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-libatomic \
 156                 target-libitm \
 157                 target-libstdc++-v3 \
 158                 target-libsanitizer \
 159                 target-libvtv \
 160                 target-libmpx \
 161                 target-libssp \
 162                 target-libquadmath \
 163                 target-libgfortran \
 164                 target-boehm-gc \
 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
 638
 639 # Disable libquadmath for some systems.
 640 case "${target}" in
 641   avr-*-*)
 642     noconfigdirs="$noconfigdirs target-libquadmath"
 643     ;;
 644   # libquadmath is unused on AIX and libquadmath build process use of
 645   # LD_LIBRARY_PATH can break AIX bootstrap.
 646   powerpc-*-aix* | rs6000-*-aix*)
 647     noconfigdirs="$noconfigdirs target-libquadmath"
 648     ;;
 649 esac
 650
 651 # Disable libssp for some systems.
 652 case "${target}" in
 653   avr-*-*)
 654     # No hosted I/O support.
 655     noconfigdirs="$noconfigdirs target-libssp"
 656     ;;
 657   powerpc-*-aix* | rs6000-*-aix*)
 658     noconfigdirs="$noconfigdirs target-libssp"
 659     ;;
 660   rl78-*-*)
 661     # libssp uses a misaligned load to trigger a fault, but the RL78
 662     # doesn't fault for those - instead, it gives a build-time error
 663     # for explicit misaligned loads.
 664     noconfigdirs="$noconfigdirs target-libssp"
 665     ;;
 666   visium-*-*)
 667     # No hosted I/O support.
 668     noconfigdirs="$noconfigdirs target-libssp"
 669     ;;
 670 esac
 671
 672 # Disable libstdc++-v3 for some systems.
 673 # Allow user to override this if they pass --enable-libstdc++-v3
 674 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 675   case "${target}" in
 676     *-*-vxworks*)
 677       # VxWorks uses the Dinkumware C++ library.
 678       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 679       ;;
 680     arm*-wince-pe*)
 681       # the C++ libraries don't build on top of CE's C libraries
 682       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 683       ;;
 684     avr-*-*)
 685       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 686       ;;
 687     ft32-*-*)
 688       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 689       ;;
 690   esac
 691 fi
 692
 693 # Disable Fortran for some systems.
 694 case "${target}" in
 695   mmix-*-*)
 696     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 697     unsupported_languages="$unsupported_languages fortran"
 698     ;;
 699 esac
 700
 701 # Disable libffi for some systems.
 702 case "${target}" in
 703   powerpc-*-darwin*)
 704     ;;
 705   i[[3456789]]86-*-darwin*)
 706     ;;
 707   x86_64-*-darwin[[912]]*)
 708     ;;
 709   *-*-darwin*)
 710     noconfigdirs="$noconfigdirs target-libffi"
 711     ;;
 712   *-*-netware*)
 713     noconfigdirs="$noconfigdirs target-libffi"
 714     ;;
 715   *-*-phoenix*)
 716     noconfigdirs="$noconfigdirs target-libffi"
 717     ;;
 718   *-*-rtems*)
 719     noconfigdirs="$noconfigdirs target-libffi"
 720     ;;
 721   *-*-tpf*)
 722     noconfigdirs="$noconfigdirs target-libffi"
 723     ;;
 724   *-*-uclinux*)
 725     noconfigdirs="$noconfigdirs target-libffi"
 726     ;;
 727   *-*-vxworks*)
 728     noconfigdirs="$noconfigdirs target-libffi"
 729     ;;
 730   aarch64*-*-freebsd*)
 731     noconfigdirs="$noconfigdirs target-libffi"
 732     ;;
 733   alpha*-*-*vms*)
 734     noconfigdirs="$noconfigdirs target-libffi"
 735     ;;
 736   arm*-*-freebsd*)
 737     noconfigdirs="$noconfigdirs target-libffi"
 738     ;;
 739   arm-wince-pe)
 740     noconfigdirs="$noconfigdirs target-libffi"
 741     ;;
 742   arm*-*-symbianelf*)
 743     noconfigdirs="$noconfigdirs target-libffi"
 744     ;;
 745   cris-*-* | crisv32-*-*)
 746     case "${target}" in
 747       *-*-linux*)
 748         ;;
 749       *) # See PR46792 regarding target-libffi.
 750         noconfigdirs="$noconfigdirs target-libffi";;
 751     esac
 752     ;;
 753   hppa*64*-*-hpux*)
 754     noconfigdirs="$noconfigdirs target-libffi"
 755     ;;
 756   hppa*-hp-hpux11*)
 757     ;;
 758   hppa*-*-hpux*)
 759     noconfigdirs="$noconfigdirs target-libffi"
 760     ;;
 761   ia64*-*-*vms*)
 762     noconfigdirs="$noconfigdirs target-libffi"
 763     ;;
 764   i[[3456789]]86-w64-mingw*)
 765     noconfigdirs="$noconfigdirs target-libffi"
 766     ;;
 767   i[[3456789]]86-*-mingw*)
 768     noconfigdirs="$noconfigdirs target-libffi"
 769     ;;
 770   x86_64-*-mingw*)
 771     noconfigdirs="$noconfigdirs target-libffi"
 772     ;;
 773   mmix-*-*)
 774     noconfigdirs="$noconfigdirs target-libffi"
 775     ;;
 776   powerpc-*-aix*)
 777     # copied from rs6000-*-* entry
 778     noconfigdirs="$noconfigdirs target-libffi"
 779     ;;
 780   rs6000-*-aix*)
 781     noconfigdirs="$noconfigdirs target-libffi"
 782     ;;
 783   ft32-*-*)
 784     noconfigdirs="$noconfigdirs target-libffi"
 785     ;;
 786   *-*-lynxos*)
 787     noconfigdirs="$noconfigdirs target-libffi"
 788     ;;
 789 esac
 790
 791 # Disable the go frontend on systems where it is known to not work. Please keep
 792 # this in sync with contrib/config-list.mk.
