configure.ac

   1 #   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2 #   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012,
   3 #   2014, 2015, 2016 Free Software Foundation, Inc.
   4 #
   5 # This file is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  18
  19 ##############################################################################
  20 ### WARNING: this file contains embedded tabs.  Do not run untabify on this file.
  21
  22 m4_include(config/acx.m4)
  23 m4_include(config/override.m4)
  24 m4_include(config/proginstall.m4)
  25 m4_include(config/elf.m4)
  26 m4_include([libtool.m4])
  27 m4_include([ltoptions.m4])
  28 m4_include([ltsugar.m4])
  29 m4_include([ltversion.m4])
  30 m4_include([lt~obsolete.m4])
  31 m4_include([config/isl.m4])
  32
  33 AC_INIT(move-if-change)
  34 AC_PREREQ(2.64)
  35 AC_DISABLE_OPTION_CHECKING
  36
  37 progname=$0
  38 # if PWD already has a value, it is probably wrong.
  39 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  40
  41 # Export original configure arguments for use by sub-configures.
  42 # Quote arguments with shell meta charatcers.
  43 TOPLEVEL_CONFIGURE_ARGUMENTS=
  44 set -- "$progname" "$@"
  45 for ac_arg
  46 do
  47   case "$ac_arg" in
  48   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  49     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  50     # if the argument is of the form -foo=baz, quote the baz part only
  51     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  52   *) ;;
  53   esac
  54   # Add the quoted argument to the list.
  55   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  56 done
  57 if test "$silent" = yes; then
  58   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  59 fi
  60 # Remove the initial space we just introduced and, as these will be
  61 # expanded by make, quote '$'.
  62 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  63 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  64
  65 # Find the build, host, and target systems.
  66 ACX_NONCANONICAL_BUILD
  67 ACX_NONCANONICAL_HOST
  68 ACX_NONCANONICAL_TARGET
  69
  70 dnl Autoconf 2.5x and later will set a default program prefix if
  71 dnl --target was used, even if it was the same as --host.  Disable
  72 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  73 dnl to take effect.
  74 test "$host_noncanonical" = "$target_noncanonical" &&
  75   test "$program_prefix$program_suffix$program_transform_name" = \
  76     NONENONEs,x,x, &&
  77   program_transform_name=s,y,y,
  78
  79 AC_CANONICAL_SYSTEM
  80 AC_ARG_PROGRAM
  81
  82 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  83 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  84
  85 # Get 'install' or 'install-sh' and its variants.
  86 AC_PROG_INSTALL
  87 ACX_PROG_LN
  88 AC_PROG_LN_S
  89 AC_PROG_SED
  90 AC_PROG_AWK
  91
  92 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  93
  94 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  95 # a relative path.
  96 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  97   INSTALL="${srcpwd}/install-sh -c"
  98 fi
  99
 100 # Set srcdir to "." if that's what it is.
 101 # This is important for multilib support.
 102 pwd=`${PWDCMD-pwd}`
 103 if test "${pwd}" = "${srcpwd}" ; then
 104   srcdir=.
 105 fi
 106
 107 topsrcdir=$srcpwd
 108
 109 extra_host_args=
 110
 111 ### To add a new directory to the tree, first choose whether it is a target
 112 ### or a host dependent tool.  Then put it into the appropriate list
 113 ### (library or tools, host or target), doing a dependency sort.
 114
 115 # Subdirs will be configured in the order listed in build_configdirs,
 116 # configdirs, or target_configdirs; see the serialization section below.
 117
 118 # Dependency sorting is only needed when *configuration* must be done in
 119 # a particular order.  In all cases a dependency should be specified in
 120 # the Makefile, whether or not it's implicitly specified here.
 121
 122 # Double entries in build_configdirs, configdirs, or target_configdirs may
 123 # cause circular dependencies and break everything horribly.
 124
 125 # these library is used by various programs built for the build
 126 # environment
 127 #
 128 build_libs="build-libiberty build-libcpp"
 129
 130 # these tools are built for the build environment
 131 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 132
 133 # these libraries are used by various programs built for the host environment
 134 #f
 135 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libdecnumber gmp mpfr mpc isl libelf libiconv"
 136
 137 # these tools are built for the host environment
 138 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 139 # know that we are building the simulator.
 140 # binutils, gas and ld appear in that order because it makes sense to run
 141 # "make check" in that particular order.
 142 # If --enable-gold is used, "gold" may replace "ld".
 143 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools"
 144
 145 # these libraries are built for the target environment, and are built after
 146 # the host libraries and the host tools (which may be a cross compiler)
 147 # Note that libiberty is not a target library.
 148 target_libraries="target-libgcc \
 149                 target-libbacktrace \
 150                 target-libgloss \
 151                 target-newlib \
 152                 target-libgomp \
 153                 target-libcilkrts \
 154                 target-liboffloadmic \
 155                 target-libhsail-rt \
 156                 target-libatomic \
 157                 target-libitm \
 158                 target-libstdc++-v3 \
 159                 target-libsanitizer \
 160                 target-libvtv \
 161                 target-libmpx \
 162                 target-libssp \
 163                 target-libquadmath \
 164                 target-libgfortran \
 165                 target-libffi \
 166                 target-libobjc \
 167                 target-libada \
 168                 target-libgo"
 169
 170 # these tools are built using the target libraries, and are intended to
 171 # run only in the target environment
 172 #
 173 # note: any program that *uses* libraries that are in the "target_libraries"
 174 # list belongs in this list.
 175 #
 176 target_tools="target-rda"
 177
 178 ################################################################################
 179
 180 ## All tools belong in one of the four categories, and are assigned above
 181 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 182 ## is important because configure will choke if they ever get through.
 183 ## ${configdirs} is directories we build using the host tools.
 184 ## ${target_configdirs} is directories we build using the target tools.
 185 configdirs=`echo ${host_libs} ${host_tools}`
 186 target_configdirs=`echo ${target_libraries} ${target_tools}`
 187 build_configdirs=`echo ${build_libs} ${build_tools}`
 188
 189 m4_divert_text([PARSE_ARGS],
 190 [case $srcdir in
 191   *" "*)
 192 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 193     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 194 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 195     ;;
 196 esac
 197 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 198 ])
 199
 200 ################################################################################
 201
 202 srcname="gnu development package"
 203
 204 # This gets set non-empty for some net releases of packages.
 205 appdirs=""
 206
 207 # Define is_cross_compiler to save on calls to 'test'.
 208 is_cross_compiler=
 209 if test x"${host}" = x"${target}" ; then
 210   is_cross_compiler=no
 211 else
 212   is_cross_compiler=yes
 213 fi
 214
 215 # Find the build and target subdir names.
 216 GCC_TOPLEV_SUBDIRS
 217 # Be sure to cover against remnants of an in-tree build.
 218 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 219   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 220 Use a pristine source tree when building in a separate tree])
 221 fi
 222
 223 # Skipdirs are removed silently.
 224 skipdirs=
 225 # Noconfigdirs are removed loudly.
 226 noconfigdirs=""
 227
 228 use_gnu_ld=
 229 # Make sure we don't let GNU ld be added if we didn't want it.
 230 if test x$with_gnu_ld = xno ; then
 231   use_gnu_ld=no
 232   noconfigdirs="$noconfigdirs ld gold"
 233 fi
 234
 235 use_gnu_as=
 236 # Make sure we don't let GNU as be added if we didn't want it.
 237 if test x$with_gnu_as = xno ; then
 238   use_gnu_as=no
 239   noconfigdirs="$noconfigdirs gas"
 240 fi
 241
 242 use_included_zlib=
 243 AC_ARG_WITH(system-zlib,
 244 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 245 # Make sure we don't let ZLIB be added if we didn't want it.
 246 if test x$with_system_zlib = xyes ; then
 247   use_included_zlib=no
 248   noconfigdirs="$noconfigdirs zlib"
 249 fi
 250
 251 # some tools are so dependent upon X11 that if we're not building with X,
 252 # it's not even worth trying to configure, much less build, that tool.
 253
 254 case ${with_x} in
 255   yes | "") ;; # the default value for this tree is that X11 is available
 256   no)
 257     skipdirs="${skipdirs} tk itcl libgui"
 258     # We won't be able to build gdbtk without X.
 259     enable_gdbtk=no
 260     ;;
 261   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 262 esac
 263
 264 # Some are only suitable for cross toolchains.
 265 # Remove these if host=target.
 266 cross_only="target-libgloss target-newlib target-opcodes"
 267
 268 case $is_cross_compiler in
 269   no) skipdirs="${skipdirs} ${cross_only}" ;;
 270 esac
 271
 272 # If both --with-headers and --with-libs are specified, default to
 273 # --without-newlib.
 274 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 275    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 276   if test x"${with_newlib}" = x ; then
 277     with_newlib=no
 278   fi
 279 fi
 280
 281 # Recognize --with-newlib/--without-newlib.
 282 case ${with_newlib} in
 283   no) skipdirs="${skipdirs} target-newlib" ;;
 284   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 285 esac
 286
 287 AC_ARG_ENABLE(as-accelerator-for,
 288 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 289                 [build as offload target compiler.
 290                 Specify offload host triple by ARG])])
 291
 292 AC_ARG_ENABLE(offload-targets,
 293 [AS_HELP_STRING([--enable-offload-targets=LIST],
 294                 [enable offloading to devices from comma-separated LIST of
 295                 TARGET[=DIR]. Use optional path to find offload target compiler
 296                 during the build])],
 297 [
 298   if test x"$enable_offload_targets" = x; then
 299     AC_MSG_ERROR([no offload targets specified])
 300   fi
 301 ], [enable_offload_targets=])
 302
 303 # Handle --enable-gold, --enable-ld.
 304 # --disable-gold [--enable-ld]
 305 #     Build only ld.  Default option.
 306 # --enable-gold [--enable-ld]
 307 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 308 #     as "ld.bfd" and "ld".
 309 # --enable-gold=default [--enable-ld]
 310 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 311 #     install ld as "ld.bfd".
 312 # --enable-gold[=default] --disable-ld
 313 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 314 # --enable-gold --enable-ld=default
 315 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 316 #     and ld.bfd).
 317 #     In other words, ld is default
 318 # --enable-gold=default --enable-ld=default
 319 #     Error.
 320
 321 default_ld=
 322 AC_ARG_ENABLE(gold,
 323 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 324                 [build gold @<:@ARG={default,yes,no}@:>@])],
 325 ENABLE_GOLD=$enableval,
 326 ENABLE_GOLD=no)
 327 case "${ENABLE_GOLD}" in
 328   yes|default)
 329     # Check for ELF target.
 330     is_elf=no
 331     case "${target}" in
 332       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 333       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 334       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 335       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 336         case "${target}" in
 337           *-*-linux*aout* | *-*-linux*oldld*)
 338             ;;
 339           *)
 340             is_elf=yes
 341             ;;
 342         esac
 343     esac
 344
 345     if test "$is_elf" = "yes"; then
 346       # Check for target supported by gold.
 347       case "${target}" in
 348         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 349         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-*)
 350           configdirs="$configdirs gold"
 351           if test x${ENABLE_GOLD} = xdefault; then
 352             default_ld=gold
 353           fi
 354           ENABLE_GOLD=yes
 355           ;;
 356       esac
 357     fi
 358     ;;
 359   no)
 360     ;;
 361   *)
 362     AC_MSG_ERROR([invalid --enable-gold argument])
 363     ;;
 364 esac
 365
 366 AC_ARG_ENABLE(ld,
 367 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 368                 [build ld @<:@ARG={default,yes,no}@:>@])],
 369 ENABLE_LD=$enableval,
 370 ENABLE_LD=yes)
 371
 372 case "${ENABLE_LD}" in
 373   default)
 374     if test x${default_ld} != x; then
 375       AC_MSG_ERROR([either gold or ld can be the default ld])
 376     fi
 377     ;;
 378   yes)
 379     ;;
 380   no)
 381     if test x${ENABLE_GOLD} != xyes; then
 382       AC_MSG_WARN([neither ld nor gold are enabled])
 383     fi
 384     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 385     ;;
 386   *)
 387     AC_MSG_ERROR([invalid --enable-ld argument])
 388     ;;
 389 esac
 390
 391 # PR gas/19109
 392 # Decide the default method for compressing debug sections.
 393 # Provide a configure time option to override our default.
 394 AC_ARG_ENABLE(compressed_debug_sections,
 395 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 396                 [Enable compressed debug sections for gas, gold or ld by
 397                  default])],
 398 [
 399   if test x"$enable_compressed_debug_sections" = xyes; then
 400     AC_MSG_ERROR([no program with compressed debug sections specified])
 401   fi
 402 ], [enable_compressed_debug_sections=])
 403
 404 # Configure extra directories which are host specific
 405
 406 case "${host}" in
 407   *-cygwin*)
 408     configdirs="$configdirs libtermcap" ;;
 409 esac
 410
 411 # A target can indicate whether a language isn't supported for some reason.
 412 # Only spaces may be used in this macro; not newlines or tabs.
 413 unsupported_languages=
 414
 415 # Remove more programs from consideration, based on the host or
 416 # target this usually means that a port of the program doesn't
 417 # exist yet.
 418
 419 case "${host}" in
 420   i[[3456789]]86-*-msdosdjgpp*)
 421     noconfigdirs="$noconfigdirs tcl tk itcl"
 422     ;;
 423 esac
 424
 425
 426 AC_ARG_ENABLE(libquadmath,
 427 AS_HELP_STRING([--disable-libquadmath],
 428   [do not build libquadmath directory]),
 429 ENABLE_LIBQUADMATH=$enableval,
 430 ENABLE_LIBQUADMATH=yes)
 431 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 432   noconfigdirs="$noconfigdirs target-libquadmath"
 433 fi
 434
 435
 436 AC_ARG_ENABLE(libquadmath-support,
 437 AS_HELP_STRING([--disable-libquadmath-support],
 438   [disable libquadmath support for Fortran]),
 439 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 440 ENABLE_LIBQUADMATH_SUPPORT=yes)
 441 enable_libquadmath_support=
 442 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 443   enable_libquadmath_support=no
 444 fi
 445
 446
 447 AC_ARG_ENABLE(libada,
 448 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 449 ENABLE_LIBADA=$enableval,
 450 ENABLE_LIBADA=yes)
 451 if test "${ENABLE_LIBADA}" != "yes" ; then
 452   noconfigdirs="$noconfigdirs gnattools"
 453 fi
 454
 455 AC_ARG_ENABLE(libssp,
 456 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 457 ENABLE_LIBSSP=$enableval,
 458 ENABLE_LIBSSP=yes)
 459
 460 AC_ARG_ENABLE(libstdcxx,
 461 AS_HELP_STRING([--disable-libstdcxx],
 462   [do not build libstdc++-v3 directory]),
 463 ENABLE_LIBSTDCXX=$enableval,
 464 ENABLE_LIBSTDCXX=default)
 465 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 466   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 467 fi]
 468
 469 # If this is accelerator compiler and its target is intelmic we enable
 470 # target liboffloadmic by default.  If this is compiler with offloading
 471 # for intelmic we enable host liboffloadmic by default.  Otherwise
 472 # liboffloadmic is disabled by default.
