configure.ac

   1 #   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2 #   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012,
   3 #   2014, 2015, 2016 Free Software Foundation, Inc.
   4 #
   5 # This file is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  18
  19 ##############################################################################
  20 ### WARNING: this file contains embedded tabs.  Do not run untabify on this file.
  21
  22 m4_include(config/acx.m4)
  23 m4_include(config/override.m4)
  24 m4_include(config/proginstall.m4)
  25 m4_include(config/elf.m4)
  26 m4_include([libtool.m4])
  27 m4_include([ltoptions.m4])
  28 m4_include([ltsugar.m4])
  29 m4_include([ltversion.m4])
  30 m4_include([lt~obsolete.m4])
  31 m4_include([config/isl.m4])
  32
  33 AC_INIT(move-if-change)
  34 AC_DISABLE_OPTION_CHECKING
  35
  36 progname=$0
  37 # if PWD already has a value, it is probably wrong.
  38 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  39
  40 # Export original configure arguments for use by sub-configures.
  41 # Quote arguments with shell meta charatcers.
  42 TOPLEVEL_CONFIGURE_ARGUMENTS=
  43 set -- "$progname" "$@"
  44 for ac_arg
  45 do
  46   case "$ac_arg" in
  47   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  48     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  49     # if the argument is of the form -foo=baz, quote the baz part only
  50     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  51   *) ;;
  52   esac
  53   # Add the quoted argument to the list.
  54   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  55 done
  56 if test "$silent" = yes; then
  57   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  58 fi
  59 # Remove the initial space we just introduced and, as these will be
  60 # expanded by make, quote '$'.
  61 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  62 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  63
  64 # Find the build, host, and target systems.
  65 ACX_NONCANONICAL_BUILD
  66 ACX_NONCANONICAL_HOST
  67 ACX_NONCANONICAL_TARGET
  68
  69 dnl Autoconf 2.5x and later will set a default program prefix if
  70 dnl --target was used, even if it was the same as --host.  Disable
  71 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  72 dnl to take effect.
  73 test "$host_noncanonical" = "$target_noncanonical" &&
  74   test "$program_prefix$program_suffix$program_transform_name" = \
  75     NONENONEs,x,x, &&
  76   program_transform_name=s,y,y,
  77
  78 AC_CANONICAL_SYSTEM
  79 AC_ARG_PROGRAM
  80
  81 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  82 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  83
  84 # Get 'install' or 'install-sh' and its variants.
  85 AC_PROG_INSTALL
  86 ACX_PROG_LN
  87 AC_PROG_LN_S
  88 AC_PROG_SED
  89 AC_PROG_AWK
  90
  91 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  92
  93 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  94 # a relative path.
  95 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  96   INSTALL="${srcpwd}/install-sh -c"
  97 fi
  98
  99 # Set srcdir to "." if that's what it is.
 100 # This is important for multilib support.
 101 pwd=`${PWDCMD-pwd}`
 102 if test "${pwd}" = "${srcpwd}" ; then
 103   srcdir=.
 104 fi
 105
 106 topsrcdir=$srcpwd
 107
 108 extra_host_args=
 109
 110 ### To add a new directory to the tree, first choose whether it is a target
 111 ### or a host dependent tool.  Then put it into the appropriate list
 112 ### (library or tools, host or target), doing a dependency sort.
 113
 114 # Subdirs will be configured in the order listed in build_configdirs,
 115 # configdirs, or target_configdirs; see the serialization section below.
 116
 117 # Dependency sorting is only needed when *configuration* must be done in
 118 # a particular order.  In all cases a dependency should be specified in
 119 # the Makefile, whether or not it's implicitly specified here.
 120
 121 # Double entries in build_configdirs, configdirs, or target_configdirs may
 122 # cause circular dependencies and break everything horribly.
 123
 124 # these library is used by various programs built for the build
 125 # environment
 126 #
 127 build_libs="build-libiberty build-libcpp"
 128
 129 # these tools are built for the build environment
 130 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 131
 132 # these libraries are used by various programs built for the host environment
 133 #f
 134 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libdecnumber gmp mpfr mpc isl libelf libiconv"
 135
 136 # these tools are built for the host environment
 137 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 138 # know that we are building the simulator.
 139 # binutils, gas and ld appear in that order because it makes sense to run
 140 # "make check" in that particular order.
 141 # If --enable-gold is used, "gold" may replace "ld".
 142 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools"
 143
 144 # these libraries are built for the target environment, and are built after
 145 # the host libraries and the host tools (which may be a cross compiler)
 146 # Note that libiberty is not a target library.
 147 target_libraries="target-libgcc \
 148                 target-libbacktrace \
 149                 target-libgloss \
 150                 target-newlib \
 151                 target-libgomp \
 152                 target-liboffloadmic \
 153                 target-libhsail-rt \
 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 # Handle --enable-gold, --enable-ld.
 303 # --disable-gold [--enable-ld]
 304 #     Build only ld.  Default option.
 305 # --enable-gold [--enable-ld]
 306 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 307 #     as "ld.bfd" and "ld".
 308 # --enable-gold=default [--enable-ld]
 309 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 310 #     install ld as "ld.bfd".
 311 # --enable-gold[=default] --disable-ld
 312 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 313 # --enable-gold --enable-ld=default
 314 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 315 #     and ld.bfd).
 316 #     In other words, ld is default
 317 # --enable-gold=default --enable-ld=default
 318 #     Error.
 319
 320 default_ld=
 321 AC_ARG_ENABLE(gold,
 322 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 323                 [build gold @<:@ARG={default,yes,no}@:>@])],
 324 ENABLE_GOLD=$enableval,
 325 ENABLE_GOLD=no)
 326 case "${ENABLE_GOLD}" in
 327   yes|default)
 328     # Check for ELF target.
 329     is_elf=no
 330     case "${target}" in
 331       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 332       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 333       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 334       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 335         case "${target}" in
 336           *-*-linux*aout* | *-*-linux*oldld*)
 337             ;;
 338           *)
 339             is_elf=yes
 340             ;;
 341         esac
 342     esac
 343
 344     if test "$is_elf" = "yes"; then
 345       # Check for target supported by gold.
 346       case "${target}" in
 347         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 348         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-*)
 349           configdirs="$configdirs gold"
 350           if test x${ENABLE_GOLD} = xdefault; then
 351             default_ld=gold
 352           fi
 353           ENABLE_GOLD=yes
 354           ;;
 355       esac
 356     fi
 357     ;;
 358   no)
 359     ;;
 360   *)
 361     AC_MSG_ERROR([invalid --enable-gold argument])
 362     ;;
 363 esac
 364
 365 AC_ARG_ENABLE(ld,
 366 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 367                 [build ld @<:@ARG={default,yes,no}@:>@])],
 368 ENABLE_LD=$enableval,
 369 ENABLE_LD=yes)
 370
 371 case "${ENABLE_LD}" in
 372   default)
 373     if test x${default_ld} != x; then
 374       AC_MSG_ERROR([either gold or ld can be the default ld])
 375     fi
 376     ;;
 377   yes)
 378     ;;
 379   no)
 380     if test x${ENABLE_GOLD} != xyes; then
 381       AC_MSG_WARN([neither ld nor gold are enabled])
 382     fi
 383     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 384     ;;
 385   *)
 386     AC_MSG_ERROR([invalid --enable-ld argument])
 387     ;;
 388 esac
 389
 390 # PR gas/19109
 391 # Decide the default method for compressing debug sections.
 392 # Provide a configure time option to override our default.
 393 AC_ARG_ENABLE(compressed_debug_sections,
 394 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 395                 [Enable compressed debug sections for gas, gold or ld by
 396                  default])],
 397 [
 398   if test x"$enable_compressed_debug_sections" = xyes; then
 399     AC_MSG_ERROR([no program with compressed debug sections specified])
 400   fi
 401 ], [enable_compressed_debug_sections=])
 402
 403 # Configure extra directories which are host specific
 404
 405 case "${host}" in
 406   *-cygwin*)
 407     configdirs="$configdirs libtermcap" ;;
 408 esac
 409
 410 # A target can indicate whether a language isn't supported for some reason.
 411 # Only spaces may be used in this macro; not newlines or tabs.
 412 unsupported_languages=
 413
 414 # Remove more programs from consideration, based on the host or
 415 # target this usually means that a port of the program doesn't
 416 # exist yet.
 417
 418 case "${host}" in
 419   i[[3456789]]86-*-msdosdjgpp*)
 420     noconfigdirs="$noconfigdirs tcl tk itcl"
 421     ;;
 422 esac
 423
 424
 425 AC_ARG_ENABLE(libquadmath,
 426 AS_HELP_STRING([--disable-libquadmath],
 427   [do not build libquadmath directory]),
 428 ENABLE_LIBQUADMATH=$enableval,
 429 ENABLE_LIBQUADMATH=yes)
 430 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 431   noconfigdirs="$noconfigdirs target-libquadmath"
 432 fi
 433
 434
 435 AC_ARG_ENABLE(libquadmath-support,
 436 AS_HELP_STRING([--disable-libquadmath-support],
 437   [disable libquadmath support for Fortran]),
 438 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 439 ENABLE_LIBQUADMATH_SUPPORT=yes)
 440 enable_libquadmath_support=
 441 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 442   enable_libquadmath_support=no
 443 fi
 444
 445
 446 AC_ARG_ENABLE(libada,
 447 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 448 ENABLE_LIBADA=$enableval,
 449 ENABLE_LIBADA=yes)
 450 if test "${ENABLE_LIBADA}" != "yes" ; then
 451   noconfigdirs="$noconfigdirs gnattools"
 452 fi
 453
 454 AC_ARG_ENABLE(libssp,
 455 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 456 ENABLE_LIBSSP=$enableval,
 457 ENABLE_LIBSSP=yes)
 458
 459 AC_ARG_ENABLE(libstdcxx,
 460 AS_HELP_STRING([--disable-libstdcxx],
 461   [do not build libstdc++-v3 directory]),
 462 ENABLE_LIBSTDCXX=$enableval,
 463 ENABLE_LIBSTDCXX=default)
 464 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 465   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 466 fi]
 467
 468 # If this is accelerator compiler and its target is intelmic we enable
 469 # target liboffloadmic by default.  If this is compiler with offloading
 470 # for intelmic we enable host liboffloadmic by default.  Otherwise
 471 # liboffloadmic is disabled by default.
 472 AC_ARG_ENABLE([liboffloadmic],
 473 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 474                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 475 [case "$enableval" in
 476   no | host | target)
 477     enable_liboffloadmic=$enableval ;;
 478   *)
 479     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 480 esac],
 481 [if test x"$enable_as_accelerator_for" != x; then
 482   case "${target}" in
 483     *-intelmic-* | *-intelmicemul-*)
 484       enable_liboffloadmic=target
 485       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 486       ;;
 487     *)
 488       enable_liboffloadmic=no
 489       ;;
 490   esac
 491 else
 492   case "${enable_offload_targets}" in
 493     *-intelmic-* | *-intelmicemul-*)
 494       enable_liboffloadmic=host
 495       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 496       ;;
 497     *)
 498       enable_liboffloadmic=no
 499       ;;
 500     esac
 501 fi])
 502 AC_SUBST(extra_liboffloadmic_configure_flags)
 503
 504 # Enable libgomp by default on hosted POSIX systems, and a few others.
 505 if test x$enable_libgomp = x ; then
 506     case "${target}" in
 507     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 508         ;;
 509     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 510         ;;
 511     *-*-solaris2* | *-*-hpux11*)
 512         ;;
 513     *-*-darwin* | *-*-aix*)
 514         ;;
 515     nvptx*-*-*)
 516         ;;
 517     *)
 518         noconfigdirs="$noconfigdirs target-libgomp"
 519         ;;
 520     esac
 521 fi
 522
 523 # Disable libatomic on unsupported systems.
 524 if test -d ${srcdir}/libatomic; then
 525     if test x$enable_libatomic = x; then
 526         AC_MSG_CHECKING([for libatomic support])
 527         if (srcdir=${srcdir}/libatomic; \
 528                 . ${srcdir}/configure.tgt; \
 529                 test -n "$UNSUPPORTED")
 530         then
 531             AC_MSG_RESULT([no])
 532             noconfigdirs="$noconfigdirs target-libatomic"
 533         else
 534             AC_MSG_RESULT([yes])
 535         fi
 536     fi
 537 fi
 538
 539 # Disable liboffloadmic on unsupported systems.
 540 if test -d ${srcdir}/liboffloadmic; then
 541     if test x$enable_liboffloadmic != xno; then
 542         AC_MSG_CHECKING([for liboffloadmic support])
 543         if (srcdir=${srcdir}/liboffloadmic; \
 544                 . ${srcdir}/configure.tgt; \
 545                 test -n "$UNSUPPORTED")
 546         then
 547             AC_MSG_RESULT([no])
 548             noconfigdirs="$noconfigdirs target-liboffloadmic"
 549         else
 550             AC_MSG_RESULT([yes])
 551         fi
 552     fi
 553 fi
 554
 555 # Disable libitm on unsupported systems.
 556 if test -d ${srcdir}/libitm; then
 557     if test x$enable_libitm = x; then
 558         AC_MSG_CHECKING([for libitm support])
 559         if (srcdir=${srcdir}/libitm; \
 560                 . ${srcdir}/configure.tgt; \
 561                 test -n "$UNSUPPORTED")
 562         then
 563             AC_MSG_RESULT([no])
 564             noconfigdirs="$noconfigdirs target-libitm"
 565         else
 566             AC_MSG_RESULT([yes])
 567         fi
 568     fi
 569 fi
 570
 571 # Disable libsanitizer on unsupported systems.
 572 if test -d ${srcdir}/libsanitizer; then
 573     if test x$enable_libsanitizer = x; then
 574         AC_MSG_CHECKING([for libsanitizer support])
 575         if (srcdir=${srcdir}/libsanitizer; \
 576                 . ${srcdir}/configure.tgt; \
 577                 test -n "$UNSUPPORTED")
 578         then
 579             AC_MSG_RESULT([no])
 580             noconfigdirs="$noconfigdirs target-libsanitizer"
 581         else
 582             AC_MSG_RESULT([yes])
 583         fi
 584     fi
 585 fi
 586
 587 # Disable libvtv on unsupported systems.