 793 case "${target}" in
 794 *-*-darwin* | *-*-cygwin* | *-*-mingw* | *-*-aix*)
 795     unsupported_languages="$unsupported_languages go"
 796     ;;
 797 esac
 798
 799 # Disable libgo for some systems where it is known to not work.
 800 # For testing, you can easily override this with --enable-libgo.
 801 if test x$enable_libgo = x; then
 802     case "${target}" in
 803     *-*-darwin*)
 804         # PR 46986
 805         noconfigdirs="$noconfigdirs target-libgo"
 806         ;;
 807     *-*-cygwin* | *-*-mingw*)
 808         noconfigdirs="$noconfigdirs target-libgo"
 809         ;;
 810     *-*-aix*)
 811         noconfigdirs="$noconfigdirs target-libgo"
 812         ;;
 813     esac
 814 fi
 815
 816 # Default libgloss CPU subdirectory.
 817 libgloss_dir="$target_cpu"
 818
 819 case "${target}" in
 820   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 821     libgloss_dir=wince
 822     ;;
 823   aarch64*-*-* )
 824     libgloss_dir=aarch64
 825     ;;
 826   arm*-*-*)
 827     libgloss_dir=arm
 828     ;;
 829   cris-*-* | crisv32-*-*)
 830     libgloss_dir=cris
 831     ;;
 832   hppa*-*-*)
 833     libgloss_dir=pa
 834     ;;
 835   i[[3456789]]86-*-*)
 836     libgloss_dir=i386
 837     ;;
 838   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 839     libgloss_dir=m68hc11
 840     ;;
 841   m68*-*-* | fido-*-*)
 842     libgloss_dir=m68k
 843     ;;
 844   mips*-*-*)
 845     libgloss_dir=mips
 846     ;;
 847   powerpc*-*-*)
 848     libgloss_dir=rs6000
 849     ;;
 850   sparc*-*-*)
 851     libgloss_dir=sparc
 852     ;;
 853 esac
 854
 855 # Disable newlib and libgloss for various target OSes.
 856 case "${target}" in
 857   alpha*-dec-osf*)
 858     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 859     ;;
 860   i[[3456789]]86-*-linux*)
 861     # This section makes it possible to build newlib natively on linux.
 862     # If we are using a cross compiler then don't configure newlib.
 863     if test x${is_cross_compiler} != xno ; then
 864       noconfigdirs="$noconfigdirs target-newlib"
 865     fi
 866     noconfigdirs="$noconfigdirs target-libgloss"
 867     # If we are not using a cross compiler, do configure newlib.
 868     # Note however, that newlib will only be configured in this situation
 869     # if the --with-newlib option has been given, because otherwise
 870     # 'target-newlib' will appear in skipdirs.
 871     ;;
 872   i[[3456789]]86-*-rdos*)
 873     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 874     ;;
 875   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 876     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 877     ;;
 878   sparc-*-sunos4*)
 879     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 880     ;;
 881   *-*-aix*)
 882     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 883     ;;
 884   *-*-beos*)
 885     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 886     ;;
 887   *-*-chorusos)
 888     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 889     ;;
 890   *-*-dragonfly*)
 891     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 892     ;;
 893   *-*-freebsd*)
 894     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 895     ;;
 896   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 897     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 898     ;;
 899   *-*-lynxos*)
 900     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 901     ;;
 902   *-*-mingw*)
 903     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 904     ;;
 905   *-*-netbsd*)
 906     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 907     ;;
 908   *-*-netware*)
 909     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 910     ;;
 911   *-*-tpf*)
 912     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 913     ;;
 914   *-*-uclinux*)
 915     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 916     ;;
 917   *-*-vxworks*)
 918     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 919     ;;
 920 esac
 921
 922 case "${target}" in
 923   *-*-chorusos)
 924     ;;
 925   aarch64-*-darwin*)
 926     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 927     noconfigdirs="$noconfigdirs sim target-rda"
 928     ;;
 929   arm-*-darwin*)
 930     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 931     noconfigdirs="$noconfigdirs sim target-rda"
 932     ;;
 933   powerpc-*-darwin*)
 934     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 935     noconfigdirs="$noconfigdirs sim target-rda"
 936     ;;
 937   i[[3456789]]86-*-darwin*)
 938     noconfigdirs="$noconfigdirs ld gprof"
 939     noconfigdirs="$noconfigdirs sim target-rda"
 940     ;;
 941   x86_64-*-darwin[[912]]*)
 942     noconfigdirs="$noconfigdirs ld gas gprof"
 943     noconfigdirs="$noconfigdirs sim target-rda"
 944     ;;
 945   *-*-darwin*)
 946     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 947     noconfigdirs="$noconfigdirs sim target-rda"
 948     ;;
 949   *-*-dragonfly*)
 950     ;;
 951   *-*-freebsd*)
 952     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
 953         && test -f /usr/local/include/gmp.h; then
 954       with_gmp=/usr/local
 955     fi
 956     ;;
 957   *-*-kaos*)
 958     # Remove unsupported stuff on all kaOS configurations.
 959     noconfigdirs="$noconfigdirs target-libgloss"
 960     ;;
 961   *-*-netbsd*)
 962     ;;
 963   *-*-netware*)
 964     ;;
 965   *-*-phoenix*)
 966     noconfigdirs="$noconfigdirs target-libgloss"
 967     ;;
 968   *-*-rtems*)
 969     noconfigdirs="$noconfigdirs target-libgloss"
 970     # this is not caught below because this stanza matches earlier
 971     case $target in
 972       or1k*-*-*) noconfigdirs="$noconfigdirs gdb" ;;
 973     esac
 974     ;;
 975     # The tpf target doesn't support gdb yet.
 976   *-*-tpf*)
 977     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
 978     ;;
 979   *-*-uclinux*)
 980     noconfigdirs="$noconfigdirs target-rda"
 981     ;;
 982   *-*-vxworks*)
 983     ;;
 984   alpha*-dec-osf*)
 985     # ld works, but does not support shared libraries.
