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 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([libtool.m4])
  27 m4_include([ltoptions.m4])
  28 m4_include([ltsugar.m4])
  29 m4_include([ltversion.m4])
  30 m4_include([lt~obsolete.m4])
  31 m4_include([config/isl.m4])
  32
  33 AC_INIT(move-if-change)
  34 AC_PREREQ(2.64)
  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"
 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 gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools"
 144
 145 # libgcj represents the runtime libraries only used by gcj.
 146 libgcj="target-libffi \
 147         target-zlib \
 148         target-libjava"
 149
 150 # these libraries are built for the target environment, and are built after
 151 # the host libraries and the host tools (which may be a cross compiler)
 152 # Note that libiberty is not a target library.
 153 target_libraries="target-libgcc \
 154                 target-libbacktrace \
 155                 target-libgloss \
 156                 target-newlib \
 157                 target-libgomp \
 158                 target-libcilkrts \
 159                 target-liboffloadmic \
 160                 target-libatomic \
 161                 target-libitm \
 162                 target-libstdc++-v3 \
 163                 target-libsanitizer \
 164                 target-libvtv \
 165                 target-libmpx \
 166                 target-libssp \
 167                 target-libquadmath \
 168                 target-libgfortran \
 169                 target-boehm-gc \
 170                 ${libgcj} \
 171                 target-libobjc \
 172                 target-libada \
 173                 target-libgo"
 174
 175 # these tools are built using the target libraries, and are intended to
 176 # run only in the target environment
 177 #
 178 # note: any program that *uses* libraries that are in the "target_libraries"
 179 # list belongs in this list.
 180 #
 181 target_tools="target-rda"
 182
 183 ################################################################################
 184
 185 ## All tools belong in one of the four categories, and are assigned above
 186 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 187 ## is important because configure will choke if they ever get through.
 188 ## ${configdirs} is directories we build using the host tools.
 189 ## ${target_configdirs} is directories we build using the target tools.
 190 configdirs=`echo ${host_libs} ${host_tools}`
 191 target_configdirs=`echo ${target_libraries} ${target_tools}`
 192 build_configdirs=`echo ${build_libs} ${build_tools}`
 193
 194 m4_divert_text([PARSE_ARGS],
 195 [case $srcdir in
 196   *" "*)
 197 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 198     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 199 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 200     ;;
 201 esac
 202 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 203 ])
 204
 205 ################################################################################
 206
 207 srcname="gnu development package"
 208
 209 # This gets set non-empty for some net releases of packages.
 210 appdirs=""
 211
 212 # Define is_cross_compiler to save on calls to 'test'.
 213 is_cross_compiler=
 214 if test x"${host}" = x"${target}" ; then
 215   is_cross_compiler=no
 216 else
 217   is_cross_compiler=yes
 218 fi
 219
 220 # Find the build and target subdir names.
 221 GCC_TOPLEV_SUBDIRS
 222 # Be sure to cover against remnants of an in-tree build.
 223 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 224   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 225 Use a pristine source tree when building in a separate tree])
 226 fi
 227
 228 # Skipdirs are removed silently.
 229 skipdirs=
 230 # Noconfigdirs are removed loudly.
 231 noconfigdirs=""
 232
 233 use_gnu_ld=
 234 # Make sure we don't let GNU ld be added if we didn't want it.
 235 if test x$with_gnu_ld = xno ; then
 236   use_gnu_ld=no
 237   noconfigdirs="$noconfigdirs ld gold"
 238 fi
 239
 240 use_gnu_as=
 241 # Make sure we don't let GNU as be added if we didn't want it.
 242 if test x$with_gnu_as = xno ; then
 243   use_gnu_as=no
 244   noconfigdirs="$noconfigdirs gas"
 245 fi
 246
 247 use_included_zlib=
 248 AC_ARG_WITH(system-zlib,
 249 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 250 # Make sure we don't let ZLIB be added if we didn't want it.
 251 if test x$with_system_zlib = xyes ; then
 252   use_included_zlib=no
 253   noconfigdirs="$noconfigdirs zlib"
 254 fi
 255
 256 # some tools are so dependent upon X11 that if we're not building with X,
 257 # it's not even worth trying to configure, much less build, that tool.
 258
 259 case ${with_x} in
 260   yes | "") ;; # the default value for this tree is that X11 is available
 261   no)
 262     skipdirs="${skipdirs} tk itcl libgui"
 263     # We won't be able to build gdbtk without X.
 264     enable_gdbtk=no
 265     ;;
 266   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 267 esac
 268
 269 # Some are only suitable for cross toolchains.
 270 # Remove these if host=target.
 271 cross_only="target-libgloss target-newlib target-opcodes"
 272
 273 case $is_cross_compiler in
 274   no) skipdirs="${skipdirs} ${cross_only}" ;;
 275 esac
 276
 277 # If both --with-headers and --with-libs are specified, default to
 278 # --without-newlib.
 279 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 280    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 281   if test x"${with_newlib}" = x ; then
 282     with_newlib=no
 283   fi
 284 fi
 285
 286 # Recognize --with-newlib/--without-newlib.
 287 case ${with_newlib} in
 288   no) skipdirs="${skipdirs} target-newlib" ;;
 289   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 290 esac
 291
 292 AC_ARG_ENABLE(as-accelerator-for,
 293 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 294                 [build as offload target compiler.
 295                 Specify offload host triple by ARG])])
 296
 297 AC_ARG_ENABLE(offload-targets,
 298 [AS_HELP_STRING([--enable-offload-targets=LIST],
 299                 [enable offloading to devices from comma-separated LIST of
 300                 TARGET[=DIR]. Use optional path to find offload target compiler
 301                 during the build])],
 302 [
 303   if test x"$enable_offload_targets" = x; then
 304     AC_MSG_ERROR([no offload targets specified])
 305   fi
 306 ], [enable_offload_targets=])
 307
 308 # Handle --enable-gold, --enable-ld.
 309 # --disable-gold [--enable-ld]
 310 #     Build only ld.  Default option.
 311 # --enable-gold [--enable-ld]
 312 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 313 #     as "ld.bfd" and "ld".
 314 # --enable-gold=default [--enable-ld]
 315 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 316 #     install ld as "ld.bfd".
 317 # --enable-gold[=default] --disable-ld
 318 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 319 # --enable-gold --enable-ld=default
 320 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 321 #     and ld.bfd).
 322 #     In other words, ld is default
 323 # --enable-gold=default --enable-ld=default
 324 #     Error.
 325
 326 default_ld=
 327 AC_ARG_ENABLE(gold,
 328 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 329                 [build gold @<:@ARG={default,yes,no}@:>@])],
 330 ENABLE_GOLD=$enableval,
 331 ENABLE_GOLD=no)
 332 case "${ENABLE_GOLD}" in
 333   yes|default)
 334     # Check for ELF target.
 335     is_elf=no
 336     case "${target}" in
 337       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 338       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 339       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 340       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 341         case "${target}" in
 342           *-*-linux*aout* | *-*-linux*oldld*)
 343             ;;
 344           *)
 345             is_elf=yes
 346             ;;
 347         esac
 348     esac
 349
 350     if test "$is_elf" = "yes"; then
 351       # Check for target supported by gold.
 352       case "${target}" in
 353         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 354         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-*)
 355           configdirs="$configdirs gold"
 356           if test x${ENABLE_GOLD} = xdefault; then
 357             default_ld=gold
 358           fi
 359           ENABLE_GOLD=yes
 360           ;;
 361       esac
 362     fi
 363     ;;
 364   no)
 365     ;;
 366   *)
 367     AC_MSG_ERROR([invalid --enable-gold argument])
 368     ;;
 369 esac
 370
 371 AC_ARG_ENABLE(ld,
 372 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 373                 [build ld @<:@ARG={default,yes,no}@:>@])],
 374 ENABLE_LD=$enableval,
 375 ENABLE_LD=yes)
 376
 377 case "${ENABLE_LD}" in
 378   default)
 379     if test x${default_ld} != x; then
 380       AC_MSG_ERROR([either gold or ld can be the default ld])
 381     fi
 382     ;;
 383   yes)
 384     ;;
 385   no)
 386     if test x${ENABLE_GOLD} != xyes; then
 387       AC_MSG_WARN([neither ld nor gold are enabled])
 388     fi
 389     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 390     ;;
 391   *)
 392     AC_MSG_ERROR([invalid --enable-ld argument])
 393     ;;
 394 esac
 395
 396 # PR gas/19109
 397 # Decide the default method for compressing debug sections.
 398 # Provide a configure time option to override our default.
 399 AC_ARG_ENABLE(compressed_debug_sections,
 400 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 401                 [Enable compressed debug sections for gas, gold or ld by
 402                  default])],
 403 [
 404   if test x"$enable_compressed_debug_sections" = xyes; then
 405     AC_MSG_ERROR([no program with compressed debug sections specified])
 406   fi
 407 ], [enable_compressed_debug_sections=])
 408
 409 # Configure extra directories which are host specific
 410
 411 case "${host}" in
 412   *-cygwin*)
 413     configdirs="$configdirs libtermcap" ;;
 414 esac
 415
 416 # A target can indicate whether a language isn't supported for some reason.
 417 # Only spaces may be used in this macro; not newlines or tabs.
 418 unsupported_languages=
 419
 420 # Remove more programs from consideration, based on the host or
 421 # target this usually means that a port of the program doesn't
 422 # exist yet.
 423
 424 case "${host}" in
 425   i[[3456789]]86-*-msdosdjgpp*)
 426     noconfigdirs="$noconfigdirs tcl tk itcl"
 427     ;;
 428 esac
 429
 430
 431 AC_ARG_ENABLE(libquadmath,
 432 AS_HELP_STRING([--disable-libquadmath],
 433   [do not build libquadmath directory]),
 434 ENABLE_LIBQUADMATH=$enableval,
 435 ENABLE_LIBQUADMATH=yes)
 436 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 437   noconfigdirs="$noconfigdirs target-libquadmath"
 438 fi
 439
 440
 441 AC_ARG_ENABLE(libquadmath-support,
 442 AS_HELP_STRING([--disable-libquadmath-support],
 443   [disable libquadmath support for Fortran]),
 444 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 445 ENABLE_LIBQUADMATH_SUPPORT=yes)
 446 enable_libquadmath_support=
 447 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 448   enable_libquadmath_support=no
 449 fi
 450
 451
 452 AC_ARG_ENABLE(libada,
 453 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 454 ENABLE_LIBADA=$enableval,
 455 ENABLE_LIBADA=yes)
 456 if test "${ENABLE_LIBADA}" != "yes" ; then
 457   noconfigdirs="$noconfigdirs gnattools"
 458 fi
 459
 460 AC_ARG_ENABLE(libssp,
 461 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 462 ENABLE_LIBSSP=$enableval,
 463 ENABLE_LIBSSP=yes)
 464
 465 AC_ARG_ENABLE(libstdcxx,
 466 AS_HELP_STRING([--disable-libstdcxx],
 467   [do not build libstdc++-v3 directory]),
 468 ENABLE_LIBSTDCXX=$enableval,
 469 ENABLE_LIBSTDCXX=default)
 470 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 471   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 472 fi]
 473
 474 # If this is accelerator compiler and its target is intelmic we enable
 475 # target liboffloadmic by default.  If this is compiler with offloading
 476 # for intelmic we enable host liboffloadmic by default.  Otherwise
 477 # liboffloadmic is disabled by default.
 478 AC_ARG_ENABLE([liboffloadmic],
 479 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 480                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 481 [case "$enableval" in
 482   no | host | target)
 483     enable_liboffloadmic=$enableval ;;
 484   *)
 485     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 486 esac],
 487 [if test x"$enable_as_accelerator_for" != x; then
 488   case "${target}" in
 489     *-intelmic-* | *-intelmicemul-*)
 490       enable_liboffloadmic=target
 491       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 492       ;;
 493     *)
 494       enable_liboffloadmic=no
 495       ;;
 496   esac
 497 else
 498   case "${enable_offload_targets}" in
 499     *-intelmic-* | *-intelmicemul-*)
 500       enable_liboffloadmic=host
 501       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 502       ;;
 503     *)
 504       enable_liboffloadmic=no
 505       ;;
 506     esac
 507 fi])
 508 AC_SUBST(extra_liboffloadmic_configure_flags)
 509
 510 # Save it here so that, even in case of --enable-libgcj, if the Java
 511 # front-end isn't enabled, we still get libgcj disabled.
 512 libgcj_saved=$libgcj
 513 case $enable_libgcj in
 514 yes)
 515   # If we reset it here, it won't get added to noconfigdirs in the
 516   # target-specific build rules, so it will be forcibly enabled
 517   # (unless the Java language itself isn't enabled).
 518   libgcj=
 519   ;;
 520 no)
 521   # Make sure we get it printed in the list of not supported target libs.
 522   # Don't disable libffi, though, other languages use it.
 523   noconfigdirs="$noconfigdirs `echo ${libgcj} | sed -e 's/target-libffi//'`"
 524   # Clear libgcj_saved so that even if java is enabled libffi won't be
 525   # built.
 526   libgcj_saved=
 527   ;;
 528 esac
 529
 530 AC_ARG_ENABLE(static-libjava,
 531 [AS_HELP_STRING([[--enable-static-libjava[=ARG]]],
 532                 [build static libjava @<:@default=no@:>@])],
 533 ENABLE_STATIC_LIBJAVA=$enableval,
 534 ENABLE_STATIC_LIBJAVA=no)
 535 enable_static_libjava=
 536 if test "${ENABLE_STATIC_LIBJAVA}" = "yes" ; then
 537   enable_static_libjava=yes
 538 fi
 539
 540 if test x$enable_static_libjava != xyes ; then
 541   EXTRA_CONFIGARGS_LIBJAVA=--disable-static
 542 fi
 543 AC_SUBST(EXTRA_CONFIGARGS_LIBJAVA)
 544
 545 # Enable libgomp by default on hosted POSIX systems, and a few others.
 546 if test x$enable_libgomp = x ; then
 547     case "${target}" in
 548     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 549         ;;
 550     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 551         ;;
 552     *-*-solaris2* | *-*-hpux11*)
 553         ;;
 554     *-*-darwin* | *-*-aix*)
 555         ;;
 556     nvptx*-*-*)
 557         ;;
 558     *)
 559         noconfigdirs="$noconfigdirs target-libgomp"
 560         ;;
 561     esac
 562 fi
 563
 564 # Disable libatomic on unsupported systems.