 588 if test -d ${srcdir}/libvtv; then
 589     if test x$enable_libvtv = x; then
 590         AC_MSG_CHECKING([for libvtv support])
 591         if (srcdir=${srcdir}/libvtv; \
 592                 . ${srcdir}/configure.tgt; \
 593                 test "$VTV_SUPPORTED" != "yes")
 594         then
 595             AC_MSG_RESULT([no])
 596             noconfigdirs="$noconfigdirs target-libvtv"
 597         else
 598             AC_MSG_RESULT([yes])
 599         fi
 600     fi
 601 fi
 602
 603
 604 # Disable libhsail-rt on unsupported systems.
 605 if test -d ${srcdir}/libhsail-rt; then
 606     if test x$enable_libhsail_rt = x; then
 607         AC_MSG_CHECKING([for libhsail-rt support])
 608         if (srcdir=${srcdir}/libhsail-rt; \
 609                 . ${srcdir}/configure.tgt; \
 610                 test -n "$UNSUPPORTED")
 611         then
 612             AC_MSG_RESULT([no])
 613             unsupported_languages="$unsupported_languages brig"
 614             # This implicitly disables also target-libhsail-rt as it won't
 615             # get added to the build without BRIG FE.
 616         else
 617             AC_MSG_RESULT([yes])
 618         fi
 619     fi
 620 fi
 621
 622
 623 # Disable libquadmath for some systems.
 624 case "${target}" in
 625   avr-*-*)
 626     noconfigdirs="$noconfigdirs target-libquadmath"
 627     ;;
 628   # libquadmath is unused on AIX and libquadmath build process use of
 629   # LD_LIBRARY_PATH can break AIX bootstrap.
 630   powerpc-*-aix* | rs6000-*-aix*)
 631     noconfigdirs="$noconfigdirs target-libquadmath"
 632     ;;
 633 esac
 634
 635 # Disable libssp for some systems.
 636 case "${target}" in
 637   avr-*-*)
 638     # No hosted I/O support.
 639     noconfigdirs="$noconfigdirs target-libssp"
 640     ;;
 641   powerpc-*-aix* | rs6000-*-aix*)
 642     noconfigdirs="$noconfigdirs target-libssp"
 643     ;;
 644   rl78-*-*)
 645     # libssp uses a misaligned load to trigger a fault, but the RL78
 646     # doesn't fault for those - instead, it gives a build-time error
 647     # for explicit misaligned loads.
 648     noconfigdirs="$noconfigdirs target-libssp"
 649     ;;
 650   visium-*-*)
 651     # No hosted I/O support.
 652     noconfigdirs="$noconfigdirs target-libssp"
 653     ;;
 654 esac
 655
 656 # Disable libstdc++-v3 for some systems.
 657 # Allow user to override this if they pass --enable-libstdc++-v3
 658 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 659   case "${target}" in
 660     *-*-vxworks*)
 661       # VxWorks uses the Dinkumware C++ library.
 662       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 663       ;;
 664     arm*-wince-pe*)
 665       # the C++ libraries don't build on top of CE's C libraries
 666       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 667       ;;
 668     avr-*-*)
 669       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 670       ;;
 671     ft32-*-*)
 672       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 673       ;;
 674   esac
 675 fi
 676
 677 # Disable D on systems where it is known to not work.
 678 # For testing, you can override this with --enable-languages=d.
 679 case ,${enable_languages}, in
 680   *,d,*)
 681     ;;
 682   *)
 683     case "${target}" in
 684       *-*-darwin*)
 685         unsupported_languages="$unsupported_languages d"
 686         ;;
 687     esac
 688     ;;
 689 esac
 690
 691 # Disable libphobos on unsupported systems.
 692 # For testing, you can override this with --enable-libphobos.
 693 if test -d ${srcdir}/libphobos; then
 694     if test x$enable_libphobos = x; then
 695         AC_MSG_CHECKING([for libphobos support])
 696         if (srcdir=${srcdir}/libphobos; \
 697                 . ${srcdir}/configure.tgt; \
 698                 test "$LIBPHOBOS_SUPPORTED" != "yes")
 699         then
 700             AC_MSG_RESULT([no])
 701             noconfigdirs="$noconfigdirs target-libphobos"
 702         else
 703             AC_MSG_RESULT([yes])
 704         fi
 705     fi
 706 fi
 707
 708 # Disable Fortran for some systems.
 709 case "${target}" in
 710   mmix-*-*)
 711     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 712     unsupported_languages="$unsupported_languages fortran"
 713     ;;
 714 esac
 715
 716 # Disable libffi for some systems.
 717 case "${target}" in
 718   powerpc-*-darwin*)
 719     ;;
 720   i[[3456789]]86-*-darwin*)
 721     ;;
 722   x86_64-*-darwin[[912]]*)
 723     ;;
 724   *-*-darwin*)
 725     noconfigdirs="$noconfigdirs target-libffi"
 726     ;;
 727   *-*-netware*)
 728     noconfigdirs="$noconfigdirs target-libffi"
 729     ;;
 730   *-*-phoenix*)
 731     noconfigdirs="$noconfigdirs target-libffi"
 732     ;;
 733   *-*-rtems*)
 734     noconfigdirs="$noconfigdirs target-libffi"
 735     ;;
 736   *-*-tpf*)
 737     noconfigdirs="$noconfigdirs target-libffi"
 738     ;;
 739   *-*-uclinux*)
 740     noconfigdirs="$noconfigdirs target-libffi"
 741     ;;
 742   *-*-vxworks*)
 743     noconfigdirs="$noconfigdirs target-libffi"
 744     ;;
 745   aarch64*-*-freebsd*)
 746     noconfigdirs="$noconfigdirs target-libffi"
 747     ;;
 748   alpha*-*-*vms*)
 749     noconfigdirs="$noconfigdirs target-libffi"
 750     ;;
 751   arm*-*-freebsd*)
 752     noconfigdirs="$noconfigdirs target-libffi"
 753     ;;
 754   arm-wince-pe)
 755     noconfigdirs="$noconfigdirs target-libffi"
 756     ;;
 757   arm*-*-symbianelf*)
 758     noconfigdirs="$noconfigdirs target-libffi"
 759     ;;
 760   cris-*-* | crisv32-*-*)
 761     case "${target}" in
 762       *-*-linux*)
 763         ;;
 764       *) # See PR46792 regarding target-libffi.
 765         noconfigdirs="$noconfigdirs target-libffi";;
 766     esac
 767     ;;
 768   hppa*64*-*-hpux*)
 769     noconfigdirs="$noconfigdirs target-libffi"
 770     ;;
 771   hppa*-hp-hpux11*)
 772     ;;
 773   hppa*-*-hpux*)
 774     noconfigdirs="$noconfigdirs target-libffi"
 775     ;;
 776   ia64*-*-*vms*)
 777     noconfigdirs="$noconfigdirs target-libffi"
 778     ;;
 779   i[[3456789]]86-w64-mingw*)
 780     noconfigdirs="$noconfigdirs target-libffi"
 781     ;;
 782   i[[3456789]]86-*-mingw*)
 783     noconfigdirs="$noconfigdirs target-libffi"
 784     ;;
 785   x86_64-*-mingw*)
 786     noconfigdirs="$noconfigdirs target-libffi"
 787     ;;
 788   mmix-*-*)
 789     noconfigdirs="$noconfigdirs target-libffi"
 790     ;;
 791   powerpc-*-aix*)
 792     ;;
 793   rs6000-*-aix*)
 794     ;;
 795   ft32-*-*)
 796     noconfigdirs="$noconfigdirs target-libffi"
 797     ;;
 798   *-*-lynxos*)
 799     noconfigdirs="$noconfigdirs target-libffi"
 800     ;;
 801 esac
 802
 803 # Disable the go frontend on systems where it is known to not work. Please keep
 804 # this in sync with contrib/config-list.mk.
 805 case "${target}" in
 806 *-*-darwin* | *-*-cygwin* | *-*-mingw*)
 807     unsupported_languages="$unsupported_languages go"
 808     ;;
 809 esac
 810
 811 # Disable libgo for some systems where it is known to not work.
 812 # For testing, you can easily override this with --enable-libgo.
 813 if test x$enable_libgo = x; then
 814     case "${target}" in
 815     *-*-darwin*)
 816         # PR 46986
 817         noconfigdirs="$noconfigdirs target-libgo"
 818         ;;
 819     *-*-cygwin* | *-*-mingw*)
 820         noconfigdirs="$noconfigdirs target-libgo"
 821         ;;
 822     esac
 823 fi
 824
 825 # Default libgloss CPU subdirectory.
 826 libgloss_dir="$target_cpu"
 827
 828 case "${target}" in
 829   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 830     libgloss_dir=wince
 831     ;;
 832   aarch64*-*-* )
 833     libgloss_dir=aarch64
 834     ;;
 835   arm*-*-*)
 836     libgloss_dir=arm
 837     ;;
 838   cris-*-* | crisv32-*-*)
 839     libgloss_dir=cris
 840     ;;
 841   hppa*-*-*)
 842     libgloss_dir=pa
 843     ;;
 844   i[[3456789]]86-*-*)
 845     libgloss_dir=i386
 846     ;;
 847   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 848     libgloss_dir=m68hc11
 849     ;;
 850   m68*-*-* | fido-*-*)
 851     libgloss_dir=m68k
 852     ;;
 853   mips*-*-*)
 854     libgloss_dir=mips
 855     ;;
 856   powerpc*-*-*)
 857     libgloss_dir=rs6000
 858     ;;
 859   sparc*-*-*)
 860     libgloss_dir=sparc
 861     ;;
 862 esac
 863
 864 # Disable newlib and libgloss for various target OSes.
 865 case "${target}" in
 866   alpha*-dec-osf*)
 867     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 868     ;;
 869   i[[3456789]]86-*-linux*)
 870     # This section makes it possible to build newlib natively on linux.
 871     # If we are using a cross compiler then don't configure newlib.
 872     if test x${is_cross_compiler} != xno ; then
 873       noconfigdirs="$noconfigdirs target-newlib"
 874     fi
 875     noconfigdirs="$noconfigdirs target-libgloss"
 876     # If we are not using a cross compiler, do configure newlib.
 877     # Note however, that newlib will only be configured in this situation
 878     # if the --with-newlib option has been given, because otherwise
 879     # 'target-newlib' will appear in skipdirs.
 880     ;;
 881   i[[3456789]]86-*-rdos*)
 882     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 883     ;;
 884   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 885     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 886     ;;
 887   sparc-*-sunos4*)
 888     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 889     ;;
 890   *-*-aix*)
 891     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 892     ;;
 893   *-*-beos*)
 894     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 895     ;;
 896   *-*-chorusos)
 897     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 898     ;;
 899   *-*-dragonfly*)
 900     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 901     ;;
 902   *-*-freebsd*)
 903     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 904     ;;
 905   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 906     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 907     ;;
 908   *-*-lynxos*)
 909     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 910     ;;
 911   *-*-mingw*)
 912     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 913     ;;
 914   *-*-netbsd*)
 915     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 916     ;;
 917   *-*-netware*)
 918     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 919     ;;
 920   *-*-tpf*)
 921     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 922     ;;
 923   *-*-uclinux*)
 924     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 925     ;;
 926   *-*-vxworks*)
 927     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 928     ;;
 929 esac
 930
 931 case "${target}" in
 932   *-*-chorusos)
 933     ;;
 934   aarch64-*-darwin*)
 935     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 936     noconfigdirs="$noconfigdirs sim target-rda"
 937     ;;
 938   amdgcn*-*-*)
 939     ;;
 940   arm-*-darwin*)
 941     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 942     noconfigdirs="$noconfigdirs sim target-rda"
 943     ;;
 944   powerpc-*-darwin*)
 945     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 946     noconfigdirs="$noconfigdirs sim target-rda"
 947     ;;
 948   i[[3456789]]86-*-darwin*)
 949     noconfigdirs="$noconfigdirs ld gprof"
 950     noconfigdirs="$noconfigdirs sim target-rda"
 951     ;;
 952   x86_64-*-darwin[[912]]*)
 953     noconfigdirs="$noconfigdirs ld gas gprof"
 954     noconfigdirs="$noconfigdirs sim target-rda"
 955     ;;
 956   *-*-darwin*)
 957     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 958     noconfigdirs="$noconfigdirs sim target-rda"
 959     ;;
 960   *-*-dragonfly*)
 961     ;;
 962   *-*-freebsd*)
 963     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
 964         && test -f /usr/local/include/gmp.h; then
 965       with_gmp=/usr/local
 966     fi
 967     ;;
 968   *-*-kaos*)
 969     # Remove unsupported stuff on all kaOS configurations.
 970     noconfigdirs="$noconfigdirs target-libgloss"
 971     ;;
 972   *-*-netbsd*)
 973     ;;
 974   *-*-netware*)
 975     ;;
 976   *-*-phoenix*)
 977     noconfigdirs="$noconfigdirs target-libgloss"
 978     ;;
 979   *-*-rtems*)
 980     noconfigdirs="$noconfigdirs target-libgloss"
 981     ;;
 982     # The tpf target doesn't support gdb yet.
 983   *-*-tpf*)
 984     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
 985     ;;
 986   *-*-uclinux*)
 987     noconfigdirs="$noconfigdirs target-rda"
 988     ;;
 989   *-*-vxworks*)
 990     ;;
 991   alpha*-dec-osf*)
 992     # ld works, but does not support shared libraries.
 993     # gas doesn't generate exception information.