 986     # gas doesn't generate exception information.
 987     noconfigdirs="$noconfigdirs gas ld"
 988     ;;
 989   alpha*-*-*vms*)
 990     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
 991     ;;
 992   alpha*-*-*)
 993     # newlib is not 64 bit ready
 994     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 995     ;;
 996   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 997     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
 998     ;;
 999   arc*-*-*)
1000     noconfigdirs="$noconfigdirs sim"
1001     ;;
1002   arm-*-pe*)
1003     noconfigdirs="$noconfigdirs target-libgloss"
1004     ;;
1005   arm-*-riscix*)
1006     noconfigdirs="$noconfigdirs ld target-libgloss"
1007     ;;
1008   avr-*-*)
1009     if test x${with_avrlibc} != xno; then
1010       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1011     fi
1012     ;;
1013   c4x-*-* | tic4x-*-*)
1014     noconfigdirs="$noconfigdirs target-libgloss"
1015     ;;
1016   tic54x-*-*)
1017     noconfigdirs="$noconfigdirs target-libgloss gdb"
1018     ;;
1019   d10v-*-*)
1020     noconfigdirs="$noconfigdirs target-libgloss"
1021     ;;
1022   d30v-*-*)
1023     noconfigdirs="$noconfigdirs gdb"
1024     ;;
1025   fr30-*-elf*)
1026     noconfigdirs="$noconfigdirs gdb"
1027     ;;
1028   ft32-*-*)
1029     noconfigdirs="$noconfigdirs target-rda gprof"
1030     ;;
1031   moxie-*-*)
1032     noconfigdirs="$noconfigdirs"
1033     ;;
1034   h8300*-*-*)
1035     noconfigdirs="$noconfigdirs target-libgloss"
1036     ;;
1037   h8500-*-*)
1038     noconfigdirs="$noconfigdirs target-libgloss"
1039     ;;
1040   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1041     ;;
1042   hppa*64*-*-hpux*)
1043     noconfigdirs="$noconfigdirs gdb"
1044     ;;
1045   hppa*-*-hpux11*)
1046     noconfigdirs="$noconfigdirs gdb ld"
1047     ;;
1048   hppa*64*-*-linux*)
1049     ;;
1050   hppa*-*-linux*)
1051     ;;
1052   hppa*-*-*elf* | \
1053   hppa*-*-lites* | \
1054   hppa*-*-openbsd* | \
1055   hppa*64*-*-*)
1056     ;;
1057   hppa*-*-pro*)
1058     ;;
1059   hppa*-*-*)
1060     noconfigdirs="$noconfigdirs ld"
1061     ;;
1062   i960-*-*)
1063     noconfigdirs="$noconfigdirs gdb"
1064     ;;
1065   ia64*-*-elf*)
1066     # No gdb support yet.
1067     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1068     ;;
1069   ia64*-**-hpux*)
1070     # No ld support yet.
1071     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1072     ;;
1073   ia64*-*-*vms*)
1074     # No ld support yet.
1075     noconfigdirs="$noconfigdirs libgui itcl ld"
1076     ;;
1077   i[[3456789]]86-w64-mingw*)
1078     ;;
1079   i[[3456789]]86-*-mingw*)
1080     target_configdirs="$target_configdirs target-winsup"
1081     ;;
1082   *-*-cygwin*)
1083     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1084     noconfigdirs="$noconfigdirs target-libgloss"
1085     # always build newlib if winsup directory is present.
1086     if test -d "$srcdir/winsup/cygwin"; then
1087       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1088     elif test -d "$srcdir/newlib"; then
1089       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1090     fi
1091     ;;
1092   i[[3456789]]86-*-pe)
1093     noconfigdirs="$noconfigdirs target-libgloss"
1094     ;;
1095   i[[3456789]]86-*-sco3.2v5*)
1096     # The linker does not yet know about weak symbols in COFF,
1097     # and is not configured to handle mixed ELF and COFF.
1098     noconfigdirs="$noconfigdirs ld target-libgloss"
1099     ;;
1100   i[[3456789]]86-*-sco*)
1101     noconfigdirs="$noconfigdirs gprof target-libgloss"
1102     ;;
1103   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1104     noconfigdirs="$noconfigdirs target-libgloss"
1105     ;;
1106   i[[3456789]]86-*-sysv4*)
1107     noconfigdirs="$noconfigdirs target-libgloss"
1108     ;;
1109   i[[3456789]]86-*-beos*)
1110     noconfigdirs="$noconfigdirs gdb"
1111     ;;
1112   i[[3456789]]86-*-rdos*)
1113     noconfigdirs="$noconfigdirs gdb"
1114     ;;
1115   mmix-*-*)
1116     noconfigdirs="$noconfigdirs gdb"
1117     ;;
1118   mt-*-*)
1119     noconfigdirs="$noconfigdirs sim"
1120     ;;
1121   powerpc-*-aix*)
1122     # copied from rs6000-*-* entry
1123     noconfigdirs="$noconfigdirs gprof"
1124     ;;
1125   powerpc*-*-winnt* | powerpc*-*-pe*)
1126     target_configdirs="$target_configdirs target-winsup"
1127     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1128     # always build newlib.