 473 AC_ARG_ENABLE([liboffloadmic],
 474 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 475                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 476 [case "$enableval" in
 477   no | host | target)
 478     enable_liboffloadmic=$enableval ;;
 479   *)
 480     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 481 esac],
 482 [if test x"$enable_as_accelerator_for" != x; then
 483   case "${target}" in
 484     *-intelmic-* | *-intelmicemul-*)
 485       enable_liboffloadmic=target
 486       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 487       ;;
 488     *)
 489       enable_liboffloadmic=no
 490       ;;
 491   esac
 492 else
 493   case "${enable_offload_targets}" in
 494     *-intelmic-* | *-intelmicemul-*)
 495       enable_liboffloadmic=host
 496       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 497       ;;
 498     *)
 499       enable_liboffloadmic=no
 500       ;;
 501     esac
 502 fi])
 503 AC_SUBST(extra_liboffloadmic_configure_flags)
 504
 505 # Enable libgomp by default on hosted POSIX systems, and a few others.
 506 if test x$enable_libgomp = x ; then
 507     case "${target}" in
 508     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 509         ;;
 510     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 511         ;;
 512     *-*-solaris2* | *-*-hpux11*)
 513         ;;
 514     *-*-darwin* | *-*-aix*)
 515         ;;
 516     nvptx*-*-*)
 517         ;;
 518     *)
 519         noconfigdirs="$noconfigdirs target-libgomp"
 520         ;;
 521     esac
 522 fi
 523
 524 # Disable libatomic on unsupported systems.
 525 if test -d ${srcdir}/libatomic; then
 526     if test x$enable_libatomic = x; then
 527         AC_MSG_CHECKING([for libatomic support])
 528         if (srcdir=${srcdir}/libatomic; \
 529                 . ${srcdir}/configure.tgt; \
 530                 test -n "$UNSUPPORTED")
 531         then
 532             AC_MSG_RESULT([no])
 533             noconfigdirs="$noconfigdirs target-libatomic"
 534         else
 535             AC_MSG_RESULT([yes])
 536         fi
 537     fi
 538 fi
 539
 540 # Disable libcilkrts on unsupported systems.
 541 if test -d ${srcdir}/libcilkrts; then
 542     if test x$enable_libcilkrts = x; then
 543         AC_MSG_CHECKING([for libcilkrts support])
 544         if (srcdir=${srcdir}/libcilkrts; \
 545                 . ${srcdir}/configure.tgt; \
 546                 test -n "$UNSUPPORTED")
 547         then
 548             AC_MSG_RESULT([no])
 549             noconfigdirs="$noconfigdirs target-libcilkrts"
 550         else
 551             AC_MSG_RESULT([yes])
 552         fi
 553     fi
 554 fi
 555
 556 # Disable liboffloadmic on unsupported systems.
 557 if test -d ${srcdir}/liboffloadmic; then
 558     if test x$enable_liboffloadmic != xno; then
 559         AC_MSG_CHECKING([for liboffloadmic support])
 560         if (srcdir=${srcdir}/liboffloadmic; \
 561                 . ${srcdir}/configure.tgt; \
 562                 test -n "$UNSUPPORTED")
 563         then
 564             AC_MSG_RESULT([no])
 565             noconfigdirs="$noconfigdirs target-liboffloadmic"
 566         else
 567             AC_MSG_RESULT([yes])
 568         fi
 569     fi
 570 fi
 571
 572 # Disable libitm on unsupported systems.
 573 if test -d ${srcdir}/libitm; then
 574     if test x$enable_libitm = x; then
 575         AC_MSG_CHECKING([for libitm support])
 576         if (srcdir=${srcdir}/libitm; \
 577                 . ${srcdir}/configure.tgt; \
 578                 test -n "$UNSUPPORTED")
 579         then
 580             AC_MSG_RESULT([no])
 581             noconfigdirs="$noconfigdirs target-libitm"
 582         else
 583             AC_MSG_RESULT([yes])
 584         fi
 585     fi
 586 fi
 587
 588 # Disable libsanitizer on unsupported systems.
 589 if test -d ${srcdir}/libsanitizer; then
 590     if test x$enable_libsanitizer = x; then
 591         AC_MSG_CHECKING([for libsanitizer support])
 592         if (srcdir=${srcdir}/libsanitizer; \
 593                 . ${srcdir}/configure.tgt; \
 594                 test -n "$UNSUPPORTED")
 595         then
 596             AC_MSG_RESULT([no])
 597             noconfigdirs="$noconfigdirs target-libsanitizer"
 598         else
 599             AC_MSG_RESULT([yes])
 600         fi
 601     fi
 602 fi
 603
 604 # Disable libvtv on unsupported systems.
 605 if test -d ${srcdir}/libvtv; then
 606     if test x$enable_libvtv = x; then
 607         AC_MSG_CHECKING([for libvtv support])
 608         if (srcdir=${srcdir}/libvtv; \
 609                 . ${srcdir}/configure.tgt; \
 610                 test "$VTV_SUPPORTED" != "yes")
 611         then
 612             AC_MSG_RESULT([no])
 613             noconfigdirs="$noconfigdirs target-libvtv"
 614         else
 615             AC_MSG_RESULT([yes])
 616         fi
 617     fi
 618 fi
 619
 620
 621 # Enable libmpx on supported systems by request.
 622 if test -d ${srcdir}/libmpx; then
 623     if test x$enable_libmpx = x; then
 624        AC_MSG_CHECKING([for libmpx support])
 625        if (srcdir=${srcdir}/libmpx; \
 626                . ${srcdir}/configure.tgt; \
 627                test "$LIBMPX_SUPPORTED" != "yes")
 628        then
 629            AC_MSG_RESULT([no])
 630            noconfigdirs="$noconfigdirs target-libmpx"
 631        else
 632            AC_MSG_RESULT([yes])
 633        fi
 634     fi
 635 fi
 636
 637 # Disable libhsail-rt on unsupported systems.
 638 if test -d ${srcdir}/libhsail-rt; then
 639     if test x$enable_libhsail_rt = x; then
 640         AC_MSG_CHECKING([for libhsail-rt support])
 641         if (srcdir=${srcdir}/libhsail-rt; \
 642                 . ${srcdir}/configure.tgt; \
 643                 test -n "$UNSUPPORTED")
 644         then
 645             AC_MSG_RESULT([no])
 646             unsupported_languages="$unsupported_languages brig"
 647             # This implicitly disables also target-libhsail-rt as it won't
 648             # get added to the build without BRIG FE.
 649         else
 650             AC_MSG_RESULT([yes])
 651         fi
 652     fi
 653 fi
 654
 655
 656 # Disable libquadmath for some systems.
 657 case "${target}" in
 658   avr-*-*)
 659     noconfigdirs="$noconfigdirs target-libquadmath"
 660     ;;
 661   # libquadmath is unused on AIX and libquadmath build process use of
 662   # LD_LIBRARY_PATH can break AIX bootstrap.
 663   powerpc-*-aix* | rs6000-*-aix*)
 664     noconfigdirs="$noconfigdirs target-libquadmath"
 665     ;;
 666 esac
 667
 668 # Disable libssp for some systems.
 669 case "${target}" in
 670   avr-*-*)
 671     # No hosted I/O support.
 672     noconfigdirs="$noconfigdirs target-libssp"
 673     ;;
 674   powerpc-*-aix* | rs6000-*-aix*)
 675     noconfigdirs="$noconfigdirs target-libssp"
 676     ;;
 677   rl78-*-*)
 678     # libssp uses a misaligned load to trigger a fault, but the RL78
 679     # doesn't fault for those - instead, it gives a build-time error
 680     # for explicit misaligned loads.
 681     noconfigdirs="$noconfigdirs target-libssp"
 682     ;;
 683   visium-*-*)
 684     # No hosted I/O support.
 685     noconfigdirs="$noconfigdirs target-libssp"
 686     ;;
 687 esac
 688
 689 # Disable libstdc++-v3 for some systems.
 690 # Allow user to override this if they pass --enable-libstdc++-v3
 691 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 692   case "${target}" in
 693     *-*-vxworks*)
 694       # VxWorks uses the Dinkumware C++ library.
 695       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 696       ;;
 697     arm*-wince-pe*)
 698       # the C++ libraries don't build on top of CE's C libraries
 699       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 700       ;;
 701     avr-*-*)
 702       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 703       ;;
 704     ft32-*-*)
 705       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 706       ;;
 707   esac
 708 fi
 709
 710 # Disable Fortran for some systems.
 711 case "${target}" in
 712   mmix-*-*)
 713     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 714     unsupported_languages="$unsupported_languages fortran"
 715     ;;
 716 esac
 717
 718 # Disable libffi for some systems.
 719 case "${target}" in
 720   powerpc-*-darwin*)
 721     ;;
 722   i[[3456789]]86-*-darwin*)
 723     ;;
 724   x86_64-*-darwin[[912]]*)
 725     ;;
 726   *-*-darwin*)
 727     noconfigdirs="$noconfigdirs target-libffi"
 728     ;;
 729   *-*-netware*)
 730     noconfigdirs="$noconfigdirs target-libffi"
 731     ;;
 732   *-*-phoenix*)
 733     noconfigdirs="$noconfigdirs target-libffi"
 734     ;;
 735   *-*-rtems*)
 736     noconfigdirs="$noconfigdirs target-libffi"
 737     ;;
 738   *-*-tpf*)
 739     noconfigdirs="$noconfigdirs target-libffi"
 740     ;;
 741   *-*-uclinux*)
 742     noconfigdirs="$noconfigdirs target-libffi"
 743     ;;
 744   *-*-vxworks*)
 745     noconfigdirs="$noconfigdirs target-libffi"
 746     ;;
 747   aarch64*-*-freebsd*)
 748     noconfigdirs="$noconfigdirs target-libffi"
 749     ;;
 750   alpha*-*-*vms*)
 751     noconfigdirs="$noconfigdirs target-libffi"
 752     ;;
 753   arm*-*-freebsd*)
 754     noconfigdirs="$noconfigdirs target-libffi"
 755     ;;
 756   arm-wince-pe)
 757     noconfigdirs="$noconfigdirs target-libffi"
 758     ;;
 759   arm*-*-symbianelf*)
 760     noconfigdirs="$noconfigdirs target-libffi"
 761     ;;
 762   cris-*-* | crisv32-*-*)
 763     case "${target}" in
 764       *-*-linux*)
 765         ;;
 766       *) # See PR46792 regarding target-libffi.
 767         noconfigdirs="$noconfigdirs target-libffi";;
 768     esac
 769     ;;
 770   hppa*64*-*-hpux*)
 771     noconfigdirs="$noconfigdirs target-libffi"
 772     ;;
 773   hppa*-hp-hpux11*)
 774     ;;
 775   hppa*-*-hpux*)
 776     noconfigdirs="$noconfigdirs target-libffi"
 777     ;;
 778   ia64*-*-*vms*)
 779     noconfigdirs="$noconfigdirs target-libffi"
 780     ;;
 781   i[[3456789]]86-w64-mingw*)
 782     noconfigdirs="$noconfigdirs target-libffi"
 783     ;;
 784   i[[3456789]]86-*-mingw*)
 785     noconfigdirs="$noconfigdirs target-libffi"
 786     ;;
 787   x86_64-*-mingw*)
 788     noconfigdirs="$noconfigdirs target-libffi"
 789     ;;
 790   mmix-*-*)
 791     noconfigdirs="$noconfigdirs target-libffi"
 792     ;;
 793   powerpc-*-aix*)
 794     # copied from rs6000-*-* entry
 795     noconfigdirs="$noconfigdirs target-libffi"
 796     ;;
 797   rs6000-*-aix*)
 798     noconfigdirs="$noconfigdirs target-libffi"
 799     ;;
 800   ft32-*-*)
 801     noconfigdirs="$noconfigdirs target-libffi"
 802     ;;
 803   *-*-lynxos*)
 804     noconfigdirs="$noconfigdirs target-libffi"
 805     ;;
 806 esac
 807
 808 # Disable the go frontend on systems where it is known to not work. Please keep
 809 # this in sync with contrib/config-list.mk.
 810 case "${target}" in
 811 *-*-darwin* | *-*-cygwin* | *-*-mingw* | *-*-aix*)
 812     unsupported_languages="$unsupported_languages go"
 813     ;;
 814 esac
 815
 816 # Disable libgo for some systems where it is known to not work.
 817 # For testing, you can easily override this with --enable-libgo.
 818 if test x$enable_libgo = x; then
 819     case "${target}" in
 820     *-*-darwin*)
 821         # PR 46986
 822         noconfigdirs="$noconfigdirs target-libgo"
 823         ;;
 824     *-*-cygwin* | *-*-mingw*)
 825         noconfigdirs="$noconfigdirs target-libgo"
 826         ;;
 827     *-*-aix*)
 828         noconfigdirs="$noconfigdirs target-libgo"
 829         ;;
 830     esac
 831 fi
 832
 833 # Default libgloss CPU subdirectory.
 834 libgloss_dir="$target_cpu"
 835
 836 case "${target}" in
 837   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 838     libgloss_dir=wince
 839     ;;
 840   aarch64*-*-* )
 841     libgloss_dir=aarch64
 842     ;;
 843   arm*-*-*)
 844     libgloss_dir=arm
 845     ;;
 846   cris-*-* | crisv32-*-*)
 847     libgloss_dir=cris
 848     ;;
 849   hppa*-*-*)
 850     libgloss_dir=pa
 851     ;;
 852   i[[3456789]]86-*-*)
 853     libgloss_dir=i386
 854     ;;
 855   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 856     libgloss_dir=m68hc11
 857     ;;
 858   m68*-*-* | fido-*-*)
 859     libgloss_dir=m68k
 860     ;;
 861   mips*-*-*)
 862     libgloss_dir=mips
 863     ;;
 864   powerpc*-*-*)
 865     libgloss_dir=rs6000
 866     ;;
 867   sparc*-*-*)
 868     libgloss_dir=sparc
 869     ;;
 870 esac
 871
 872 # Disable newlib and libgloss for various target OSes.