 565 if test -d ${srcdir}/libatomic; then
 566     if test x$enable_libatomic = x; then
 567         AC_MSG_CHECKING([for libatomic support])
 568         if (srcdir=${srcdir}/libatomic; \
 569                 . ${srcdir}/configure.tgt; \
 570                 test -n "$UNSUPPORTED")
 571         then
 572             AC_MSG_RESULT([no])
 573             noconfigdirs="$noconfigdirs target-libatomic"
 574         else
 575             AC_MSG_RESULT([yes])
 576         fi
 577     fi
 578 fi
 579
 580 # Disable libcilkrts on unsupported systems.
 581 if test -d ${srcdir}/libcilkrts; then
 582     if test x$enable_libcilkrts = x; then
 583         AC_MSG_CHECKING([for libcilkrts support])
 584         if (srcdir=${srcdir}/libcilkrts; \
 585                 . ${srcdir}/configure.tgt; \
 586                 test -n "$UNSUPPORTED")
 587         then
 588             AC_MSG_RESULT([no])
 589             noconfigdirs="$noconfigdirs target-libcilkrts"
 590         else
 591             AC_MSG_RESULT([yes])
 592         fi
 593     fi
 594 fi
 595
 596 # Disable liboffloadmic on unsupported systems.
 597 if test -d ${srcdir}/liboffloadmic; then
 598     if test x$enable_liboffloadmic != xno; then
 599         AC_MSG_CHECKING([for liboffloadmic support])
 600         if (srcdir=${srcdir}/liboffloadmic; \
 601                 . ${srcdir}/configure.tgt; \
 602                 test -n "$UNSUPPORTED")
 603         then
 604             AC_MSG_RESULT([no])
 605             noconfigdirs="$noconfigdirs target-liboffloadmic"
 606         else
 607             AC_MSG_RESULT([yes])
 608         fi
 609     fi
 610 fi
 611
 612 # Disable libitm on unsupported systems.
 613 if test -d ${srcdir}/libitm; then
 614     if test x$enable_libitm = x; then
 615         AC_MSG_CHECKING([for libitm support])
 616         if (srcdir=${srcdir}/libitm; \
 617                 . ${srcdir}/configure.tgt; \
 618                 test -n "$UNSUPPORTED")
 619         then
 620             AC_MSG_RESULT([no])
 621             noconfigdirs="$noconfigdirs target-libitm"
 622         else
 623             AC_MSG_RESULT([yes])
 624         fi
 625     fi
 626 fi
 627
 628 # Disable libsanitizer on unsupported systems.
 629 if test -d ${srcdir}/libsanitizer; then
 630     if test x$enable_libsanitizer = x; then
 631         AC_MSG_CHECKING([for libsanitizer support])
 632         if (srcdir=${srcdir}/libsanitizer; \
 633                 . ${srcdir}/configure.tgt; \
 634                 test -n "$UNSUPPORTED")
 635         then
 636             AC_MSG_RESULT([no])
 637             noconfigdirs="$noconfigdirs target-libsanitizer"
 638         else
 639             AC_MSG_RESULT([yes])
 640         fi
 641     fi
 642 fi
 643
 644 # Disable libvtv on unsupported systems.
 645 if test -d ${srcdir}/libvtv; then
 646     if test x$enable_libvtv = x; then
 647         AC_MSG_CHECKING([for libvtv support])
 648         if (srcdir=${srcdir}/libvtv; \
 649                 . ${srcdir}/configure.tgt; \
 650                 test "$VTV_SUPPORTED" != "yes")
 651         then
 652             AC_MSG_RESULT([no])
 653             noconfigdirs="$noconfigdirs target-libvtv"
 654         else
 655             AC_MSG_RESULT([yes])
 656         fi
 657     fi
 658 fi
 659
 660
 661 # Enable libmpx on supported systems by request.
 662 if test -d ${srcdir}/libmpx; then
 663     if test x$enable_libmpx = x; then
 664        AC_MSG_CHECKING([for libmpx support])
 665        if (srcdir=${srcdir}/libmpx; \
 666                . ${srcdir}/configure.tgt; \
 667                test "$LIBMPX_SUPPORTED" != "yes")
 668        then
 669            AC_MSG_RESULT([no])
 670            noconfigdirs="$noconfigdirs target-libmpx"
 671        else
 672            AC_MSG_RESULT([yes])
 673        fi
 674     fi
 675 fi
 676
 677
 678
 679 # Disable libquadmath for some systems.
 680 case "${target}" in
 681   avr-*-*)
 682     noconfigdirs="$noconfigdirs target-libquadmath"
 683     ;;
 684   # libquadmath is unused on AIX and libquadmath build process use of
 685   # LD_LIBRARY_PATH can break AIX bootstrap.
 686   powerpc-*-aix* | rs6000-*-aix*)
 687     noconfigdirs="$noconfigdirs target-libquadmath"
 688     ;;
 689 esac
 690
 691 # Disable libssp for some systems.
 692 case "${target}" in
 693   avr-*-*)
 694     # No hosted I/O support.
 695     noconfigdirs="$noconfigdirs target-libssp"
 696     ;;
 697   powerpc-*-aix* | rs6000-*-aix*)
 698     noconfigdirs="$noconfigdirs target-libssp"
 699     ;;
 700   rl78-*-*)
 701     # libssp uses a misaligned load to trigger a fault, but the RL78
 702     # doesn't fault for those - instead, it gives a build-time error
 703     # for explicit misaligned loads.
 704     noconfigdirs="$noconfigdirs target-libssp"
 705     ;;
 706   visium-*-*)
 707     # No hosted I/O support.
 708     noconfigdirs="$noconfigdirs target-libssp"
 709     ;;
 710 esac
 711
 712 # Disable libstdc++-v3 for some systems.
 713 # Allow user to override this if they pass --enable-libstdc++-v3
 714 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 715   case "${target}" in
 716     *-*-vxworks*)
 717       # VxWorks uses the Dinkumware C++ library.
 718       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 719       ;;
 720     arm*-wince-pe*)
 721       # the C++ libraries don't build on top of CE's C libraries
 722       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 723       ;;
 724     avr-*-*)
 725       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 726       ;;
 727     ft32-*-*)
 728       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 729       ;;
 730   esac
 731 fi
 732
 733 # Disable Fortran for some systems.
 734 case "${target}" in
 735   mmix-*-*)
 736     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 737     unsupported_languages="$unsupported_languages fortran"
 738     ;;
 739 esac
 740
 741 # Disable Java if libffi is not supported.
 742 case "${target}" in
 743   aarch64-*-*)
 744     ;;
 745   alpha*-*-*)
 746     ;;
 747   arm*-*-*)
 748     ;;
 749   cris-*-*)
 750     ;;
 751   frv-*-*)
 752     ;;
 753   hppa*-*-linux*)
 754     ;;
 755   hppa*-*-hpux*)
 756     ;;
 757   i?86-*-*)
 758     ;;
 759   ia64*-*-*)
 760     ;;
 761   m32r*-*-*)
 762     ;;
 763   m68k-*-*)
 764     ;;
 765   mips*-*-rtems*)
 766     ;;
 767   mips*-*-linux*)
 768     ;;
 769   powerpc*-*-linux*)
 770     ;;
 771   powerpc-*-darwin*)
 772     ;;
 773   powerpc-*-aix* | rs6000-*-aix*)
 774     ;;
 775   powerpc-*-freebsd*)
 776     ;;
 777   powerpc64-*-freebsd*)
 778     ;;
 779   powerpc*-*-rtems*)
 780     ;;
 781   s390-*-* | s390x-*-*)
 782     ;;
 783   sh-*-* | sh[[34]]*-*-*)
 784     ;;
 785   sh64-*-* | sh5*-*-*)
 786     ;;
 787   sparc*-*-*)
 788     ;;
 789   x86_64-*-*)
 790     ;;
 791   *-*-*)
 792     unsupported_languages="$unsupported_languages java"
 793     ;;
 794 esac
 795
 796 # Disable Java, libgcj or related libraries for some systems.
 797 case "${target}" in
 798   powerpc-*-darwin*)
 799     ;;
 800   i[[3456789]]86-*-darwin*)
 801     ;;
 802   x86_64-*-darwin[[912]]*)
 803     ;;
 804   *-*-darwin*)
 805     noconfigdirs="$noconfigdirs ${libgcj}"
 806     ;;
 807   *-*-netware*)
 808     noconfigdirs="$noconfigdirs ${libgcj}"
 809     ;;
 810   *-*-rtems*)
 811     noconfigdirs="$noconfigdirs ${libgcj}"
 812     ;;
 813   *-*-tpf*)
 814     noconfigdirs="$noconfigdirs ${libgcj}"
 815     ;;
 816   *-*-uclinux*)
 817     noconfigdirs="$noconfigdirs ${libgcj}"
 818     ;;
 819   *-*-vxworks*)
 820     noconfigdirs="$noconfigdirs ${libgcj}"
 821     ;;
 822   alpha*-*-*vms*)
 823     noconfigdirs="$noconfigdirs ${libgcj}"
 824     ;;
 825   arm*-*-freebsd*)
 826     noconfigdirs="$noconfigdirs ${libgcj}"
 827     ;;
 828   arm-wince-pe)
 829     noconfigdirs="$noconfigdirs ${libgcj}"
 830     ;;
 831   arm*-*-symbianelf*)
 832     noconfigdirs="$noconfigdirs ${libgcj}"
 833     ;;
 834   bfin-*-*)
 835     noconfigdirs="$noconfigdirs target-boehm-gc"
 836     ;;
 837   cris-*-* | crisv32-*-*)
 838     unsupported_languages="$unsupported_languages java"
 839     case "${target}" in
 840       *-*-linux*)
 841         ;;
 842       *) # See PR46792 regarding target-libffi.
 843         noconfigdirs="$noconfigdirs target-libffi target-boehm-gc";;
 844     esac
 845     ;;
 846   hppa*64*-*-linux*)
 847     # In this case, it's because the hppa64-linux target is for
 848     # the kernel only at this point and has no libc, and thus no
 849     # headers, crt*.o, etc., all of which are needed by these.
 850     unsupported_languages="$unsupported_languages java"
 851     ;;
 852   hppa*64*-*-hpux*)
 853     noconfigdirs="$noconfigdirs ${libgcj}"
 854     ;;
 855   hppa*-hp-hpux11*)
 856     ;;
 857   hppa*-*-hpux*)
 858     # According to Alexandre Oliva <aoliva@redhat.com>, libjava won't
 859     # build on HP-UX 10.20.
 860     noconfigdirs="$noconfigdirs ${libgcj}"
 861     ;;
 862   ia64*-*-*vms*)
 863     noconfigdirs="$noconfigdirs ${libgcj}"
 864     ;;
 865   i[[3456789]]86-w64-mingw*)
 866     noconfigdirs="$noconfigdirs ${libgcj}"
 867     ;;
 868   i[[3456789]]86-*-mingw*)
 869     noconfigdirs="$noconfigdirs ${libgcj}"
 870     ;;
 871   x86_64-*-mingw*)
 872     noconfigdirs="$noconfigdirs ${libgcj}"
 873     ;;
 874   mmix-*-*)
 875     noconfigdirs="$noconfigdirs target-libffi target-boehm-gc"
 876     ;;
 877   powerpc-*-aix*)
 878     # copied from rs6000-*-* entry
 879     noconfigdirs="$noconfigdirs ${libgcj}"
 880     ;;
 881   rs6000-*-aix*)
 882     noconfigdirs="$noconfigdirs ${libgcj}"
 883     ;;
 884   ft32-*-*)
 885     noconfigdirs="$noconfigdirs ${libgcj}"
 886     ;;
 887   *-*-lynxos*)
 888     noconfigdirs="$noconfigdirs ${libgcj}"
 889     ;;
 890 esac
 891
 892 # Disable the go frontend on systems where it is known to not work. Please keep
 893 # this in sync with contrib/config-list.mk.
 894 case "${target}" in
 895 *-*-darwin* | *-*-cygwin* | *-*-mingw* | *-*-aix*)
 896     unsupported_languages="$unsupported_languages go"
 897     ;;
 898 esac
 899
 900 # Disable libgo for some systems where it is known to not work.
 901 # For testing, you can easily override this with --enable-libgo.
 902 if test x$enable_libgo = x; then
 903     case "${target}" in
 904     *-*-darwin*)
 905         # PR 46986
 906         noconfigdirs="$noconfigdirs target-libgo"
 907         ;;
 908     *-*-cygwin* | *-*-mingw*)
 909         noconfigdirs="$noconfigdirs target-libgo"
 910         ;;
 911     *-*-aix*)
 912         noconfigdirs="$noconfigdirs target-libgo"
 913         ;;
 914     esac
 915 fi
 916
 917 # Default libgloss CPU subdirectory.
 918 libgloss_dir="$target_cpu"
 919
 920 case "${target}" in
 921   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 922     libgloss_dir=wince
 923     ;;
 924   aarch64*-*-* )
 925     libgloss_dir=aarch64
 926     ;;
 927   arm*-*-*)
 928     libgloss_dir=arm
 929     ;;
 930   cris-*-* | crisv32-*-*)
 931     libgloss_dir=cris
 932     ;;
 933   hppa*-*-*)
 934     libgloss_dir=pa
 935     ;;
 936   i[[3456789]]86-*-*)
 937     libgloss_dir=i386
 938     ;;
 939   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 940     libgloss_dir=m68hc11
 941     ;;
 942   m68*-*-* | fido-*-*)
 943     libgloss_dir=m68k
 944     ;;
 945   mips*-*-*)
 946     libgloss_dir=mips
 947     ;;
 948   powerpc*-*-*)
 949     libgloss_dir=rs6000
 950     ;;
 951   sparc*-*-*)
 952     libgloss_dir=sparc
 953     ;;
 954 esac
 955
 956 # Disable newlib and libgloss for various target OSes.
 957 case "${target}" in
 958   alpha*-dec-osf*)
 959     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 960     ;;
 961   i[[3456789]]86-*-linux*)
 962     # This section makes it possible to build newlib natively on linux.
 963     # If we are using a cross compiler then don't configure newlib.
 964     if test x${is_cross_compiler} != xno ; then
 965       noconfigdirs="$noconfigdirs target-newlib"
 966     fi
 967     noconfigdirs="$noconfigdirs target-libgloss"
 968     # If we are not using a cross compiler, do configure newlib.
 969     # Note however, that newlib will only be configured in this situation
 970     # if the --with-newlib option has been given, because otherwise
 971     # 'target-newlib' will appear in skipdirs.
