x; then
 532   case "${target}" in
 533     *-intelmic-* | *-intelmicemul-*)
 534       enable_liboffloadmic=target
 535       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 536       ;;
 537     *)
 538       enable_liboffloadmic=no
 539       ;;
 540   esac
 541 else
 542   case "${enable_offload_targets}" in
 543     *-intelmic-* | *-intelmicemul-*)
 544       enable_liboffloadmic=host
 545       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 546       ;;
 547     *)
 548       enable_liboffloadmic=no
 549       ;;
 550     esac
 551 fi])
 552 AC_SUBST(extra_liboffloadmic_configure_flags)
 553
 554 # Enable libgomp by default on hosted POSIX systems, and a few others.
 555 if test x$enable_libgomp = x ; then
 556     case "${target}" in
 557     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 558         ;;
 559     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 560         ;;
 561     *-*-solaris2* | *-*-hpux11*)
 562         ;;
 563     *-*-darwin* | *-*-aix*)
 564         ;;
 565     nvptx*-*-* | amdgcn*-*-*)
 566         ;;
 567     *)
 568         noconfigdirs="$noconfigdirs target-libgomp"
 569         ;;
 570     esac
 571 fi
 572
 573 # Disable libatomic on unsupported systems.
 574 if test -d ${srcdir}/libatomic; then
 575     if test x$enable_libatomic = x; then
 576         AC_MSG_CHECKING([for libatomic support])
 577         if (srcdir=${srcdir}/libatomic; \
 578                 . ${srcdir}/configure.tgt; \
 579                 test -n "$UNSUPPORTED")
 580         then
 581             AC_MSG_RESULT([no])
 582             noconfigdirs="$noconfigdirs target-libatomic"
 583         else
 584             AC_MSG_RESULT([yes])
 585         fi
 586     fi
 587 fi
 588
 589 # Disable liboffloadmic on unsupported systems.
 590 if test -d ${srcdir}/liboffloadmic; then
 591     if test x$enable_liboffloadmic != xno; then
 592         AC_MSG_CHECKING([for liboffloadmic support])
 593         if (srcdir=${srcdir}/liboffloadmic; \
 594                 . ${srcdir}/configure.tgt; \
 595                 test -n "$UNSUPPORTED")
 596         then
 597             AC_MSG_RESULT([no])
 598             noconfigdirs="$noconfigdirs target-liboffloadmic"
 599         else
 600             AC_MSG_RESULT([yes])
 601         fi
 602     fi
 603 fi
 604
 605 # Disable libitm on unsupported systems.
 606 if test -d ${srcdir}/libitm; then
 607     if test x$enable_libitm = x; then
 608         AC_MSG_CHECKING([for libitm support])
 609         if (srcdir=${srcdir}/libitm; \
 610                 . ${srcdir}/configure.tgt; \
 611                 test -n "$UNSUPPORTED")
 612         then
 613             AC_MSG_RESULT([no])
 614             noconfigdirs="$noconfigdirs target-libitm"
 615         else
 616             AC_MSG_RESULT([yes])
 617         fi
 618     fi
 619 fi
 620
 621 # Disable libsanitizer on unsupported systems.
 622 if test -d ${srcdir}/libsanitizer; then
 623     if test x$enable_libsanitizer = x; then
 624         AC_MSG_CHECKING([for libsanitizer support])
 625         if (srcdir=${srcdir}/libsanitizer; \
 626                 . ${srcdir}/configure.tgt; \
 627                 test -n "$UNSUPPORTED")
 628         then
 629             AC_MSG_RESULT([no])
 630             noconfigdirs="$noconfigdirs target-libsanitizer"
 631         else
 632             AC_MSG_RESULT([yes])
 633         fi
 634     fi
 635 fi
 636
 637 # Disable libvtv on unsupported systems.
 638 if test -d ${srcdir}/libvtv; then
 639     if test x$enable_libvtv = x; then
 640         AC_MSG_CHECKING([for libvtv support])
 641         if (srcdir=${srcdir}/libvtv; \
 642                 . ${srcdir}/configure.tgt; \
 643                 test "$VTV_SUPPORTED" != "yes")
 644         then
 645             AC_MSG_RESULT([no])
 646             noconfigdirs="$noconfigdirs target-libvtv"
 647         else
 648             AC_MSG_RESULT([yes])
 649         fi
 650     fi
 651 fi
 652
 653 # Disable libquadmath for some systems.
 654 case "${target}" in
 655   avr-*-*)
 656     noconfigdirs="$noconfigdirs target-libquadmath"
 657     ;;
 658   # libquadmath is unused on AIX and libquadmath build process use of
 659   # LD_LIBRARY_PATH can break AIX bootstrap.
 660   powerpc-*-aix* | rs6000-*-aix*)
 661     noconfigdirs="$noconfigdirs target-libquadmath"
 662     ;;
 663 esac
 664
 665 # Disable libssp for some systems.
 666 case "${target}" in
 667   avr-*-*)
 668     # No hosted I/O support.
 669     noconfigdirs="$noconfigdirs target-libssp"
 670     ;;
 671   bpf-*-*)
 672     noconfigdirs="$noconfigdirs target-libssp"
 673     ;;
 674   powerpc-*-aix* | rs6000-*-aix*)
 675     noconfigdirs="$noconfigdirs target-libssp"
 676     ;;
 677   pru-*-*)
 678     # No hosted I/O support.
 679     noconfigdirs="$noconfigdirs target-libssp"
 680     ;;
 681   rl78-*-*)
 682     # libssp uses a misaligned load to trigger a fault, but the RL78
 683     # doesn't fault for those - instead, it gives a build-time error
 684     # for explicit misaligned loads.
 685     noconfigdirs="$noconfigdirs target-libssp"
 686     ;;
 687   visium-*-*)
 688     # No hosted I/O support.
 689     noconfigdirs="$noconfigdirs target-libssp"
 690     ;;
 691 esac
 692
 693 # Disable libstdc++-v3 for some systems.
 694 # Allow user to override this if they pass --enable-libstdcxx
 695 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 696   case "${target}" in
 697     *-*-vxworks*)
 698       # VxWorks uses the Dinkumware C++ library.
 699       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 700       ;;
 701     amdgcn*-*-*)
 702       # Not ported/fails to build when using newlib.
 703       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 704       ;;
 705     arm*-wince-pe*)
 706       # the C++ libraries don't build on top of CE's C libraries
 707       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 708       ;;
 709     avr-*-*)
 710       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 711       ;;
 712     bpf-*-*)
 713       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 714       ;;
 715     ft32-*-*)
 716       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 717       ;;
 718   esac
 719 fi
 720
 721 # Disable C++ on systems where it is known to not work.
 722 # For testing, you can override this with --enable-languages=c++.
 723 case ,${enable_languages}, in
 724   *,c++,*)
 725     ;;
 726   *)
 727       case "${target}" in
 728         bpf-*-*)
 729           unsupported_languages="$unsupported_languages c++"
 730           ;;
 731       esac
 732       ;;
 733 esac
 734
 735 # Disable Objc on systems where it is known to not work.
 736 # For testing, you can override this with --enable-languages=objc.
 737 case ,${enable_languages}, in
 738   *,objc,*)
 739     ;;
 740   *)
 741       case "${target}" in
 742         bpf-*-*)
 743           unsupported_languages="$unsupported_languages objc"
 744           ;;
 745       esac
 746       ;;
 747 esac
 748
 749 # Disable D on systems where it is known to not work.
 750 # For testing, you can override this with --enable-languages=d.
 751 case ,${enable_languages}, in
 752   *,d,*)
 753     ;;
 754   *)
 755     case "${target}" in
 756       bpf-*-*)
 757         unsupported_languages="$unsupported_languages d"
 758         ;;
 759     esac
 760     ;;
 761 esac
 762
 763 # Disable libphobos on unsupported systems.
 764 # For testing, you can override this with --enable-libphobos.
 765 if test -d ${srcdir}/libphobos; then
 766     if test x$enable_libphobos = x; then
 767         AC_MSG_CHECKING([for libphobos support])
 768         if (srcdir=${srcdir}/libphobos; \
 769                 . ${srcdir}/configure.tgt; \
 770                 test "$LIBPHOBOS_SUPPORTED" != "yes")
 771         then
 772             AC_MSG_RESULT([no])
 773             noconfigdirs="$noconfigdirs target-libphobos"
 774         else
 775             AC_MSG_RESULT([yes])
 776         fi
 777     fi
 778 fi
 779
 780 # Disable Fortran for some systems.
 781 case "${target}" in
 782   mmix-*-*)
 783     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 784     unsupported_languages="$unsupported_languages fortran"
 785     ;;
 786   bpf-*-*)
 787     unsupported_languages="$unsupported_languages fortran"
 788     ;;
 789 esac
 790
 791 # Disable libffi for some systems.
 792 case "${target}" in
 793   powerpc-*-darwin*)
 794     ;;
 795   i[[3456789]]86-*-darwin*)
 796     ;;
 797   x86_64-*-darwin[[912]]*)
 798     ;;
 799   *-*-darwin*)
 800     noconfigdirs="$noconfigdirs target-libffi"
 801     ;;
 802   *-*-netware*)
 803     noconfigdirs="$noconfigdirs target-libffi"
 804     ;;
 805   *-*-phoenix*)
 806     noconfigdirs="$noconfigdirs target-libffi"
 807     ;;
 808   *-*-rtems*)
 809     noconfigdirs="$noconfigdirs target-libffi"
 810     ;;
 811   *-*-tpf*)
 812     noconfigdirs="$noconfigdirs target-libffi"
 813     ;;
 814   *-*-uclinux*)
 815     noconfigdirs="$noconfigdirs target-libffi"
 816     ;;
 817   *-*-vxworks*)
 818     noconfigdirs="$noconfigdirs target-libffi"
 819     ;;
 820   aarch64*-*-freebsd*)
 821     noconfigdirs="$noconfigdirs target-libffi"
 822     ;;
 823   alpha*-*-*vms*)
 824     noconfigdirs="$noconfigdirs target-libffi"
 825     ;;
 826   arm*-*-freebsd*)
 827     noconfigdirs="$noconfigdirs target-libffi"
 828     ;;
 829   arm-wince-pe)
 830     noconfigdirs="$noconfigdirs target-libffi"
 831     ;;
 832   arm*-*-symbianelf*)
 833     noconfigdirs="$noconfigdirs target-libffi"
 834     ;;
 835   bpf-*-*)
 836     noconfigdirs="$noconfigdirs target-libffi"
 837     ;;
 838   cris-*-* | crisv32-*-*)
 839     case "${target}" in
 840       *-*-linux*)
 841         ;;
 842       *) # See PR46792 regarding target-libffi.
 843         noconfigdirs="$noconfigdirs target-libffi";;
 844     esac
 845     ;;
 846   hppa*64*-*-hpux*)
 847     noconfigdirs="$noconfigdirs target-libffi"
 848     ;;
 849   hppa*-hp-hpux11*)
 850     ;;
 851   hppa*-*-hpux*)
 852     noconfigdirs="$noconfigdirs target-libffi"
 853     ;;
 854   ia64*-*-*vms*)
 855     noconfigdirs="$noconfigdirs target-libffi"
 856     ;;
 857   i[[3456789]]86-w64-mingw*)
 858     noconfigdirs="$noconfigdirs target-libffi"
 859     ;;
 860   i[[3456789]]86-*-mingw*)
 861     noconfigdirs="$noconfigdirs target-libffi"
 862     ;;
 863   x86_64-*-mingw*)
 864     noconfigdirs="$noconfigdirs target-libffi"
 865     ;;
 866   mmix-*-*)
 867     noconfigdirs="$noconfigdirs target-libffi"
 868     ;;
 869   powerpc-*-aix*)
 870     ;;
 871   rs6000-*-aix*)
 872     ;;
 873   ft32-*-*)
 874     noconfigdirs="$noconfigdirs target-libffi"
 875     ;;
 876   *-*-lynxos*)
 877     noconfigdirs="$noconfigdirs target-libffi"
 878     ;;
 879 esac
 880
 881 # Disable the go frontend on systems where it is known to not work. Please keep
 882 # this in sync with contrib/config-list.mk.
 883 case "${target}" in
 884 *-*-darwin* | *-*-cygwin* | *-*-mingw* | bpf-* )
 885     unsupported_languages="$unsupported_languages go"
 886     ;;
 887 esac
 888
 889 # Only allow gdbserver on some systems.
 890 if test -d ${srcdir}/gdbserver; then
 891     if test x$enable_gdbserver = x; then
 892         AC_MSG_CHECKING([for gdbserver support])
 893         if (srcdir=${srcdir}/gdbserver; \
 894                 . ${srcdir}/configure.srv; \
 895                 test -n "$UNSUPPORTED")
 896         then
 897             AC_MSG_RESULT([no])
 898             noconfigdirs="$noconfigdirs gdbserver"
 899         else
 900             AC_MSG_RESULT([yes])
 901         fi
 902     fi
 903 fi
 904
 905 # Disable libgo for some systems where it is known to not work.
 906 # For testing, you can easily override this with --enable-libgo.
 907 if test x$enable_libgo = x; then
 908     case "${target}" in
 909     *-*-darwin*)
 910         # PR 46986
 911         noconfigdirs="$noconfigdirs target-libgo"
 912         ;;
 913     *-*-cygwin* | *-*-mingw*)
 914         noconfigdirs="$noconfigdirs target-libgo"
 915         ;;
 916     bpf-*-*)
 917         noconfigdirs="$noconfigdirs target-libgo"
 918         ;;
 919     esac
 920 fi
 921
 922 # Default libgloss CPU subdirectory.
 923 libgloss_dir="$target_cpu"
 924
 925 case "${target}" in
 926   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 927     libgloss_dir=wince
 928     ;;
 929   aarch64*-*-* )
 930     libgloss_dir=aarch64
 931     ;;
 932   arm*-*-*)
 933     libgloss_dir=arm
 934     ;;
 935   cris-*-* | crisv32-*-*)
 936     libgloss_dir=cris
 937     ;;
 938   hppa*-*-*)
 939     libgloss_dir=pa
 940     ;;
 941   i[[3456789]]86-*-*)
 942     libgloss_dir=i386
 943     ;;
 944   loongarch*-*-*)
 945     libgloss_dir=loongarch
 946     ;;
 947   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 948     libgloss_dir=m68hc11
 949     ;;
 950   m68*-*-* | fido-*-*)
 951     libgloss_dir=m68k
 952     ;;
 953   mips*-*-*)
 954     libgloss_dir=mips
 955     ;;
 956   powerpc*-*-*)
 957     libgloss_dir=rs6000
 958     ;;
 959   pru-*-*)
 960     libgloss_dir=pru
 961     ;;
 962   sparc*-*-*)
 963     libgloss_dir=sparc
 964     ;;
 965 esac
 966
 967 # Disable newlib and libgloss for various target OSes.