1129     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1130     ;;
1131     # This is temporary until we can link against shared libraries
1132   powerpcle-*-solaris*)
1133     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1134     ;;
1135   powerpc-*-beos*)
1136     noconfigdirs="$noconfigdirs gdb"
1137     ;;
1138   rs6000-*-lynxos*)
1139     noconfigdirs="$noconfigdirs gprof"
1140     ;;
1141   rs6000-*-aix*)
1142     noconfigdirs="$noconfigdirs gprof"
1143     ;;
1144   rs6000-*-*)
1145     noconfigdirs="$noconfigdirs gprof"
1146     ;;
1147   m68k-apollo-*)
1148     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1149     ;;
1150   microblaze*)
1151     noconfigdirs="$noconfigdirs gprof"
1152     ;;
1153   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1154     if test x$with_newlib = xyes; then
1155       noconfigdirs="$noconfigdirs gprof"
1156     fi
1157     ;;
1158   mips*-*-irix5*)
1159     noconfigdirs="$noconfigdirs gprof target-libgloss"
1160     ;;
1161   mips*-*-irix6*)
1162     noconfigdirs="$noconfigdirs gprof target-libgloss"
1163     ;;
1164   mips*-*-bsd*)
1165     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1166     ;;
1167   mips*-*-linux*)
1168     ;;
1169   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1170   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1171     noconfigdirs="$noconfigdirs ld gas gprof"
1172     ;;
1173   mips*-*-*)
1174     noconfigdirs="$noconfigdirs gprof"
1175     ;;
1176   nvptx*-*-*)
1177     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1178     ;;
1179   or1k*-*-*)
1180     noconfigdirs="$noconfigdirs gdb"
1181     ;;
1182   sh-*-*)
1183     case "${target}" in
1184       sh*-*-elf)
1185          ;;
1186       *)
1187          noconfigdirs="$noconfigdirs target-libgloss" ;;
1188     esac
1189     ;;
1190   sparc-*-sunos4*)
1191     if test x${is_cross_compiler} = xno ; then
1192            use_gnu_ld=no
1193     fi
1194     ;;
1195   tic6x-*-*)
1196     noconfigdirs="$noconfigdirs sim"
1197     ;;
1198   tilepro*-*-* | tilegx*-*-*)
1199     noconfigdirs="$noconfigdirs sim"
1200     ;;
1201   v810-*-*)
1202     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1203     ;;
1204   vax-*-*)
1205     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1206     ;;
1207 esac
1208
1209 # If we aren't building newlib, then don't build libgloss, since libgloss
1210 # depends upon some newlib header files.
1211 case "${noconfigdirs}" in
1212   *target-libgloss*) ;;
1213   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1214 esac
1215
1216 # Work in distributions that contain no compiler tools, like Autoconf.
1217 host_makefile_frag=/dev/null
1218 if test -d ${srcdir}/config ; then
1219 case "${host}" in
1220   i[[3456789]]86-*-msdosdjgpp*)
1221     host_makefile_frag="config/mh-djgpp"
1222     ;;
1223   *-cygwin*)
1224     ACX_CHECK_CYGWIN_CAT_WORKS
1225     host_makefile_frag="config/mh-cygwin"
1226     ;;
1227   *-mingw*)
1228     host_makefile_frag="config/mh-mingw"
1229     ;;
1230   alpha*-linux*)
1231     host_makefile_frag="config/mh-alpha-linux"
1232     ;;
1233   hppa*-hp-hpux10*)
1234     host_makefile_frag="config/mh-pa-hpux10"
1235     ;;
1236   hppa*-hp-hpux*)
1237     host_makefile_frag="config/mh-pa"
1238     ;;
1239   hppa*-*)
1240     host_makefile_frag="config/mh-pa"
1241     ;;
1242   *-*-darwin*)
1243     host_makefile_frag="config/mh-darwin"
1244     ;;
1245   powerpc-*-aix*)
1246     host_makefile_frag="config/mh-ppc-aix"
1247     ;;
1248   rs6000-*-aix*)
1249     host_makefile_frag="config/mh-ppc-aix"
1250     ;;
1251 esac
1252 fi
1253
1254 if test "${build}" != "${host}" ; then
1255   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1256   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1257   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1258   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1259   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1260   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1261   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1262   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1263   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1264   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1265   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1266   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1267 else
1268   AR_FOR_BUILD="\$(AR)"
1269   AS_FOR_BUILD="\$(AS)"
1270   CC_FOR_BUILD="\$(CC)"
1271   CXX_FOR_BUILD="\$(CXX)"
1272   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1273   GOC_FOR_BUILD="\$(GOC)"
1274   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1275   LD_FOR_BUILD="\$(LD)"
1276   NM_FOR_BUILD="\$(NM)"
1277   RANLIB_FOR_BUILD="\$(RANLIB)"
1278   WINDRES_FOR_BUILD="\$(WINDRES)"
1279   WINDMC_FOR_BUILD="\$(WINDMC)"
1280 fi
1281
1282 AC_PROG_CC
1283 AC_PROG_CXX
1284
1285 # We must set the default linker to the linker used by gcc for the correct
1286 # operation of libtool.  If LD is not defined and we are using gcc, try to
1287 # set the LD default to the ld used by gcc.
1288 if test -z "$LD"; then
1289   if test "$GCC" = yes; then
1290     case $build in
1291     *-*-mingw*)
1292       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1293     *)
1294       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1295     esac
1296     case $gcc_prog_ld in
1297     # Accept absolute paths.
1298     [[\\/]* | [A-Za-z]:[\\/]*)]
1299       LD="$gcc_prog_ld" ;;
1300     esac
1301   fi
1302 fi
1303
1304 # Check whether -static-libstdc++ -static-libgcc is supported.
1305 have_static_libs=no
1306 if test "$GCC" = yes; then
1307   saved_LDFLAGS="$LDFLAGS"
1308
1309   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1310   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1311   AC_LANG_PUSH(C++)
1312   AC_LINK_IFELSE([
1313 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1314 #error -static-libstdc++ not implemented
1315 #endif
1316 int main() {}],
1317     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1318     [AC_MSG_RESULT([no])])
1319   AC_LANG_POP(C++)
1320
1321   LDFLAGS="$saved_LDFLAGS"
1322 fi
1323
1324 ACX_PROG_GNAT
1325 ACX_PROG_CMP_IGNORE_INITIAL
1326
1327 AC_ARG_ENABLE([bootstrap],
1328 [AS_HELP_STRING([--enable-bootstrap],
1329                 [enable bootstrapping @<:@yes if native build@:>@])],,
1330 enable_bootstrap=default)
1331
1332 # Issue errors and warnings for invalid/strange bootstrap combinations.