 972     ;;
 973   i[[3456789]]86-*-rdos*)
 974     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 975     ;;
 976   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 977     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 978     ;;
 979   sparc-*-sunos4*)
 980     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 981     ;;
 982   *-*-aix*)
 983     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 984     ;;
 985   *-*-beos*)
 986     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 987     ;;
 988   *-*-chorusos)
 989     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 990     ;;
 991   *-*-dragonfly*)
 992     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 993     ;;
 994   *-*-freebsd*)
 995     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 996     ;;
 997   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 998     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 999     ;;
1000   *-*-lynxos*)
1001     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1002     ;;
1003   *-*-mingw*)
1004     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1005     ;;
1006   *-*-netbsd*)
1007     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1008     ;;
1009   *-*-netware*)
1010     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1011     ;;
1012   *-*-tpf*)
1013     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1014     ;;
1015   *-*-uclinux*)
1016     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1017     ;;
1018   *-*-vxworks*)
1019     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1020     ;;
1021 esac
1022
1023 case "${target}" in
1024   *-*-chorusos)
1025     ;;
1026   aarch64-*-darwin*)
1027     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1028     noconfigdirs="$noconfigdirs sim target-rda"
1029     ;;
1030   arm-*-darwin*)
1031     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1032     noconfigdirs="$noconfigdirs sim target-rda"
1033     ;;
1034   powerpc-*-darwin*)
1035     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1036     noconfigdirs="$noconfigdirs sim target-rda"
1037     ;;
1038   i[[3456789]]86-*-darwin*)
1039     noconfigdirs="$noconfigdirs ld gprof"
1040     noconfigdirs="$noconfigdirs sim target-rda"
1041     ;;
1042   x86_64-*-darwin[[912]]*)
1043     noconfigdirs="$noconfigdirs ld gas gprof"
1044     noconfigdirs="$noconfigdirs sim target-rda"
1045     ;;
1046   *-*-darwin*)
1047     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1048     noconfigdirs="$noconfigdirs sim target-rda"
1049     ;;
1050   *-*-dragonfly*)
1051     ;;
1052   *-*-freebsd*)
1053     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
1054         && test -f /usr/local/include/gmp.h; then
1055       with_gmp=/usr/local
1056     fi
1057     ;;
1058   *-*-kaos*)
1059     # Remove unsupported stuff on all kaOS configurations.
1060     noconfigdirs="$noconfigdirs target-libgloss"
1061     ;;
1062   *-*-netbsd*)
1063     ;;
1064   *-*-netware*)
1065     ;;
1066   *-*-rtems*)
1067     noconfigdirs="$noconfigdirs target-libgloss"
1068     # this is not caught below because this stanza matches earlier
1069     case $target in
1070       or1k*-*-*) noconfigdirs="$noconfigdirs gdb" ;;
1071     esac
1072     ;;
1073     # The tpf target doesn't support gdb yet.
1074   *-*-tpf*)
1075     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
1076     ;;
1077   *-*-uclinux*)
1078     noconfigdirs="$noconfigdirs target-rda"
1079     ;;
1080   *-*-vxworks*)
1081     ;;
1082   alpha*-dec-osf*)
1083     # ld works, but does not support shared libraries.
1084     # gas doesn't generate exception information.
1085     noconfigdirs="$noconfigdirs gas ld"
1086     ;;
1087   alpha*-*-*vms*)
1088     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1089     ;;
1090   alpha*-*-*)
1091     # newlib is not 64 bit ready
1092     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1093     ;;
1094   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1095     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1096     ;;
1097   arc-*-*|arceb-*-*)
1098     noconfigdirs="$noconfigdirs target-libgloss"
1099     ;;
1100   arm-*-pe*)
1101     noconfigdirs="$noconfigdirs target-libgloss"
1102     ;;
1103   arm-*-riscix*)
1104     noconfigdirs="$noconfigdirs ld target-libgloss"
1105     ;;
1106   avr-*-rtems*)
1107     ;;
1108   avr-*-*)
1109     if test x${with_avrlibc} != xno; then
1110       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1111     fi
1112     ;;
1113   c4x-*-* | tic4x-*-*)
1114     noconfigdirs="$noconfigdirs target-libgloss"
1115     ;;
1116   tic54x-*-*)
1117     noconfigdirs="$noconfigdirs target-libgloss gdb"
1118     ;;
1119   d10v-*-*)
1120     noconfigdirs="$noconfigdirs target-libgloss"
1121     ;;
1122   d30v-*-*)
1123     noconfigdirs="$noconfigdirs gdb"
1124     ;;
1125   fr30-*-elf*)
1126     noconfigdirs="$noconfigdirs gdb"
1127     ;;
1128   ft32-*-*)
1129     noconfigdirs="$noconfigdirs target-rda gprof"
1130     ;;
1131   moxie-*-*)
1132     noconfigdirs="$noconfigdirs"
1133     ;;
1134   h8300*-*-*)
1135     noconfigdirs="$noconfigdirs target-libgloss"
1136     ;;
1137   h8500-*-*)
1138     noconfigdirs="$noconfigdirs target-libgloss"
1139     ;;
1140   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1141     ;;
1142   hppa*64*-*-hpux*)
1143     noconfigdirs="$noconfigdirs gdb"
1144     ;;
1145   hppa*-*-hpux11*)
1146     noconfigdirs="$noconfigdirs gdb ld"
1147     ;;
1148   hppa*64*-*-linux*)
1149     ;;
1150   hppa*-*-linux*)
1151     ;;
1152   hppa*-*-*elf* | \
1153   hppa*-*-lites* | \
1154   hppa*-*-openbsd* | \
1155   hppa*64*-*-*)
1156     ;;
1157   hppa*-*-pro*)
1158     ;;
1159   hppa*-*-*)
1160     noconfigdirs="$noconfigdirs ld"
1161     ;;
1162   i960-*-*)
1163     noconfigdirs="$noconfigdirs gdb"
1164     ;;
1165   ia64*-*-elf*)
1166     # No gdb support yet.
1167     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1168     ;;
1169   ia64*-**-hpux*)
1170     # No ld support yet.
1171     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1172     ;;
1173   ia64*-*-*vms*)
1174     # No ld support yet.
1175     noconfigdirs="$noconfigdirs libgui itcl ld"
1176     ;;
1177   i[[3456789]]86-w64-mingw*)
1178     ;;
1179   i[[3456789]]86-*-mingw*)
1180     target_configdirs="$target_configdirs target-winsup"
1181     ;;
1182   *-*-cygwin*)
1183     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1184     noconfigdirs="$noconfigdirs target-libgloss"
1185     # always build newlib if winsup directory is present.
1186     if test -d "$srcdir/winsup/cygwin"; then
1187       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1188     elif test -d "$srcdir/newlib"; then
1189       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1190     fi
1191     ;;
1192   i[[3456789]]86-*-pe)
1193     noconfigdirs="$noconfigdirs target-libgloss"
1194     ;;
1195   i[[3456789]]86-*-sco3.2v5*)
1196     # The linker does not yet know about weak symbols in COFF,
1197     # and is not configured to handle mixed ELF and COFF.
1198     noconfigdirs="$noconfigdirs ld target-libgloss"
1199     ;;
1200   i[[3456789]]86-*-sco*)
1201     noconfigdirs="$noconfigdirs gprof target-libgloss"
1202     ;;
1203   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1204     noconfigdirs="$noconfigdirs target-libgloss"
1205     ;;
1206   i[[3456789]]86-*-sysv4*)
1207     noconfigdirs="$noconfigdirs target-libgloss"
1208     ;;
1209   i[[3456789]]86-*-beos*)
1210     noconfigdirs="$noconfigdirs gdb"
1211     ;;
1212   i[[3456789]]86-*-rdos*)
1213     noconfigdirs="$noconfigdirs gdb"
1214     ;;
1215   mmix-*-*)
1216     noconfigdirs="$noconfigdirs gdb"
1217     ;;
1218   mt-*-*)
1219     noconfigdirs="$noconfigdirs sim"
1220     ;;
1221   powerpc-*-aix*)
1222     # copied from rs6000-*-* entry
1223     noconfigdirs="$noconfigdirs gprof"
1224     ;;
1225   powerpc*-*-winnt* | powerpc*-*-pe*)
1226     target_configdirs="$target_configdirs target-winsup"
1227     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1228     # always build newlib.
1229     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1230     ;;
1231     # This is temporary until we can link against shared libraries
1232   powerpcle-*-solaris*)
1233     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1234     ;;
1235   powerpc-*-beos*)
1236     noconfigdirs="$noconfigdirs gdb"
1237     ;;
1238   rs6000-*-lynxos*)
1239     noconfigdirs="$noconfigdirs gprof"
1240     ;;
1241   rs6000-*-aix*)
1242     noconfigdirs="$noconfigdirs gprof"
1243     ;;
1244   rs6000-*-*)
1245     noconfigdirs="$noconfigdirs gprof"
1246     ;;
1247   m68k-apollo-*)
1248     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1249     ;;
1250   microblaze*)
1251     noconfigdirs="$noconfigdirs gprof"
1252     ;;
1253   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1254     if test x$with_newlib = xyes; then
1255       noconfigdirs="$noconfigdirs gprof"
1256     fi
1257     ;;
1258   mips*-*-irix5*)
1259     noconfigdirs="$noconfigdirs gprof target-libgloss"
1260     ;;
1261   mips*-*-irix6*)
1262     noconfigdirs="$noconfigdirs gprof target-libgloss"
1263     ;;
1264   mips*-*-bsd*)
1265     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1266     ;;
1267   mips*-*-linux*)
1268     ;;
1269   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1270   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1271     noconfigdirs="$noconfigdirs ld gas gprof"
1272     ;;
1273   mips*-*-*)
1274     noconfigdirs="$noconfigdirs gprof"
1275     ;;
1276   nds32*-*-*)
1277     noconfigdirs="$noconfigdirs gdb"
1278     ;;
1279   nvptx*-*-*)
1280     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1281     ;;
1282   or1k*-*-*)
1283     noconfigdirs="$noconfigdirs gdb"
1284     ;;
1285   sh-*-* | sh64-*-*)
1286     case "${target}" in
1287       sh*-*-elf)
1288          ;;
1289       *)
1290          noconfigdirs="$noconfigdirs target-libgloss" ;;
1291     esac
1292     ;;
1293   sparc-*-sunos4*)
1294     if test x${is_cross_compiler} = xno ; then
1295            use_gnu_ld=no
1296     fi
1297     ;;
1298   tic6x-*-*)
1299     noconfigdirs="$noconfigdirs sim"
1300     ;;
1301   tilegx*-*-*)
1302     noconfigdirs="$noconfigdirs sim"
1303     ;;
1304   tilepro*-*-*)
1305     noconfigdirs="$noconfigdirs gdb sim"
1306     ;;
1307   v810-*-*)
1308     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1309     ;;
1310   vax-*-*)
1311     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1312     ;;
1313 esac
1314
1315 # If we aren't building newlib, then don't build libgloss, since libgloss
1316 # depends upon some newlib header files.
1317 case "${noconfigdirs}" in
1318   *target-libgloss*) ;;
1319   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1320 esac
1321
1322 # Work in distributions that contain no compiler tools, like Autoconf.
1323 host_makefile_frag=/dev/null
1324 if test -d ${srcdir}/config ; then
1325 case "${host}" in
1326   i[[3456789]]86-*-msdosdjgpp*)
1327     host_makefile_frag="config/mh-djgpp"
1328     ;;
1329   *-cygwin*)
1330     ACX_CHECK_CYGWIN_CAT_WORKS
1331     host_makefile_frag="config/mh-cygwin"
1332     ;;
1333   *-mingw*)
1334     host_makefile_frag="config/mh-mingw"
1335     ;;
1336   alpha*-linux*)
1337     host_makefile_frag="config/mh-alpha-linux"
1338     ;;
1339   hppa*-hp-hpux10*)
1340     host_makefile_frag="config/mh-pa-hpux10"
1341     ;;
1342   hppa*-hp-hpux*)
1343     host_makefile_frag="config/mh-pa"
1344     ;;
1345   hppa*-*)
1346     host_makefile_frag="config/mh-pa"
1347     ;;
1348   *-*-darwin*)
1349     host_makefile_frag="config/mh-darwin"
1350     ;;
1351   powerpc-*-aix*)
1352     host_makefile_frag="config/mh-ppc-aix"
1353     ;;
1354   rs6000-*-aix*)
1355     host_makefile_frag="config/mh-ppc-aix"
1356     ;;
1357 esac
1358 fi
1359
1360 if test "${build}" != "${host}" ; then
1361   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1362   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1363   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1364   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1365   GCJ_FOR_BUILD=${GCJ_FOR_BUILD-gcj}
1366   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1367   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1368   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1369   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1370   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1371   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1372   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1373   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1374 else
1375   AR_FOR_BUILD="\$(AR)"
1376   AS_FOR_BUILD="\$(AS)"
1377   CC_FOR_BUILD="\$(CC)"
1378   CXX_FOR_BUILD="\$(CXX)"
1379   GCJ_FOR_BUILD="\$(GCJ)"
1380   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1381   GOC_FOR_BUILD="\$(GOC)"
1382   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1383   LD_FOR_BUILD="\$(LD)"
1384   NM_FOR_BUILD="\$(NM)"
1385   RANLIB_FOR_BUILD="\$(RANLIB)"
1386   WINDRES_FOR_BUILD="\$(WINDRES)"
1387   WINDMC_FOR_BUILD="\$(WINDMC)"
1388 fi
1389
1390 AC_PROG_CC
1391 AC_PROG_CXX
1392
1393 # We must set the default linker to the linker used by gcc for the correct
1394 # operation of libtool.  If LD is not defined and we are using gcc, try to
1395 # set the LD default to the ld used by gcc.
1396 if test -z "$LD"; then
1397   if test "$GCC" = yes; then
1398     case $build in
1399     *-*-mingw*)
1400       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1401     *)
1402       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1403     esac
1404     case $gcc_prog_ld in
1405     # Accept absolute paths.
1406     [[\\/]* | [A-Za-z]:[\\/]*)]
1407       LD="$gcc_prog_ld" ;;
1408     esac
1409   fi
1410 fi
1411
1412 # Check whether -static-libstdc++ -static-libgcc is supported.
