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   CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CPP)}"
1338   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1339   DSYMUTIL_FOR_BUILD=${DSYMUTIL_FOR_BUILD-dsymutil}
1340   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1341   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1342   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1343   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1344   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1345   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1346   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1347   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1348   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1349 else
1350   AR_FOR_BUILD="\$(AR)"
1351   AS_FOR_BUILD="\$(AS)"
1352   CC_FOR_BUILD="\$(CC)"
1353   CXX_FOR_BUILD="\$(CXX)"
1354   DSYMUTIL_FOR_BUILD="\$(DSYMUTIL)"
1355   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1356   GOC_FOR_BUILD="\$(GOC)"
1357   GDC_FOR_BUILD="\$(GDC)"
1358   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1359   LD_FOR_BUILD="\$(LD)"
1360   NM_FOR_BUILD="\$(NM)"
1361   RANLIB_FOR_BUILD="\$(RANLIB)"
1362   WINDRES_FOR_BUILD="\$(WINDRES)"
1363   WINDMC_FOR_BUILD="\$(WINDMC)"
1364 fi
1365
1366 AC_PROG_CC_C99
1367 AC_PROG_CXX
1368
1369 # We must set the default linker to the linker used by gcc for the correct
1370 # operation of libtool.  If LD is not defined and we are using gcc, try to
1371 # set the LD default to the ld used by gcc.
1372 if test -z "$LD"; then
1373   if test "$GCC" = yes; then
1374     case $build in
1375     *-*-mingw*)
1376       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1377     *)
1378       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1379     esac
1380     case $gcc_prog_ld in
1381     # Accept absolute paths.
1382     [[\\/]* | [A-Za-z]:[\\/]*)]
1383       LD="$gcc_prog_ld" ;;
1384     esac
1385   fi
1386 fi
1387
1388 # Check whether -static-libstdc++ -static-libgcc is supported.
1389 have_static_libs=no
1390 if test "$GCC" = yes; then
1391   saved_LDFLAGS="$LDFLAGS"
1392
1393   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1394   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1395   AC_LANG_PUSH(C++)
1396   AC_LINK_IFELSE([AC_LANG_SOURCE([
1397 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1398 #error -static-libstdc++ not implemented
1399 #endif
1400 int main() {}])],
1401     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1402     [AC_MSG_RESULT([no])])
1403   AC_LANG_POP(C++)
1404
1405   LDFLAGS="$saved_LDFLAGS"
1406 fi
1407
1408 ACX_PROG_GNAT
1409 ACX_PROG_CMP_IGNORE_INITIAL
1410
1411 AC_ARG_ENABLE([bootstrap],
1412 [AS_HELP_STRING([--enable-bootstrap],
1413                 [enable bootstrapping @<:@yes if native build@:>@])],,
1414 enable_bootstrap=default)
1415
1416 # Issue errors and warnings for invalid/strange bootstrap combinations.
1417 if test -r $srcdir/gcc/configure; then
1418   have_compiler=yes
1419 else
1420   have_compiler=no
1421 fi
1422
1423 case "$have_compiler:$host:$target:$enable_bootstrap" in
1424   *:*:*:no) ;;
1425
1426   # Default behavior.  Enable bootstrap if we have a compiler
1427   # and we are in a native configuration.
1428   yes:$build:$build:default)
1429     enable_bootstrap=yes ;;
1430
1431   *:*:*:default)
1432     enable_bootstrap=no ;;
1433
1434   # We have a compiler and we are in a native configuration, bootstrap is ok
1435   yes:$build:$build:yes)
1436     ;;
1437
1438   # Other configurations, but we have a compiler.  Assume the user knows
1439   # what he's doing.
1440   yes:*:*:yes)
1441     AC_MSG_WARN([trying to bootstrap a cross compiler])
1442     ;;
1443
1444   # No compiler: if they passed --enable-bootstrap explicitly, fail
1445   no:*:*:yes)
1446     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1447
1448   # Fail if wrong command line
1449   *)
1450     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1451     ;;
1452 esac
1453
1454 # When bootstrapping with GCC, build stage 1 in C++11 mode to ensure that a
1455 # C++11 compiler can still start the bootstrap.  Otherwise, if building GCC,
1456 # require C++11 (or higher).
1457 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1458   CXX="$CXX -std=c++11"
1459 elif test "$have_compiler" = yes; then
1460   AX_CXX_COMPILE_STDCXX(11)
1461
1462   if test "${build}" != "${host}"; then
1463     AX_CXX_COMPILE_STDCXX(11, [], [], [_FOR_BUILD])
1464   fi
1465 fi
1466
1467 # Used for setting $lt_cv_objdir
1468 _LT_CHECK_OBJDIR
1469
1470 # Check for GMP, MPFR and MPC
1471 gmplibs="-lmpc -lmpfr -lgmp"
1472 gmpinc=
1473 have_gmp=no
1474
1475 # Specify a location for mpc
1476 # check for this first so it ends up on the link line before mpfr.
1477 AC_ARG_WITH(mpc,
1478 [AS_HELP_STRING([--with-mpc=PATH],
1479                 [specify prefix directory for installed MPC package.
1480                  Equivalent to --with-mpc-include=PATH/include
1481                  plus --with-mpc-lib=PATH/lib])])
1482 AC_ARG_WITH(mpc-include,
1483 [AS_HELP_STRING([--with-mpc-include=PATH],
1484                 [specify directory for installed MPC include files])])
1485 AC_ARG_WITH(mpc-lib,
1486 [AS_HELP_STRING([--with-mpc-lib=PATH],
1487                 [specify directory for the installed MPC library])])
1488
1489 if test "x$with_mpc" != x; then
1490   gmplibs="-L$with_mpc/lib $gmplibs"
1491   gmpinc="-I$with_mpc/include $gmpinc"
1492 fi
1493 if test "x$with_mpc_include" != x; then
1494   gmpinc="-I$with_mpc_include $gmpinc"
1495 fi
1496 if test "x$with_mpc_lib" != x; then
1497   gmplibs="-L$with_mpc_lib $gmplibs"
1498 fi
1499 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1500   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1501   gmpinc='-I$$s/mpc/src '"$gmpinc"
1502   # Do not test the mpc version.  Assume that it is sufficient, since
1503   # it is in the source tree, and the library has not been built yet
1504   # but it would be included on the link line in the version check below
1505   # hence making the test fail.
1506   have_gmp=yes
1507 fi
1508
1509 # Specify a location for mpfr
1510 # check for this first so it ends up on the link line before gmp.
1511 AC_ARG_WITH(mpfr-dir,
1512 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1513 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1514 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1515
1516 AC_ARG_WITH(mpfr,
1517 [AS_HELP_STRING([--with-mpfr=PATH],
1518                 [specify prefix directory for installed MPFR package.
1519                  Equivalent to --with-mpfr-include=PATH/include
1520                  plus --with-mpfr-lib=PATH/lib])])
1521 AC_ARG_WITH(mpfr-include,
1522 [AS_HELP_STRING([--with-mpfr-include=PATH],
1523                 [specify directory for installed MPFR include files])])
1524 AC_ARG_WITH(mpfr-lib,
1525 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1526                 [specify directory for the installed MPFR library])])
1527
1528 if test "x$with_mpfr" != x; then
1529   gmplibs="-L$with_mpfr/lib $gmplibs"
1530   gmpinc="-I$with_mpfr/include $gmpinc"
1531 fi
1532 if test "x$with_mpfr_include" != x; then
1533   gmpinc="-I$with_mpfr_include $gmpinc"
1534 fi
1535 if test "x$with_mpfr_lib" != x; then
1536   gmplibs="-L$with_mpfr_lib $gmplibs"
1537 fi
1538 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1539   # MPFR v3.1.0 moved the sources into a src sub-directory.
1540   if ! test -d ${srcdir}/mpfr/src; then
1541     AC_MSG_ERROR([dnl
1542 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1543   fi
1544   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1545   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1546   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1547   # Do not test the mpfr version.  Assume that it is sufficient, since
1548   # it is in the source tree, and the library has not been built yet
1549   # but it would be included on the link line in the version check below
1550   # hence making the test fail.
1551   have_gmp=yes
1552 fi
1553
1554 # Specify a location for gmp
1555 AC_ARG_WITH(gmp-dir,
1556 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1557 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1558 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1559
1560 AC_ARG_WITH(gmp,
1561 [AS_HELP_STRING([--with-gmp=PATH],
1562                 [specify prefix directory for the installed GMP package.
1563                  Equivalent to --with-gmp-include=PATH/include
1564                  plus --with-gmp-lib=PATH/lib])])
1565 AC_ARG_WITH(gmp-include,
1566 [AS_HELP_STRING([--with-gmp-include=PATH],
1567                 [specify directory for installed GMP include files])])
1568 AC_ARG_WITH(gmp-lib,
1569 [AS_HELP_STRING([--with-gmp-lib=PATH],
1570                 [specify directory for the installed GMP library])])
1571
1572
1573 if test "x$with_gmp" != x; then
1574   gmplibs="-L$with_gmp/lib $gmplibs"
1575   gmpinc="-I$with_gmp/include $gmpinc"
1576 fi
1577 if test "x$with_gmp_include" != x; then
1578   gmpinc="-I$with_gmp_include $gmpinc"
1579 fi
1580 if test "x$with_gmp_lib" != x; then
1581   gmplibs="-L$with_gmp_lib $gmplibs"
1582 fi
1583 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1584   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1585   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1586   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1587   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1588   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1589   # Do not test the gmp version.  Assume that it is sufficient, since
1590   # it is in the source tree, and the library has not been built yet
1591   # but it would be included on the link line in the version check below
1592   # hence making the test fail.
1593   have_gmp=yes
1594 fi
1595
1596 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1597   have_gmp=yes
1598   saved_CFLAGS="$CFLAGS"
1599   CFLAGS="$CFLAGS $gmpinc"
1600   # Check for the recommended and required versions of GMP.