1333 if test -r $srcdir/gcc/configure; then
1334   have_compiler=yes
1335 else
1336   have_compiler=no
1337 fi
1338
1339 case "$have_compiler:$host:$target:$enable_bootstrap" in
1340   *:*:*:no) ;;
1341
1342   # Default behavior.  Enable bootstrap if we have a compiler
1343   # and we are in a native configuration.
1344   yes:$build:$build:default)
1345     enable_bootstrap=yes ;;
1346
1347   *:*:*:default)
1348     enable_bootstrap=no ;;
1349
1350   # We have a compiler and we are in a native configuration, bootstrap is ok
1351   yes:$build:$build:yes)
1352     ;;
1353
1354   # Other configurations, but we have a compiler.  Assume the user knows
1355   # what he's doing.
1356   yes:*:*:yes)
1357     AC_MSG_WARN([trying to bootstrap a cross compiler])
1358     ;;
1359
1360   # No compiler: if they passed --enable-bootstrap explicitly, fail
1361   no:*:*:yes)
1362     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1363
1364   # Fail if wrong command line
1365   *)
1366     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1367     ;;
1368 esac
1369
1370 # When bootstrapping with GCC, build stage 1 in C++98 mode to ensure that a
1371 # C++98 compiler can still start the bootstrap.
1372 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1373   CXX="$CXX -std=gnu++98"
1374 fi
1375
1376 # Used for setting $lt_cv_objdir
1377 _LT_CHECK_OBJDIR
1378
1379 # Check for GMP, MPFR and MPC
1380 gmplibs="-lmpc -lmpfr -lgmp"
1381 gmpinc=
1382 have_gmp=no
1383
1384 # Specify a location for mpc
1385 # check for this first so it ends up on the link line before mpfr.
1386 AC_ARG_WITH(mpc,
1387 [AS_HELP_STRING([--with-mpc=PATH],
1388                 [specify prefix directory for installed MPC package.
1389                  Equivalent to --with-mpc-include=PATH/include
1390                  plus --with-mpc-lib=PATH/lib])])
1391 AC_ARG_WITH(mpc-include,
1392 [AS_HELP_STRING([--with-mpc-include=PATH],
1393                 [specify directory for installed MPC include files])])
1394 AC_ARG_WITH(mpc-lib,
1395 [AS_HELP_STRING([--with-mpc-lib=PATH],
1396                 [specify directory for the installed MPC library])])
1397
1398 if test "x$with_mpc" != x; then
1399   gmplibs="-L$with_mpc/lib $gmplibs"
1400   gmpinc="-I$with_mpc/include $gmpinc"
1401 fi
1402 if test "x$with_mpc_include" != x; then
1403   gmpinc="-I$with_mpc_include $gmpinc"
1404 fi
1405 if test "x$with_mpc_lib" != x; then
1406   gmplibs="-L$with_mpc_lib $gmplibs"
1407 fi
1408 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1409   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1410   gmpinc='-I$$s/mpc/src '"$gmpinc"
1411   # Do not test the mpc version.  Assume that it is sufficient, since
1412   # it is in the source tree, and the library has not been built yet
1413   # but it would be included on the link line in the version check below
1414   # hence making the test fail.
1415   have_gmp=yes
1416 fi
1417
1418 # Specify a location for mpfr
1419 # check for this first so it ends up on the link line before gmp.
1420 AC_ARG_WITH(mpfr-dir,
1421 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1422 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1423 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1424
1425 AC_ARG_WITH(mpfr,
1426 [AS_HELP_STRING([--with-mpfr=PATH],
1427                 [specify prefix directory for installed MPFR package.
1428                  Equivalent to --with-mpfr-include=PATH/include
1429                  plus --with-mpfr-lib=PATH/lib])])
1430 AC_ARG_WITH(mpfr-include,
1431 [AS_HELP_STRING([--with-mpfr-include=PATH],
1432                 [specify directory for installed MPFR include files])])
1433 AC_ARG_WITH(mpfr-lib,
1434 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1435                 [specify directory for the installed MPFR library])])
1436
1437 if test "x$with_mpfr" != x; then
1438   gmplibs="-L$with_mpfr/lib $gmplibs"
1439   gmpinc="-I$with_mpfr/include $gmpinc"
1440 fi
1441 if test "x$with_mpfr_include" != x; then
1442   gmpinc="-I$with_mpfr_include $gmpinc"
1443 fi
1444 if test "x$with_mpfr_lib" != x; then
1445   gmplibs="-L$with_mpfr_lib $gmplibs"
1446 fi
1447 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1448   # MPFR v3.1.0 moved the sources into a src sub-directory.
1449   if ! test -d ${srcdir}/mpfr/src; then
1450     AC_MSG_ERROR([dnl
1451 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1452   fi
1453   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1454   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1455   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1456   # Do not test the mpfr version.  Assume that it is sufficient, since
1457   # it is in the source tree, and the library has not been built yet
1458   # but it would be included on the link line in the version check below
1459   # hence making the test fail.
1460   have_gmp=yes
1461 fi
1462
1463 # Specify a location for gmp
1464 AC_ARG_WITH(gmp-dir,
1465 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1466 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1467 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1468
1469 AC_ARG_WITH(gmp,
1470 [AS_HELP_STRING([--with-gmp=PATH],
1471                 [specify prefix directory for the installed GMP package.
1472                  Equivalent to --with-gmp-include=PATH/include
1473                  plus --with-gmp-lib=PATH/lib])])
1474 AC_ARG_WITH(gmp-include,
1475 [AS_HELP_STRING([--with-gmp-include=PATH],
1476                 [specify directory for installed GMP include files])])
1477 AC_ARG_WITH(gmp-lib,
1478 [AS_HELP_STRING([--with-gmp-lib=PATH],
1479                 [specify directory for the installed GMP library])])
1480
1481
1482 if test "x$with_gmp" != x; then
1483   gmplibs="-L$with_gmp/lib $gmplibs"
1484   gmpinc="-I$with_gmp/include $gmpinc"
1485 fi
1486 if test "x$with_gmp_include" != x; then
1487   gmpinc="-I$with_gmp_include $gmpinc"
1488 fi
1489 if test "x$with_gmp_lib" != x; then
1490   gmplibs="-L$with_gmp_lib $gmplibs"
1491 fi
1492 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1493   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1494   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1495   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1496   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1497   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1498   # Do not test the gmp version.  Assume that it is sufficient, since
1499   # it is in the source tree, and the library has not been built yet
1500   # but it would be included on the link line in the version check below
1501   # hence making the test fail.