1413 have_static_libs=no
1414 if test "$GCC" = yes; then
1415   saved_LDFLAGS="$LDFLAGS"
1416
1417   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1418   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1419   AC_LANG_PUSH(C++)
1420   AC_LINK_IFELSE([
1421 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1422 #error -static-libstdc++ not implemented
1423 #endif
1424 int main() {}],
1425     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1426     [AC_MSG_RESULT([no])])
1427   AC_LANG_POP(C++)
1428
1429   LDFLAGS="$saved_LDFLAGS"
1430 fi
1431
1432 ACX_PROG_GNAT
1433 ACX_PROG_CMP_IGNORE_INITIAL
1434
1435 AC_ARG_ENABLE([bootstrap],
1436 [AS_HELP_STRING([--enable-bootstrap],
1437                 [enable bootstrapping @<:@yes if native build@:>@])],,
1438 enable_bootstrap=default)
1439
1440 # Issue errors and warnings for invalid/strange bootstrap combinations.
1441 if test -r $srcdir/gcc/configure; then
1442   have_compiler=yes
1443 else
1444   have_compiler=no
1445 fi
1446
1447 case "$have_compiler:$host:$target:$enable_bootstrap" in
1448   *:*:*:no) ;;
1449
1450   # Default behavior.  Enable bootstrap if we have a compiler
1451   # and we are in a native configuration.
1452   yes:$build:$build:default)
1453     enable_bootstrap=yes ;;
1454
1455   *:*:*:default)
1456     enable_bootstrap=no ;;
1457
1458   # We have a compiler and we are in a native configuration, bootstrap is ok
1459   yes:$build:$build:yes)
1460     ;;
1461
1462   # Other configurations, but we have a compiler.  Assume the user knows
1463   # what he's doing.
1464   yes:*:*:yes)
1465     AC_MSG_WARN([trying to bootstrap a cross compiler])
1466     ;;
1467
1468   # No compiler: if they passed --enable-bootstrap explicitly, fail
1469   no:*:*:yes)
1470     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1471
1472   # Fail if wrong command line
1473   *)
1474     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1475     ;;
1476 esac
1477
1478 # When bootstrapping with GCC, build stage 1 in C++98 mode to ensure that a
1479 # C++98 compiler can still start the bootstrap.
1480 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1481   CXX="$CXX -std=gnu++98"
1482 fi
1483
1484 # Used for setting $lt_cv_objdir
1485 _LT_CHECK_OBJDIR
1486
1487 # Check for GMP, MPFR and MPC
1488 gmplibs="-lmpc -lmpfr -lgmp"
1489 gmpinc=
1490 have_gmp=no
1491
1492 # Specify a location for mpc
1493 # check for this first so it ends up on the link line before mpfr.
1494 AC_ARG_WITH(mpc,
1495 [AS_HELP_STRING([--with-mpc=PATH],
1496                 [specify prefix directory for installed MPC package.
1497                  Equivalent to --with-mpc-include=PATH/include
1498                  plus --with-mpc-lib=PATH/lib])])
1499 AC_ARG_WITH(mpc-include,
1500 [AS_HELP_STRING([--with-mpc-include=PATH],
1501                 [specify directory for installed MPC include files])])
1502 AC_ARG_WITH(mpc-lib,
1503 [AS_HELP_STRING([--with-mpc-lib=PATH],
1504                 [specify directory for the installed MPC library])])
1505
1506 if test "x$with_mpc" != x; then
1507   gmplibs="-L$with_mpc/lib $gmplibs"
1508   gmpinc="-I$with_mpc/include $gmpinc"
1509 fi
1510 if test "x$with_mpc_include" != x; then
1511   gmpinc="-I$with_mpc_include $gmpinc"
1512 fi
1513 if test "x$with_mpc_lib" != x; then
1514   gmplibs="-L$with_mpc_lib $gmplibs"
1515 fi
1516 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1517   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1518   gmpinc='-I$$s/mpc/src '"$gmpinc"
1519   # Do not test the mpc version.  Assume that it is sufficient, since
1520   # it is in the source tree, and the library has not been built yet
1521   # but it would be included on the link line in the version check below
1522   # hence making the test fail.
1523   have_gmp=yes
1524 fi
1525
1526 # Specify a location for mpfr
1527 # check for this first so it ends up on the link line before gmp.
1528 AC_ARG_WITH(mpfr-dir,
1529 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1530 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1531 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1532
1533 AC_ARG_WITH(mpfr,
1534 [AS_HELP_STRING([--with-mpfr=PATH],
1535                 [specify prefix directory for installed MPFR package.
1536                  Equivalent to --with-mpfr-include=PATH/include
1537                  plus --with-mpfr-lib=PATH/lib])])
1538 AC_ARG_WITH(mpfr-include,
1539 [AS_HELP_STRING([--with-mpfr-include=PATH],
1540                 [specify directory for installed MPFR include files])])
1541 AC_ARG_WITH(mpfr-lib,
1542 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1543                 [specify directory for the installed MPFR library])])
1544
1545 if test "x$with_mpfr" != x; then
1546   gmplibs="-L$with_mpfr/lib $gmplibs"
1547   gmpinc="-I$with_mpfr/include $gmpinc"
1548 fi
1549 if test "x$with_mpfr_include" != x; then
1550   gmpinc="-I$with_mpfr_include $gmpinc"
1551 fi
1552 if test "x$with_mpfr_lib" != x; then
1553   gmplibs="-L$with_mpfr_lib $gmplibs"
1554 fi
1555 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1556   # MPFR v3.1.0 moved the sources into a src sub-directory.
1557   if test -d ${srcdir}/mpfr/src; then
1558     gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1559     gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1560     extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1561   else
1562     gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir $gmplibs"
1563     gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr -I$$s/mpfr '"$gmpinc"
1564     extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir"
1565   fi
1566   # Do not test the mpfr version.  Assume that it is sufficient, since
1567   # it is in the source tree, and the library has not been built yet
1568   # but it would be included on the link line in the version check below
1569   # hence making the test fail.
1570   have_gmp=yes
1571 fi
1572
1573 # Specify a location for gmp
1574 AC_ARG_WITH(gmp-dir,
1575 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1576 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1577 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1578
1579 AC_ARG_WITH(gmp,
1580 [AS_HELP_STRING([--with-gmp=PATH],
1581                 [specify prefix directory for the installed GMP package.
1582                  Equivalent to --with-gmp-include=PATH/include
1583                  plus --with-gmp-lib=PATH/lib])])
1584 AC_ARG_WITH(gmp-include,
1585 [AS_HELP_STRING([--with-gmp-include=PATH],
1586                 [specify directory for installed GMP include files])])
1587 AC_ARG_WITH(gmp-lib,
1588 [AS_HELP_STRING([--with-gmp-lib=PATH],
1589                 [specify directory for the installed GMP library])])
1590
1591
1592 if test "x$with_gmp" != x; then
1593   gmplibs="-L$with_gmp/lib $gmplibs"
1594   gmpinc="-I$with_gmp/include $gmpinc"
1595 fi
1596 if test "x$with_gmp_include" != x; then
1597   gmpinc="-I$with_gmp_include $gmpinc"
1598 fi
1599 if test "x$with_gmp_lib" != x; then
1600   gmplibs="-L$with_gmp_lib $gmplibs"
1601 fi
1602 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1603   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1604   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1605   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1606   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1607   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1608   # Do not test the gmp version.  Assume that it is sufficient, since
1609   # it is in the source tree, and the library has not been built yet
1610   # but it would be included on the link line in the version check below
1611   # hence making the test fail.
1612   have_gmp=yes
1613 fi
1614
1615 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1616   have_gmp=yes
1617   saved_CFLAGS="$CFLAGS"
1618   CFLAGS="$CFLAGS $gmpinc"
1619   # Check for the recommended and required versions of GMP.
1620   AC_MSG_CHECKING([for the correct version of gmp.h])
1621   AC_TRY_COMPILE([#include "gmp.h"],[
1622   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1623   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1624   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1625   choke me
1626   #endif
1627   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1628   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1629   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1630   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1631   choke me
1632   #endif
1633   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1634    [AC_MSG_RESULT([no]); have_gmp=no])
1635
1636   # If we have GMP, check the MPFR version.
1637   if test x"$have_gmp" = xyes; then
1638     # Check for the recommended and required versions of MPFR.
1639     AC_MSG_CHECKING([for the correct version of mpfr.h])
1640     AC_TRY_COMPILE([#include <gmp.h>
1641     #include <mpfr.h>],[
1642     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,0)
1643     choke me
1644     #endif
1645     ], [AC_TRY_COMPILE([#include <gmp.h>
1646     #include <mpfr.h>],[
1647     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,2)
1648     choke me
1649     #endif
1650     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1651      [AC_MSG_RESULT([no]); have_gmp=no])
1652   fi
1653
1654   # Check for the MPC header version.
1655   if test x"$have_gmp" = xyes ; then
1656     # Check for the recommended and required versions of MPC.
1657     AC_MSG_CHECKING([for the correct version of mpc.h])
1658     AC_TRY_COMPILE([#include <mpc.h>],[
1659     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1660     choke me
1661     #endif
1662     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1663     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1664     choke me
1665     #endif
1666     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1667      [AC_MSG_RESULT([no]); have_gmp=no])
1668   fi
1669
1670   # Now check the MPFR library.
1671   if test x"$have_gmp" = xyes; then
1672     saved_LIBS="$LIBS"
1673     LIBS="$LIBS $gmplibs"
1674     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1675     AC_TRY_LINK([#include <mpc.h>],[
1676     mpfr_t n;
1677     mpfr_t x;
1678     mpc_t c;
1679     int t;
1680     mpfr_init (n);
1681     mpfr_init (x);
1682     mpfr_atan2 (n, n, x, GMP_RNDN);
1683     mpfr_erfc (n, x, GMP_RNDN);
1684     mpfr_subnormalize (x, t, GMP_RNDN);
1685     mpfr_clear(n);
1686     mpfr_clear(x);
1687     mpc_init2 (c, 53);
1688     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1689     mpc_cosh (c, c, MPC_RNDNN);
1690     mpc_pow (c, c, c, MPC_RNDNN);
1691     mpc_acosh (c, c, MPC_RNDNN);
1692     mpc_clear (c);
1693     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1694     LIBS="$saved_LIBS"
1695   fi
1696
1697   CFLAGS="$saved_CFLAGS"
1698
1699 # The library versions listed in the error message below should match
1700 # the HARD-minimums enforced above.
1701   if test x$have_gmp != xyes; then
1702     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
1703 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1704 their locations.  Source code for these libraries can be found at
1705 their respective hosting sites as well as at
1706 ftp://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1707 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1708 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1709 make sure that you have installed both the libraries and the header
1710 files.  They may be located in separate packages.])
1711   fi
1712 fi
1713
1714 # Flags needed for both GMP, MPFR and/or MPC.
1715 AC_SUBST(gmplibs)
1716 AC_SUBST(gmpinc)
1717 AC_SUBST(extra_mpfr_configure_flags)
1718 AC_SUBST(extra_mpc_gmp_configure_flags)
1719 AC_SUBST(extra_mpc_mpfr_configure_flags)
1720 AC_SUBST(extra_isl_gmp_configure_flags)
1721
1722 # Libraries to use for stage1 or when not bootstrapping.
1723 AC_ARG_WITH(stage1-libs,
1724 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1725 [if test "$withval" = "no" -o "$withval" = "yes"; then
1726    stage1_libs=
1727  else
1728    stage1_libs=$withval
1729  fi],
1730 [stage1_libs=])
1731 AC_SUBST(stage1_libs)
1732
1733 # Linker flags to use for stage1 or when not bootstrapping.
1734 AC_ARG_WITH(stage1-ldflags,
1735 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1736 [if test "$withval" = "no" -o "$withval" = "yes"; then
1737    stage1_ldflags=
1738  else
1739    stage1_ldflags=$withval
1740  fi],
1741 [stage1_ldflags=
1742  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1743  # if supported.  But if the user explicitly specified the libraries to use,
1744  # trust that they are doing what they want.
1745  if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
1746    stage1_ldflags="-static-libstdc++ -static-libgcc"
1747  fi])
1748 AC_SUBST(stage1_ldflags)
1749
1750 # Libraries to use for stage2 and later builds.
1751 AC_ARG_WITH(boot-libs,
1752 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1753 [if test "$withval" = "no" -o "$withval" = "yes"; then
1754    poststage1_libs=
1755  else
1756    poststage1_libs=$withval
1757  fi],
1758 [poststage1_libs=])
1759 AC_SUBST(poststage1_libs)
1760
1761 # Linker flags to use for stage2 and later builds.
1762 AC_ARG_WITH(boot-ldflags,
1763 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1764                 [linker flags for stage2 and later])],
1765 [if test "$withval" = "no" -o "$withval" = "yes"; then
1766    poststage1_ldflags=
1767  else
1768    poststage1_ldflags=$withval
1769  fi],
1770 [poststage1_ldflags=
1771  # In stages 2 and 3, default to linking libstdc++ and libgcc
1772  # statically.  But if the user explicitly specified the libraries to
1773  # use, trust that they are doing what they want.
1774  if test "$poststage1_libs" = ""; then
1775    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1776  fi])
1777 AC_SUBST(poststage1_ldflags)
1778
1779 # GCC GRAPHITE dependency isl.
1780 # Basic setup is inlined here, actual checks are in config/isl.m4
1781
1782 AC_ARG_WITH(isl,
1783   [AS_HELP_STRING(
1784    [--with-isl=PATH],
1785    [Specify prefix directory for the installed isl package.
1786     Equivalent to --with-isl-include=PATH/include
1787     plus --with-isl-lib=PATH/lib])])
1788
1789 # Treat --without-isl as a request to disable
1790 # GRAPHITE support and skip all following checks.
1791 if test "x$with_isl" != "xno"; then
1792   # Check for isl
1793   dnl Provide configure switches and initialize islinc & isllibs
1794   dnl with user input.
1795   ISL_INIT_FLAGS
1796   dnl The versions of isl that work for Graphite
1797   ISL_CHECK_VERSION()
1798   dnl Only execute fail-action, if isl has been requested.
1799   ISL_IF_FAILED([
1800     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1801 fi
1802
1803 # If the isl check failed, disable builds of in-tree variant of isl
1804 if test "x$with_isl" = xno ||
1805    test "x$gcc_cv_isl" = xno; then
1806   noconfigdirs="$noconfigdirs isl"
1807   islinc=
1808 fi
1809
1810 AC_SUBST(isllibs)
1811 AC_SUBST(islinc)
1812
1813 # Check for LTO support.
1814 AC_ARG_ENABLE(lto,
1815 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1816 enable_lto=$enableval,
1817 enable_lto=yes; default_enable_lto=yes)
1818
1819 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1820   build_lto_plugin=yes
1821 ],[if test x"$default_enable_lto" = x"yes" ; then
1822     case $target in
1823       *-apple-darwin9* | *-cygwin* | *-mingw* | *djgpp*) ;;
1824       # On other non-ELF platforms, LTO has yet to be validated.