1601   AC_MSG_CHECKING([for the correct version of gmp.h])
1602   AC_TRY_COMPILE([#include "gmp.h"],[
1603   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1604   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1605   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1606   choke me
1607   #endif
1608   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1609   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1610   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1611   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1612   choke me
1613   #endif
1614   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1615    [AC_MSG_RESULT([no]); have_gmp=no])
1616
1617   # If we have GMP, check the MPFR version.
1618   if test x"$have_gmp" = xyes; then
1619     # Check for the recommended and required versions of MPFR.
1620     AC_MSG_CHECKING([for the correct version of mpfr.h])
1621     AC_TRY_COMPILE([#include <gmp.h>
1622     #include <mpfr.h>],[
1623     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,0)
1624     choke me
1625     #endif
1626     ], [AC_TRY_COMPILE([#include <gmp.h>
1627     #include <mpfr.h>],[
1628     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,6)
1629     choke me
1630     #endif
1631     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1632      [AC_MSG_RESULT([no]); have_gmp=no])
1633   fi
1634
1635   # Check for the MPC header version.
1636   if test x"$have_gmp" = xyes ; then
1637     # Check for the recommended and required versions of MPC.
1638     AC_MSG_CHECKING([for the correct version of mpc.h])
1639     AC_TRY_COMPILE([#include <mpc.h>],[
1640     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1641     choke me
1642     #endif
1643     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1644     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1645     choke me
1646     #endif
1647     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1648      [AC_MSG_RESULT([no]); have_gmp=no])
1649   fi
1650
1651   # Now check the MPFR library.
1652   if test x"$have_gmp" = xyes; then
1653     saved_LIBS="$LIBS"
1654     LIBS="$LIBS $gmplibs"
1655     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1656     AC_TRY_LINK([#include <mpc.h>],[
1657     mpfr_t n;
1658     mpfr_t x;
1659     mpc_t c;
1660     int t;
1661     mpfr_init (n);
1662     mpfr_init (x);
1663     mpfr_atan2 (n, n, x, MPFR_RNDN);
1664     mpfr_erfc (n, x, MPFR_RNDN);
1665     mpfr_subnormalize (x, t, MPFR_RNDN);
1666     mpfr_clear(n);
1667     mpfr_clear(x);
1668     mpc_init2 (c, 53);
1669     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1670     mpc_cosh (c, c, MPC_RNDNN);
1671     mpc_pow (c, c, c, MPC_RNDNN);
1672     mpc_acosh (c, c, MPC_RNDNN);
1673     mpc_clear (c);
1674     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1675     LIBS="$saved_LIBS"
1676   fi
1677
1678   CFLAGS="$saved_CFLAGS"
1679
1680 # The library versions listed in the error message below should match
1681 # the HARD-minimums enforced above.
1682   if test x$have_gmp != xyes; then
1683     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 3.1.0+ and MPC 0.8.0+.
1684 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1685 their locations.  Source code for these libraries can be found at
1686 their respective hosting sites as well as at
1687 https://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1688 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1689 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1690 make sure that you have installed both the libraries and the header
1691 files.  They may be located in separate packages.])
1692   fi
1693 fi
1694
1695 # Flags needed for both GMP, MPFR and/or MPC.
1696 AC_SUBST(gmplibs)
1697 AC_SUBST(gmpinc)
1698 AC_SUBST(extra_mpfr_configure_flags)
1699 AC_SUBST(extra_mpc_gmp_configure_flags)
1700 AC_SUBST(extra_mpc_mpfr_configure_flags)
1701 AC_SUBST(extra_isl_gmp_configure_flags)
1702
1703 # Libraries to use for stage1 or when not bootstrapping.
1704 AC_ARG_WITH(stage1-libs,
1705 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1706 [if test "$withval" = "no" -o "$withval" = "yes"; then
1707    stage1_libs=
1708  else
1709    stage1_libs=$withval
1710  fi],
1711 [stage1_libs=])
1712 AC_SUBST(stage1_libs)
1713
1714 # Whether or not to use -static-libstdc++ and -static-libgcc.  The
1715 # default is yes if gcc is being built; no otherwise.  The reason for
1716 # this default is that gdb is sometimes linked against GNU Source
1717 # Highlight, which is a shared library that uses C++ exceptions.  In
1718 # this case, -static-libstdc++ will cause crashes.
1719 AC_ARG_WITH(static-standard-libraries,
1720 [AS_HELP_STRING([--with-static-standard-libraries],
1721                 [use -static-libstdc++ and -static-libgcc (default=auto)])],
1722 [], [with_static_standard_libraries=auto])
1723 if test "$with_static_standard_libraries" = auto; then
1724   with_static_standard_libraries=$have_compiler
1725 fi
1726
1727 # Linker flags to use for stage1 or when not bootstrapping.
1728 AC_ARG_WITH(stage1-ldflags,
1729 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1730 [if test "$withval" = "no" -o "$withval" = "yes"; then
1731    stage1_ldflags=
1732  else
1733    stage1_ldflags=$withval
1734  fi],
1735 [stage1_ldflags=
1736  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1737  # if supported.  But if the user explicitly specified the libraries to use,
1738  # trust that they are doing what they want.
1739  if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
1740      -a "$have_static_libs" = yes; then
1741    stage1_ldflags="-static-libstdc++ -static-libgcc"
1742  fi])
1743 AC_SUBST(stage1_ldflags)
1744
1745 # Libraries to use for stage2 and later builds.
1746 AC_ARG_WITH(boot-libs,
1747 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1748 [if test "$withval" = "no" -o "$withval" = "yes"; then
1749    poststage1_libs=
1750  else
1751    poststage1_libs=$withval
1752  fi],
1753 [poststage1_libs=])
1754 AC_SUBST(poststage1_libs)
1755
1756 # Linker flags to use for stage2 and later builds.
1757 AC_ARG_WITH(boot-ldflags,
1758 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1759                 [linker flags for stage2 and later])],
1760 [if test "$withval" = "no" -o "$withval" = "yes"; then
1761    poststage1_ldflags=
1762  else
1763    poststage1_ldflags=$withval
1764  fi],
1765 [poststage1_ldflags=
1766  # In stages 2 and 3, default to linking libstdc++ and libgcc
1767  # statically.  But if the user explicitly specified the libraries to
1768  # use, trust that they are doing what they want.
1769  if test "$poststage1_libs" = ""; then
1770    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1771  fi])
1772 AC_SUBST(poststage1_ldflags)
1773
1774 # GCC GRAPHITE dependency isl.
1775 # Basic setup is inlined here, actual checks are in config/isl.m4
1776
1777 AC_ARG_WITH(isl,
1778   [AS_HELP_STRING(
1779    [--with-isl=PATH],
1780    [Specify prefix directory for the installed isl package.
1781     Equivalent to --with-isl-include=PATH/include
1782     plus --with-isl-lib=PATH/lib])])
1783
1784 # Treat --without-isl as a request to disable
1785 # GRAPHITE support and skip all following checks.
1786 if test "x$with_isl" != "xno"; then
1787   # Check for isl
1788   dnl Provide configure switches and initialize islinc & isllibs
1789   dnl with user input.
1790   ISL_INIT_FLAGS
1791   dnl The versions of isl that work for Graphite
1792   ISL_CHECK_VERSION()
1793   dnl Only execute fail-action, if isl has been requested.
1794   ISL_IF_FAILED([
1795     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1796 fi
1797
1798 # If the isl check failed, disable builds of in-tree variant of isl
1799 if test "x$with_isl" = xno ||
1800    test "x$gcc_cv_isl" = xno; then
1801   noconfigdirs="$noconfigdirs isl"
1802   islinc=
1803 fi
1804
1805 AC_SUBST(isllibs)
1806 AC_SUBST(islinc)
1807
1808 # Check for LTO support.
1809 AC_ARG_ENABLE(lto,
1810 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1811 enable_lto=$enableval,
1812 enable_lto=yes; default_enable_lto=yes)
1813
1814 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1815   build_lto_plugin=yes
1816 ],[if test x"$default_enable_lto" = x"yes" ; then
1817     case $target in
1818       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1819       # On other non-ELF platforms, LTO has yet to be validated.
1820       *) enable_lto=no ;;
1821     esac
1822   else
1823   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1824   # It would also be nice to check the binutils support, but we don't
1825   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1826   # warn during gcc/ subconfigure; unless you're bootstrapping with
1827   # -flto it won't be needed until after installation anyway.
1828     case $target in
1829       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1830       *) if test x"$enable_lto" = x"yes"; then
1831         AC_MSG_ERROR([LTO support is not enabled for this target.])
1832         fi
1833       ;;
1834     esac
1835   fi
1836   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1837   # Build it unless LTO was explicitly disabled.
1838   case $target in
1839     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1840     *) ;;
1841   esac
1842 ])
1843
1844 AC_ARG_ENABLE(linker-plugin-configure-flags,
1845   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1846     [additional flags for configuring linker plugins @<:@none@:>@])],
1847   extra_linker_plugin_configure_flags=$enableval,
1848   extra_linker_plugin_configure_flags=)
1849 AC_SUBST(extra_linker_plugin_configure_flags)
1850 AC_ARG_ENABLE(linker-plugin-flags,
1851   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1852     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1853   extra_linker_plugin_flags=$enableval,
1854   extra_linker_plugin_flags=)
1855 AC_SUBST(extra_linker_plugin_flags)
1856
1857 # Enable --enable-host-shared.
1858 # Checked early to determine whether jit is an 'all' language
1859 AC_ARG_ENABLE(host-shared,
1860 [AS_HELP_STRING([--enable-host-shared],
1861                 [build host code as shared libraries])],
1862 [host_shared=$enableval
1863  case $target in
1864    x86_64-*-darwin* | aarch64-*-darwin*)
1865      if test x$host_shared != xyes ; then
1866        # PIC is the default, and actually cannot be switched off.
