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, 2020 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([libtool.m4])
  28 m4_include([ltoptions.m4])
  29 m4_include([ltsugar.m4])
  30 m4_include([ltversion.m4])
  31 m4_include([lt~obsolete.m4])
  32 m4_include([config/isl.m4])
  33
  34 AC_INIT(move-if-change)
  35 AC_DISABLE_OPTION_CHECKING
  36
  37 progname=$0
  38 # if PWD already has a value, it is probably wrong.
  39 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  40
  41 # Export original configure arguments for use by sub-configures.
  42 # Quote arguments with shell meta charatcers.
  43 TOPLEVEL_CONFIGURE_ARGUMENTS=
  44 set -- "$progname" "$@"
  45 for ac_arg
  46 do
  47   case "$ac_arg" in
  48   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  49     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  50     # if the argument is of the form -foo=baz, quote the baz part only
  51     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  52   *) ;;
  53   esac
  54   # Add the quoted argument to the list.
  55   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  56 done
  57 if test "$silent" = yes; then
  58   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  59 fi
  60 # Remove the initial space we just introduced and, as these will be
  61 # expanded by make, quote '$'.
  62 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  63 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  64
  65 # Find the build, host, and target systems.
  66 ACX_NONCANONICAL_BUILD
  67 ACX_NONCANONICAL_HOST
  68 ACX_NONCANONICAL_TARGET
  69
  70 dnl Autoconf 2.5x and later will set a default program prefix if
  71 dnl --target was used, even if it was the same as --host.  Disable
  72 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  73 dnl to take effect.
  74 test "$host_noncanonical" = "$target_noncanonical" &&
  75   test "$program_prefix$program_suffix$program_transform_name" = \
  76     NONENONEs,x,x, &&
  77   program_transform_name=s,y,y,
  78
  79 AC_CANONICAL_SYSTEM
  80 AC_ARG_PROGRAM
  81
  82 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  83 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  84
  85 # Get 'install' or 'install-sh' and its variants.
  86 AC_PROG_INSTALL
  87 ACX_PROG_LN
  88 AC_PROG_LN_S
  89 AC_PROG_SED
  90 AC_PROG_AWK
  91
  92 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  93
  94 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  95 # a relative path.
  96 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  97   INSTALL="${srcpwd}/install-sh -c"
  98 fi
  99
 100 # Set srcdir to "." if that's what it is.
 101 # This is important for multilib support.
 102 pwd=`${PWDCMD-pwd}`
 103 if test "${pwd}" = "${srcpwd}" ; then
 104   srcdir=.
 105 fi
 106
 107 topsrcdir=$srcpwd
 108
 109 extra_host_args=
 110
 111 ### To add a new directory to the tree, first choose whether it is a target
 112 ### or a host dependent tool.  Then put it into the appropriate list
 113 ### (library or tools, host or target), doing a dependency sort.
 114
 115 # Subdirs will be configured in the order listed in build_configdirs,
 116 # configdirs, or target_configdirs; see the serialization section below.
 117
 118 # Dependency sorting is only needed when *configuration* must be done in
 119 # a particular order.  In all cases a dependency should be specified in
 120 # the Makefile, whether or not it's implicitly specified here.
 121
 122 # Double entries in build_configdirs, configdirs, or target_configdirs may
 123 # cause circular dependencies and break everything horribly.
 124
 125 # these library is used by various programs built for the build
 126 # environment
 127 #
 128 build_libs="build-libiberty build-libcpp"
 129
 130 # these tools are built for the build environment
 131 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 132
 133 # these libraries are used by various programs built for the host environment
 134 #f
 135 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libdecnumber gmp mpfr mpc isl libelf libiconv libctf"
 136
 137 # these tools are built for the host environment
 138 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 139 # know that we are building the simulator.
 140 # binutils, gas and ld appear in that order because it makes sense to run
 141 # "make check" in that particular order.
 142 # If --enable-gold is used, "gold" may replace "ld".
 143 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gdbserver gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools"
 144
 145 # these libraries are built for the target environment, and are built after
 146 # the host libraries and the host tools (which may be a cross compiler)
 147 # Note that libiberty is not a target library.
 148 target_libraries="target-libgcc \
 149                 target-libbacktrace \
 150                 target-libgloss \
 151                 target-newlib \
 152                 target-libgomp \
 153                 target-liboffloadmic \
 154                 target-libhsail-rt \
 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
 168 # these tools are built using the target libraries, and are intended to
 169 # run only in the target environment
 170 #
 171 # note: any program that *uses* libraries that are in the "target_libraries"
 172 # list belongs in this list.
 173 #
 174 target_tools="target-rda"
 175
 176 ################################################################################
 177
 178 ## All tools belong in one of the four categories, and are assigned above
 179 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 180 ## is important because configure will choke if they ever get through.
 181 ## ${configdirs} is directories we build using the host tools.
 182 ## ${target_configdirs} is directories we build using the target tools.
 183 configdirs=`echo ${host_libs} ${host_tools}`
 184 target_configdirs=`echo ${target_libraries} ${target_tools}`
 185 build_configdirs=`echo ${build_libs} ${build_tools}`
 186
 187 m4_divert_text([PARSE_ARGS],
 188 [case $srcdir in
 189   *" "*)
 190 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 191     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 192 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 193     ;;
 194 esac
 195 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 196 ])
 197
 198 ################################################################################
 199
 200 srcname="gnu development package"
 201
 202 # This gets set non-empty for some net releases of packages.
 203 appdirs=""
 204
 205 # Define is_cross_compiler to save on calls to 'test'.
 206 is_cross_compiler=
 207 if test x"${host}" = x"${target}" ; then
 208   is_cross_compiler=no
 209 else
 210   is_cross_compiler=yes
 211 fi
 212
 213 # Find the build and target subdir names.
 214 GCC_TOPLEV_SUBDIRS
 215 # Be sure to cover against remnants of an in-tree build.
 216 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 217   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 218 Use a pristine source tree when building in a separate tree])
 219 fi
 220
 221 # Skipdirs are removed silently.
 222 skipdirs=
 223 # Noconfigdirs are removed loudly.
 224 noconfigdirs=""
 225
 226 use_gnu_ld=
 227 # Make sure we don't let GNU ld be added if we didn't want it.
 228 if test x$with_gnu_ld = xno ; then
 229   use_gnu_ld=no
 230   noconfigdirs="$noconfigdirs ld gold"
 231 fi
 232
 233 use_gnu_as=
 234 # Make sure we don't let GNU as be added if we didn't want it.
 235 if test x$with_gnu_as = xno ; then
 236   use_gnu_as=no
 237   noconfigdirs="$noconfigdirs gas"
 238 fi
 239
 240 use_included_zlib=
 241 AC_ARG_WITH(system-zlib,
 242 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 243 # Make sure we don't let ZLIB be added if we didn't want it.
 244 if test x$with_system_zlib = xyes ; then
 245   use_included_zlib=no
 246   noconfigdirs="$noconfigdirs zlib"
 247 fi
 248
 249 AC_ARG_WITH(zstd,
 250 [AS_HELP_STRING([--with-zstd], [Support zstd compressed debug sections (default=auto)])])
 251
 252 # Don't compile the bundled readline/libreadline.a if --with-system-readline
 253 # is provided.
 254 if test x$with_system_readline = xyes ; then
 255   noconfigdirs="$noconfigdirs readline"
 256 fi
 257
 258 # some tools are so dependent upon X11 that if we're not building with X,
 259 # it's not even worth trying to configure, much less build, that tool.
 260
 261 case ${with_x} in
 262   yes | "") ;; # the default value for this tree is that X11 is available
 263   no)
 264     skipdirs="${skipdirs} tk itcl libgui"
 265     # We won't be able to build gdbtk without X.
 266     enable_gdbtk=no
 267     ;;
 268   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 269 esac
 270
 271 # Some are only suitable for cross toolchains.
 272 # Remove these if host=target.
 273 cross_only="target-libgloss target-newlib target-opcodes"
 274
 275 case $is_cross_compiler in
 276   no) skipdirs="${skipdirs} ${cross_only}" ;;
 277 esac
 278
 279 # If both --with-headers and --with-libs are specified, default to
 280 # --without-newlib.
 281 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 282    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 283   if test x"${with_newlib}" = x ; then
 284     with_newlib=no
 285   fi
 286 fi
 287
 288 # Recognize --with-newlib/--without-newlib.
 289 case ${with_newlib} in
 290   no) skipdirs="${skipdirs} target-newlib" ;;
 291   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 292 esac
 293
 294 AC_ARG_ENABLE(as-accelerator-for,
 295 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 296                 [build as offload target compiler.
 297                 Specify offload host triple by ARG])])
 298
 299 AC_ARG_ENABLE(offload-targets,
 300 [AS_HELP_STRING([--enable-offload-targets=LIST],
 301                 [enable offloading to devices from comma-separated LIST of
 302                 TARGET[=DIR]. Use optional path to find offload target compiler
 303                 during the build])],
 304 [
 305   if test x"$enable_offload_targets" = x; then
 306     AC_MSG_ERROR([no offload targets specified])
 307   fi
 308 ], [enable_offload_targets=])
 309
 310 # Handle --enable-gold, --enable-ld.
 311 # --disable-gold [--enable-ld]
 312 #     Build only ld.  Default option.
 313 # --enable-gold [--enable-ld]
 314 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 315 #     as "ld.bfd" and "ld".
 316 # --enable-gold=default [--enable-ld]
 317 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 318 #     install ld as "ld.bfd".
 319 # --enable-gold[=default] --disable-ld
 320 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 321 # --enable-gold --enable-ld=default
 322 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 323 #     and ld.bfd).
 324 #     In other words, ld is default
 325 # --enable-gold=default --enable-ld=default
 326 #     Error.
 327
 328 default_ld=
 329 AC_ARG_ENABLE(gold,
 330 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 331                 [build gold @<:@ARG={default,yes,no}@:>@])],
 332 ENABLE_GOLD=$enableval,
 333 ENABLE_GOLD=no)
 334 case "${ENABLE_GOLD}" in
 335   yes|default)
 336     # Check for ELF target.
 337     is_elf=no
 338     case "${target}" in
 339       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 340       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 341       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 342       | *-*-solaris2* | *-*-nto* | *-*-nacl* | *-*-haiku*)
 343         case "${target}" in
 344           *-*-linux*aout* | *-*-linux*oldld*)
 345             ;;
 346           *)
 347             is_elf=yes
 348             ;;
 349         esac
 350     esac
 351
 352     if test "$is_elf" = "yes"; then
 353       # Check for target supported by gold.
 354       case "${target}" in
 355         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 356         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-*)
 357           configdirs="$configdirs gold"
 358           if test x${ENABLE_GOLD} = xdefault; then
 359             default_ld=gold
 360           fi
 361           ENABLE_GOLD=yes
 362           ;;
 363       esac
 364     fi
 365     ;;
 366   no)
 367     ;;
 368   *)
 369     AC_MSG_ERROR([invalid --enable-gold argument])
 370     ;;
 371 esac
 372
 373 AC_ARG_ENABLE(ld,
 374 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 375                 [build ld @<:@ARG={default,yes,no}@:>@])],
 376 ENABLE_LD=$enableval,
 377 ENABLE_LD=yes)
 378
 379 case "${ENABLE_LD}" in
 380   default)
 381     if test x${default_ld} != x; then
 382       AC_MSG_ERROR([either gold or ld can be the default ld])
 383     fi
 384     ;;
 385   yes)
 386     ;;
 387   no)
 388     if test x${ENABLE_GOLD} != xyes; then
 389       AC_MSG_WARN([neither ld nor gold are enabled])
 390     fi
 391     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 392     ;;
 393   *)
 394     AC_MSG_ERROR([invalid --enable-ld argument])
 395     ;;
 396 esac
 397
 398 AC_ARG_ENABLE(gprofng,
 399 [AS_HELP_STRING([[--enable-gprofng[=ARG]]],
 400                 [build gprofng @<:@ARG={yes,no}@:>@])],
 401 enable_gprofng=$enableval,
 402 enable_gprofng=yes)
 403 if test "$enable_gprofng" = "yes"; then
 404   case "${target}" in
 405     x86_64-*-linux* | i?86-*-linux* | aarch64-*-linux*)
 406     configdirs="$configdirs gprofng"
 407     ;;
 408   esac
 409 fi
 410
 411
 412 # PR gas/19109
 413 # Decide the default method for compressing debug sections.
 414 # Provide a configure time option to override our default.
 415 AC_ARG_ENABLE(compressed_debug_sections,
 416 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 417                 [Enable compressed debug sections for gas, gold or ld by
 418                  default])],
 419 [
 420   if test x"$enable_compressed_debug_sections" = xyes; then
 421     AC_MSG_ERROR([no program with compressed debug sections specified])
 422   fi
 423 ], [enable_compressed_debug_sections=])
 424
 425 # Configure extra directories which are host specific
 426
 427 case "${host}" in
 428   *-cygwin*)
 429     configdirs="$configdirs libtermcap" ;;
 430 esac
 431
 432 # A target can indicate whether a language isn't supported for some reason.
 433 # Only spaces may be used in this macro; not newlines or tabs.
 434 unsupported_languages=
 435
 436 # Remove more programs from consideration, based on the host or
 437 # target this usually means that a port of the program doesn't
 438 # exist yet.
 439
 440 case "${host}" in
 441   i[[3456789]]86-*-msdosdjgpp*)
 442     noconfigdirs="$noconfigdirs tcl tk itcl"
 443     ;;
 444 esac
 445
 446 # Default to --disable-year2038 until we can handle differences between
 447 # projects that use gnulib (which understands year 2038) and projects that
 448 # do not (like BFD).
 449 AC_ARG_ENABLE(year2038,
 450 AS_HELP_STRING([--enable-year2038],
 451   [enable support for timestamps past the year 2038]),
 452 ENABLE_YEAR2038=$enableval,
 453 ENABLE_YEAR2038=no)
 454 enable_year2038=
 455 if test "${ENABLE_YEAR2038}" = "no" ; then
 456   enable_year2038=no
 457 fi
 458
 459 AC_ARG_ENABLE(libquadmath,
 460 AS_HELP_STRING([--disable-libquadmath],
 461   [do not build libquadmath directory]),
 462 ENABLE_LIBQUADMATH=$enableval,
 463 ENABLE_LIBQUADMATH=yes)
 464 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 465   noconfigdirs="$noconfigdirs target-libquadmath"
 466 fi
 467
 468
 469 AC_ARG_ENABLE(libquadmath-support,
 470 AS_HELP_STRING([--disable-libquadmath-support],
 471   [disable libquadmath support for Fortran]),
 472 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 473 ENABLE_LIBQUADMATH_SUPPORT=yes)
 474 enable_libquadmath_support=
 475 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 476   enable_libquadmath_support=no
 477 fi
 478
 479
 480 AC_ARG_ENABLE(libada,
 481 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 482 ENABLE_LIBADA=$enableval,
 483 ENABLE_LIBADA=yes)
 484 if test "${ENABLE_LIBADA}" != "yes" ; then
 485   noconfigdirs="$noconfigdirs gnattools"
 486 fi
 487
 488 AC_ARG_ENABLE(libssp,
 489 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 490 ENABLE_LIBSSP=$enableval,
 491 ENABLE_LIBSSP=yes)
 492
 493 AC_ARG_ENABLE(libstdcxx,
 494 AS_HELP_STRING([--disable-libstdcxx],
 495   [do not build libstdc++-v3 directory]),
 496 ENABLE_LIBSTDCXX=$enableval,
 497 ENABLE_LIBSTDCXX=default)
 498 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 499   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 500 fi]
 501
 502 # If this is accelerator compiler and its target is intelmic we enable
 503 # target liboffloadmic by default.  If this is compiler with offloading
 504 # for intelmic we enable host liboffloadmic by default.  Otherwise
 505 # liboffloadmic is disabled by default.