 873 case "${target}" in
 874   alpha*-dec-osf*)
 875     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 876     ;;
 877   i[[3456789]]86-*-linux*)
 878     # This section makes it possible to build newlib natively on linux.
 879     # If we are using a cross compiler then don't configure newlib.
 880     if test x${is_cross_compiler} != xno ; then
 881       noconfigdirs="$noconfigdirs target-newlib"
 882     fi
 883     noconfigdirs="$noconfigdirs target-libgloss"
 884     # If we are not using a cross compiler, do configure newlib.
 885     # Note however, that newlib will only be configured in this situation
 886     # if the --with-newlib option has been given, because otherwise
 887     # 'target-newlib' will appear in skipdirs.
 888     ;;
 889   i[[3456789]]86-*-rdos*)
 890     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 891     ;;
 892   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 893     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 894     ;;
 895   sparc-*-sunos4*)
 896     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 897     ;;
 898   *-*-aix*)
 899     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 900     ;;
 901   *-*-beos*)
 902     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 903     ;;
 904   *-*-chorusos)
 905     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 906     ;;
 907   *-*-dragonfly*)
 908     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 909     ;;
 910   *-*-freebsd*)
 911     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 912     ;;
 913   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 914     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 915     ;;
 916   *-*-lynxos*)
 917     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 918     ;;
 919   *-*-mingw*)
 920     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 921     ;;
 922   *-*-netbsd*)
 923     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 924     ;;
 925   *-*-netware*)
 926     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 927     ;;
 928   *-*-tpf*)
 929     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 930     ;;
 931   *-*-uclinux*)
 932     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 933     ;;
 934   *-*-vxworks*)
 935     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 936     ;;
 937 esac
 938
 939 case "${target}" in
 940   *-*-chorusos)
 941     ;;
 942   aarch64-*-darwin*)
 943     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 944     noconfigdirs="$noconfigdirs sim target-rda"
 945     ;;
 946   arm-*-darwin*)
 947     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 948     noconfigdirs="$noconfigdirs sim target-rda"
 949     ;;
 950   powerpc-*-darwin*)
 951     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 952     noconfigdirs="$noconfigdirs sim target-rda"
 953     ;;
 954   i[[3456789]]86-*-darwin*)
 955     noconfigdirs="$noconfigdirs ld gprof"
 956     noconfigdirs="$noconfigdirs sim target-rda"
 957     ;;
 958   x86_64-*-darwin[[912]]*)
 959     noconfigdirs="$noconfigdirs ld gas gprof"
 960     noconfigdirs="$noconfigdirs sim target-rda"
 961     ;;
 962   *-*-darwin*)
 963     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 964     noconfigdirs="$noconfigdirs sim target-rda"
 965     ;;
 966   *-*-dragonfly*)
 967     ;;
 968   *-*-freebsd*)
 969     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
 970         && test -f /usr/local/include/gmp.h; then
 971       with_gmp=/usr/local
 972     fi
 973     ;;
 974   *-*-kaos*)
 975     # Remove unsupported stuff on all kaOS configurations.
 976     noconfigdirs="$noconfigdirs target-libgloss"
 977     ;;
 978   *-*-netbsd*)
 979     ;;
 980   *-*-netware*)
 981     ;;
 982   *-*-phoenix*)
 983     noconfigdirs="$noconfigdirs target-libgloss"
 984     ;;
 985   *-*-rtems*)
 986     noconfigdirs="$noconfigdirs target-libgloss"
 987     # this is not caught below because this stanza matches earlier
 988     case $target in
 989       or1k*-*-*) noconfigdirs="$noconfigdirs gdb" ;;
 990     esac
 991     ;;
 992     # The tpf target doesn't support gdb yet.
 993   *-*-tpf*)
 994     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
 995     ;;
 996   *-*-uclinux*)
 997     noconfigdirs="$noconfigdirs target-rda"
 998     ;;
 999   *-*-vxworks*)
1000     ;;
1001   alpha*-dec-osf*)
1002     # ld works, but does not support shared libraries.
1003     # gas doesn't generate exception information.
1004     noconfigdirs="$noconfigdirs gas ld"
1005     ;;
1006   alpha*-*-*vms*)
1007     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1008     ;;
1009   alpha*-*-*)
1010     # newlib is not 64 bit ready
1011     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1012     ;;
1013   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1014     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1015     ;;
1016   arc*-*-*)
1017     noconfigdirs="$noconfigdirs sim"
1018     ;;
1019   arm-*-pe*)
1020     noconfigdirs="$noconfigdirs target-libgloss"
1021     ;;
1022   arm-*-riscix*)
1023     noconfigdirs="$noconfigdirs ld target-libgloss"
1024     ;;
1025   avr-*-*)
1026     if test x${with_avrlibc} != xno; then
1027       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1028     fi
1029     ;;
1030   c4x-*-* | tic4x-*-*)
1031     noconfigdirs="$noconfigdirs target-libgloss"
1032     ;;
1033   tic54x-*-*)
1034     noconfigdirs="$noconfigdirs target-libgloss gdb"
1035     ;;
1036   d10v-*-*)
1037     noconfigdirs="$noconfigdirs target-libgloss"
1038     ;;
1039   d30v-*-*)
1040     noconfigdirs="$noconfigdirs gdb"
1041     ;;
1042   fr30-*-elf*)
1043     noconfigdirs="$noconfigdirs gdb"
1044     ;;
1045   ft32-*-*)
1046     noconfigdirs="$noconfigdirs target-rda gprof"
1047     ;;
1048   moxie-*-*)
1049     noconfigdirs="$noconfigdirs"
1050     ;;
1051   h8300*-*-*)
1052     noconfigdirs="$noconfigdirs target-libgloss"
1053     ;;
1054   h8500-*-*)
1055     noconfigdirs="$noconfigdirs target-libgloss"
1056     ;;
1057   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1058     ;;
1059   hppa*64*-*-hpux*)
1060     noconfigdirs="$noconfigdirs gdb"
1061     ;;
1062   hppa*-*-hpux11*)
1063     noconfigdirs="$noconfigdirs gdb ld"
1064     ;;
1065   hppa*64*-*-linux*)
1066     ;;
1067   hppa*-*-linux*)
1068     ;;
1069   hppa*-*-*elf* | \
1070   hppa*-*-lites* | \
1071   hppa*-*-openbsd* | \
1072   hppa*64*-*-*)
1073     ;;
1074   hppa*-*-pro*)
1075     ;;
1076   hppa*-*-*)
1077     noconfigdirs="$noconfigdirs ld"
1078     ;;
1079   i960-*-*)
1080     noconfigdirs="$noconfigdirs gdb"
1081     ;;
1082   ia64*-*-elf*)
1083     # No gdb support yet.
1084     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1085     ;;
1086   ia64*-**-hpux*)
1087     # No ld support yet.
1088     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1089     ;;
1090   ia64*-*-*vms*)
1091     # No ld support yet.
1092     noconfigdirs="$noconfigdirs libgui itcl ld"
1093     ;;
1094   i[[3456789]]86-w64-mingw*)
1095     ;;
1096   i[[3456789]]86-*-mingw*)
1097     target_configdirs="$target_configdirs target-winsup"
1098     ;;
1099   *-*-cygwin*)
1100     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1101     noconfigdirs="$noconfigdirs target-libgloss"
1102     # always build newlib if winsup directory is present.
1103     if test -d "$srcdir/winsup/cygwin"; then
1104       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1105     elif test -d "$srcdir/newlib"; then
1106       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1107     fi
1108     ;;
1109   i[[3456789]]86-*-pe)
1110     noconfigdirs="$noconfigdirs target-libgloss"
1111     ;;
1112   i[[3456789]]86-*-sco3.2v5*)
1113     # The linker does not yet know about weak symbols in COFF,
1114     # and is not configured to handle mixed ELF and COFF.
1115     noconfigdirs="$noconfigdirs ld target-libgloss"
1116     ;;
1117   i[[3456789]]86-*-sco*)
1118     noconfigdirs="$noconfigdirs gprof target-libgloss"
1119     ;;
1120   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1121     noconfigdirs="$noconfigdirs target-libgloss"
1122     ;;
1123   i[[3456789]]86-*-sysv4*)
1124     noconfigdirs="$noconfigdirs target-libgloss"
1125     ;;
1126   i[[3456789]]86-*-beos*)
1127     noconfigdirs="$noconfigdirs gdb"
1128     ;;
1129   i[[3456789]]86-*-rdos*)
1130     noconfigdirs="$noconfigdirs gdb"
1131     ;;
1132   mmix-*-*)
1133     noconfigdirs="$noconfigdirs gdb"
1134     ;;
1135   mt-*-*)
1136     noconfigdirs="$noconfigdirs sim"
1137     ;;
1138   powerpc-*-aix*)
1139     # copied from rs6000-*-* entry
1140     noconfigdirs="$noconfigdirs gprof"
1141     ;;
1142   powerpc*-*-winnt* | powerpc*-*-pe*)
1143     target_configdirs="$target_configdirs target-winsup"
1144     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1145     # always build newlib.
1146     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1147     ;;
1148     # This is temporary until we can link against shared libraries
1149   powerpcle-*-solaris*)
1150     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1151     ;;
1152   powerpc-*-beos*)
1153     noconfigdirs="$noconfigdirs gdb"
1154     ;;
1155   rs6000-*-lynxos*)
1156     noconfigdirs="$noconfigdirs gprof"
1157     ;;
1158   rs6000-*-aix*)
1159     noconfigdirs="$noconfigdirs gprof"
1160     ;;
1161   rs6000-*-*)
1162     noconfigdirs="$noconfigdirs gprof"
1163     ;;
1164   m68k-apollo-*)
1165     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1166     ;;
1167   microblaze*)
1168     noconfigdirs="$noconfigdirs gprof"
1169     ;;
1170   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1171     if test x$with_newlib = xyes; then
1172       noconfigdirs="$noconfigdirs gprof"
1173     fi
1174     ;;
1175   mips*-*-irix5*)
1176     noconfigdirs="$noconfigdirs gprof target-libgloss"
1177     ;;
1178   mips*-*-irix6*)
1179     noconfigdirs="$noconfigdirs gprof target-libgloss"
1180     ;;
1181   mips*-*-bsd*)
1182     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1183     ;;
1184   mips*-*-linux*)
1185     ;;
1186   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1187   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1188     noconfigdirs="$noconfigdirs ld gas gprof"
1189     ;;
1190   mips*-*-*)
1191     noconfigdirs="$noconfigdirs gprof"
1192     ;;
1193   nvptx*-*-*)
1194     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1195     ;;
1196   or1k*-*-*)
1197     noconfigdirs="$noconfigdirs gdb"
1198     ;;
1199   sh-*-*)
1200     case "${target}" in
1201       sh*-*-elf)
1202          ;;
1203       *)
1204          noconfigdirs="$noconfigdirs target-libgloss" ;;
1205     esac
1206     ;;
1207   sparc-*-sunos4*)
1208     if test x${is_cross_compiler} = xno ; then
1209            use_gnu_ld=no
1210     fi
1211     ;;
1212   tic6x-*-*)
1213     noconfigdirs="$noconfigdirs sim"
1214     ;;
1215   tilepro*-*-* | tilegx*-*-*)
1216     noconfigdirs="$noconfigdirs sim"
1217     ;;
1218   v810-*-*)
1219     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1220     ;;
1221   vax-*-*)
1222     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1223     ;;
1224 esac
1225
1226 # If we aren't building newlib, then don't build libgloss, since libgloss
1227 # depends upon some newlib header files.
1228 case "${noconfigdirs}" in
1229   *target-libgloss*) ;;
1230   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1231 esac
1232
1233 # Work in distributions that contain no compiler tools, like Autoconf.
1234 host_makefile_frag=/dev/null
1235 if test -d ${srcdir}/config ; then
1236 case "${host}" in
1237   i[[3456789]]86-*-msdosdjgpp*)
1238     host_makefile_frag="config/mh-djgpp"
1239     ;;
1240   *-cygwin*)
1241     ACX_CHECK_CYGWIN_CAT_WORKS
1242     host_makefile_frag="config/mh-cygwin"
1243     ;;
1244   *-mingw*)
1245     host_makefile_frag="config/mh-mingw"
1246     ;;
1247   alpha*-linux*)
1248     host_makefile_frag="config/mh-alpha-linux"
1249     ;;
1250   hppa*-hp-hpux10*)
1251     host_makefile_frag="config/mh-pa-hpux10"
1252     ;;
1253   hppa*-hp-hpux*)
1254     host_makefile_frag="config/mh-pa"
1255     ;;
1256   hppa*-*)
1257     host_makefile_frag="config/mh-pa"
1258     ;;
1259   *-*-darwin*)
1260     host_makefile_frag="config/mh-darwin"
1261     ;;
1262   powerpc-*-aix*)
1263     host_makefile_frag="config/mh-ppc-aix"
1264     ;;
1265   rs6000-*-aix*)
1266     host_makefile_frag="config/mh-ppc-aix"
1267     ;;
1268 esac
1269 fi
1270
1271 if test "${build}" != "${host}" ; then
1272   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1273   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1274   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1275   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1276   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1277   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1278   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1279   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1280   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1281   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1282   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1283   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1284 else
1285   AR_FOR_BUILD="\$(AR)"
1286   AS_FOR_BUILD="\$(AS)"
1287   CC_FOR_BUILD="\$(CC)"
1288   CXX_FOR_BUILD="\$(CXX)"
1289   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1290   GOC_FOR_BUILD="\$(GOC)"
1291   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1292   LD_FOR_BUILD="\$(LD)"
1293   NM_FOR_BUILD="\$(NM)"
1294   RANLIB_FOR_BUILD="\$(RANLIB)"
1295   WINDRES_FOR_BUILD="\$(WINDRES)"
1296   WINDMC_FOR_BUILD="\$(WINDMC)"
1297 fi
1298
1299 AC_PROG_CC
1300 AC_PROG_CXX
1301
1302 # We must set the default linker to the linker used by gcc for the correct
1303 # operation of libtool.  If LD is not defined and we are using gcc, try to
1304 # set the LD default to the ld used by gcc.
1305 if test -z "$LD"; then
1306   if test "$GCC" = yes; then
1307     case $build in
1308     *-*-mingw*)
1309       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1310     *)
1311       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1312     esac
1313     case $gcc_prog_ld in
1314     # Accept absolute paths.
1315     [[\\/]* | [A-Za-z]:[\\/]*)]
1316       LD="$gcc_prog_ld" ;;
1317     esac
1318   fi
1319 fi
1320
1321 # Check whether -static-libstdc++ -static-libgcc is supported.