1867        echo configure.ac: warning: PIC code is required for the configured target, host-shared setting ignored. 1>&2
1868        host_shared=yes
1869      fi ;;
1870   *) ;;
1871  esac],
1872 [case $target in
1873   x86_64-*-darwin* | aarch64-*-darwin*) host_shared=yes ;;
1874   *) host_shared=no ;;
1875  esac])
1876 AC_SUBST(host_shared)
1877
1878 # By default, C and C++ are the only stage 1 languages.
1879 stage1_languages=,c,
1880
1881 # Target libraries that we bootstrap.
1882 bootstrap_target_libs=,target-libgcc,
1883
1884 # Figure out what language subdirectories are present.
1885 # Look if the user specified --enable-languages="..."; if not, use
1886 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1887 # go away some day.
1888 # NB:  embedded tabs in this IF block -- do not untabify
1889 if test -d ${srcdir}/gcc; then
1890   if test x"${enable_languages+set}" != xset; then
1891     if test x"${LANGUAGES+set}" = xset; then
1892       enable_languages="${LANGUAGES}"
1893         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1894     else
1895       enable_languages=default
1896     fi
1897   else
1898     if test x"${enable_languages}" = x ||
1899        test x"${enable_languages}" = xyes;
1900        then
1901       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1902       exit 1
1903     fi
1904   fi
1905   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1906
1907   # 'f95' is the old name for the 'fortran' language. We issue a warning
1908   # and make the substitution.
1909   case ,${enable_languages}, in
1910     *,f95,*)
1911       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1912       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1913       ;;
1914   esac
1915
1916   # If bootstrapping, C++ must be enabled.
1917   case ",$enable_languages,:$enable_bootstrap" in
1918     *,c++,*:*) ;;
1919     *:yes)
1920       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1921         enable_languages="${enable_languages},c++"
1922       else
1923         AC_MSG_ERROR([bootstrapping requires c++ sources])
1924       fi
1925       ;;
1926   esac
1927
1928   # First scan to see if an enabled language requires some other language.
1929   # We assume that a given config-lang.in will list all the language
1930   # front ends it requires, even if some are required indirectly.
1931   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1932     case ${lang_frag} in
1933       ..) ;;
1934       # The odd quoting in the next line works around
1935       # an apparent bug in bash 1.12 on linux.
1936       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1937       *)
1938         # From the config-lang.in, get $language, $lang_requires, and
1939         # $lang_requires_boot_languages.
1940         language=
1941         lang_requires=
1942         lang_requires_boot_languages=
1943         # set srcdir during sourcing lang_frag to the gcc dir.
1944         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
1945         # polutes this shell
1946         saved_srcdir=${srcdir}
1947         srcdir=${srcdir}/gcc . ${lang_frag}
1948         srcdir=${saved_srcdir}
1949         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1950           case ,${enable_languages}, in
1951             *,$other,*) ;;
1952             *,default,*) ;;
1953             *,all,*) ;;
1954             *,$language,*)
1955               echo " \`$other' language required by \`$language'; enabling" 1>&2
1956               enable_languages="${enable_languages},${other}"
1957               ;;
1958           esac
1959         done
1960         for other in ${lang_requires_boot_languages} ; do
1961           if test "$other" != "c"; then
1962             case ,${enable_stage1_languages}, in
1963               *,$other,*) ;;
1964               *,default,*) ;;
1965               *,all,*) ;;
1966               *)
1967                 case ,${enable_languages}, in
1968                   *,$language,*)
1969                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1970                     enable_stage1_languages="$enable_stage1_languages,${other}"
1971                     ;;
1972                 esac
1973                 ;;
1974             esac
1975           fi
1976         done
1977         ;;
1978     esac
1979   done
1980
1981   new_enable_languages=,c,
1982
1983   # If LTO is enabled, add the LTO front end.
1984   if test "$enable_lto" = "yes" ; then
1985     case ,${enable_languages}, in
1986       *,lto,*) ;;
1987       *) enable_languages="${enable_languages},lto" ;;
1988     esac
1989     if test "${build_lto_plugin}" = "yes" ; then
1990       configdirs="$configdirs lto-plugin"
1991     fi
1992   fi
1993
1994   # If we're building an offloading compiler, add the LTO front end.
1995   if test x"$enable_as_accelerator_for" != x ; then
1996     case ,${enable_languages}, in
1997       *,lto,*) ;;
1998       *) enable_languages="${enable_languages},lto" ;;
1999     esac
2000   fi
2001
2002   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
2003   potential_languages=,c,
2004
2005   enabled_target_libs=
2006   disabled_target_libs=
2007
2008   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2009     case ${lang_frag} in
2010       ..) ;;
2011       # The odd quoting in the next line works around
2012       # an apparent bug in bash 1.12 on linux.
2013       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2014       *)
2015         # From the config-lang.in, get $language, $target_libs,
2016         # $lang_dirs, $boot_language, and $build_by_default
2017         language=
2018         target_libs=
2019         lang_dirs=
2020         subdir_requires=
2021         boot_language=no
2022         build_by_default=yes
2023         # set srcdir during sourcing.  See above about save & restore
2024         saved_srcdir=${srcdir}
2025         srcdir=${srcdir}/gcc . ${lang_frag}
2026         srcdir=${saved_srcdir}
2027         if test x${language} = x; then
2028           echo "${lang_frag} doesn't set \$language." 1>&2
2029           exit 1
2030         fi
2031
2032         if test "$language" = "c++"; then
2033           boot_language=yes
2034         fi
2035
2036         add_this_lang=no
2037         # C is always enabled, so no need to add it again
2038         if test "$language" != "c"; then
2039           case ,${enable_languages}, in
2040             *,${language},*)
2041               # Language was explicitly selected; include it
2042               add_this_lang=yes
2043               ;;
2044             *,all,*)
2045               # All languages are enabled
2046               add_this_lang=all
2047               ;;
2048             *,default,*)
2049               # 'default' was selected, select it if it is a default language
2050               add_this_lang=${build_by_default}
2051               ;;
2052           esac
2053         fi
2054
2055         # Disable languages that need other directories if these aren't available.
2056         for i in $subdir_requires; do
2057           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2058           case ${add_this_lang} in
2059             yes)
2060               # Specifically requested language; tell them.
2061               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2062               ;;
2063             all)
2064               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2065               add_this_lang=unsupported
2066               ;;
2067             *)
2068               # Silently disable.
2069               add_this_lang=unsupported
2070               ;;
2071           esac
2072         done
2073
2074         # Disable Ada if no preexisting GNAT is available.
2075         case ${add_this_lang}:${language}:${have_gnat} in
2076           yes:ada:no)
2077             # Specifically requested language; tell them.
2078             AC_MSG_ERROR([GNAT is required to build $language])
2079             ;;
2080           all:ada:no)
2081             AC_MSG_WARN([GNAT is required to build $language])
2082             add_this_lang=unsupported
2083             ;;
2084           *:ada:no)
2085             # Silently disable.
2086             add_this_lang=unsupported
2087             ;;
2088         esac
2089
2090         # Disable jit if -enable-host-shared not specified
2091         # but not if building for Mingw. All code in Windows
2092         # is position independent code (PIC).
2093         case $target in
2094           *mingw*) ;;
2095           *)
2096           case ${add_this_lang}:${language}:${host_shared} in
2097             yes:jit:no)
2098                    # PR jit/64780: explicitly specify --enable-host-shared
2099             AC_MSG_ERROR([
2100 Enabling language "jit" requires --enable-host-shared.
2101
2102 --enable-host-shared typically slows the rest of the compiler down by
2103 a few %, so you must explicitly enable it.
2104
2105 If you want to build both the jit and the regular compiler, it is often
2106 best to do this via two separate configure/builds, in separate
2107 directories, to avoid imposing the performance cost of
2108 --enable-host-shared on the regular compiler.])
2109                     ;;
2110             all:jit:no)
2111               AC_MSG_WARN([--enable-host-shared required to build $language])
2112               add_this_lang=unsupported
2113               ;;
2114             *:jit:no)
2115               # Silently disable.
2116               add_this_lang=unsupported
2117               ;;
2118                 esac
2119           ;;
2120         esac
2121
2122         # Disable a language that is unsupported by the target.
2123         case "${add_this_lang}: $unsupported_languages " in
2124           no:*) ;;
2125           unsupported:*) ;;
2126           *:*" $language "*)
2127             AC_MSG_WARN([${language} not supported for this target])
2128             add_this_lang=unsupported
2129             ;;
2130         esac
2131
2132         case $add_this_lang in
2133           unsupported)
2134             # Remove language-dependent dirs.
2135             disabled_target_libs="$disabled_target_libs $target_libs"
2136             noconfigdirs="$noconfigdirs $lang_dirs"
2137             ;;
2138           no)
2139             # Remove language-dependent dirs; still show language as supported.
2140             disabled_target_libs="$disabled_target_libs $target_libs"
2141             noconfigdirs="$noconfigdirs $lang_dirs"
2142             potential_languages="${potential_languages}${language},"
2143             ;;
2144           all|yes)
2145             new_enable_languages="${new_enable_languages}${language},"
2146             potential_languages="${potential_languages}${language},"
2147             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2148             enabled_target_libs="$enabled_target_libs $target_libs"
2149             case "${boot_language}:,$enable_stage1_languages," in
2150               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2151                 # Add to (comma-separated) list of stage 1 languages.
2152                 case ",$stage1_languages," in
2153                   *,$language,* | ,yes, | ,all,) ;;
2154                   *) stage1_languages="${stage1_languages}${language}," ;;
2155                 esac
2156                 # We need to bootstrap any supporting libraries.
2157                 bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
2158                 ;;
2159             esac
2160             ;;
2161         esac
2162         ;;
2163     esac
2164   done
2165
2166   # Add target libraries which are only needed for disabled languages
2167   # to noconfigdirs.