 994     noconfigdirs="$noconfigdirs gas ld"
 995     ;;
 996   alpha*-*-*vms*)
 997     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
 998     ;;
 999   alpha*-*-*)
1000     # newlib is not 64 bit ready
1001     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1002     ;;
1003   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1004     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1005     ;;
1006   arc*-*-*)
1007     noconfigdirs="$noconfigdirs sim"
1008     ;;
1009   arm-*-pe*)
1010     noconfigdirs="$noconfigdirs target-libgloss"
1011     ;;
1012   arm-*-riscix*)
1013     noconfigdirs="$noconfigdirs ld target-libgloss"
1014     ;;
1015   avr-*-*)
1016     if test x${with_avrlibc} != xno; then
1017       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1018     fi
1019     ;;
1020   c4x-*-* | tic4x-*-*)
1021     noconfigdirs="$noconfigdirs target-libgloss"
1022     ;;
1023   tic54x-*-*)
1024     noconfigdirs="$noconfigdirs target-libgloss gdb"
1025     ;;
1026   d10v-*-*)
1027     noconfigdirs="$noconfigdirs target-libgloss"
1028     ;;
1029   d30v-*-*)
1030     noconfigdirs="$noconfigdirs gdb"
1031     ;;
1032   fr30-*-elf*)
1033     noconfigdirs="$noconfigdirs gdb"
1034     ;;
1035   ft32-*-*)
1036     noconfigdirs="$noconfigdirs target-rda gprof"
1037     ;;
1038   moxie-*-*)
1039     noconfigdirs="$noconfigdirs"
1040     ;;
1041   h8300*-*-*)
1042     noconfigdirs="$noconfigdirs target-libgloss"
1043     ;;
1044   h8500-*-*)
1045     noconfigdirs="$noconfigdirs target-libgloss"
1046     ;;
1047   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1048     ;;
1049   hppa*64*-*-hpux*)
1050     noconfigdirs="$noconfigdirs gdb"
1051     ;;
1052   hppa*-*-hpux11*)
1053     noconfigdirs="$noconfigdirs gdb ld"
1054     ;;
1055   hppa*64*-*-linux*)
1056     ;;
1057   hppa*-*-linux*)
1058     ;;
1059   hppa*-*-*elf* | \
1060   hppa*-*-lites* | \
1061   hppa*-*-openbsd* | \
1062   hppa*64*-*-*)
1063     ;;
1064   hppa*-*-pro*)
1065     ;;
1066   hppa*-*-*)
1067     noconfigdirs="$noconfigdirs ld"
1068     ;;
1069   i960-*-*)
1070     noconfigdirs="$noconfigdirs gdb"
1071     ;;
1072   ia64*-*-elf*)
1073     # No gdb support yet.
1074     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1075     ;;
1076   ia64*-**-hpux*)
1077     # No ld support yet.
1078     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1079     ;;
1080   ia64*-*-*vms*)
1081     # No ld support yet.
1082     noconfigdirs="$noconfigdirs libgui itcl ld"
1083     ;;
1084   i[[3456789]]86-w64-mingw*)
1085     ;;
1086   i[[3456789]]86-*-mingw*)
1087     target_configdirs="$target_configdirs target-winsup"
1088     ;;
1089   *-*-cygwin*)
1090     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1091     noconfigdirs="$noconfigdirs target-libgloss"
1092     # always build newlib if winsup directory is present.
1093     if test -d "$srcdir/winsup/cygwin"; then
1094       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1095     elif test -d "$srcdir/newlib"; then
1096       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1097     fi
1098     ;;
1099   i[[3456789]]86-*-pe)
1100     noconfigdirs="$noconfigdirs target-libgloss"
1101     ;;
1102   i[[3456789]]86-*-sco3.2v5*)
1103     # The linker does not yet know about weak symbols in COFF,
1104     # and is not configured to handle mixed ELF and COFF.
1105     noconfigdirs="$noconfigdirs ld target-libgloss"
1106     ;;
1107   i[[3456789]]86-*-sco*)
1108     noconfigdirs="$noconfigdirs gprof target-libgloss"
1109     ;;
1110   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1111     noconfigdirs="$noconfigdirs target-libgloss"
1112     ;;
1113   i[[3456789]]86-*-sysv4*)
1114     noconfigdirs="$noconfigdirs target-libgloss"
1115     ;;
1116   i[[3456789]]86-*-beos*)
1117     noconfigdirs="$noconfigdirs gdb"
1118     ;;
1119   i[[3456789]]86-*-rdos*)
1120     noconfigdirs="$noconfigdirs gdb"
1121     ;;
1122   mmix-*-*)
1123     noconfigdirs="$noconfigdirs gdb"
1124     ;;
1125   mt-*-*)
1126     noconfigdirs="$noconfigdirs sim"
1127     ;;
1128   nfp-*-*)
1129     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1130     noconfigdirs="$noconfigdirs $target_libraries"
1131     ;;
1132   powerpc-*-aix*)
1133     # copied from rs6000-*-* entry
1134     noconfigdirs="$noconfigdirs gprof"
1135     ;;
1136   powerpc*-*-winnt* | powerpc*-*-pe*)
1137     target_configdirs="$target_configdirs target-winsup"
1138     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1139     # always build newlib.
1140     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1141     ;;
1142     # This is temporary until we can link against shared libraries
1143   powerpcle-*-solaris*)
1144     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1145     ;;
1146   powerpc-*-beos*)
1147     noconfigdirs="$noconfigdirs gdb"
1148     ;;
1149   rs6000-*-lynxos*)
1150     noconfigdirs="$noconfigdirs gprof"
1151     ;;
1152   rs6000-*-aix*)
1153     noconfigdirs="$noconfigdirs gprof"
1154     ;;
1155   rs6000-*-*)
1156     noconfigdirs="$noconfigdirs gprof"
1157     ;;
1158   m68k-apollo-*)
1159     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1160     ;;
1161   microblaze*)
1162     noconfigdirs="$noconfigdirs gprof"
1163     ;;
1164   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1165     if test x$with_newlib = xyes; then
1166       noconfigdirs="$noconfigdirs gprof"
1167     fi
1168     ;;
1169   mips*-*-irix5*)
1170     noconfigdirs="$noconfigdirs gprof target-libgloss"
1171     ;;
1172   mips*-*-irix6*)
1173     noconfigdirs="$noconfigdirs gprof target-libgloss"
1174     ;;
1175   mips*-*-bsd*)
1176     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1177     ;;
1178   mips*-*-linux*)
1179     ;;
1180   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1181   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1182     noconfigdirs="$noconfigdirs ld gas gprof"
1183     ;;
1184   mips*-*-*)
1185     noconfigdirs="$noconfigdirs gprof"
1186     ;;
1187   nvptx*-*-*)
1188     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1189     ;;
1190   sh-*-*)
1191     case "${target}" in
1192       sh*-*-elf)
1193          ;;
1194       *)
1195          noconfigdirs="$noconfigdirs target-libgloss" ;;
1196     esac
1197     ;;
1198   sparc-*-sunos4*)
1199     if test x${is_cross_compiler} = xno ; then
1200            use_gnu_ld=no
1201     fi
1202     ;;
1203   tic6x-*-*)
1204     noconfigdirs="$noconfigdirs sim"
1205     ;;
1206   tilepro*-*-* | tilegx*-*-*)
1207     noconfigdirs="$noconfigdirs sim"
1208     ;;
1209   v810-*-*)
1210     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1211     ;;
1212   vax-*-*)
1213     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1214     ;;
1215   wasm32-*-*)
1216     noconfigdirs="$noconfigdirs ld"
1217     ;;
1218 esac
1219
1220 # If we aren't building newlib, then don't build libgloss, since libgloss
1221 # depends upon some newlib header files.
1222 case "${noconfigdirs}" in
1223   *target-libgloss*) ;;
1224   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1225 esac
1226
1227 # Work in distributions that contain no compiler tools, like Autoconf.
1228 host_makefile_frag=/dev/null
1229 if test -d ${srcdir}/config ; then
1230 case "${host}" in
1231   i[[3456789]]86-*-msdosdjgpp*)
1232     host_makefile_frag="config/mh-djgpp"
1233     ;;
1234   *-cygwin*)
1235     ACX_CHECK_CYGWIN_CAT_WORKS
1236     host_makefile_frag="config/mh-cygwin"
1237     ;;
1238   *-mingw*)
1239     host_makefile_frag="config/mh-mingw"
1240     ;;
1241   alpha*-linux*)
1242     host_makefile_frag="config/mh-alpha-linux"
1243     ;;
1244   hppa*-hp-hpux10*)
1245     host_makefile_frag="config/mh-pa-hpux10"
1246     ;;
1247   hppa*-hp-hpux*)
1248     host_makefile_frag="config/mh-pa"
1249     ;;
1250   hppa*-*)
1251     host_makefile_frag="config/mh-pa"
1252     ;;
1253   *-*-darwin*)
1254     host_makefile_frag="config/mh-darwin"
1255     ;;
1256   powerpc-*-aix*)
1257     host_makefile_frag="config/mh-ppc-aix"
1258     ;;
1259   rs6000-*-aix*)
1260     host_makefile_frag="config/mh-ppc-aix"
1261     ;;
1262 esac
1263 fi
1264
1265 if test "${build}" != "${host}" ; then
1266   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1267   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1268   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1269   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1270   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1271   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1272   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1273   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1274   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1275   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1276   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1277   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1278   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1279 else
1280   AR_FOR_BUILD="\$(AR)"
1281   AS_FOR_BUILD="\$(AS)"
1282   CC_FOR_BUILD="\$(CC)"
1283   CXX_FOR_BUILD="\$(CXX)"
1284   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1285   GOC_FOR_BUILD="\$(GOC)"
1286   GDC_FOR_BUILD="\$(GDC)"
1287   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1288   LD_FOR_BUILD="\$(LD)"
1289   NM_FOR_BUILD="\$(NM)"
1290   RANLIB_FOR_BUILD="\$(RANLIB)"
1291   WINDRES_FOR_BUILD="\$(WINDRES)"
1292   WINDMC_FOR_BUILD="\$(WINDMC)"
1293 fi
1294
1295 AC_PROG_CC
1296 AC_PROG_CXX
1297
1298 # We must set the default linker to the linker used by gcc for the correct
1299 # operation of libtool.  If LD is not defined and we are using gcc, try to
1300 # set the LD default to the ld used by gcc.
1301 if test -z "$LD"; then
1302   if test "$GCC" = yes; then
1303     case $build in
1304     *-*-mingw*)
1305       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1306     *)
1307       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1308     esac
1309     case $gcc_prog_ld in
1310     # Accept absolute paths.
1311     [[\\/]* | [A-Za-z]:[\\/]*)]
1312       LD="$gcc_prog_ld" ;;
1313     esac
1314   fi
1315 fi
1316
1317 # Check whether -static-libstdc++ -static-libgcc is supported.
1318 have_static_libs=no
1319 if test "$GCC" = yes; then
1320   saved_LDFLAGS="$LDFLAGS"
1321
1322   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1323   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1324   AC_LANG_PUSH(C++)
1325   AC_LINK_IFELSE([AC_LANG_SOURCE([
1326 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1327 #error -static-libstdc++ not implemented
1328 #endif
1329 int main() {}])],
1330     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1331     [AC_MSG_RESULT([no])])
1332   AC_LANG_POP(C++)
1333
1334   LDFLAGS="$saved_LDFLAGS"
1335 fi
1336
1337 ACX_PROG_GNAT
1338 ACX_PROG_CMP_IGNORE_INITIAL
1339
1340 AC_ARG_ENABLE([bootstrap],
1341 [AS_HELP_STRING([--enable-bootstrap],
1342                 [enable bootstrapping @<:@yes if native build@:>@])],,
1343 enable_bootstrap=default)
1344
1345 # Issue errors and warnings for invalid/strange bootstrap combinations.
1346 if test -r $srcdir/gcc/configure; then
1347   have_compiler=yes
1348 else
1349   have_compiler=no
1350 fi
1351
1352 case "$have_compiler:$host:$target:$enable_bootstrap" in
1353   *:*:*:no) ;;
1354
1355   # Default behavior.  Enable bootstrap if we have a compiler
1356   # and we are in a native configuration.
1357   yes:$build:$build:default)
1358     enable_bootstrap=yes ;;
1359
1360   *:*:*:default)
1361     enable_bootstrap=no ;;
1362
1363   # We have a compiler and we are in a native configuration, bootstrap is ok
1364   yes:$build:$build:yes)
1365     ;;
1366
1367   # Other configurations, but we have a compiler.  Assume the user knows
1368   # what he's doing.
1369   yes:*:*:yes)
1370     AC_MSG_WARN([trying to bootstrap a cross compiler])
1371     ;;
1372
1373   # No compiler: if they passed --enable-bootstrap explicitly, fail
1374   no:*:*:yes)
1375     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1376
1377   # Fail if wrong command line
1378   *)
1379     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1380     ;;
1381 esac
1382
1383 # When bootstrapping with GCC, build stage 1 in C++98 mode to ensure that a
1384 # C++98 compiler can still start the bootstrap.
1385 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1386   CXX="$CXX -std=gnu++98"
1387 fi
1388
1389 # Used for setting $lt_cv_objdir
1390 _LT_CHECK_OBJDIR
1391
1392 # Check for GMP, MPFR and MPC
1393 gmplibs="-lmpc -lmpfr -lgmp"
1394 gmpinc=
1395 have_gmp=no
1396
1397 # Specify a location for mpc
1398 # check for this first so it ends up on the link line before mpfr.
1399 AC_ARG_WITH(mpc,
1400 [AS_HELP_STRING([--with-mpc=PATH],
1401                 [specify prefix directory for installed MPC package.