1322 have_static_libs=no
1323 if test "$GCC" = yes; then
1324   saved_LDFLAGS="$LDFLAGS"
1325
1326   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1327   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1328   AC_LANG_PUSH(C++)
1329   AC_LINK_IFELSE([
1330 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1331 #error -static-libstdc++ not implemented
1332 #endif
1333 int main() {}],
1334     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1335     [AC_MSG_RESULT([no])])
1336   AC_LANG_POP(C++)
1337
1338   LDFLAGS="$saved_LDFLAGS"
1339 fi
1340
1341 ACX_PROG_GNAT
1342 ACX_PROG_CMP_IGNORE_INITIAL
1343
1344 AC_ARG_ENABLE([bootstrap],
1345 [AS_HELP_STRING([--enable-bootstrap],
1346                 [enable bootstrapping @<:@yes if native build@:>@])],,
1347 enable_bootstrap=default)
1348
1349 # Issue errors and warnings for invalid/strange bootstrap combinations.
1350 if test -r $srcdir/gcc/configure; then
1351   have_compiler=yes
1352 else
1353   have_compiler=no
1354 fi
1355
1356 case "$have_compiler:$host:$target:$enable_bootstrap" in
1357   *:*:*:no) ;;
1358
1359   # Default behavior.  Enable bootstrap if we have a compiler
1360   # and we are in a native configuration.
1361   yes:$build:$build:default)
1362     enable_bootstrap=yes ;;
1363
1364   *:*:*:default)
1365     enable_bootstrap=no ;;
1366
1367   # We have a compiler and we are in a native configuration, bootstrap is ok
1368   yes:$build:$build:yes)
1369     ;;
1370
1371   # Other configurations, but we have a compiler.  Assume the user knows
1372   # what he's doing.
1373   yes:*:*:yes)
1374     AC_MSG_WARN([trying to bootstrap a cross compiler])
1375     ;;
1376
1377   # No compiler: if they passed --enable-bootstrap explicitly, fail
1378   no:*:*:yes)
1379     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1380
1381   # Fail if wrong command line
1382   *)
1383     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1384     ;;
1385 esac
1386
1387 # When bootstrapping with GCC, build stage 1 in C++98 mode to ensure that a
1388 # C++98 compiler can still start the bootstrap.
1389 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1390   CXX="$CXX -std=gnu++98"
1391 fi
1392
1393 # Used for setting $lt_cv_objdir
1394 _LT_CHECK_OBJDIR
1395
1396 # Check for GMP, MPFR and MPC
1397 gmplibs="-lmpc -lmpfr -lgmp"
1398 gmpinc=
1399 have_gmp=no
1400
1401 # Specify a location for mpc
1402 # check for this first so it ends up on the link line before mpfr.
1403 AC_ARG_WITH(mpc,
1404 [AS_HELP_STRING([--with-mpc=PATH],
1405                 [specify prefix directory for installed MPC package.
1406                  Equivalent to --with-mpc-include=PATH/include
1407                  plus --with-mpc-lib=PATH/lib])])
1408 AC_ARG_WITH(mpc-include,
1409 [AS_HELP_STRING([--with-mpc-include=PATH],
1410                 [specify directory for installed MPC include files])])
1411 AC_ARG_WITH(mpc-lib,
1412 [AS_HELP_STRING([--with-mpc-lib=PATH],
1413                 [specify directory for the installed MPC library])])
1414
1415 if test "x$with_mpc" != x; then
1416   gmplibs="-L$with_mpc/lib $gmplibs"
1417   gmpinc="-I$with_mpc/include $gmpinc"
1418 fi
1419 if test "x$with_mpc_include" != x; then
1420   gmpinc="-I$with_mpc_include $gmpinc"
1421 fi
1422 if test "x$with_mpc_lib" != x; then
1423   gmplibs="-L$with_mpc_lib $gmplibs"
1424 fi
1425 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1426   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1427   gmpinc='-I$$s/mpc/src '"$gmpinc"
1428   # Do not test the mpc version.  Assume that it is sufficient, since
1429   # it is in the source tree, and the library has not been built yet
1430   # but it would be included on the link line in the version check below
1431   # hence making the test fail.
1432   have_gmp=yes
1433 fi
1434
1435 # Specify a location for mpfr
1436 # check for this first so it ends up on the link line before gmp.
1437 AC_ARG_WITH(mpfr-dir,
1438 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1439 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1440 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1441
1442 AC_ARG_WITH(mpfr,
1443 [AS_HELP_STRING([--with-mpfr=PATH],
1444                 [specify prefix directory for installed MPFR package.
1445                  Equivalent to --with-mpfr-include=PATH/include
1446                  plus --with-mpfr-lib=PATH/lib])])
1447 AC_ARG_WITH(mpfr-include,
1448 [AS_HELP_STRING([--with-mpfr-include=PATH],
1449                 [specify directory for installed MPFR include files])])
1450 AC_ARG_WITH(mpfr-lib,
1451 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1452                 [specify directory for the installed MPFR library])])
1453
1454 if test "x$with_mpfr" != x; then
1455   gmplibs="-L$with_mpfr/lib $gmplibs"
1456   gmpinc="-I$with_mpfr/include $gmpinc"
1457 fi
1458 if test "x$with_mpfr_include" != x; then
1459   gmpinc="-I$with_mpfr_include $gmpinc"
1460 fi
1461 if test "x$with_mpfr_lib" != x; then
1462   gmplibs="-L$with_mpfr_lib $gmplibs"
1463 fi
1464 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1465   # MPFR v3.1.0 moved the sources into a src sub-directory.
1466   if ! test -d ${srcdir}/mpfr/src; then
1467     AC_MSG_ERROR([dnl
1468 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1469   fi
1470   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1471   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1472   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1473   # Do not test the mpfr version.  Assume that it is sufficient, since
1474   # it is in the source tree, and the library has not been built yet
1475   # but it would be included on the link line in the version check below
1476   # hence making the test fail.
1477   have_gmp=yes
1478 fi
1479
1480 # Specify a location for gmp
1481 AC_ARG_WITH(gmp-dir,
1482 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1483 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1484 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1485
1486 AC_ARG_WITH(gmp,
1487 [AS_HELP_STRING([--with-gmp=PATH],
1488                 [specify prefix directory for the installed GMP package.
1489                  Equivalent to --with-gmp-include=PATH/include
1490                  plus --with-gmp-lib=PATH/lib])])
1491 AC_ARG_WITH(gmp-include,
1492 [AS_HELP_STRING([--with-gmp-include=PATH],
1493                 [specify directory for installed GMP include files])])
1494 AC_ARG_WITH(gmp-lib,
1495 [AS_HELP_STRING([--with-gmp-lib=PATH],
1496                 [specify directory for the installed GMP library])])
1497
1498
1499 if test "x$with_gmp" != x; then
1500   gmplibs="-L$with_gmp/lib $gmplibs"
1501   gmpinc="-I$with_gmp/include $gmpinc"
1502 fi
1503 if test "x$with_gmp_include" != x; then
1504   gmpinc="-I$with_gmp_include $gmpinc"
1505 fi
1506 if test "x$with_gmp_lib" != x; then
1507   gmplibs="-L$with_gmp_lib $gmplibs"
1508 fi
1509 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1510   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1511   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1512   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1513   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1514   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1515   # Do not test the gmp version.  Assume that it is sufficient, since
1516   # it is in the source tree, and the library has not been built yet
1517   # but it would be included on the link line in the version check below
1518   # hence making the test fail.
1519   have_gmp=yes
1520 fi
1521
1522 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1523   have_gmp=yes
1524   saved_CFLAGS="$CFLAGS"
1525   CFLAGS="$CFLAGS $gmpinc"
1526   # Check for the recommended and required versions of GMP.
1527   AC_MSG_CHECKING([for the correct version of gmp.h])
1528   AC_TRY_COMPILE([#include "gmp.h"],[
1529   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1530   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1531   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1532   choke me
1533   #endif
1534   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1535   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1536   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1537   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1538   choke me
1539   #endif
1540   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1541    [AC_MSG_RESULT([no]); have_gmp=no])
1542
1543   # If we have GMP, check the MPFR version.
1544   if test x"$have_gmp" = xyes; then
1545     # Check for the recommended and required versions of MPFR.
1546     AC_MSG_CHECKING([for the correct version of mpfr.h])
1547     AC_TRY_COMPILE([#include <gmp.h>
1548     #include <mpfr.h>],[
1549     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,0)
1550     choke me
1551     #endif
1552     ], [AC_TRY_COMPILE([#include <gmp.h>
1553     #include <mpfr.h>],[
1554     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,2)
1555     choke me
1556     #endif
1557     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1558      [AC_MSG_RESULT([no]); have_gmp=no])
1559   fi
1560
1561   # Check for the MPC header version.
1562   if test x"$have_gmp" = xyes ; then
1563     # Check for the recommended and required versions of MPC.
1564     AC_MSG_CHECKING([for the correct version of mpc.h])
1565     AC_TRY_COMPILE([#include <mpc.h>],[
1566     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1567     choke me
1568     #endif
1569     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1570     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1571     choke me
1572     #endif
1573     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1574      [AC_MSG_RESULT([no]); have_gmp=no])
1575   fi
1576
1577   # Now check the MPFR library.
1578   if test x"$have_gmp" = xyes; then
1579     saved_LIBS="$LIBS"
1580     LIBS="$LIBS $gmplibs"
1581     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1582     AC_TRY_LINK([#include <mpc.h>],[
1583     mpfr_t n;
1584     mpfr_t x;
1585     mpc_t c;
1586     int t;
1587     mpfr_init (n);
1588     mpfr_init (x);
1589     mpfr_atan2 (n, n, x, GMP_RNDN);
1590     mpfr_erfc (n, x, GMP_RNDN);
1591     mpfr_subnormalize (x, t, GMP_RNDN);
1592     mpfr_clear(n);
1593     mpfr_clear(x);
1594     mpc_init2 (c, 53);
1595     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1596     mpc_cosh (c, c, MPC_RNDNN);
1597     mpc_pow (c, c, c, MPC_RNDNN);
1598     mpc_acosh (c, c, MPC_RNDNN);
1599     mpc_clear (c);
1600     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1601     LIBS="$saved_LIBS"
1602   fi
1603
1604   CFLAGS="$saved_CFLAGS"
1605
1606 # The library versions listed in the error message below should match
1607 # the HARD-minimums enforced above.
1608   if test x$have_gmp != xyes; then
1609     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
1610 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1611 their locations.  Source code for these libraries can be found at
1612 their respective hosting sites as well as at
1613 ftp://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1614 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1615 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1616 make sure that you have installed both the libraries and the header
1617 files.  They may be located in separate packages.])
1618   fi
1619 fi
1620
1621 # Flags needed for both GMP, MPFR and/or MPC.
1622 AC_SUBST(gmplibs)
1623 AC_SUBST(gmpinc)
1624 AC_SUBST(extra_mpfr_configure_flags)
1625 AC_SUBST(extra_mpc_gmp_configure_flags)
1626 AC_SUBST(extra_mpc_mpfr_configure_flags)
1627 AC_SUBST(extra_isl_gmp_configure_flags)
1628
1629 # Libraries to use for stage1 or when not bootstrapping.
1630 AC_ARG_WITH(stage1-libs,
1631 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1632 [if test "$withval" = "no" -o "$withval" = "yes"; then
1633    stage1_libs=
1634  else
1635    stage1_libs=$withval
1636  fi],
1637 [stage1_libs=])
1638 AC_SUBST(stage1_libs)
1639
1640 # Linker flags to use for stage1 or when not bootstrapping.
1641 AC_ARG_WITH(stage1-ldflags,
1642 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1643 [if test "$withval" = "no" -o "$withval" = "yes"; then
1644    stage1_ldflags=
1645  else
1646    stage1_ldflags=$withval
1647  fi],
1648 [stage1_ldflags=
1649  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1650  # if supported.  But if the user explicitly specified the libraries to use,
1651  # trust that they are doing what they want.
1652  if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
1653    stage1_ldflags="-static-libstdc++ -static-libgcc"
1654  fi])
1655 AC_SUBST(stage1_ldflags)
1656
1657 # Libraries to use for stage2 and later builds.
1658 AC_ARG_WITH(boot-libs,
1659 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1660 [if test "$withval" = "no" -o "$withval" = "yes"; then
1661    poststage1_libs=
1662  else
1663    poststage1_libs=$withval
1664  fi],
1665 [poststage1_libs=])
1666 AC_SUBST(poststage1_libs)
1667
1668 # Linker flags to use for stage2 and later builds.
1669 AC_ARG_WITH(boot-ldflags,
1670 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1671                 [linker flags for stage2 and later])],
1672 [if test "$withval" = "no" -o "$withval" = "yes"; then
1673    poststage1_ldflags=
1674  else
1675    poststage1_ldflags=$withval
1676  fi],
1677 [poststage1_ldflags=
1678  # In stages 2 and 3, default to linking libstdc++ and libgcc
1679  # statically.  But if the user explicitly specified the libraries to
1680  # use, trust that they are doing what they want.
1681  if test "$poststage1_libs" = ""; then
1682    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1683  fi])
1684 AC_SUBST(poststage1_ldflags)
1685
1686 # GCC GRAPHITE dependency isl.
1687 # Basic setup is inlined here, actual checks are in config/isl.m4
1688
1689 AC_ARG_WITH(isl,
1690   [AS_HELP_STRING(
1691    [--with-isl=PATH],
1692    [Specify prefix directory for the installed isl package.
1693     Equivalent to --with-isl-include=PATH/include
1694     plus --with-isl-lib=PATH/lib])])
1695
1696 # Treat --without-isl as a request to disable
1697 # GRAPHITE support and skip all following checks.
1698 if test "x$with_isl" != "xno"; then
1699   # Check for isl
1700   dnl Provide configure switches and initialize islinc & isllibs
1701   dnl with user input.
1702   ISL_INIT_FLAGS
1703   dnl The versions of isl that work for Graphite
1704   ISL_CHECK_VERSION()
1705   dnl Only execute fail-action, if isl has been requested.
1706   ISL_IF_FAILED([
1707     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1708 fi
1709
1710 # If the isl check failed, disable builds of in-tree variant of isl
1711 if test "x$with_isl" = xno ||
1712    test "x$gcc_cv_isl" = xno; then
1713   noconfigdirs="$noconfigdirs isl"
1714   islinc=
1715 fi
1716
1717 AC_SUBST(isllibs)
1718 AC_SUBST(islinc)
1719
1720 # Check for LTO support.
1721 AC_ARG_ENABLE(lto,
1722 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1723 enable_lto=$enableval,
1724 enable_lto=yes; default_enable_lto=yes)
1725
1726 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1727   build_lto_plugin=yes
1728 ],[if test x"$default_enable_lto" = x"yes" ; then
1729     case $target in
1730       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1731       # On other non-ELF platforms, LTO has yet to be validated.