2168   if test -n "$disabled_target_libs"; then
2169     for dir in $disabled_target_libs; do
2170       case " $enabled_target_libs " in
2171       *" ${dir} "*) ;;
2172       *) noconfigdirs="$noconfigdirs $dir" ;;
2173       esac
2174     done
2175   fi
2176
2177   AC_ARG_ENABLE(stage1-languages,
2178   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2179                   [choose additional languages to build during
2180                   stage1.  Mostly useful for compiler development])],
2181   [case ,${enable_stage1_languages}, in
2182     ,no,|,,)
2183       # Set it to something that will have no effect in the loop below
2184       enable_stage1_languages=c ;;
2185     ,yes,)
2186       enable_stage1_languages=`echo $new_enable_languages | \
2187         sed -e "s/^,//" -e "s/,$//" ` ;;
2188     *,all,*)
2189       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2190         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2191   esac
2192
2193   # Add "good" languages from enable_stage1_languages to stage1_languages,
2194   # while "bad" languages go in missing_languages.  Leave no duplicates.
2195   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2196     case $potential_languages in
2197       *,$i,*)
2198         case $stage1_languages in
2199           *,$i,*) ;;
2200           *) stage1_languages="$stage1_languages$i," ;;
2201         esac ;;
2202       *)
2203         case $missing_languages in
2204           *,$i,*) ;;
2205           *) missing_languages="$missing_languages$i," ;;
2206         esac ;;
2207      esac
2208   done])
2209
2210   # Remove leading/trailing commas that were added for simplicity
2211   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2212   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2213   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2214   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2215
2216   if test "x$missing_languages" != x; then
2217     AC_MSG_ERROR([
2218 The following requested languages could not be built: ${missing_languages}
2219 Supported languages are: ${potential_languages}])
2220   fi
2221   if test "x$new_enable_languages" != "x$enable_languages"; then
2222     echo The following languages will be built: ${new_enable_languages}
2223     enable_languages="$new_enable_languages"
2224   fi
2225
2226   AC_SUBST(stage1_languages)
2227   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2228 fi
2229
2230 # Handle --disable-<component> generically.
2231 for dir in $configdirs $build_configdirs $target_configdirs ; do
2232   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2233   varname=`echo $dirname | sed -e s/+/_/g`
2234   if eval test x\${enable_${varname}} "=" xno ; then
2235     noconfigdirs="$noconfigdirs $dir"
2236   fi
2237 done
2238
2239 # Check for Boehm's garbage collector
2240 AC_ARG_ENABLE(objc-gc,
2241 [AS_HELP_STRING([--enable-objc-gc],
2242                 [enable use of Boehm's garbage collector with the
2243                  GNU Objective-C runtime])])
2244 AC_ARG_WITH([target-bdw-gc],
2245 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2246                 [specify prefix directory for installed bdw-gc package.
2247                  Equivalent to --with-target-bdw-gc-include=PATH/include
2248                  plus --with-target-bdw-gc-lib=PATH/lib])])
2249 AC_ARG_WITH([target-bdw-gc-include],
2250 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2251                 [specify directories for installed bdw-gc include files])])
2252 AC_ARG_WITH([target-bdw-gc-lib],
2253 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2254                 [specify directories for installed bdw-gc library])])
2255
2256 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2257   AC_MSG_CHECKING([for bdw garbage collector])
2258   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2259     dnl no bdw-gw options, assume default locations
2260     AC_MSG_RESULT([using bdw-gc in default locations])
2261   else
2262     dnl bdw-gw options, first error checking, complete checking in libobjc
2263     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2264       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2265     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2266       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2267     else
2268       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2269     fi
2270   fi
2271 esac
2272
2273 # Disable libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2274 case ,${enable_languages}, in
2275   *,c++,*)
2276     # Disable libitm, libsanitizer if we're not building libstdc++
2277     case "${noconfigdirs}" in
2278       *target-libstdc++-v3*)
2279         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2280         ;;
2281       *) ;;
2282     esac
2283     ;;
2284   *)
2285     noconfigdirs="$noconfigdirs target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2286     ;;
2287 esac
2288
2289 # If gcc/ is not in the source tree then we'll not be building a
2290 # target compiler, assume in that case we don't want to build any
2291 # target libraries or tools.
2292 #
2293 # This was added primarily for the benefit for binutils-gdb who reuse
2294 # this configure script, but don't always have target tools available.
2295 if test ! -d ${srcdir}/gcc; then
2296    skipdirs="${skipdirs} ${target_configdirs}"
2297 fi
2298
2299 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2300 # $build_configdirs and $target_configdirs.
2301 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2302
2303 notsupp=""
2304 for dir in . $skipdirs $noconfigdirs ; do
2305   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2306   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2307     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2308     if test -r $srcdir/$dirname/configure ; then
2309       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2310         true
2311       else
2312         notsupp="$notsupp $dir"
2313       fi
2314     fi
2315   fi
2316   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2317     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2318     if test -r $srcdir/$dirname/configure ; then
2319       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2320         true
2321       else
2322         notsupp="$notsupp $dir"
2323       fi
2324     fi
2325   fi
2326   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2327     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2328     if test -r $srcdir/$dirname/configure ; then
2329       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2330         true
2331       else
2332         notsupp="$notsupp $dir"
2333       fi
2334     fi
2335   fi
2336 done
2337
2338 # Quietly strip out all directories which aren't configurable in this tree.
2339 # This relies on all configurable subdirectories being autoconfiscated, which
2340 # is now the case.
2341 build_configdirs_all="$build_configdirs"
2342 build_configdirs=
2343 for i in ${build_configdirs_all} ; do
2344   j=`echo $i | sed -e s/build-//g`
2345   if test -f ${srcdir}/$j/configure ; then
2346     build_configdirs="${build_configdirs} $i"
2347   fi
2348 done
2349
2350 configdirs_all="$configdirs"
2351 configdirs=
2352 for i in ${configdirs_all} ; do
2353   if test -f ${srcdir}/$i/configure ; then
2354     configdirs="${configdirs} $i"
2355   fi
2356 done
2357
2358 target_configdirs_all="$target_configdirs"
2359 target_configdirs=
2360 for i in ${target_configdirs_all} ; do
2361   j=`echo $i | sed -e s/target-//g`
2362   if test -f ${srcdir}/$j/configure ; then
2363     target_configdirs="${target_configdirs} $i"
2364   fi
2365 done
2366
2367 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2368 # so we have to add it after the preceding checks.
2369 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2370 then
2371   case " $configdirs " in
2372     *" libiberty "*)
2373       # If we can build libiberty, we can also build libiberty-linker-plugin.
2374       configdirs="$configdirs libiberty-linker-plugin"
2375       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2376         --with-libiberty=../libiberty-linker-plugin";;
2377     *)
2378       AC_MSG_ERROR([libiberty missing]);;
2379   esac
2380 fi
2381
2382 # Sometimes we have special requirements for the host libiberty.
2383 extra_host_libiberty_configure_flags=
2384 extra_host_zlib_configure_flags=
2385 case " $configdirs " in
2386   *" lto-plugin "* | *" libcc1 "*)
2387     # When these are to be built as shared libraries, the same applies to
2388     # libiberty.
2389     extra_host_libiberty_configure_flags=--enable-shared
2390     ;;
2391   *" bfd "*)
2392     # When bfd is to be built as a shared library, the same applies to
2393     # zlib.
2394     if test "$enable_shared" = "yes"; then
2395       extra_host_zlib_configure_flags=--enable-host-shared
2396     fi
2397     ;;
2398 esac
2399 AC_SUBST(extra_host_libiberty_configure_flags)
2400 AC_SUBST(extra_host_zlib_configure_flags)
2401
2402 # Produce a warning message for the subdirs we can't configure.
2403 # This isn't especially interesting in the Cygnus tree, but in the individual
2404 # FSF releases, it's important to let people know when their machine isn't
2405 # supported by the one or two programs in a package.
2406
2407 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2408   # If $appdirs is non-empty, at least one of those directories must still
2409   # be configured, or we error out.  (E.g., if the gas release supports a
2410   # specified target in some subdirs but not the gas subdir, we shouldn't
2411   # pretend that all is well.)
2412   if test -n "$appdirs" ; then
2413     for dir in $appdirs ; do
2414       if test -r $dir/Makefile.in ; then
2415         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2416           appdirs=""
2417           break
2418         fi
2419         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2420           appdirs=""
2421           break
2422         fi
2423       fi
2424     done
2425     if test -n "$appdirs" ; then
2426       echo "*** This configuration is not supported by this package." 1>&2
2427       exit 1
2428     fi
2429   fi
2430   # Okay, some application will build, or we don't care to check.  Still
2431   # notify of subdirs not getting built.
2432   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2433   echo "    ${notsupp}" 1>&2
2434   echo "    (Any other directories should still work fine.)" 1>&2
2435 fi
2436
2437 case "$host" in
2438   *msdosdjgpp*)
2439     enable_gdbtk=no ;;
2440 esac
2441
2442 # To find our prefix, in gcc_cv_tool_prefix.