 506 AC_ARG_ENABLE([liboffloadmic],
 507 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 508                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 509 [case "$enableval" in
 510   no | host | target)
 511     enable_liboffloadmic=$enableval ;;
 512   *)
 513     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 514 esac],
 515 [if test x"$enable_as_accelerator_for" != x; then
 516   case "${target}" in
 517     *-intelmic-* | *-intelmicemul-*)
 518       enable_liboffloadmic=target
 519       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 520       ;;
 521     *)
 522       enable_liboffloadmic=no
 523       ;;
 524   esac
 525 else
 526   case "${enable_offload_targets}" in
 527     *-intelmic-* | *-intelmicemul-*)
 528       enable_liboffloadmic=host
 529       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 530       ;;
 531     *)
 532       enable_liboffloadmic=no
 533       ;;
 534     esac
 535 fi])
 536 AC_SUBST(extra_liboffloadmic_configure_flags)
 537
 538 # Enable libgomp by default on hosted POSIX systems, and a few others.
 539 if test x$enable_libgomp = x ; then
 540     case "${target}" in
 541     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 542         ;;
 543     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 544         ;;
 545     *-*-solaris2* | *-*-hpux11*)
 546         ;;
 547     *-*-darwin* | *-*-aix*)
 548         ;;
 549     nvptx*-*-*)
 550         ;;
 551     *)
 552         noconfigdirs="$noconfigdirs target-libgomp"
 553         ;;
 554     esac
 555 fi
 556
 557 # Disable libatomic on unsupported systems.
 558 if test -d ${srcdir}/libatomic; then
 559     if test x$enable_libatomic = x; then
 560         AC_MSG_CHECKING([for libatomic support])
 561         if (srcdir=${srcdir}/libatomic; \
 562                 . ${srcdir}/configure.tgt; \
 563                 test -n "$UNSUPPORTED")
 564         then
 565             AC_MSG_RESULT([no])
 566             noconfigdirs="$noconfigdirs target-libatomic"
 567         else
 568             AC_MSG_RESULT([yes])
 569         fi
 570     fi
 571 fi
 572
 573 # Disable liboffloadmic on unsupported systems.
 574 if test -d ${srcdir}/liboffloadmic; then
 575     if test x$enable_liboffloadmic != xno; then
 576         AC_MSG_CHECKING([for liboffloadmic support])
 577         if (srcdir=${srcdir}/liboffloadmic; \
 578                 . ${srcdir}/configure.tgt; \
 579                 test -n "$UNSUPPORTED")
 580         then
 581             AC_MSG_RESULT([no])
 582             noconfigdirs="$noconfigdirs target-liboffloadmic"
 583         else
 584             AC_MSG_RESULT([yes])
 585         fi
 586     fi
 587 fi
 588
 589 # Disable libitm on unsupported systems.
 590 if test -d ${srcdir}/libitm; then
 591     if test x$enable_libitm = x; then
 592         AC_MSG_CHECKING([for libitm support])
 593         if (srcdir=${srcdir}/libitm; \
 594                 . ${srcdir}/configure.tgt; \
 595                 test -n "$UNSUPPORTED")
 596         then
 597             AC_MSG_RESULT([no])
 598             noconfigdirs="$noconfigdirs target-libitm"
 599         else
 600             AC_MSG_RESULT([yes])
 601         fi
 602     fi
 603 fi
 604
 605 # Disable libsanitizer on unsupported systems.
 606 if test -d ${srcdir}/libsanitizer; then
 607     if test x$enable_libsanitizer = x; then
 608         AC_MSG_CHECKING([for libsanitizer support])
 609         if (srcdir=${srcdir}/libsanitizer; \
 610                 . ${srcdir}/configure.tgt; \
 611                 test -n "$UNSUPPORTED")
 612         then
 613             AC_MSG_RESULT([no])
 614             noconfigdirs="$noconfigdirs target-libsanitizer"
 615         else
 616             AC_MSG_RESULT([yes])
 617         fi
 618     fi
 619 fi
 620
 621 # Disable libvtv on unsupported systems.
 622 if test -d ${srcdir}/libvtv; then
 623     if test x$enable_libvtv = x; then
 624         AC_MSG_CHECKING([for libvtv support])
 625         if (srcdir=${srcdir}/libvtv; \
 626                 . ${srcdir}/configure.tgt; \
 627                 test "$VTV_SUPPORTED" != "yes")
 628         then
 629             AC_MSG_RESULT([no])
 630             noconfigdirs="$noconfigdirs target-libvtv"
 631         else
 632             AC_MSG_RESULT([yes])
 633         fi
 634     fi
 635 fi
 636
 637
 638 # Disable libhsail-rt on unsupported systems.
 639 if test -d ${srcdir}/libhsail-rt; then
 640     if test x$enable_libhsail_rt = x; then
 641         AC_MSG_CHECKING([for libhsail-rt support])
 642         if (srcdir=${srcdir}/libhsail-rt; \
 643                 . ${srcdir}/configure.tgt; \
 644                 test -n "$UNSUPPORTED")
 645         then
 646             AC_MSG_RESULT([no])
 647             unsupported_languages="$unsupported_languages brig"
 648             # This implicitly disables also target-libhsail-rt as it won't
 649             # get added to the build without BRIG FE.
 650         else
 651             AC_MSG_RESULT([yes])
 652         fi
 653     fi
 654 fi
 655
 656
 657 # Disable libquadmath for some systems.
 658 case "${target}" in
 659   avr-*-*)
 660     noconfigdirs="$noconfigdirs target-libquadmath"
 661     ;;
 662   # libquadmath is unused on AIX and libquadmath build process use of
 663   # LD_LIBRARY_PATH can break AIX bootstrap.
 664   powerpc-*-aix* | rs6000-*-aix*)
 665     noconfigdirs="$noconfigdirs target-libquadmath"
 666     ;;
 667 esac
 668
 669 # Disable libssp for some systems.
 670 case "${target}" in
 671   avr-*-*)
 672     # No hosted I/O support.
 673     noconfigdirs="$noconfigdirs target-libssp"
 674     ;;
 675   powerpc-*-aix* | rs6000-*-aix*)
 676     noconfigdirs="$noconfigdirs target-libssp"
 677     ;;
 678   rl78-*-*)
 679     # libssp uses a misaligned load to trigger a fault, but the RL78
 680     # doesn't fault for those - instead, it gives a build-time error
 681     # for explicit misaligned loads.
 682     noconfigdirs="$noconfigdirs target-libssp"
 683     ;;
 684   visium-*-*)
 685     # No hosted I/O support.
 686     noconfigdirs="$noconfigdirs target-libssp"
 687     ;;
 688 esac
 689
 690 # Disable libstdc++-v3 for some systems.
 691 # Allow user to override this if they pass --enable-libstdc++-v3
 692 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 693   case "${target}" in
 694     *-*-vxworks*)
 695       # VxWorks uses the Dinkumware C++ library.
 696       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 697       ;;
 698     arm*-wince-pe*)
 699       # the C++ libraries don't build on top of CE's C libraries
 700       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 701       ;;
 702     avr-*-*)
 703       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 704       ;;
 705     ft32-*-*)
 706       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 707       ;;
 708   esac
 709 fi
 710
 711 # Disable Fortran for some systems.
 712 case "${target}" in
 713   mmix-*-*)
 714     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 715     unsupported_languages="$unsupported_languages fortran"
 716     ;;
 717 esac
 718
 719 # Disable libffi for some systems.
 720 case "${target}" in
 721   powerpc-*-darwin*)
 722     ;;
 723   i[[3456789]]86-*-darwin*)
 724     ;;
 725   x86_64-*-darwin[[912]]*)
 726     ;;
 727   *-*-darwin*)
 728     noconfigdirs="$noconfigdirs target-libffi"
 729     ;;
 730   *-*-netware*)
 731     noconfigdirs="$noconfigdirs target-libffi"
 732     ;;
 733   *-*-phoenix*)
 734     noconfigdirs="$noconfigdirs target-libffi"
 735     ;;
 736   *-*-rtems*)
 737     noconfigdirs="$noconfigdirs target-libffi"
 738     ;;
 739   *-*-tpf*)
 740     noconfigdirs="$noconfigdirs target-libffi"
 741     ;;
 742   *-*-uclinux*)
 743     noconfigdirs="$noconfigdirs target-libffi"
 744     ;;
 745   *-*-vxworks*)
 746     noconfigdirs="$noconfigdirs target-libffi"
 747     ;;
 748   aarch64*-*-freebsd*)
 749     noconfigdirs="$noconfigdirs target-libffi"
 750     ;;
 751   alpha*-*-*vms*)
 752     noconfigdirs="$noconfigdirs target-libffi"
 753     ;;
 754   arm*-*-freebsd*)
 755     noconfigdirs="$noconfigdirs target-libffi"
 756     ;;
 757   arm-wince-pe)
 758     noconfigdirs="$noconfigdirs target-libffi"
 759     ;;
 760   cris-*-* | crisv32-*-*)
 761     case "${target}" in
 762       *-*-linux*)
 763         ;;
 764       *) # See PR46792 regarding target-libffi.
 765         noconfigdirs="$noconfigdirs target-libffi";;
 766     esac
 767     ;;
 768   hppa*64*-*-hpux*)
 769     noconfigdirs="$noconfigdirs target-libffi"
 770     ;;
 771   hppa*-hp-hpux11*)
 772     ;;
 773   hppa*-*-hpux*)
 774     noconfigdirs="$noconfigdirs target-libffi"
 775     ;;
 776   ia64*-*-*vms*)
 777     noconfigdirs="$noconfigdirs target-libffi"
 778     ;;
 779   i[[3456789]]86-w64-mingw*)
 780     noconfigdirs="$noconfigdirs target-libffi"
 781     ;;
 782   i[[3456789]]86-*-mingw*)
 783     noconfigdirs="$noconfigdirs target-libffi"
 784     ;;
 785   x86_64-*-mingw*)
 786     noconfigdirs="$noconfigdirs target-libffi"
 787     ;;
 788   mmix-*-*)
 789     noconfigdirs="$noconfigdirs target-libffi"
 790     ;;
 791   powerpc-*-aix*)
 792     ;;
 793   rs6000-*-aix*)
 794     ;;
 795   ft32-*-*)
 796     noconfigdirs="$noconfigdirs target-libffi"
 797     ;;
 798   *-*-lynxos*)
 799     noconfigdirs="$noconfigdirs target-libffi"
 800     ;;
 801 esac
 802
 803 # Disable the go frontend on systems where it is known to not work. Please keep
 804 # this in sync with contrib/config-list.mk.
 805 case "${target}" in
 806 *-*-darwin* | *-*-cygwin* | *-*-mingw*)
 807     unsupported_languages="$unsupported_languages go"
 808     ;;
 809 esac
 810
 811 # Only allow gdbserver on some systems.
 812 if test -d ${srcdir}/gdbserver; then
 813     if test x$enable_gdbserver = x; then
 814         AC_MSG_CHECKING([for gdbserver support])
 815         if (srcdir=${srcdir}/gdbserver; \
 816                 . ${srcdir}/configure.srv; \
 817                 test -n "$UNSUPPORTED")
 818         then
 819             AC_MSG_RESULT([no])
 820             noconfigdirs="$noconfigdirs gdbserver"
 821         else
 822             AC_MSG_RESULT([yes])
 823         fi
 824     fi
 825 fi
 826
 827 # Disable libgo for some systems where it is known to not work.
 828 # For testing, you can easily override this with --enable-libgo.
 829 if test x$enable_libgo = x; then
 830     case "${target}" in
 831     *-*-darwin*)
 832         # PR 46986
 833         noconfigdirs="$noconfigdirs target-libgo"
 834         ;;
 835     *-*-cygwin* | *-*-mingw*)
 836         noconfigdirs="$noconfigdirs target-libgo"
 837         ;;
 838     esac
 839 fi
 840
 841 # Default libgloss CPU subdirectory.
 842 libgloss_dir="$target_cpu"
 843
 844 case "${target}" in
 845   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 846     libgloss_dir=wince
 847     ;;
 848   aarch64*-*-* )
 849     libgloss_dir=aarch64
 850     ;;
 851   arm*-*-*)
 852     libgloss_dir=arm
 853     ;;
 854   cris-*-* | crisv32-*-*)
 855     libgloss_dir=cris
 856     ;;
 857   hppa*-*-*)
 858     libgloss_dir=pa
 859     ;;
 860   i[[3456789]]86-*-*)
 861     libgloss_dir=i386
 862     ;;
 863   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 864     libgloss_dir=m68hc11
 865     ;;
 866   m68*-*-* | fido-*-*)
 867     libgloss_dir=m68k
 868     ;;
 869   mips*-*-*)
 870     libgloss_dir=mips
 871     ;;
 872   powerpc*-*-*)
 873     libgloss_dir=rs6000
 874     ;;
 875   sparc*-*-*)
 876     libgloss_dir=sparc
 877     ;;
 878 esac
 879
 880 # Disable newlib and libgloss for various target OSes.
 881 case "${target}" in
 882   alpha*-dec-osf*)
 883     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 884     ;;
 885   i[[3456789]]86-*-linux*)
 886     # This section makes it possible to build newlib natively on linux.
 887     # If we are using a cross compiler then don't configure newlib.
 888     if test x${is_cross_compiler} != xno ; then
 889       noconfigdirs="$noconfigdirs target-newlib"
 890     fi
 891     noconfigdirs="$noconfigdirs target-libgloss"
 892     # If we are not using a cross compiler, do configure newlib.
 893     # Note however, that newlib will only be configured in this situation
 894     # if the --with-newlib option has been given, because otherwise
 895     # 'target-newlib' will appear in skipdirs.