1502   have_gmp=yes
1503 fi
1504
1505 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1506   have_gmp=yes
1507   saved_CFLAGS="$CFLAGS"
1508   CFLAGS="$CFLAGS $gmpinc"
1509   # Check for the recommended and required versions of GMP.
1510   AC_MSG_CHECKING([for the correct version of gmp.h])
1511   AC_TRY_COMPILE([#include "gmp.h"],[
1512   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1513   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1514   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1515   choke me
1516   #endif
1517   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1518   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1519   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1520   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1521   choke me
1522   #endif
1523   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1524    [AC_MSG_RESULT([no]); have_gmp=no])
1525
1526   # If we have GMP, check the MPFR version.
1527   if test x"$have_gmp" = xyes; then
1528     # Check for the recommended and required versions of MPFR.
1529     AC_MSG_CHECKING([for the correct version of mpfr.h])
1530     AC_TRY_COMPILE([#include <gmp.h>
1531     #include <mpfr.h>],[
1532     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,0)
1533     choke me
1534     #endif
1535     ], [AC_TRY_COMPILE([#include <gmp.h>
1536     #include <mpfr.h>],[
1537     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,2)
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   fi
1543
1544   # Check for the MPC header version.
1545   if test x"$have_gmp" = xyes ; then
1546     # Check for the recommended and required versions of MPC.
1547     AC_MSG_CHECKING([for the correct version of mpc.h])
1548     AC_TRY_COMPILE([#include <mpc.h>],[
1549     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1550     choke me
1551     #endif
1552     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1553     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1554     choke me
1555     #endif
1556     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1557      [AC_MSG_RESULT([no]); have_gmp=no])
1558   fi
1559
1560   # Now check the MPFR library.
1561   if test x"$have_gmp" = xyes; then
1562     saved_LIBS="$LIBS"
1563     LIBS="$LIBS $gmplibs"
1564     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1565     AC_TRY_LINK([#include <mpc.h>],[
1566     mpfr_t n;
1567     mpfr_t x;
1568     mpc_t c;
1569     int t;
1570     mpfr_init (n);
1571     mpfr_init (x);
1572     mpfr_atan2 (n, n, x, GMP_RNDN);
1573     mpfr_erfc (n, x, GMP_RNDN);
1574     mpfr_subnormalize (x, t, GMP_RNDN);
1575     mpfr_clear(n);
1576     mpfr_clear(x);
1577     mpc_init2 (c, 53);
1578     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1579     mpc_cosh (c, c, MPC_RNDNN);
1580     mpc_pow (c, c, c, MPC_RNDNN);
1581     mpc_acosh (c, c, MPC_RNDNN);
1582     mpc_clear (c);
1583     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1584     LIBS="$saved_LIBS"
1585   fi
1586
1587   CFLAGS="$saved_CFLAGS"
1588
1589 # The library versions listed in the error message below should match
1590 # the HARD-minimums enforced above.
1591   if test x$have_gmp != xyes; then
1592     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
1593 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1594 their locations.  Source code for these libraries can be found at
1595 their respective hosting sites as well as at
1596 ftp://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1597 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1598 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1599 make sure that you have installed both the libraries and the header
1600 files.  They may be located in separate packages.])
1601   fi
1602 fi
1603
1604 # Flags needed for both GMP, MPFR and/or MPC.
1605 AC_SUBST(gmplibs)
1606 AC_SUBST(gmpinc)
1607 AC_SUBST(extra_mpfr_configure_flags)
1608 AC_SUBST(extra_mpc_gmp_configure_flags)
1609 AC_SUBST(extra_mpc_mpfr_configure_flags)
1610 AC_SUBST(extra_isl_gmp_configure_flags)
1611
1612 # Libraries to use for stage1 or when not bootstrapping.
1613 AC_ARG_WITH(stage1-libs,
1614 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1615 [if test "$withval" = "no" -o "$withval" = "yes"; then
1616    stage1_libs=
1617  else
1618    stage1_libs=$withval
1619  fi],
1620 [stage1_libs=])
1621 AC_SUBST(stage1_libs)
1622
1623 # Linker flags to use for stage1 or when not bootstrapping.
1624 AC_ARG_WITH(stage1-ldflags,
1625 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1626 [if test "$withval" = "no" -o "$withval" = "yes"; then
1627    stage1_ldflags=
1628  else
1629    stage1_ldflags=$withval
1630  fi],
1631 [stage1_ldflags=
1632  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1633  # if supported.  But if the user explicitly specified the libraries to use,
1634  # trust that they are doing what they want.
1635  if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
1636    stage1_ldflags="-static-libstdc++ -static-libgcc"
1637  fi])
1638 AC_SUBST(stage1_ldflags)
1639
1640 # Libraries to use for stage2 and later builds.
1641 AC_ARG_WITH(boot-libs,
1642 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1643 [if test "$withval" = "no" -o "$withval" = "yes"; then
1644    poststage1_libs=
1645  else
1646    poststage1_libs=$withval
1647  fi],
1648 [poststage1_libs=])
1649 AC_SUBST(poststage1_libs)
1650
1651 # Linker flags to use for stage2 and later builds.
1652 AC_ARG_WITH(boot-ldflags,
1653 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1654                 [linker flags for stage2 and later])],
1655 [if test "$withval" = "no" -o "$withval" = "yes"; then
1656    poststage1_ldflags=
1657  else
1658    poststage1_ldflags=$withval
1659  fi],
1660 [poststage1_ldflags=
1661  # In stages 2 and 3, default to linking libstdc++ and libgcc
1662  # statically.  But if the user explicitly specified the libraries to
1663  # use, trust that they are doing what they want.