 968 case "${target}" in
 969   alpha*-dec-osf*)
 970     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 971     ;;
 972   i[[3456789]]86-*-linux*)
 973     # This section makes it possible to build newlib natively on linux.
 974     # If we are using a cross compiler then don't configure newlib.
 975     if test x${is_cross_compiler} != xno ; then
 976       noconfigdirs="$noconfigdirs target-newlib"
 977     fi
 978     noconfigdirs="$noconfigdirs target-libgloss"
 979     # If we are not using a cross compiler, do configure newlib.
 980     # Note however, that newlib will only be configured in this situation
 981     # if the --with-newlib option has been given, because otherwise
 982     # 'target-newlib' will appear in skipdirs.
 983     ;;
 984   i[[3456789]]86-*-rdos*)
 985     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 986     ;;
 987   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 988     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 989     ;;
 990   sparc-*-sunos4*)
 991     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 992     ;;
 993   bpf-*-*)
 994     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 995     ;;
 996   *-*-aix*)
 997     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 998     ;;
 999   *-*-beos*)
1000     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1001     ;;
1002   *-*-chorusos)
1003     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1004     ;;
1005   *-*-dragonfly*)
1006     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1007     ;;
1008   *-*-freebsd*)
1009     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1010     ;;
1011   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
1012     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1013     ;;
1014   *-*-lynxos*)
1015     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1016     ;;
1017   *-*-mingw*)
1018     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1019     ;;
1020   *-*-netbsd*)
1021     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1022     ;;
1023   *-*-netware*)
1024     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1025     ;;
1026   *-*-tpf*)
1027     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1028     ;;
1029   *-*-uclinux*)
1030     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1031     ;;
1032   *-*-vxworks*)
1033     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1034     ;;
1035 esac
1036
1037 case "${target}" in
1038   *-*-chorusos)
1039     ;;
1040   aarch64-*-darwin*)
1041     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1042     noconfigdirs="$noconfigdirs sim target-rda"
1043     ;;
1044   amdgcn*-*-*)
1045     ;;
1046   arm-*-darwin*)
1047     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1048     noconfigdirs="$noconfigdirs sim target-rda"
1049     ;;
1050   powerpc-*-darwin*)
1051     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1052     noconfigdirs="$noconfigdirs sim target-rda"
1053     ;;
1054   i[[3456789]]86-*-darwin*)
1055     noconfigdirs="$noconfigdirs ld gprof"
1056     noconfigdirs="$noconfigdirs sim target-rda"
1057     ;;
1058   x86_64-*-darwin[[912]]*)
1059     noconfigdirs="$noconfigdirs ld gas gprof"
1060     noconfigdirs="$noconfigdirs sim target-rda"
1061     ;;
1062   *-*-darwin*)
1063     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1064     noconfigdirs="$noconfigdirs sim target-rda"
1065     ;;
1066   *-*-dragonfly*)
1067     ;;
1068   *-*-freebsd*)
1069     if test "x$with_gmp" = x \
1070         && ! test -d ${srcdir}/gmp \
1071         && test -f /usr/local/include/gmp.h; then
1072       with_gmp=/usr/local
1073     fi
1074     ;;
1075   *-*-kaos*)
1076     # Remove unsupported stuff on all kaOS configurations.
1077     noconfigdirs="$noconfigdirs target-libgloss"
1078     ;;
1079   *-*-netbsd*)
1080     ;;
1081   *-*-netware*)
1082     ;;
1083   *-*-phoenix*)
1084     noconfigdirs="$noconfigdirs target-libgloss"
1085     ;;
1086   *-*-rtems*)
1087     noconfigdirs="$noconfigdirs target-libgloss"
1088     ;;
1089     # The tpf target doesn't support gdb yet.
1090   *-*-tpf*)
1091     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
1092     ;;
1093   *-*-uclinux*)
1094     noconfigdirs="$noconfigdirs target-rda"
1095     ;;
1096   *-*-vxworks*)
1097     ;;
1098   alpha*-dec-osf*)
1099     # ld works, but does not support shared libraries.
1100     # gas doesn't generate exception information.
1101     noconfigdirs="$noconfigdirs gas ld"
1102     ;;
1103   alpha*-*-*vms*)
1104     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1105     ;;
1106   alpha*-*-*)
1107     # newlib is not 64 bit ready
1108     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1109     ;;
1110   bpf-*-*)
1111     noconfigdirs="$noconfigdirs target-libobjc target-libbacktrace"
1112     ;;
1113   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1114     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1115     ;;
1116   arc*-*-*)
1117     noconfigdirs="$noconfigdirs sim"
1118     ;;
1119   arm-*-pe*)
1120     noconfigdirs="$noconfigdirs target-libgloss"
1121     ;;
1122   arm-*-riscix*)
1123     noconfigdirs="$noconfigdirs ld target-libgloss"
1124     ;;
1125   avr-*-*)
1126     if test x${with_avrlibc} != xno; then
1127       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1128     fi
1129     ;;
1130   c4x-*-* | tic4x-*-*)
1131     noconfigdirs="$noconfigdirs target-libgloss"
1132     ;;
1133   tic54x-*-*)
1134     noconfigdirs="$noconfigdirs target-libgloss gdb"
1135     ;;
1136   d10v-*-*)
1137     noconfigdirs="$noconfigdirs target-libgloss"
1138     ;;
1139   d30v-*-*)
1140     noconfigdirs="$noconfigdirs gdb"
1141     ;;
1142   fr30-*-elf*)
1143     noconfigdirs="$noconfigdirs gdb"
1144     ;;
1145   ft32-*-*)
1146     noconfigdirs="$noconfigdirs target-rda gprof"
1147     ;;
1148   moxie-*-*)
1149     noconfigdirs="$noconfigdirs"
1150     ;;
1151   h8300*-*-*)
1152     noconfigdirs="$noconfigdirs target-libgloss"
1153     ;;
1154   h8500-*-*)
1155     noconfigdirs="$noconfigdirs target-libgloss"
1156     ;;
1157   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1158     ;;
1159   hppa*64*-*-hpux*)
1160     noconfigdirs="$noconfigdirs gdb"
1161     ;;
1162   hppa*-*-hpux11*)
1163     noconfigdirs="$noconfigdirs gdb ld"
1164     ;;
1165   hppa*64*-*-linux*)
1166     ;;
1167   hppa*-*-linux*)
1168     ;;
1169   hppa*-*-*elf* | \
1170   hppa*-*-lites* | \
1171   hppa*-*-openbsd* | \
1172   hppa*64*-*-*)
1173     ;;
1174   hppa*-*-pro*)
1175     ;;
1176   hppa*-*-*)
1177     noconfigdirs="$noconfigdirs ld"
1178     ;;
1179   i960-*-*)
1180     noconfigdirs="$noconfigdirs gdb"
1181     ;;
1182   ia64*-*-elf*)
1183     # No gdb support yet.
1184     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1185     ;;
1186   ia64*-**-hpux*)
1187     # No ld support yet.
1188     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1189     ;;
1190   ia64*-*-*vms*)
1191     # No ld support yet.
1192     noconfigdirs="$noconfigdirs libgui itcl ld"
1193     ;;
1194   i[[3456789]]86-w64-mingw*)
1195     ;;
1196   i[[3456789]]86-*-mingw*)
1197     target_configdirs="$target_configdirs target-winsup"
1198     ;;
1199   *-*-cygwin*)
1200     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1201     noconfigdirs="$noconfigdirs target-libgloss"
1202     # always build newlib if winsup directory is present.
1203     if test -d "$srcdir/winsup/cygwin"; then
1204       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1205     elif test -d "$srcdir/newlib"; then
1206       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1207     fi
1208     ;;
1209   i[[3456789]]86-*-pe)
1210     noconfigdirs="$noconfigdirs target-libgloss"
1211     ;;
1212   i[[3456789]]86-*-sco3.2v5*)
1213     # The linker does not yet know about weak symbols in COFF,
1214     # and is not configured to handle mixed ELF and COFF.
1215     noconfigdirs="$noconfigdirs ld target-libgloss"
1216     ;;
1217   i[[3456789]]86-*-sco*)
1218     noconfigdirs="$noconfigdirs gprof target-libgloss"
1219     ;;
1220   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1221     noconfigdirs="$noconfigdirs target-libgloss"
1222     ;;
1223   i[[3456789]]86-*-sysv4*)
1224     noconfigdirs="$noconfigdirs target-libgloss"
1225     ;;
1226   i[[3456789]]86-*-beos*)
1227     noconfigdirs="$noconfigdirs gdb"
1228     ;;
1229   i[[3456789]]86-*-rdos*)
1230     noconfigdirs="$noconfigdirs gdb"
1231     ;;
1232   mmix-*-*)
1233     noconfigdirs="$noconfigdirs gdb"
1234     ;;
1235   mt-*-*)
1236     noconfigdirs="$noconfigdirs sim"
1237     ;;
1238   nfp-*-*)
1239     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1240     noconfigdirs="$noconfigdirs $target_libraries"
1241     ;;
1242   pdp11-*-*)
1243     noconfigdirs="$noconfigdirs gdb gprof"
1244     ;;
1245   powerpc-*-aix*)
1246     # copied from rs6000-*-* entry
1247     noconfigdirs="$noconfigdirs gprof"
1248     ;;
1249   powerpc*-*-winnt* | powerpc*-*-pe*)
1250     target_configdirs="$target_configdirs target-winsup"
1251     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1252     # always build newlib.
1253     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1254     ;;
1255     # This is temporary until we can link against shared libraries
1256   powerpcle-*-solaris*)
1257     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1258     ;;
1259   powerpc-*-beos*)
1260     noconfigdirs="$noconfigdirs gdb"
1261     ;;
1262   rs6000-*-lynxos*)
1263     noconfigdirs="$noconfigdirs gprof"
1264     ;;
1265   rs6000-*-aix*)
1266     noconfigdirs="$noconfigdirs gprof"
1267     ;;
1268   rs6000-*-*)
1269     noconfigdirs="$noconfigdirs gprof"
1270     ;;
1271   m68k-apollo-*)
1272     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1273     ;;
1274   microblaze*)
1275     noconfigdirs="$noconfigdirs gprof"
1276     ;;
1277   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1278     if test x$with_newlib = xyes; then
1279       noconfigdirs="$noconfigdirs gprof"
1280     fi
1281     ;;
1282   mips*-*-irix5*)
1283     noconfigdirs="$noconfigdirs gprof target-libgloss"
1284     ;;
1285   mips*-*-irix6*)
1286     noconfigdirs="$noconfigdirs gprof target-libgloss"
1287     ;;
1288   mips*-*-bsd*)
1289     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1290     ;;
1291   mips*-*-linux*)
1292     ;;
1293   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1294   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1295     noconfigdirs="$noconfigdirs ld gas gprof"
1296     ;;
1297   mips*-*-*)
1298     noconfigdirs="$noconfigdirs gprof"
1299     ;;
1300   nvptx*-*-*)
1301     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1302     ;;
1303   sh-*-*)
1304     case "${target}" in
1305       sh*-*-elf)
1306          ;;
1307       *)
1308          noconfigdirs="$noconfigdirs target-libgloss" ;;
1309     esac
1310     ;;
1311   sparc-*-sunos4*)
1312     if test x${is_cross_compiler} = xno ; then
1313            use_gnu_ld=no
1314     fi
1315     ;;
1316   tic6x-*-*)
1317     noconfigdirs="$noconfigdirs sim"
1318     ;;
1319   tilepro*-*-* | tilegx*-*-*)
1320     noconfigdirs="$noconfigdirs sim"
1321     ;;
1322   v810-*-*)
1323     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1324     ;;
1325   vax-*-*)
1326     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1327     ;;
1328   wasm32-*-*)
1329     noconfigdirs="$noconfigdirs ld"
1330     ;;
1331   loongarch*-*-linux*)
1332     ;;
1333   loongarch*-*-*)
1334     noconfigdirs="$noconfigdirs gprof"
1335     ;;
1336 esac
1337
1338 # If we aren't building newlib, then don't build libgloss, since libgloss
1339 # depends upon some newlib header files.
1340 case "${noconfigdirs}" in
1341   *target-libgloss*) ;;
1342   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1343 esac
1344
1345 # Work in distributions that contain no compiler tools, like Autoconf.
1346 host_makefile_frag=/dev/null
1347 if test -d ${srcdir}/config ; then
1348 case "${host}" in
1349   i[[3456789]]86-*-msdosdjgpp*)
1350     host_makefile_frag="config/mh-djgpp"
1351     ;;
1352   *-cygwin*)
1353     ACX_CHECK_CYGWIN_CAT_WORKS
1354     host_makefile_frag="config/mh-cygwin"
1355     ;;
1356   *-mingw*)
1357     host_makefile_frag="config/mh-mingw"
1358     ;;
1359   alpha*-linux*)
1360     host_makefile_frag="config/mh-alpha-linux"
1361     ;;
1362   hppa*-hp-hpux10*)
1363     host_makefile_frag="config/mh-pa-hpux10"
1364     ;;
1365   hppa*-hp-hpux*)
1366     host_makefile_frag="config/mh-pa"
1367     ;;
1368   hppa*-*)
1369     host_makefile_frag="config/mh-pa"
1370     ;;
1371   i?86-*-darwin[[89]]* | i?86-*-darwin1[[0-7]]* | powerpc*-*-darwin*)
1372     host_makefile_frag="config/mh-darwin"
1373     ;;
1374   powerpc-*-aix*)
1375     host_makefile_frag="config/mh-ppc-aix"
1376     ;;
1377   rs6000-*-aix*)
1378     host_makefile_frag="config/mh-ppc-aix"
1379     ;;
1380 esac
1381 fi
1382
1383 if test "${build}" != "${host}" ; then
1384   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1385   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1386   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1387   CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CC_FOR_BUILD) -E}"
1388   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1389   DSYMUTIL_FOR_BUILD=${DSYMUTIL_FOR_BUILD-dsymutil}
1390   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1391   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1392   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1393   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1394   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1395   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1396   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1397   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1398   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1399 else
1400   AR_FOR_BUILD="\$(AR)"
1401   AS_FOR_BUILD="\$(AS)"
1402   CC_FOR_BUILD="\$(CC)"
1403   CXX_FOR_BUILD="\$(CXX)"
1404   DSYMUTIL_FOR_BUILD="\$(DSYMUTIL)"
1405   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1406   GOC_FOR_BUILD="\$(GOC)"
1407   GDC_FOR_BUILD="\$(GDC)"
1408   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1409   LD_FOR_BUILD="\$(LD)"
1410   NM_FOR_BUILD="\$(NM)"
1411   RANLIB_FOR_BUILD="\$(RANLIB)"
1412   WINDRES_FOR_BUILD="\$(WINDRES)"
1413   WINDMC_FOR_BUILD="\$(WINDMC)"
1414 fi
1415
1416 AC_PROG_CC_C99
1417 AC_PROG_CXX
1418
1419 # We must set the default linker to the linker used by gcc for the correct
1420 # operation of libtool.  If LD is not defined and we are using gcc, try to
1421 # set the LD default to the ld used by gcc.