2443 ACX_TOOL_DIRS
2444
2445 copy_dirs=
2446
2447 AC_ARG_WITH([build-sysroot],
2448   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2449                   [use sysroot as the system root during the build])],
2450   [if test x"$withval" != x ; then
2451      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2452    fi],
2453   [SYSROOT_CFLAGS_FOR_TARGET=])
2454 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2455
2456 AC_ARG_WITH([debug-prefix-map],
2457   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2458                   [map A to B, C to D ... in debug information])],
2459   [if test x"$withval" != x; then
2460      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2461      for debug_map in $withval; do
2462        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2463      done
2464    fi],
2465   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2466 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2467
2468 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2469 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2470 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2471 # We want to ensure that TARGET libraries (which we know are built with
2472 # gcc) are built with "-O2 -g", so include those options when setting
2473 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2474 if test "x$CFLAGS_FOR_TARGET" = x; then
2475   if test "x${is_cross_compiler}" = xyes; then
2476     CFLAGS_FOR_TARGET="-g -O2"
2477   else
2478     CFLAGS_FOR_TARGET=$CFLAGS
2479     case " $CFLAGS " in
2480       *" -O2 "*) ;;
2481       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2482     esac
2483     case " $CFLAGS " in
2484       *" -g "* | *" -g3 "*) ;;
2485       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2486     esac
2487   fi
2488 fi
2489 AC_SUBST(CFLAGS_FOR_TARGET)
2490
2491 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2492   if test "x${is_cross_compiler}" = xyes; then
2493     CXXFLAGS_FOR_TARGET="-g -O2"
2494   else
2495     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2496     case " $CXXFLAGS " in
2497       *" -O2 "*) ;;
2498       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2499     esac
2500     case " $CXXFLAGS " in
2501       *" -g "* | *" -g3 "*) ;;
2502       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2503     esac
2504   fi
2505 fi
2506 AC_SUBST(CXXFLAGS_FOR_TARGET)
2507
2508 AC_SUBST(LDFLAGS_FOR_TARGET)
2509
2510 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2511 # the named directory are copied to $(tooldir)/sys-include.
2512 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2513   if test x${is_cross_compiler} = xno ; then
2514     echo 1>&2 '***' --with-headers is only supported when cross compiling
2515     exit 1
2516   fi
2517   if test x"${with_headers}" != xyes ; then
2518     x=${gcc_cv_tool_prefix}
2519     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2520   fi
2521 fi
2522
2523 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2524 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2525 # are permitted.
2526 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2527   if test x${is_cross_compiler} = xno ; then
2528     echo 1>&2 '***' --with-libs is only supported when cross compiling
2529     exit 1
2530   fi
2531   if test x"${with_libs}" != xyes ; then
2532     # Copy the libraries in reverse order, so that files in the first named
2533     # library override files in subsequent libraries.
2534     x=${gcc_cv_tool_prefix}
2535     for l in ${with_libs}; do
2536       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2537     done
2538   fi
2539 fi
2540
2541 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2542 #
2543 # This is done by determining whether or not the appropriate directory
2544 # is available, and by checking whether or not specific configurations
2545 # have requested that this magic not happen.
2546 #
2547 # The command line options always override the explicit settings in
2548 # configure.ac, and the settings in configure.ac override this magic.
2549 #
2550 # If the default for a toolchain is to use GNU as and ld, and you don't
2551 # want to do that, then you should use the --without-gnu-as and
2552 # --without-gnu-ld options for the configure script.  Similarly, if
2553 # the default is to use the included zlib and you don't want to do that,
2554 # you should use the --with-system-zlib option for the configure script.
2555
2556 if test x${use_gnu_as} = x &&
2557    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2558   with_gnu_as=yes
2559   extra_host_args="$extra_host_args --with-gnu-as"
2560 fi
2561
2562 if test x${use_gnu_ld} = x &&
2563    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2564   with_gnu_ld=yes
2565   extra_host_args="$extra_host_args --with-gnu-ld"
2566 fi
2567
2568 if test x${use_included_zlib} = x &&
2569    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2570   :
2571 else
2572   with_system_zlib=yes
2573   extra_host_args="$extra_host_args --with-system-zlib"
2574 fi
2575
2576 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2577 # can detect this case.
2578
2579 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2580   with_newlib=yes
2581   extra_host_args="$extra_host_args --with-newlib"
2582 fi
2583
2584 # Handle ${copy_dirs}
2585 set fnord ${copy_dirs}
2586 shift
2587 while test $# != 0 ; do
2588   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2589     :
2590   else
2591     echo Copying $1 to $2
2592
2593     # Use the install script to create the directory and all required
2594     # parent directories.
2595     if test -d $2 ; then
2596       :
2597     else
2598       echo >config.temp
2599       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2600     fi
2601
2602     # Copy the directory, assuming we have tar.
2603     # FIXME: Should we use B in the second tar?  Not all systems support it.
2604     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2605
2606     # It is the responsibility of the user to correctly adjust all
2607     # symlinks.  If somebody can figure out how to handle them correctly
2608     # here, feel free to add the code.
2609
2610     echo $1 > $2/COPIED
2611   fi
2612   shift; shift
2613 done
2614
2615 # Determine a target-dependent exec_prefix that the installed
2616 # gcc will search in.  Keep this list sorted by triplet, with
2617 # the *-*-osname triplets last.
2618 md_exec_prefix=
2619 case "${target}" in
2620   i[[34567]]86-pc-msdosdjgpp*)
2621     md_exec_prefix=/dev/env/DJDIR/bin
2622     ;;
2623   *-*-hpux* | \
2624   *-*-nto-qnx* | \
2625   *-*-solaris2*)
2626     md_exec_prefix=/usr/ccs/bin
2627     ;;
2628 esac
2629
2630 extra_arflags_for_target=
2631 extra_nmflags_for_target=
2632 extra_ranlibflags_for_target=
2633 target_makefile_frag=/dev/null
2634 case "${target}" in
2635   spu-*-*)
2636     target_makefile_frag="config/mt-spu"
2637     ;;
2638   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2639     target_makefile_frag="config/mt-sde"
2640     ;;
2641   mipsisa*-*-elfoabi*)
2642     target_makefile_frag="config/mt-mips-elfoabi"
2643     ;;
2644   mips*-*-*linux* | mips*-*-gnu*)
2645     target_makefile_frag="config/mt-mips-gnu"
2646     ;;
2647   nios2-*-elf*)
2648     target_makefile_frag="config/mt-nios2-elf"
2649     ;;
2650   *-*-linux-android*)
2651     target_makefile_frag="config/mt-android"
2652     ;;
2653   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2654     target_makefile_frag="config/mt-gnu"
2655     ;;
2656   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2657     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2658     # commands to handle both 32-bit and 64-bit objects.  These flags are
2659     # harmless if we're using GNU nm or ar.
2660     extra_arflags_for_target=" -X32_64"
2661     extra_nmflags_for_target=" -B -X32_64"
2662     ;;
2663 esac
2664
2665 alphaieee_frag=/dev/null
2666 case $target in
2667   alpha*-*-*)
2668     # This just makes sure to use the -mieee option to build target libs.
2669     # This should probably be set individually by each library.
2670     alphaieee_frag="config/mt-alphaieee"
2671     ;;
2672 esac
2673
2674 # If --enable-target-optspace always use -Os instead of -O2 to build
2675 # the target libraries, similarly if it is not specified, use -Os
2676 # on selected platforms.
2677 ospace_frag=/dev/null
2678 case "${enable_target_optspace}:${target}" in
2679   yes:*)
2680     ospace_frag="config/mt-ospace"
2681     ;;
2682   :d30v-*)
2683     ospace_frag="config/mt-d30v"
2684     ;;
2685   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2686     ospace_frag="config/mt-ospace"
2687     ;;
2688   no:* | :*)
2689     ;;
2690   *)
2691     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2692     ;;
2693 esac
2694
2695 # Some systems (e.g., one of the i386-aix systems the gas testers are
2696 # using) don't handle "\$" correctly, so don't use it here.
2697 tooldir='${exec_prefix}'/${target_noncanonical}
2698 build_tooldir=${tooldir}
2699
2700 # Create a .gdbinit file which runs the one in srcdir
2701 # and tells GDB to look there for source files.
2702
2703 if test -r ${srcdir}/.gdbinit ; then
2704   case ${srcdir} in
2705     .) ;;
2706     *) cat > ./.gdbinit <<EOF
2707 # ${NO_EDIT}
2708 dir ${srcdir}
2709 dir .
2710 source ${srcdir}/.gdbinit
2711 EOF
2712     ;;
2713   esac
2714 fi
2715
2716 # Make sure that the compiler is able to generate an executable.  If it
2717 # can't, we are probably in trouble.  We don't care whether we can run the
2718 # executable--we might be using a cross compiler--we only care whether it
2719 # can be created.  At this point the main configure script has set CC.
2720 we_are_ok=no
2721 echo "int main () { return 0; }" > conftest.c
2722 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2723 if test $? = 0 ; then
2724   if test -s conftest || test -s conftest.exe ; then
2725     we_are_ok=yes
2726   fi
2727 fi
2728 case $we_are_ok in
2729   no)
2730     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2731     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2732     rm -f conftest*
2733     exit 1
2734     ;;
2735 esac
2736 rm -f conftest*
2737
2738 # Decide which environment variable is used to find dynamic libraries.
2739 case "${host}" in
2740   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2741   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2742   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2743   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2744 esac
2745
2746 # On systems where the dynamic library environment variable is PATH,
2747 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2748 # built executables to PATH.
2749 if test "$RPATH_ENVVAR" = PATH; then
2750   GCC_SHLIB_SUBDIR=/shlib
2751 else
2752   GCC_SHLIB_SUBDIR=
2753 fi
2754
2755 # Adjust the toplevel makefile according to whether bootstrap was selected.