1664  if test "$poststage1_libs" = ""; then
1665    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1666  fi])
1667 AC_SUBST(poststage1_ldflags)
1668
1669 # GCC GRAPHITE dependency isl.
1670 # Basic setup is inlined here, actual checks are in config/isl.m4
1671
1672 AC_ARG_WITH(isl,
1673   [AS_HELP_STRING(
1674    [--with-isl=PATH],
1675    [Specify prefix directory for the installed isl package.
1676     Equivalent to --with-isl-include=PATH/include
1677     plus --with-isl-lib=PATH/lib])])
1678
1679 # Treat --without-isl as a request to disable
1680 # GRAPHITE support and skip all following checks.
1681 if test "x$with_isl" != "xno"; then
1682   # Check for isl
1683   dnl Provide configure switches and initialize islinc & isllibs
1684   dnl with user input.
1685   ISL_INIT_FLAGS
1686   dnl The versions of isl that work for Graphite
1687   ISL_CHECK_VERSION()
1688   dnl Only execute fail-action, if isl has been requested.
1689   ISL_IF_FAILED([
1690     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1691 fi
1692
1693 # If the isl check failed, disable builds of in-tree variant of isl
1694 if test "x$with_isl" = xno ||
1695    test "x$gcc_cv_isl" = xno; then
1696   noconfigdirs="$noconfigdirs isl"
1697   islinc=
1698 fi
1699
1700 AC_SUBST(isllibs)
1701 AC_SUBST(islinc)
1702
1703 # Check for LTO support.
1704 AC_ARG_ENABLE(lto,
1705 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1706 enable_lto=$enableval,
1707 enable_lto=yes; default_enable_lto=yes)
1708
1709 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1710   build_lto_plugin=yes
1711 ],[if test x"$default_enable_lto" = x"yes" ; then
1712     case $target in
1713       *-apple-darwin9* | *-cygwin* | *-mingw* | *djgpp*) ;;
1714       # On other non-ELF platforms, LTO has yet to be validated.
1715       *) enable_lto=no ;;
1716     esac
1717   else
1718   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1719   # It would also be nice to check the binutils support, but we don't
1720   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1721   # warn during gcc/ subconfigure; unless you're bootstrapping with
1722   # -flto it won't be needed until after installation anyway.
1723     case $target in
1724       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1725       *) if test x"$enable_lto" = x"yes"; then
1726         AC_MSG_ERROR([LTO support is not enabled for this target.])
1727         fi
1728       ;;
1729     esac
1730   fi
1731   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1732   # Build it unless LTO was explicitly disabled.
1733   case $target in
1734     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1735     *) ;;
1736   esac
1737 ])
1738
1739 AC_ARG_ENABLE(linker-plugin-configure-flags,
1740   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1741     [additional flags for configuring linker plugins @<:@none@:>@])],
1742   extra_linker_plugin_configure_flags=$enableval,
1743   extra_linker_plugin_configure_flags=)
1744 AC_SUBST(extra_linker_plugin_configure_flags)
1745 AC_ARG_ENABLE(linker-plugin-flags,
1746   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1747     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1748   extra_linker_plugin_flags=$enableval,
1749   extra_linker_plugin_flags=)
1750 AC_SUBST(extra_linker_plugin_flags)
1751
1752
1753 # By default, C and C++ are the only stage 1 languages.
1754 stage1_languages=,c,
1755
1756 # Target libraries that we bootstrap.
1757 bootstrap_target_libs=,target-libgcc,
1758
1759 # Figure out what language subdirectories are present.
1760 # Look if the user specified --enable-languages="..."; if not, use
1761 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1762 # go away some day.
1763 # NB:  embedded tabs in this IF block -- do not untabify
1764 if test -d ${srcdir}/gcc; then
1765   if test x"${enable_languages+set}" != xset; then
1766     if test x"${LANGUAGES+set}" = xset; then
1767       enable_languages="${LANGUAGES}"
1768         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1769     else
1770       enable_languages=all
1771     fi
1772   else
1773     if test x"${enable_languages}" = x ||
1774        test x"${enable_languages}" = xyes;
1775        then
1776       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1777       exit 1
1778     fi
1779   fi
1780   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1781
1782   # 'f95' is the old name for the 'fortran' language. We issue a warning
1783   # and make the substitution.
1784   case ,${enable_languages}, in
1785     *,f95,*)
1786       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1787       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1788       ;;
1789   esac
1790
1791   # If bootstrapping, C++ must be enabled.
1792   case ",$enable_languages,:$enable_bootstrap" in
1793     *,c++,*:*) ;;
1794     *:yes)
1795       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1796         enable_languages="${enable_languages},c++"
1797       else
1798         AC_MSG_ERROR([bootstrapping requires c++ sources])
1799       fi
1800       ;;
1801   esac
1802
1803   # First scan to see if an enabled language requires some other language.
1804   # We assume that a given config-lang.in will list all the language
1805   # front ends it requires, even if some are required indirectly.
1806   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1807     case ${lang_frag} in
1808       ..) ;;
1809       # The odd quoting in the next line works around
1810       # an apparent bug in bash 1.12 on linux.
1811       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1812       *)
1813         # From the config-lang.in, get $language, $lang_requires, and
1814         # $lang_requires_boot_languages.