 896     ;;
 897   i[[3456789]]86-*-rdos*)
 898     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 899     ;;
 900   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 901     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 902     ;;
 903   sparc-*-sunos4*)
 904     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 905     ;;
 906   *-*-aix*)
 907     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 908     ;;
 909   *-*-beos*)
 910     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 911     ;;
 912   *-*-chorusos)
 913     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 914     ;;
 915   *-*-dragonfly*)
 916     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 917     ;;
 918   *-*-freebsd*)
 919     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 920     ;;
 921   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 922     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 923     ;;
 924   *-*-lynxos*)
 925     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 926     ;;
 927   *-*-mingw*)
 928     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 929     ;;
 930   *-*-netbsd*)
 931     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 932     ;;
 933   *-*-netware*)
 934     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 935     ;;
 936   *-*-tpf*)
 937     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 938     ;;
 939   *-*-uclinux*)
 940     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 941     ;;
 942   *-*-vxworks*)
 943     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 944     ;;
 945 esac
 946
 947 case "${target}" in
 948   *-*-chorusos)
 949     ;;
 950   aarch64-*-darwin*)
 951     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 952     noconfigdirs="$noconfigdirs sim target-rda"
 953     ;;
 954   arm-*-darwin*)
 955     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 956     noconfigdirs="$noconfigdirs sim target-rda"
 957     ;;
 958   powerpc-*-darwin*)
 959     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 960     noconfigdirs="$noconfigdirs sim target-rda"
 961     ;;
 962   i[[3456789]]86-*-darwin*)
 963     noconfigdirs="$noconfigdirs ld gprof"
 964     noconfigdirs="$noconfigdirs sim target-rda"
 965     ;;
 966   x86_64-*-darwin[[912]]*)
 967     noconfigdirs="$noconfigdirs ld gas gprof"
 968     noconfigdirs="$noconfigdirs sim target-rda"
 969     ;;
 970   *-*-darwin*)
 971     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 972     noconfigdirs="$noconfigdirs sim target-rda"
 973     ;;
 974   *-*-dragonfly*)
 975     ;;
 976   *-*-freebsd*)
 977     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
 978         && test -f /usr/local/include/gmp.h; then
 979       with_gmp=/usr/local
 980     fi
 981     ;;
 982   *-*-kaos*)
 983     # Remove unsupported stuff on all kaOS configurations.
 984     noconfigdirs="$noconfigdirs target-libgloss"
 985     ;;
 986   *-*-netbsd*)
 987     ;;
 988   *-*-netware*)
 989     ;;
 990   *-*-phoenix*)
 991     noconfigdirs="$noconfigdirs target-libgloss"
 992     ;;
 993   *-*-rtems*)
 994     noconfigdirs="$noconfigdirs target-libgloss"
 995     ;;
 996     # The tpf target doesn't support gdb yet.
 997   *-*-tpf*)
 998     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
 999     ;;
1000   *-*-uclinux*)
1001     noconfigdirs="$noconfigdirs target-rda"
1002     ;;
1003   *-*-vxworks*)
1004     ;;
1005   alpha*-dec-osf*)
1006     # ld works, but does not support shared libraries.
1007     # gas doesn't generate exception information.
1008     noconfigdirs="$noconfigdirs gas ld"
1009     ;;
1010   alpha*-*-*vms*)
1011     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1012     ;;
1013   alpha*-*-*)
1014     # newlib is not 64 bit ready
1015     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1016     ;;
1017   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1018     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1019     ;;
1020   arc*-*-*)
1021     noconfigdirs="$noconfigdirs sim"
1022     ;;
1023   arm-*-pe*)
1024     noconfigdirs="$noconfigdirs target-libgloss"
1025     ;;
1026   arm-*-riscix*)
1027     noconfigdirs="$noconfigdirs ld target-libgloss"
1028     ;;
1029   avr-*-*)
1030     if test x${with_avrlibc} != xno; then
1031       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1032     fi
1033     ;;
1034   c4x-*-* | tic4x-*-*)
1035     noconfigdirs="$noconfigdirs target-libgloss"
1036     ;;
1037   tic54x-*-*)
1038     noconfigdirs="$noconfigdirs target-libgloss gdb"
1039     ;;
1040   d10v-*-*)
1041     noconfigdirs="$noconfigdirs target-libgloss"
1042     ;;
1043   d30v-*-*)
1044     noconfigdirs="$noconfigdirs gdb"
1045     ;;
1046   fr30-*-elf*)
1047     noconfigdirs="$noconfigdirs gdb"
1048     ;;
1049   ft32-*-*)
1050     noconfigdirs="$noconfigdirs target-rda gprof"
1051     ;;
1052   moxie-*-*)
1053     noconfigdirs="$noconfigdirs"
1054     ;;
1055   h8300*-*-*)
1056     noconfigdirs="$noconfigdirs target-libgloss"
1057     ;;
1058   h8500-*-*)
1059     noconfigdirs="$noconfigdirs target-libgloss"
1060     ;;
1061   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1062     ;;
1063   hppa*64*-*-hpux*)
1064     noconfigdirs="$noconfigdirs gdb"
1065     ;;
1066   hppa*-*-hpux11*)
1067     noconfigdirs="$noconfigdirs gdb ld"
1068     ;;
1069   hppa*64*-*-linux*)
1070     ;;
1071   hppa*-*-linux*)
1072     ;;
1073   hppa*-*-*elf* | \
1074   hppa*-*-lites* | \
1075   hppa*-*-openbsd* | \
1076   hppa*64*-*-*)
1077     ;;
1078   hppa*-*-pro*)
1079     ;;
1080   hppa*-*-*)
1081     noconfigdirs="$noconfigdirs ld"
1082     ;;
1083   i960-*-*)
1084     noconfigdirs="$noconfigdirs gdb"
1085     ;;
1086   ia64*-*-elf*)
1087     # No gdb support yet.
1088     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1089     ;;
1090   ia64*-**-hpux*)
1091     # No ld support yet.
1092     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1093     ;;
1094   ia64*-*-*vms*)
1095     # No ld support yet.
1096     noconfigdirs="$noconfigdirs libgui itcl ld"
1097     ;;
1098   i[[3456789]]86-w64-mingw*)
1099     ;;
1100   i[[3456789]]86-*-mingw*)
1101     target_configdirs="$target_configdirs target-winsup"
1102     ;;
1103   *-*-cygwin*)
1104     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1105     noconfigdirs="$noconfigdirs target-libgloss"
1106     # always build newlib if winsup directory is present.
1107     if test -d "$srcdir/winsup/cygwin"; then
1108       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1109     elif test -d "$srcdir/newlib"; then
1110       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1111     fi
1112     ;;
1113   i[[3456789]]86-*-pe)
1114     noconfigdirs="$noconfigdirs target-libgloss"
1115     ;;
1116   i[[3456789]]86-*-sco3.2v5*)
1117     # The linker does not yet know about weak symbols in COFF,
1118     # and is not configured to handle mixed ELF and COFF.
1119     noconfigdirs="$noconfigdirs ld target-libgloss"
1120     ;;
1121   i[[3456789]]86-*-sco*)
1122     noconfigdirs="$noconfigdirs gprof target-libgloss"
1123     ;;
1124   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1125     noconfigdirs="$noconfigdirs target-libgloss"
1126     ;;
1127   i[[3456789]]86-*-sysv4*)
1128     noconfigdirs="$noconfigdirs target-libgloss"
1129     ;;
1130   i[[3456789]]86-*-beos*)
1131     noconfigdirs="$noconfigdirs gdb"
1132     ;;
1133   i[[3456789]]86-*-rdos*)
1134     noconfigdirs="$noconfigdirs gdb"
1135     ;;
1136   mmix-*-*)
1137     noconfigdirs="$noconfigdirs gdb"
1138     ;;
1139   mt-*-*)
1140     noconfigdirs="$noconfigdirs sim"
1141     ;;
1142   nfp-*-*)
1143     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1144     noconfigdirs="$noconfigdirs $target_libraries"
1145     ;;
1146   pdp11-*-*)
1147     noconfigdirs="$noconfigdirs gdb gprof"
1148     ;;
1149   powerpc-*-aix*)
1150     # copied from rs6000-*-* entry
1151     noconfigdirs="$noconfigdirs gprof"
1152     ;;
1153   powerpc*-*-winnt* | powerpc*-*-pe*)
1154     target_configdirs="$target_configdirs target-winsup"
1155     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1156     # always build newlib.
1157     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1158     ;;
1159     # This is temporary until we can link against shared libraries
1160   powerpcle-*-solaris*)
1161     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1162     ;;
1163   powerpc-*-beos*)
1164     noconfigdirs="$noconfigdirs gdb"
1165     ;;
1166   rs6000-*-lynxos*)
1167     noconfigdirs="$noconfigdirs gprof"
1168     ;;
1169   rs6000-*-aix*)
1170     noconfigdirs="$noconfigdirs gprof"
1171     ;;
1172   rs6000-*-*)
1173     noconfigdirs="$noconfigdirs gprof"
1174     ;;
1175   m68k-apollo-*)
1176     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1177     ;;
1178   microblaze*)
1179     noconfigdirs="$noconfigdirs gprof"
1180     ;;
1181   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1182     if test x$with_newlib = xyes; then
1183       noconfigdirs="$noconfigdirs gprof"
1184     fi
1185     ;;
1186   mips*-*-irix5*)
1187     noconfigdirs="$noconfigdirs gprof target-libgloss"
1188     ;;
1189   mips*-*-irix6*)
1190     noconfigdirs="$noconfigdirs gprof target-libgloss"
1191     ;;
1192   mips*-*-bsd*)
1193     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1194     ;;
1195   mips*-*-linux*)
1196     ;;
1197   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1198   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1199     noconfigdirs="$noconfigdirs ld gas gprof"
1200     ;;
1201   mips*-*-*)
1202     noconfigdirs="$noconfigdirs gprof"
1203     ;;
1204   nvptx*-*-*)
1205     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1206     ;;
1207   sh-*-*)
1208     case "${target}" in
1209       sh*-*-elf)
1210          ;;
1211       *)
1212          noconfigdirs="$noconfigdirs target-libgloss" ;;
1213     esac
1214     ;;
1215   sparc-*-sunos4*)
1216     if test x${is_cross_compiler} = xno ; then
1217            use_gnu_ld=no
1218     fi
1219     ;;
1220   tic6x-*-*)
1221     noconfigdirs="$noconfigdirs sim"
1222     ;;
1223   tilepro*-*-* | tilegx*-*-*)
1224     noconfigdirs="$noconfigdirs sim"
1225     ;;
1226   v810-*-*)
1227     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1228     ;;
1229   vax-*-*)
1230     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1231     ;;
1232   wasm32-*-*)
1233     noconfigdirs="$noconfigdirs ld"
1234     ;;
1235 esac
1236
1237 # If we aren't building newlib, then don't build libgloss, since libgloss
1238 # depends upon some newlib header files.
1239 case "${noconfigdirs}" in
1240   *target-libgloss*) ;;
1241   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1242 esac
1243
1244 # Work in distributions that contain no compiler tools, like Autoconf.
1245 host_makefile_frag=/dev/null
1246 if test -d ${srcdir}/config ; then
1247 case "${host}" in
1248   i[[3456789]]86-*-msdosdjgpp*)
1249     host_makefile_frag="config/mh-djgpp"
1250     ;;
1251   *-cygwin*)
1252     ACX_CHECK_CYGWIN_CAT_WORKS
1253     host_makefile_frag="config/mh-cygwin"
1254     ;;
1255   *-mingw*)
1256     host_makefile_frag="config/mh-mingw"
1257     ;;
1258   alpha*-linux*)
1259     host_makefile_frag="config/mh-alpha-linux"
1260     ;;
1261   hppa*-hp-hpux10*)
1262     host_makefile_frag="config/mh-pa-hpux10"
1263     ;;
1264   hppa*-hp-hpux*)
1265     host_makefile_frag="config/mh-pa"
1266     ;;
1267   hppa*-*)
1268     host_makefile_frag="config/mh-pa"
1269     ;;
1270   *-*-darwin*)
1271     host_makefile_frag="config/mh-darwin"
1272     ;;
1273   powerpc-*-aix*)
1274     host_makefile_frag="config/mh-ppc-aix"
1275     ;;
1276   rs6000-*-aix*)
1277     host_makefile_frag="config/mh-ppc-aix"
1278     ;;
1279 esac
1280 fi
1281
1282 if test "${build}" != "${host}" ; then
1283   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1284   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1285   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1286   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1287   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1288   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1289   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1290   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1291   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1292   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1293   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1294   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1295 else
1296   AR_FOR_BUILD="\$(AR)"
1297   AS_FOR_BUILD="\$(AS)"
1298   CC_FOR_BUILD="\$(CC)"
1299   CXX_FOR_BUILD="\$(CXX)"
1300   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1301   GOC_FOR_BUILD="\$(GOC)"
1302   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1303   LD_FOR_BUILD="\$(LD)"
1304   NM_FOR_BUILD="\$(NM)"
1305   RANLIB_FOR_BUILD="\$(RANLIB)"
1306   WINDRES_FOR_BUILD="\$(WINDRES)"
1307   WINDMC_FOR_BUILD="\$(WINDMC)"
1308 fi
1309
1310 AC_PROG_CC_C99
1311 AC_PROG_CXX
1312
1313 # We must set the default linker to the linker used by gcc for the correct
1314 # operation of libtool.  If LD is not defined and we are using gcc, try to
1315 # set the LD default to the ld used by gcc.
1316 if test -z "$LD"; then
1317   if test "$GCC" = yes; then
1318     case $build in
1319     *-*-mingw*)
1320       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1321     *)
1322       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1323     esac
1324     case $gcc_prog_ld in
1325     # Accept absolute paths.
1326     [[\\/]* | [A-Za-z]:[\\/]*)]
1327       LD="$gcc_prog_ld" ;;
1328     esac
1329   fi
1330 fi
1331
1332 # Check whether -static-libstdc++ -static-libgcc is supported.
1333 have_static_libs=no
1334 if test "$GCC" = yes; then
1335   saved_LDFLAGS="$LDFLAGS"
1336
1337   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1338   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1339   AC_LANG_PUSH(C++)
1340   AC_LINK_IFELSE([AC_LANG_SOURCE([
1341 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1342 #error -static-libstdc++ not implemented
1343 #endif
1344 int main() {}])],
1345     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1346     [AC_MSG_RESULT([no])])
1347   AC_LANG_POP(C++)
1348
1349   LDFLAGS="$saved_LDFLAGS"
1350 fi
1351
1352 ACX_PROG_GNAT
1353 ACX_PROG_CMP_IGNORE_INITIAL
1354
1355 AC_ARG_ENABLE([bootstrap],
1356 [AS_HELP_STRING([--enable-bootstrap],
1357                 [enable bootstrapping @<:@yes if native build@:>@])],,
1358 enable_bootstrap=default)
1359
1360 # Issue errors and warnings for invalid/strange bootstrap combinations.
1361 if test -r $srcdir/gcc/configure; then
1362   have_compiler=yes
1363 else
1364   have_compiler=no
1365 fi
1366
1367 case "$have_compiler:$host:$target:$enable_bootstrap" in
1368   *:*:*:no) ;;
1369
1370   # Default behavior.  Enable bootstrap if we have a compiler
1371   # and we are in a native configuration.
1372   yes:$build:$build:default)
1373     enable_bootstrap=yes ;;
1374
1375   *:*:*:default)
1376     enable_bootstrap=no ;;
1377
1378   # We have a compiler and we are in a native configuration, bootstrap is ok
1379   yes:$build:$build:yes)
1380     ;;
1381
1382   # Other configurations, but we have a compiler.  Assume the user knows
1383   # what he's doing.
1384   yes:*:*:yes)
1385     AC_MSG_WARN([trying to bootstrap a cross compiler])
1386     ;;
1387
1388   # No compiler: if they passed --enable-bootstrap explicitly, fail
1389   no:*:*:yes)
1390     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1391
1392   # Fail if wrong command line
1393   *)
1394     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1395     ;;
1396 esac
1397
1398 # When bootstrapping with GCC, build stage 1 in C++98 mode to ensure that a
1399 # C++98 compiler can still start the bootstrap.
1400 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1401   CXX="$CXX -std=gnu++98"
1402 fi
1403
1404 AC_ARG_ENABLE([pgo-build],
1405 [AS_HELP_STRING([--enable-pgo-build[[=lto]]],
1406                 [enable the PGO build])],
1407 [enable_pgo_build=$enableval],
1408 [enable_pgo_build=no])
1409
1410 # Issue errors and warnings for invalid/strange PGO build combinations.