1422 if test -z "$LD"; then
1423   if test "$GCC" = yes; then
1424     case $build in
1425     *-*-mingw*)
1426       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1427     *)
1428       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1429     esac
1430     case $gcc_prog_ld in
1431     # Accept absolute paths.
1432     [[\\/]* | [A-Za-z]:[\\/]*)]
1433       LD="$gcc_prog_ld" ;;
1434     esac
1435   fi
1436 fi
1437
1438 # Check whether -static-libstdc++ -static-libgcc is supported.
1439 have_static_libs=no
1440 if test "$GCC" = yes; then
1441   saved_LDFLAGS="$LDFLAGS"
1442
1443   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1444   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1445   AC_LANG_PUSH(C++)
1446   AC_LINK_IFELSE([AC_LANG_SOURCE([
1447 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1448 #error -static-libstdc++ not implemented
1449 #endif
1450 int main() {}])],
1451     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1452     [AC_MSG_RESULT([no])])
1453   AC_LANG_POP(C++)
1454
1455   LDFLAGS="$saved_LDFLAGS"
1456 fi
1457
1458 ACX_PROG_GNAT
1459 ACX_PROG_GDC
1460 ACX_PROG_CMP_IGNORE_INITIAL
1461
1462 AC_ARG_ENABLE([bootstrap],
1463 [AS_HELP_STRING([--enable-bootstrap],
1464                 [enable bootstrapping @<:@yes if native build@:>@])],,
1465 enable_bootstrap=default)
1466
1467 # Issue errors and warnings for invalid/strange bootstrap combinations.
1468 if test -r $srcdir/gcc/configure; then
1469   have_compiler=yes
1470 else
1471   have_compiler=no
1472 fi
1473
1474 case "$have_compiler:$host:$target:$enable_bootstrap" in
1475   *:*:*:no) ;;
1476
1477   # Default behavior.  Enable bootstrap if we have a compiler
1478   # and we are in a native configuration.
1479   yes:$build:$build:default)
1480     enable_bootstrap=yes ;;
1481
1482   *:*:*:default)
1483     enable_bootstrap=no ;;
1484
1485   # We have a compiler and we are in a native configuration, bootstrap is ok
1486   yes:$build:$build:yes)
1487     ;;
1488
1489   # Other configurations, but we have a compiler.  Assume the user knows
1490   # what he's doing.
1491   yes:*:*:yes)
1492     AC_MSG_WARN([trying to bootstrap a cross compiler])
1493     ;;
1494
1495   # No compiler: if they passed --enable-bootstrap explicitly, fail
1496   no:*:*:yes)
1497     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1498
1499   # Fail if wrong command line
1500   *)
1501     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1502     ;;
1503 esac
1504
1505 # When bootstrapping with GCC, build stage 1 in C++11 mode to ensure that a
1506 # C++11 compiler can still start the bootstrap.  Otherwise, if building GCC,
1507 # require C++11 (or higher).
1508 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1509   CXX="$CXX -std=c++11"
1510 elif test "$have_compiler" = yes; then
1511   AX_CXX_COMPILE_STDCXX(11)
1512
1513   if test "${build}" != "${host}"; then
1514     AX_CXX_COMPILE_STDCXX(11, [], [], [_FOR_BUILD])
1515   fi
1516 fi
1517
1518 AC_ARG_ENABLE([pgo-build],
1519 [AS_HELP_STRING([--enable-pgo-build[[=lto]]],
1520                 [enable the PGO build])],
1521 [enable_pgo_build=$enableval],
1522 [enable_pgo_build=no])
1523
1524 # Issue errors and warnings for invalid/strange PGO build combinations.
1525 case "$have_compiler:$host:$target:$enable_pgo_build" in
1526   *:*:*:no) ;;
1527
1528   # Allow the PGO build only if we aren't building a compiler and
1529   # we are in a native configuration.
1530   no:$build:$build:yes | no:$build:$build:lto) ;;
1531
1532   # Disallow the PGO bootstrap if we are building a compiler.
1533   yes:*:*:yes | yes:*:*:lto)
1534     AC_MSG_ERROR([cannot perform the PGO bootstrap when building a compiler]) ;;
1535
1536   *)
1537     AC_MSG_ERROR([invalid option for --enable-pgo-build])
1538     ;;
1539 esac
1540
1541 if test "$enable_pgo_build" != "no"; then
1542   AC_MSG_CHECKING([whether the compiler supports -fprofile-generate])
1543   old_CFLAGS="$CFLAGS"
1544   PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
1545   CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
1546   AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1547                     [PGO_BUILD_GEN_CFLAGS=])
1548   CFLAGS="$old_CFLAGS"
1549   if test -n "$PGO_BUILD_GEN_CFLAGS"; then
1550     AC_MSG_RESULT([yes])
1551     PGO_BUILD_USE_CFLAGS="-fprofile-use"
1552   else
1553     AC_MSG_RESULT([no])
1554     AC_MSG_ERROR([cannot perform the PGO build without -fprofile-generate])
1555   fi
1556
1557   if test "$enable_pgo_build" = "lto"; then
1558     AC_MSG_CHECKING([whether the compiler supports -flto=jobserver -ffat-lto-objects])
1559     old_CFLAGS="$CFLAGS"
1560     PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
1561     CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
1562     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1563                       [PGO_BUILD_LTO_CFLAGS=])
1564     CFLAGS="$old_CFLAGS"
1565     if test -n "$PGO_BUILD_LTO_CFLAGS"; then
1566       AC_MSG_RESULT([yes])
1567     else
1568       AC_MSG_RESULT([no])
1569       AC_MSG_WARN([LTO is disabled for the PGO build])
1570     fi
1571   fi
1572 fi
1573 AC_SUBST(PGO_BUILD_GEN_CFLAGS)
1574 AC_SUBST(PGO_BUILD_USE_CFLAGS)
1575 AC_SUBST(PGO_BUILD_LTO_CFLAGS)
1576
1577 # Used for setting $lt_cv_objdir
1578 _LT_CHECK_OBJDIR
1579
1580 # Check for GMP, MPFR and MPC
1581 require_gmp=no
1582 require_mpc=no
1583 if test -d ${srcdir}/gcc ; then
1584   require_gmp=yes
1585   require_mpc=yes
1586 fi
1587 if test -d ${srcdir}/gdb ; then
1588   if test "x$enable_gdb" != xno; then
1589    require_gmp=yes
1590   fi
1591 fi
1592
1593 gmplibs="-lmpfr -lgmp"
1594 if test x"$require_mpc" = "xyes" ; then
1595   gmplibs="-lmpc $gmplibs"
1596 fi
1597 gmpinc=
1598 have_gmp=no
1599
1600 # Specify a location for mpc
1601 # check for this first so it ends up on the link line before mpfr.
1602 AC_ARG_WITH(mpc,
1603 [AS_HELP_STRING([--with-mpc=PATH],
1604                 [specify prefix directory for installed MPC package.
1605                  Equivalent to --with-mpc-include=PATH/include
1606                  plus --with-mpc-lib=PATH/lib])])
1607 AC_ARG_WITH(mpc-include,
1608 [AS_HELP_STRING([--with-mpc-include=PATH],
1609                 [specify directory for installed MPC include files])])
1610 AC_ARG_WITH(mpc-lib,
1611 [AS_HELP_STRING([--with-mpc-lib=PATH],
1612                 [specify directory for the installed MPC library])])
1613
1614 if test "x$with_mpc" != x; then
1615   gmplibs="-L$with_mpc/lib $gmplibs"
1616   gmpinc="-I$with_mpc/include $gmpinc"
1617 fi
1618 if test "x$with_mpc_include" != x; then
1619   gmpinc="-I$with_mpc_include $gmpinc"
1620 fi
1621 if test "x$with_mpc_lib" != x; then
1622   gmplibs="-L$with_mpc_lib $gmplibs"
1623 fi
1624 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1625   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1626   gmpinc='-I$$s/mpc/src '"$gmpinc"
1627   # Do not test the mpc version.  Assume that it is sufficient, since
1628   # it is in the source tree, and the library has not been built yet
1629   # but it would be included on the link line in the version check below
1630   # hence making the test fail.
1631   have_gmp=yes
1632 fi
1633
1634 # Specify a location for mpfr
1635 # check for this first so it ends up on the link line before gmp.
1636 AC_ARG_WITH(mpfr,
1637 [AS_HELP_STRING([--with-mpfr=PATH],
1638                 [specify prefix directory for installed MPFR package.
1639                  Equivalent to --with-mpfr-include=PATH/include
1640                  plus --with-mpfr-lib=PATH/lib])])
1641 AC_ARG_WITH(mpfr-include,
1642 [AS_HELP_STRING([--with-mpfr-include=PATH],
1643                 [specify directory for installed MPFR include files])])
1644 AC_ARG_WITH(mpfr-lib,
1645 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1646                 [specify directory for the installed MPFR library])])
1647
1648 if test "x$with_mpfr" != x; then
1649   gmplibs="-L$with_mpfr/lib $gmplibs"
1650   gmpinc="-I$with_mpfr/include $gmpinc"
1651 fi
1652 if test "x$with_mpfr_include" != x; then
1653   gmpinc="-I$with_mpfr_include $gmpinc"
1654 fi
1655 if test "x$with_mpfr_lib" != x; then
1656   gmplibs="-L$with_mpfr_lib $gmplibs"
1657 fi
1658 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1659   # MPFR v3.1.0 moved the sources into a src sub-directory.
1660   if ! test -d ${srcdir}/mpfr/src; then
1661     AC_MSG_ERROR([dnl
1662 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1663   fi
1664   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1665   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1666   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1667   # Do not test the mpfr version.  Assume that it is sufficient, since
1668   # it is in the source tree, and the library has not been built yet
1669   # but it would be included on the link line in the version check below
1670   # hence making the test fail.
1671   have_gmp=yes
1672 fi
1673
1674 # Specify a location for gmp
1675 AC_ARG_WITH(gmp,
1676 [AS_HELP_STRING([--with-gmp=PATH],
1677                 [specify prefix directory for the installed GMP package.
1678                  Equivalent to --with-gmp-include=PATH/include
1679                  plus --with-gmp-lib=PATH/lib])])
1680 AC_ARG_WITH(gmp-include,
1681 [AS_HELP_STRING([--with-gmp-include=PATH],
1682                 [specify directory for installed GMP include files])])
1683 AC_ARG_WITH(gmp-lib,
1684 [AS_HELP_STRING([--with-gmp-lib=PATH],
1685                 [specify directory for the installed GMP library])])
1686
1687
1688 if test "x$with_gmp" != x; then
1689   gmplibs="-L$with_gmp/lib $gmplibs"
1690   gmpinc="-I$with_gmp/include $gmpinc"
1691 fi
1692 if test "x$with_gmp_include" != x; then
1693   gmpinc="-I$with_gmp_include $gmpinc"
1694 fi
1695 if test "x$with_gmp_lib" != x; then
1696   gmplibs="-L$with_gmp_lib $gmplibs"
1697 fi
1698 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1699   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1700   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1701   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1702   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1703   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1704   # Do not test the gmp version.  Assume that it is sufficient, since
1705   # it is in the source tree, and the library has not been built yet
1706   # but it would be included on the link line in the version check below
1707   # hence making the test fail.
1708   have_gmp=yes
1709 fi
1710
1711 if test "x$require_gmp" = xyes && test "x$have_gmp" = xno; then
1712   have_gmp=yes
1713   saved_CFLAGS="$CFLAGS"
1714   CFLAGS="$CFLAGS $gmpinc"
1715   # Check for the recommended and required versions of GMP.
1716   AC_MSG_CHECKING([for the correct version of gmp.h])
1717   AC_TRY_COMPILE([#include "gmp.h"],[
1718   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1719   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1720   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1721   choke me
1722   #endif
1723   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1724   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1725   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1726   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1727   choke me
1728   #endif
1729   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1730    [AC_MSG_RESULT([no]); have_gmp=no])
1731
1732   # If we have GMP, check the MPFR version.
1733   if test x"$have_gmp" = xyes; then
1734     # Check for the recommended and required versions of MPFR.
1735     AC_MSG_CHECKING([for the correct version of mpfr.h])
1736     AC_TRY_COMPILE([#include <gmp.h>
1737     #include <mpfr.h>],[
1738     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,0)
1739     choke me
1740     #endif
1741     ], [AC_TRY_COMPILE([#include <gmp.h>
1742     #include <mpfr.h>],[
1743     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,6)
1744     choke me
1745     #endif
1746     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1747      [AC_MSG_RESULT([no]); have_gmp=no])
1748   fi
1749
1750   # Check for the MPC header version.
1751   if test "x$require_mpc" = xyes && test x"$have_gmp" = xyes ; then
1752     # Check for the recommended and required versions of MPC.
1753     AC_MSG_CHECKING([for the correct version of mpc.h])
1754     AC_TRY_COMPILE([#include <mpc.h>],[
1755     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1756     choke me
1757     #endif
1758     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1759     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1760     choke me
1761     #endif
1762     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1763      [AC_MSG_RESULT([no]); have_gmp=no])
1764   fi
1765
1766   # Now check the MPFR library.