2756 case $enable_bootstrap in
2757   yes)
2758     bootstrap_suffix=bootstrap
2759     BUILD_CONFIG=bootstrap-debug
2760     ;;
2761   no)
2762     bootstrap_suffix=no-bootstrap
2763     BUILD_CONFIG=
2764     ;;
2765 esac
2766
2767 AC_MSG_CHECKING(for default BUILD_CONFIG)
2768
2769 AC_ARG_WITH([build-config],
2770   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2771                   [use config/NAME.mk build configuration])],
2772   [case $with_build_config in
2773    yes) with_build_config= ;;
2774    no) with_build_config= BUILD_CONFIG= ;;
2775    esac])
2776
2777 if test "x${with_build_config}" != x; then
2778   BUILD_CONFIG=$with_build_config
2779 else
2780   case $BUILD_CONFIG in
2781   bootstrap-debug)
2782     if echo "int f (void) { return 0; }" > conftest.c &&
2783        ${CC} -c conftest.c &&
2784        mv conftest.o conftest.o.g0 &&
2785        ${CC} -c -g conftest.c &&
2786        mv conftest.o conftest.o.g &&
2787        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2788       :
2789     else
2790       BUILD_CONFIG=
2791     fi
2792     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2793     ;;
2794   esac
2795 fi
2796 AC_MSG_RESULT($BUILD_CONFIG)
2797 AC_SUBST(BUILD_CONFIG)
2798
2799 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2800 AC_MSG_CHECKING([for --enable-vtable-verify])
2801 AC_ARG_ENABLE(vtable-verify,
2802 [AS_HELP_STRING([--enable-vtable-verify],
2803                 [Enable vtable verification feature])],
2804 [case "$enableval" in
2805  yes) enable_vtable_verify=yes ;;
2806  no)  enable_vtable_verify=no ;;
2807  *)   enable_vtable_verify=no;;
2808  esac],
2809 [enable_vtable_verify=no])
2810 AC_MSG_RESULT($enable_vtable_verify)
2811
2812 # Record target_configdirs and the configure arguments for target and
2813 # build configuration in Makefile.
2814 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2815 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2816 bootstrap_fixincludes=no
2817
2818 # If we are building libgomp, bootstrap it.
2819 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2820   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2821 fi
2822
2823 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2824 # or bootstrap-ubsan, bootstrap it.
2825 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2826   case "$BUILD_CONFIG" in
2827     *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
2828       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2829       bootstrap_fixincludes=yes
2830       ;;
2831   esac
2832 fi
2833
2834 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2835 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2836    test "$enable_vtable_verify" != no; then
2837   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2838 fi
2839
2840 # Determine whether gdb needs tk/tcl or not.
2841 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2842 # and in that case we want gdb to be built without tk.  Ugh!
2843 # In fact I believe gdb is the *only* package directly dependent on tk,
2844 # so we should be able to put the 'maybe's in unconditionally and
2845 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2846 # 100% sure that that's safe though.
2847
2848 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2849 case "$enable_gdbtk" in
2850   no)
2851     GDB_TK="" ;;
2852   yes)
2853     GDB_TK="${gdb_tk}" ;;
2854   *)
2855     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2856     # distro.  Eventually someone will fix this and move Insight, nee
2857     # gdbtk to a separate directory.
2858     if test -d ${srcdir}/gdb/gdbtk ; then
2859       GDB_TK="${gdb_tk}"
2860     else
2861       GDB_TK=""
2862     fi
2863     ;;
2864 esac
2865 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2866 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2867
2868 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
2869 # else does, only include them if one of these is built.  The Makefile
2870 # provides the ordering, so it's enough here to add to the list.
2871 case " ${configdirs} " in
2872   *\ gdb\ *)
2873     configdirs="${configdirs} gnulib gdbsupport"
2874     ;;
2875   *\ gdbserver\ *)
2876     configdirs="${configdirs} gnulib gdbsupport"
2877     ;;
2878   *\ sim\ *)
2879     configdirs="${configdirs} gnulib"
2880     ;;
2881 esac
2882
2883 # Strip out unwanted targets.
2884
2885 # While at that, we remove Makefiles if we were started for recursive
2886 # configuration, so that the top-level Makefile reconfigures them,
2887 # like we used to do when configure itself was recursive.
2888
2889 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2890 # but now we're fixing up the Makefile ourselves with the additional
2891 # commands passed to AC_CONFIG_FILES.  Use separate variables
2892 # extrasub-{build,host,target} not because there is any reason to split
2893 # the substitutions up that way, but only to remain below the limit of
2894 # 99 commands in a script, for HP-UX sed.
2895
2896 # Do not nest @if/@endif or @unless/@endunless pairs, because
2897 # configure will not warn you at all.
2898
2899 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2900   yes:yes:*\ gold\ *:*,c++,*) ;;
2901   yes:yes:*\ gold\ *:*)
2902     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2903     ;;
2904 esac
2905
2906 extrasub_build=
2907 for module in ${build_configdirs} ; do
2908   if test -z "${no_recursion}" \
2909      && test -f ${build_subdir}/${module}/Makefile; then
2910     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2911     rm -f ${build_subdir}/${module}/Makefile
2912   fi
2913   extrasub_build="$extrasub_build
2914 /^@if build-$module\$/d
2915 /^@endif build-$module\$/d
2916 /^@unless build-$module\$/,/^@endunless build-$module\$/d
2917 /^@if build-$module-$bootstrap_suffix\$/d
2918 /^@endif build-$module-$bootstrap_suffix\$/d
2919 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
2920 done
2921 extrasub_host=
2922 for module in ${configdirs} ; do
2923   if test -z "${no_recursion}"; then
2924     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2925       if test -f ${file}; then
2926         echo 1>&2 "*** removing ${file} to force reconfigure"
2927         rm -f ${file}
2928       fi
2929     done
2930   fi
2931   case ${module},${bootstrap_fixincludes} in
2932     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2933     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2934   esac
2935   extrasub_host="$extrasub_host
2936 /^@if $module\$/d
2937 /^@endif $module\$/d
2938 /^@unless $module\$/,/^@endunless $module\$/d
2939 /^@if $module-$host_bootstrap_suffix\$/d
2940 /^@endif $module-$host_bootstrap_suffix\$/d
2941 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
2942 done
2943 extrasub_target=
2944 for module in ${target_configdirs} ; do
2945   if test -z "${no_recursion}" \
2946      && test -f ${target_subdir}/${module}/Makefile; then
2947     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2948     rm -f ${target_subdir}/${module}/Makefile
2949   fi
2950
2951   # We only bootstrap target libraries listed in bootstrap_target_libs.
2952   case $bootstrap_target_libs in
2953     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2954     *) target_bootstrap_suffix=no-bootstrap ;;
2955   esac
2956
2957   extrasub_target="$extrasub_target
2958 /^@if target-$module\$/d
2959 /^@endif target-$module\$/d
2960 /^@unless target-$module\$/,/^@endunless target-$module\$/d
2961 /^@if target-$module-$target_bootstrap_suffix\$/d
2962 /^@endif target-$module-$target_bootstrap_suffix\$/d
2963 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
2964 done
2965
2966 # Do the final fixup along with target modules.
2967 extrasub_target="$extrasub_target
2968 /^@if /,/^@endif /d
2969 /^@unless /d
2970 /^@endunless /d"
2971
2972 # Create the serialization dependencies.  This uses a temporary file.
2973
2974 AC_ARG_ENABLE([serial-configure],
2975 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
2976                 [force sequential configuration of
2977                  sub-packages for the host, target or build
2978                  machine, or all sub-packages])])
2979
2980 case ${enable_serial_configure} in
2981   yes)
2982     enable_serial_build_configure=yes
2983     enable_serial_host_configure=yes
2984     enable_serial_target_configure=yes
2985     ;;
2986 esac
2987
2988 # These force 'configure's to be done one at a time, to avoid problems
2989 # with contention over a shared config.cache.
2990 rm -f serdep.tmp
2991 echo '# serdep.tmp' > serdep.tmp
2992 olditem=
2993 test "x${enable_serial_build_configure}" = xyes &&
2994 for item in ${build_configdirs} ; do
2995   case ${olditem} in
2996     "") ;;
2997     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
2998   esac
2999   olditem=${item}
3000 done
3001 olditem=
3002 test "x${enable_serial_host_configure}" = xyes &&
3003 for item in ${configdirs} ; do
3004   case ${olditem} in
3005     "") ;;
3006     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
3007   esac
3008   olditem=${item}
3009 done
3010 olditem=
3011 test "x${enable_serial_target_configure}" = xyes &&
3012 for item in ${target_configdirs} ; do
3013   case ${olditem} in
3014     "") ;;
3015     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
3016   esac
3017   olditem=${item}
3018 done
3019 serialization_dependencies=serdep.tmp
3020 AC_SUBST_FILE(serialization_dependencies)
3021
3022 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
3023 # target, nonopt, and variable assignments.  These are the ones we
3024 # might not want to pass down to subconfigures.  The exception being
3025 # --cache-file=/dev/null, which is used to turn off the use of cache
3026 # files altogether, and which should be passed on to subconfigures.
3027 # Also strip program-prefix, program-suffix, and program-transform-name,
3028 # so that we can pass down a consistent program-transform-name.
3029 baseargs=
3030 tbaseargs=
3031 keep_next=no
3032 skip_next=no
3033 eval "set -- $ac_configure_args"
3034 for ac_arg
3035 do
3036   if test X"$skip_next" = X"yes"; then
3037     skip_next=no
3038     continue
3039   fi
3040   if test X"$keep_next" = X"yes"; then
3041     case $ac_arg in
3042       *\'*)
3043         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3044     esac
3045     baseargs="$baseargs '$ac_arg'"
3046     tbaseargs="$tbaseargs '$ac_arg'"
3047     keep_next=no
3048     continue
3049   fi
3050
3051   # Handle separated arguments.  Based on the logic generated by
3052   # autoconf 2.59.
3053   case $ac_arg in
3054     *=* | --config-cache | -C | -disable-* | --disable-* \
3055       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3056       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3057       | -with-* | --with-* | -without-* | --without-* | --x)
3058       separate_arg=no
3059       ;;
3060     -*)
3061       separate_arg=yes
3062       ;;
3063     *)
3064       separate_arg=no
3065       ;;
3066   esac
3067
3068   skip_targ=no
3069   case $ac_arg in
3070 changequote(,)
3071   --with-* | --without-*)
3072     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3073
3074     case $libopt in
3075     *[-_]include)
3076       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3077       ;;
3078     *[-_]lib)
3079       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3080       ;;
3081     *)
3082       lib=$libopt
3083       ;;
3084     esac
3085 changequote([,])
3086
3087     case $lib in
3088     mpc | mpfr | gmp | isl)
3089       # If we're processing --with-$lib, --with-$lib-include or
3090       # --with-$lib-lib, for one of the libs above, and target is
3091       # different from host, don't pass the current argument to any
3092       # target library's configure.