1825       *) enable_lto=no ;;
1826     esac
1827   else
1828   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1829   # It would also be nice to check the binutils support, but we don't
1830   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1831   # warn during gcc/ subconfigure; unless you're bootstrapping with
1832   # -flto it won't be needed until after installation anyway.
1833     case $target in
1834       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1835       *) if test x"$enable_lto" = x"yes"; then
1836         AC_MSG_ERROR([LTO support is not enabled for this target.])
1837         fi
1838       ;;
1839     esac
1840   fi
1841   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1842   # Build it unless LTO was explicitly disabled.
1843   case $target in
1844     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1845     *) ;;
1846   esac
1847 ])
1848
1849 AC_ARG_ENABLE(linker-plugin-configure-flags,
1850   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1851     [additional flags for configuring linker plugins @<:@none@:>@])],
1852   extra_linker_plugin_configure_flags=$enableval,
1853   extra_linker_plugin_configure_flags=)
1854 AC_SUBST(extra_linker_plugin_configure_flags)
1855 AC_ARG_ENABLE(linker-plugin-flags,
1856   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1857     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1858   extra_linker_plugin_flags=$enableval,
1859   extra_linker_plugin_flags=)
1860 AC_SUBST(extra_linker_plugin_flags)
1861
1862
1863 # By default, C and C++ are the only stage 1 languages.
1864 stage1_languages=,c,
1865
1866 # Target libraries that we bootstrap.
1867 bootstrap_target_libs=,target-libgcc,
1868
1869 # Figure out what language subdirectories are present.
1870 # Look if the user specified --enable-languages="..."; if not, use
1871 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1872 # go away some day.
1873 # NB:  embedded tabs in this IF block -- do not untabify
1874 if test -d ${srcdir}/gcc; then
1875   if test x"${enable_languages+set}" != xset; then
1876     if test x"${LANGUAGES+set}" = xset; then
1877       enable_languages="${LANGUAGES}"
1878         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1879     else
1880       enable_languages=all
1881     fi
1882   else
1883     if test x"${enable_languages}" = x ||
1884        test x"${enable_languages}" = xyes;
1885        then
1886       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1887       exit 1
1888     fi
1889   fi
1890   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1891
1892   # 'f95' is the old name for the 'fortran' language. We issue a warning
1893   # and make the substitution.
1894   case ,${enable_languages}, in
1895     *,f95,*)
1896       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1897       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1898       ;;
1899   esac
1900
1901   # If bootstrapping, C++ must be enabled.
1902   case ",$enable_languages,:$enable_bootstrap" in
1903     *,c++,*:*) ;;
1904     *:yes)
1905       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1906         enable_languages="${enable_languages},c++"
1907       else
1908         AC_MSG_ERROR([bootstrapping requires c++ sources])
1909       fi
1910       ;;
1911   esac
1912
1913   # First scan to see if an enabled language requires some other language.
1914   # We assume that a given config-lang.in will list all the language
1915   # front ends it requires, even if some are required indirectly.
1916   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1917     case ${lang_frag} in
1918       ..) ;;
1919       # The odd quoting in the next line works around
1920       # an apparent bug in bash 1.12 on linux.
1921       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1922       *)
1923         # From the config-lang.in, get $language, $lang_requires, and
1924         # $lang_requires_boot_languages.
1925         language=
1926         lang_requires=
1927         lang_requires_boot_languages=
1928         . ${lang_frag}
1929         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1930           case ,${enable_languages}, in
1931             *,$other,*) ;;
1932             *,all,*) ;;
1933             *,$language,*)
1934               echo " \`$other' language required by \`$language'; enabling" 1>&2
1935               enable_languages="${enable_languages},${other}"
1936               ;;
1937           esac
1938         done
1939         for other in ${lang_requires_boot_languages} ; do
1940           if test "$other" != "c"; then
1941             case ,${enable_stage1_languages}, in
1942               *,$other,*) ;;
1943               *,all,*) ;;
1944               *)
1945                 case ,${enable_languages}, in
1946                   *,$language,*)
1947                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1948                     enable_stage1_languages="$enable_stage1_languages,${other}"
1949                     ;;
1950                 esac
1951                 ;;
1952             esac
1953           fi
1954         done
1955         ;;
1956     esac
1957   done
1958
1959   new_enable_languages=,c,
1960
1961   # If LTO is enabled, add the LTO front end.
1962   if test "$enable_lto" = "yes" ; then
1963     case ,${enable_languages}, in
1964       *,lto,*) ;;
1965       *) enable_languages="${enable_languages},lto" ;;
1966     esac
1967     if test "${build_lto_plugin}" = "yes" ; then
1968       configdirs="$configdirs lto-plugin"
1969     fi
1970   fi
1971
1972   # If we're building an offloading compiler, add the LTO front end.
1973   if test x"$enable_as_accelerator_for" != x ; then
1974     case ,${enable_languages}, in
1975       *,lto,*) ;;
1976       *) enable_languages="${enable_languages},lto" ;;
1977     esac
1978   fi
1979
1980   missing_languages=`echo ",$enable_languages," | sed -e s/,all,/,/ -e s/,c,/,/ `
1981   potential_languages=,c,
1982
1983   enabled_target_libs=
1984   disabled_target_libs=
1985
1986   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1987     case ${lang_frag} in
1988       ..) ;;
1989       # The odd quoting in the next line works around
1990       # an apparent bug in bash 1.12 on linux.
1991       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1992       *)
1993         # From the config-lang.in, get $language, $target_libs,
1994         # $lang_dirs, $boot_language, and $build_by_default
1995         language=
1996         target_libs=
1997         lang_dirs=
1998         subdir_requires=
1999         boot_language=no
2000         build_by_default=yes
2001         . ${lang_frag}
2002         if test x${language} = x; then
2003           echo "${lang_frag} doesn't set \$language." 1>&2
2004           exit 1
2005         fi
2006
2007         if test "$language" = "c++"; then
2008           boot_language=yes
2009         fi
2010
2011         add_this_lang=no
2012         case ,${enable_languages}, in
2013           *,${language},*)
2014             # Language was explicitly selected; include it
2015             # unless it is C, which is enabled by default.
2016             if test "$language" != "c"; then
2017               add_this_lang=yes
2018             fi
2019             ;;
2020           *,all,*)
2021             # 'all' was selected, select it if it is a default language
2022             if test "$language" != "c"; then
2023               add_this_lang=${build_by_default}
2024             fi
2025             ;;
2026         esac
2027
2028         # Disable languages that need other directories if these aren't available.
2029         for i in $subdir_requires; do
2030           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2031           case ,${enable_languages}, in
2032             *,${language},*)
2033               # Specifically requested language; tell them.
2034               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2035               ;;
2036             *)
2037               # Silently disable.
2038               add_this_lang=unsupported
2039               ;;
2040           esac
2041         done
2042
2043         # Disable Ada if no preexisting GNAT is available.
2044         case ,${enable_languages},:${language}:${have_gnat} in
2045           *,${language},*:ada:no)
2046             # Specifically requested language; tell them.
2047             AC_MSG_ERROR([GNAT is required to build $language])
2048             ;;
2049           *:ada:no)
2050             # Silently disable.
2051             add_this_lang=unsupported
2052             ;;
2053         esac
2054
2055         # Disable a language that is unsupported by the target.
2056         case " $unsupported_languages " in
2057           *" $language "*)
2058             add_this_lang=unsupported
2059             ;;
2060         esac
2061
2062         case $add_this_lang in
2063           unsupported)
2064             # Remove language-dependent dirs.
2065             disabled_target_libs="$disabled_target_libs $target_libs"
2066             noconfigdirs="$noconfigdirs $lang_dirs"
2067             ;;
2068           no)
2069             # Remove language-dependent dirs; still show language as supported.
2070             disabled_target_libs="$disabled_target_libs $target_libs"
2071             noconfigdirs="$noconfigdirs $lang_dirs"
2072             potential_languages="${potential_languages}${language},"
2073             ;;
2074           yes)
2075             new_enable_languages="${new_enable_languages}${language},"
2076             potential_languages="${potential_languages}${language},"
2077             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2078             enabled_target_libs="$enabled_target_libs $target_libs"
2079             case "${boot_language}:,$enable_stage1_languages," in
2080               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2081                 # Add to (comma-separated) list of stage 1 languages.
2082                 case ",$stage1_languages," in
2083                   *,$language,* | ,yes, | ,all,) ;;
2084                   *) stage1_languages="${stage1_languages}${language}," ;;
2085                 esac
2086                 # We need to bootstrap any supporting libraries.
2087                 bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
2088                 ;;
2089             esac
2090             ;;
2091         esac
2092         ;;
2093     esac
2094   done
2095
2096   # Add target libraries which are only needed for disabled languages
2097   # to noconfigdirs.
2098   if test -n "$disabled_target_libs"; then
2099     for dir in $disabled_target_libs; do
2100       case " $enabled_target_libs " in
2101       *" ${dir} "*) ;;
2102       *) noconfigdirs="$noconfigdirs $dir" ;;
2103       esac
2104     done
2105   fi
2106
2107   AC_ARG_ENABLE(stage1-languages,
2108   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2109                   [choose additional languages to build during
2110                   stage1.  Mostly useful for compiler development])],
2111   [case ,${enable_stage1_languages}, in
2112     ,no,|,,)
2113       # Set it to something that will have no effect in the loop below
2114       enable_stage1_languages=c ;;
2115     ,yes,)
2116       enable_stage1_languages=`echo $new_enable_languages | \
2117         sed -e "s/^,//" -e "s/,$//" ` ;;
2118     *,all,*)
2119       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2120         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2121   esac
2122
2123   # Add "good" languages from enable_stage1_languages to stage1_languages,
2124   # while "bad" languages go in missing_languages.  Leave no duplicates.
2125   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2126     case $potential_languages in
2127       *,$i,*)
2128         case $stage1_languages in
2129           *,$i,*) ;;
2130           *) stage1_languages="$stage1_languages$i," ;;
2131         esac ;;
2132       *)
2133         case $missing_languages in
2134           *,$i,*) ;;
2135           *) missing_languages="$missing_languages$i," ;;
2136         esac ;;
2137      esac
2138   done])
2139
2140   # Remove leading/trailing commas that were added for simplicity
2141   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2142   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2143   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2144   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2145
2146   if test "x$missing_languages" != x; then
2147     AC_MSG_ERROR([
2148 The following requested languages could not be built: ${missing_languages}
2149 Supported languages are: ${potential_languages}])
2150   fi
2151   if test "x$new_enable_languages" != "x$enable_languages"; then
2152     echo The following languages will be built: ${new_enable_languages}
2153     enable_languages="$new_enable_languages"
2154   fi
2155
2156   AC_SUBST(stage1_languages)
2157   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2158 fi
2159
2160 # Handle --disable-<component> generically.
2161 for dir in $configdirs $build_configdirs $target_configdirs ; do
2162   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2163   varname=`echo $dirname | sed -e s/+/_/g`
2164   if eval test x\${enable_${varname}} "=" xno ; then
2165     noconfigdirs="$noconfigdirs $dir"
2166   fi
2167 done
2168
2169 # Check for Boehm's garbage collector
2170 AC_ARG_ENABLE(objc-gc,
2171 [AS_HELP_STRING([--enable-objc-gc],
2172                 [enable use of Boehm's garbage collector with the
2173                  GNU Objective-C runtime])],
2174 [case ,${enable_languages},:${enable_objc_gc}:${noconfigdirs} in
2175   *,objc,*:*:yes:*target-boehm-gc*)
2176     AC_MSG_ERROR([Boehm's garbage collector was requested yet not supported in this configuration])
2177     ;;
2178 esac])
2179
2180 # Make sure we only build Boehm's garbage collector if required.
2181 case ,${enable_languages},:${enable_objc_gc} in
2182   *,objc,*:yes)
2183     # Keep target-boehm-gc if requested for Objective-C.
2184     ;;
2185   *)
2186     # Otherwise remove target-boehm-gc depending on target-libjava.
2187     if echo " ${noconfigdirs} " | grep "target-libjava" >/dev/null 2>&1; then
2188       noconfigdirs="$noconfigdirs target-boehm-gc"
2189     fi
2190     ;;
2191 esac
2192
2193 # Disable libcilkrts, libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2194 case ,${enable_languages}, in
2195   *,c++,*)
2196     # Disable libcilkrts, libitm, libsanitizer if we're not building libstdc++
2197     case "${noconfigdirs}" in
2198       *target-libstdc++-v3*)
2199         noconfigdirs="$noconfigdirs target-libcilkrts target-libitm target-libsanitizer"
2200         ;;
2201       *) ;;
2202     esac
2203     ;;
2204   *)
2205     noconfigdirs="$noconfigdirs target-libcilkrts target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2206     ;;
2207 esac
2208
2209 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2210 # $build_configdirs and $target_configdirs.
2211 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2212
2213 notsupp=""
2214 for dir in . $skipdirs $noconfigdirs ; do
2215   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2216   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2217     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2218     if test -r $srcdir/$dirname/configure ; then
2219       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2220         true
2221       else
2222         notsupp="$notsupp $dir"
2223       fi
2224     fi
2225   fi
2226   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2227     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2228     if test -r $srcdir/$dirname/configure ; then
2229       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2230         true
2231       else
2232         notsupp="$notsupp $dir"
2233       fi
2234     fi
2235   fi
2236   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2237     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2238     if test -r $srcdir/$dirname/configure ; then
2239       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2240         true
2241       else
2242         notsupp="$notsupp $dir"
2243       fi
2244     fi
2245   fi
2246 done
2247
2248 # Quietly strip out all directories which aren't configurable in this tree.
2249 # This relies on all configurable subdirectories being autoconfiscated, which
2250 # is now the case.
2251 build_configdirs_all="$build_configdirs"
2252 build_configdirs=
2253 for i in ${build_configdirs_all} ; do
2254   j=`echo $i | sed -e s/build-//g`
2255   if test -f ${srcdir}/$j/configure ; then
2256     build_configdirs="${build_configdirs} $i"
2257   fi
2258 done
2259
2260 configdirs_all="$configdirs"
2261 configdirs=
2262 for i in ${configdirs_all} ; do
2263   if test -f ${srcdir}/$i/configure ; then
2264     configdirs="${configdirs} $i"
2265   fi
2266 done
2267
2268 target_configdirs_all="$target_configdirs"
2269 target_configdirs=
2270 for i in ${target_configdirs_all} ; do
2271   j=`echo $i | sed -e s/target-//g`
2272   if test -f ${srcdir}/$j/configure ; then
2273     target_configdirs="${target_configdirs} $i"
2274   fi
2275 done
2276
2277 # Exclude target-zlib if target-libjava isn't built.