1411 case "$have_compiler:$host:$target:$enable_pgo_build" in
1412   *:*:*:no) ;;
1413
1414   # Allow the PGO build only if we aren't building a compiler and
1415   # we are in a native configuration.
1416   no:$build:$build:yes | no:$build:$build:lto) ;;
1417
1418   # Disallow the PGO bootstrap if we are building a compiler.
1419   yes:*:*:yes | yes:*:*:lto)
1420     AC_MSG_ERROR([cannot perform the PGO bootstrap when building a compiler]) ;;
1421
1422   *)
1423     AC_MSG_ERROR([invalid option for --enable-pgo-build])
1424     ;;
1425 esac
1426
1427 if test "$enable_pgo_build" != "no"; then
1428   AC_MSG_CHECKING([whether the compiler supports -fprofile-generate])
1429   old_CFLAGS="$CFLAGS"
1430   PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
1431   CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
1432   AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1433                     [PGO_BUILD_GEN_CFLAGS=])
1434   CFLAGS="$old_CFLAGS"
1435   if test -n "$PGO_BUILD_GEN_CFLAGS"; then
1436     AC_MSG_RESULT([yes])
1437     PGO_BUILD_USE_CFLAGS="-fprofile-use"
1438   else
1439     AC_MSG_RESULT([no])
1440     AC_MSG_ERROR([cannot perform the PGO build without -fprofile-generate])
1441   fi
1442
1443   if test "$enable_pgo_build" = "lto"; then
1444     AC_MSG_CHECKING([whether the compiler supports -flto=jobserver -ffat-lto-objects])
1445     old_CFLAGS="$CFLAGS"
1446     PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
1447     CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
1448     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1449                       [PGO_BUILD_LTO_CFLAGS=])
1450     CFLAGS="$old_CFLAGS"
1451     if test -n "$PGO_BUILD_LTO_CFLAGS"; then
1452       AC_MSG_RESULT([yes])
1453     else
1454       AC_MSG_RESULT([no])
1455       AC_MSG_WARN([LTO is disabled for the PGO build])
1456     fi
1457   fi
1458 fi
1459 AC_SUBST(PGO_BUILD_GEN_CFLAGS)
1460 AC_SUBST(PGO_BUILD_USE_CFLAGS)
1461 AC_SUBST(PGO_BUILD_LTO_CFLAGS)
1462
1463 # Used for setting $lt_cv_objdir
1464 _LT_CHECK_OBJDIR
1465
1466 # Check for GMP, MPFR and MPC
1467 gmplibs="-lmpc -lmpfr -lgmp"
1468 gmpinc=
1469 have_gmp=no
1470
1471 # Specify a location for mpc
1472 # check for this first so it ends up on the link line before mpfr.
1473 AC_ARG_WITH(mpc,
1474 [AS_HELP_STRING([--with-mpc=PATH],
1475                 [specify prefix directory for installed MPC package.
1476                  Equivalent to --with-mpc-include=PATH/include
1477                  plus --with-mpc-lib=PATH/lib])])
1478 AC_ARG_WITH(mpc-include,
1479 [AS_HELP_STRING([--with-mpc-include=PATH],
1480                 [specify directory for installed MPC include files])])
1481 AC_ARG_WITH(mpc-lib,
1482 [AS_HELP_STRING([--with-mpc-lib=PATH],
1483                 [specify directory for the installed MPC library])])
1484
1485 if test "x$with_mpc" != x; then
1486   gmplibs="-L$with_mpc/lib $gmplibs"
1487   gmpinc="-I$with_mpc/include $gmpinc"
1488 fi
1489 if test "x$with_mpc_include" != x; then
1490   gmpinc="-I$with_mpc_include $gmpinc"
1491 fi
1492 if test "x$with_mpc_lib" != x; then
1493   gmplibs="-L$with_mpc_lib $gmplibs"
1494 fi
1495 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1496   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1497   gmpinc='-I$$s/mpc/src '"$gmpinc"
1498   # Do not test the mpc version.  Assume that it is sufficient, since
1499   # it is in the source tree, and the library has not been built yet
1500   # but it would be included on the link line in the version check below
1501   # hence making the test fail.
1502   have_gmp=yes
1503 fi
1504
1505 # Specify a location for mpfr
1506 # check for this first so it ends up on the link line before gmp.
1507 AC_ARG_WITH(mpfr-dir,
1508 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1509 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1510 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1511
1512 AC_ARG_WITH(mpfr,
1513 [AS_HELP_STRING([--with-mpfr=PATH],
1514                 [specify prefix directory for installed MPFR package.
1515                  Equivalent to --with-mpfr-include=PATH/include
1516                  plus --with-mpfr-lib=PATH/lib])])
1517 AC_ARG_WITH(mpfr-include,
1518 [AS_HELP_STRING([--with-mpfr-include=PATH],
1519                 [specify directory for installed MPFR include files])])
1520 AC_ARG_WITH(mpfr-lib,
1521 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1522                 [specify directory for the installed MPFR library])])
1523
1524 if test "x$with_mpfr" != x; then
1525   gmplibs="-L$with_mpfr/lib $gmplibs"
1526   gmpinc="-I$with_mpfr/include $gmpinc"
1527 fi
1528 if test "x$with_mpfr_include" != x; then
1529   gmpinc="-I$with_mpfr_include $gmpinc"
1530 fi
1531 if test "x$with_mpfr_lib" != x; then
1532   gmplibs="-L$with_mpfr_lib $gmplibs"
1533 fi
1534 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1535   # MPFR v3.1.0 moved the sources into a src sub-directory.
1536   if ! test -d ${srcdir}/mpfr/src; then
1537     AC_MSG_ERROR([dnl
1538 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1539   fi
1540   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1541   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1542   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1543   # Do not test the mpfr version.  Assume that it is sufficient, since
1544   # it is in the source tree, and the library has not been built yet
1545   # but it would be included on the link line in the version check below
1546   # hence making the test fail.
1547   have_gmp=yes
1548 fi
1549
1550 # Specify a location for gmp
1551 AC_ARG_WITH(gmp-dir,
1552 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1553 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1554 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1555
1556 AC_ARG_WITH(gmp,
1557 [AS_HELP_STRING([--with-gmp=PATH],
1558                 [specify prefix directory for the installed GMP package.
1559                  Equivalent to --with-gmp-include=PATH/include
1560                  plus --with-gmp-lib=PATH/lib])])
1561 AC_ARG_WITH(gmp-include,
1562 [AS_HELP_STRING([--with-gmp-include=PATH],
1563                 [specify directory for installed GMP include files])])
1564 AC_ARG_WITH(gmp-lib,
1565 [AS_HELP_STRING([--with-gmp-lib=PATH],
1566                 [specify directory for the installed GMP library])])
1567
1568
1569 if test "x$with_gmp" != x; then
1570   gmplibs="-L$with_gmp/lib $gmplibs"
1571   gmpinc="-I$with_gmp/include $gmpinc"
1572 fi
1573 if test "x$with_gmp_include" != x; then
1574   gmpinc="-I$with_gmp_include $gmpinc"
1575 fi
1576 if test "x$with_gmp_lib" != x; then
1577   gmplibs="-L$with_gmp_lib $gmplibs"
1578 fi
1579 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1580   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1581   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1582   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1583   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1584   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1585   # Do not test the gmp version.  Assume that it is sufficient, since
1586   # it is in the source tree, and the library has not been built yet
1587   # but it would be included on the link line in the version check below
1588   # hence making the test fail.
1589   have_gmp=yes
1590 fi
1591
1592 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1593   have_gmp=yes
1594   saved_CFLAGS="$CFLAGS"
1595   CFLAGS="$CFLAGS $gmpinc"
1596   # Check for the recommended and required versions of GMP.
1597   AC_MSG_CHECKING([for the correct version of gmp.h])
1598   AC_TRY_COMPILE([#include "gmp.h"],[
1599   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1600   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1601   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1602   choke me
1603   #endif
1604   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1605   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1606   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1607   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1608   choke me
1609   #endif
1610   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1611    [AC_MSG_RESULT([no]); have_gmp=no])
1612
1613   # If we have GMP, check the MPFR version.
1614   if test x"$have_gmp" = xyes; then
1615     # Check for the recommended and required versions of MPFR.
1616     AC_MSG_CHECKING([for the correct version of mpfr.h])
1617     AC_TRY_COMPILE([#include <gmp.h>
1618     #include <mpfr.h>],[
1619     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,0)
1620     choke me
1621     #endif
1622     ], [AC_TRY_COMPILE([#include <gmp.h>
1623     #include <mpfr.h>],[
1624     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,2)
1625     choke me
1626     #endif
1627     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1628      [AC_MSG_RESULT([no]); have_gmp=no])
1629   fi
1630
1631   # Check for the MPC header version.
1632   if test x"$have_gmp" = xyes ; then
1633     # Check for the recommended and required versions of MPC.
1634     AC_MSG_CHECKING([for the correct version of mpc.h])
1635     AC_TRY_COMPILE([#include <mpc.h>],[
1636     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1637     choke me
1638     #endif
1639     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1640     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1641     choke me
1642     #endif
1643     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1644      [AC_MSG_RESULT([no]); have_gmp=no])
1645   fi
1646
1647   # Now check the MPFR library.
1648   if test x"$have_gmp" = xyes; then
1649     saved_LIBS="$LIBS"
1650     LIBS="$LIBS $gmplibs"
1651     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1652     AC_TRY_LINK([#include <mpc.h>],[
1653     mpfr_t n;
1654     mpfr_t x;
1655     mpc_t c;
1656     int t;
1657     mpfr_init (n);
1658     mpfr_init (x);
1659     mpfr_atan2 (n, n, x, GMP_RNDN);
1660     mpfr_erfc (n, x, GMP_RNDN);
1661     mpfr_subnormalize (x, t, GMP_RNDN);
1662     mpfr_clear(n);
1663     mpfr_clear(x);
1664     mpc_init2 (c, 53);
1665     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1666     mpc_cosh (c, c, MPC_RNDNN);
1667     mpc_pow (c, c, c, MPC_RNDNN);
1668     mpc_acosh (c, c, MPC_RNDNN);
1669     mpc_clear (c);
1670     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1671     LIBS="$saved_LIBS"
1672   fi
1673
1674   CFLAGS="$saved_CFLAGS"
1675
1676 # The library versions listed in the error message below should match
1677 # the HARD-minimums enforced above.
1678   if test x$have_gmp != xyes; then
1679     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
1680 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1681 their locations.  Source code for these libraries can be found at
1682 their respective hosting sites as well as at
1683 ftp://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1684 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1685 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1686 make sure that you have installed both the libraries and the header
1687 files.  They may be located in separate packages.])
1688   fi
1689 fi
1690
1691 # Flags needed for both GMP, MPFR and/or MPC.
1692 AC_SUBST(gmplibs)
1693 AC_SUBST(gmpinc)
1694 AC_SUBST(extra_mpfr_configure_flags)
1695 AC_SUBST(extra_mpc_gmp_configure_flags)
1696 AC_SUBST(extra_mpc_mpfr_configure_flags)
1697 AC_SUBST(extra_isl_gmp_configure_flags)
1698
1699 # Libraries to use for stage1 or when not bootstrapping.
1700 AC_ARG_WITH(stage1-libs,
1701 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1702 [if test "$withval" = "no" -o "$withval" = "yes"; then
1703    stage1_libs=
1704  else
1705    stage1_libs=$withval
1706  fi],
1707 [stage1_libs=])
1708 AC_SUBST(stage1_libs)
1709
1710 # Whether or not to use -static-libstdc++ and -static-libgcc.  The
1711 # default is yes if gcc is being built; no otherwise.  The reason for
1712 # this default is that gdb is sometimes linked against GNU Source
1713 # Highlight, which is a shared library that uses C++ exceptions.  In
1714 # this case, -static-libstdc++ will cause crashes.
1715 AC_ARG_WITH(static-standard-libraries,
1716 [AS_HELP_STRING([--with-static-standard-libraries],
1717                 [use -static-libstdc++ and -static-libgcc (default=auto)])],
1718 [], [with_static_standard_libraries=auto])
1719 if test "$with_static_standard_libraries" = auto; then
1720   with_static_standard_libraries=$have_compiler
1721 fi
1722
1723 # Linker flags to use for stage1 or when not bootstrapping.
1724 AC_ARG_WITH(stage1-ldflags,
1725 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1726 [if test "$withval" = "no" -o "$withval" = "yes"; then
1727    stage1_ldflags=
1728  else
1729    stage1_ldflags=$withval
1730  fi],
1731 [stage1_ldflags=
1732  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1733  # if supported.  But if the user explicitly specified the libraries to use,
1734  # trust that they are doing what they want.
1735  if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
1736      -a "$have_static_libs" = yes; then
1737    stage1_ldflags="-static-libstdc++ -static-libgcc"
1738  fi])
1739 AC_SUBST(stage1_ldflags)
1740
1741 # Libraries to use for stage2 and later builds.
1742 AC_ARG_WITH(boot-libs,
1743 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1744 [if test "$withval" = "no" -o "$withval" = "yes"; then
1745    poststage1_libs=
1746  else
1747    poststage1_libs=$withval
1748  fi],
1749 [poststage1_libs=])
1750 AC_SUBST(poststage1_libs)
1751
1752 # Linker flags to use for stage2 and later builds.
1753 AC_ARG_WITH(boot-ldflags,
1754 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1755                 [linker flags for stage2 and later])],
1756 [if test "$withval" = "no" -o "$withval" = "yes"; then
1757    poststage1_ldflags=
1758  else
1759    poststage1_ldflags=$withval
1760  fi],
1761 [poststage1_ldflags=
1762  # In stages 2 and 3, default to linking libstdc++ and libgcc
1763  # statically.  But if the user explicitly specified the libraries to
1764  # use, trust that they are doing what they want.
1765  if test "$poststage1_libs" = ""; then
1766    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1767  fi])
1768 AC_SUBST(poststage1_ldflags)
1769
1770 # GCC GRAPHITE dependency isl.
1771 # Basic setup is inlined here, actual checks are in config/isl.m4
1772
1773 AC_ARG_WITH(isl,
1774   [AS_HELP_STRING(
1775    [--with-isl=PATH],
1776    [Specify prefix directory for the installed isl package.
1777     Equivalent to --with-isl-include=PATH/include
1778     plus --with-isl-lib=PATH/lib])])
1779
1780 # Treat --without-isl as a request to disable
1781 # GRAPHITE support and skip all following checks.
1782 if test "x$with_isl" != "xno"; then
1783   # Check for isl
1784   dnl Provide configure switches and initialize islinc & isllibs
1785   dnl with user input.
1786   ISL_INIT_FLAGS
1787   dnl The versions of isl that work for Graphite
1788   ISL_CHECK_VERSION()
1789   dnl Only execute fail-action, if isl has been requested.
1790   ISL_IF_FAILED([
1791     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1792 fi
1793
1794 # If the isl check failed, disable builds of in-tree variant of isl
1795 if test "x$with_isl" = xno ||
1796    test "x$gcc_cv_isl" = xno; then
1797   noconfigdirs="$noconfigdirs isl"
1798   islinc=
1799 fi
1800
1801 AC_SUBST(isllibs)
1802 AC_SUBST(islinc)
1803
1804 # Check for LTO support.