1402                  Equivalent to --with-mpc-include=PATH/include
1403                  plus --with-mpc-lib=PATH/lib])])
1404 AC_ARG_WITH(mpc-include,
1405 [AS_HELP_STRING([--with-mpc-include=PATH],
1406                 [specify directory for installed MPC include files])])
1407 AC_ARG_WITH(mpc-lib,
1408 [AS_HELP_STRING([--with-mpc-lib=PATH],
1409                 [specify directory for the installed MPC library])])
1410
1411 if test "x$with_mpc" != x; then
1412   gmplibs="-L$with_mpc/lib $gmplibs"
1413   gmpinc="-I$with_mpc/include $gmpinc"
1414 fi
1415 if test "x$with_mpc_include" != x; then
1416   gmpinc="-I$with_mpc_include $gmpinc"
1417 fi
1418 if test "x$with_mpc_lib" != x; then
1419   gmplibs="-L$with_mpc_lib $gmplibs"
1420 fi
1421 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1422   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1423   gmpinc='-I$$s/mpc/src '"$gmpinc"
1424   # Do not test the mpc version.  Assume that it is sufficient, since
1425   # it is in the source tree, and the library has not been built yet
1426   # but it would be included on the link line in the version check below
1427   # hence making the test fail.
1428   have_gmp=yes
1429 fi
1430
1431 # Specify a location for mpfr
1432 # check for this first so it ends up on the link line before gmp.
1433 AC_ARG_WITH(mpfr-dir,
1434 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1435 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1436 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1437
1438 AC_ARG_WITH(mpfr,
1439 [AS_HELP_STRING([--with-mpfr=PATH],
1440                 [specify prefix directory for installed MPFR package.
1441                  Equivalent to --with-mpfr-include=PATH/include
1442                  plus --with-mpfr-lib=PATH/lib])])
1443 AC_ARG_WITH(mpfr-include,
1444 [AS_HELP_STRING([--with-mpfr-include=PATH],
1445                 [specify directory for installed MPFR include files])])
1446 AC_ARG_WITH(mpfr-lib,
1447 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1448                 [specify directory for the installed MPFR library])])
1449
1450 if test "x$with_mpfr" != x; then
1451   gmplibs="-L$with_mpfr/lib $gmplibs"
1452   gmpinc="-I$with_mpfr/include $gmpinc"
1453 fi
1454 if test "x$with_mpfr_include" != x; then
1455   gmpinc="-I$with_mpfr_include $gmpinc"
1456 fi
1457 if test "x$with_mpfr_lib" != x; then
1458   gmplibs="-L$with_mpfr_lib $gmplibs"
1459 fi
1460 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1461   # MPFR v3.1.0 moved the sources into a src sub-directory.
1462   if ! test -d ${srcdir}/mpfr/src; then
1463     AC_MSG_ERROR([dnl
1464 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1465   fi
1466   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1467   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1468   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1469   # Do not test the mpfr version.  Assume that it is sufficient, since
1470   # it is in the source tree, and the library has not been built yet
1471   # but it would be included on the link line in the version check below
1472   # hence making the test fail.
1473   have_gmp=yes
1474 fi
1475
1476 # Specify a location for gmp
1477 AC_ARG_WITH(gmp-dir,
1478 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1479 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1480 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1481
1482 AC_ARG_WITH(gmp,
1483 [AS_HELP_STRING([--with-gmp=PATH],
1484                 [specify prefix directory for the installed GMP package.
1485                  Equivalent to --with-gmp-include=PATH/include
1486                  plus --with-gmp-lib=PATH/lib])])
1487 AC_ARG_WITH(gmp-include,
1488 [AS_HELP_STRING([--with-gmp-include=PATH],
1489                 [specify directory for installed GMP include files])])
1490 AC_ARG_WITH(gmp-lib,
1491 [AS_HELP_STRING([--with-gmp-lib=PATH],
1492                 [specify directory for the installed GMP library])])
1493
1494
1495 if test "x$with_gmp" != x; then
1496   gmplibs="-L$with_gmp/lib $gmplibs"
1497   gmpinc="-I$with_gmp/include $gmpinc"
1498 fi
1499 if test "x$with_gmp_include" != x; then
1500   gmpinc="-I$with_gmp_include $gmpinc"
1501 fi
1502 if test "x$with_gmp_lib" != x; then
1503   gmplibs="-L$with_gmp_lib $gmplibs"
1504 fi
1505 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1506   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1507   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1508   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1509   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1510   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1511   # Do not test the gmp version.  Assume that it is sufficient, since
1512   # it is in the source tree, and the library has not been built yet
1513   # but it would be included on the link line in the version check below
1514   # hence making the test fail.
1515   have_gmp=yes
1516 fi
1517
1518 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1519   have_gmp=yes
1520   saved_CFLAGS="$CFLAGS"
1521   CFLAGS="$CFLAGS $gmpinc"
1522   # Check for the recommended and required versions of GMP.
1523   AC_MSG_CHECKING([for the correct version of gmp.h])
1524   AC_TRY_COMPILE([#include "gmp.h"],[
1525   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1526   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1527   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1528   choke me
1529   #endif
1530   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1531   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1532   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1533   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1534   choke me
1535   #endif
1536   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1537    [AC_MSG_RESULT([no]); have_gmp=no])
1538
1539   # If we have GMP, check the MPFR version.
1540   if test x"$have_gmp" = xyes; then
1541     # Check for the recommended and required versions of MPFR.
1542     AC_MSG_CHECKING([for the correct version of mpfr.h])
1543     AC_TRY_COMPILE([#include <gmp.h>
1544     #include <mpfr.h>],[
1545     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,0)
1546     choke me
1547     #endif
1548     ], [AC_TRY_COMPILE([#include <gmp.h>
1549     #include <mpfr.h>],[
1550     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,2)
1551     choke me
1552     #endif
1553     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1554      [AC_MSG_RESULT([no]); have_gmp=no])
1555   fi
1556
1557   # Check for the MPC header version.
1558   if test x"$have_gmp" = xyes ; then
1559     # Check for the recommended and required versions of MPC.
1560     AC_MSG_CHECKING([for the correct version of mpc.h])
1561     AC_TRY_COMPILE([#include <mpc.h>],[
1562     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1563     choke me
1564     #endif
1565     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1566     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1567     choke me
1568     #endif
1569     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1570      [AC_MSG_RESULT([no]); have_gmp=no])
1571   fi
1572
1573   # Now check the MPFR library.
1574   if test x"$have_gmp" = xyes; then
1575     saved_LIBS="$LIBS"
1576     LIBS="$LIBS $gmplibs"
1577     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1578     AC_TRY_LINK([#include <mpc.h>],[
1579     mpfr_t n;
1580     mpfr_t x;
1581     mpc_t c;
1582     int t;
1583     mpfr_init (n);
1584     mpfr_init (x);
1585     mpfr_atan2 (n, n, x, GMP_RNDN);
1586     mpfr_erfc (n, x, GMP_RNDN);
1587     mpfr_subnormalize (x, t, GMP_RNDN);
1588     mpfr_clear(n);
1589     mpfr_clear(x);
1590     mpc_init2 (c, 53);
1591     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1592     mpc_cosh (c, c, MPC_RNDNN);
1593     mpc_pow (c, c, c, MPC_RNDNN);
1594     mpc_acosh (c, c, MPC_RNDNN);
1595     mpc_clear (c);
1596     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1597     LIBS="$saved_LIBS"
1598   fi
1599
1600   CFLAGS="$saved_CFLAGS"
1601
1602 # The library versions listed in the error message below should match
1603 # the HARD-minimums enforced above.
1604   if test x$have_gmp != xyes; then
1605     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
1606 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1607 their locations.  Source code for these libraries can be found at
1608 their respective hosting sites as well as at
1609 ftp://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1610 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1611 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1612 make sure that you have installed both the libraries and the header
1613 files.  They may be located in separate packages.])
1614   fi
1615 fi
1616
1617 # Flags needed for both GMP, MPFR and/or MPC.
1618 AC_SUBST(gmplibs)
1619 AC_SUBST(gmpinc)
1620 AC_SUBST(extra_mpfr_configure_flags)
1621 AC_SUBST(extra_mpc_gmp_configure_flags)
1622 AC_SUBST(extra_mpc_mpfr_configure_flags)
1623 AC_SUBST(extra_isl_gmp_configure_flags)
1624
1625 # Libraries to use for stage1 or when not bootstrapping.
1626 AC_ARG_WITH(stage1-libs,
1627 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1628 [if test "$withval" = "no" -o "$withval" = "yes"; then
1629    stage1_libs=
1630  else
1631    stage1_libs=$withval
1632  fi],
1633 [stage1_libs=])
1634 AC_SUBST(stage1_libs)
1635
1636 # Linker flags to use for stage1 or when not bootstrapping.
1637 AC_ARG_WITH(stage1-ldflags,
1638 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1639 [if test "$withval" = "no" -o "$withval" = "yes"; then
1640    stage1_ldflags=
1641  else
1642    stage1_ldflags=$withval
1643  fi],
1644 [stage1_ldflags=
1645  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1646  # if supported.  But if the user explicitly specified the libraries to use,
1647  # trust that they are doing what they want.
1648  if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
1649    stage1_ldflags="-static-libstdc++ -static-libgcc"
1650  fi])
1651 AC_SUBST(stage1_ldflags)
1652
1653 # Libraries to use for stage2 and later builds.
1654 AC_ARG_WITH(boot-libs,
1655 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1656 [if test "$withval" = "no" -o "$withval" = "yes"; then
1657    poststage1_libs=
1658  else
1659    poststage1_libs=$withval
1660  fi],
1661 [poststage1_libs=])
1662 AC_SUBST(poststage1_libs)
1663
1664 # Linker flags to use for stage2 and later builds.
1665 AC_ARG_WITH(boot-ldflags,
1666 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1667                 [linker flags for stage2 and later])],
1668 [if test "$withval" = "no" -o "$withval" = "yes"; then
1669    poststage1_ldflags=
1670  else
1671    poststage1_ldflags=$withval
1672  fi],
1673 [poststage1_ldflags=
1674  # In stages 2 and 3, default to linking libstdc++ and libgcc
1675  # statically.  But if the user explicitly specified the libraries to
1676  # use, trust that they are doing what they want.
1677  if test "$poststage1_libs" = ""; then
1678    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1679  fi])
1680 AC_SUBST(poststage1_ldflags)
1681
1682 # GCC GRAPHITE dependency isl.
1683 # Basic setup is inlined here, actual checks are in config/isl.m4
1684
1685 AC_ARG_WITH(isl,
1686   [AS_HELP_STRING(
1687    [--with-isl=PATH],
1688    [Specify prefix directory for the installed isl package.
1689     Equivalent to --with-isl-include=PATH/include
1690     plus --with-isl-lib=PATH/lib])])
1691
1692 # Treat --without-isl as a request to disable
1693 # GRAPHITE support and skip all following checks.
1694 if test "x$with_isl" != "xno"; then
1695   # Check for isl
1696   dnl Provide configure switches and initialize islinc & isllibs
1697   dnl with user input.
1698   ISL_INIT_FLAGS
1699   dnl The versions of isl that work for Graphite
1700   ISL_CHECK_VERSION()
1701   dnl Only execute fail-action, if isl has been requested.
1702   ISL_IF_FAILED([
1703     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1704 fi
1705
1706 # If the isl check failed, disable builds of in-tree variant of isl
1707 if test "x$with_isl" = xno ||
1708    test "x$gcc_cv_isl" = xno; then
1709   noconfigdirs="$noconfigdirs isl"
1710   islinc=
1711 fi
1712
1713 AC_SUBST(isllibs)
1714 AC_SUBST(islinc)
1715
1716 # Check for LTO support.
1717 AC_ARG_ENABLE(lto,
1718 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1719 enable_lto=$enableval,
1720 enable_lto=yes; default_enable_lto=yes)
1721
1722 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1723   build_lto_plugin=yes
1724 ],[if test x"$default_enable_lto" = x"yes" ; then
1725     case $target in
1726       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1727       # On other non-ELF platforms, LTO has yet to be validated.
1728       *) enable_lto=no ;;
1729     esac
1730   else
1731   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1732   # It would also be nice to check the binutils support, but we don't
1733   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1734   # warn during gcc/ subconfigure; unless you're bootstrapping with
1735   # -flto it won't be needed until after installation anyway.
1736     case $target in
1737       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1738       *) if test x"$enable_lto" = x"yes"; then
1739         AC_MSG_ERROR([LTO support is not enabled for this target.])
1740         fi
1741       ;;
1742     esac
1743   fi
1744   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1745   # Build it unless LTO was explicitly disabled.
1746   case $target in
1747     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1748     *) ;;
1749   esac
1750 ])
1751
1752 AC_ARG_ENABLE(linker-plugin-configure-flags,
1753   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1754     [additional flags for configuring linker plugins @<:@none@:>@])],
1755   extra_linker_plugin_configure_flags=$enableval,
1756   extra_linker_plugin_configure_flags=)
1757 AC_SUBST(extra_linker_plugin_configure_flags)
1758 AC_ARG_ENABLE(linker-plugin-flags,
1759   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1760     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1761   extra_linker_plugin_flags=$enableval,
1762   extra_linker_plugin_flags=)
1763 AC_SUBST(extra_linker_plugin_flags)
1764
1765 # Enable --enable-host-shared.
1766 # Checked early to determine whether jit is an 'all' language
1767 AC_ARG_ENABLE(host-shared,
1768 [AS_HELP_STRING([--enable-host-shared],
1769                 [build host code as shared libraries])],
1770 [host_shared=$enableval], [host_shared=no])
1771 AC_SUBST(host_shared)
1772
1773 # By default, C and C++ are the only stage 1 languages.
1774 stage1_languages=,c,
1775
1776 # Target libraries that we bootstrap.
1777 bootstrap_target_libs=,target-libgcc,
1778
1779 # Figure out what language subdirectories are present.
1780 # Look if the user specified --enable-languages="..."; if not, use
1781 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1782 # go away some day.
1783 # NB:  embedded tabs in this IF block -- do not untabify
1784 if test -d ${srcdir}/gcc; then
1785   if test x"${enable_languages+set}" != xset; then
1786     if test x"${LANGUAGES+set}" = xset; then
1787       enable_languages="${LANGUAGES}"
1788         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1789     else
1790       enable_languages=default
1791     fi
1792   else
1793     if test x"${enable_languages}" = x ||
1794        test x"${enable_languages}" = xyes;
1795        then
1796       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1797       exit 1
1798     fi
1799   fi
1800   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1801
1802   # 'f95' is the old name for the 'fortran' language. We issue a warning
1803   # and make the substitution.