2278 case ${target_configdirs} in
2279 *target-libjava*)
2280   ;;
2281 *)
2282   target_configdirs="`echo ${target_configdirs} | sed -e 's/target-zlib//'`"
2283   ;;
2284 esac
2285
2286 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2287 # so we have to add it after the preceding checks.
2288 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2289 then
2290   case " $configdirs " in
2291     *" libiberty "*)
2292       # If we can build libiberty, we can also build libiberty-linker-plugin.
2293       configdirs="$configdirs libiberty-linker-plugin"
2294       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2295         --with-libiberty=../libiberty-linker-plugin";;
2296     *)
2297       AC_MSG_ERROR([libiberty missing]);;
2298   esac
2299 fi
2300
2301 # Sometimes we have special requirements for the host libiberty.
2302 extra_host_libiberty_configure_flags=
2303 extra_host_zlib_configure_flags=
2304 case " $configdirs " in
2305   *" lto-plugin "* | *" libcc1 "*)
2306     # When these are to be built as shared libraries, the same applies to
2307     # libiberty.
2308     extra_host_libiberty_configure_flags=--enable-shared
2309     ;;
2310   *" bfd "*)
2311     # When bfd is to be built as a shared library, the same applies to
2312     # zlib.
2313     if test "$enable_shared" = "yes"; then
2314       extra_host_zlib_configure_flags=--enable-host-shared
2315     fi
2316     ;;
2317 esac
2318 AC_SUBST(extra_host_libiberty_configure_flags)
2319 AC_SUBST(extra_host_zlib_configure_flags)
2320
2321 # Produce a warning message for the subdirs we can't configure.
2322 # This isn't especially interesting in the Cygnus tree, but in the individual
2323 # FSF releases, it's important to let people know when their machine isn't
2324 # supported by the one or two programs in a package.
2325
2326 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2327   # If $appdirs is non-empty, at least one of those directories must still
2328   # be configured, or we error out.  (E.g., if the gas release supports a
2329   # specified target in some subdirs but not the gas subdir, we shouldn't
2330   # pretend that all is well.)
2331   if test -n "$appdirs" ; then
2332     for dir in $appdirs ; do
2333       if test -r $dir/Makefile.in ; then
2334         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2335           appdirs=""
2336           break
2337         fi
2338         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2339           appdirs=""
2340           break
2341         fi
2342       fi
2343     done
2344     if test -n "$appdirs" ; then
2345       echo "*** This configuration is not supported by this package." 1>&2
2346       exit 1
2347     fi
2348   fi
2349   # Okay, some application will build, or we don't care to check.  Still
2350   # notify of subdirs not getting built.
2351   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2352   echo "    ${notsupp}" 1>&2
2353   echo "    (Any other directories should still work fine.)" 1>&2
2354 fi
2355
2356 case "$host" in
2357   *msdosdjgpp*)
2358     enable_gdbtk=no ;;
2359 esac
2360
2361 # To find our prefix, in gcc_cv_tool_prefix.
2362 ACX_TOOL_DIRS
2363
2364 copy_dirs=
2365
2366 AC_ARG_WITH([build-sysroot],
2367   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2368                   [use sysroot as the system root during the build])],
2369   [if test x"$withval" != x ; then
2370      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2371    fi],
2372   [SYSROOT_CFLAGS_FOR_TARGET=])
2373 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2374
2375 AC_ARG_WITH([debug-prefix-map],
2376   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2377                   [map A to B, C to D ... in debug information])],
2378   [if test x"$withval" != x; then
2379      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2380      for debug_map in $withval; do
2381        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2382      done
2383    fi],
2384   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2385 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2386
2387 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2388 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2389 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2390 # We want to ensure that TARGET libraries (which we know are built with
2391 # gcc) are built with "-O2 -g", so include those options when setting
2392 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2393 if test "x$CFLAGS_FOR_TARGET" = x; then
2394   if test "x${is_cross_compiler}" = xyes; then
2395     CFLAGS_FOR_TARGET="-g -O2"
2396   else
2397     CFLAGS_FOR_TARGET=$CFLAGS
2398     case " $CFLAGS " in
2399       *" -O2 "*) ;;
2400       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2401     esac
2402     case " $CFLAGS " in
2403       *" -g "* | *" -g3 "*) ;;
2404       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2405     esac
2406   fi
2407 fi
2408 AC_SUBST(CFLAGS_FOR_TARGET)
2409
2410 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2411   if test "x${is_cross_compiler}" = xyes; then
2412     CXXFLAGS_FOR_TARGET="-g -O2"
2413   else
2414     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2415     case " $CXXFLAGS " in
2416       *" -O2 "*) ;;
2417       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2418     esac
2419     case " $CXXFLAGS " in
2420       *" -g "* | *" -g3 "*) ;;
2421       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2422     esac
2423   fi
2424 fi
2425 AC_SUBST(CXXFLAGS_FOR_TARGET)
2426
2427 AC_SUBST(LDFLAGS_FOR_TARGET)
2428
2429 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2430 # the named directory are copied to $(tooldir)/sys-include.
2431 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2432   if test x${is_cross_compiler} = xno ; then
2433     echo 1>&2 '***' --with-headers is only supported when cross compiling
2434     exit 1
2435   fi
2436   if test x"${with_headers}" != xyes ; then
2437     x=${gcc_cv_tool_prefix}
2438     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2439   fi
2440 fi
2441
2442 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2443 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2444 # are permitted.
2445 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2446   if test x${is_cross_compiler} = xno ; then
2447     echo 1>&2 '***' --with-libs is only supported when cross compiling
2448     exit 1
2449   fi
2450   if test x"${with_libs}" != xyes ; then
2451     # Copy the libraries in reverse order, so that files in the first named
2452     # library override files in subsequent libraries.
2453     x=${gcc_cv_tool_prefix}
2454     for l in ${with_libs}; do
2455       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2456     done
2457   fi
2458 fi
2459
2460 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2461 #
2462 # This is done by determining whether or not the appropriate directory
2463 # is available, and by checking whether or not specific configurations
2464 # have requested that this magic not happen.
2465 #
2466 # The command line options always override the explicit settings in
2467 # configure.ac, and the settings in configure.ac override this magic.
2468 #
2469 # If the default for a toolchain is to use GNU as and ld, and you don't
2470 # want to do that, then you should use the --without-gnu-as and
2471 # --without-gnu-ld options for the configure script.  Similarly, if
2472 # the default is to use the included zlib and you don't want to do that,
2473 # you should use the --with-system-zlib option for the configure script.
2474
2475 if test x${use_gnu_as} = x &&
2476    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2477   with_gnu_as=yes
2478   extra_host_args="$extra_host_args --with-gnu-as"
2479 fi
2480
2481 if test x${use_gnu_ld} = x &&
2482    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2483   with_gnu_ld=yes
2484   extra_host_args="$extra_host_args --with-gnu-ld"
2485 fi
2486
2487 if test x${use_included_zlib} = x &&
2488    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2489   :
2490 else
2491   with_system_zlib=yes
2492   extra_host_args="$extra_host_args --with-system-zlib"
2493 fi
2494
2495 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2496 # can detect this case.
2497
2498 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2499   with_newlib=yes
2500   extra_host_args="$extra_host_args --with-newlib"
2501 fi
2502
2503 # Handle ${copy_dirs}
2504 set fnord ${copy_dirs}
2505 shift
2506 while test $# != 0 ; do
2507   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2508     :
2509   else
2510     echo Copying $1 to $2
2511
2512     # Use the install script to create the directory and all required
2513     # parent directories.
2514     if test -d $2 ; then
2515       :
2516     else
2517       echo >config.temp
2518       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2519     fi
2520
2521     # Copy the directory, assuming we have tar.
2522     # FIXME: Should we use B in the second tar?  Not all systems support it.
2523     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2524
2525     # It is the responsibility of the user to correctly adjust all
2526     # symlinks.  If somebody can figure out how to handle them correctly
2527     # here, feel free to add the code.
2528
2529     echo $1 > $2/COPIED
2530   fi
2531   shift; shift
2532 done
2533
2534 # Determine a target-dependent exec_prefix that the installed
2535 # gcc will search in.  Keep this list sorted by triplet, with
2536 # the *-*-osname triplets last.
2537 md_exec_prefix=
2538 case "${target}" in
2539   i[[34567]]86-pc-msdosdjgpp*)
2540     md_exec_prefix=/dev/env/DJDIR/bin
2541     ;;
2542   *-*-hpux* | \
2543   *-*-nto-qnx* | \
2544   *-*-solaris2*)
2545     md_exec_prefix=/usr/ccs/bin
2546     ;;
2547 esac
2548
2549 extra_arflags_for_target=
2550 extra_nmflags_for_target=
2551 extra_ranlibflags_for_target=
2552 target_makefile_frag=/dev/null
2553 case "${target}" in
2554   spu-*-*)
2555     target_makefile_frag="config/mt-spu"
2556     ;;
2557   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2558     target_makefile_frag="config/mt-sde"
2559     ;;
2560   mipsisa*-*-elfoabi*)
2561     target_makefile_frag="config/mt-mips-elfoabi"
2562     ;;
2563   mips*-*-*linux* | mips*-*-gnu*)
2564     target_makefile_frag="config/mt-mips-gnu"
2565     ;;
2566   nios2-*-elf*)
2567     target_makefile_frag="config/mt-nios2-elf"
2568     ;;
2569   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2570     target_makefile_frag="config/mt-gnu"
2571     ;;
2572   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2573     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2574     # commands to handle both 32-bit and 64-bit objects.  These flags are
2575     # harmless if we're using GNU nm or ar.
2576     extra_arflags_for_target=" -X32_64"
2577     extra_nmflags_for_target=" -B -X32_64"
2578     ;;
2579 esac
2580
2581 alphaieee_frag=/dev/null
2582 case $target in
2583   alpha*-*-*)
2584     # This just makes sure to use the -mieee option to build target libs.
2585     # This should probably be set individually by each library.
2586     alphaieee_frag="config/mt-alphaieee"
2587     ;;
2588 esac
2589
2590 # If --enable-target-optspace always use -Os instead of -O2 to build
2591 # the target libraries, similarly if it is not specified, use -Os
2592 # on selected platforms.
2593 ospace_frag=/dev/null
2594 case "${enable_target_optspace}:${target}" in
2595   yes:*)
2596     ospace_frag="config/mt-ospace"
2597     ;;
2598   :d30v-*)
2599     ospace_frag="config/mt-d30v"
2600     ;;
2601   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2602     ospace_frag="config/mt-ospace"
2603     ;;
2604   no:* | :*)
2605     ;;
2606   *)
2607     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2608     ;;
2609 esac
2610
2611 # Some systems (e.g., one of the i386-aix systems the gas testers are
2612 # using) don't handle "\$" correctly, so don't use it here.
2613 tooldir='${exec_prefix}'/${target_noncanonical}
2614 build_tooldir=${tooldir}
2615
2616 # Create a .gdbinit file which runs the one in srcdir
2617 # and tells GDB to look there for source files.
2618
2619 if test -r ${srcdir}/.gdbinit ; then
2620   case ${srcdir} in
2621     .) ;;
2622     *) cat > ./.gdbinit <<EOF
2623 # ${NO_EDIT}
2624 dir ${srcdir}
2625 dir .
2626 source ${srcdir}/.gdbinit
2627 EOF
2628     ;;
2629   esac
2630 fi
2631
2632 # Make sure that the compiler is able to generate an executable.  If it
2633 # can't, we are probably in trouble.  We don't care whether we can run the
2634 # executable--we might be using a cross compiler--we only care whether it
2635 # can be created.  At this point the main configure script has set CC.
2636 we_are_ok=no
2637 echo "int main () { return 0; }" > conftest.c
2638 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2639 if test $? = 0 ; then
2640   if test -s conftest || test -s conftest.exe ; then
2641     we_are_ok=yes
2642   fi
2643 fi
2644 case $we_are_ok in
2645   no)
2646     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2647     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2648     rm -f conftest*
2649     exit 1
2650     ;;
2651 esac
2652 rm -f conftest*
2653
2654 # Decide which environment variable is used to find dynamic libraries.
2655 case "${host}" in
2656   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2657   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2658   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2659   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2660 esac
2661
2662 # On systems where the dynamic library environment variable is PATH,
2663 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2664 # built executables to PATH.
2665 if test "$RPATH_ENVVAR" = PATH; then
2666   GCC_SHLIB_SUBDIR=/shlib
2667 else
2668   GCC_SHLIB_SUBDIR=
2669 fi
2670
2671 # Adjust the toplevel makefile according to whether bootstrap was selected.
2672 case $enable_bootstrap in
2673   yes)
2674     bootstrap_suffix=bootstrap
2675     BUILD_CONFIG=bootstrap-debug
2676     ;;
2677   no)
2678     bootstrap_suffix=no-bootstrap
2679     BUILD_CONFIG=
2680     ;;
2681 esac
2682
2683 AC_MSG_CHECKING(for default BUILD_CONFIG)
2684
2685 AC_ARG_WITH([build-config],
2686   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2687                   [use config/NAME.mk build configuration])],
2688   [case $with_build_config in
2689    yes) with_build_config= ;;
2690    no) with_build_config= BUILD_CONFIG= ;;
2691    esac])
2692
2693 if test "x${with_build_config}" != x; then
2694   BUILD_CONFIG=$with_build_config
2695 else
2696   case $BUILD_CONFIG in
2697   bootstrap-debug)
2698     if echo "int f (void) { return 0; }" > conftest.c &&
2699        ${CC} -c conftest.c &&
2700        mv conftest.o conftest.o.g0 &&
2701        ${CC} -c -g conftest.c &&
2702        mv conftest.o conftest.o.g &&
2703        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2704       :
2705     else
2706       BUILD_CONFIG=
2707     fi
2708     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2709     ;;
2710   esac
2711 fi
2712 AC_MSG_RESULT($BUILD_CONFIG)
2713 AC_SUBST(BUILD_CONFIG)
2714
2715 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2716 AC_MSG_CHECKING([for --enable-vtable-verify])
2717 AC_ARG_ENABLE(vtable-verify,
2718 [AS_HELP_STRING([--enable-vtable-verify],
2719                 [Enable vtable verification feature])],
2720 [case "$enableval" in
2721  yes) enable_vtable_verify=yes ;;
2722  no)  enable_vtable_verify=no ;;
2723  *)   enable_vtable_verify=no;;
2724  esac],
2725 [enable_vtable_verify=no])
2726 AC_MSG_RESULT($enable_vtable_verify)
2727
2728 # Record target_configdirs and the configure arguments for target and
2729 # build configuration in Makefile.