1732       *) enable_lto=no ;;
1733     esac
1734   else
1735   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1736   # It would also be nice to check the binutils support, but we don't
1737   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1738   # warn during gcc/ subconfigure; unless you're bootstrapping with
1739   # -flto it won't be needed until after installation anyway.
1740     case $target in
1741       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1742       *) if test x"$enable_lto" = x"yes"; then
1743         AC_MSG_ERROR([LTO support is not enabled for this target.])
1744         fi
1745       ;;
1746     esac
1747   fi
1748   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1749   # Build it unless LTO was explicitly disabled.
1750   case $target in
1751     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1752     *) ;;
1753   esac
1754 ])
1755
1756 AC_ARG_ENABLE(linker-plugin-configure-flags,
1757   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1758     [additional flags for configuring linker plugins @<:@none@:>@])],
1759   extra_linker_plugin_configure_flags=$enableval,
1760   extra_linker_plugin_configure_flags=)
1761 AC_SUBST(extra_linker_plugin_configure_flags)
1762 AC_ARG_ENABLE(linker-plugin-flags,
1763   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1764     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1765   extra_linker_plugin_flags=$enableval,
1766   extra_linker_plugin_flags=)
1767 AC_SUBST(extra_linker_plugin_flags)
1768
1769 # Enable --enable-host-shared.
1770 # Checked early to determine whether jit is an 'all' language
1771 AC_ARG_ENABLE(host-shared,
1772 [AS_HELP_STRING([--enable-host-shared],
1773                 [build host code as shared libraries])],
1774 [host_shared=$enableval], [host_shared=no])
1775 AC_SUBST(host_shared)
1776
1777 # By default, C and C++ are the only stage 1 languages.
1778 stage1_languages=,c,
1779
1780 # Target libraries that we bootstrap.
1781 bootstrap_target_libs=,target-libgcc,
1782
1783 # Figure out what language subdirectories are present.
1784 # Look if the user specified --enable-languages="..."; if not, use
1785 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1786 # go away some day.
1787 # NB:  embedded tabs in this IF block -- do not untabify
1788 if test -d ${srcdir}/gcc; then
1789   if test x"${enable_languages+set}" != xset; then
1790     if test x"${LANGUAGES+set}" = xset; then
1791       enable_languages="${LANGUAGES}"
1792         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1793     else
1794       enable_languages=default
1795     fi
1796   else
1797     if test x"${enable_languages}" = x ||
1798        test x"${enable_languages}" = xyes;
1799        then
1800       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1801       exit 1
1802     fi
1803   fi
1804   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1805
1806   # 'f95' is the old name for the 'fortran' language. We issue a warning
1807   # and make the substitution.
1808   case ,${enable_languages}, in
1809     *,f95,*)
1810       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1811       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1812       ;;
1813   esac
1814
1815   # If bootstrapping, C++ must be enabled.
1816   case ",$enable_languages,:$enable_bootstrap" in
1817     *,c++,*:*) ;;
1818     *:yes)
1819       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1820         enable_languages="${enable_languages},c++"
1821       else
1822         AC_MSG_ERROR([bootstrapping requires c++ sources])
1823       fi
1824       ;;
1825   esac
1826
1827   # First scan to see if an enabled language requires some other language.
1828   # We assume that a given config-lang.in will list all the language
1829   # front ends it requires, even if some are required indirectly.
1830   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1831     case ${lang_frag} in
1832       ..) ;;
1833       # The odd quoting in the next line works around
1834       # an apparent bug in bash 1.12 on linux.
1835       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1836       *)
1837         # From the config-lang.in, get $language, $lang_requires, and
1838         # $lang_requires_boot_languages.
1839         language=
1840         lang_requires=
1841         lang_requires_boot_languages=
1842         # set srcdir during sourcing lang_frag to the gcc dir.
1843         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
1844         # polutes this shell
1845         saved_srcdir=${srcdir}
1846         srcdir=${srcdir}/gcc . ${lang_frag}
1847         srcdir=${saved_srcdir}
1848         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1849           case ,${enable_languages}, in
1850             *,$other,*) ;;
1851             *,default,*) ;;
1852             *,all,*) ;;
1853             *,$language,*)
1854               echo " \`$other' language required by \`$language'; enabling" 1>&2
1855               enable_languages="${enable_languages},${other}"
1856               ;;
1857           esac
1858         done
1859         for other in ${lang_requires_boot_languages} ; do
1860           if test "$other" != "c"; then
1861             case ,${enable_stage1_languages}, in
1862               *,$other,*) ;;
1863               *,default,*) ;;
1864               *,all,*) ;;
1865               *)
1866                 case ,${enable_languages}, in
1867                   *,$language,*)
1868                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1869                     enable_stage1_languages="$enable_stage1_languages,${other}"
1870                     ;;
1871                 esac
1872                 ;;
1873             esac
1874           fi
1875         done
1876         ;;
1877     esac
1878   done
1879
1880   new_enable_languages=,c,
1881
1882   # If LTO is enabled, add the LTO front end.
1883   if test "$enable_lto" = "yes" ; then
1884     case ,${enable_languages}, in
1885       *,lto,*) ;;
1886       *) enable_languages="${enable_languages},lto" ;;
1887     esac
1888     if test "${build_lto_plugin}" = "yes" ; then
1889       configdirs="$configdirs lto-plugin"
1890     fi
1891   fi
1892
1893   # If we're building an offloading compiler, add the LTO front end.
1894   if test x"$enable_as_accelerator_for" != x ; then
1895     case ,${enable_languages}, in
1896       *,lto,*) ;;
1897       *) enable_languages="${enable_languages},lto" ;;
1898     esac
1899   fi
1900
1901   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
1902   potential_languages=,c,
1903
1904   enabled_target_libs=
1905   disabled_target_libs=
1906
1907   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1908     case ${lang_frag} in
1909       ..) ;;
1910       # The odd quoting in the next line works around
1911       # an apparent bug in bash 1.12 on linux.
1912       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1913       *)
1914         # From the config-lang.in, get $language, $target_libs,
1915         # $lang_dirs, $boot_language, and $build_by_default
1916         language=
1917         target_libs=
1918         lang_dirs=
1919         subdir_requires=
1920         boot_language=no
1921         build_by_default=yes
1922         # set srcdir during sourcing.  See above about save & restore
1923         saved_srcdir=${srcdir}
1924         srcdir=${srcdir}/gcc . ${lang_frag}
1925         srcdir=${saved_srcdir}
1926         if test x${language} = x; then
1927           echo "${lang_frag} doesn't set \$language." 1>&2
1928           exit 1
1929         fi
1930
1931         if test "$language" = "c++"; then
1932           boot_language=yes
1933         fi
1934
1935         add_this_lang=no
1936         # C is always enabled, so no need to add it again
1937         if test "$language" != "c"; then
1938           case ,${enable_languages}, in
1939             *,${language},*)
1940               # Language was explicitly selected; include it
1941               add_this_lang=yes
1942               ;;
1943             *,all,*)
1944               # All languages are enabled
1945               add_this_lang=all
1946               ;;
1947             *,default,*)
1948               # 'default' was selected, select it if it is a default language
1949               add_this_lang=${build_by_default}
1950               ;;
1951           esac
1952         fi
1953
1954         # Disable languages that need other directories if these aren't available.
1955         for i in $subdir_requires; do
1956           test -f "$srcdir/gcc/$i/config-lang.in" && continue
1957           case ${add_this_lang} in
1958             yes)
1959               # Specifically requested language; tell them.
1960               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
1961               ;;
1962             all)
1963               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
1964               add_this_lang=unsupported
1965               ;;
1966             *)
1967               # Silently disable.
1968               add_this_lang=unsupported
1969               ;;
1970           esac
1971         done
1972
1973         # Disable Ada if no preexisting GNAT is available.
1974         case ${add_this_lang}:${language}:${have_gnat} in
1975           yes:ada:no)
1976             # Specifically requested language; tell them.
1977             AC_MSG_ERROR([GNAT is required to build $language])
1978             ;;
1979           all:ada:no)
1980             AC_MSG_WARN([GNAT is required to build $language])
1981             add_this_lang=unsupported
1982             ;;
1983           *:ada:no)
1984             # Silently disable.
1985             add_this_lang=unsupported
1986             ;;
1987         esac
1988
1989         # Disable jit if -enable-host-shared not specified
1990         case ${add_this_lang}:${language}:${host_shared} in
1991           yes:jit:no)
1992             # PR jit/64780: explicitly specify --enable-host-shared
1993             AC_MSG_ERROR([
1994 Enabling language "jit" requires --enable-host-shared.
1995
1996 --enable-host-shared typically slows the rest of the compiler down by
1997 a few %, so you must explicitly enable it.
1998
1999 If you want to build both the jit and the regular compiler, it is often
2000 best to do this via two separate configure/builds, in separate
2001 directories, to avoid imposing the performance cost of
2002 --enable-host-shared on the regular compiler.])
2003             ;;
2004           all:jit:no)
2005             AC_MSG_WARN([--enable-host-shared required to build $language])
2006             add_this_lang=unsupported
2007             ;;
2008           *:jit:no)
2009             # Silently disable.
2010             add_this_lang=unsupported
2011             ;;
2012         esac
2013
2014         # Disable a language that is unsupported by the target.
2015         case "${add_this_lang}: $unsupported_languages " in
2016           no:*) ;;
2017           unsupported:*) ;;
2018           *:*" $language "*)
2019             AC_MSG_WARN([${language} not supported for this target])
2020             add_this_lang=unsupported
2021             ;;
2022         esac
2023
2024         case $add_this_lang in
2025           unsupported)
2026             # Remove language-dependent dirs.
2027             disabled_target_libs="$disabled_target_libs $target_libs"
2028             noconfigdirs="$noconfigdirs $lang_dirs"
2029             ;;
2030           no)
2031             # Remove language-dependent dirs; still show language as supported.
2032             disabled_target_libs="$disabled_target_libs $target_libs"
2033             noconfigdirs="$noconfigdirs $lang_dirs"
2034             potential_languages="${potential_languages}${language},"
2035             ;;
2036           all|yes)
2037             new_enable_languages="${new_enable_languages}${language},"
2038             potential_languages="${potential_languages}${language},"
2039             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2040             enabled_target_libs="$enabled_target_libs $target_libs"
2041             case "${boot_language}:,$enable_stage1_languages," in
2042               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2043                 # Add to (comma-separated) list of stage 1 languages.
2044                 case ",$stage1_languages," in
2045                   *,$language,* | ,yes, | ,all,) ;;
2046                   *) stage1_languages="${stage1_languages}${language}," ;;
2047                 esac
2048                 # We need to bootstrap any supporting libraries.
2049                 bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
2050                 ;;
2051             esac
2052             ;;
2053         esac
2054         ;;
2055     esac
2056   done
2057
2058   # Add target libraries which are only needed for disabled languages
2059   # to noconfigdirs.
2060   if test -n "$disabled_target_libs"; then
2061     for dir in $disabled_target_libs; do
2062       case " $enabled_target_libs " in
2063       *" ${dir} "*) ;;
2064       *) noconfigdirs="$noconfigdirs $dir" ;;
2065       esac
2066     done
2067   fi
2068
2069   AC_ARG_ENABLE(stage1-languages,
2070   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2071                   [choose additional languages to build during
2072                   stage1.  Mostly useful for compiler development])],
2073   [case ,${enable_stage1_languages}, in
2074     ,no,|,,)
2075       # Set it to something that will have no effect in the loop below
2076       enable_stage1_languages=c ;;
2077     ,yes,)
2078       enable_stage1_languages=`echo $new_enable_languages | \
2079         sed -e "s/^,//" -e "s/,$//" ` ;;
2080     *,all,*)
2081       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2082         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2083   esac
2084
2085   # Add "good" languages from enable_stage1_languages to stage1_languages,
2086   # while "bad" languages go in missing_languages.  Leave no duplicates.
2087   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2088     case $potential_languages in
2089       *,$i,*)
2090         case $stage1_languages in
2091           *,$i,*) ;;
2092           *) stage1_languages="$stage1_languages$i," ;;
2093         esac ;;
2094       *)
2095         case $missing_languages in
2096           *,$i,*) ;;
2097           *) missing_languages="$missing_languages$i," ;;
2098         esac ;;
2099      esac
2100   done])
2101
2102   # Remove leading/trailing commas that were added for simplicity
2103   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2104   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2105   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2106   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2107
2108   if test "x$missing_languages" != x; then
2109     AC_MSG_ERROR([
2110 The following requested languages could not be built: ${missing_languages}
2111 Supported languages are: ${potential_languages}])
2112   fi
2113   if test "x$new_enable_languages" != "x$enable_languages"; then
2114     echo The following languages will be built: ${new_enable_languages}
2115     enable_languages="$new_enable_languages"
2116   fi
2117
2118   AC_SUBST(stage1_languages)
2119   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2120 fi
2121
2122 # Handle --disable-<component> generically.
2123 for dir in $configdirs $build_configdirs $target_configdirs ; do
2124   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2125   varname=`echo $dirname | sed -e s/+/_/g`
2126   if eval test x\${enable_${varname}} "=" xno ; then
2127     noconfigdirs="$noconfigdirs $dir"
2128   fi
2129 done
2130
2131 # Check for Boehm's garbage collector
2132 AC_ARG_ENABLE(objc-gc,
2133 [AS_HELP_STRING([--enable-objc-gc],
2134                 [enable use of Boehm's garbage collector with the
2135                  GNU Objective-C runtime])])
2136 AC_ARG_WITH([target-bdw-gc],
2137 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2138                 [specify prefix directory for installed bdw-gc package.
2139                  Equivalent to --with-target-bdw-gc-include=PATH/include
2140                  plus --with-target-bdw-gc-lib=PATH/lib])])
2141 AC_ARG_WITH([target-bdw-gc-include],
2142 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2143                 [specify directories for installed bdw-gc include files])])
2144 AC_ARG_WITH([target-bdw-gc-lib],
2145 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2146                 [specify directories for installed bdw-gc library])])
2147
2148 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2149   AC_MSG_CHECKING([for bdw garbage collector])
2150   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2151     dnl no bdw-gw options, assume default locations
2152     AC_MSG_RESULT([using bdw-gc in default locations])
2153   else
2154     dnl bdw-gw options, first error checking, complete checking in libobjc
2155     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2156       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2157     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2158       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2159     else
2160       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2161     fi
2162   fi
2163 esac
2164
2165 # Disable libcilkrts, libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2166 case ,${enable_languages}, in
2167   *,c++,*)
2168     # Disable libcilkrts, libitm, libsanitizer if we're not building libstdc++
2169     case "${noconfigdirs}" in
2170       *target-libstdc++-v3*)
2171         noconfigdirs="$noconfigdirs target-libcilkrts target-libitm target-libsanitizer"
2172         ;;
2173       *) ;;
2174     esac
2175     ;;
2176   *)
2177     noconfigdirs="$noconfigdirs target-libcilkrts target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2178     ;;
2179 esac
2180
2181 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2182 # $build_configdirs and $target_configdirs.