1767   if test x"$have_gmp" = xyes; then
1768     saved_LIBS="$LIBS"
1769     LIBS="$LIBS $gmplibs"
1770     AC_MSG_CHECKING([for the correct version of the gmp/mpfr libraries])
1771     AC_TRY_LINK([#include <mpfr.h>],[
1772     mpfr_t n;
1773     mpfr_t x;
1774     int t;
1775     mpfr_init (n);
1776     mpfr_init (x);
1777     mpfr_atan2 (n, n, x, MPFR_RNDN);
1778     mpfr_erfc (n, x, MPFR_RNDN);
1779     mpfr_subnormalize (x, t, MPFR_RNDN);
1780     mpfr_clear(n);
1781     mpfr_clear(x);
1782     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1783     LIBS="$saved_LIBS"
1784   fi
1785
1786   # Now check the MPC library
1787   if test "x$require_mpc" = xyes && test x"$have_gmp" = xyes; then
1788     saved_LIBS="$LIBS"
1789     LIBS="$LIBS $gmplibs"
1790     AC_MSG_CHECKING([for the correct version of the mpc libraries])
1791     AC_TRY_LINK([#include <mpc.h>],[
1792     mpc_t c;
1793     mpc_init2 (c, 53);
1794     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1795     mpc_cosh (c, c, MPC_RNDNN);
1796     mpc_pow (c, c, c, MPC_RNDNN);
1797     mpc_acosh (c, c, MPC_RNDNN);
1798     mpc_clear (c);
1799     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1800     LIBS="$saved_LIBS"
1801   fi
1802
1803   CFLAGS="$saved_CFLAGS"
1804
1805 # The library versions listed in the error message below should match
1806 # the HARD-minimums enforced above.
1807   if test x$have_gmp != xyes; then
1808     if test -d ${srcdir}/gcc ; then
1809       AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 3.1.0+ and MPC 0.8.0+.
1810 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1811 their locations.  Source code for these libraries can be found at
1812 their respective hosting sites as well as at
1813 https://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1814 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1815 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1816 make sure that you have installed both the libraries and the header
1817 files.  They may be located in separate packages.])
1818     else
1819       AC_MSG_ERROR([Building GDB requires GMP 4.2+, and MPFR 3.1.0+.
1820 Try the --with-gmp and/or --with-mpfr options to specify
1821 their locations.  If you obtained GMP and/or MPFR from a vendor
1822 distribution package, make sure that you have installed both the libraries
1823 and the header files.  They may be located in separate packages.])
1824     fi
1825   fi
1826 fi
1827
1828 # Flags needed for both GMP, MPFR and/or MPC.
1829 AC_SUBST(gmplibs)
1830 AC_SUBST(gmpinc)
1831 AC_SUBST(extra_mpfr_configure_flags)
1832 AC_SUBST(extra_mpc_gmp_configure_flags)
1833 AC_SUBST(extra_mpc_mpfr_configure_flags)
1834 AC_SUBST(extra_isl_gmp_configure_flags)
1835
1836 # Libraries to use for stage1 or when not bootstrapping.
1837 AC_ARG_WITH(stage1-libs,
1838 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1839 [if test "$withval" = "no" -o "$withval" = "yes"; then
1840    stage1_libs=
1841  else
1842    stage1_libs=$withval
1843  fi],
1844 [stage1_libs=])
1845 AC_SUBST(stage1_libs)
1846
1847 # Whether or not to use -static-libstdc++ and -static-libgcc.  The
1848 # default is yes if gcc is being built; no otherwise.  The reason for
1849 # this default is that gdb is sometimes linked against GNU Source
1850 # Highlight, which is a shared library that uses C++ exceptions.  In
1851 # this case, -static-libstdc++ will cause crashes.
1852 AC_ARG_WITH(static-standard-libraries,
1853 [AS_HELP_STRING([--with-static-standard-libraries],
1854                 [use -static-libstdc++ and -static-libgcc (default=auto)])],
1855 [], [with_static_standard_libraries=auto])
1856 if test "$with_static_standard_libraries" = auto; then
1857   with_static_standard_libraries=$have_compiler
1858 fi
1859
1860 # Linker flags to use for stage1 or when not bootstrapping.
1861 AC_ARG_WITH(stage1-ldflags,
1862 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1863 [if test "$withval" = "no" -o "$withval" = "yes"; then
1864    stage1_ldflags=
1865  else
1866    stage1_ldflags=$withval
1867  fi],
1868 [stage1_ldflags=
1869  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1870  # if supported.  But if the user explicitly specified the libraries to use,
1871  # trust that they are doing what they want.
1872  if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
1873      -a "$have_static_libs" = yes; then
1874    stage1_ldflags="-static-libstdc++ -static-libgcc"
1875  fi])
1876 AC_SUBST(stage1_ldflags)
1877
1878 # Libraries to use for stage2 and later builds.
1879 AC_ARG_WITH(boot-libs,
1880 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1881 [if test "$withval" = "no" -o "$withval" = "yes"; then
1882    poststage1_libs=
1883  else
1884    poststage1_libs=$withval
1885  fi],
1886 [poststage1_libs=])
1887 AC_SUBST(poststage1_libs)
1888
1889 # Linker flags to use for stage2 and later builds.
1890 AC_ARG_WITH(boot-ldflags,
1891 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1892                 [linker flags for stage2 and later])],
1893 [if test "$withval" = "no" -o "$withval" = "yes"; then
1894    poststage1_ldflags=
1895  else
1896    poststage1_ldflags=$withval
1897  fi],
1898 [poststage1_ldflags=
1899  # In stages 2 and 3, default to linking libstdc++ and libgcc
1900  # statically.  But if the user explicitly specified the libraries to
1901  # use, trust that they are doing what they want.
1902  if test "$poststage1_libs" = ""; then
1903    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1904  fi])
1905 AC_SUBST(poststage1_ldflags)
1906
1907 # GCC GRAPHITE dependency isl.
1908 # Basic setup is inlined here, actual checks are in config/isl.m4
1909
1910 AC_ARG_WITH(isl,
1911   [AS_HELP_STRING(
1912    [--with-isl=PATH],
1913    [Specify prefix directory for the installed isl package.
1914     Equivalent to --with-isl-include=PATH/include
1915     plus --with-isl-lib=PATH/lib])])
1916
1917 # Treat --without-isl as a request to disable
1918 # GRAPHITE support and skip all following checks.
1919 if test "x$with_isl" != "xno"; then
1920   # Check for isl
1921   dnl Provide configure switches and initialize islinc & isllibs
1922   dnl with user input.
1923   ISL_INIT_FLAGS
1924   dnl The versions of isl that work for Graphite
1925   ISL_CHECK_VERSION()
1926   dnl Only execute fail-action, if isl has been requested.
1927   ISL_IF_FAILED([
1928     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1929 fi
1930
1931 # If the isl check failed, disable builds of in-tree variant of isl
1932 if test "x$with_isl" = xno ||
1933    test "x$gcc_cv_isl" = xno; then
1934   noconfigdirs="$noconfigdirs isl"
1935   islinc=
1936 fi
1937
1938 AC_SUBST(isllibs)
1939 AC_SUBST(islinc)
1940
1941 # Check for LTO support.
1942 AC_ARG_ENABLE(lto,
1943 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1944 enable_lto=$enableval,
1945 enable_lto=yes; default_enable_lto=yes)
1946
1947 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1948   build_lto_plugin=yes
1949 ],[if test x"$default_enable_lto" = x"yes" ; then
1950     case $target in
1951       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1952       # On other non-ELF platforms, LTO has yet to be validated.
1953       *) enable_lto=no ;;
1954     esac
1955   else
1956   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1957   # It would also be nice to check the binutils support, but we don't
1958   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1959   # warn during gcc/ subconfigure; unless you're bootstrapping with
1960   # -flto it won't be needed until after installation anyway.
1961     case $target in
1962       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1963       *) if test x"$enable_lto" = x"yes"; then
1964         AC_MSG_ERROR([LTO support is not enabled for this target.])
1965         fi
1966       ;;
1967     esac
1968   fi
1969   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1970   # Build it unless LTO was explicitly disabled.
1971   case $target in
1972     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1973     *) ;;
1974   esac
1975 ])
1976
1977 AC_ARG_ENABLE(linker-plugin-configure-flags,
1978   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1979     [additional flags for configuring linker plugins @<:@none@:>@])],
1980   extra_linker_plugin_configure_flags=$enableval,
1981   extra_linker_plugin_configure_flags=)
1982 AC_SUBST(extra_linker_plugin_configure_flags)
1983 AC_ARG_ENABLE(linker-plugin-flags,
1984   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1985     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1986   extra_linker_plugin_flags=$enableval,
1987   extra_linker_plugin_flags=)
1988 AC_SUBST(extra_linker_plugin_flags)
1989
1990 # Enable --enable-host-shared.
1991 # Checked early to determine whether jit is an 'all' language
1992 AC_ARG_ENABLE(host-shared,
1993 [AS_HELP_STRING([--enable-host-shared],
1994                 [build host code as shared libraries])],
1995 [host_shared=$enableval
1996  case $host in
1997    x86_64-*-darwin* | aarch64-*-darwin*)
1998      if test x$host_shared != xyes ; then
1999        # PIC is the default, and actually cannot be switched off.
2000        echo configure.ac: warning: PIC code is required for the configured target, host-shared setting ignored. 1>&2
2001        host_shared=yes
2002      fi ;;
2003   *) ;;
2004  esac],
2005 [case $host in
2006   x86_64-*-darwin* | aarch64-*-darwin*) host_shared=yes ;;
2007   *) host_shared=no ;;
2008  esac])
2009
2010 AC_SUBST(host_shared)
2011
2012 # If we are building PIC/PIE host executables, and we are building dependent
2013 # libs (e.g. GMP) in-tree those libs need to be configured to generate PIC
2014 # code.
2015 host_libs_picflag=
2016 if test "$host_shared" = "yes";then
2017 host_libs_picflag='--with-pic'
2018 fi
2019 AC_SUBST(host_libs_picflag)
2020
2021 # By default, C and C++ are the only stage 1 languages.
2022 stage1_languages=,c,
2023
2024 # Target libraries that we bootstrap.
2025 bootstrap_target_libs=,target-libgcc,
2026
2027 # Figure out what language subdirectories are present.
2028 # Look if the user specified --enable-languages="..."; if not, use
2029 # the environment variable $LANGUAGES if defined. $LANGUAGES might
2030 # go away some day.
2031 # NB:  embedded tabs in this IF block -- do not untabify
2032 if test -d ${srcdir}/gcc; then
2033   if test x"${enable_languages+set}" != xset; then
2034     if test x"${LANGUAGES+set}" = xset; then
2035       enable_languages="${LANGUAGES}"
2036         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
2037     else
2038       enable_languages=default
2039     fi
2040   else
2041     if test x"${enable_languages}" = x ||
2042        test x"${enable_languages}" = xyes;
2043        then
2044       echo configure.ac: --enable-languages needs at least one language argument 1>&2
2045       exit 1
2046     fi
2047   fi
2048   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
2049
2050   # 'f95' is the old name for the 'fortran' language. We issue a warning
2051   # and make the substitution.
2052   case ,${enable_languages}, in
2053     *,f95,*)
2054       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
2055       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
2056       ;;
2057   esac
2058
2059   # If bootstrapping, C++ must be enabled.
2060   case ",$enable_languages,:$enable_bootstrap" in
2061     *,c++,*:*) ;;
2062     *:yes)
2063       if test -f ${srcdir}/gcc/cp/config-lang.in; then
2064         enable_languages="${enable_languages},c++"
2065       else
2066         AC_MSG_ERROR([bootstrapping requires c++ sources])
2067       fi
2068       ;;
2069   esac
2070
2071   # First scan to see if an enabled language requires some other language.
2072   # We assume that a given config-lang.in will list all the language
2073   # front ends it requires, even if some are required indirectly.
2074   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2075     case ${lang_frag} in
2076       ..) ;;
2077       # The odd quoting in the next line works around
2078       # an apparent bug in bash 1.12 on linux.
2079       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2080       *)
2081         # From the config-lang.in, get $language, $lang_requires, and
2082         # $lang_requires_boot_languages.
2083         language=
2084         lang_requires=
2085         lang_requires_boot_languages=
2086         # set srcdir during sourcing lang_frag to the gcc dir.
2087         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
2088         # polutes this shell
2089         saved_srcdir=${srcdir}
2090         srcdir=${srcdir}/gcc . ${lang_frag}
2091         srcdir=${saved_srcdir}
2092         for other in ${lang_requires} ${lang_requires_boot_languages}; do
2093           case ,${enable_languages}, in
2094             *,$other,*) ;;
2095             *,default,*) ;;
2096             *,all,*) ;;
2097             *,$language,*)
2098               echo " \`$other' language required by \`$language'; enabling" 1>&2
2099               enable_languages="${enable_languages},${other}"
2100               ;;
2101           esac
2102         done
2103         for other in ${lang_requires_boot_languages} ; do
2104           if test "$other" != "c"; then
2105             case ,${enable_stage1_languages}, in
2106               *,$other,*) ;;
2107               *,default,*) ;;
2108               *,all,*) ;;
2109               *)
2110                 case ,${enable_languages}, in
2111                   *,$language,*)
2112                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
2113                     enable_stage1_languages="$enable_stage1_languages,${other}"
2114                     ;;
2115                 esac
2116                 ;;
2117             esac
2118           fi
2119         done
2120         ;;
2121     esac
2122   done
2123
2124   new_enable_languages=,c,
2125
2126   # If LTO is enabled, add the LTO front end.
2127   if test "$enable_lto" = "yes" ; then
2128     case ,${enable_languages}, in
2129       *,lto,*) ;;
2130       *) enable_languages="${enable_languages},lto" ;;
2131     esac
2132     if test "${build_lto_plugin}" = "yes" ; then
2133       configdirs="$configdirs lto-plugin"
2134     fi
2135   fi
2136
2137   # If we're building an offloading compiler, add the LTO front end.
2138   if test x"$enable_as_accelerator_for" != x ; then
2139     case ,${enable_languages}, in
2140       *,lto,*) ;;
2141       *) enable_languages="${enable_languages},lto" ;;
2142     esac
2143   fi
2144
2145   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
2146   potential_languages=,c,
2147
2148   enabled_target_libs=
2149   disabled_target_libs=
2150
2151   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2152     case ${lang_frag} in
2153       ..) ;;
2154       # The odd quoting in the next line works around
2155       # an apparent bug in bash 1.12 on linux.