1804   case ,${enable_languages}, in
1805     *,f95,*)
1806       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1807       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1808       ;;
1809   esac
1810
1811   # If bootstrapping, C++ must be enabled.
1812   case ",$enable_languages,:$enable_bootstrap" in
1813     *,c++,*:*) ;;
1814     *:yes)
1815       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1816         enable_languages="${enable_languages},c++"
1817       else
1818         AC_MSG_ERROR([bootstrapping requires c++ sources])
1819       fi
1820       ;;
1821   esac
1822
1823   # First scan to see if an enabled language requires some other language.
1824   # We assume that a given config-lang.in will list all the language
1825   # front ends it requires, even if some are required indirectly.
1826   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1827     case ${lang_frag} in
1828       ..) ;;
1829       # The odd quoting in the next line works around
1830       # an apparent bug in bash 1.12 on linux.
1831       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1832       *)
1833         # From the config-lang.in, get $language, $lang_requires, and
1834         # $lang_requires_boot_languages.
1835         language=
1836         lang_requires=
1837         lang_requires_boot_languages=
1838         # set srcdir during sourcing lang_frag to the gcc dir.
1839         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
1840         # polutes this shell
1841         saved_srcdir=${srcdir}
1842         srcdir=${srcdir}/gcc . ${lang_frag}
1843         srcdir=${saved_srcdir}
1844         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1845           case ,${enable_languages}, in
1846             *,$other,*) ;;
1847             *,default,*) ;;
1848             *,all,*) ;;
1849             *,$language,*)
1850               echo " \`$other' language required by \`$language'; enabling" 1>&2
1851               enable_languages="${enable_languages},${other}"
1852               ;;
1853           esac
1854         done
1855         for other in ${lang_requires_boot_languages} ; do
1856           if test "$other" != "c"; then
1857             case ,${enable_stage1_languages}, in
1858               *,$other,*) ;;
1859               *,default,*) ;;
1860               *,all,*) ;;
1861               *)
1862                 case ,${enable_languages}, in
1863                   *,$language,*)
1864                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1865                     enable_stage1_languages="$enable_stage1_languages,${other}"
1866                     ;;
1867                 esac
1868                 ;;
1869             esac
1870           fi
1871         done
1872         ;;
1873     esac
1874   done
1875
1876   new_enable_languages=,c,
1877
1878   # If LTO is enabled, add the LTO front end.
1879   if test "$enable_lto" = "yes" ; then
1880     case ,${enable_languages}, in
1881       *,lto,*) ;;
1882       *) enable_languages="${enable_languages},lto" ;;
1883     esac
1884     if test "${build_lto_plugin}" = "yes" ; then
1885       configdirs="$configdirs lto-plugin"
1886     fi
1887   fi
1888
1889   # If we're building an offloading compiler, add the LTO front end.
1890   if test x"$enable_as_accelerator_for" != x ; then
1891     case ,${enable_languages}, in
1892       *,lto,*) ;;
1893       *) enable_languages="${enable_languages},lto" ;;
1894     esac
1895   fi
1896
1897   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
1898   potential_languages=,c,
1899
1900   enabled_target_libs=
1901   disabled_target_libs=
1902
1903   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1904     case ${lang_frag} in
1905       ..) ;;
1906       # The odd quoting in the next line works around
1907       # an apparent bug in bash 1.12 on linux.
1908       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1909       *)
1910         # From the config-lang.in, get $language, $target_libs,
1911         # $lang_dirs, $boot_language, and $build_by_default
1912         language=
1913         target_libs=
1914         lang_dirs=
1915         subdir_requires=
1916         boot_language=no
1917         build_by_default=yes
1918         # set srcdir during sourcing.  See above about save & restore
1919         saved_srcdir=${srcdir}
1920         srcdir=${srcdir}/gcc . ${lang_frag}
1921         srcdir=${saved_srcdir}
1922         if test x${language} = x; then
1923           echo "${lang_frag} doesn't set \$language." 1>&2
1924           exit 1
1925         fi
1926
1927         if test "$language" = "c++"; then
1928           boot_language=yes
1929         fi
1930
1931         add_this_lang=no
1932         # C is always enabled, so no need to add it again
1933         if test "$language" != "c"; then
1934           case ,${enable_languages}, in
1935             *,${language},*)
1936               # Language was explicitly selected; include it
1937               add_this_lang=yes
1938               ;;
1939             *,all,*)
1940               # All languages are enabled
1941               add_this_lang=all
1942               ;;
1943             *,default,*)
1944               # 'default' was selected, select it if it is a default language
1945               add_this_lang=${build_by_default}
1946               ;;
1947           esac
1948         fi
1949
1950         # Disable languages that need other directories if these aren't available.
1951         for i in $subdir_requires; do
1952           test -f "$srcdir/gcc/$i/config-lang.in" && continue
1953           case ${add_this_lang} in
1954             yes)
1955               # Specifically requested language; tell them.
1956               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
1957               ;;
1958             all)
1959               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
1960               add_this_lang=unsupported
1961               ;;
1962             *)
1963               # Silently disable.
1964               add_this_lang=unsupported
1965               ;;
1966           esac
1967         done
1968
1969         # Disable Ada if no preexisting GNAT is available.
1970         case ${add_this_lang}:${language}:${have_gnat} in
1971           yes:ada:no)
1972             # Specifically requested language; tell them.
1973             AC_MSG_ERROR([GNAT is required to build $language])
1974             ;;
1975           all:ada:no)
1976             AC_MSG_WARN([GNAT is required to build $language])
1977             add_this_lang=unsupported
1978             ;;
1979           *:ada:no)
1980             # Silently disable.
1981             add_this_lang=unsupported
1982             ;;
1983         esac
1984
1985         # Disable jit if -enable-host-shared not specified
1986         case ${add_this_lang}:${language}:${host_shared} in
1987           yes:jit:no)
1988             # PR jit/64780: explicitly specify --enable-host-shared
1989             AC_MSG_ERROR([
1990 Enabling language "jit" requires --enable-host-shared.
1991
1992 --enable-host-shared typically slows the rest of the compiler down by
1993 a few %, so you must explicitly enable it.
1994
1995 If you want to build both the jit and the regular compiler, it is often
1996 best to do this via two separate configure/builds, in separate
1997 directories, to avoid imposing the performance cost of
1998 --enable-host-shared on the regular compiler.])
1999             ;;
2000           all:jit:no)
2001             AC_MSG_WARN([--enable-host-shared required to build $language])
2002             add_this_lang=unsupported
2003             ;;
2004           *:jit:no)
2005             # Silently disable.
2006             add_this_lang=unsupported
2007             ;;
2008         esac
2009
2010         # Disable a language that is unsupported by the target.
2011         case "${add_this_lang}: $unsupported_languages " in
2012           no:*) ;;
2013           unsupported:*) ;;
2014           *:*" $language "*)
2015             AC_MSG_WARN([${language} not supported for this target])
2016             add_this_lang=unsupported
2017             ;;
2018         esac
2019
2020         case $add_this_lang in
2021           unsupported)
2022             # Remove language-dependent dirs.
2023             disabled_target_libs="$disabled_target_libs $target_libs"
2024             noconfigdirs="$noconfigdirs $lang_dirs"
2025             ;;
2026           no)
2027             # Remove language-dependent dirs; still show language as supported.
2028             disabled_target_libs="$disabled_target_libs $target_libs"
2029             noconfigdirs="$noconfigdirs $lang_dirs"
2030             potential_languages="${potential_languages}${language},"
2031             ;;
2032           all|yes)
2033             new_enable_languages="${new_enable_languages}${language},"
2034             potential_languages="${potential_languages}${language},"
2035             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2036             enabled_target_libs="$enabled_target_libs $target_libs"
2037             case "${boot_language}:,$enable_stage1_languages," in
2038               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2039                 # Add to (comma-separated) list of stage 1 languages.
2040                 case ",$stage1_languages," in
2041                   *,$language,* | ,yes, | ,all,) ;;
2042                   *) stage1_languages="${stage1_languages}${language}," ;;
2043                 esac
2044                 # We need to bootstrap any supporting libraries.
2045                 bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
2046                 ;;
2047             esac
2048             ;;
2049         esac
2050         ;;
2051     esac
2052   done
2053
2054   # Add target libraries which are only needed for disabled languages
2055   # to noconfigdirs.
2056   if test -n "$disabled_target_libs"; then
2057     for dir in $disabled_target_libs; do
2058       case " $enabled_target_libs " in
2059       *" ${dir} "*) ;;
2060       *) noconfigdirs="$noconfigdirs $dir" ;;
2061       esac
2062     done
2063   fi
2064
2065   AC_ARG_ENABLE(stage1-languages,
2066   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2067                   [choose additional languages to build during
2068                   stage1.  Mostly useful for compiler development])],
2069   [case ,${enable_stage1_languages}, in
2070     ,no,|,,)
2071       # Set it to something that will have no effect in the loop below
2072       enable_stage1_languages=c ;;
2073     ,yes,)
2074       enable_stage1_languages=`echo $new_enable_languages | \
2075         sed -e "s/^,//" -e "s/,$//" ` ;;
2076     *,all,*)
2077       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2078         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2079   esac
2080
2081   # Add "good" languages from enable_stage1_languages to stage1_languages,
2082   # while "bad" languages go in missing_languages.  Leave no duplicates.
2083   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2084     case $potential_languages in
2085       *,$i,*)
2086         case $stage1_languages in
2087           *,$i,*) ;;
2088           *) stage1_languages="$stage1_languages$i," ;;
2089         esac ;;
2090       *)
2091         case $missing_languages in
2092           *,$i,*) ;;
2093           *) missing_languages="$missing_languages$i," ;;
2094         esac ;;
2095      esac
2096   done])
2097
2098   # Remove leading/trailing commas that were added for simplicity
2099   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2100   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2101   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2102   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2103
2104   if test "x$missing_languages" != x; then
2105     AC_MSG_ERROR([
2106 The following requested languages could not be built: ${missing_languages}
2107 Supported languages are: ${potential_languages}])
2108   fi
2109   if test "x$new_enable_languages" != "x$enable_languages"; then
2110     echo The following languages will be built: ${new_enable_languages}
2111     enable_languages="$new_enable_languages"
2112   fi
2113
2114   AC_SUBST(stage1_languages)
2115   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2116 fi
2117
2118 # Handle --disable-<component> generically.
2119 for dir in $configdirs $build_configdirs $target_configdirs ; do
2120   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2121   varname=`echo $dirname | sed -e s/+/_/g`
2122   if eval test x\${enable_${varname}} "=" xno ; then
2123     noconfigdirs="$noconfigdirs $dir"
2124   fi
2125 done
2126
2127 # Check for Boehm's garbage collector
2128 AC_ARG_ENABLE(objc-gc,
2129 [AS_HELP_STRING([--enable-objc-gc],
2130                 [enable use of Boehm's garbage collector with the
2131                  GNU Objective-C runtime])])
2132 AC_ARG_WITH([target-bdw-gc],
2133 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2134                 [specify prefix directory for installed bdw-gc package.
2135                  Equivalent to --with-target-bdw-gc-include=PATH/include
2136                  plus --with-target-bdw-gc-lib=PATH/lib])])
2137 AC_ARG_WITH([target-bdw-gc-include],
2138 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2139                 [specify directories for installed bdw-gc include files])])
2140 AC_ARG_WITH([target-bdw-gc-lib],
2141 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2142                 [specify directories for installed bdw-gc library])])
2143
2144 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2145   AC_MSG_CHECKING([for bdw garbage collector])
2146   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2147     dnl no bdw-gw options, assume default locations
2148     AC_MSG_RESULT([using bdw-gc in default locations])
2149   else
2150     dnl bdw-gw options, first error checking, complete checking in libobjc
2151     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2152       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2153     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2154       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2155     else
2156       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2157     fi
2158   fi
2159 esac
2160
2161 # Disable libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2162 case ,${enable_languages}, in
2163   *,c++,*)
2164     # Disable libitm, libsanitizer if we're not building libstdc++
2165     case "${noconfigdirs}" in
2166       *target-libstdc++-v3*)
2167         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2168         ;;
2169       *) ;;
2170     esac
2171     ;;
2172   *)
2173     noconfigdirs="$noconfigdirs target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2174     ;;
2175 esac
2176
2177 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2178 # $build_configdirs and $target_configdirs.
2179 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2180
2181 notsupp=""
2182 for dir in . $skipdirs $noconfigdirs ; do
2183   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2184   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2185     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2186     if test -r $srcdir/$dirname/configure ; then
2187       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2188         true
2189       else
2190         notsupp="$notsupp $dir"
2191       fi
2192     fi
2193   fi
2194   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2195     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2196     if test -r $srcdir/$dirname/configure ; then
2197       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2198         true
2199       else
2200         notsupp="$notsupp $dir"
2201       fi
2202     fi
2203   fi
2204   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2205     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2206     if test -r $srcdir/$dirname/configure ; then
2207       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2208         true
2209       else
2210         notsupp="$notsupp $dir"
2211       fi
2212     fi
2213   fi
2214 done
2215
2216 # Quietly strip out all directories which aren't configurable in this tree.
2217 # This relies on all configurable subdirectories being autoconfiscated, which
2218 # is now the case.
2219 build_configdirs_all="$build_configdirs"
2220 build_configdirs=
2221 for i in ${build_configdirs_all} ; do
2222   j=`echo $i | sed -e s/build-//g`
2223   if test -f ${srcdir}/$j/configure ; then
2224     build_configdirs="${build_configdirs} $i"
2225   fi
2226 done
2227
2228 configdirs_all="$configdirs"
2229 configdirs=
2230 for i in ${configdirs_all} ; do
2231   if test -f ${srcdir}/$i/configure ; then
2232     configdirs="${configdirs} $i"
2233   fi
2234 done
2235
2236 target_configdirs_all="$target_configdirs"
2237 target_configdirs=
2238 for i in ${target_configdirs_all} ; do
2239   j=`echo $i | sed -e s/target-//g`
2240   if test -f ${srcdir}/$j/configure ; then
2241     target_configdirs="${target_configdirs} $i"
2242   fi
2243 done
2244
2245 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2246 # so we have to add it after the preceding checks.
