configure.ac

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