2183 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2184
2185 notsupp=""
2186 for dir in . $skipdirs $noconfigdirs ; do
2187   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2188   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2189     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2190     if test -r $srcdir/$dirname/configure ; then
2191       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2192         true
2193       else
2194         notsupp="$notsupp $dir"
2195       fi
2196     fi
2197   fi
2198   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2199     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2200     if test -r $srcdir/$dirname/configure ; then
2201       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2202         true
2203       else
2204         notsupp="$notsupp $dir"
2205       fi
2206     fi
2207   fi
2208   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2209     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2210     if test -r $srcdir/$dirname/configure ; then
2211       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2212         true
2213       else
2214         notsupp="$notsupp $dir"
2215       fi
2216     fi
2217   fi
2218 done
2219
2220 # Quietly strip out all directories which aren't configurable in this tree.
2221 # This relies on all configurable subdirectories being autoconfiscated, which
2222 # is now the case.
2223 build_configdirs_all="$build_configdirs"
2224 build_configdirs=
2225 for i in ${build_configdirs_all} ; do
2226   j=`echo $i | sed -e s/build-//g`
2227   if test -f ${srcdir}/$j/configure ; then
2228     build_configdirs="${build_configdirs} $i"
2229   fi
2230 done
2231
2232 configdirs_all="$configdirs"
2233 configdirs=
2234 for i in ${configdirs_all} ; do
2235   if test -f ${srcdir}/$i/configure ; then
2236     configdirs="${configdirs} $i"
2237   fi
2238 done
2239
2240 target_configdirs_all="$target_configdirs"
2241 target_configdirs=
2242 for i in ${target_configdirs_all} ; do
2243   j=`echo $i | sed -e s/target-//g`
2244   if test -f ${srcdir}/$j/configure ; then
2245     target_configdirs="${target_configdirs} $i"
2246   fi
2247 done
2248
2249 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2250 # so we have to add it after the preceding checks.
2251 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2252 then
2253   case " $configdirs " in
2254     *" libiberty "*)
2255       # If we can build libiberty, we can also build libiberty-linker-plugin.
2256       configdirs="$configdirs libiberty-linker-plugin"
2257       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2258         --with-libiberty=../libiberty-linker-plugin";;
2259     *)
2260       AC_MSG_ERROR([libiberty missing]);;
2261   esac
2262 fi
2263
2264 # Sometimes we have special requirements for the host libiberty.
2265 extra_host_libiberty_configure_flags=
2266 extra_host_zlib_configure_flags=
2267 case " $configdirs " in
2268   *" lto-plugin "* | *" libcc1 "*)
2269     # When these are to be built as shared libraries, the same applies to
2270     # libiberty.
2271     extra_host_libiberty_configure_flags=--enable-shared
2272     ;;
2273   *" bfd "*)
2274     # When bfd is to be built as a shared library, the same applies to
2275     # zlib.
2276     if test "$enable_shared" = "yes"; then
2277       extra_host_zlib_configure_flags=--enable-host-shared
2278     fi
2279     ;;
2280 esac
2281 AC_SUBST(extra_host_libiberty_configure_flags)
2282 AC_SUBST(extra_host_zlib_configure_flags)
2283
2284 # Produce a warning message for the subdirs we can't configure.
2285 # This isn't especially interesting in the Cygnus tree, but in the individual
2286 # FSF releases, it's important to let people know when their machine isn't
2287 # supported by the one or two programs in a package.
2288
2289 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2290   # If $appdirs is non-empty, at least one of those directories must still
2291   # be configured, or we error out.  (E.g., if the gas release supports a
2292   # specified target in some subdirs but not the gas subdir, we shouldn't
2293   # pretend that all is well.)
2294   if test -n "$appdirs" ; then
2295     for dir in $appdirs ; do
2296       if test -r $dir/Makefile.in ; then
2297         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2298           appdirs=""
2299           break
2300         fi
2301         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2302           appdirs=""
2303           break
2304         fi
2305       fi
2306     done
2307     if test -n "$appdirs" ; then
2308       echo "*** This configuration is not supported by this package." 1>&2
2309       exit 1
2310     fi
2311   fi
2312   # Okay, some application will build, or we don't care to check.  Still
2313   # notify of subdirs not getting built.
2314   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2315   echo "    ${notsupp}" 1>&2
2316   echo "    (Any other directories should still work fine.)" 1>&2
2317 fi
2318
2319 case "$host" in
2320   *msdosdjgpp*)
2321     enable_gdbtk=no ;;
2322 esac
2323
2324 # To find our prefix, in gcc_cv_tool_prefix.
2325 ACX_TOOL_DIRS
2326
2327 copy_dirs=
2328
2329 AC_ARG_WITH([build-sysroot],
2330   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2331                   [use sysroot as the system root during the build])],
2332   [if test x"$withval" != x ; then
2333      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2334    fi],
2335   [SYSROOT_CFLAGS_FOR_TARGET=])
2336 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2337
2338 AC_ARG_WITH([debug-prefix-map],
2339   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2340                   [map A to B, C to D ... in debug information])],
2341   [if test x"$withval" != x; then
2342      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2343      for debug_map in $withval; do
2344        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2345      done
2346    fi],
2347   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2348 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2349
2350 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2351 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2352 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2353 # We want to ensure that TARGET libraries (which we know are built with
2354 # gcc) are built with "-O2 -g", so include those options when setting
2355 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2356 if test "x$CFLAGS_FOR_TARGET" = x; then
2357   if test "x${is_cross_compiler}" = xyes; then
2358     CFLAGS_FOR_TARGET="-g -O2"
2359   else
2360     CFLAGS_FOR_TARGET=$CFLAGS
2361     case " $CFLAGS " in
2362       *" -O2 "*) ;;
2363       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2364     esac
2365     case " $CFLAGS " in
2366       *" -g "* | *" -g3 "*) ;;
2367       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2368     esac
2369   fi
2370 fi
2371 AC_SUBST(CFLAGS_FOR_TARGET)
2372
2373 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2374   if test "x${is_cross_compiler}" = xyes; then
2375     CXXFLAGS_FOR_TARGET="-g -O2"
2376   else
2377     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2378     case " $CXXFLAGS " in
2379       *" -O2 "*) ;;
2380       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2381     esac
2382     case " $CXXFLAGS " in
2383       *" -g "* | *" -g3 "*) ;;
2384       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2385     esac
2386   fi
2387 fi
2388 AC_SUBST(CXXFLAGS_FOR_TARGET)
2389
2390 AC_SUBST(LDFLAGS_FOR_TARGET)
2391
2392 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2393 # the named directory are copied to $(tooldir)/sys-include.
2394 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2395   if test x${is_cross_compiler} = xno ; then
2396     echo 1>&2 '***' --with-headers is only supported when cross compiling
2397     exit 1
2398   fi
2399   if test x"${with_headers}" != xyes ; then
2400     x=${gcc_cv_tool_prefix}
2401     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2402   fi
2403 fi
2404
2405 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2406 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2407 # are permitted.
2408 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2409   if test x${is_cross_compiler} = xno ; then
2410     echo 1>&2 '***' --with-libs is only supported when cross compiling
2411     exit 1
2412   fi
2413   if test x"${with_libs}" != xyes ; then
2414     # Copy the libraries in reverse order, so that files in the first named
2415     # library override files in subsequent libraries.
2416     x=${gcc_cv_tool_prefix}
2417     for l in ${with_libs}; do
2418       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2419     done
2420   fi
2421 fi
2422
2423 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2424 #
2425 # This is done by determining whether or not the appropriate directory
2426 # is available, and by checking whether or not specific configurations
2427 # have requested that this magic not happen.
2428 #
2429 # The command line options always override the explicit settings in
2430 # configure.ac, and the settings in configure.ac override this magic.
2431 #
2432 # If the default for a toolchain is to use GNU as and ld, and you don't
2433 # want to do that, then you should use the --without-gnu-as and
2434 # --without-gnu-ld options for the configure script.  Similarly, if
2435 # the default is to use the included zlib and you don't want to do that,
2436 # you should use the --with-system-zlib option for the configure script.
2437
2438 if test x${use_gnu_as} = x &&
2439    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2440   with_gnu_as=yes
2441   extra_host_args="$extra_host_args --with-gnu-as"
2442 fi
2443
2444 if test x${use_gnu_ld} = x &&
2445    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2446   with_gnu_ld=yes
2447   extra_host_args="$extra_host_args --with-gnu-ld"
2448 fi
2449
2450 if test x${use_included_zlib} = x &&
2451    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2452   :
2453 else
2454   with_system_zlib=yes
2455   extra_host_args="$extra_host_args --with-system-zlib"
2456 fi
2457
2458 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2459 # can detect this case.
2460
2461 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2462   with_newlib=yes
2463   extra_host_args="$extra_host_args --with-newlib"
2464 fi
2465
2466 # Handle ${copy_dirs}
2467 set fnord ${copy_dirs}
2468 shift
2469 while test $# != 0 ; do
2470   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2471     :
2472   else
2473     echo Copying $1 to $2
2474
2475     # Use the install script to create the directory and all required
2476     # parent directories.
2477     if test -d $2 ; then
2478       :
2479     else
2480       echo >config.temp
2481       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2482     fi
2483
2484     # Copy the directory, assuming we have tar.
2485     # FIXME: Should we use B in the second tar?  Not all systems support it.
2486     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2487
2488     # It is the responsibility of the user to correctly adjust all
2489     # symlinks.  If somebody can figure out how to handle them correctly
2490     # here, feel free to add the code.
2491
2492     echo $1 > $2/COPIED
2493   fi
2494   shift; shift
2495 done
2496
2497 # Determine a target-dependent exec_prefix that the installed
2498 # gcc will search in.  Keep this list sorted by triplet, with
2499 # the *-*-osname triplets last.
2500 md_exec_prefix=
2501 case "${target}" in
2502   i[[34567]]86-pc-msdosdjgpp*)
2503     md_exec_prefix=/dev/env/DJDIR/bin
2504     ;;
2505   *-*-hpux* | \
2506   *-*-nto-qnx* | \
2507   *-*-solaris2*)
2508     md_exec_prefix=/usr/ccs/bin
2509     ;;
2510 esac
2511
2512 extra_arflags_for_target=
2513 extra_nmflags_for_target=
2514 extra_ranlibflags_for_target=
2515 target_makefile_frag=/dev/null
2516 case "${target}" in
2517   spu-*-*)
2518     target_makefile_frag="config/mt-spu"
2519     ;;
2520   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2521     target_makefile_frag="config/mt-sde"
2522     ;;
2523   mipsisa*-*-elfoabi*)
2524     target_makefile_frag="config/mt-mips-elfoabi"
2525     ;;
2526   mips*-*-*linux* | mips*-*-gnu*)
2527     target_makefile_frag="config/mt-mips-gnu"
2528     ;;
2529   nios2-*-elf*)
2530     target_makefile_frag="config/mt-nios2-elf"
2531     ;;
2532   *-*-linux-android*)
2533     target_makefile_frag="config/mt-android"
2534     ;;
2535   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2536     target_makefile_frag="config/mt-gnu"
2537     ;;
2538   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2539     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2540     # commands to handle both 32-bit and 64-bit objects.  These flags are
2541     # harmless if we're using GNU nm or ar.
2542     extra_arflags_for_target=" -X32_64"
2543     extra_nmflags_for_target=" -B -X32_64"
2544     ;;
2545 esac
2546
2547 alphaieee_frag=/dev/null
2548 case $target in
2549   alpha*-*-*)
2550     # This just makes sure to use the -mieee option to build target libs.
2551     # This should probably be set individually by each library.
2552     alphaieee_frag="config/mt-alphaieee"
2553     ;;
2554 esac
2555
2556 # If --enable-target-optspace always use -Os instead of -O2 to build
2557 # the target libraries, similarly if it is not specified, use -Os
2558 # on selected platforms.
2559 ospace_frag=/dev/null
2560 case "${enable_target_optspace}:${target}" in
2561   yes:*)
2562     ospace_frag="config/mt-ospace"
2563     ;;
2564   :d30v-*)
2565     ospace_frag="config/mt-d30v"
2566     ;;
2567   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2568     ospace_frag="config/mt-ospace"
2569     ;;
2570   no:* | :*)
2571     ;;
2572   *)
2573     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2574     ;;
2575 esac
2576
2577 # Some systems (e.g., one of the i386-aix systems the gas testers are
2578 # using) don't handle "\$" correctly, so don't use it here.
2579 tooldir='${exec_prefix}'/${target_noncanonical}
2580 build_tooldir=${tooldir}
2581
2582 # Create a .gdbinit file which runs the one in srcdir
2583 # and tells GDB to look there for source files.
2584
2585 if test -r ${srcdir}/.gdbinit ; then
2586   case ${srcdir} in
2587     .) ;;
2588     *) cat > ./.gdbinit <<EOF
2589 # ${NO_EDIT}
2590 dir ${srcdir}
2591 dir .
2592 source ${srcdir}/.gdbinit
2593 EOF
2594     ;;
2595   esac
2596 fi
2597
2598 # Make sure that the compiler is able to generate an executable.  If it
2599 # can't, we are probably in trouble.  We don't care whether we can run the
2600 # executable--we might be using a cross compiler--we only care whether it
2601 # can be created.  At this point the main configure script has set CC.
2602 we_are_ok=no
2603 echo "int main () { return 0; }" > conftest.c
2604 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2605 if test $? = 0 ; then
2606   if test -s conftest || test -s conftest.exe ; then
2607     we_are_ok=yes
2608   fi
2609 fi
2610 case $we_are_ok in
2611   no)
2612     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2613     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2614     rm -f conftest*
2615     exit 1
2616     ;;
2617 esac
2618 rm -f conftest*
2619
2620 # Decide which environment variable is used to find dynamic libraries.
2621 case "${host}" in
2622   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2623   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2624   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2625   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2626 esac
2627
2628 # On systems where the dynamic library environment variable is PATH,
2629 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2630 # built executables to PATH.
2631 if test "$RPATH_ENVVAR" = PATH; then
2632   GCC_SHLIB_SUBDIR=/shlib
2633 else
2634   GCC_SHLIB_SUBDIR=
2635 fi
2636
2637 # Adjust the toplevel makefile according to whether bootstrap was selected.