2247 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2248 then
2249   case " $configdirs " in
2250     *" libiberty "*)
2251       # If we can build libiberty, we can also build libiberty-linker-plugin.
2252       configdirs="$configdirs libiberty-linker-plugin"
2253       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2254         --with-libiberty=../libiberty-linker-plugin";;
2255     *)
2256       AC_MSG_ERROR([libiberty missing]);;
2257   esac
2258 fi
2259
2260 # Sometimes we have special requirements for the host libiberty.
2261 extra_host_libiberty_configure_flags=
2262 extra_host_zlib_configure_flags=
2263 case " $configdirs " in
2264   *" lto-plugin "* | *" libcc1 "*)
2265     # When these are to be built as shared libraries, the same applies to
2266     # libiberty.
2267     extra_host_libiberty_configure_flags=--enable-shared
2268     ;;
2269   *" bfd "*)
2270     # When bfd is to be built as a shared library, the same applies to
2271     # zlib.
2272     if test "$enable_shared" = "yes"; then
2273       extra_host_zlib_configure_flags=--enable-host-shared
2274     fi
2275     ;;
2276 esac
2277 AC_SUBST(extra_host_libiberty_configure_flags)
2278 AC_SUBST(extra_host_zlib_configure_flags)
2279
2280 # Produce a warning message for the subdirs we can't configure.
2281 # This isn't especially interesting in the Cygnus tree, but in the individual
2282 # FSF releases, it's important to let people know when their machine isn't
2283 # supported by the one or two programs in a package.
2284
2285 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2286   # If $appdirs is non-empty, at least one of those directories must still
2287   # be configured, or we error out.  (E.g., if the gas release supports a
2288   # specified target in some subdirs but not the gas subdir, we shouldn't
2289   # pretend that all is well.)
2290   if test -n "$appdirs" ; then
2291     for dir in $appdirs ; do
2292       if test -r $dir/Makefile.in ; then
2293         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2294           appdirs=""
2295           break
2296         fi
2297         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2298           appdirs=""
2299           break
2300         fi
2301       fi
2302     done
2303     if test -n "$appdirs" ; then
2304       echo "*** This configuration is not supported by this package." 1>&2
2305       exit 1
2306     fi
2307   fi
2308   # Okay, some application will build, or we don't care to check.  Still
2309   # notify of subdirs not getting built.
2310   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2311   echo "    ${notsupp}" 1>&2
2312   echo "    (Any other directories should still work fine.)" 1>&2
2313 fi
2314
2315 case "$host" in
2316   *msdosdjgpp*)
2317     enable_gdbtk=no ;;
2318 esac
2319
2320 # To find our prefix, in gcc_cv_tool_prefix.
2321 ACX_TOOL_DIRS
2322
2323 copy_dirs=
2324
2325 AC_ARG_WITH([build-sysroot],
2326   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2327                   [use sysroot as the system root during the build])],
2328   [if test x"$withval" != x ; then
2329      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2330    fi],
2331   [SYSROOT_CFLAGS_FOR_TARGET=])
2332 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2333
2334 AC_ARG_WITH([debug-prefix-map],
2335   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2336                   [map A to B, C to D ... in debug information])],
2337   [if test x"$withval" != x; then
2338      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2339      for debug_map in $withval; do
2340        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2341      done
2342    fi],
2343   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2344 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2345
2346 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2347 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2348 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2349 # We want to ensure that TARGET libraries (which we know are built with
2350 # gcc) are built with "-O2 -g", so include those options when setting
2351 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2352 if test "x$CFLAGS_FOR_TARGET" = x; then
2353   if test "x${is_cross_compiler}" = xyes; then
2354     CFLAGS_FOR_TARGET="-g -O2"
2355   else
2356     CFLAGS_FOR_TARGET=$CFLAGS
2357     case " $CFLAGS " in
2358       *" -O2 "*) ;;
2359       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2360     esac
2361     case " $CFLAGS " in
2362       *" -g "* | *" -g3 "*) ;;
2363       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2364     esac
2365   fi
2366 fi
2367 AC_SUBST(CFLAGS_FOR_TARGET)
2368
2369 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2370   if test "x${is_cross_compiler}" = xyes; then
2371     CXXFLAGS_FOR_TARGET="-g -O2"
2372   else
2373     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2374     case " $CXXFLAGS " in
2375       *" -O2 "*) ;;
2376       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2377     esac
2378     case " $CXXFLAGS " in
2379       *" -g "* | *" -g3 "*) ;;
2380       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2381     esac
2382   fi
2383 fi
2384 AC_SUBST(CXXFLAGS_FOR_TARGET)
2385
2386 AC_SUBST(LDFLAGS_FOR_TARGET)
2387
2388 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2389 # the named directory are copied to $(tooldir)/sys-include.
2390 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2391   if test x${is_cross_compiler} = xno ; then
2392     echo 1>&2 '***' --with-headers is only supported when cross compiling
2393     exit 1
2394   fi
2395   if test x"${with_headers}" != xyes ; then
2396     x=${gcc_cv_tool_prefix}
2397     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2398   fi
2399 fi
2400
2401 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2402 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2403 # are permitted.
2404 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2405   if test x${is_cross_compiler} = xno ; then
2406     echo 1>&2 '***' --with-libs is only supported when cross compiling
2407     exit 1
2408   fi
2409   if test x"${with_libs}" != xyes ; then
2410     # Copy the libraries in reverse order, so that files in the first named
2411     # library override files in subsequent libraries.
2412     x=${gcc_cv_tool_prefix}
2413     for l in ${with_libs}; do
2414       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2415     done
2416   fi
2417 fi
2418
2419 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2420 #
2421 # This is done by determining whether or not the appropriate directory
2422 # is available, and by checking whether or not specific configurations
2423 # have requested that this magic not happen.
2424 #
2425 # The command line options always override the explicit settings in
2426 # configure.ac, and the settings in configure.ac override this magic.
2427 #
2428 # If the default for a toolchain is to use GNU as and ld, and you don't
2429 # want to do that, then you should use the --without-gnu-as and
2430 # --without-gnu-ld options for the configure script.  Similarly, if
2431 # the default is to use the included zlib and you don't want to do that,
2432 # you should use the --with-system-zlib option for the configure script.
2433
2434 if test x${use_gnu_as} = x &&
2435    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2436   with_gnu_as=yes
2437   extra_host_args="$extra_host_args --with-gnu-as"
2438 fi
2439
2440 if test x${use_gnu_ld} = x &&
2441    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2442   with_gnu_ld=yes
2443   extra_host_args="$extra_host_args --with-gnu-ld"
2444 fi
2445
2446 if test x${use_included_zlib} = x &&
2447    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2448   :
2449 else
2450   with_system_zlib=yes
2451   extra_host_args="$extra_host_args --with-system-zlib"
2452 fi
2453
2454 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2455 # can detect this case.
2456
2457 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2458   with_newlib=yes
2459   extra_host_args="$extra_host_args --with-newlib"
2460 fi
2461
2462 # Handle ${copy_dirs}
2463 set fnord ${copy_dirs}
2464 shift
2465 while test $# != 0 ; do
2466   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2467     :
2468   else
2469     echo Copying $1 to $2
2470
2471     # Use the install script to create the directory and all required
2472     # parent directories.
2473     if test -d $2 ; then
2474       :
2475     else
2476       echo >config.temp
2477       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2478     fi
2479
2480     # Copy the directory, assuming we have tar.
2481     # FIXME: Should we use B in the second tar?  Not all systems support it.
2482     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2483
2484     # It is the responsibility of the user to correctly adjust all
2485     # symlinks.  If somebody can figure out how to handle them correctly
2486     # here, feel free to add the code.
2487
2488     echo $1 > $2/COPIED
2489   fi
2490   shift; shift
2491 done
2492
2493 # Determine a target-dependent exec_prefix that the installed
2494 # gcc will search in.  Keep this list sorted by triplet, with
2495 # the *-*-osname triplets last.
2496 md_exec_prefix=
2497 case "${target}" in
2498   i[[34567]]86-pc-msdosdjgpp*)
2499     md_exec_prefix=/dev/env/DJDIR/bin
2500     ;;
2501   *-*-hpux* | \
2502   *-*-nto-qnx* | \
2503   *-*-solaris2*)
2504     md_exec_prefix=/usr/ccs/bin
2505     ;;
2506 esac
2507
2508 extra_arflags_for_target=
2509 extra_nmflags_for_target=
2510 extra_ranlibflags_for_target=
2511 target_makefile_frag=/dev/null
2512 case "${target}" in
2513   spu-*-*)
2514     target_makefile_frag="config/mt-spu"
2515     ;;
2516   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2517     target_makefile_frag="config/mt-sde"
2518     ;;
2519   mipsisa*-*-elfoabi*)
2520     target_makefile_frag="config/mt-mips-elfoabi"
2521     ;;
2522   mips*-*-*linux* | mips*-*-gnu*)
2523     target_makefile_frag="config/mt-mips-gnu"
2524     ;;
2525   nios2-*-elf*)
2526     target_makefile_frag="config/mt-nios2-elf"
2527     ;;
2528   *-*-linux-android*)
2529     target_makefile_frag="config/mt-android"
2530     ;;
2531   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2532     target_makefile_frag="config/mt-gnu"
2533     ;;
2534   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2535     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2536     # commands to handle both 32-bit and 64-bit objects.  These flags are
2537     # harmless if we're using GNU nm or ar.
2538     extra_arflags_for_target=" -X32_64"
2539     extra_nmflags_for_target=" -B -X32_64"
2540     ;;
2541 esac
2542
2543 alphaieee_frag=/dev/null
2544 case $target in
2545   alpha*-*-*)
2546     # This just makes sure to use the -mieee option to build target libs.
2547     # This should probably be set individually by each library.
2548     alphaieee_frag="config/mt-alphaieee"
2549     ;;
2550 esac
2551
2552 # If --enable-target-optspace always use -Os instead of -O2 to build
2553 # the target libraries, similarly if it is not specified, use -Os
2554 # on selected platforms.
2555 ospace_frag=/dev/null
2556 case "${enable_target_optspace}:${target}" in
2557   yes:*)
2558     ospace_frag="config/mt-ospace"
2559     ;;
2560   :d30v-*)
2561     ospace_frag="config/mt-d30v"
2562     ;;
2563   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2564     ospace_frag="config/mt-ospace"
2565     ;;
2566   no:* | :*)
2567     ;;
2568   *)
2569     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2570     ;;
2571 esac
2572
2573 # Some systems (e.g., one of the i386-aix systems the gas testers are
2574 # using) don't handle "\$" correctly, so don't use it here.
2575 tooldir='${exec_prefix}'/${target_noncanonical}
2576 build_tooldir=${tooldir}
2577
2578 # Create a .gdbinit file which runs the one in srcdir
2579 # and tells GDB to look there for source files.
2580
2581 if test -r ${srcdir}/.gdbinit ; then
2582   case ${srcdir} in
2583     .) ;;
2584     *) cat > ./.gdbinit <<EOF
2585 # ${NO_EDIT}
2586 dir ${srcdir}
2587 dir .
2588 source ${srcdir}/.gdbinit
2589 EOF
2590     ;;
2591   esac
2592 fi
2593
2594 # Make sure that the compiler is able to generate an executable.  If it
2595 # can't, we are probably in trouble.  We don't care whether we can run the
2596 # executable--we might be using a cross compiler--we only care whether it
2597 # can be created.  At this point the main configure script has set CC.
2598 we_are_ok=no
2599 echo "int main () { return 0; }" > conftest.c
2600 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2601 if test $? = 0 ; then
2602   if test -s conftest || test -s conftest.exe ; then
2603     we_are_ok=yes
2604   fi
2605 fi
2606 case $we_are_ok in
2607   no)
2608     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2609     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2610     rm -f conftest*
2611     exit 1
2612     ;;
2613 esac
2614 rm -f conftest*
2615
2616 # Decide which environment variable is used to find dynamic libraries.
2617 case "${host}" in
2618   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2619   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2620   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2621   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2622 esac
2623
2624 # On systems where the dynamic library environment variable is PATH,
2625 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2626 # built executables to PATH.
2627 if test "$RPATH_ENVVAR" = PATH; then
2628   GCC_SHLIB_SUBDIR=/shlib
2629 else
2630   GCC_SHLIB_SUBDIR=
2631 fi
2632
2633 # Adjust the toplevel makefile according to whether bootstrap was selected.
2634 case $enable_bootstrap in
2635   yes)
2636     bootstrap_suffix=bootstrap
2637     BUILD_CONFIG=bootstrap-debug
2638     ;;
2639   no)
2640     bootstrap_suffix=no-bootstrap
2641     BUILD_CONFIG=
2642     ;;
2643 esac
2644
2645 AC_MSG_CHECKING(for default BUILD_CONFIG)
2646
2647 AC_ARG_WITH([build-config],
2648   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2649                   [use config/NAME.mk build configuration])],
2650   [case $with_build_config in
2651    yes) with_build_config= ;;
2652    no) with_build_config= BUILD_CONFIG= ;;
2653    esac])
2654
2655 if test "x${with_build_config}" != x; then
2656   BUILD_CONFIG=$with_build_config
2657 else
2658   case $BUILD_CONFIG in
2659   bootstrap-debug)
2660     if echo "int f (void) { return 0; }" > conftest.c &&
2661        ${CC} -c conftest.c &&
2662        mv conftest.o conftest.o.g0 &&
2663        ${CC} -c -g conftest.c &&
2664        mv conftest.o conftest.o.g &&
2665        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2666       :
2667     else
2668       BUILD_CONFIG=
2669     fi
2670     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2671     ;;
2672   esac
2673 fi
2674 AC_MSG_RESULT($BUILD_CONFIG)
2675 AC_SUBST(BUILD_CONFIG)
2676
2677 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2678 AC_MSG_CHECKING([for --enable-vtable-verify])
2679 AC_ARG_ENABLE(vtable-verify,
2680 [AS_HELP_STRING([--enable-vtable-verify],
2681                 [Enable vtable verification feature])],
2682 [case "$enableval" in
2683  yes) enable_vtable_verify=yes ;;
2684  no)  enable_vtable_verify=no ;;
2685  *)   enable_vtable_verify=no;;
2686  esac],
2687 [enable_vtable_verify=no])
2688 AC_MSG_RESULT($enable_vtable_verify)
2689
2690 # Record target_configdirs and the configure arguments for target and
2691 # build configuration in Makefile.