1805 AC_ARG_ENABLE(lto,
1806 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1807 enable_lto=$enableval,
1808 enable_lto=yes; default_enable_lto=yes)
1809
1810 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1811   build_lto_plugin=yes
1812 ],[if test x"$default_enable_lto" = x"yes" ; then
1813     case $target in
1814       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1815       # On other non-ELF platforms, LTO has yet to be validated.
1816       *) enable_lto=no ;;
1817     esac
1818   else
1819   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1820   # It would also be nice to check the binutils support, but we don't
1821   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1822   # warn during gcc/ subconfigure; unless you're bootstrapping with
1823   # -flto it won't be needed until after installation anyway.
1824     case $target in
1825       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1826       *) if test x"$enable_lto" = x"yes"; then
1827         AC_MSG_ERROR([LTO support is not enabled for this target.])
1828         fi
1829       ;;
1830     esac
1831   fi
1832   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1833   # Build it unless LTO was explicitly disabled.
1834   case $target in
1835     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1836     *) ;;
1837   esac
1838 ])
1839
1840 AC_ARG_ENABLE(linker-plugin-configure-flags,
1841   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1842     [additional flags for configuring linker plugins @<:@none@:>@])],
1843   extra_linker_plugin_configure_flags=$enableval,
1844   extra_linker_plugin_configure_flags=)
1845 AC_SUBST(extra_linker_plugin_configure_flags)
1846 AC_ARG_ENABLE(linker-plugin-flags,
1847   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1848     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1849   extra_linker_plugin_flags=$enableval,
1850   extra_linker_plugin_flags=)
1851 AC_SUBST(extra_linker_plugin_flags)
1852
1853 # Enable --enable-host-shared.
1854 # Checked early to determine whether jit is an 'all' language
1855 AC_ARG_ENABLE(host-shared,
1856 [AS_HELP_STRING([--enable-host-shared],
1857                 [build host code as shared libraries])],
1858 [host_shared=$enableval], [host_shared=no])
1859 AC_SUBST(host_shared)
1860
1861 # By default, C and C++ are the only stage 1 languages.
1862 stage1_languages=,c,
1863
1864 # Target libraries that we bootstrap.
1865 bootstrap_target_libs=,target-libgcc,
1866
1867 # Figure out what language subdirectories are present.
1868 # Look if the user specified --enable-languages="..."; if not, use
1869 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1870 # go away some day.
1871 # NB:  embedded tabs in this IF block -- do not untabify
1872 if test -d ${srcdir}/gcc; then
1873   if test x"${enable_languages+set}" != xset; then
1874     if test x"${LANGUAGES+set}" = xset; then
1875       enable_languages="${LANGUAGES}"
1876         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1877     else
1878       enable_languages=default
1879     fi
1880   else
1881     if test x"${enable_languages}" = x ||
1882        test x"${enable_languages}" = xyes;
1883        then
1884       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1885       exit 1
1886     fi
1887   fi
1888   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1889
1890   # 'f95' is the old name for the 'fortran' language. We issue a warning
1891   # and make the substitution.
1892   case ,${enable_languages}, in
1893     *,f95,*)
1894       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1895       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1896       ;;
1897   esac
1898
1899   # If bootstrapping, C++ must be enabled.
1900   case ",$enable_languages,:$enable_bootstrap" in
1901     *,c++,*:*) ;;
1902     *:yes)
1903       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1904         enable_languages="${enable_languages},c++"
1905       else
1906         AC_MSG_ERROR([bootstrapping requires c++ sources])
1907       fi
1908       ;;
1909   esac
1910
1911   # First scan to see if an enabled language requires some other language.
1912   # We assume that a given config-lang.in will list all the language
1913   # front ends it requires, even if some are required indirectly.
1914   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1915     case ${lang_frag} in
1916       ..) ;;
1917       # The odd quoting in the next line works around
1918       # an apparent bug in bash 1.12 on linux.
1919       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1920       *)
1921         # From the config-lang.in, get $language, $lang_requires, and
1922         # $lang_requires_boot_languages.
1923         language=
1924         lang_requires=
1925         lang_requires_boot_languages=
1926         # set srcdir during sourcing lang_frag to the gcc dir.
1927         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
1928         # polutes this shell
1929         saved_srcdir=${srcdir}
1930         srcdir=${srcdir}/gcc . ${lang_frag}
1931         srcdir=${saved_srcdir}
1932         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1933           case ,${enable_languages}, in
1934             *,$other,*) ;;
1935             *,default,*) ;;
1936             *,all,*) ;;
1937             *,$language,*)
1938               echo " \`$other' language required by \`$language'; enabling" 1>&2
1939               enable_languages="${enable_languages},${other}"
1940               ;;
1941           esac
1942         done
1943         for other in ${lang_requires_boot_languages} ; do
1944           if test "$other" != "c"; then
1945             case ,${enable_stage1_languages}, in
1946               *,$other,*) ;;
1947               *,default,*) ;;
1948               *,all,*) ;;
1949               *)
1950                 case ,${enable_languages}, in
1951                   *,$language,*)
1952                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1953                     enable_stage1_languages="$enable_stage1_languages,${other}"
1954                     ;;
1955                 esac
1956                 ;;
1957             esac
1958           fi
1959         done
1960         ;;
1961     esac
1962   done
1963
1964   new_enable_languages=,c,
1965
1966   # If LTO is enabled, add the LTO front end.
1967   if test "$enable_lto" = "yes" ; then
1968     case ,${enable_languages}, in
1969       *,lto,*) ;;
1970       *) enable_languages="${enable_languages},lto" ;;
1971     esac
1972     if test "${build_lto_plugin}" = "yes" ; then
1973       configdirs="$configdirs lto-plugin"
1974     fi
1975   fi
1976
1977   # If we're building an offloading compiler, add the LTO front end.
1978   if test x"$enable_as_accelerator_for" != x ; then
1979     case ,${enable_languages}, in
1980       *,lto,*) ;;
1981       *) enable_languages="${enable_languages},lto" ;;
1982     esac
1983   fi
1984
1985   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
1986   potential_languages=,c,
1987
1988   enabled_target_libs=
1989   disabled_target_libs=
1990
1991   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1992     case ${lang_frag} in
1993       ..) ;;
1994       # The odd quoting in the next line works around
1995       # an apparent bug in bash 1.12 on linux.
1996       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1997       *)
1998         # From the config-lang.in, get $language, $target_libs,
1999         # $lang_dirs, $boot_language, and $build_by_default
2000         language=
2001         target_libs=
2002         lang_dirs=
2003         subdir_requires=
2004         boot_language=no
2005         build_by_default=yes
2006         # set srcdir during sourcing.  See above about save & restore
2007         saved_srcdir=${srcdir}
2008         srcdir=${srcdir}/gcc . ${lang_frag}
2009         srcdir=${saved_srcdir}
2010         if test x${language} = x; then
2011           echo "${lang_frag} doesn't set \$language." 1>&2
2012           exit 1
2013         fi
2014
2015         if test "$language" = "c++"; then
2016           boot_language=yes
2017         fi
2018
2019         add_this_lang=no
2020         # C is always enabled, so no need to add it again
2021         if test "$language" != "c"; then
2022           case ,${enable_languages}, in
2023             *,${language},*)
2024               # Language was explicitly selected; include it
2025               add_this_lang=yes
2026               ;;
2027             *,all,*)
2028               # All languages are enabled
2029               add_this_lang=all
2030               ;;
2031             *,default,*)
2032               # 'default' was selected, select it if it is a default language
2033               add_this_lang=${build_by_default}
2034               ;;
2035           esac
2036         fi
2037
2038         # Disable languages that need other directories if these aren't available.
2039         for i in $subdir_requires; do
2040           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2041           case ${add_this_lang} in
2042             yes)
2043               # Specifically requested language; tell them.
2044               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2045               ;;
2046             all)
2047               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2048               add_this_lang=unsupported
2049               ;;
2050             *)
2051               # Silently disable.
2052               add_this_lang=unsupported
2053               ;;
2054           esac
2055         done
2056
2057         # Disable Ada if no preexisting GNAT is available.
2058         case ${add_this_lang}:${language}:${have_gnat} in
2059           yes:ada:no)
2060             # Specifically requested language; tell them.
2061             AC_MSG_ERROR([GNAT is required to build $language])
2062             ;;
2063           all:ada:no)
2064             AC_MSG_WARN([GNAT is required to build $language])
2065             add_this_lang=unsupported
2066             ;;
2067           *:ada:no)
2068             # Silently disable.
2069             add_this_lang=unsupported
2070             ;;
2071         esac
2072
2073         # Disable jit if -enable-host-shared not specified
2074         case ${add_this_lang}:${language}:${host_shared} in
2075           yes:jit:no)
2076             # PR jit/64780: explicitly specify --enable-host-shared
2077             AC_MSG_ERROR([
2078 Enabling language "jit" requires --enable-host-shared.
2079
2080 --enable-host-shared typically slows the rest of the compiler down by
2081 a few %, so you must explicitly enable it.
2082
2083 If you want to build both the jit and the regular compiler, it is often
2084 best to do this via two separate configure/builds, in separate
2085 directories, to avoid imposing the performance cost of
2086 --enable-host-shared on the regular compiler.])
2087             ;;
2088           all:jit:no)
2089             AC_MSG_WARN([--enable-host-shared required to build $language])
2090             add_this_lang=unsupported
2091             ;;
2092           *:jit:no)
2093             # Silently disable.
2094             add_this_lang=unsupported
2095             ;;
2096         esac
2097
2098         # Disable a language that is unsupported by the target.
2099         case "${add_this_lang}: $unsupported_languages " in
2100           no:*) ;;
2101           unsupported:*) ;;
2102           *:*" $language "*)
2103             AC_MSG_WARN([${language} not supported for this target])
2104             add_this_lang=unsupported
2105             ;;
2106         esac
2107
2108         case $add_this_lang in
2109           unsupported)
2110             # Remove language-dependent dirs.
2111             disabled_target_libs="$disabled_target_libs $target_libs"
2112             noconfigdirs="$noconfigdirs $lang_dirs"
2113             ;;
2114           no)
2115             # Remove language-dependent dirs; still show language as supported.
2116             disabled_target_libs="$disabled_target_libs $target_libs"
2117             noconfigdirs="$noconfigdirs $lang_dirs"
2118             potential_languages="${potential_languages}${language},"
2119             ;;
2120           all|yes)
2121             new_enable_languages="${new_enable_languages}${language},"
2122             potential_languages="${potential_languages}${language},"
2123             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2124             enabled_target_libs="$enabled_target_libs $target_libs"
2125             case "${boot_language}:,$enable_stage1_languages," in
2126               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2127                 # Add to (comma-separated) list of stage 1 languages.
2128                 case ",$stage1_languages," in
2129                   *,$language,* | ,yes, | ,all,) ;;
2130                   *) stage1_languages="${stage1_languages}${language}," ;;
2131                 esac
2132                 # We need to bootstrap any supporting libraries.
2133                 bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
2134                 ;;
2135             esac
2136             ;;
2137         esac
2138         ;;
2139     esac
2140   done
2141
2142   # Add target libraries which are only needed for disabled languages
2143   # to noconfigdirs.
2144   if test -n "$disabled_target_libs"; then
2145     for dir in $disabled_target_libs; do
2146       case " $enabled_target_libs " in
2147       *" ${dir} "*) ;;
2148       *) noconfigdirs="$noconfigdirs $dir" ;;
2149       esac
2150     done
2151   fi
2152
2153   AC_ARG_ENABLE(stage1-languages,
2154   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2155                   [choose additional languages to build during
2156                   stage1.  Mostly useful for compiler development])],
2157   [case ,${enable_stage1_languages}, in
2158     ,no,|,,)
2159       # Set it to something that will have no effect in the loop below
2160       enable_stage1_languages=c ;;
2161     ,yes,)
2162       enable_stage1_languages=`echo $new_enable_languages | \
2163         sed -e "s/^,//" -e "s/,$//" ` ;;
2164     *,all,*)
2165       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2166         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2167   esac
2168
2169   # Add "good" languages from enable_stage1_languages to stage1_languages,
2170   # while "bad" languages go in missing_languages.  Leave no duplicates.
2171   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2172     case $potential_languages in
2173       *,$i,*)
2174         case $stage1_languages in
2175           *,$i,*) ;;
2176           *) stage1_languages="$stage1_languages$i," ;;
2177         esac ;;
2178       *)
2179         case $missing_languages in
2180           *,$i,*) ;;
2181           *) missing_languages="$missing_languages$i," ;;
2182         esac ;;
2183      esac
2184   done])
2185
2186   # Remove leading/trailing commas that were added for simplicity
2187   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2188   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2189   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2190   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2191
2192   if test "x$missing_languages" != x; then
2193     AC_MSG_ERROR([
2194 The following requested languages could not be built: ${missing_languages}
2195 Supported languages are: ${potential_languages}])
2196   fi
2197   if test "x$new_enable_languages" != "x$enable_languages"; then
2198     echo The following languages will be built: ${new_enable_languages}
2199     enable_languages="$new_enable_languages"
2200   fi
2201
2202   AC_SUBST(stage1_languages)
2203   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2204 fi
2205
2206 # Handle --disable-<component> generically.
2207 for dir in $configdirs $build_configdirs $target_configdirs ; do
2208   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2209   varname=`echo $dirname | sed -e s/+/_/g`
2210   if eval test x\${enable_${varname}} "=" xno ; then
2211     noconfigdirs="$noconfigdirs $dir"
2212   fi
2213 done
2214
2215 # Check for Boehm's garbage collector
2216 AC_ARG_ENABLE(objc-gc,
2217 [AS_HELP_STRING([--enable-objc-gc],
2218                 [enable use of Boehm's garbage collector with the
2219                  GNU Objective-C runtime])])
2220 AC_ARG_WITH([target-bdw-gc],
2221 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2222                 [specify prefix directory for installed bdw-gc package.
2223                  Equivalent to --with-target-bdw-gc-include=PATH/include
2224                  plus --with-target-bdw-gc-lib=PATH/lib])])
2225 AC_ARG_WITH([target-bdw-gc-include],
2226 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2227                 [specify directories for installed bdw-gc include files])])
2228 AC_ARG_WITH([target-bdw-gc-lib],
2229 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2230                 [specify directories for installed bdw-gc library])])
2231
2232 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2233   AC_MSG_CHECKING([for bdw garbage collector])
2234   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2235     dnl no bdw-gw options, assume default locations
2236     AC_MSG_RESULT([using bdw-gc in default locations])
2237   else
2238     dnl bdw-gw options, first error checking, complete checking in libobjc
2239     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2240       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2241     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2242       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2243     else
2244       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2245     fi
2246   fi
2247 esac
2248
2249 # Disable libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2250 case ,${enable_languages}, in
2251   *,c++,*)
2252     # Disable libitm, libsanitizer if we're not building libstdc++
2253     case "${noconfigdirs}" in
2254       *target-libstdc++-v3*)
2255         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2256         ;;
2257       *) ;;
2258     esac
2259     ;;
2260   *)
2261     noconfigdirs="$noconfigdirs target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2262     ;;
2263 esac
2264
2265 # If gcc/ is not in the source tree then we'll not be building a
2266 # target compiler, assume in that case we don't want to build any
2267 # target libraries or tools.