2730 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2731 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2732 bootstrap_fixincludes=no
2733
2734 # If we are building libgomp, bootstrap it.
2735 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2736   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2737 fi
2738
2739 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2740 # or bootstrap-ubsan, bootstrap it.
2741 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2742   case "$BUILD_CONFIG" in
2743     *bootstrap-asan* | *bootstrap-ubsan* )
2744       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2745       bootstrap_fixincludes=yes
2746       ;;
2747   esac
2748 fi
2749
2750 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2751 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2752    test "$enable_vtable_verify" != no; then
2753   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2754 fi
2755
2756 # If we are building libmpx, bootstrap it.
2757 if echo " ${target_configdirs} " | grep " libmpx " > /dev/null 2>&1; then
2758   bootstrap_target_libs=${bootstrap_target_libs}target-libmpx,
2759 fi
2760
2761 # Determine whether gdb needs tk/tcl or not.
2762 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2763 # and in that case we want gdb to be built without tk.  Ugh!
2764 # In fact I believe gdb is the *only* package directly dependent on tk,
2765 # so we should be able to put the 'maybe's in unconditionally and
2766 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2767 # 100% sure that that's safe though.
2768
2769 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2770 case "$enable_gdbtk" in
2771   no)
2772     GDB_TK="" ;;
2773   yes)
2774     GDB_TK="${gdb_tk}" ;;
2775   *)
2776     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2777     # distro.  Eventually someone will fix this and move Insight, nee
2778     # gdbtk to a separate directory.
2779     if test -d ${srcdir}/gdb/gdbtk ; then
2780       GDB_TK="${gdb_tk}"
2781     else
2782       GDB_TK=""
2783     fi
2784     ;;
2785 esac
2786 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2787 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2788
2789 # Strip out unwanted targets.
2790
2791 # While at that, we remove Makefiles if we were started for recursive
2792 # configuration, so that the top-level Makefile reconfigures them,
2793 # like we used to do when configure itself was recursive.
2794
2795 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2796 # but now we're fixing up the Makefile ourselves with the additional
2797 # commands passed to AC_CONFIG_FILES.  Use separate variables
2798 # extrasub-{build,host,target} not because there is any reason to split
2799 # the substitutions up that way, but only to remain below the limit of
2800 # 99 commands in a script, for HP-UX sed.
2801 # Do not nest @if/@endif pairs, because configure will not warn you at all.
2802
2803 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2804   yes:yes:*\ gold\ *:*,c++,*) ;;
2805   yes:yes:*\ gold\ *:*)
2806     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2807     ;;
2808 esac
2809
2810 extrasub_build=
2811 for module in ${build_configdirs} ; do
2812   if test -z "${no_recursion}" \
2813      && test -f ${build_subdir}/${module}/Makefile; then
2814     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2815     rm -f ${build_subdir}/${module}/Makefile
2816   fi
2817   extrasub_build="$extrasub_build
2818 /^@if build-$module\$/d
2819 /^@endif build-$module\$/d
2820 /^@if build-$module-$bootstrap_suffix\$/d
2821 /^@endif build-$module-$bootstrap_suffix\$/d"
2822 done
2823 extrasub_host=
2824 for module in ${configdirs} ; do
2825   if test -z "${no_recursion}"; then
2826     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2827       if test -f ${file}; then
2828         echo 1>&2 "*** removing ${file} to force reconfigure"
2829         rm -f ${file}
2830       fi
2831     done
2832   fi
2833   case ${module},${bootstrap_fixincludes} in
2834     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2835     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2836   esac
2837   extrasub_host="$extrasub_host
2838 /^@if $module\$/d
2839 /^@endif $module\$/d
2840 /^@if $module-$host_bootstrap_suffix\$/d
2841 /^@endif $module-$host_bootstrap_suffix\$/d"
2842 done
2843 extrasub_target=
2844 for module in ${target_configdirs} ; do
2845   if test -z "${no_recursion}" \
2846      && test -f ${target_subdir}/${module}/Makefile; then
2847     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2848     rm -f ${target_subdir}/${module}/Makefile
2849   fi
2850
2851   # We only bootstrap target libraries listed in bootstrap_target_libs.
2852   case $bootstrap_target_libs in
2853     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2854     *) target_bootstrap_suffix=no-bootstrap ;;
2855   esac
2856
2857   extrasub_target="$extrasub_target
2858 /^@if target-$module\$/d
2859 /^@endif target-$module\$/d
2860 /^@if target-$module-$target_bootstrap_suffix\$/d
2861 /^@endif target-$module-$target_bootstrap_suffix\$/d"
2862 done
2863
2864 # Do the final fixup along with target modules.
2865 extrasub_target="$extrasub_target
2866 /^@if /,/^@endif /d"
2867
2868 # Create the serialization dependencies.  This uses a temporary file.
2869
2870 AC_ARG_ENABLE([serial-configure],
2871 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
2872                 [force sequential configuration of
2873                  sub-packages for the host, target or build
2874                  machine, or all sub-packages])])
2875
2876 case ${enable_serial_configure} in
2877   yes)
2878     enable_serial_build_configure=yes
2879     enable_serial_host_configure=yes
2880     enable_serial_target_configure=yes
2881     ;;
2882 esac
2883
2884 # These force 'configure's to be done one at a time, to avoid problems
2885 # with contention over a shared config.cache.
2886 rm -f serdep.tmp
2887 echo '# serdep.tmp' > serdep.tmp
2888 olditem=
2889 test "x${enable_serial_build_configure}" = xyes &&
2890 for item in ${build_configdirs} ; do
2891   case ${olditem} in
2892     "") ;;
2893     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
2894   esac
2895   olditem=${item}
2896 done
2897 olditem=
2898 test "x${enable_serial_host_configure}" = xyes &&
2899 for item in ${configdirs} ; do
2900   case ${olditem} in
2901     "") ;;
2902     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
2903   esac
2904   olditem=${item}
2905 done
2906 olditem=
2907 test "x${enable_serial_target_configure}" = xyes &&
2908 for item in ${target_configdirs} ; do
2909   case ${olditem} in
2910     "") ;;
2911     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
2912   esac
2913   olditem=${item}
2914 done
2915 serialization_dependencies=serdep.tmp
2916 AC_SUBST_FILE(serialization_dependencies)
2917
2918 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
2919 # target, nonopt, and variable assignments.  These are the ones we
2920 # might not want to pass down to subconfigures.  The exception being
2921 # --cache-file=/dev/null, which is used to turn off the use of cache
2922 # files altogether, and which should be passed on to subconfigures.
2923 # Also strip program-prefix, program-suffix, and program-transform-name,
2924 # so that we can pass down a consistent program-transform-name.
2925 baseargs=
2926 tbaseargs=
2927 keep_next=no
2928 skip_next=no
2929 eval "set -- $ac_configure_args"
2930 for ac_arg
2931 do
2932   if test X"$skip_next" = X"yes"; then
2933     skip_next=no
2934     continue
2935   fi
2936   if test X"$keep_next" = X"yes"; then
2937     case $ac_arg in
2938       *\'*)
2939         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2940     esac
2941     baseargs="$baseargs '$ac_arg'"
2942     tbaseargs="$tbaseargs '$ac_arg'"
2943     keep_next=no
2944     continue
2945   fi
2946
2947   # Handle separated arguments.  Based on the logic generated by
2948   # autoconf 2.59.
2949   case $ac_arg in
2950     *=* | --config-cache | -C | -disable-* | --disable-* \
2951       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
2952       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
2953       | -with-* | --with-* | -without-* | --without-* | --x)
2954       separate_arg=no
2955       ;;
2956     -*)
2957       separate_arg=yes
2958       ;;
2959     *)
2960       separate_arg=no
2961       ;;
2962   esac
2963
2964   skip_targ=no
2965   case $ac_arg in
2966 changequote(,)
2967   --with-* | --without-*)
2968     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
2969
2970     case $libopt in
2971     *[-_]include)
2972       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
2973       ;;
2974     *[-_]lib)
2975       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
2976       ;;
2977     *)
2978       lib=$libopt
2979       ;;
2980     esac
2981 changequote([,])
2982
2983     case $lib in
2984     mpc | mpfr | gmp | isl)
2985       # If we're processing --with-$lib, --with-$lib-include or
2986       # --with-$lib-lib, for one of the libs above, and target is
2987       # different from host, don't pass the current argument to any
2988       # target library's configure.
2989       if test x$is_cross_compiler = xyes; then
2990         skip_targ=yes
2991       fi
2992       ;;
2993     esac
2994     ;;
2995   esac
2996
2997   case "$ac_arg" in
2998     --cache-file=/dev/null | \
2999     -cache-file=/dev/null )
3000       # Handled here to avoid the test to skip args below.
3001       baseargs="$baseargs '$ac_arg'"
3002       tbaseargs="$tbaseargs '$ac_arg'"
3003       # Assert: $separate_arg should always be no.
3004       keep_next=$separate_arg
3005       ;;
3006     --no*)
3007       continue
3008       ;;
3009     --c* | \
3010     --sr* | \
3011     --ho* | \
3012     --bu* | \
3013     --t* | \
3014     --program-* | \
3015     -cache_file* | \
3016     -srcdir* | \
3017     -host* | \
3018     -build* | \
3019     -target* | \
3020     -program-prefix* | \
3021     -program-suffix* | \
3022     -program-transform-name* )
3023       skip_next=$separate_arg
3024       continue
3025       ;;
3026     -*)
3027       # An option.  Add it.
3028       case $ac_arg in
3029         *\'*)
3030           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3031       esac
3032       baseargs="$baseargs '$ac_arg'"
3033       if test X"$skip_targ" = Xno; then
3034         tbaseargs="$tbaseargs '$ac_arg'"
3035       fi
3036       keep_next=$separate_arg
3037       ;;
3038     *)
3039       # Either a variable assignment, or a nonopt (triplet).  Don't
3040       # pass it down; let the Makefile handle this.
3041       continue
3042       ;;
3043   esac
3044 done
3045 # Remove the initial space we just introduced and, as these will be
3046 # expanded by make, quote '$'.
3047 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3048
3049 # Add in --program-transform-name, after --program-prefix and
3050 # --program-suffix have been applied to it.  Autoconf has already
3051 # doubled dollar signs and backslashes in program_transform_name; we want
3052 # the backslashes un-doubled, and then the entire thing wrapped in single
3053 # quotes, because this will be expanded first by make and then by the shell.
3054 # Also, because we want to override the logic in subdir configure scripts to
3055 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3056 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3057 ${program_transform_name}
3058 EOF_SED
3059 gcc_transform_name=`cat conftestsed.out`
3060 rm -f conftestsed.out
3061 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3062 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3063 if test "$silent" = yes; then
3064   baseargs="$baseargs --silent"
3065   tbaseargs="$tbaseargs --silent"
3066 fi
3067 baseargs="$baseargs --disable-option-checking"
3068 tbaseargs="$tbaseargs --disable-option-checking"
3069
3070 # Record and document user additions to sub configure arguments.
3071 AC_ARG_VAR([build_configargs],
3072            [additional configure arguments for build directories])
3073 AC_ARG_VAR([host_configargs],
3074            [additional configure arguments for host directories])
3075 AC_ARG_VAR([target_configargs],
3076            [additional configure arguments for target directories])
3077
3078 # For the build-side libraries, we just need to pretend we're native,
3079 # and not use the same cache file.  Multilibs are neither needed nor
3080 # desired.  We can't even use the same cache file for all build-side
3081 # libraries, as they're compiled differently; some with C, some with
3082 # C++ or with different feature-enabling options.
3083 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3084
3085 # For host modules, accept cache file option, or specification as blank.
3086 case "${cache_file}" in
3087 "") # empty
3088   cache_file_option="" ;;
3089 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3090   cache_file_option="--cache-file=${cache_file}" ;;
3091 *) # relative path
3092   cache_file_option="--cache-file=../${cache_file}" ;;
3093 esac
3094
3095 # Host dirs don't like to share a cache file either, horribly enough.
3096 # This seems to be due to autoconf 2.5x stupidity.
3097 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3098
3099 target_configargs="$target_configargs ${tbaseargs}"
3100
3101 # Passing a --with-cross-host argument lets the target libraries know
3102 # whether they are being built with a cross-compiler or being built
3103 # native.  However, it would be better to use other mechanisms to make the
3104 # sorts of decisions they want to make on this basis.  Please consider
3105 # this option to be deprecated.  FIXME.
3106 if test x${is_cross_compiler} = xyes ; then
3107   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3108 fi
3109
3110 # Special user-friendly check for native x86_64-linux build, if
3111 # multilib is not explicitly enabled.
3112 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3113   x86_64-*linux*:yes:$build:$build:)
3114     # Make sure we have a development environment that handles 32-bit
3115     dev64=no
3116     echo "int main () { return 0; }" > conftest.c
3117     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3118     if test $? = 0 ; then
3119       if test -s conftest || test -s conftest.exe ; then
3120         dev64=yes
3121       fi
3122     fi
3123     rm -f conftest*
3124     if test x${dev64} != xyes ; then
3125       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.])
3126     fi
3127     ;;
3128 esac
3129
3130 # Default to --enable-multilib.
3131 if test x${enable_multilib} = x ; then
3132   target_configargs="--enable-multilib ${target_configargs}"
3133 fi
3134
3135 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3136 # changed from the earlier setting of with_newlib.
3137 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3138   target_configargs="--with-newlib ${target_configargs}"
3139 fi
3140
3141 # Different target subdirs use different values of certain variables
3142 # (notably CXX).  Worse, multilibs use *lots* of different values.
3143 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3144 # it doesn't automatically accept command-line overrides of them.
3145 # This means it's not safe for target subdirs to share a cache file,
3146 # which is disgusting, but there you have it.  Hopefully this can be
3147 # fixed in future.  It's still worthwhile to use a cache file for each
3148 # directory.  I think.
3149
3150 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3151 # We need to pass --target, as newer autoconf's requires consistency
3152 # for target_alias and gcc doesn't manage it consistently.