2156       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2157       *)
2158         # From the config-lang.in, get $language, $target_libs,
2159         # $lang_dirs, $boot_language, and $build_by_default
2160         language=
2161         target_libs=
2162         lang_dirs=
2163         subdir_requires=
2164         boot_language=no
2165         build_by_default=yes
2166         # set srcdir during sourcing.  See above about save & restore
2167         saved_srcdir=${srcdir}
2168         srcdir=${srcdir}/gcc . ${lang_frag}
2169         srcdir=${saved_srcdir}
2170         if test x${language} = x; then
2171           echo "${lang_frag} doesn't set \$language." 1>&2
2172           exit 1
2173         fi
2174
2175         if test "$language" = "c++"; then
2176           boot_language=yes
2177         fi
2178
2179         add_this_lang=no
2180         # C is always enabled, so no need to add it again
2181         if test "$language" != "c"; then
2182           case ,${enable_languages}, in
2183             *,${language},*)
2184               # Language was explicitly selected; include it
2185               add_this_lang=yes
2186               ;;
2187             *,all,*)
2188               # All languages are enabled
2189               add_this_lang=all
2190               ;;
2191             *,default,*)
2192               # 'default' was selected, select it if it is a default language
2193               add_this_lang=${build_by_default}
2194               ;;
2195           esac
2196         fi
2197
2198         # Disable languages that need other directories if these aren't available.
2199         for i in $subdir_requires; do
2200           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2201           case ${add_this_lang} in
2202             yes)
2203               # Specifically requested language; tell them.
2204               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2205               ;;
2206             all)
2207               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2208               add_this_lang=unsupported
2209               ;;
2210             *)
2211               # Silently disable.
2212               add_this_lang=unsupported
2213               ;;
2214           esac
2215         done
2216
2217         # Disable Ada if no preexisting GNAT is available.
2218         case ${add_this_lang}:${language}:${have_gnat} in
2219           yes:ada:no)
2220             # Specifically requested language; tell them.
2221             AC_MSG_ERROR([GNAT is required to build $language])
2222             ;;
2223           all:ada:no)
2224             AC_MSG_WARN([GNAT is required to build $language])
2225             add_this_lang=unsupported
2226             ;;
2227           *:ada:no)
2228             # Silently disable.
2229             add_this_lang=unsupported
2230             ;;
2231         esac
2232
2233         # Disable D if no preexisting GDC is available.
2234         case ${add_this_lang}:${language}:${have_gdc} in
2235           yes:d:no)
2236             # Specifically requested language; tell them.
2237             AC_MSG_ERROR([GDC is required to build $language])
2238            ;;
2239           all:d:no)
2240             AC_MSG_WARN([GDC is required to build $language])
2241             add_this_lang=unsupported
2242             ;;
2243           *:d:no)
2244             # Silently disable.
2245             add_this_lang=unsupported
2246             ;;
2247         esac
2248
2249         # Disable jit if -enable-host-shared not specified
2250         # but not if building for Mingw. All code in Windows
2251         # is position independent code (PIC).
2252         case $target in
2253           *mingw*) ;;
2254           *)
2255           case ${add_this_lang}:${language}:${host_shared} in
2256             yes:jit:no)
2257                    # PR jit/64780: explicitly specify --enable-host-shared
2258             AC_MSG_ERROR([
2259 Enabling language "jit" requires --enable-host-shared.
2260
2261 --enable-host-shared typically slows the rest of the compiler down by
2262 a few %, so you must explicitly enable it.
2263
2264 If you want to build both the jit and the regular compiler, it is often
2265 best to do this via two separate configure/builds, in separate
2266 directories, to avoid imposing the performance cost of
2267 --enable-host-shared on the regular compiler.])
2268                     ;;
2269             all:jit:no)
2270               AC_MSG_WARN([--enable-host-shared required to build $language])
2271               add_this_lang=unsupported
2272               ;;
2273             *:jit:no)
2274               # Silently disable.
2275               add_this_lang=unsupported
2276               ;;
2277                 esac
2278           ;;
2279         esac
2280
2281         # Disable a language that is unsupported by the target.
2282         case "${add_this_lang}: $unsupported_languages " in
2283           no:*) ;;
2284           unsupported:*) ;;
2285           *:*" $language "*)
2286             AC_MSG_WARN([${language} not supported for this target])
2287             add_this_lang=unsupported
2288             ;;
2289         esac
2290
2291         case $add_this_lang in
2292           unsupported)
2293             # Remove language-dependent dirs.
2294             disabled_target_libs="$disabled_target_libs $target_libs"
2295             noconfigdirs="$noconfigdirs $lang_dirs"
2296             ;;
2297           no)
2298             # Remove language-dependent dirs; still show language as supported.
2299             disabled_target_libs="$disabled_target_libs $target_libs"
2300             noconfigdirs="$noconfigdirs $lang_dirs"
2301             potential_languages="${potential_languages}${language},"
2302             ;;
2303           all|yes)
2304             new_enable_languages="${new_enable_languages}${language},"
2305             potential_languages="${potential_languages}${language},"
2306             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2307             enabled_target_libs="$enabled_target_libs $target_libs"
2308             case "${boot_language}:,$enable_stage1_languages," in
2309               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2310                 # Add to (comma-separated) list of stage 1 languages.
2311                 case ",$stage1_languages," in
2312                   *,$language,* | ,yes, | ,all,) ;;
2313                   *) stage1_languages="${stage1_languages}${language}," ;;
2314                 esac
2315                 # We need to bootstrap any supporting libraries.
2316                 bootstrap_target_libs=`echo "${bootstrap_target_libs}${target_libs}," | sed "s/ /,/g"`
2317                 ;;
2318             esac
2319             ;;
2320         esac
2321         ;;
2322     esac
2323   done
2324
2325   # Add target libraries which are only needed for disabled languages
2326   # to noconfigdirs.
2327   if test -n "$disabled_target_libs"; then
2328     for dir in $disabled_target_libs; do
2329       case " $enabled_target_libs " in
2330       *" ${dir} "*) ;;
2331       *) noconfigdirs="$noconfigdirs $dir" ;;
2332       esac
2333     done
2334   fi
2335
2336   AC_ARG_ENABLE(stage1-languages,
2337   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2338                   [choose additional languages to build during
2339                   stage1.  Mostly useful for compiler development])],
2340   [case ,${enable_stage1_languages}, in
2341     ,no,|,,)
2342       # Set it to something that will have no effect in the loop below
2343       enable_stage1_languages=c ;;
2344     ,yes,)
2345       enable_stage1_languages=`echo $new_enable_languages | \
2346         sed -e "s/^,//" -e "s/,$//" ` ;;
2347     *,all,*)
2348       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2349         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2350   esac
2351
2352   # Add "good" languages from enable_stage1_languages to stage1_languages,
2353   # while "bad" languages go in missing_languages.  Leave no duplicates.
2354   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2355     case $potential_languages in
2356       *,$i,*)
2357         case $stage1_languages in
2358           *,$i,*) ;;
2359           *) stage1_languages="$stage1_languages$i," ;;
2360         esac ;;
2361       *)
2362         case $missing_languages in
2363           *,$i,*) ;;
2364           *) missing_languages="$missing_languages$i," ;;
2365         esac ;;
2366      esac
2367   done])
2368
2369   # Remove leading/trailing commas that were added for simplicity
2370   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2371   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2372   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2373   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2374
2375   if test "x$missing_languages" != x; then
2376     AC_MSG_ERROR([
2377 The following requested languages could not be built: ${missing_languages}
2378 Supported languages are: ${potential_languages}])
2379   fi
2380   if test "x$new_enable_languages" != "x$enable_languages"; then
2381     echo The following languages will be built: ${new_enable_languages}
2382     enable_languages="$new_enable_languages"
2383   fi
2384
2385   AC_SUBST(stage1_languages)
2386   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2387 fi
2388
2389 # Handle --disable-<component> generically.
2390 for dir in $configdirs $build_configdirs $target_configdirs ; do
2391   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2392   varname=`echo $dirname | sed -e s/+/_/g`
2393   if eval test x\${enable_${varname}} "=" xno ; then
2394     noconfigdirs="$noconfigdirs $dir"
2395   fi
2396 done
2397
2398 # Check for Boehm's garbage collector
2399 AC_ARG_ENABLE(objc-gc,
2400 [AS_HELP_STRING([--enable-objc-gc],
2401                 [enable use of Boehm's garbage collector with the
2402                  GNU Objective-C runtime])])
2403 AC_ARG_WITH([target-bdw-gc],
2404 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2405                 [specify prefix directory for installed bdw-gc package.
2406                  Equivalent to --with-target-bdw-gc-include=PATH/include
2407                  plus --with-target-bdw-gc-lib=PATH/lib])])
2408 AC_ARG_WITH([target-bdw-gc-include],
2409 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2410                 [specify directories for installed bdw-gc include files])])
2411 AC_ARG_WITH([target-bdw-gc-lib],
2412 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2413                 [specify directories for installed bdw-gc library])])
2414
2415 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2416   AC_MSG_CHECKING([for bdw garbage collector])
2417   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2418     dnl no bdw-gw options, assume default locations
2419     AC_MSG_RESULT([using bdw-gc in default locations])
2420   else
2421     dnl bdw-gw options, first error checking, complete checking in libobjc
2422     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2423       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2424     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2425       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2426     else
2427       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2428     fi
2429   fi
2430 esac
2431
2432 # Disable libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2433 case ,${enable_languages}, in
2434   *,c++,*)
2435     # Disable libitm, libsanitizer if we're not building libstdc++
2436     case "${noconfigdirs}" in
2437       *target-libstdc++-v3*)
2438         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2439         ;;
2440       *) ;;
2441     esac
2442     ;;
2443   *)
2444     noconfigdirs="$noconfigdirs target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2445     ;;
2446 esac
2447
2448 # If gcc/ is not in the source tree then we'll not be building a
2449 # target compiler, assume in that case we don't want to build any
2450 # target libraries or tools.
2451 #
2452 # This was added primarily for the benefit for binutils-gdb who reuse
2453 # this configure script, but don't always have target tools available.
2454 if test ! -d ${srcdir}/gcc; then
2455    skipdirs="${skipdirs} ${target_configdirs}"
2456 fi
2457
2458 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2459 # $build_configdirs and $target_configdirs.
2460 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2461
2462 notsupp=""
2463 for dir in . $skipdirs $noconfigdirs ; do
2464   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2465   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2466     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2467     if test -r $srcdir/$dirname/configure ; then
2468       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2469         true
2470       else
2471         notsupp="$notsupp $dir"
2472       fi
2473     fi
2474   fi
2475   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2476     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2477     if test -r $srcdir/$dirname/configure ; then
2478       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2479         true
2480       else
2481         notsupp="$notsupp $dir"
2482       fi
2483     fi
2484   fi
2485   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2486     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2487     if test -r $srcdir/$dirname/configure ; then
2488       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2489         true
2490       else
2491         notsupp="$notsupp $dir"
2492       fi
2493     fi
2494   fi
2495 done
2496
2497 # Quietly strip out all directories which aren't configurable in this tree.
2498 # This relies on all configurable subdirectories being autoconfiscated, which
2499 # is now the case.
2500 build_configdirs_all="$build_configdirs"
2501 build_configdirs=
2502 for i in ${build_configdirs_all} ; do
2503   j=`echo $i | sed -e s/build-//g`
2504   if test -f ${srcdir}/$j/configure ; then
2505     build_configdirs="${build_configdirs} $i"
2506   fi
2507 done
2508
2509 configdirs_all="$configdirs"
2510 configdirs=
2511 for i in ${configdirs_all} ; do
2512   if test -f ${srcdir}/$i/configure ; then
2513     configdirs="${configdirs} $i"
2514   fi
2515 done
2516
2517 target_configdirs_all="$target_configdirs"
2518 target_configdirs=
2519 for i in ${target_configdirs_all} ; do
2520   j=`echo $i | sed -e s/target-//g`
2521   if test -f ${srcdir}/$j/configure ; then
2522     target_configdirs="${target_configdirs} $i"
2523   fi
2524 done
2525
2526 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2527 # so we have to add it after the preceding checks.
2528 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2529 then
2530   case " $configdirs " in
2531     *" libiberty "*)
2532       # If we can build libiberty, we can also build libiberty-linker-plugin.
2533       configdirs="$configdirs libiberty-linker-plugin"
2534       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2535         --with-libiberty=../libiberty-linker-plugin";;
2536     *)
2537       AC_MSG_ERROR([libiberty missing]);;
2538   esac
2539 fi
2540
2541 # Sometimes we have special requirements for the host libiberty.
2542 extra_host_libiberty_configure_flags=
2543 case " $configdirs " in
2544   *" lto-plugin "* | *" libcc1 "* | *" gdbserver "*)
2545     # When these are to be built as shared libraries, the same applies to
2546     # libiberty.
2547     extra_host_libiberty_configure_flags=--enable-shared
2548     ;;
2549 esac
2550 AC_SUBST(extra_host_libiberty_configure_flags)
2551
2552 # Sometimes we have special requirements for the host zlib.
2553 extra_host_zlib_configure_flags=
2554 case " $configdirs " in
2555   *" bfd "*)
2556     # When bfd is to be built as a shared library, the same applies to
2557     # zlib.
2558     if test "$enable_shared" = "yes"; then
2559       extra_host_zlib_configure_flags=--enable-host-shared
2560     fi
2561     ;;
2562 esac
2563 AC_SUBST(extra_host_zlib_configure_flags)
2564
2565 # Produce a warning message for the subdirs we can't configure.
2566 # This isn't especially interesting in the Cygnus tree, but in the individual
2567 # FSF releases, it's important to let people know when their machine isn't
2568 # supported by the one or two programs in a package.
2569
2570 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2571   # If $appdirs is non-empty, at least one of those directories must still
2572   # be configured, or we error out.  (E.g., if the gas release supports a
2573   # specified target in some subdirs but not the gas subdir, we shouldn't
2574   # pretend that all is well.)
2575   if test -n "$appdirs" ; then
2576     for dir in $appdirs ; do
2577       if test -r $dir/Makefile.in ; then
2578         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2579           appdirs=""
2580           break
2581         fi
2582         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2583           appdirs=""
2584           break
2585         fi
2586       fi
2587     done
2588     if test -n "$appdirs" ; then
2589       echo "*** This configuration is not supported by this package." 1>&2
2590       exit 1
2591     fi
2592   fi
2593   # Okay, some application will build, or we don't care to check.  Still
2594   # notify of subdirs not getting built.