2268 #
2269 # This was added primarily for the benefit for binutils-gdb who reuse
2270 # this configure script, but don't always have target tools available.
2271 if test ! -d ${srcdir}/gcc; then
2272    skipdirs="${skipdirs} ${target_configdirs}"
2273 fi
2274
2275 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2276 # $build_configdirs and $target_configdirs.
2277 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2278
2279 notsupp=""
2280 for dir in . $skipdirs $noconfigdirs ; do
2281   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2282   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2283     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2284     if test -r $srcdir/$dirname/configure ; then
2285       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2286         true
2287       else
2288         notsupp="$notsupp $dir"
2289       fi
2290     fi
2291   fi
2292   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2293     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2294     if test -r $srcdir/$dirname/configure ; then
2295       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2296         true
2297       else
2298         notsupp="$notsupp $dir"
2299       fi
2300     fi
2301   fi
2302   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2303     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2304     if test -r $srcdir/$dirname/configure ; then
2305       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2306         true
2307       else
2308         notsupp="$notsupp $dir"
2309       fi
2310     fi
2311   fi
2312 done
2313
2314 # Quietly strip out all directories which aren't configurable in this tree.
2315 # This relies on all configurable subdirectories being autoconfiscated, which
2316 # is now the case.
2317 build_configdirs_all="$build_configdirs"
2318 build_configdirs=
2319 for i in ${build_configdirs_all} ; do
2320   j=`echo $i | sed -e s/build-//g`
2321   if test -f ${srcdir}/$j/configure ; then
2322     build_configdirs="${build_configdirs} $i"
2323   fi
2324 done
2325
2326 configdirs_all="$configdirs"
2327 configdirs=
2328 for i in ${configdirs_all} ; do
2329   if test -f ${srcdir}/$i/configure ; then
2330     configdirs="${configdirs} $i"
2331   fi
2332 done
2333
2334 target_configdirs_all="$target_configdirs"
2335 target_configdirs=
2336 for i in ${target_configdirs_all} ; do
2337   j=`echo $i | sed -e s/target-//g`
2338   if test -f ${srcdir}/$j/configure ; then
2339     target_configdirs="${target_configdirs} $i"
2340   fi
2341 done
2342
2343 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2344 # so we have to add it after the preceding checks.
2345 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2346 then
2347   case " $configdirs " in
2348     *" libiberty "*)
2349       # If we can build libiberty, we can also build libiberty-linker-plugin.
2350       configdirs="$configdirs libiberty-linker-plugin"
2351       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2352         --with-libiberty=../libiberty-linker-plugin";;
2353     *)
2354       AC_MSG_ERROR([libiberty missing]);;
2355   esac
2356 fi
2357
2358 # Sometimes we have special requirements for the host libiberty.
2359 extra_host_libiberty_configure_flags=
2360 case " $configdirs " in
2361   *" lto-plugin "* | *" libcc1 "* | *" gdbserver "*)
2362     # When these are to be built as shared libraries, the same applies to
2363     # libiberty.
2364     extra_host_libiberty_configure_flags=--enable-shared
2365     ;;
2366 esac
2367 AC_SUBST(extra_host_libiberty_configure_flags)
2368
2369 # Sometimes we have special requirements for the host zlib.
2370 extra_host_zlib_configure_flags=
2371 case " $configdirs " in
2372   *" bfd "*)
2373     # When bfd is to be built as a shared library, the same applies to
2374     # zlib.
2375     if test "$enable_shared" = "yes"; then
2376       extra_host_zlib_configure_flags=--enable-host-shared
2377     fi
2378     ;;
2379 esac
2380 AC_SUBST(extra_host_zlib_configure_flags)
2381
2382 # Produce a warning message for the subdirs we can't configure.
2383 # This isn't especially interesting in the Cygnus tree, but in the individual
2384 # FSF releases, it's important to let people know when their machine isn't
2385 # supported by the one or two programs in a package.
2386
2387 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2388   # If $appdirs is non-empty, at least one of those directories must still
2389   # be configured, or we error out.  (E.g., if the gas release supports a
2390   # specified target in some subdirs but not the gas subdir, we shouldn't
2391   # pretend that all is well.)
2392   if test -n "$appdirs" ; then
2393     for dir in $appdirs ; do
2394       if test -r $dir/Makefile.in ; then
2395         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2396           appdirs=""
2397           break
2398         fi
2399         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2400           appdirs=""
2401           break
2402         fi
2403       fi
2404     done
2405     if test -n "$appdirs" ; then
2406       echo "*** This configuration is not supported by this package." 1>&2
2407       exit 1
2408     fi
2409   fi
2410   # Okay, some application will build, or we don't care to check.  Still
2411   # notify of subdirs not getting built.
2412   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2413   echo "    ${notsupp}" 1>&2
2414   echo "    (Any other directories should still work fine.)" 1>&2
2415 fi
2416
2417 case "$host" in
2418   *msdosdjgpp*)
2419     enable_gdbtk=no ;;
2420 esac
2421
2422 # To find our prefix, in gcc_cv_tool_prefix.
2423 ACX_TOOL_DIRS
2424
2425 copy_dirs=
2426
2427 AC_ARG_WITH([build-sysroot],
2428   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2429                   [use sysroot as the system root during the build])],
2430   [if test x"$withval" != x ; then
2431      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2432    fi],
2433   [SYSROOT_CFLAGS_FOR_TARGET=])
2434 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2435
2436 AC_ARG_WITH([debug-prefix-map],
2437   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2438                   [map A to B, C to D ... in debug information])],
2439   [if test x"$withval" != x; then
2440      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2441      for debug_map in $withval; do
2442        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2443      done
2444    fi],
2445   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2446 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2447
2448 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2449 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2450 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2451 # We want to ensure that TARGET libraries (which we know are built with
2452 # gcc) are built with "-O2 -g", so include those options when setting
2453 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2454 if test "x$CFLAGS_FOR_TARGET" = x; then
2455   if test "x${is_cross_compiler}" = xyes; then
2456     CFLAGS_FOR_TARGET="-g -O2"
2457   else
2458     CFLAGS_FOR_TARGET=$CFLAGS
2459     case " $CFLAGS " in
2460       *" -O2 "*) ;;
2461       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2462     esac
2463     case " $CFLAGS " in
2464       *" -g "* | *" -g3 "*) ;;
2465       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2466     esac
2467   fi
2468 fi
2469 AC_SUBST(CFLAGS_FOR_TARGET)
2470
2471 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2472   if test "x${is_cross_compiler}" = xyes; then
2473     CXXFLAGS_FOR_TARGET="-g -O2"
2474   else
2475     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2476     case " $CXXFLAGS " in
2477       *" -O2 "*) ;;
2478       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2479     esac
2480     case " $CXXFLAGS " in
2481       *" -g "* | *" -g3 "*) ;;
2482       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2483     esac
2484   fi
2485 fi
2486 AC_SUBST(CXXFLAGS_FOR_TARGET)
2487
2488 AC_SUBST(LDFLAGS_FOR_TARGET)
2489
2490 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2491 # the named directory are copied to $(tooldir)/sys-include.
2492 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2493   if test x${is_cross_compiler} = xno ; then
2494     echo 1>&2 '***' --with-headers is only supported when cross compiling
2495     exit 1
2496   fi
2497   if test x"${with_headers}" != xyes ; then
2498     x=${gcc_cv_tool_prefix}
2499     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2500   fi
2501 fi
2502
2503 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2504 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2505 # are permitted.
2506 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2507   if test x${is_cross_compiler} = xno ; then
2508     echo 1>&2 '***' --with-libs is only supported when cross compiling
2509     exit 1
2510   fi
2511   if test x"${with_libs}" != xyes ; then
2512     # Copy the libraries in reverse order, so that files in the first named
2513     # library override files in subsequent libraries.
2514     x=${gcc_cv_tool_prefix}
2515     for l in ${with_libs}; do
2516       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2517     done
2518   fi
2519 fi
2520
2521 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2522 #
2523 # This is done by determining whether or not the appropriate directory
2524 # is available, and by checking whether or not specific configurations
2525 # have requested that this magic not happen.
2526 #
2527 # The command line options always override the explicit settings in
2528 # configure.ac, and the settings in configure.ac override this magic.
2529 #
2530 # If the default for a toolchain is to use GNU as and ld, and you don't
2531 # want to do that, then you should use the --without-gnu-as and
2532 # --without-gnu-ld options for the configure script.  Similarly, if
2533 # the default is to use the included zlib and you don't want to do that,
2534 # you should use the --with-system-zlib option for the configure script.
2535
2536 if test x${use_gnu_as} = x &&
2537    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2538   with_gnu_as=yes
2539   extra_host_args="$extra_host_args --with-gnu-as"
2540 fi
2541
2542 if test x${use_gnu_ld} = x &&
2543    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2544   with_gnu_ld=yes
2545   extra_host_args="$extra_host_args --with-gnu-ld"
2546 fi
2547
2548 if test x${use_included_zlib} = x &&
2549    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2550   :
2551 else
2552   with_system_zlib=yes
2553   extra_host_args="$extra_host_args --with-system-zlib"
2554 fi
2555
2556 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2557 # can detect this case.
2558
2559 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2560   with_newlib=yes
2561   extra_host_args="$extra_host_args --with-newlib"
2562 fi
2563
2564 # Handle ${copy_dirs}
2565 set fnord ${copy_dirs}
2566 shift
2567 while test $# != 0 ; do
2568   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2569     :
2570   else
2571     echo Copying $1 to $2
2572
2573     # Use the install script to create the directory and all required
2574     # parent directories.
2575     if test -d $2 ; then
2576       :
2577     else
2578       echo >config.temp
2579       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2580     fi
2581
2582     # Copy the directory, assuming we have tar.
2583     # FIXME: Should we use B in the second tar?  Not all systems support it.
2584     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2585
2586     # It is the responsibility of the user to correctly adjust all
2587     # symlinks.  If somebody can figure out how to handle them correctly
2588     # here, feel free to add the code.
2589
2590     echo $1 > $2/COPIED
2591   fi
2592   shift; shift
2593 done
2594
2595 # Determine a target-dependent exec_prefix that the installed
2596 # gcc will search in.  Keep this list sorted by triplet, with
2597 # the *-*-osname triplets last.
2598 md_exec_prefix=
2599 case "${target}" in
2600   i[[34567]]86-pc-msdosdjgpp*)
2601     md_exec_prefix=/dev/env/DJDIR/bin
2602     ;;
2603   *-*-hpux* | \
2604   *-*-nto-qnx* | \
2605   *-*-solaris2*)
2606     md_exec_prefix=/usr/ccs/bin
2607     ;;
2608 esac
2609
2610 extra_arflags_for_target=
2611 extra_nmflags_for_target=
2612 extra_ranlibflags_for_target=
2613 target_makefile_frag=/dev/null
2614 case "${target}" in
2615   spu-*-*)
2616     target_makefile_frag="config/mt-spu"
2617     ;;
2618   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2619     target_makefile_frag="config/mt-sde"
2620     ;;
2621   mipsisa*-*-elfoabi*)
2622     target_makefile_frag="config/mt-mips-elfoabi"
2623     ;;
2624   mips*-*-*linux* | mips*-*-gnu*)
2625     target_makefile_frag="config/mt-mips-gnu"
2626     ;;
2627   nios2-*-elf*)
2628     target_makefile_frag="config/mt-nios2-elf"
2629     ;;
2630   *-*-linux-android*)
2631     target_makefile_frag="config/mt-android"
2632     ;;
2633   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2634     target_makefile_frag="config/mt-gnu"
2635     ;;
2636   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2637     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2638     # commands to handle both 32-bit and 64-bit objects.  These flags are
2639     # harmless if we're using GNU nm or ar.
2640     extra_arflags_for_target=" -X32_64"
2641     extra_nmflags_for_target=" -B -X32_64"
2642     ;;
2643 esac
2644
2645 alphaieee_frag=/dev/null
2646 case $target in
2647   alpha*-*-*)
2648     # This just makes sure to use the -mieee option to build target libs.
2649     # This should probably be set individually by each library.
2650     alphaieee_frag="config/mt-alphaieee"
2651     ;;
2652 esac
2653
2654 # If --enable-target-optspace always use -Os instead of -O2 to build
2655 # the target libraries, similarly if it is not specified, use -Os
2656 # on selected platforms.
2657 ospace_frag=/dev/null
2658 case "${enable_target_optspace}:${target}" in
2659   yes:*)
2660     ospace_frag="config/mt-ospace"
2661     ;;
2662   :d30v-*)
2663     ospace_frag="config/mt-d30v"
2664     ;;
2665   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2666     ospace_frag="config/mt-ospace"
2667     ;;
2668   no:* | :*)
2669     ;;
2670   *)
2671     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2672     ;;
2673 esac
2674
2675 # Some systems (e.g., one of the i386-aix systems the gas testers are
2676 # using) don't handle "\$" correctly, so don't use it here.
2677 tooldir='${exec_prefix}'/${target_noncanonical}
2678 build_tooldir=${tooldir}
2679
2680 # Create a .gdbinit file which runs the one in srcdir
2681 # and tells GDB to look there for source files.
2682
2683 if test -r ${srcdir}/.gdbinit ; then
2684   case ${srcdir} in
2685     .) ;;
2686     *) cat > ./.gdbinit <<EOF
2687 # ${NO_EDIT}
2688 dir ${srcdir}
2689 dir .
2690 source ${srcdir}/.gdbinit
2691 EOF
2692     ;;
2693   esac
2694 fi
2695
2696 # Make sure that the compiler is able to generate an executable.  If it
2697 # can't, we are probably in trouble.  We don't care whether we can run the
2698 # executable--we might be using a cross compiler--we only care whether it
2699 # can be created.  At this point the main configure script has set CC.
2700 we_are_ok=no
2701 echo "int main () { return 0; }" > conftest.c
2702 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2703 if test $? = 0 ; then
2704   if test -s conftest || test -s conftest.exe ; then
2705     we_are_ok=yes
2706   fi
2707 fi
2708 case $we_are_ok in
2709   no)
2710     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2711     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2712     rm -f conftest*
2713     exit 1
2714     ;;
2715 esac
2716 rm -f conftest*
2717
2718 # Decide which environment variable is used to find dynamic libraries.
2719 case "${host}" in
2720   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2721   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2722   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2723   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2724 esac
2725
2726 # On systems where the dynamic library environment variable is PATH,
2727 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2728 # built executables to PATH.
2729 if test "$RPATH_ENVVAR" = PATH; then
2730   GCC_SHLIB_SUBDIR=/shlib
2731 else
2732   GCC_SHLIB_SUBDIR=
2733 fi
2734
2735 # Adjust the toplevel makefile according to whether bootstrap was selected.