2692 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2693 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2694 bootstrap_fixincludes=no
2695
2696 # If we are building libgomp, bootstrap it.
2697 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2698   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2699 fi
2700
2701 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2702 # or bootstrap-ubsan, bootstrap it.
2703 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2704   case "$BUILD_CONFIG" in
2705     *bootstrap-asan* | *bootstrap-ubsan* )
2706       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2707       bootstrap_fixincludes=yes
2708       ;;
2709   esac
2710 fi
2711
2712 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2713 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2714    test "$enable_vtable_verify" != no; then
2715   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2716 fi
2717
2718 # Determine whether gdb needs tk/tcl or not.
2719 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2720 # and in that case we want gdb to be built without tk.  Ugh!
2721 # In fact I believe gdb is the *only* package directly dependent on tk,
2722 # so we should be able to put the 'maybe's in unconditionally and
2723 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2724 # 100% sure that that's safe though.
2725
2726 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2727 case "$enable_gdbtk" in
2728   no)
2729     GDB_TK="" ;;
2730   yes)
2731     GDB_TK="${gdb_tk}" ;;
2732   *)
2733     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2734     # distro.  Eventually someone will fix this and move Insight, nee
2735     # gdbtk to a separate directory.
2736     if test -d ${srcdir}/gdb/gdbtk ; then
2737       GDB_TK="${gdb_tk}"
2738     else
2739       GDB_TK=""
2740     fi
2741     ;;
2742 esac
2743 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2744 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2745
2746 # Strip out unwanted targets.
2747
2748 # While at that, we remove Makefiles if we were started for recursive
2749 # configuration, so that the top-level Makefile reconfigures them,
2750 # like we used to do when configure itself was recursive.
2751
2752 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2753 # but now we're fixing up the Makefile ourselves with the additional
2754 # commands passed to AC_CONFIG_FILES.  Use separate variables
2755 # extrasub-{build,host,target} not because there is any reason to split
2756 # the substitutions up that way, but only to remain below the limit of
2757 # 99 commands in a script, for HP-UX sed.
2758
2759 # Do not nest @if/@endif or @unless/@endunless pairs, because
2760 # configure will not warn you at all.
2761
2762 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2763   yes:yes:*\ gold\ *:*,c++,*) ;;
2764   yes:yes:*\ gold\ *:*)
2765     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2766     ;;
2767 esac
2768
2769 extrasub_build=
2770 for module in ${build_configdirs} ; do
2771   if test -z "${no_recursion}" \
2772      && test -f ${build_subdir}/${module}/Makefile; then
2773     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2774     rm -f ${build_subdir}/${module}/Makefile
2775   fi
2776   extrasub_build="$extrasub_build
2777 /^@if build-$module\$/d
2778 /^@endif build-$module\$/d
2779 /^@unless build-$module\$/,/^@endunless build-$module\$/d
2780 /^@if build-$module-$bootstrap_suffix\$/d
2781 /^@endif build-$module-$bootstrap_suffix\$/d
2782 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
2783 done
2784 extrasub_host=
2785 for module in ${configdirs} ; do
2786   if test -z "${no_recursion}"; then
2787     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2788       if test -f ${file}; then
2789         echo 1>&2 "*** removing ${file} to force reconfigure"
2790         rm -f ${file}
2791       fi
2792     done
2793   fi
2794   case ${module},${bootstrap_fixincludes} in
2795     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2796     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2797   esac
2798   extrasub_host="$extrasub_host
2799 /^@if $module\$/d
2800 /^@endif $module\$/d
2801 /^@unless $module\$/,/^@endunless $module\$/d
2802 /^@if $module-$host_bootstrap_suffix\$/d
2803 /^@endif $module-$host_bootstrap_suffix\$/d
2804 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
2805 done
2806 extrasub_target=
2807 for module in ${target_configdirs} ; do
2808   if test -z "${no_recursion}" \
2809      && test -f ${target_subdir}/${module}/Makefile; then
2810     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2811     rm -f ${target_subdir}/${module}/Makefile
2812   fi
2813
2814   # We only bootstrap target libraries listed in bootstrap_target_libs.
2815   case $bootstrap_target_libs in
2816     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2817     *) target_bootstrap_suffix=no-bootstrap ;;
2818   esac
2819
2820   extrasub_target="$extrasub_target
2821 /^@if target-$module\$/d
2822 /^@endif target-$module\$/d
2823 /^@unless target-$module\$/,/^@endunless target-$module\$/d
2824 /^@if target-$module-$target_bootstrap_suffix\$/d
2825 /^@endif target-$module-$target_bootstrap_suffix\$/d
2826 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
2827 done
2828
2829 # Do the final fixup along with target modules.
2830 extrasub_target="$extrasub_target
2831 /^@if /,/^@endif /d
2832 /^@unless /d
2833 /^@endunless /d"
2834
2835 # Create the serialization dependencies.  This uses a temporary file.
2836
2837 AC_ARG_ENABLE([serial-configure],
2838 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
2839                 [force sequential configuration of
2840                  sub-packages for the host, target or build
2841                  machine, or all sub-packages])])
2842
2843 case ${enable_serial_configure} in
2844   yes)
2845     enable_serial_build_configure=yes
2846     enable_serial_host_configure=yes
2847     enable_serial_target_configure=yes
2848     ;;
2849 esac
2850
2851 # These force 'configure's to be done one at a time, to avoid problems
2852 # with contention over a shared config.cache.
2853 rm -f serdep.tmp
2854 echo '# serdep.tmp' > serdep.tmp
2855 olditem=
2856 test "x${enable_serial_build_configure}" = xyes &&
2857 for item in ${build_configdirs} ; do
2858   case ${olditem} in
2859     "") ;;
2860     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
2861   esac
2862   olditem=${item}
2863 done
2864 olditem=
2865 test "x${enable_serial_host_configure}" = xyes &&
2866 for item in ${configdirs} ; do
2867   case ${olditem} in
2868     "") ;;
2869     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
2870   esac
2871   olditem=${item}
2872 done
2873 olditem=
2874 test "x${enable_serial_target_configure}" = xyes &&
2875 for item in ${target_configdirs} ; do
2876   case ${olditem} in
2877     "") ;;
2878     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
2879   esac
2880   olditem=${item}
2881 done
2882 serialization_dependencies=serdep.tmp
2883 AC_SUBST_FILE(serialization_dependencies)
2884
2885 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
2886 # target, nonopt, and variable assignments.  These are the ones we
2887 # might not want to pass down to subconfigures.  The exception being
2888 # --cache-file=/dev/null, which is used to turn off the use of cache
2889 # files altogether, and which should be passed on to subconfigures.
2890 # Also strip program-prefix, program-suffix, and program-transform-name,
2891 # so that we can pass down a consistent program-transform-name.
2892 baseargs=
2893 tbaseargs=
2894 keep_next=no
2895 skip_next=no
2896 eval "set -- $ac_configure_args"
2897 for ac_arg
2898 do
2899   if test X"$skip_next" = X"yes"; then
2900     skip_next=no
2901     continue
2902   fi
2903   if test X"$keep_next" = X"yes"; then
2904     case $ac_arg in
2905       *\'*)
2906         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2907     esac
2908     baseargs="$baseargs '$ac_arg'"
2909     tbaseargs="$tbaseargs '$ac_arg'"
2910     keep_next=no
2911     continue
2912   fi
2913
2914   # Handle separated arguments.  Based on the logic generated by
2915   # autoconf 2.59.
2916   case $ac_arg in
2917     *=* | --config-cache | -C | -disable-* | --disable-* \
2918       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
2919       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
2920       | -with-* | --with-* | -without-* | --without-* | --x)
2921       separate_arg=no
2922       ;;
2923     -*)
2924       separate_arg=yes
2925       ;;
2926     *)
2927       separate_arg=no
2928       ;;
2929   esac
2930
2931   skip_targ=no
2932   case $ac_arg in
2933 changequote(,)
2934   --with-* | --without-*)
2935     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
2936
2937     case $libopt in
2938     *[-_]include)
2939       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
2940       ;;
2941     *[-_]lib)
2942       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
2943       ;;
2944     *)
2945       lib=$libopt
2946       ;;
2947     esac
2948 changequote([,])
2949
2950     case $lib in
2951     mpc | mpfr | gmp | isl)
2952       # If we're processing --with-$lib, --with-$lib-include or
2953       # --with-$lib-lib, for one of the libs above, and target is
2954       # different from host, don't pass the current argument to any
2955       # target library's configure.
2956       if test x$is_cross_compiler = xyes; then
2957         skip_targ=yes
2958       fi
2959       ;;
2960     esac
2961     ;;
2962   esac
2963
2964   case "$ac_arg" in
2965     --cache-file=/dev/null | \
2966     -cache-file=/dev/null )
2967       # Handled here to avoid the test to skip args below.
2968       baseargs="$baseargs '$ac_arg'"
2969       tbaseargs="$tbaseargs '$ac_arg'"
2970       # Assert: $separate_arg should always be no.
2971       keep_next=$separate_arg
2972       ;;
2973     --no*)
2974       continue
2975       ;;
2976     --c* | \
2977     --sr* | \
2978     --ho* | \
2979     --bu* | \
2980     --t* | \
2981     --program-* | \
2982     -cache_file* | \
2983     -srcdir* | \
2984     -host* | \
2985     -build* | \
2986     -target* | \
2987     -program-prefix* | \
2988     -program-suffix* | \
2989     -program-transform-name* )
2990       skip_next=$separate_arg
2991       continue
2992       ;;
2993     -*)
2994       # An option.  Add it.
2995       case $ac_arg in
2996         *\'*)
2997           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2998       esac
2999       baseargs="$baseargs '$ac_arg'"
3000       if test X"$skip_targ" = Xno; then
3001         tbaseargs="$tbaseargs '$ac_arg'"
3002       fi
3003       keep_next=$separate_arg
3004       ;;
3005     *)
3006       # Either a variable assignment, or a nonopt (triplet).  Don't
3007       # pass it down; let the Makefile handle this.
3008       continue
3009       ;;
3010   esac
3011 done
3012 # Remove the initial space we just introduced and, as these will be
3013 # expanded by make, quote '$'.
3014 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3015
3016 # Add in --program-transform-name, after --program-prefix and
3017 # --program-suffix have been applied to it.  Autoconf has already
3018 # doubled dollar signs and backslashes in program_transform_name; we want
3019 # the backslashes un-doubled, and then the entire thing wrapped in single
3020 # quotes, because this will be expanded first by make and then by the shell.
3021 # Also, because we want to override the logic in subdir configure scripts to
3022 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3023 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3024 ${program_transform_name}
3025 EOF_SED
3026 gcc_transform_name=`cat conftestsed.out`
3027 rm -f conftestsed.out
3028 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3029 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3030 if test "$silent" = yes; then
3031   baseargs="$baseargs --silent"
3032   tbaseargs="$tbaseargs --silent"
3033 fi
3034 baseargs="$baseargs --disable-option-checking"
3035 tbaseargs="$tbaseargs --disable-option-checking"
3036
3037 # Record and document user additions to sub configure arguments.
3038 AC_ARG_VAR([build_configargs],
3039            [additional configure arguments for build directories])
3040 AC_ARG_VAR([host_configargs],
3041            [additional configure arguments for host directories])
3042 AC_ARG_VAR([target_configargs],
3043            [additional configure arguments for target directories])
3044
3045 # For the build-side libraries, we just need to pretend we're native,
3046 # and not use the same cache file.  Multilibs are neither needed nor
3047 # desired.  We can't even use the same cache file for all build-side
3048 # libraries, as they're compiled differently; some with C, some with
3049 # C++ or with different feature-enabling options.
3050 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3051
3052 # For host modules, accept cache file option, or specification as blank.
3053 case "${cache_file}" in
3054 "") # empty
3055   cache_file_option="" ;;
3056 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3057   cache_file_option="--cache-file=${cache_file}" ;;
3058 *) # relative path
3059   cache_file_option="--cache-file=../${cache_file}" ;;
3060 esac
3061
3062 # Host dirs don't like to share a cache file either, horribly enough.
3063 # This seems to be due to autoconf 2.5x stupidity.
3064 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3065
3066 target_configargs="$target_configargs ${tbaseargs}"
3067
3068 # Passing a --with-cross-host argument lets the target libraries know
3069 # whether they are being built with a cross-compiler or being built
3070 # native.  However, it would be better to use other mechanisms to make the
3071 # sorts of decisions they want to make on this basis.  Please consider
3072 # this option to be deprecated.  FIXME.
3073 if test x${is_cross_compiler} = xyes ; then
3074   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3075 fi
3076
3077 # Special user-friendly check for native x86_64-linux build, if
3078 # multilib is not explicitly enabled.
3079 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3080   x86_64-*linux*:yes:$build:$build:)
3081     # Make sure we have a development environment that handles 32-bit
3082     dev64=no
3083     echo "int main () { return 0; }" > conftest.c
3084     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3085     if test $? = 0 ; then
3086       if test -s conftest || test -s conftest.exe ; then
3087         dev64=yes
3088       fi
3089     fi
3090     rm -f conftest*
3091     if test x${dev64} != xyes ; then
3092       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.])
3093     fi
3094     ;;
3095 esac
3096
3097 # Default to --enable-multilib.
3098 if test x${enable_multilib} = x ; then
3099   target_configargs="--enable-multilib ${target_configargs}"
3100 fi
3101
3102 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3103 # changed from the earlier setting of with_newlib.