2595   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2596   echo "    ${notsupp}" 1>&2
2597   echo "    (Any other directories should still work fine.)" 1>&2
2598 fi
2599
2600 case "$host" in
2601   *msdosdjgpp*)
2602     enable_gdbtk=no ;;
2603 esac
2604
2605 # To find our prefix, in gcc_cv_tool_prefix.
2606 ACX_TOOL_DIRS
2607
2608 copy_dirs=
2609
2610 AC_ARG_WITH([build-sysroot],
2611   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2612                   [use sysroot as the system root during the build])],
2613   [if test x"$withval" != x ; then
2614      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2615    fi],
2616   [SYSROOT_CFLAGS_FOR_TARGET=])
2617 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2618
2619 AC_ARG_WITH([debug-prefix-map],
2620   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2621                   [map A to B, C to D ... in debug information])],
2622   [if test x"$withval" != x; then
2623      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2624      for debug_map in $withval; do
2625        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2626      done
2627    fi],
2628   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2629 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2630
2631 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2632 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2633 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2634 # We want to ensure that TARGET libraries (which we know are built with
2635 # gcc) are built with "-O2 -g", so include those options when setting
2636 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2637 if test "x$CFLAGS_FOR_TARGET" = x; then
2638   if test "x${is_cross_compiler}" = xyes; then
2639     CFLAGS_FOR_TARGET="-g -O2"
2640   else
2641     CFLAGS_FOR_TARGET=$CFLAGS
2642     case " $CFLAGS " in
2643       *" -O2 "*) ;;
2644       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2645     esac
2646     case " $CFLAGS " in
2647       *" -g "* | *" -g3 "*) ;;
2648       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2649     esac
2650   fi
2651 fi
2652 AC_SUBST(CFLAGS_FOR_TARGET)
2653
2654 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2655   if test "x${is_cross_compiler}" = xyes; then
2656     CXXFLAGS_FOR_TARGET="-g -O2"
2657   else
2658     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2659     case " $CXXFLAGS " in
2660       *" -O2 "*) ;;
2661       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2662     esac
2663     case " $CXXFLAGS " in
2664       *" -g "* | *" -g3 "*) ;;
2665       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2666     esac
2667   fi
2668 fi
2669 AC_SUBST(CXXFLAGS_FOR_TARGET)
2670
2671 AC_SUBST(LDFLAGS_FOR_TARGET)
2672
2673 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2674 # the named directory are copied to $(tooldir)/sys-include.
2675 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2676   if test x${is_cross_compiler} = xno ; then
2677     echo 1>&2 '***' --with-headers is only supported when cross compiling
2678     exit 1
2679   fi
2680   if test x"${with_headers}" != xyes ; then
2681     x=${gcc_cv_tool_prefix}
2682     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2683   fi
2684 fi
2685
2686 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2687 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2688 # are permitted.
2689 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2690   if test x${is_cross_compiler} = xno ; then
2691     echo 1>&2 '***' --with-libs is only supported when cross compiling
2692     exit 1
2693   fi
2694   if test x"${with_libs}" != xyes ; then
2695     # Copy the libraries in reverse order, so that files in the first named
2696     # library override files in subsequent libraries.
2697     x=${gcc_cv_tool_prefix}
2698     for l in ${with_libs}; do
2699       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2700     done
2701   fi
2702 fi
2703
2704 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2705 #
2706 # This is done by determining whether or not the appropriate directory
2707 # is available, and by checking whether or not specific configurations
2708 # have requested that this magic not happen.
2709 #
2710 # The command line options always override the explicit settings in
2711 # configure.ac, and the settings in configure.ac override this magic.
2712 #
2713 # If the default for a toolchain is to use GNU as and ld, and you don't
2714 # want to do that, then you should use the --without-gnu-as and
2715 # --without-gnu-ld options for the configure script.  Similarly, if
2716 # the default is to use the included zlib and you don't want to do that,
2717 # you should use the --with-system-zlib option for the configure script.
2718
2719 if test x${use_gnu_as} = x &&
2720    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2721   with_gnu_as=yes
2722   extra_host_args="$extra_host_args --with-gnu-as"
2723 fi
2724
2725 if test x${use_gnu_ld} = x &&
2726    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2727   with_gnu_ld=yes
2728   extra_host_args="$extra_host_args --with-gnu-ld"
2729 fi
2730
2731 if test x${use_included_zlib} = x &&
2732    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2733   :
2734 else
2735   with_system_zlib=yes
2736   extra_host_args="$extra_host_args --with-system-zlib"
2737 fi
2738
2739 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2740 # can detect this case.
2741
2742 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2743   with_newlib=yes
2744   extra_host_args="$extra_host_args --with-newlib"
2745 fi
2746
2747 # Handle ${copy_dirs}
2748 set fnord ${copy_dirs}
2749 shift
2750 while test $# != 0 ; do
2751   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2752     :
2753   else
2754     echo Copying $1 to $2
2755
2756     # Use the install script to create the directory and all required
2757     # parent directories.
2758     if test -d $2 ; then
2759       :
2760     else
2761       echo >config.temp
2762       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2763     fi
2764
2765     # Copy the directory, assuming we have tar.
2766     # FIXME: Should we use B in the second tar?  Not all systems support it.
2767     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2768
2769     # It is the responsibility of the user to correctly adjust all
2770     # symlinks.  If somebody can figure out how to handle them correctly
2771     # here, feel free to add the code.
2772
2773     echo $1 > $2/COPIED
2774   fi
2775   shift; shift
2776 done
2777
2778 # Determine a target-dependent exec_prefix that the installed
2779 # gcc will search in.  Keep this list sorted by triplet, with
2780 # the *-*-osname triplets last.
2781 md_exec_prefix=
2782 case "${target}" in
2783   i[[34567]]86-pc-msdosdjgpp*)
2784     md_exec_prefix=/dev/env/DJDIR/bin
2785     ;;
2786   *-*-hpux* | \
2787   *-*-nto-qnx* | \
2788   *-*-solaris2*)
2789     md_exec_prefix=/usr/ccs/bin
2790     ;;
2791 esac
2792
2793 extra_arflags_for_target=
2794 extra_nmflags_for_target=
2795 extra_ranlibflags_for_target=
2796 target_makefile_frag=/dev/null
2797 case "${target}" in
2798   spu-*-*)
2799     target_makefile_frag="config/mt-spu"
2800     ;;
2801   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2802     target_makefile_frag="config/mt-sde"
2803     ;;
2804   mipsisa*-*-elfoabi*)
2805     target_makefile_frag="config/mt-mips-elfoabi"
2806     ;;
2807   mips*-*-*linux* | mips*-*-gnu*)
2808     target_makefile_frag="config/mt-mips-gnu"
2809     ;;
2810   nios2-*-elf*)
2811     target_makefile_frag="config/mt-nios2-elf"
2812     ;;
2813   *-*-linux-android*)
2814     target_makefile_frag="config/mt-android"
2815     ;;
2816   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2817     target_makefile_frag="config/mt-gnu"
2818     ;;
2819   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2820     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2821     # commands to handle both 32-bit and 64-bit objects.  These flags are
2822     # harmless if we're using GNU nm or ar.
2823     extra_arflags_for_target=" -X32_64"
2824     extra_nmflags_for_target=" -B -X32_64"
2825     ;;
2826 esac
2827
2828 alphaieee_frag=/dev/null
2829 case $target in
2830   alpha*-*-*)
2831     # This just makes sure to use the -mieee option to build target libs.
2832     # This should probably be set individually by each library.
2833     alphaieee_frag="config/mt-alphaieee"
2834     ;;
2835 esac
2836
2837 # If --enable-target-optspace always use -Os instead of -O2 to build
2838 # the target libraries, similarly if it is not specified, use -Os
2839 # on selected platforms.
2840 ospace_frag=/dev/null
2841 case "${enable_target_optspace}:${target}" in
2842   yes:*)
2843     ospace_frag="config/mt-ospace"
2844     ;;
2845   :d30v-*)
2846     ospace_frag="config/mt-d30v"
2847     ;;
2848   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2849     ospace_frag="config/mt-ospace"
2850     ;;
2851   no:* | :*)
2852     ;;
2853   *)
2854     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2855     ;;
2856 esac
2857
2858 # Some systems (e.g., one of the i386-aix systems the gas testers are
2859 # using) don't handle "\$" correctly, so don't use it here.
2860 tooldir='${exec_prefix}'/${target_noncanonical}
2861 build_tooldir=${tooldir}
2862
2863 # Create a .gdbinit file which runs the one in srcdir
2864 # and tells GDB to look there for source files.
2865
2866 if test -r ${srcdir}/.gdbinit ; then
2867   case ${srcdir} in
2868     .) ;;
2869     *) cat > ./.gdbinit <<EOF
2870 # ${NO_EDIT}
2871 dir ${srcdir}
2872 dir .
2873 source ${srcdir}/.gdbinit
2874 EOF
2875     ;;
2876   esac
2877 fi
2878
2879 # Make sure that the compiler is able to generate an executable.  If it
2880 # can't, we are probably in trouble.  We don't care whether we can run the
2881 # executable--we might be using a cross compiler--we only care whether it
2882 # can be created.  At this point the main configure script has set CC.
2883 we_are_ok=no
2884 echo "int main () { return 0; }" > conftest.c
2885 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2886 if test $? = 0 ; then
2887   if test -s conftest || test -s conftest.exe ; then
2888     we_are_ok=yes
2889   fi
2890 fi
2891 case $we_are_ok in
2892   no)
2893     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2894     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2895     rm -f conftest*
2896     exit 1
2897     ;;
2898 esac
2899 rm -f conftest*
2900
2901 # Decide which environment variable is used to find dynamic libraries.
2902 case "${host}" in
2903   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2904   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2905   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2906   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2907 esac
2908
2909 # On systems where the dynamic library environment variable is PATH,
2910 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2911 # built executables to PATH.
2912 if test "$RPATH_ENVVAR" = PATH; then
2913   GCC_SHLIB_SUBDIR=/shlib
2914 else
2915   GCC_SHLIB_SUBDIR=
2916 fi
2917
2918 # Adjust the toplevel makefile according to whether bootstrap was selected.
2919 case $enable_bootstrap in
2920   yes)
2921     bootstrap_suffix=bootstrap
2922     BUILD_CONFIG=bootstrap-debug
2923     ;;
2924   no)
2925     bootstrap_suffix=no-bootstrap
2926     BUILD_CONFIG=
2927     ;;
2928 esac
2929
2930 AC_MSG_CHECKING(for default BUILD_CONFIG)
2931
2932 AC_ARG_WITH([build-config],
2933   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2934                   [use config/NAME.mk build configuration])],
2935   [case $with_build_config in
2936    yes) with_build_config= ;;
2937    no) with_build_config= BUILD_CONFIG= ;;
2938    esac])
2939
2940 if test "x${with_build_config}" != x; then
2941   BUILD_CONFIG=$with_build_config
2942 else
2943   case $BUILD_CONFIG in
2944   bootstrap-debug)
2945     if echo "int f (void) { return 0; }" > conftest.c &&
2946        ${CC} -c conftest.c &&
2947        mv conftest.o conftest.o.g0 &&
2948        ${CC} -c -g conftest.c &&
2949        mv conftest.o conftest.o.g &&
2950        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2951       :
2952     else
2953       BUILD_CONFIG=
2954     fi
2955     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2956     ;;
2957   esac
2958 fi
2959 AC_MSG_RESULT($BUILD_CONFIG)
2960 AC_SUBST(BUILD_CONFIG)
2961
2962 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2963 AC_MSG_CHECKING([for --enable-vtable-verify])
2964 AC_ARG_ENABLE(vtable-verify,
2965 [AS_HELP_STRING([--enable-vtable-verify],
2966                 [Enable vtable verification feature])],
2967 [case "$enableval" in
2968  yes) enable_vtable_verify=yes ;;
2969  no)  enable_vtable_verify=no ;;
2970  *)   enable_vtable_verify=no;;
2971  esac],
2972 [enable_vtable_verify=no])
2973 AC_MSG_RESULT($enable_vtable_verify)
2974
2975 # Record target_configdirs and the configure arguments for target and
2976 # build configuration in Makefile.
2977 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2978 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2979 bootstrap_fixincludes=no
2980
2981 # If we are building libgomp, bootstrap it.
2982 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2983   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2984 fi
2985
2986 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2987 # or bootstrap-ubsan, bootstrap it.
2988 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2989   case "$BUILD_CONFIG" in
2990     *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
2991       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2992       bootstrap_fixincludes=yes
2993       ;;
2994   esac
2995 fi
2996
2997 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2998 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2999    test "$enable_vtable_verify" != no; then
3000   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
3001 fi
3002
3003 # If we are building libatomic and the list of enabled languages includes the
3004 # D frontend, bootstrap it.
3005 if echo " ${target_configdirs} " | grep " libatomic " > /dev/null 2>&1; then
3006   case ,${enable_languages}, in
3007     *,d,*)
3008       bootstrap_target_libs=${bootstrap_target_libs}target-libatomic,
3009       ;;
3010   esac
3011 fi
3012
3013 # Determine whether gdb needs tk/tcl or not.
3014 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
3015 # and in that case we want gdb to be built without tk.  Ugh!
3016 # In fact I believe gdb is the *only* package directly dependent on tk,
3017 # so we should be able to put the 'maybe's in unconditionally and
3018 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
3019 # 100% sure that that's safe though.
3020
3021 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
3022 case "$enable_gdbtk" in
3023   no)
3024     GDB_TK="" ;;
3025   yes)
3026     GDB_TK="${gdb_tk}" ;;
3027   *)
3028     # Only add the dependency on gdbtk when GDBtk is part of the gdb
3029     # distro.  Eventually someone will fix this and move Insight, nee
3030     # gdbtk to a separate directory.
3031     if test -d ${srcdir}/gdb/gdbtk ; then
3032       GDB_TK="${gdb_tk}"
3033     else
3034       GDB_TK=""
3035     fi
3036     ;;
3037 esac
3038 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
3039 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
3040
3041 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
3042 # else does, only include them if one of these is built.  The Makefile
3043 # provides the ordering, so it's enough here to add to the list.