2736 case $enable_bootstrap in
2737   yes)
2738     bootstrap_suffix=bootstrap
2739     BUILD_CONFIG=bootstrap-debug
2740     ;;
2741   no)
2742     bootstrap_suffix=no-bootstrap
2743     BUILD_CONFIG=
2744     ;;
2745 esac
2746
2747 AC_MSG_CHECKING(for default BUILD_CONFIG)
2748
2749 AC_ARG_WITH([build-config],
2750   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2751                   [use config/NAME.mk build configuration])],
2752   [case $with_build_config in
2753    yes) with_build_config= ;;
2754    no) with_build_config= BUILD_CONFIG= ;;
2755    esac])
2756
2757 if test "x${with_build_config}" != x; then
2758   BUILD_CONFIG=$with_build_config
2759 else
2760   case $BUILD_CONFIG in
2761   bootstrap-debug)
2762     if echo "int f (void) { return 0; }" > conftest.c &&
2763        ${CC} -c conftest.c &&
2764        mv conftest.o conftest.o.g0 &&
2765        ${CC} -c -g conftest.c &&
2766        mv conftest.o conftest.o.g &&
2767        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2768       :
2769     else
2770       BUILD_CONFIG=
2771     fi
2772     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2773     ;;
2774   esac
2775 fi
2776 AC_MSG_RESULT($BUILD_CONFIG)
2777 AC_SUBST(BUILD_CONFIG)
2778
2779 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2780 AC_MSG_CHECKING([for --enable-vtable-verify])
2781 AC_ARG_ENABLE(vtable-verify,
2782 [AS_HELP_STRING([--enable-vtable-verify],
2783                 [Enable vtable verification feature])],
2784 [case "$enableval" in
2785  yes) enable_vtable_verify=yes ;;
2786  no)  enable_vtable_verify=no ;;
2787  *)   enable_vtable_verify=no;;
2788  esac],
2789 [enable_vtable_verify=no])
2790 AC_MSG_RESULT($enable_vtable_verify)
2791
2792 # Record target_configdirs and the configure arguments for target and
2793 # build configuration in Makefile.
2794 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2795 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2796 bootstrap_fixincludes=no
2797
2798 # If we are building libgomp, bootstrap it.
2799 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2800   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2801 fi
2802
2803 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2804 # or bootstrap-ubsan, bootstrap it.
2805 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2806   case "$BUILD_CONFIG" in
2807     *bootstrap-asan* | *bootstrap-ubsan* )
2808       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2809       bootstrap_fixincludes=yes
2810       ;;
2811   esac
2812 fi
2813
2814 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2815 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2816    test "$enable_vtable_verify" != no; then
2817   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2818 fi
2819
2820 # Determine whether gdb needs tk/tcl or not.
2821 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2822 # and in that case we want gdb to be built without tk.  Ugh!
2823 # In fact I believe gdb is the *only* package directly dependent on tk,
2824 # so we should be able to put the 'maybe's in unconditionally and
2825 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2826 # 100% sure that that's safe though.
2827
2828 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2829 case "$enable_gdbtk" in
2830   no)
2831     GDB_TK="" ;;
2832   yes)
2833     GDB_TK="${gdb_tk}" ;;
2834   *)
2835     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2836     # distro.  Eventually someone will fix this and move Insight, nee
2837     # gdbtk to a separate directory.
2838     if test -d ${srcdir}/gdb/gdbtk ; then
2839       GDB_TK="${gdb_tk}"
2840     else
2841       GDB_TK=""
2842     fi
2843     ;;
2844 esac
2845 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2846 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2847
2848 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
2849 # else does, only include them if one of these is built.  The Makefile
2850 # provides the ordering, so it's enough here to add to the list.
2851 case " ${configdirs} " in
2852   *\ gdb\ *)
2853     configdirs="${configdirs} gnulib gdbsupport"
2854     ;;
2855   *\ gdbserver\ *)
2856     configdirs="${configdirs} gnulib gdbsupport"
2857     ;;
2858   *\ sim\ *)
2859     configdirs="${configdirs} gnulib"
2860     ;;
2861 esac
2862
2863 # Strip out unwanted targets.
2864
2865 # While at that, we remove Makefiles if we were started for recursive
2866 # configuration, so that the top-level Makefile reconfigures them,
2867 # like we used to do when configure itself was recursive.
2868
2869 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2870 # but now we're fixing up the Makefile ourselves with the additional
2871 # commands passed to AC_CONFIG_FILES.  Use separate variables
2872 # extrasub-{build,host,target} not because there is any reason to split
2873 # the substitutions up that way, but only to remain below the limit of
2874 # 99 commands in a script, for HP-UX sed.
2875
2876 # Do not nest @if/@endif or @unless/@endunless pairs, because
2877 # configure will not warn you at all.
2878
2879 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2880   yes:yes:*\ gold\ *:*,c++,*) ;;
2881   yes:yes:*\ gold\ *:*)
2882     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2883     ;;
2884 esac
2885
2886 extrasub_build=
2887 for module in ${build_configdirs} ; do
2888   if test -z "${no_recursion}" \
2889      && test -f ${build_subdir}/${module}/Makefile; then
2890     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2891     rm -f ${build_subdir}/${module}/Makefile
2892   fi
2893   extrasub_build="$extrasub_build
2894 /^@if build-$module\$/d
2895 /^@endif build-$module\$/d
2896 /^@unless build-$module\$/,/^@endunless build-$module\$/d
2897 /^@if build-$module-$bootstrap_suffix\$/d
2898 /^@endif build-$module-$bootstrap_suffix\$/d
2899 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
2900 done
2901 extrasub_host=
2902 for module in ${configdirs} ; do
2903   if test -z "${no_recursion}"; then
2904     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2905       if test -f ${file}; then
2906         echo 1>&2 "*** removing ${file} to force reconfigure"
2907         rm -f ${file}
2908       fi
2909     done
2910   fi
2911   case ${module},${bootstrap_fixincludes} in
2912     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2913     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2914   esac
2915   extrasub_host="$extrasub_host
2916 /^@if $module\$/d
2917 /^@endif $module\$/d
2918 /^@unless $module\$/,/^@endunless $module\$/d
2919 /^@if $module-$host_bootstrap_suffix\$/d
2920 /^@endif $module-$host_bootstrap_suffix\$/d
2921 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
2922 done
2923 extrasub_target=
2924 for module in ${target_configdirs} ; do
2925   if test -z "${no_recursion}" \
2926      && test -f ${target_subdir}/${module}/Makefile; then
2927     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2928     rm -f ${target_subdir}/${module}/Makefile
2929   fi
2930
2931   # We only bootstrap target libraries listed in bootstrap_target_libs.
2932   case $bootstrap_target_libs in
2933     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2934     *) target_bootstrap_suffix=no-bootstrap ;;
2935   esac
2936
2937   extrasub_target="$extrasub_target
2938 /^@if target-$module\$/d
2939 /^@endif target-$module\$/d
2940 /^@unless target-$module\$/,/^@endunless target-$module\$/d
2941 /^@if target-$module-$target_bootstrap_suffix\$/d
2942 /^@endif target-$module-$target_bootstrap_suffix\$/d
2943 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
2944 done
2945
2946 # Do the final fixup along with target modules.
2947 extrasub_target="$extrasub_target
2948 /^@if /,/^@endif /d
2949 /^@unless /d
2950 /^@endunless /d"
2951
2952 if test "$enable_pgo_build" != "no"; then
2953   extrasub_build="$extrasub_build
2954 /^@if pgo-build\$/d
2955 /^@endif pgo-build\$/d"
2956 fi
2957
2958 # Create the serialization dependencies.  This uses a temporary file.
2959
2960 AC_ARG_ENABLE([serial-configure],
2961 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
2962                 [force sequential configuration of
2963                  sub-packages for the host, target or build
2964                  machine, or all sub-packages])])
2965
2966 case ${enable_serial_configure} in
2967   yes)
2968     enable_serial_build_configure=yes
2969     enable_serial_host_configure=yes
2970     enable_serial_target_configure=yes
2971     ;;
2972 esac
2973
2974 # These force 'configure's to be done one at a time, to avoid problems
2975 # with contention over a shared config.cache.
2976 rm -f serdep.tmp
2977 echo '# serdep.tmp' > serdep.tmp
2978 olditem=
2979 test "x${enable_serial_build_configure}" = xyes &&
2980 for item in ${build_configdirs} ; do
2981   case ${olditem} in
2982     "") ;;
2983     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
2984   esac
2985   olditem=${item}
2986 done
2987 olditem=
2988 test "x${enable_serial_host_configure}" = xyes &&
2989 for item in ${configdirs} ; do
2990   case ${olditem} in
2991     "") ;;
2992     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
2993   esac
2994   olditem=${item}
2995 done
2996 olditem=
2997 test "x${enable_serial_target_configure}" = xyes &&
2998 for item in ${target_configdirs} ; do
2999   case ${olditem} in
3000     "") ;;
3001     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
3002   esac
3003   olditem=${item}
3004 done
3005 serialization_dependencies=serdep.tmp
3006 AC_SUBST_FILE(serialization_dependencies)
3007
3008 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
3009 # target, nonopt, and variable assignments.  These are the ones we
3010 # might not want to pass down to subconfigures.  The exception being
3011 # --cache-file=/dev/null, which is used to turn off the use of cache
3012 # files altogether, and which should be passed on to subconfigures.
3013 # Also strip program-prefix, program-suffix, and program-transform-name,
3014 # so that we can pass down a consistent program-transform-name.
3015 baseargs=
3016 tbaseargs=
3017 keep_next=no
3018 skip_next=no
3019 eval "set -- $ac_configure_args"
3020 for ac_arg
3021 do
3022   if test X"$skip_next" = X"yes"; then
3023     skip_next=no
3024     continue
3025   fi
3026   if test X"$keep_next" = X"yes"; then
3027     case $ac_arg in
3028       *\'*)
3029         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3030     esac
3031     baseargs="$baseargs '$ac_arg'"
3032     tbaseargs="$tbaseargs '$ac_arg'"
3033     keep_next=no
3034     continue
3035   fi
3036
3037   # Handle separated arguments.  Based on the logic generated by
3038   # autoconf 2.59.
3039   case $ac_arg in
3040     *=* | --config-cache | -C | -disable-* | --disable-* \
3041       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3042       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3043       | -with-* | --with-* | -without-* | --without-* | --x)
3044       separate_arg=no
3045       ;;
3046     -*)
3047       separate_arg=yes
3048       ;;
3049     *)
3050       separate_arg=no
3051       ;;
3052   esac
3053
3054   skip_targ=no
3055   case $ac_arg in
3056 changequote(,)
3057   --with-* | --without-*)
3058     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3059
3060     case $libopt in
3061     *[-_]include)
3062       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3063       ;;
3064     *[-_]lib)
3065       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3066       ;;
3067     *)
3068       lib=$libopt
3069       ;;
3070     esac
3071 changequote([,])
3072
3073     case $lib in
3074     mpc | mpfr | gmp | isl)
3075       # If we're processing --with-$lib, --with-$lib-include or
3076       # --with-$lib-lib, for one of the libs above, and target is
3077       # different from host, don't pass the current argument to any
3078       # target library's configure.
3079       if test x$is_cross_compiler = xyes; then
3080         skip_targ=yes
3081       fi
3082       ;;
3083     esac
3084     ;;
3085   esac
3086
3087   case "$ac_arg" in
3088     --cache-file=/dev/null | \
3089     -cache-file=/dev/null )
3090       # Handled here to avoid the test to skip args below.
3091       baseargs="$baseargs '$ac_arg'"
3092       tbaseargs="$tbaseargs '$ac_arg'"
3093       # Assert: $separate_arg should always be no.
3094       keep_next=$separate_arg
3095       ;;
3096     --no*)
3097       continue
3098       ;;
3099     --c* | \
3100     --sr* | \
3101     --ho* | \
3102     --bu* | \
3103     --t* | \
3104     --program-* | \
3105     -cache_file* | \
3106     -srcdir* | \
3107     -host* | \
3108     -build* | \
3109     -target* | \
3110     -program-prefix* | \
3111     -program-suffix* | \
3112     -program-transform-name* )
3113       skip_next=$separate_arg
3114       continue
3115       ;;
3116     -*)
3117       # An option.  Add it.
3118       case $ac_arg in
3119         *\'*)
3120           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3121       esac
3122       baseargs="$baseargs '$ac_arg'"
3123       if test X"$skip_targ" = Xno; then
3124         tbaseargs="$tbaseargs '$ac_arg'"
3125       fi
3126       keep_next=$separate_arg
3127       ;;
3128     *)
3129       # Either a variable assignment, or a nonopt (triplet).  Don't
3130       # pass it down; let the Makefile handle this.
3131       continue
3132       ;;
3133   esac
3134 done
3135 # Remove the initial space we just introduced and, as these will be
3136 # expanded by make, quote '$'.
3137 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3138
3139 # Add in --program-transform-name, after --program-prefix and
3140 # --program-suffix have been applied to it.  Autoconf has already
3141 # doubled dollar signs and backslashes in program_transform_name; we want
3142 # the backslashes un-doubled, and then the entire thing wrapped in single
3143 # quotes, because this will be expanded first by make and then by the shell.
3144 # Also, because we want to override the logic in subdir configure scripts to
3145 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3146 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3147 ${program_transform_name}
3148 EOF_SED
3149 gcc_transform_name=`cat conftestsed.out`
3150 rm -f conftestsed.out
3151 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3152 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3153 if test "$silent" = yes; then
3154   baseargs="$baseargs --silent"
3155   tbaseargs="$tbaseargs --silent"
3156 fi
3157
3158 baseargs="$baseargs --disable-option-checking"
3159 tbaseargs="$tbaseargs --disable-option-checking"
3160
3161 if test "$enable_year2038" = no; then
3162   baseargs="$baseargs --disable-year2038"
3163   tbaseargs="$tbaseargs --disable-year2038"
3164 fi
3165
3166 # Record and document user additions to sub configure arguments.
3167 AC_ARG_VAR([build_configargs],
3168            [additional configure arguments for build directories])
3169 AC_ARG_VAR([host_configargs],
3170            [additional configure arguments for host directories])
3171 AC_ARG_VAR([target_configargs],
3172            [additional configure arguments for target directories])
3173
3174 # For the build-side libraries, we just need to pretend we're native,
3175 # and not use the same cache file.  Multilibs are neither needed nor
3176 # desired.  We can't even use the same cache file for all build-side
3177 # libraries, as they're compiled differently; some with C, some with
3178 # C++ or with different feature-enabling options.
3179 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3180
3181 # For host modules, accept cache file option, or specification as blank.
3182 case "${cache_file}" in
3183 "") # empty
3184   cache_file_option="" ;;
3185 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3186   cache_file_option="--cache-file=${cache_file}" ;;
3187 *) # relative path
3188   cache_file_option="--cache-file=../${cache_file}" ;;
3189 esac
3190
3191 # Host dirs don't like to share a cache file either, horribly enough.
3192 # This seems to be due to autoconf 2.5x stupidity.
3193 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3194
3195 target_configargs="$target_configargs ${tbaseargs}"
3196
3197 # Passing a --with-cross-host argument lets the target libraries know
3198 # whether they are being built with a cross-compiler or being built
3199 # native.  However, it would be better to use other mechanisms to make the
3200 # sorts of decisions they want to make on this basis.  Please consider
3201 # this option to be deprecated.  FIXME.
3202 if test x${is_cross_compiler} = xyes ; then
3203   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3204 fi
3205
3206 # Special user-friendly check for native x86_64-linux build, if
3207 # multilib is not explicitly enabled.
3208 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3209   x86_64-*linux*:yes:$build:$build:)
3210     # Make sure we have a development environment that handles 32-bit
3211     dev64=no
3212     echo "int main () { return 0; }" > conftest.c
3213     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3214     if test $? = 0 ; then
3215       if test -s conftest || test -s conftest.exe ; then
3216         dev64=yes
3217       fi
3218     fi
3219     rm -f conftest*
3220     if test x${dev64} != xyes ; then
3221       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.])