3093       if test x$is_cross_compiler = xyes; then
3094         skip_targ=yes
3095       fi
3096       ;;
3097     esac
3098     ;;
3099   esac
3100
3101   case "$ac_arg" in
3102     --cache-file=/dev/null | \
3103     -cache-file=/dev/null )
3104       # Handled here to avoid the test to skip args below.
3105       baseargs="$baseargs '$ac_arg'"
3106       tbaseargs="$tbaseargs '$ac_arg'"
3107       # Assert: $separate_arg should always be no.
3108       keep_next=$separate_arg
3109       ;;
3110     --no*)
3111       continue
3112       ;;
3113     --c* | \
3114     --sr* | \
3115     --ho* | \
3116     --bu* | \
3117     --t* | \
3118     --program-* | \
3119     -cache_file* | \
3120     -srcdir* | \
3121     -host* | \
3122     -build* | \
3123     -target* | \
3124     -program-prefix* | \
3125     -program-suffix* | \
3126     -program-transform-name* )
3127       skip_next=$separate_arg
3128       continue
3129       ;;
3130     -*)
3131       # An option.  Add it.
3132       case $ac_arg in
3133         *\'*)
3134           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3135       esac
3136       baseargs="$baseargs '$ac_arg'"
3137       if test X"$skip_targ" = Xno; then
3138         tbaseargs="$tbaseargs '$ac_arg'"
3139       fi
3140       keep_next=$separate_arg
3141       ;;
3142     *)
3143       # Either a variable assignment, or a nonopt (triplet).  Don't
3144       # pass it down; let the Makefile handle this.
3145       continue
3146       ;;
3147   esac
3148 done
3149 # Remove the initial space we just introduced and, as these will be
3150 # expanded by make, quote '$'.
3151 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3152
3153 # Add in --program-transform-name, after --program-prefix and
3154 # --program-suffix have been applied to it.  Autoconf has already
3155 # doubled dollar signs and backslashes in program_transform_name; we want
3156 # the backslashes un-doubled, and then the entire thing wrapped in single
3157 # quotes, because this will be expanded first by make and then by the shell.
3158 # Also, because we want to override the logic in subdir configure scripts to
3159 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3160 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3161 ${program_transform_name}
3162 EOF_SED
3163 gcc_transform_name=`cat conftestsed.out`
3164 rm -f conftestsed.out
3165 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3166 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3167 if test "$silent" = yes; then
3168   baseargs="$baseargs --silent"
3169   tbaseargs="$tbaseargs --silent"
3170 fi
3171 baseargs="$baseargs --disable-option-checking"
3172 tbaseargs="$tbaseargs --disable-option-checking"
3173
3174 # Record and document user additions to sub configure arguments.
3175 AC_ARG_VAR([build_configargs],
3176            [additional configure arguments for build directories])
3177 AC_ARG_VAR([host_configargs],
3178            [additional configure arguments for host directories])
3179 AC_ARG_VAR([target_configargs],
3180            [additional configure arguments for target directories])
3181
3182 # For the build-side libraries, we just need to pretend we're native,
3183 # and not use the same cache file.  Multilibs are neither needed nor
3184 # desired.  We can't even use the same cache file for all build-side
3185 # libraries, as they're compiled differently; some with C, some with
3186 # C++ or with different feature-enabling options.
3187 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3188
3189 # For host modules, accept cache file option, or specification as blank.
3190 case "${cache_file}" in
3191 "") # empty
3192   cache_file_option="" ;;
3193 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3194   cache_file_option="--cache-file=${cache_file}" ;;
3195 *) # relative path
3196   cache_file_option="--cache-file=../${cache_file}" ;;
3197 esac
3198
3199 # Host dirs don't like to share a cache file either, horribly enough.
3200 # This seems to be due to autoconf 2.5x stupidity.
3201 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3202
3203 target_configargs="$target_configargs ${tbaseargs}"
3204
3205 # Passing a --with-cross-host argument lets the target libraries know
3206 # whether they are being built with a cross-compiler or being built
3207 # native.  However, it would be better to use other mechanisms to make the
3208 # sorts of decisions they want to make on this basis.  Please consider
3209 # this option to be deprecated.  FIXME.
3210 if test x${is_cross_compiler} = xyes ; then
3211   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3212 fi
3213
3214 # Special user-friendly check for native x86_64-linux build, if
3215 # multilib is not explicitly enabled.
3216 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3217   x86_64-*linux*:yes:$build:$build:)
3218     # Make sure we have a development environment that handles 32-bit
3219     dev64=no
3220     echo "int main () { return 0; }" > conftest.c
3221     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3222     if test $? = 0 ; then
3223       if test -s conftest || test -s conftest.exe ; then
3224         dev64=yes
3225       fi
3226     fi
3227     rm -f conftest*
3228     if test x${dev64} != xyes ; then
3229       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.])
3230     fi
3231     ;;
3232 esac
3233
3234 # Default to --enable-multilib.
3235 if test x${enable_multilib} = x ; then
3236   target_configargs="--enable-multilib ${target_configargs}"
3237 fi
3238
3239 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3240 # changed from the earlier setting of with_newlib.
3241 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3242   target_configargs="--with-newlib ${target_configargs}"
3243 fi
3244
3245 # Different target subdirs use different values of certain variables
3246 # (notably CXX).  Worse, multilibs use *lots* of different values.
3247 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3248 # it doesn't automatically accept command-line overrides of them.
3249 # This means it's not safe for target subdirs to share a cache file,
3250 # which is disgusting, but there you have it.  Hopefully this can be
3251 # fixed in future.  It's still worthwhile to use a cache file for each
3252 # directory.  I think.
3253
3254 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3255 # We need to pass --target, as newer autoconf's requires consistency
3256 # for target_alias and gcc doesn't manage it consistently.
3257 target_configargs="--cache-file=./config.cache ${target_configargs}"
3258
3259 FLAGS_FOR_TARGET=
3260 case " $target_configdirs " in
3261  *" newlib "*)
3262   case " $target_configargs " in
3263   *" --with-newlib "*)
3264    case "$target" in
3265     *-cygwin*)
3266       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3267       ;;
3268    esac
3269
3270    # If we're not building GCC, don't discard standard headers.
3271    if test -d ${srcdir}/gcc; then
3272      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3273
3274      if test "${build}" != "${host}"; then
3275        # On Canadian crosses, CC_FOR_TARGET will have already been set
3276        # by `configure', so we won't have an opportunity to add -Bgcc/
3277        # to it.  This is right: we don't want to search that directory
3278        # for binaries, but we want the header files in there, so add
3279        # them explicitly.
3280        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3281
3282        # Someone might think of using the pre-installed headers on
3283        # Canadian crosses, in case the installed compiler is not fully
3284        # compatible with the compiler being built.  In this case, it
3285        # would be better to flag an error than risking having
3286        # incompatible object files being constructed.  We can't
3287        # guarantee that an error will be flagged, but let's hope the
3288        # compiler will do it, when presented with incompatible header
3289        # files.
3290      fi
3291    fi
3292
3293    case "${target}-${is_cross_compiler}" in
3294    i[[3456789]]86-*-linux*-no)
3295       # Here host == target, so we don't need to build gcc,
3296       # so we don't want to discard standard headers.
3297       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3298       ;;
3299    *)
3300       # If we're building newlib, use its generic headers last, but search
3301       # for any libc-related directories first (so make it the last -B
3302       # switch).
3303       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3304
3305       # If we're building libgloss, find the startup file, simulator library
3306       # and linker script.
3307       case " $target_configdirs " in
3308         *" libgloss "*)
3309         # Look for startup file, simulator library and maybe linker script.
3310         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3311         # Look for libnosys.a in case the target needs it.
3312         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3313         # Most targets have the linker script in the source directory.
3314         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3315         ;;
3316       esac
3317       ;;
3318    esac
3319    ;;
3320   esac
3321   ;;
3322 esac
3323
3324 case "$target" in
3325   x86_64-*mingw* | *-w64-mingw*)
3326   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3327   # however, use a symlink named 'mingw' in ${prefix} .
3328     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3329     ;;
3330   *-mingw*)
3331   # MinGW can't be handled as Cygwin above since it does not use newlib.
3332     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3333     ;;
3334 esac
3335
3336 # Allow the user to override the flags for
3337 # our build compiler if desired.
3338 if test x"${build}" = x"${host}" ; then
3339   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3340   CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
3341   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3342   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3343 fi
3344
3345 # On Canadian crosses, we'll be searching the right directories for
3346 # the previously-installed cross compiler, so don't bother to add
3347 # flags for directories within the install tree of the compiler
3348 # being built; programs in there won't even run.
3349 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3350   # Search for pre-installed headers if nothing else fits.
3351   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3352 fi
3353
3354 if test "x${use_gnu_ld}" = x &&
3355    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3356   # Arrange for us to find uninstalled linker scripts.
3357   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3358 fi
3359
3360 # Search for other target-specific linker scripts and such.
3361 case "${target}" in
3362   mep*)
3363     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3364     ;;
3365 esac
3366
3367 # Makefile fragments.
3368 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3369 do
3370   eval fragval=\$$frag
3371   if test $fragval != /dev/null; then
3372     eval $frag=${srcdir}/$fragval
3373   fi
3374 done
3375 AC_SUBST_FILE(host_makefile_frag)
3376 AC_SUBST_FILE(target_makefile_frag)
3377 AC_SUBST_FILE(alphaieee_frag)
3378 AC_SUBST_FILE(ospace_frag)
3379
3380 # Miscellanea: directories, flags, etc.
3381 AC_SUBST(RPATH_ENVVAR)
3382 AC_SUBST(GCC_SHLIB_SUBDIR)
3383 AC_SUBST(tooldir)
3384 AC_SUBST(build_tooldir)
3385 AC_SUBST(CONFIGURE_GDB_TK)
3386 AC_SUBST(GDB_TK)
3387 AC_SUBST(INSTALL_GDB_TK)
3388
3389 # Build module lists & subconfigure args.