2638 case $enable_bootstrap in
2639   yes)
2640     bootstrap_suffix=bootstrap
2641     BUILD_CONFIG=bootstrap-debug
2642     ;;
2643   no)
2644     bootstrap_suffix=no-bootstrap
2645     BUILD_CONFIG=
2646     ;;
2647 esac
2648
2649 AC_MSG_CHECKING(for default BUILD_CONFIG)
2650
2651 AC_ARG_WITH([build-config],
2652   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2653                   [use config/NAME.mk build configuration])],
2654   [case $with_build_config in
2655    yes) with_build_config= ;;
2656    no) with_build_config= BUILD_CONFIG= ;;
2657    esac])
2658
2659 if test "x${with_build_config}" != x; then
2660   BUILD_CONFIG=$with_build_config
2661 else
2662   case $BUILD_CONFIG in
2663   bootstrap-debug)
2664     if echo "int f (void) { return 0; }" > conftest.c &&
2665        ${CC} -c conftest.c &&
2666        mv conftest.o conftest.o.g0 &&
2667        ${CC} -c -g conftest.c &&
2668        mv conftest.o conftest.o.g &&
2669        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2670       :
2671     else
2672       BUILD_CONFIG=
2673     fi
2674     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2675     ;;
2676   esac
2677 fi
2678 AC_MSG_RESULT($BUILD_CONFIG)
2679 AC_SUBST(BUILD_CONFIG)
2680
2681 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2682 AC_MSG_CHECKING([for --enable-vtable-verify])
2683 AC_ARG_ENABLE(vtable-verify,
2684 [AS_HELP_STRING([--enable-vtable-verify],
2685                 [Enable vtable verification feature])],
2686 [case "$enableval" in
2687  yes) enable_vtable_verify=yes ;;
2688  no)  enable_vtable_verify=no ;;
2689  *)   enable_vtable_verify=no;;
2690  esac],
2691 [enable_vtable_verify=no])
2692 AC_MSG_RESULT($enable_vtable_verify)
2693
2694 # Record target_configdirs and the configure arguments for target and
2695 # build configuration in Makefile.
2696 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2697 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2698 bootstrap_fixincludes=no
2699
2700 # If we are building libgomp, bootstrap it.
2701 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2702   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2703 fi
2704
2705 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2706 # or bootstrap-ubsan, bootstrap it.
2707 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2708   case "$BUILD_CONFIG" in
2709     *bootstrap-asan* | *bootstrap-ubsan* )
2710       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2711       bootstrap_fixincludes=yes
2712       ;;
2713   esac
2714 fi
2715
2716 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2717 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2718    test "$enable_vtable_verify" != no; then
2719   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2720 fi
2721
2722 # If we are building libmpx and $BUILD_CONFIG contains bootstrap-mpx,
2723 # bootstrap it.
2724 if echo " ${target_configdirs} " | grep " libmpx " > /dev/null 2>&1; then
2725   case "$BUILD_CONFIG" in
2726     *bootstrap-mpx* )
2727       bootstrap_target_libs=${bootstrap_target_libs}target-libmpx,
2728       ;;
2729   esac
2730 fi
2731
2732 # Determine whether gdb needs tk/tcl or not.
2733 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2734 # and in that case we want gdb to be built without tk.  Ugh!
2735 # In fact I believe gdb is the *only* package directly dependent on tk,
2736 # so we should be able to put the 'maybe's in unconditionally and
2737 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2738 # 100% sure that that's safe though.
2739
2740 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2741 case "$enable_gdbtk" in
2742   no)
2743     GDB_TK="" ;;
2744   yes)
2745     GDB_TK="${gdb_tk}" ;;
2746   *)
2747     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2748     # distro.  Eventually someone will fix this and move Insight, nee
2749     # gdbtk to a separate directory.
2750     if test -d ${srcdir}/gdb/gdbtk ; then
2751       GDB_TK="${gdb_tk}"
2752     else
2753       GDB_TK=""
2754     fi
2755     ;;
2756 esac
2757 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2758 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2759
2760 # Strip out unwanted targets.
2761
2762 # While at that, we remove Makefiles if we were started for recursive
2763 # configuration, so that the top-level Makefile reconfigures them,
2764 # like we used to do when configure itself was recursive.
2765
2766 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2767 # but now we're fixing up the Makefile ourselves with the additional
2768 # commands passed to AC_CONFIG_FILES.  Use separate variables
2769 # extrasub-{build,host,target} not because there is any reason to split
2770 # the substitutions up that way, but only to remain below the limit of
2771 # 99 commands in a script, for HP-UX sed.
2772 # Do not nest @if/@endif pairs, because configure will not warn you at all.
2773
2774 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2775   yes:yes:*\ gold\ *:*,c++,*) ;;
2776   yes:yes:*\ gold\ *:*)
2777     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2778     ;;
2779 esac
2780
2781 extrasub_build=
2782 for module in ${build_configdirs} ; do
2783   if test -z "${no_recursion}" \
2784      && test -f ${build_subdir}/${module}/Makefile; then
2785     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2786     rm -f ${build_subdir}/${module}/Makefile
2787   fi
2788   extrasub_build="$extrasub_build
2789 /^@if build-$module\$/d
2790 /^@endif build-$module\$/d
2791 /^@if build-$module-$bootstrap_suffix\$/d
2792 /^@endif build-$module-$bootstrap_suffix\$/d"
2793 done
2794 extrasub_host=
2795 for module in ${configdirs} ; do
2796   if test -z "${no_recursion}"; then
2797     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2798       if test -f ${file}; then
2799         echo 1>&2 "*** removing ${file} to force reconfigure"
2800         rm -f ${file}
2801       fi
2802     done
2803   fi
2804   case ${module},${bootstrap_fixincludes} in
2805     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2806     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2807   esac
2808   extrasub_host="$extrasub_host
2809 /^@if $module\$/d
2810 /^@endif $module\$/d
2811 /^@if $module-$host_bootstrap_suffix\$/d
2812 /^@endif $module-$host_bootstrap_suffix\$/d"
2813 done
2814 extrasub_target=
2815 for module in ${target_configdirs} ; do
2816   if test -z "${no_recursion}" \
2817      && test -f ${target_subdir}/${module}/Makefile; then
2818     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2819     rm -f ${target_subdir}/${module}/Makefile
2820   fi
2821
2822   # We only bootstrap target libraries listed in bootstrap_target_libs.
2823   case $bootstrap_target_libs in
2824     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2825     *) target_bootstrap_suffix=no-bootstrap ;;
2826   esac
2827
2828   extrasub_target="$extrasub_target
2829 /^@if target-$module\$/d
2830 /^@endif target-$module\$/d
2831 /^@if target-$module-$target_bootstrap_suffix\$/d
2832 /^@endif target-$module-$target_bootstrap_suffix\$/d"
2833 done
2834
2835 # Do the final fixup along with target modules.
2836 extrasub_target="$extrasub_target
2837 /^@if /,/^@endif /d"
2838
2839 # Create the serialization dependencies.  This uses a temporary file.
2840
2841 AC_ARG_ENABLE([serial-configure],
2842 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
2843                 [force sequential configuration of
2844                  sub-packages for the host, target or build
2845                  machine, or all sub-packages])])
2846
2847 case ${enable_serial_configure} in
2848   yes)
2849     enable_serial_build_configure=yes
2850     enable_serial_host_configure=yes
2851     enable_serial_target_configure=yes
2852     ;;
2853 esac
2854
2855 # These force 'configure's to be done one at a time, to avoid problems
2856 # with contention over a shared config.cache.
2857 rm -f serdep.tmp
2858 echo '# serdep.tmp' > serdep.tmp
2859 olditem=
2860 test "x${enable_serial_build_configure}" = xyes &&
2861 for item in ${build_configdirs} ; do
2862   case ${olditem} in
2863     "") ;;
2864     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
2865   esac
2866   olditem=${item}
2867 done
2868 olditem=
2869 test "x${enable_serial_host_configure}" = xyes &&
2870 for item in ${configdirs} ; do
2871   case ${olditem} in
2872     "") ;;
2873     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
2874   esac
2875   olditem=${item}
2876 done
2877 olditem=
2878 test "x${enable_serial_target_configure}" = xyes &&
2879 for item in ${target_configdirs} ; do
2880   case ${olditem} in
2881     "") ;;
2882     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
2883   esac
2884   olditem=${item}
2885 done
2886 serialization_dependencies=serdep.tmp
2887 AC_SUBST_FILE(serialization_dependencies)
2888
2889 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
2890 # target, nonopt, and variable assignments.  These are the ones we
2891 # might not want to pass down to subconfigures.  The exception being
2892 # --cache-file=/dev/null, which is used to turn off the use of cache
2893 # files altogether, and which should be passed on to subconfigures.
2894 # Also strip program-prefix, program-suffix, and program-transform-name,
2895 # so that we can pass down a consistent program-transform-name.
2896 baseargs=
2897 tbaseargs=
2898 keep_next=no
2899 skip_next=no
2900 eval "set -- $ac_configure_args"
2901 for ac_arg
2902 do
2903   if test X"$skip_next" = X"yes"; then
2904     skip_next=no
2905     continue
2906   fi
2907   if test X"$keep_next" = X"yes"; then
2908     case $ac_arg in
2909       *\'*)
2910         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2911     esac
2912     baseargs="$baseargs '$ac_arg'"
2913     tbaseargs="$tbaseargs '$ac_arg'"
2914     keep_next=no
2915     continue
2916   fi
2917
2918   # Handle separated arguments.  Based on the logic generated by
2919   # autoconf 2.59.
2920   case $ac_arg in
2921     *=* | --config-cache | -C | -disable-* | --disable-* \
2922       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
2923       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
2924       | -with-* | --with-* | -without-* | --without-* | --x)
2925       separate_arg=no
2926       ;;
2927     -*)
2928       separate_arg=yes
2929       ;;
2930     *)
2931       separate_arg=no
2932       ;;
2933   esac
2934
2935   skip_targ=no
2936   case $ac_arg in
2937 changequote(,)
2938   --with-* | --without-*)
2939     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
2940
2941     case $libopt in
2942     *[-_]include)
2943       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
2944       ;;
2945     *[-_]lib)
2946       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
2947       ;;
2948     *)
2949       lib=$libopt
2950       ;;
2951     esac
2952 changequote([,])
2953
2954     case $lib in
2955     mpc | mpfr | gmp | isl)
2956       # If we're processing --with-$lib, --with-$lib-include or
2957       # --with-$lib-lib, for one of the libs above, and target is
2958       # different from host, don't pass the current argument to any
2959       # target library's configure.
2960       if test x$is_cross_compiler = xyes; then
2961         skip_targ=yes
2962       fi
2963       ;;
2964     esac
2965     ;;
2966   esac
2967
2968   case "$ac_arg" in
2969     --cache-file=/dev/null | \
2970     -cache-file=/dev/null )
2971       # Handled here to avoid the test to skip args below.
2972       baseargs="$baseargs '$ac_arg'"
2973       tbaseargs="$tbaseargs '$ac_arg'"
2974       # Assert: $separate_arg should always be no.
2975       keep_next=$separate_arg
2976       ;;
2977     --no*)
2978       continue
2979       ;;
2980     --c* | \
2981     --sr* | \
2982     --ho* | \
2983     --bu* | \
2984     --t* | \
2985     --program-* | \
2986     -cache_file* | \
2987     -srcdir* | \
2988     -host* | \
2989     -build* | \
2990     -target* | \
2991     -program-prefix* | \
2992     -program-suffix* | \
2993     -program-transform-name* )
2994       skip_next=$separate_arg
2995       continue
2996       ;;
2997     -*)
2998       # An option.  Add it.
2999       case $ac_arg in
3000         *\'*)
3001           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3002       esac
3003       baseargs="$baseargs '$ac_arg'"
3004       if test X"$skip_targ" = Xno; then
3005         tbaseargs="$tbaseargs '$ac_arg'"
3006       fi
3007       keep_next=$separate_arg
3008       ;;
3009     *)
3010       # Either a variable assignment, or a nonopt (triplet).  Don't
3011       # pass it down; let the Makefile handle this.
3012       continue
3013       ;;
3014   esac
3015 done
3016 # Remove the initial space we just introduced and, as these will be
3017 # expanded by make, quote '$'.
3018 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3019
3020 # Add in --program-transform-name, after --program-prefix and
3021 # --program-suffix have been applied to it.  Autoconf has already
3022 # doubled dollar signs and backslashes in program_transform_name; we want
3023 # the backslashes un-doubled, and then the entire thing wrapped in single
3024 # quotes, because this will be expanded first by make and then by the shell.
3025 # Also, because we want to override the logic in subdir configure scripts to
3026 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3027 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3028 ${program_transform_name}
3029 EOF_SED
3030 gcc_transform_name=`cat conftestsed.out`
3031 rm -f conftestsed.out
3032 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3033 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3034 if test "$silent" = yes; then
3035   baseargs="$baseargs --silent"
3036   tbaseargs="$tbaseargs --silent"
3037 fi
3038 baseargs="$baseargs --disable-option-checking"
3039 tbaseargs="$tbaseargs --disable-option-checking"
3040
3041 # Record and document user additions to sub configure arguments.
3042 AC_ARG_VAR([build_configargs],
3043            [additional configure arguments for build directories])
3044 AC_ARG_VAR([host_configargs],
3045            [additional configure arguments for host directories])
3046 AC_ARG_VAR([target_configargs],
3047            [additional configure arguments for target directories])
3048
3049 # For the build-side libraries, we just need to pretend we're native,
3050 # and not use the same cache file.  Multilibs are neither needed nor
3051 # desired.  We can't even use the same cache file for all build-side
3052 # libraries, as they're compiled differently; some with C, some with
3053 # C++ or with different feature-enabling options.
3054 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3055
3056 # For host modules, accept cache file option, or specification as blank.
3057 case "${cache_file}" in
3058 "") # empty
3059   cache_file_option="" ;;
3060 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3061   cache_file_option="--cache-file=${cache_file}" ;;
3062 *) # relative path
3063   cache_file_option="--cache-file=../${cache_file}" ;;
3064 esac
3065
3066 # Host dirs don't like to share a cache file either, horribly enough.
3067 # This seems to be due to autoconf 2.5x stupidity.
3068 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3069
3070 target_configargs="$target_configargs ${tbaseargs}"
3071
3072 # Passing a --with-cross-host argument lets the target libraries know
3073 # whether they are being built with a cross-compiler or being built
3074 # native.  However, it would be better to use other mechanisms to make the
3075 # sorts of decisions they want to make on this basis.  Please consider
3076 # this option to be deprecated.  FIXME.