3222     fi
3223     ;;
3224 esac
3225
3226 # Default to --enable-multilib.
3227 if test x${enable_multilib} = x ; then
3228   target_configargs="--enable-multilib ${target_configargs}"
3229 fi
3230
3231 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3232 # changed from the earlier setting of with_newlib.
3233 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3234   target_configargs="--with-newlib ${target_configargs}"
3235 fi
3236
3237 # Different target subdirs use different values of certain variables
3238 # (notably CXX).  Worse, multilibs use *lots* of different values.
3239 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3240 # it doesn't automatically accept command-line overrides of them.
3241 # This means it's not safe for target subdirs to share a cache file,
3242 # which is disgusting, but there you have it.  Hopefully this can be
3243 # fixed in future.  It's still worthwhile to use a cache file for each
3244 # directory.  I think.
3245
3246 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3247 # We need to pass --target, as newer autoconf's requires consistency
3248 # for target_alias and gcc doesn't manage it consistently.
3249 target_configargs="--cache-file=./config.cache ${target_configargs}"
3250
3251 FLAGS_FOR_TARGET=
3252 case " $target_configdirs " in
3253  *" newlib "*)
3254   case " $target_configargs " in
3255   *" --with-newlib "*)
3256    case "$target" in
3257     *-cygwin*)
3258       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3259       ;;
3260    esac
3261
3262    # If we're not building GCC, don't discard standard headers.
3263    if test -d ${srcdir}/gcc; then
3264      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3265
3266      if test "${build}" != "${host}"; then
3267        # On Canadian crosses, CC_FOR_TARGET will have already been set
3268        # by `configure', so we won't have an opportunity to add -Bgcc/
3269        # to it.  This is right: we don't want to search that directory
3270        # for binaries, but we want the header files in there, so add
3271        # them explicitly.
3272        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3273
3274        # Someone might think of using the pre-installed headers on
3275        # Canadian crosses, in case the installed compiler is not fully
3276        # compatible with the compiler being built.  In this case, it
3277        # would be better to flag an error than risking having
3278        # incompatible object files being constructed.  We can't
3279        # guarantee that an error will be flagged, but let's hope the
3280        # compiler will do it, when presented with incompatible header
3281        # files.
3282      fi
3283    fi
3284
3285    case "${target}-${is_cross_compiler}" in
3286    i[[3456789]]86-*-linux*-no)
3287       # Here host == target, so we don't need to build gcc,
3288       # so we don't want to discard standard headers.
3289       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3290       ;;
3291    *)
3292       # If we're building newlib, use its generic headers last, but search
3293       # for any libc-related directories first (so make it the last -B
3294       # switch).
3295       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3296
3297       # If we're building libgloss, find the startup file, simulator library
3298       # and linker script.
3299       case " $target_configdirs " in
3300         *" libgloss "*)
3301         # Look for startup file, simulator library and maybe linker script.
3302         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3303         # Look for libnosys.a in case the target needs it.
3304         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3305         # Most targets have the linker script in the source directory.
3306         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3307         ;;
3308       esac
3309       ;;
3310    esac
3311    ;;
3312   esac
3313   ;;
3314 esac
3315
3316 case "$target" in
3317   x86_64-*mingw* | *-w64-mingw*)
3318   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3319   # however, use a symlink named 'mingw' in ${prefix} .
3320     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3321     ;;
3322   *-mingw*)
3323   # MinGW can't be handled as Cygwin above since it does not use newlib.
3324     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3325     ;;
3326 esac
3327
3328 # Allow the user to override the flags for
3329 # our build compiler if desired.
3330 if test x"${build}" = x"${host}" ; then
3331   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3332   CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
3333   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3334   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3335 fi
3336
3337 # On Canadian crosses, we'll be searching the right directories for
3338 # the previously-installed cross compiler, so don't bother to add
3339 # flags for directories within the install tree of the compiler
3340 # being built; programs in there won't even run.
3341 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3342   # Search for pre-installed headers if nothing else fits.
3343   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3344 fi
3345
3346 if test "x${use_gnu_ld}" = x &&
3347    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3348   # Arrange for us to find uninstalled linker scripts.
3349   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3350 fi
3351
3352 # Search for other target-specific linker scripts and such.
3353 case "${target}" in
3354   mep*)
3355     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3356     ;;
3357 esac
3358
3359 # Makefile fragments.
3360 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3361 do
3362   eval fragval=\$$frag
3363   if test $fragval != /dev/null; then
3364     eval $frag=${srcdir}/$fragval
3365   fi
3366 done
3367 AC_SUBST_FILE(host_makefile_frag)
3368 AC_SUBST_FILE(target_makefile_frag)
3369 AC_SUBST_FILE(alphaieee_frag)
3370 AC_SUBST_FILE(ospace_frag)
3371
3372 # Miscellanea: directories, flags, etc.
3373 AC_SUBST(RPATH_ENVVAR)
3374 AC_SUBST(GCC_SHLIB_SUBDIR)
3375 AC_SUBST(tooldir)
3376 AC_SUBST(build_tooldir)
3377 AC_SUBST(CONFIGURE_GDB_TK)
3378 AC_SUBST(GDB_TK)
3379 AC_SUBST(INSTALL_GDB_TK)
3380
3381 # Build module lists & subconfigure args.
3382 AC_SUBST(build_configargs)
3383 AC_SUBST(build_configdirs)
3384
3385 # Host module lists & subconfigure args.
3386 AC_SUBST(host_configargs)
3387 AC_SUBST(configdirs)
3388 AC_SUBST(target_configdirs)
3389
3390 # Target module lists & subconfigure args.
3391 AC_SUBST(target_configargs)
3392
3393
3394 # Build tools.
3395 AC_SUBST(AR_FOR_BUILD)
3396 AC_SUBST(AS_FOR_BUILD)
3397 AC_SUBST(CC_FOR_BUILD)
3398 AC_SUBST(CFLAGS_FOR_BUILD)
3399 AC_SUBST(CPPFLAGS_FOR_BUILD)
3400 AC_SUBST(CXXFLAGS_FOR_BUILD)
3401 AC_SUBST(CXX_FOR_BUILD)
3402 AC_SUBST(DLLTOOL_FOR_BUILD)
3403 AC_SUBST(GFORTRAN_FOR_BUILD)
3404 AC_SUBST(GOC_FOR_BUILD)
3405 AC_SUBST(LDFLAGS_FOR_BUILD)
3406 AC_SUBST(LD_FOR_BUILD)
3407 AC_SUBST(NM_FOR_BUILD)
3408 AC_SUBST(RANLIB_FOR_BUILD)
3409 AC_SUBST(WINDMC_FOR_BUILD)
3410 AC_SUBST(WINDRES_FOR_BUILD)
3411
3412 # Generate default definitions for YACC, M4, LEX and other programs that run
3413 # on the build machine.  These are used if the Makefile can't locate these
3414 # programs in objdir.
3415 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3416
3417 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3418 case " $build_configdirs " in
3419   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3420 esac
3421
3422 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3423 case " $build_configdirs " in
3424   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3425 esac
3426
3427 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3428 case " $build_configdirs " in
3429   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3430 esac
3431
3432 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3433 case " $build_configdirs " in
3434   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3435   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3436 esac
3437
3438 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3439 case " $build_configdirs " in
3440   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3441 esac
3442
3443 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3444 case " $build_configdirs " in
3445   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3446   *)
3447 changequote(,)
3448     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3449     # higher, else we use the "missing" dummy.
3450     if ${MAKEINFO} --version \
3451        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3452       :
3453     else
3454       MAKEINFO="$MISSING makeinfo"
3455     fi
3456     ;;
3457 changequote([,])
3458 esac
3459
3460 # FIXME: expect and dejagnu may become build tools?
3461
3462 AC_CHECK_PROGS(EXPECT, expect, expect)
3463 case " $configdirs " in
3464   *" expect "*)
3465     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3466     ;;
3467 esac
3468
3469 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3470 case " $configdirs " in
3471   *" dejagnu "*)
3472     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3473     ;;
3474 esac
3475
3476
3477 # Host tools.
3478 NCN_STRICT_CHECK_TOOLS(AR, ar)
3479 NCN_STRICT_CHECK_TOOLS(AS, as)
3480 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3481 NCN_STRICT_CHECK_TOOLS(LD, ld)
3482 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3483 NCN_STRICT_CHECK_TOOLS(NM, nm)
3484 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3485 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3486 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3487 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3488 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3489 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3490 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3491 AC_SUBST(CC)
3492 AC_SUBST(CXX)
3493 AC_SUBST(CFLAGS)
3494 AC_SUBST(CXXFLAGS)
3495 AC_SUBST(PKG_CONFIG_PATH)
3496
3497 GCC_PLUGIN_OPTION(PLUGIN_OPTION)
3498 AR_PLUGIN_OPTION=
3499 RANLIB_PLUGIN_OPTION=
3500 if test -n "$PLUGIN_OPTION"; then
3501   if $AR --help 2>&1 | grep -q "\--plugin"; then
3502     AR_PLUGIN_OPTION="$PLUGIN_OPTION"
3503   fi
3504   if $RANLIB --help 2>&1 | grep -q "\--plugin"; then
3505     RANLIB_PLUGIN_OPTION="$PLUGIN_OPTION"
3506   fi
3507 else
3508   if test "$enable_pgo_build" != "no"; then
3509     AC_MSG_ERROR([AR with --plugin and rc is required for LTO build])
3510   fi
3511 fi
3512 AC_SUBST(AR_PLUGIN_OPTION)
3513 AC_SUBST(RANLIB_PLUGIN_OPTION)
3514
3515 # Target tools.
3516 AC_ARG_WITH([build-time-tools],
3517   [AS_HELP_STRING([--with-build-time-tools=PATH],
3518                   [use given path to find target tools during the build])],
3519   [case x"$withval" in
3520      x/*) ;;
3521      *)
3522        with_build_time_tools=
3523        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3524        ;;
3525    esac],
3526   [with_build_time_tools=])
3527
3528 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3529 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3530 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3531 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3532 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3533
3534 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3535 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3536 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3537 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3538 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3539 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3540 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3541 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3542 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3543 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3544 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3545 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3546 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3547
3548 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3549
3550 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3551 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3552 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3553 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3554 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3555                 [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],
3556                 c++)
3557 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3558                 [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],
3559                 c++)
3560 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3561 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3562 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3563                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3564 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3565                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3566 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3567 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3568 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3569 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3570 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3571 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3572 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3573 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3574 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3575 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3576
3577 AC_SUBST(FLAGS_FOR_TARGET)
3578 AC_SUBST(RAW_CXX_FOR_TARGET)
3579
3580 # Certain tools may need extra flags.
3581 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3582 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3583 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3584
3585 # When building target libraries, except in a Canadian cross, we use
3586 # the same toolchain as the compiler we just built.
3587 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3588 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3589 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3590 if test $host = $build; then
3591   case " $configdirs " in
3592     *" gcc "*)
3593       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3594       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3595       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3596       ;;
3597   esac
3598 fi
3599
3600 AC_SUBST(COMPILER_AS_FOR_TARGET)
3601 AC_SUBST(COMPILER_LD_FOR_TARGET)
3602 AC_SUBST(COMPILER_NM_FOR_TARGET)
3603
3604 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3605 AC_ARG_ENABLE(maintainer-mode,
3606 [AS_HELP_STRING([--enable-maintainer-mode],
3607                 [enable make rules and dependencies not useful
3608                  (and sometimes confusing) to the casual installer])],
3609       USE_MAINTAINER_MODE=$enableval,
3610       USE_MAINTAINER_MODE=no)
3611 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3612 AC_SUBST(MAINTAINER_MODE_TRUE)
3613 AC_SUBST(MAINTAINER_MODE_FALSE)
3614 if test "$USE_MAINTAINER_MODE" = yes; then
3615   MAINTAINER_MODE_TRUE=
3616   MAINTAINER_MODE_FALSE='#'
3617 else
3618   MAINTAINER_MODE_TRUE='#'
3619   MAINTAINER_MODE_FALSE=
3620 fi
3621 MAINT=$MAINTAINER_MODE_TRUE
3622 AC_SUBST(MAINT)dnl
3623
3624 # ---------------------
3625 # GCC bootstrap support
3626 # ---------------------
3627
3628 # Stage specific cflags for build.
3629 stage1_cflags="-g"
3630 case $build in
3631   vax-*-*)
3632     case ${GCC} in
3633       yes) stage1_cflags="-g -Wa,-J" ;;
3634       *) stage1_cflags="-g -J" ;;
3635     esac ;;
3636 esac
3637
3638 AC_SUBST(stage1_cflags)
3639
3640 # Enable --enable-checking in stage1 of the compiler.
3641 AC_ARG_ENABLE(stage1-checking,
3642 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3643                 [choose additional checking for stage1 of the compiler])],
3644 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3645 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3646   # For --disable-checking or implicit --enable-checking=release, avoid
3647   # setting --enable-checking=gc in the default stage1 checking for LTO
3648   # bootstraps.  See PR62077.
3649   case $BUILD_CONFIG in
3650     *lto*)
3651       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3652     *)
3653       stage1_checking=--enable-checking=yes,types;;
3654   esac
3655   if test "x$enable_checking" = x && \
3656      test -d ${srcdir}/gcc && \
3657      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3658     stage1_checking=--enable-checking=yes,types,extra
3659   fi
3660 else
3661   stage1_checking=--enable-checking=$enable_checking,types
3662 fi])
3663 AC_SUBST(stage1_checking)
3664
3665 # Enable -Werror in bootstrap stage2 and later.
3666 AC_ARG_ENABLE(werror,
3667 [AS_HELP_STRING([--enable-werror],
3668                 [enable -Werror in bootstrap stage2 and later])],
3669 [
3670 case ${enable_werror} in
3671   yes) stage2_werror_flag="--enable-werror-always" ;;
3672   *) stage2_werror_flag="" ;;
3673 esac
3674 ],
3675 [
3676 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3677   case $BUILD_CONFIG in
3678   bootstrap-debug)
3679       stage2_werror_flag="--enable-werror-always" ;;
3680   "")
3681       stage2_werror_flag="--enable-werror-always" ;;
3682   esac
3683 fi
3684 ])
3685
3686 AC_SUBST(stage2_werror_flag)
3687
3688 # Specify what files to not compare during bootstrap.
3689
3690 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3691 case "$target" in
3692   hppa*64*-*-hpux*) ;;
3693   hppa*-*-hpux*) compare_exclusions="gcc/cc*-checksum\$(objext) | */libgcc/lib2funcs* | gcc/ada/*tools/* | gcc/function-tests.o" ;;
3694   powerpc*-ibm-aix*) compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/* | *libgomp*\$(objext)" ;;
3695 esac
3696 AC_SUBST(compare_exclusions)
3697
3698 AC_CONFIG_FILES([Makefile],
3699   [sed "$extrasub_build" Makefile |
3700    sed "$extrasub_host" |
3701    sed "$extrasub_target" > mf$$
3702    mv -f mf$$ Makefile],
3703   [extrasub_build="$extrasub_build"
3704    extrasub_host="$extrasub_host"
3705    extrasub_target="$extrasub_target"])
3706 AC_OUTPUT