3104 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3105   target_configargs="--with-newlib ${target_configargs}"
3106 fi
3107
3108 # Different target subdirs use different values of certain variables
3109 # (notably CXX).  Worse, multilibs use *lots* of different values.
3110 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3111 # it doesn't automatically accept command-line overrides of them.
3112 # This means it's not safe for target subdirs to share a cache file,
3113 # which is disgusting, but there you have it.  Hopefully this can be
3114 # fixed in future.  It's still worthwhile to use a cache file for each
3115 # directory.  I think.
3116
3117 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3118 # We need to pass --target, as newer autoconf's requires consistency
3119 # for target_alias and gcc doesn't manage it consistently.
3120 target_configargs="--cache-file=./config.cache ${target_configargs}"
3121
3122 FLAGS_FOR_TARGET=
3123 case " $target_configdirs " in
3124  *" newlib "*)
3125   case " $target_configargs " in
3126   *" --with-newlib "*)
3127    case "$target" in
3128     *-cygwin*)
3129       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3130       ;;
3131    esac
3132
3133    # If we're not building GCC, don't discard standard headers.
3134    if test -d ${srcdir}/gcc; then
3135      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3136
3137      if test "${build}" != "${host}"; then
3138        # On Canadian crosses, CC_FOR_TARGET will have already been set
3139        # by `configure', so we won't have an opportunity to add -Bgcc/
3140        # to it.  This is right: we don't want to search that directory
3141        # for binaries, but we want the header files in there, so add
3142        # them explicitly.
3143        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3144
3145        # Someone might think of using the pre-installed headers on
3146        # Canadian crosses, in case the installed compiler is not fully
3147        # compatible with the compiler being built.  In this case, it
3148        # would be better to flag an error than risking having
3149        # incompatible object files being constructed.  We can't
3150        # guarantee that an error will be flagged, but let's hope the
3151        # compiler will do it, when presented with incompatible header
3152        # files.
3153      fi
3154    fi
3155
3156    case "${target}-${is_cross_compiler}" in
3157    i[[3456789]]86-*-linux*-no)
3158       # Here host == target, so we don't need to build gcc,
3159       # so we don't want to discard standard headers.
3160       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3161       ;;
3162    *)
3163       # If we're building newlib, use its generic headers last, but search
3164       # for any libc-related directories first (so make it the last -B
3165       # switch).
3166       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3167
3168       # If we're building libgloss, find the startup file, simulator library
3169       # and linker script.
3170       case " $target_configdirs " in
3171         *" libgloss "*)
3172         # Look for startup file, simulator library and maybe linker script.
3173         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3174         # Look for libnosys.a in case the target needs it.
3175         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3176         # Most targets have the linker script in the source directory.
3177         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3178         ;;
3179       esac
3180       ;;
3181    esac
3182    ;;
3183   esac
3184   ;;
3185 esac
3186
3187 case "$target" in
3188   x86_64-*mingw* | *-w64-mingw*)
3189   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3190   # however, use a symlink named 'mingw' in ${prefix} .
3191     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3192     ;;
3193   *-mingw*)
3194   # MinGW can't be handled as Cygwin above since it does not use newlib.
3195     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3196     ;;
3197 esac
3198
3199 # Allow the user to override the flags for
3200 # our build compiler if desired.
3201 if test x"${build}" = x"${host}" ; then
3202   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3203   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3204   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3205 fi
3206
3207 # On Canadian crosses, we'll be searching the right directories for
3208 # the previously-installed cross compiler, so don't bother to add
3209 # flags for directories within the install tree of the compiler
3210 # being built; programs in there won't even run.
3211 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3212   # Search for pre-installed headers if nothing else fits.
3213   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3214 fi
3215
3216 if test "x${use_gnu_ld}" = x &&
3217    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3218   # Arrange for us to find uninstalled linker scripts.
3219   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3220 fi
3221
3222 # Search for other target-specific linker scripts and such.
3223 case "${target}" in
3224   mep*)
3225     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3226     ;;
3227 esac
3228
3229 # Makefile fragments.
3230 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3231 do
3232   eval fragval=\$$frag
3233   if test $fragval != /dev/null; then
3234     eval $frag=${srcdir}/$fragval
3235   fi
3236 done
3237 AC_SUBST_FILE(host_makefile_frag)
3238 AC_SUBST_FILE(target_makefile_frag)
3239 AC_SUBST_FILE(alphaieee_frag)
3240 AC_SUBST_FILE(ospace_frag)
3241
3242 # Miscellanea: directories, flags, etc.
3243 AC_SUBST(RPATH_ENVVAR)
3244 AC_SUBST(GCC_SHLIB_SUBDIR)
3245 AC_SUBST(tooldir)
3246 AC_SUBST(build_tooldir)
3247 AC_SUBST(CONFIGURE_GDB_TK)
3248 AC_SUBST(GDB_TK)
3249 AC_SUBST(INSTALL_GDB_TK)
3250
3251 # Build module lists & subconfigure args.
3252 AC_SUBST(build_configargs)
3253 AC_SUBST(build_configdirs)
3254
3255 # Host module lists & subconfigure args.
3256 AC_SUBST(host_configargs)
3257 AC_SUBST(configdirs)
3258 AC_SUBST(target_configdirs)
3259
3260 # Target module lists & subconfigure args.
3261 AC_SUBST(target_configargs)
3262
3263
3264 # Build tools.
3265 AC_SUBST(AR_FOR_BUILD)
3266 AC_SUBST(AS_FOR_BUILD)
3267 AC_SUBST(CC_FOR_BUILD)
3268 AC_SUBST(CFLAGS_FOR_BUILD)
3269 AC_SUBST(CXXFLAGS_FOR_BUILD)
3270 AC_SUBST(CXX_FOR_BUILD)
3271 AC_SUBST(DLLTOOL_FOR_BUILD)
3272 AC_SUBST(GFORTRAN_FOR_BUILD)
3273 AC_SUBST(GOC_FOR_BUILD)
3274 AC_SUBST(GDC_FOR_BUILD)
3275 AC_SUBST(LDFLAGS_FOR_BUILD)
3276 AC_SUBST(LD_FOR_BUILD)
3277 AC_SUBST(NM_FOR_BUILD)
3278 AC_SUBST(RANLIB_FOR_BUILD)
3279 AC_SUBST(WINDMC_FOR_BUILD)
3280 AC_SUBST(WINDRES_FOR_BUILD)
3281
3282 # Generate default definitions for YACC, M4, LEX and other programs that run
3283 # on the build machine.  These are used if the Makefile can't locate these
3284 # programs in objdir.
3285 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3286
3287 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3288 case " $build_configdirs " in
3289   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3290 esac
3291
3292 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3293 case " $build_configdirs " in
3294   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3295 esac
3296
3297 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3298 case " $build_configdirs " in
3299   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3300 esac
3301
3302 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3303 case " $build_configdirs " in
3304   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3305   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3306 esac
3307
3308 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3309 case " $build_configdirs " in
3310   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3311 esac
3312
3313 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3314 case " $build_configdirs " in
3315   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3316   *)
3317 changequote(,)
3318     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3319     # higher, else we use the "missing" dummy.
3320     if ${MAKEINFO} --version \
3321        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3322       :
3323     else
3324       MAKEINFO="$MISSING makeinfo"
3325     fi
3326     ;;
3327 changequote([,])
3328 esac
3329
3330 # FIXME: expect and dejagnu may become build tools?
3331
3332 AC_CHECK_PROGS(EXPECT, expect, expect)
3333 case " $configdirs " in
3334   *" expect "*)
3335     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3336     ;;
3337 esac
3338
3339 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3340 case " $configdirs " in
3341   *" dejagnu "*)
3342     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3343     ;;
3344 esac
3345
3346
3347 # Host tools.
3348 NCN_STRICT_CHECK_TOOLS(AR, ar)
3349 NCN_STRICT_CHECK_TOOLS(AS, as)
3350 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3351 NCN_STRICT_CHECK_TOOLS(LD, ld)
3352 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3353 NCN_STRICT_CHECK_TOOLS(NM, nm)
3354 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3355 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3356 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3357 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3358 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3359 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3360 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3361 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3362 AC_SUBST(CC)
3363 AC_SUBST(CXX)
3364 AC_SUBST(CFLAGS)
3365 AC_SUBST(CXXFLAGS)
3366
3367 # Target tools.
3368 AC_ARG_WITH([build-time-tools],
3369   [AS_HELP_STRING([--with-build-time-tools=PATH],
3370                   [use given path to find target tools during the build])],
3371   [case x"$withval" in
3372      x/*) ;;
3373      *)
3374        with_build_time_tools=
3375        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3376        ;;
3377    esac],
3378   [with_build_time_tools=])
3379
3380 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3381 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3382 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3383 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3384 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3385 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3386
3387 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3388 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3389 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3390 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3391 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3392 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3393 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3394 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3395 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3396 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3397 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3398 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3399 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3400 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3401
3402 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3403
3404 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3405 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3406 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3407 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3408 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3409                 [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],
3410                 c++)
3411 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3412                 [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],
3413                 c++)
3414 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3415 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3416 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3417                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3418 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3419                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3420 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3421                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3422 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3423 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3424 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3425 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3426 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3427 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3428 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3429 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3430 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3431 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3432 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3433
3434 AC_SUBST(FLAGS_FOR_TARGET)
3435 AC_SUBST(RAW_CXX_FOR_TARGET)
3436
3437 # Certain tools may need extra flags.
3438 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3439 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3440 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3441
3442 # When building target libraries, except in a Canadian cross, we use
3443 # the same toolchain as the compiler we just built.
3444 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3445 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3446 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3447 if test $host = $build; then
3448   case " $configdirs " in
3449     *" gcc "*)
3450       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3451       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3452       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3453       ;;
3454   esac
3455 fi
3456
3457 AC_SUBST(COMPILER_AS_FOR_TARGET)
3458 AC_SUBST(COMPILER_LD_FOR_TARGET)
3459 AC_SUBST(COMPILER_NM_FOR_TARGET)
3460
3461 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3462 AC_ARG_ENABLE(maintainer-mode,
3463 [AS_HELP_STRING([--enable-maintainer-mode],
3464                 [enable make rules and dependencies not useful
3465                  (and sometimes confusing) to the casual installer])],
3466       USE_MAINTAINER_MODE=$enableval,
3467       USE_MAINTAINER_MODE=no)
3468 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3469 AC_SUBST(MAINTAINER_MODE_TRUE)
3470 AC_SUBST(MAINTAINER_MODE_FALSE)
3471 if test "$USE_MAINTAINER_MODE" = yes; then
3472   MAINTAINER_MODE_TRUE=
3473   MAINTAINER_MODE_FALSE='#'
3474 else
3475   MAINTAINER_MODE_TRUE='#'
3476   MAINTAINER_MODE_FALSE=
3477 fi
3478 MAINT=$MAINTAINER_MODE_TRUE
3479 AC_SUBST(MAINT)dnl
3480
3481 # ---------------------
3482 # GCC bootstrap support
3483 # ---------------------
3484
3485 # Stage specific cflags for build.
3486 stage1_cflags="-g"
3487 case $build in
3488   vax-*-*)
3489     case ${GCC} in
3490       yes) stage1_cflags="-g -Wa,-J" ;;
3491       *) stage1_cflags="-g -J" ;;
3492     esac ;;
3493 esac
3494
3495 AC_SUBST(stage1_cflags)
3496
3497 # Enable --enable-checking in stage1 of the compiler.
3498 AC_ARG_ENABLE(stage1-checking,
3499 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3500                 [choose additional checking for stage1 of the compiler])],
3501 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3502 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3503   # For --disable-checking or implicit --enable-checking=release, avoid
3504   # setting --enable-checking=gc in the default stage1 checking for LTO
3505   # bootstraps.  See PR62077.
3506   case $BUILD_CONFIG in
3507     *lto*)
3508       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3509     *)
3510       stage1_checking=--enable-checking=yes,types;;
3511   esac
3512   if test "x$enable_checking" = x && \
3513      test -d ${srcdir}/gcc && \
3514      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3515     stage1_checking=--enable-checking=yes,types,extra
3516   fi
3517 else
3518   stage1_checking=--enable-checking=$enable_checking,types
3519 fi])
3520 AC_SUBST(stage1_checking)
3521
3522 # Enable -Werror in bootstrap stage2 and later.
3523 AC_ARG_ENABLE(werror,
3524 [AS_HELP_STRING([--enable-werror],
3525                 [enable -Werror in bootstrap stage2 and later])],
3526 [
3527 case ${enable_werror} in
3528   yes) stage2_werror_flag="--enable-werror-always" ;;
3529   *) stage2_werror_flag="" ;;
3530 esac
3531 ],
3532 [
3533 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3534   case $BUILD_CONFIG in
3535   bootstrap-debug)
3536       stage2_werror_flag="--enable-werror-always" ;;
3537   "")
3538       stage2_werror_flag="--enable-werror-always" ;;
3539   esac
3540 fi
3541 ])
3542
3543 AC_SUBST(stage2_werror_flag)
3544
3545 # Specify what files to not compare during bootstrap.
3546
3547 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3548 case "$target" in
3549   hppa*64*-*-hpux*) ;;
3550   hppa*-*-hpux*) compare_exclusions="gcc/cc*-checksum\$(objext) | */libgcc/lib2funcs* | gcc/ada/*tools/* | gcc/function-tests.o" ;;
3551   powerpc*-ibm-aix*) compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/* | *libgomp*\$(objext)" ;;
3552 esac
3553 AC_SUBST(compare_exclusions)
3554
3555 AC_CONFIG_FILES([Makefile],
3556   [sed "$extrasub_build" Makefile |
3557    sed "$extrasub_host" |
3558    sed "$extrasub_target" > mf$$
3559    mv -f mf$$ Makefile],
3560   [extrasub_build="$extrasub_build"
3561    extrasub_host="$extrasub_host"
3562    extrasub_target="$extrasub_target"])
3563 AC_OUTPUT