3044 case " ${configdirs} " in
3045   *\ gdb\ *)
3046     configdirs="${configdirs} gnulib gdbsupport"
3047     ;;
3048   *\ gdbserver\ *)
3049     configdirs="${configdirs} gnulib gdbsupport"
3050     ;;
3051   *\ sim\ *)
3052     configdirs="${configdirs} gnulib"
3053     ;;
3054 esac
3055
3056 # Strip out unwanted targets.
3057
3058 # While at that, we remove Makefiles if we were started for recursive
3059 # configuration, so that the top-level Makefile reconfigures them,
3060 # like we used to do when configure itself was recursive.
3061
3062 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
3063 # but now we're fixing up the Makefile ourselves with the additional
3064 # commands passed to AC_CONFIG_FILES.  Use separate variables
3065 # extrasub-{build,host,target} not because there is any reason to split
3066 # the substitutions up that way, but only to remain below the limit of
3067 # 99 commands in a script, for HP-UX sed.
3068
3069 # Do not nest @if/@endif or @unless/@endunless pairs, because
3070 # configure will not warn you at all.
3071
3072 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
3073   yes:yes:*\ gold\ *:*,c++,*) ;;
3074   yes:yes:*\ gold\ *:*)
3075     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
3076     ;;
3077 esac
3078
3079 extrasub_build=
3080 for module in ${build_configdirs} ; do
3081   if test -z "${no_recursion}" \
3082      && test -f ${build_subdir}/${module}/Makefile; then
3083     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
3084     rm -f ${build_subdir}/${module}/Makefile
3085   fi
3086   extrasub_build="$extrasub_build
3087 /^@if build-$module\$/d
3088 /^@endif build-$module\$/d
3089 /^@unless build-$module\$/,/^@endunless build-$module\$/d
3090 /^@if build-$module-$bootstrap_suffix\$/d
3091 /^@endif build-$module-$bootstrap_suffix\$/d
3092 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
3093 done
3094 extrasub_host=
3095 for module in ${configdirs} ; do
3096   if test -z "${no_recursion}"; then
3097     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
3098       if test -f ${file}; then
3099         echo 1>&2 "*** removing ${file} to force reconfigure"
3100         rm -f ${file}
3101       fi
3102     done
3103   fi
3104   case ${module},${bootstrap_fixincludes} in
3105     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
3106     *) host_bootstrap_suffix=$bootstrap_suffix ;;
3107   esac
3108   extrasub_host="$extrasub_host
3109 /^@if $module\$/d
3110 /^@endif $module\$/d
3111 /^@unless $module\$/,/^@endunless $module\$/d
3112 /^@if $module-$host_bootstrap_suffix\$/d
3113 /^@endif $module-$host_bootstrap_suffix\$/d
3114 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
3115 done
3116 extrasub_target=
3117 for module in ${target_configdirs} ; do
3118   if test -z "${no_recursion}" \
3119      && test -f ${target_subdir}/${module}/Makefile; then
3120     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
3121     rm -f ${target_subdir}/${module}/Makefile
3122   fi
3123
3124   # We only bootstrap target libraries listed in bootstrap_target_libs.
3125   case $bootstrap_target_libs in
3126     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
3127     *) target_bootstrap_suffix=no-bootstrap ;;
3128   esac
3129
3130   extrasub_target="$extrasub_target
3131 /^@if target-$module\$/d
3132 /^@endif target-$module\$/d
3133 /^@unless target-$module\$/,/^@endunless target-$module\$/d
3134 /^@if target-$module-$target_bootstrap_suffix\$/d
3135 /^@endif target-$module-$target_bootstrap_suffix\$/d
3136 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
3137 done
3138
3139 # Do the final fixup along with target modules.
3140 extrasub_target="$extrasub_target
3141 /^@if /,/^@endif /d
3142 /^@unless /d
3143 /^@endunless /d"
3144
3145 if test "$enable_pgo_build" != "no"; then
3146   extrasub_build="$extrasub_build
3147 /^@if pgo-build\$/d
3148 /^@endif pgo-build\$/d"
3149 fi
3150
3151 # Create the serialization dependencies.  This uses a temporary file.
3152
3153 AC_ARG_ENABLE([serial-configure],
3154 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
3155                 [force sequential configuration of
3156                  sub-packages for the host, target or build
3157                  machine, or all sub-packages])])
3158
3159 case ${enable_serial_configure} in
3160   yes)
3161     enable_serial_build_configure=yes
3162     enable_serial_host_configure=yes
3163     enable_serial_target_configure=yes
3164     ;;
3165 esac
3166
3167 # These force 'configure's to be done one at a time, to avoid problems
3168 # with contention over a shared config.cache.
3169 rm -f serdep.tmp
3170 echo '# serdep.tmp' > serdep.tmp
3171 olditem=
3172 test "x${enable_serial_build_configure}" = xyes &&
3173 for item in ${build_configdirs} ; do
3174   case ${olditem} in
3175     "") ;;
3176     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
3177   esac
3178   olditem=${item}
3179 done
3180 olditem=
3181 test "x${enable_serial_host_configure}" = xyes &&
3182 for item in ${configdirs} ; do
3183   case ${olditem} in
3184     "") ;;
3185     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
3186   esac
3187   olditem=${item}
3188 done
3189 olditem=
3190 test "x${enable_serial_target_configure}" = xyes &&
3191 for item in ${target_configdirs} ; do
3192   case ${olditem} in
3193     "") ;;
3194     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
3195   esac
3196   olditem=${item}
3197 done
3198 serialization_dependencies=serdep.tmp
3199 AC_SUBST_FILE(serialization_dependencies)
3200
3201 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
3202 # target, nonopt, and variable assignments.  These are the ones we
3203 # might not want to pass down to subconfigures.  The exception being
3204 # --cache-file=/dev/null, which is used to turn off the use of cache
3205 # files altogether, and which should be passed on to subconfigures.
3206 # Also strip program-prefix, program-suffix, and program-transform-name,
3207 # so that we can pass down a consistent program-transform-name.
3208 baseargs=
3209 tbaseargs=
3210 keep_next=no
3211 skip_next=no
3212 eval "set -- $ac_configure_args"
3213 for ac_arg
3214 do
3215   if test X"$skip_next" = X"yes"; then
3216     skip_next=no
3217     continue
3218   fi
3219   if test X"$keep_next" = X"yes"; then
3220     case $ac_arg in
3221       *\'*)
3222         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3223     esac
3224     baseargs="$baseargs '$ac_arg'"
3225     tbaseargs="$tbaseargs '$ac_arg'"
3226     keep_next=no
3227     continue
3228   fi
3229
3230   # Handle separated arguments.  Based on the logic generated by
3231   # autoconf 2.59.
3232   case $ac_arg in
3233     *=* | --config-cache | -C | -disable-* | --disable-* \
3234       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3235       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3236       | -with-* | --with-* | -without-* | --without-* | --x)
3237       separate_arg=no
3238       ;;
3239     -*)
3240       separate_arg=yes
3241       ;;
3242     *)
3243       separate_arg=no
3244       ;;
3245   esac
3246
3247   skip_targ=no
3248   case $ac_arg in
3249 changequote(,)
3250   --with-* | --without-*)
3251     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3252
3253     case $libopt in
3254     *[-_]include)
3255       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3256       ;;
3257     *[-_]lib)
3258       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3259       ;;
3260     *)
3261       lib=$libopt
3262       ;;
3263     esac
3264 changequote([,])
3265
3266     case $lib in
3267     mpc | mpfr | gmp | isl)
3268       # If we're processing --with-$lib, --with-$lib-include or
3269       # --with-$lib-lib, for one of the libs above, and target is
3270       # different from host, don't pass the current argument to any
3271       # target library's configure.
3272       if test x$is_cross_compiler = xyes; then
3273         skip_targ=yes
3274       fi
3275       ;;
3276     esac
3277     ;;
3278   esac
3279
3280   case "$ac_arg" in
3281     --cache-file=/dev/null | \
3282     -cache-file=/dev/null )
3283       # Handled here to avoid the test to skip args below.
3284       baseargs="$baseargs '$ac_arg'"
3285       tbaseargs="$tbaseargs '$ac_arg'"
3286       # Assert: $separate_arg should always be no.
3287       keep_next=$separate_arg
3288       ;;
3289     --no*)
3290       continue
3291       ;;
3292     --c* | \
3293     --sr* | \
3294     --ho* | \
3295     --bu* | \
3296     --t* | \
3297     --program-* | \
3298     -cache_file* | \
3299     -srcdir* | \
3300     -host* | \
3301     -build* | \
3302     -target* | \
3303     -program-prefix* | \
3304     -program-suffix* | \
3305     -program-transform-name* )
3306       skip_next=$separate_arg
3307       continue
3308       ;;
3309     -*)
3310       # An option.  Add it.
3311       case $ac_arg in
3312         *\'*)
3313           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3314       esac
3315       baseargs="$baseargs '$ac_arg'"
3316       if test X"$skip_targ" = Xno; then
3317         tbaseargs="$tbaseargs '$ac_arg'"
3318       fi
3319       keep_next=$separate_arg
3320       ;;
3321     *)
3322       # Either a variable assignment, or a nonopt (triplet).  Don't
3323       # pass it down; let the Makefile handle this.
3324       continue
3325       ;;
3326   esac
3327 done
3328 # Remove the initial space we just introduced and, as these will be
3329 # expanded by make, quote '$'.
3330 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3331
3332 # Add in --program-transform-name, after --program-prefix and
3333 # --program-suffix have been applied to it.  Autoconf has already
3334 # doubled dollar signs and backslashes in program_transform_name; we want
3335 # the backslashes un-doubled, and then the entire thing wrapped in single
3336 # quotes, because this will be expanded first by make and then by the shell.
3337 # Also, because we want to override the logic in subdir configure scripts to
3338 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3339 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3340 ${program_transform_name}
3341 EOF_SED
3342 gcc_transform_name=`cat conftestsed.out`
3343 rm -f conftestsed.out
3344 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3345 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3346 if test "$silent" = yes; then
3347   baseargs="$baseargs --silent"
3348   tbaseargs="$tbaseargs --silent"
3349 fi
3350
3351 baseargs="$baseargs --disable-option-checking"
3352 tbaseargs="$tbaseargs --disable-option-checking"
3353
3354 if test "$enable_year2038" = no; then
3355   baseargs="$baseargs --disable-year2038"
3356   tbaseargs="$tbaseargs --disable-year2038"
3357 fi
3358
3359 # Record and document user additions to sub configure arguments.
3360 AC_ARG_VAR([build_configargs],
3361            [additional configure arguments for build directories])
3362 AC_ARG_VAR([host_configargs],
3363            [additional configure arguments for host directories])
3364 AC_ARG_VAR([target_configargs],
3365            [additional configure arguments for target directories])
3366
3367 # For the build-side libraries, we just need to pretend we're native,
3368 # and not use the same cache file.  Multilibs are neither needed nor
3369 # desired.  We can't even use the same cache file for all build-side
3370 # libraries, as they're compiled differently; some with C, some with
3371 # C++ or with different feature-enabling options.
3372 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3373
3374 # For host modules, accept cache file option, or specification as blank.
3375 case "${cache_file}" in
3376 "") # empty
3377   cache_file_option="" ;;
3378 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3379   cache_file_option="--cache-file=${cache_file}" ;;
3380 *) # relative path
3381   cache_file_option="--cache-file=../${cache_file}" ;;
3382 esac
3383
3384 # Host dirs don't like to share a cache file either, horribly enough.
3385 # This seems to be due to autoconf 2.5x stupidity.
3386 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3387
3388 target_configargs="$target_configargs ${tbaseargs}"
3389
3390 # Passing a --with-cross-host argument lets the target libraries know
3391 # whether they are being built with a cross-compiler or being built
3392 # native.  However, it would be better to use other mechanisms to make the
3393 # sorts of decisions they want to make on this basis.  Please consider
3394 # this option to be deprecated.  FIXME.
3395 if test x${is_cross_compiler} = xyes ; then
3396   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3397 fi
3398
3399 # Special user-friendly check for native x86_64-linux build, if
3400 # multilib is not explicitly enabled.
3401 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3402   x86_64-*linux*:yes:$build:$build:)
3403     # Make sure we have a development environment that handles 32-bit
3404     dev64=no
3405     echo "int main () { return 0; }" > conftest.c
3406     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3407     if test $? = 0 ; then
3408       if test -s conftest || test -s conftest.exe ; then
3409         dev64=yes
3410       fi
3411     fi
3412     rm -f conftest*
3413     if test x${dev64} != xyes ; then
3414       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.])
3415     fi
3416     ;;
3417 esac
3418
3419 # Default to --enable-multilib.
3420 if test x${enable_multilib} = x ; then
3421   target_configargs="--enable-multilib ${target_configargs}"
3422 fi
3423
3424 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3425 # changed from the earlier setting of with_newlib.
3426 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3427   target_configargs="--with-newlib ${target_configargs}"
3428 fi
3429
3430 # Different target subdirs use different values of certain variables
3431 # (notably CXX).  Worse, multilibs use *lots* of different values.
3432 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3433 # it doesn't automatically accept command-line overrides of them.
3434 # This means it's not safe for target subdirs to share a cache file,
3435 # which is disgusting, but there you have it.  Hopefully this can be
3436 # fixed in future.  It's still worthwhile to use a cache file for each
3437 # directory.  I think.
3438
3439 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3440 # We need to pass --target, as newer autoconf's requires consistency
3441 # for target_alias and gcc doesn't manage it consistently.
3442 target_configargs="--cache-file=./config.cache ${target_configargs}"
3443
3444 FLAGS_FOR_TARGET=
3445 case " $target_configdirs " in
3446  *" newlib "*)
3447   case " $target_configargs " in
3448   *" --with-newlib "*)
3449    case "$target" in
3450     *-cygwin*)
3451       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3452       ;;
3453    esac
3454
3455    # If we're not building GCC, don't discard standard headers.
3456    if test -d ${srcdir}/gcc; then
3457      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3458
3459      if test "${build}" != "${host}"; then
3460        # On Canadian crosses, CC_FOR_TARGET will have already been set
3461        # by `configure', so we won't have an opportunity to add -Bgcc/
3462        # to it.  This is right: we don't want to search that directory
3463        # for binaries, but we want the header files in there, so add
3464        # them explicitly.