3077 if test x${is_cross_compiler} = xyes ; then
3078   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3079 fi
3080
3081 # Special user-friendly check for native x86_64-linux build, if
3082 # multilib is not explicitly enabled.
3083 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3084   x86_64-*linux*:yes:$build:$build:)
3085     # Make sure we have a development environment that handles 32-bit
3086     dev64=no
3087     echo "int main () { return 0; }" > conftest.c
3088     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3089     if test $? = 0 ; then
3090       if test -s conftest || test -s conftest.exe ; then
3091         dev64=yes
3092       fi
3093     fi
3094     rm -f conftest*
3095     if test x${dev64} != xyes ; then
3096       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.])
3097     fi
3098     ;;
3099 esac
3100
3101 # Default to --enable-multilib.
3102 if test x${enable_multilib} = x ; then
3103   target_configargs="--enable-multilib ${target_configargs}"
3104 fi
3105
3106 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3107 # changed from the earlier setting of with_newlib.
3108 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3109   target_configargs="--with-newlib ${target_configargs}"
3110 fi
3111
3112 # Different target subdirs use different values of certain variables
3113 # (notably CXX).  Worse, multilibs use *lots* of different values.
3114 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3115 # it doesn't automatically accept command-line overrides of them.
3116 # This means it's not safe for target subdirs to share a cache file,
3117 # which is disgusting, but there you have it.  Hopefully this can be
3118 # fixed in future.  It's still worthwhile to use a cache file for each
3119 # directory.  I think.
3120
3121 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3122 # We need to pass --target, as newer autoconf's requires consistency
3123 # for target_alias and gcc doesn't manage it consistently.
3124 target_configargs="--cache-file=./config.cache ${target_configargs}"
3125
3126 FLAGS_FOR_TARGET=
3127 case " $target_configdirs " in
3128  *" newlib "*)
3129   case " $target_configargs " in
3130   *" --with-newlib "*)
3131    case "$target" in
3132     *-cygwin*)
3133       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3134       ;;
3135    esac
3136
3137    # If we're not building GCC, don't discard standard headers.
3138    if test -d ${srcdir}/gcc; then
3139      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3140
3141      if test "${build}" != "${host}"; then
3142        # On Canadian crosses, CC_FOR_TARGET will have already been set
3143        # by `configure', so we won't have an opportunity to add -Bgcc/
3144        # to it.  This is right: we don't want to search that directory
3145        # for binaries, but we want the header files in there, so add
3146        # them explicitly.
3147        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3148
3149        # Someone might think of using the pre-installed headers on
3150        # Canadian crosses, in case the installed compiler is not fully
3151        # compatible with the compiler being built.  In this case, it
3152        # would be better to flag an error than risking having
3153        # incompatible object files being constructed.  We can't
3154        # guarantee that an error will be flagged, but let's hope the
3155        # compiler will do it, when presented with incompatible header
3156        # files.
3157      fi
3158    fi
3159
3160    case "${target}-${is_cross_compiler}" in
3161    i[[3456789]]86-*-linux*-no)
3162       # Here host == target, so we don't need to build gcc,
3163       # so we don't want to discard standard headers.
3164       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3165       ;;
3166    *)
3167       # If we're building newlib, use its generic headers last, but search
3168       # for any libc-related directories first (so make it the last -B
3169       # switch).
3170       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3171
3172       # If we're building libgloss, find the startup file, simulator library
3173       # and linker script.
3174       case " $target_configdirs " in
3175         *" libgloss "*)
3176         # Look for startup file, simulator library and maybe linker script.
3177         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3178         # Look for libnosys.a in case the target needs it.
3179         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3180         # Most targets have the linker script in the source directory.
3181         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3182         ;;
3183       esac
3184       ;;
3185    esac
3186    ;;
3187   esac
3188   ;;
3189 esac
3190
3191 case "$target" in
3192   x86_64-*mingw* | *-w64-mingw*)
3193   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3194   # however, use a symlink named 'mingw' in ${prefix} .
3195     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3196     ;;
3197   *-mingw*)
3198   # MinGW can't be handled as Cygwin above since it does not use newlib.
3199     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3200     ;;
3201 esac
3202
3203 # Allow the user to override the flags for
3204 # our build compiler if desired.
3205 if test x"${build}" = x"${host}" ; then
3206   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3207   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3208   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3209 fi
3210
3211 # On Canadian crosses, we'll be searching the right directories for
3212 # the previously-installed cross compiler, so don't bother to add
3213 # flags for directories within the install tree of the compiler
3214 # being built; programs in there won't even run.
3215 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3216   # Search for pre-installed headers if nothing else fits.
3217   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3218 fi
3219
3220 if test "x${use_gnu_ld}" = x &&
3221    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3222   # Arrange for us to find uninstalled linker scripts.
3223   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3224 fi
3225
3226 # Search for other target-specific linker scripts and such.
3227 case "${target}" in
3228   mep*)
3229     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3230     ;;
3231 esac
3232
3233 # Makefile fragments.
3234 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3235 do
3236   eval fragval=\$$frag
3237   if test $fragval != /dev/null; then
3238     eval $frag=${srcdir}/$fragval
3239   fi
3240 done
3241 AC_SUBST_FILE(host_makefile_frag)
3242 AC_SUBST_FILE(target_makefile_frag)
3243 AC_SUBST_FILE(alphaieee_frag)
3244 AC_SUBST_FILE(ospace_frag)
3245
3246 # Miscellanea: directories, flags, etc.
3247 AC_SUBST(RPATH_ENVVAR)
3248 AC_SUBST(GCC_SHLIB_SUBDIR)
3249 AC_SUBST(tooldir)
3250 AC_SUBST(build_tooldir)
3251 AC_SUBST(CONFIGURE_GDB_TK)
3252 AC_SUBST(GDB_TK)
3253 AC_SUBST(INSTALL_GDB_TK)
3254
3255 # Build module lists & subconfigure args.
3256 AC_SUBST(build_configargs)
3257 AC_SUBST(build_configdirs)
3258
3259 # Host module lists & subconfigure args.
3260 AC_SUBST(host_configargs)
3261 AC_SUBST(configdirs)
3262 AC_SUBST(target_configdirs)
3263
3264 # Target module lists & subconfigure args.
3265 AC_SUBST(target_configargs)
3266
3267
3268 # Build tools.
3269 AC_SUBST(AR_FOR_BUILD)
3270 AC_SUBST(AS_FOR_BUILD)
3271 AC_SUBST(CC_FOR_BUILD)
3272 AC_SUBST(CFLAGS_FOR_BUILD)
3273 AC_SUBST(CXXFLAGS_FOR_BUILD)
3274 AC_SUBST(CXX_FOR_BUILD)
3275 AC_SUBST(DLLTOOL_FOR_BUILD)
3276 AC_SUBST(GFORTRAN_FOR_BUILD)
3277 AC_SUBST(GOC_FOR_BUILD)
3278 AC_SUBST(LDFLAGS_FOR_BUILD)
3279 AC_SUBST(LD_FOR_BUILD)
3280 AC_SUBST(NM_FOR_BUILD)
3281 AC_SUBST(RANLIB_FOR_BUILD)
3282 AC_SUBST(WINDMC_FOR_BUILD)
3283 AC_SUBST(WINDRES_FOR_BUILD)
3284
3285 # Generate default definitions for YACC, M4, LEX and other programs that run
3286 # on the build machine.  These are used if the Makefile can't locate these
3287 # programs in objdir.
3288 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3289
3290 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3291 case " $build_configdirs " in
3292   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3293 esac
3294
3295 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3296 case " $build_configdirs " in
3297   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3298 esac
3299
3300 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3301 case " $build_configdirs " in
3302   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3303 esac
3304
3305 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3306 case " $build_configdirs " in
3307   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3308   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3309 esac
3310
3311 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3312 case " $build_configdirs " in
3313   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3314 esac
3315
3316 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3317 case " $build_configdirs " in
3318   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3319   *)
3320 changequote(,)
3321     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3322     # higher, else we use the "missing" dummy.
3323     if ${MAKEINFO} --version \
3324        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3325       :
3326     else
3327       MAKEINFO="$MISSING makeinfo"
3328     fi
3329     ;;
3330 changequote([,])
3331 esac
3332
3333 # FIXME: expect and dejagnu may become build tools?
3334
3335 AC_CHECK_PROGS(EXPECT, expect, expect)
3336 case " $configdirs " in
3337   *" expect "*)
3338     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3339     ;;
3340 esac
3341
3342 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3343 case " $configdirs " in
3344   *" dejagnu "*)
3345     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3346     ;;
3347 esac
3348
3349
3350 # Host tools.
3351 NCN_STRICT_CHECK_TOOLS(AR, ar)
3352 NCN_STRICT_CHECK_TOOLS(AS, as)
3353 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3354 NCN_STRICT_CHECK_TOOLS(LD, ld)
3355 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3356 NCN_STRICT_CHECK_TOOLS(NM, nm)
3357 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3358 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3359 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3360 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3361 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3362 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3363 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3364 AC_SUBST(CC)
3365 AC_SUBST(CXX)
3366 AC_SUBST(CFLAGS)
3367 AC_SUBST(CXXFLAGS)
3368
3369 # Target tools.
3370 AC_ARG_WITH([build-time-tools],
3371   [AS_HELP_STRING([--with-build-time-tools=PATH],
3372                   [use given path to find target tools during the build])],
3373   [case x"$withval" in
3374      x/*) ;;
3375      *)
3376        with_build_time_tools=
3377        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3378        ;;
3379    esac],
3380   [with_build_time_tools=])
3381
3382 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3383 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3384 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3385 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3386 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3387
3388 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3389 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3390 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3391 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3392 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3393 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3394 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3395 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
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$$r/$(HOST_SUBDIR)/gcc/], go)
3420 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3421 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3422 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3423 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3424 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3425 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3426 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3427 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3428 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3429 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3430
3431 AC_SUBST(FLAGS_FOR_TARGET)
3432 AC_SUBST(RAW_CXX_FOR_TARGET)
3433
3434 # Certain tools may need extra flags.
3435 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3436 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3437 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3438
3439 # When building target libraries, except in a Canadian cross, we use
3440 # the same toolchain as the compiler we just built.
3441 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3442 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3443 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3444 if test $host = $build; then
3445   case " $configdirs " in
3446     *" gcc "*)
3447       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3448       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3449       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3450       ;;
3451   esac
3452 fi
3453
3454 AC_SUBST(COMPILER_AS_FOR_TARGET)
3455 AC_SUBST(COMPILER_LD_FOR_TARGET)
3456 AC_SUBST(COMPILER_NM_FOR_TARGET)
3457
3458 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3459 AC_ARG_ENABLE(maintainer-mode,
3460 [AS_HELP_STRING([--enable-maintainer-mode],
3461                 [enable make rules and dependencies not useful
3462                  (and sometimes confusing) to the casual installer])],
3463       USE_MAINTAINER_MODE=$enableval,
3464       USE_MAINTAINER_MODE=no)
3465 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3466 AC_SUBST(MAINTAINER_MODE_TRUE)
3467 AC_SUBST(MAINTAINER_MODE_FALSE)
3468 if test "$USE_MAINTAINER_MODE" = yes; then
3469   MAINTAINER_MODE_TRUE=
3470   MAINTAINER_MODE_FALSE='#'
3471 else
3472   MAINTAINER_MODE_TRUE='#'
3473   MAINTAINER_MODE_FALSE=
3474 fi
3475 MAINT=$MAINTAINER_MODE_TRUE
3476 AC_SUBST(MAINT)dnl
3477
3478 # ---------------------
3479 # GCC bootstrap support
3480 # ---------------------
3481
3482 # Stage specific cflags for build.
3483 stage1_cflags="-g"
3484 case $build in
3485   vax-*-*)
3486     case ${GCC} in
3487       yes) stage1_cflags="-g -Wa,-J" ;;
3488       *) stage1_cflags="-g -J" ;;
3489     esac ;;
3490 esac
3491
3492 AC_SUBST(stage1_cflags)
3493
3494 # Enable --enable-checking in stage1 of the compiler.
3495 AC_ARG_ENABLE(stage1-checking,
3496 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3497                 [choose additional checking for stage1 of the compiler])],
3498 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3499 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3500   # For --disable-checking or implicit --enable-checking=release, avoid
3501   # setting --enable-checking=gc in the default stage1 checking for LTO
3502   # bootstraps.  See PR62077.
3503   case $BUILD_CONFIG in
3504     *lto*)
3505       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3506     *)
3507       stage1_checking=--enable-checking=yes,types;;
3508   esac
3509   if test "x$enable_checking" = x && \
3510      test -d ${srcdir}/gcc && \
3511      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3512     stage1_checking=--enable-checking=yes,types,extra
3513   fi
3514 else
3515   stage1_checking=--enable-checking=$enable_checking,types
3516 fi])
3517 AC_SUBST(stage1_checking)
3518
3519 # Enable -Werror in bootstrap stage2 and later.
3520 AC_ARG_ENABLE(werror,
3521 [AS_HELP_STRING([--enable-werror],
3522                 [enable -Werror in bootstrap stage2 and later])],
3523 [
3524 case ${enable_werror} in
3525   yes) stage2_werror_flag="--enable-werror-always" ;;
3526   *) stage2_werror_flag="" ;;
3527 esac
3528 ],
3529 [
3530 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3531   case $BUILD_CONFIG in
3532   bootstrap-debug)
3533       stage2_werror_flag="--enable-werror-always" ;;
3534   "")
3535       stage2_werror_flag="--enable-werror-always" ;;
3536   esac
3537 fi
3538 ])
3539
3540 AC_SUBST(stage2_werror_flag)
3541
3542 # Specify what files to not compare during bootstrap.
3543
3544 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3545 case "$target" in
3546   hppa*64*-*-hpux*) ;;
3547   hppa*-*-hpux*) compare_exclusions="gcc/cc*-checksum\$(objext) | */libgcc/lib2funcs* | gcc/ada/*tools/* | gcc/function-tests.o" ;;
3548   powerpc*-ibm-aix*) compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/* | *libgomp*\$(objext)" ;;
3549 esac
3550 AC_SUBST(compare_exclusions)
3551
3552 AC_CONFIG_FILES([Makefile],
3553   [sed "$extrasub_build" Makefile |
3554    sed "$extrasub_host" |
3555    sed "$extrasub_target" > mf$$
3556    mv -f mf$$ Makefile],
3557   [extrasub_build="$extrasub_build"
3558    extrasub_host="$extrasub_host"
3559    extrasub_target="$extrasub_target"])
3560 AC_OUTPUT