3153 target_configargs="--cache-file=./config.cache ${target_configargs}"
3154
3155 FLAGS_FOR_TARGET=
3156 case " $target_configdirs " in
3157  *" newlib "*)
3158   case " $target_configargs " in
3159   *" --with-newlib "*)
3160    case "$target" in
3161     *-cygwin*)
3162       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3163       ;;
3164    esac
3165
3166    # If we're not building GCC, don't discard standard headers.
3167    if test -d ${srcdir}/gcc; then
3168      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3169
3170      if test "${build}" != "${host}"; then
3171        # On Canadian crosses, CC_FOR_TARGET will have already been set
3172        # by `configure', so we won't have an opportunity to add -Bgcc/
3173        # to it.  This is right: we don't want to search that directory
3174        # for binaries, but we want the header files in there, so add
3175        # them explicitly.
3176        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3177
3178        # Someone might think of using the pre-installed headers on
3179        # Canadian crosses, in case the installed compiler is not fully
3180        # compatible with the compiler being built.  In this case, it
3181        # would be better to flag an error than risking having
3182        # incompatible object files being constructed.  We can't
3183        # guarantee that an error will be flagged, but let's hope the
3184        # compiler will do it, when presented with incompatible header
3185        # files.
3186      fi
3187    fi
3188
3189    case "${target}-${is_cross_compiler}" in
3190    i[[3456789]]86-*-linux*-no)
3191       # Here host == target, so we don't need to build gcc,
3192       # so we don't want to discard standard headers.
3193       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3194       ;;
3195    *)
3196       # If we're building newlib, use its generic headers last, but search
3197       # for any libc-related directories first (so make it the last -B
3198       # switch).
3199       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3200
3201       # If we're building libgloss, find the startup file, simulator library
3202       # and linker script.
3203       case " $target_configdirs " in
3204         *" libgloss "*)
3205         # Look for startup file, simulator library and maybe linker script.
3206         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3207         # Look for libnosys.a in case the target needs it.
3208         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3209         # Most targets have the linker script in the source directory.
3210         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3211         ;;
3212       esac
3213       ;;
3214    esac
3215    ;;
3216   esac
3217   ;;
3218 esac
3219
3220 case "$target" in
3221   x86_64-*mingw* | *-w64-mingw*)
3222   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3223   # however, use a symlink named 'mingw' in ${prefix} .
3224     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3225     ;;
3226   *-mingw*)
3227   # MinGW can't be handled as Cygwin above since it does not use newlib.
3228     FLAGS_FOR_TARGET=$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'
3229     ;;
3230 esac
3231
3232 # Allow the user to override the flags for
3233 # our build compiler if desired.
3234 if test x"${build}" = x"${host}" ; then
3235   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3236   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3237   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3238 fi
3239
3240 # On Canadian crosses, we'll be searching the right directories for
3241 # the previously-installed cross compiler, so don't bother to add
3242 # flags for directories within the install tree of the compiler
3243 # being built; programs in there won't even run.
3244 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3245   # Search for pre-installed headers if nothing else fits.
3246   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3247 fi
3248
3249 if test "x${use_gnu_ld}" = x &&
3250    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3251   # Arrange for us to find uninstalled linker scripts.
3252   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3253 fi
3254
3255 # Search for other target-specific linker scripts and such.
3256 case "${target}" in
3257   mep*)
3258     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3259     ;;
3260 esac
3261
3262 # Makefile fragments.
3263 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3264 do
3265   eval fragval=\$$frag
3266   if test $fragval != /dev/null; then
3267     eval $frag=${srcdir}/$fragval
3268   fi
3269 done
3270 AC_SUBST_FILE(host_makefile_frag)
3271 AC_SUBST_FILE(target_makefile_frag)
3272 AC_SUBST_FILE(alphaieee_frag)
3273 AC_SUBST_FILE(ospace_frag)
3274
3275 # Miscellanea: directories, flags, etc.
3276 AC_SUBST(RPATH_ENVVAR)
3277 AC_SUBST(GCC_SHLIB_SUBDIR)
3278 AC_SUBST(tooldir)
3279 AC_SUBST(build_tooldir)
3280 AC_SUBST(CONFIGURE_GDB_TK)
3281 AC_SUBST(GDB_TK)
3282 AC_SUBST(INSTALL_GDB_TK)
3283
3284 # Build module lists & subconfigure args.
3285 AC_SUBST(build_configargs)
3286 AC_SUBST(build_configdirs)
3287
3288 # Host module lists & subconfigure args.
3289 AC_SUBST(host_configargs)
3290 AC_SUBST(configdirs)
3291 AC_SUBST(target_configdirs)
3292
3293 # Target module lists & subconfigure args.
3294 AC_SUBST(target_configargs)
3295
3296
3297 # Build tools.
3298 AC_SUBST(AR_FOR_BUILD)
3299 AC_SUBST(AS_FOR_BUILD)
3300 AC_SUBST(CC_FOR_BUILD)
3301 AC_SUBST(CFLAGS_FOR_BUILD)
3302 AC_SUBST(CXXFLAGS_FOR_BUILD)
3303 AC_SUBST(CXX_FOR_BUILD)
3304 AC_SUBST(DLLTOOL_FOR_BUILD)
3305 AC_SUBST(GCJ_FOR_BUILD)
3306 AC_SUBST(GFORTRAN_FOR_BUILD)
3307 AC_SUBST(GOC_FOR_BUILD)
3308 AC_SUBST(LDFLAGS_FOR_BUILD)
3309 AC_SUBST(LD_FOR_BUILD)
3310 AC_SUBST(NM_FOR_BUILD)
3311 AC_SUBST(RANLIB_FOR_BUILD)
3312 AC_SUBST(WINDMC_FOR_BUILD)
3313 AC_SUBST(WINDRES_FOR_BUILD)
3314
3315 # Generate default definitions for YACC, M4, LEX and other programs that run
3316 # on the build machine.  These are used if the Makefile can't locate these
3317 # programs in objdir.
3318 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3319
3320 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3321 case " $build_configdirs " in
3322   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3323 esac
3324
3325 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3326 case " $build_configdirs " in
3327   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3328 esac
3329
3330 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3331 case " $build_configdirs " in
3332   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3333 esac
3334
3335 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3336 case " $build_configdirs " in
3337   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3338   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3339 esac
3340
3341 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3342 case " $build_configdirs " in
3343   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3344 esac
3345
3346 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3347 case " $build_configdirs " in
3348   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3349   *)
3350 changequote(,)
3351     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3352     # higher, else we use the "missing" dummy.
3353     if ${MAKEINFO} --version \
3354        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3355       :
3356     else
3357       MAKEINFO="$MISSING makeinfo"
3358     fi
3359     ;;
3360 changequote([,])
3361 esac
3362
3363 # FIXME: expect and dejagnu may become build tools?
3364
3365 AC_CHECK_PROGS(EXPECT, expect, expect)
3366 case " $configdirs " in
3367   *" expect "*)
3368     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3369     ;;
3370 esac
3371
3372 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3373 case " $configdirs " in
3374   *" dejagnu "*)
3375     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3376     ;;
3377 esac
3378
3379
3380 # Host tools.
3381 NCN_STRICT_CHECK_TOOLS(AR, ar)
3382 NCN_STRICT_CHECK_TOOLS(AS, as)
3383 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3384 NCN_STRICT_CHECK_TOOLS(LD, ld)
3385 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3386 NCN_STRICT_CHECK_TOOLS(NM, nm)
3387 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3388 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3389 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3390 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3391 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3392 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3393 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3394 AC_SUBST(CC)
3395 AC_SUBST(CXX)
3396 AC_SUBST(CFLAGS)
3397 AC_SUBST(CXXFLAGS)
3398
3399 # Target tools.
3400 AC_ARG_WITH([build-time-tools],
3401   [AS_HELP_STRING([--with-build-time-tools=PATH],
3402                   [use given path to find target tools during the build])],
3403   [case x"$withval" in
3404      x/*) ;;
3405      *)
3406        with_build_time_tools=
3407        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3408        ;;
3409    esac],
3410   [with_build_time_tools=])
3411
3412 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3413 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3414 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3415 NCN_STRICT_CHECK_TARGET_TOOLS(GCJ_FOR_TARGET, gcj)
3416 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3417 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3418
3419 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3420 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3421 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3422 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3423 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3424 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3425 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3426 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3427 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3428 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3429 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3430 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3431 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3432
3433 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3434
3435 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3436 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3437 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3438 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3439 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3440                 [gcc/xg++ -B$$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$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3441                 c++)
3442 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3443                 [gcc/xgcc -shared-libgcc -B$$r/$(HOST_SUBDIR)/gcc -nostdinc++ -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3444                 c++)
3445 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3446 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3447 GCC_TARGET_TOOL(gcj, GCJ_FOR_TARGET, GCJ,
3448                 [gcc/gcj -B$$r/$(HOST_SUBDIR)/gcc/], java)
3449 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3450                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3451 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3452                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3453 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3454 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3455 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3456 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3457 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3458 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3459 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3460 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3461 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3462 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3463
3464 AC_SUBST(FLAGS_FOR_TARGET)
3465 AC_SUBST(RAW_CXX_FOR_TARGET)
3466
3467 # Certain tools may need extra flags.
3468 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3469 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3470 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3471
3472 # When building target libraries, except in a Canadian cross, we use
3473 # the same toolchain as the compiler we just built.
3474 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3475 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3476 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3477 if test $host = $build; then
3478   case " $configdirs " in
3479     *" gcc "*)
3480       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3481       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3482       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3483       ;;
3484   esac
3485 fi
3486
3487 AC_SUBST(COMPILER_AS_FOR_TARGET)
3488 AC_SUBST(COMPILER_LD_FOR_TARGET)
3489 AC_SUBST(COMPILER_NM_FOR_TARGET)
3490
3491 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3492 AC_ARG_ENABLE(maintainer-mode,
3493 [AS_HELP_STRING([--enable-maintainer-mode],
3494                 [enable make rules and dependencies not useful
3495                  (and sometimes confusing) to the casual installer])],
3496       USE_MAINTAINER_MODE=$enableval,
3497       USE_MAINTAINER_MODE=no)
3498 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3499 AC_SUBST(MAINTAINER_MODE_TRUE)
3500 AC_SUBST(MAINTAINER_MODE_FALSE)
3501 if test "$USE_MAINTAINER_MODE" = yes; then
3502   MAINTAINER_MODE_TRUE=
3503   MAINTAINER_MODE_FALSE='#'
3504 else
3505   MAINTAINER_MODE_TRUE='#'
3506   MAINTAINER_MODE_FALSE=
3507 fi
3508 MAINT=$MAINTAINER_MODE_TRUE
3509 AC_SUBST(MAINT)dnl
3510
3511 # ---------------------
3512 # GCC bootstrap support
3513 # ---------------------
3514
3515 # Stage specific cflags for build.
3516 stage1_cflags="-g"
3517 case $build in
3518   vax-*-*)
3519     case ${GCC} in
3520       yes) stage1_cflags="-g -Wa,-J" ;;
3521       *) stage1_cflags="-g -J" ;;
3522     esac ;;
3523 esac
3524
3525 AC_SUBST(stage1_cflags)
3526
3527 # Enable --enable-checking in stage1 of the compiler.
3528 AC_ARG_ENABLE(stage1-checking,
3529 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3530                 [choose additional checking for stage1 of the compiler])],
3531 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3532 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3533   # For --disable-checking or implicit --enable-checking=release, avoid
3534   # setting --enable-checking=gc in the default stage1 checking for LTO
3535   # bootstraps.  See PR62077.
3536   stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types
3537   case $BUILD_CONFIG in
3538     *lto*)
3539       if test "x$enable_checking" = x && \
3540          test -d ${srcdir}/gcc && \
3541          test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3542         stage1_checking=--enable-checking=yes,types
3543       fi;;
3544     *) stage1_checking=--enable-checking=yes,types;;
3545   esac
3546 else
3547   stage1_checking=--enable-checking=$enable_checking,types
3548 fi])
3549 AC_SUBST(stage1_checking)
3550
3551 # Enable -Werror in bootstrap stage2 and later.
3552 AC_ARG_ENABLE(werror,
3553 [AS_HELP_STRING([--enable-werror],
3554                 [enable -Werror in bootstrap stage2 and later])], [],
3555 [if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3556   enable_werror=yes
3557 else
3558   enable_werror=no
3559 fi])
3560 case ${enable_werror} in
3561   yes) stage2_werror_flag="--enable-werror-always" ;;
3562   *) stage2_werror_flag="" ;;
3563 esac
3564 AC_SUBST(stage2_werror_flag)
3565
3566 # Enable --enable-host-shared.
3567 AC_ARG_ENABLE(host-shared,
3568 [AS_HELP_STRING([--enable-host-shared],
3569                 [build host code as shared libraries])],
3570 [host_shared=$enableval], [host_shared=no])
3571 AC_SUBST(host_shared)
3572
3573 # PR jit/64780: Require the user to explicitly specify
3574 # --enable-host-shared if the jit is enabled, hinting
3575 # that they might want to do a separate configure/build of
3576 # the jit, to avoid users from slowing down the rest of the
3577 # compiler by enabling the jit.
3578 if test ${host_shared} = "no" ; then
3579   case "${enable_languages}" in
3580     *jit*)
3581       AC_MSG_ERROR([
3582 Enabling language "jit" requires --enable-host-shared.
3583
3584 --enable-host-shared typically slows the rest of the compiler down by
3585 a few %, so you must explicitly enable it.
3586
3587 If you want to build both the jit and the regular compiler, it is often
3588 best to do this via two separate configure/builds, in separate
3589 directories, to avoid imposing the performance cost of
3590 --enable-host-shared on the regular compiler.])
3591       ;;
3592     *)
3593       ;;
3594   esac
3595 fi
3596
3597 # Specify what files to not compare during bootstrap.
3598
3599 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3600 case "$target" in
3601   hppa*64*-*-hpux*) ;;
3602   hppa*-*-hpux*) compare_exclusions="gcc/cc*-checksum\$(objext) | */libgcc/lib2funcs* | gcc/ada/*tools/*" ;;
3603   powerpc*-ibm-aix*) compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/* | *libgomp*\$(objext)" ;;
3604 esac
3605 AC_SUBST(compare_exclusions)
3606
3607 AC_CONFIG_FILES([Makefile],
3608   [sed "$extrasub_build" Makefile |
3609    sed "$extrasub_host" |
3610    sed "$extrasub_target" > mf$$
3611    mv -f mf$$ Makefile],
3612   [extrasub_build="$extrasub_build"
3613    extrasub_host="$extrasub_host"
3614    extrasub_target="$extrasub_target"])
3615 AC_OUTPUT