3465        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3466
3467        # Someone might think of using the pre-installed headers on
3468        # Canadian crosses, in case the installed compiler is not fully
3469        # compatible with the compiler being built.  In this case, it
3470        # would be better to flag an error than risking having
3471        # incompatible object files being constructed.  We can't
3472        # guarantee that an error will be flagged, but let's hope the
3473        # compiler will do it, when presented with incompatible header
3474        # files.
3475      fi
3476    fi
3477
3478    case "${target}-${is_cross_compiler}" in
3479    i[[3456789]]86-*-linux*-no)
3480       # Here host == target, so we don't need to build gcc,
3481       # so we don't want to discard standard headers.
3482       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3483       ;;
3484    *)
3485       # If we're building newlib, use its generic headers last, but search
3486       # for any libc-related directories first (so make it the last -B
3487       # switch).
3488       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3489
3490       # If we're building libgloss, find the startup file, simulator library
3491       # and linker script.
3492       case " $target_configdirs " in
3493         *" libgloss "*)
3494         # Look for startup file, simulator library and maybe linker script.
3495         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3496         # Look for libnosys.a in case the target needs it.
3497         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3498         # Most targets have the linker script in the source directory.
3499         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3500         ;;
3501       esac
3502       ;;
3503    esac
3504    ;;
3505   esac
3506   ;;
3507 esac
3508
3509 case "$target" in
3510   x86_64-*mingw* | *-w64-mingw*)
3511   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3512   # however, use a symlink named 'mingw' in ${prefix} .
3513     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3514     ;;
3515   *-mingw*)
3516   # MinGW can't be handled as Cygwin above since it does not use newlib.
3517     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3518     ;;
3519 esac
3520
3521 # Allow the user to override the flags for
3522 # our build compiler if desired.
3523 if test x"${build}" = x"${host}" ; then
3524   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3525   CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
3526   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3527   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3528 fi
3529
3530 # On Canadian crosses, we'll be searching the right directories for
3531 # the previously-installed cross compiler, so don't bother to add
3532 # flags for directories within the install tree of the compiler
3533 # being built; programs in there won't even run.
3534 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3535   # Search for pre-installed headers if nothing else fits.
3536   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3537 fi
3538
3539 if test "x${use_gnu_ld}" = x &&
3540    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3541   # Arrange for us to find uninstalled linker scripts.
3542   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3543 fi
3544
3545 # Search for other target-specific linker scripts and such.
3546 case "${target}" in
3547   mep*)
3548     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3549     ;;
3550   # The VxWorks support for shared libraries is getting in
3551   # incrementally.  Make sure it doesn't get activated implicitly:
3552   *vxworks*)
3553     if test "${enable_shared-unset}" = unset ; then
3554       enable_shared=no
3555       # So the build of libraries knows ...
3556       target_configargs="${target_configargs} --disable-shared"
3557       # So gcc knows ...
3558       host_configargs="${host_configargs} --disable-shared"
3559     fi
3560     ;;
3561 esac
3562
3563 # Makefile fragments.
3564 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3565 do
3566   eval fragval=\$$frag
3567   if test $fragval != /dev/null; then
3568     eval $frag=${srcdir}/$fragval
3569   fi
3570 done
3571 AC_SUBST_FILE(host_makefile_frag)
3572 AC_SUBST_FILE(target_makefile_frag)
3573 AC_SUBST_FILE(alphaieee_frag)
3574 AC_SUBST_FILE(ospace_frag)
3575
3576 # Miscellanea: directories, flags, etc.
3577 AC_SUBST(RPATH_ENVVAR)
3578 AC_SUBST(GCC_SHLIB_SUBDIR)
3579 AC_SUBST(tooldir)
3580 AC_SUBST(build_tooldir)
3581 AC_SUBST(CONFIGURE_GDB_TK)
3582 AC_SUBST(GDB_TK)
3583 AC_SUBST(INSTALL_GDB_TK)
3584
3585 # Build module lists & subconfigure args.
3586 AC_SUBST(build_configargs)
3587 AC_SUBST(build_configdirs)
3588
3589 # Host module lists & subconfigure args.
3590 AC_SUBST(host_configargs)
3591 AC_SUBST(configdirs)
3592 AC_SUBST(target_configdirs)
3593
3594 # Target module lists & subconfigure args.
3595 AC_SUBST(target_configargs)
3596
3597
3598 # Build tools.
3599 AC_SUBST(AR_FOR_BUILD)
3600 AC_SUBST(AS_FOR_BUILD)
3601 AC_SUBST(CC_FOR_BUILD)
3602 AC_SUBST(CFLAGS_FOR_BUILD)
3603 AC_SUBST(CPP_FOR_BUILD)
3604 AC_SUBST(CPPFLAGS_FOR_BUILD)
3605 AC_SUBST(CXXFLAGS_FOR_BUILD)
3606 AC_SUBST(CXX_FOR_BUILD)
3607 AC_SUBST(DLLTOOL_FOR_BUILD)
3608 AC_SUBST(DSYMUTIL_FOR_BUILD)
3609 AC_SUBST(GFORTRAN_FOR_BUILD)
3610 AC_SUBST(GOC_FOR_BUILD)
3611 AC_SUBST(GDC_FOR_BUILD)
3612 AC_SUBST(LDFLAGS_FOR_BUILD)
3613 AC_SUBST(LD_FOR_BUILD)
3614 AC_SUBST(NM_FOR_BUILD)
3615 AC_SUBST(RANLIB_FOR_BUILD)
3616 AC_SUBST(WINDMC_FOR_BUILD)
3617 AC_SUBST(WINDRES_FOR_BUILD)
3618
3619 # Generate default definitions for YACC, M4, LEX and other programs that run
3620 # on the build machine.  These are used if the Makefile can't locate these
3621 # programs in objdir.
3622 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3623
3624 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3625 case " $build_configdirs " in
3626   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3627 esac
3628
3629 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3630 case " $build_configdirs " in
3631   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3632 esac
3633
3634 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3635 case " $build_configdirs " in
3636   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3637 esac
3638
3639 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3640 case " $build_configdirs " in
3641   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3642   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3643 esac
3644
3645 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3646 case " $build_configdirs " in
3647   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3648 esac
3649
3650 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3651 case " $build_configdirs " in
3652   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3653   *)
3654 changequote(,)
3655     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3656     # higher, else we use the "missing" dummy.
3657     if ${MAKEINFO} --version \
3658        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3659       :
3660     else
3661       MAKEINFO="$MISSING makeinfo"
3662     fi
3663     ;;
3664 changequote([,])
3665 esac
3666
3667 # FIXME: expect and dejagnu may become build tools?
3668
3669 AC_CHECK_PROGS(EXPECT, expect, expect)
3670 case " $configdirs " in
3671   *" expect "*)
3672     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3673     ;;
3674 esac
3675
3676 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3677 case " $configdirs " in
3678   *" dejagnu "*)
3679     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3680     ;;
3681 esac
3682
3683
3684 # Host tools.
3685 NCN_STRICT_CHECK_TOOLS(AR, ar)
3686 NCN_STRICT_CHECK_TOOLS(AS, as)
3687 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3688 NCN_STRICT_CHECK_TOOLS(DSYMUTIL, dsymutil)
3689 NCN_STRICT_CHECK_TOOLS(LD, ld)
3690 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3691 NCN_STRICT_CHECK_TOOLS(NM, nm)
3692 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3693 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3694 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3695 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3696 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3697 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3698 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3699 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3700 AC_SUBST(CC)
3701 AC_SUBST(CXX)
3702 AC_SUBST(CFLAGS)
3703 AC_SUBST(CXXFLAGS)
3704 AC_SUBST(GDC)
3705 AC_SUBST(GDCFLAGS)
3706 AC_SUBST(PKG_CONFIG_PATH)
3707
3708 GCC_PLUGIN_OPTION(PLUGIN_OPTION)
3709 AR_PLUGIN_OPTION=
3710 RANLIB_PLUGIN_OPTION=
3711 if test -n "$PLUGIN_OPTION"; then
3712   if $AR --help 2>&1 | grep -q "\--plugin"; then
3713     AR_PLUGIN_OPTION="$PLUGIN_OPTION"
3714   fi
3715   if $RANLIB --help 2>&1 | grep -q "\--plugin"; then
3716     RANLIB_PLUGIN_OPTION="$PLUGIN_OPTION"
3717   fi
3718 fi
3719 AC_SUBST(AR_PLUGIN_OPTION)
3720 AC_SUBST(RANLIB_PLUGIN_OPTION)
3721
3722 # Target tools.
3723 AC_ARG_WITH([build-time-tools],
3724   [AS_HELP_STRING([--with-build-time-tools=PATH],
3725                   [use given path to find target tools during the build])],
3726   [case x"$withval" in
3727      x/*) ;;
3728      *)
3729        with_build_time_tools=
3730        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3731        ;;
3732    esac],
3733   [with_build_time_tools=])
3734
3735 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3736 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3737 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3738 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3739 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3740 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3741
3742 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3743 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3744 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3745 ACX_CHECK_INSTALLED_TARGET_TOOL(DSYMUTIL_FOR_TARGET, dsymutil)
3746 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3747 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3748 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3749 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3750 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3751 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3752 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3753 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3754 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3755 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3756 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3757
3758 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3759
3760 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3761 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3762 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3763 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3764 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3765                 [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],
3766                 c++)
3767 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3768                 [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],
3769                 c++)
3770 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3771 GCC_TARGET_TOOL(dsymutil, DSYMUTIL_FOR_TARGET, DSYMUTIL)
3772 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3773 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3774                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3775 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3776                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3777 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3778                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3779 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3780 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3781 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3782 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3783 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3784 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3785 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3786 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3787 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3788 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3789 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3790
3791 AC_SUBST(FLAGS_FOR_TARGET)
3792 AC_SUBST(RAW_CXX_FOR_TARGET)
3793
3794 # Certain tools may need extra flags.
3795 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3796 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3797 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3798
3799 # When building target libraries, except in a Canadian cross, we use
3800 # the same toolchain as the compiler we just built.
3801 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3802 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3803 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3804 if test $host = $build; then
3805   case " $configdirs " in
3806     *" gcc "*)
3807       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3808       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3809       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3810       ;;
3811   esac
3812 fi
3813
3814 AC_SUBST(COMPILER_AS_FOR_TARGET)
3815 AC_SUBST(COMPILER_LD_FOR_TARGET)
3816 AC_SUBST(COMPILER_NM_FOR_TARGET)
3817
3818 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3819 AC_ARG_ENABLE(maintainer-mode,
3820 [AS_HELP_STRING([--enable-maintainer-mode],
3821                 [enable make rules and dependencies not useful
3822                  (and sometimes confusing) to the casual installer])],
3823       USE_MAINTAINER_MODE=$enableval,
3824       USE_MAINTAINER_MODE=no)
3825 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3826 AC_SUBST(MAINTAINER_MODE_TRUE)
3827 AC_SUBST(MAINTAINER_MODE_FALSE)
3828 if test "$USE_MAINTAINER_MODE" = yes; then
3829   MAINTAINER_MODE_TRUE=
3830   MAINTAINER_MODE_FALSE='#'
3831 else
3832   MAINTAINER_MODE_TRUE='#'
3833   MAINTAINER_MODE_FALSE=
3834 fi
3835 MAINT=$MAINTAINER_MODE_TRUE
3836 AC_SUBST(MAINT)dnl
3837
3838 # ---------------------
3839 # GCC bootstrap support
3840 # ---------------------
3841
3842 # Stage specific cflags for build.
3843 stage1_cflags="-g"
3844 case $build in
3845   vax-*-*)
3846     case ${GCC} in
3847       yes) stage1_cflags="-g -Wa,-J" ;;
3848       *) stage1_cflags="-g -J" ;;
3849     esac ;;
3850 esac
3851
3852 AC_SUBST(stage1_cflags)
3853
3854 # Enable --enable-checking in stage1 of the compiler.
3855 AC_ARG_ENABLE(stage1-checking,
3856 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3857                 [choose additional checking for stage1 of the compiler])],
3858 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3859 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3860   # For --disable-checking or implicit --enable-checking=release, avoid
3861   # setting --enable-checking=gc in the default stage1 checking for LTO
3862   # bootstraps.  See PR62077.
3863   case $BUILD_CONFIG in
3864     *lto*)
3865       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3866     *)
3867       stage1_checking=--enable-checking=yes,types;;
3868   esac
3869   if test "x$enable_checking" = x && \
3870      test -d ${srcdir}/gcc && \
3871      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3872     stage1_checking=--enable-checking=yes,types,extra
3873   fi
3874 else
3875   stage1_checking=--enable-checking=$enable_checking,types
3876 fi])
3877 AC_SUBST(stage1_checking)
3878
3879 # Enable -Werror in bootstrap stage2 and later.
3880 AC_ARG_ENABLE(werror,
3881 [AS_HELP_STRING([--enable-werror],
3882                 [enable -Werror in bootstrap stage2 and later])],
3883 [
3884 case ${enable_werror} in
3885   yes) stage2_werror_flag="--enable-werror-always" ;;
3886   *) stage2_werror_flag="" ;;
3887 esac
3888 ],
3889 [
3890 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3891   case $BUILD_CONFIG in
3892   bootstrap-debug)
3893       stage2_werror_flag="--enable-werror-always" ;;
3894   "")
3895       stage2_werror_flag="--enable-werror-always" ;;
3896   esac
3897 fi
3898 ])
3899
3900 AC_SUBST(stage2_werror_flag)
3901
3902 # Specify what files to not compare during bootstrap.
3903
3904 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3905 case "$target" in
3906   hppa*64*-*-hpux*) ;;
3907   hppa*-*-hpux*) compare_exclusions="$compare_exclusions | */libgcc/lib2funcs* | gcc/function-tests.o" ;;
3908   powerpc*-ibm-aix*) compare_exclusions="$compare_exclusions | *libgomp*\$(objext)" ;;
3909 esac
3910 AC_SUBST(compare_exclusions)
3911
3912 AC_CONFIG_FILES([Makefile],
3913   [sed "$extrasub_build" Makefile |
3914    sed "$extrasub_host" |
3915    sed "$extrasub_target" > mf$$
3916    mv -f mf$$ Makefile],
3917   [extrasub_build="$extrasub_build"
3918    extrasub_host="$extrasub_host"
3919    extrasub_target="$extrasub_target"])
3920 AC_OUTPUT