3390 AC_SUBST(build_configargs)
3391 AC_SUBST(build_configdirs)
3392
3393 # Host module lists & subconfigure args.
3394 AC_SUBST(host_configargs)
3395 AC_SUBST(configdirs)
3396 AC_SUBST(target_configdirs)
3397
3398 # Target module lists & subconfigure args.
3399 AC_SUBST(target_configargs)
3400
3401
3402 # Build tools.
3403 AC_SUBST(AR_FOR_BUILD)
3404 AC_SUBST(AS_FOR_BUILD)
3405 AC_SUBST(CC_FOR_BUILD)
3406 AC_SUBST(CFLAGS_FOR_BUILD)
3407 AC_SUBST(CPP_FOR_BUILD)
3408 AC_SUBST(CPPFLAGS_FOR_BUILD)
3409 AC_SUBST(CXXFLAGS_FOR_BUILD)
3410 AC_SUBST(CXX_FOR_BUILD)
3411 AC_SUBST(DLLTOOL_FOR_BUILD)
3412 AC_SUBST(DSYMUTIL_FOR_BUILD)
3413 AC_SUBST(GFORTRAN_FOR_BUILD)
3414 AC_SUBST(GOC_FOR_BUILD)
3415 AC_SUBST(GDC_FOR_BUILD)
3416 AC_SUBST(LDFLAGS_FOR_BUILD)
3417 AC_SUBST(LD_FOR_BUILD)
3418 AC_SUBST(NM_FOR_BUILD)
3419 AC_SUBST(RANLIB_FOR_BUILD)
3420 AC_SUBST(WINDMC_FOR_BUILD)
3421 AC_SUBST(WINDRES_FOR_BUILD)
3422
3423 # Generate default definitions for YACC, M4, LEX and other programs that run
3424 # on the build machine.  These are used if the Makefile can't locate these
3425 # programs in objdir.
3426 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3427
3428 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3429 case " $build_configdirs " in
3430   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3431 esac
3432
3433 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3434 case " $build_configdirs " in
3435   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3436 esac
3437
3438 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3439 case " $build_configdirs " in
3440   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3441 esac
3442
3443 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3444 case " $build_configdirs " in
3445   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3446   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3447 esac
3448
3449 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3450 case " $build_configdirs " in
3451   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3452 esac
3453
3454 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3455 case " $build_configdirs " in
3456   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3457   *)
3458 changequote(,)
3459     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3460     # higher, else we use the "missing" dummy.
3461     if ${MAKEINFO} --version \
3462        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3463       :
3464     else
3465       MAKEINFO="$MISSING makeinfo"
3466     fi
3467     ;;
3468 changequote([,])
3469 esac
3470
3471 # FIXME: expect and dejagnu may become build tools?
3472
3473 AC_CHECK_PROGS(EXPECT, expect, expect)
3474 case " $configdirs " in
3475   *" expect "*)
3476     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3477     ;;
3478 esac
3479
3480 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3481 case " $configdirs " in
3482   *" dejagnu "*)
3483     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3484     ;;
3485 esac
3486
3487
3488 # Host tools.
3489 NCN_STRICT_CHECK_TOOLS(AR, ar)
3490 NCN_STRICT_CHECK_TOOLS(AS, as)
3491 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3492 NCN_STRICT_CHECK_TOOLS(DSYMUTIL, dsymutil)
3493 NCN_STRICT_CHECK_TOOLS(LD, ld)
3494 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3495 NCN_STRICT_CHECK_TOOLS(NM, nm)
3496 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3497 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3498 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3499 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3500 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3501 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3502 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3503 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3504 AC_SUBST(CC)
3505 AC_SUBST(CXX)
3506 AC_SUBST(CFLAGS)
3507 AC_SUBST(CXXFLAGS)
3508
3509 # Target tools.
3510 AC_ARG_WITH([build-time-tools],
3511   [AS_HELP_STRING([--with-build-time-tools=PATH],
3512                   [use given path to find target tools during the build])],
3513   [case x"$withval" in
3514      x/*) ;;
3515      *)
3516        with_build_time_tools=
3517        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3518        ;;
3519    esac],
3520   [with_build_time_tools=])
3521
3522 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3523 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3524 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3525 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3526 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3527 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3528
3529 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3530 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3531 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3532 ACX_CHECK_INSTALLED_TARGET_TOOL(DSYMUTIL_FOR_TARGET, dsymutil)
3533 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3534 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3535 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3536 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3537 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3538 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3539 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3540 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3541 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3542 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3543 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3544
3545 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3546
3547 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3548 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3549 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3550 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3551 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3552                 [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],
3553                 c++)
3554 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3555                 [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],
3556                 c++)
3557 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3558 GCC_TARGET_TOOL(dsymutil, DSYMUTIL_FOR_TARGET, DSYMUTIL)
3559 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3560 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3561                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3562 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3563                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3564 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3565                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3566 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3567 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3568 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3569 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3570 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3571 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3572 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3573 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3574 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3575 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3576 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3577
3578 AC_SUBST(FLAGS_FOR_TARGET)
3579 AC_SUBST(RAW_CXX_FOR_TARGET)
3580
3581 # Certain tools may need extra flags.
3582 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3583 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3584 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3585
3586 # When building target libraries, except in a Canadian cross, we use
3587 # the same toolchain as the compiler we just built.
3588 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3589 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3590 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3591 if test $host = $build; then
3592   case " $configdirs " in
3593     *" gcc "*)
3594       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3595       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3596       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3597       ;;
3598   esac
3599 fi
3600
3601 AC_SUBST(COMPILER_AS_FOR_TARGET)
3602 AC_SUBST(COMPILER_LD_FOR_TARGET)
3603 AC_SUBST(COMPILER_NM_FOR_TARGET)
3604
3605 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3606 AC_ARG_ENABLE(maintainer-mode,
3607 [AS_HELP_STRING([--enable-maintainer-mode],
3608                 [enable make rules and dependencies not useful
3609                  (and sometimes confusing) to the casual installer])],
3610       USE_MAINTAINER_MODE=$enableval,
3611       USE_MAINTAINER_MODE=no)
3612 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3613 AC_SUBST(MAINTAINER_MODE_TRUE)
3614 AC_SUBST(MAINTAINER_MODE_FALSE)
3615 if test "$USE_MAINTAINER_MODE" = yes; then
3616   MAINTAINER_MODE_TRUE=
3617   MAINTAINER_MODE_FALSE='#'
3618 else
3619   MAINTAINER_MODE_TRUE='#'
3620   MAINTAINER_MODE_FALSE=
3621 fi
3622 MAINT=$MAINTAINER_MODE_TRUE
3623 AC_SUBST(MAINT)dnl
3624
3625 # ---------------------
3626 # GCC bootstrap support
3627 # ---------------------
3628
3629 # Stage specific cflags for build.
3630 stage1_cflags="-g"
3631 case $build in
3632   vax-*-*)
3633     case ${GCC} in
3634       yes) stage1_cflags="-g -Wa,-J" ;;
3635       *) stage1_cflags="-g -J" ;;
3636     esac ;;
3637 esac
3638
3639 AC_SUBST(stage1_cflags)
3640
3641 # Enable --enable-checking in stage1 of the compiler.
3642 AC_ARG_ENABLE(stage1-checking,
3643 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3644                 [choose additional checking for stage1 of the compiler])],
3645 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3646 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3647   # For --disable-checking or implicit --enable-checking=release, avoid
3648   # setting --enable-checking=gc in the default stage1 checking for LTO
3649   # bootstraps.  See PR62077.
3650   case $BUILD_CONFIG in
3651     *lto*)
3652       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3653     *)
3654       stage1_checking=--enable-checking=yes,types;;
3655   esac
3656   if test "x$enable_checking" = x && \
3657      test -d ${srcdir}/gcc && \
3658      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3659     stage1_checking=--enable-checking=yes,types,extra
3660   fi
3661 else
3662   stage1_checking=--enable-checking=$enable_checking,types
3663 fi])
3664 AC_SUBST(stage1_checking)
3665
3666 # Enable -Werror in bootstrap stage2 and later.
3667 AC_ARG_ENABLE(werror,
3668 [AS_HELP_STRING([--enable-werror],
3669                 [enable -Werror in bootstrap stage2 and later])],
3670 [
3671 case ${enable_werror} in
3672   yes) stage2_werror_flag="--enable-werror-always" ;;
3673   *) stage2_werror_flag="" ;;
3674 esac
3675 ],
3676 [
3677 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3678   case $BUILD_CONFIG in
3679   bootstrap-debug)
3680       stage2_werror_flag="--enable-werror-always" ;;
3681   "")
3682       stage2_werror_flag="--enable-werror-always" ;;
3683   esac
3684 fi
3685 ])
3686
3687 AC_SUBST(stage2_werror_flag)
3688
3689 # Specify what files to not compare during bootstrap.
3690
3691 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3692 case "$target" in
3693   hppa*64*-*-hpux*) ;;
3694   hppa*-*-hpux*) compare_exclusions="$compare_exclusions | */libgcc/lib2funcs* | gcc/function-tests.o" ;;
3695   powerpc*-ibm-aix*) compare_exclusions="$compare_exclusions | *libgomp*\$(objext)" ;;
3696 esac
3697 AC_SUBST(compare_exclusions)
3698
3699 AC_CONFIG_FILES([Makefile],
3700   [sed "$extrasub_build" Makefile |
3701    sed "$extrasub_host" |
3702    sed "$extrasub_target" > mf$$
3703    mv -f mf$$ Makefile],
3704   [extrasub_build="$extrasub_build"
3705    extrasub_host="$extrasub_host"
3706    extrasub_target="$extrasub_target"])
3707 AC_OUTPUT