1815         language=
1816         lang_requires=
1817         lang_requires_boot_languages=
1818         . ${lang_frag}
1819         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1820           case ,${enable_languages}, in
1821             *,$other,*) ;;
1822             *,all,*) ;;
1823             *,$language,*)
1824               echo " \`$other' language required by \`$language'; enabling" 1>&2
1825               enable_languages="${enable_languages},${other}"
1826               ;;
1827           esac
1828         done
1829         for other in ${lang_requires_boot_languages} ; do
1830           if test "$other" != "c"; then
1831             case ,${enable_stage1_languages}, in
1832               *,$other,*) ;;
1833               *,all,*) ;;
1834               *)
1835                 case ,${enable_languages}, in
1836                   *,$language,*)
1837                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1838                     enable_stage1_languages="$enable_stage1_languages,${other}"
1839                     ;;
1840                 esac
1841                 ;;
1842             esac
1843           fi
1844         done
1845         ;;
1846     esac
1847   done
1848
1849   new_enable_languages=,c,
1850
1851   # If LTO is enabled, add the LTO front end.
1852   if test "$enable_lto" = "yes" ; then
1853     case ,${enable_languages}, in
1854       *,lto,*) ;;
1855       *) enable_languages="${enable_languages},lto" ;;
1856     esac
1857     if test "${build_lto_plugin}" = "yes" ; then
1858       configdirs="$configdirs lto-plugin"
1859     fi
1860   fi
1861
1862   # If we're building an offloading compiler, add the LTO front end.
1863   if test x"$enable_as_accelerator_for" != x ; then
1864     case ,${enable_languages}, in
1865       *,lto,*) ;;
1866       *) enable_languages="${enable_languages},lto" ;;
1867     esac
1868   fi
1869
1870   missing_languages=`echo ",$enable_languages," | sed -e s/,all,/,/ -e s/,c,/,/ `
1871   potential_languages=,c,
1872
1873   enabled_target_libs=
1874   disabled_target_libs=
1875
1876   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1877     case ${lang_frag} in
1878       ..) ;;
1879       # The odd quoting in the next line works around
1880       # an apparent bug in bash 1.12 on linux.
1881       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1882       *)
1883         # From the config-lang.in, get $language, $target_libs,
1884         # $lang_dirs, $boot_language, and $build_by_default
1885         language=
1886         target_libs=
1887         lang_dirs=
1888         subdir_requires=
1889         boot_language=no
1890         build_by_default=yes
1891         . ${lang_frag}
1892         if test x${language} = x; then
1893           echo "${lang_frag} doesn't set \$language." 1>&2
1894           exit 1
1895         fi
1896
1897         if test "$language" = "c++"; then
1898           boot_language=yes
1899         fi
1900
1901         add_this_lang=no
1902         case ,${enable_languages}, in
1903           *,${language},*)
1904             # Language was explicitly selected; include it
1905             # unless it is C, which is enabled by default.
1906             if test "$language" != "c"; then
1907               add_this_lang=yes
1908             fi
1909             ;;
1910           *,all,*)
1911             # 'all' was selected, select it if it is a default language
1912             if test "$language" != "c"; then
1913               add_this_lang=${build_by_default}
1914             fi
1915             ;;
1916         esac
1917
1918         # Disable languages that need other directories if these aren't available.
1919         for i in $subdir_requires; do
1920           test -f "$srcdir/gcc/$i/config-lang.in" && continue
1921           case ,${enable_languages}, in
1922             *,${language},*)
1923               # Specifically requested language; tell them.
1924               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
1925               ;;
1926             *)
1927               # Silently disable.
1928               add_this_lang=unsupported
1929               ;;
1930           esac
1931         done
1932
1933         # Disable Ada if no preexisting GNAT is available.
1934         case ,${enable_languages},:${language}:${have_gnat} in
1935           *,${language},*:ada:no)
1936             # Specifically requested language; tell them.
1937             AC_MSG_ERROR([GNAT is required to build $language])
1938             ;;
1939           *:ada:no)
1940             # Silently disable.
1941             add_this_lang=unsupported
1942             ;;
1943         esac
1944
1945         # Disable a language that is unsupported by the target.
1946         case " $unsupported_languages " in
1947           *" $language "*)
1948             add_this_lang=unsupported
1949             ;;
1950         esac
1951
1952         case $add_this_lang in
1953           unsupported)
1954             # Remove language-dependent dirs.
1955             disabled_target_libs="$disabled_target_libs $target_libs"
1956             noconfigdirs="$noconfigdirs $lang_dirs"
1957             ;;
1958           no)
1959             # Remove language-dependent dirs; still show language as supported.
1960             disabled_target_libs="$disabled_target_libs $target_libs"
1961             noconfigdirs="$noconfigdirs $lang_dirs"
1962             potential_languages="${potential_languages}${language},"
1963             ;;
1964           yes)
1965             new_enable_languages="${new_enable_languages}${language},"
1966             potential_languages="${potential_languages}${language},"
1967             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
1968             enabled_target_libs="$enabled_target_libs $target_libs"
1969             case "${boot_language}:,$enable_stage1_languages," in
1970               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
1971                 # Add to (comma-separated) list of stage 1 languages.
1972                 case ",$stage1_languages," in
1973                   *,$language,* | ,yes, | ,all,) ;;
1974                   *) stage1_languages="${stage1_languages}${language}," ;;
1975                 esac
1976                 # We need to bootstrap any supporting libraries.
1977                 bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
1978                 ;;
1979             esac
1980             ;;
1981         esac
1982         ;;
1983     esac
1984   done
1985
1986   # Add target libraries which are only needed for disabled languages
1987   # to noconfigdirs.
1988   if test -n "$disabled_target_libs"; then
1989     for dir in $disabled_target_libs; do
1990       case " $enabled_target_libs " in
1991       *" ${dir} "*) ;;
1992       *) noconfigdirs="$noconfigdirs $dir" ;;
1993       esac
1994     done
1995   fi
1996
1997   AC_ARG_ENABLE(stage1-languages,
1998   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
1999                   [choose additional languages to build during
2000                   stage1.  Mostly useful for compiler development])],
2001   [case ,${enable_stage1_languages}, in
2002     ,no,|,,)
2003       # Set it to something that will have no effect in the loop below
2004       enable_stage1_languages=c ;;
2005     ,yes,)
2006       enable_stage1_languages=`echo $new_enable_languages | \
2007         sed -e "s/^,//" -e "s/,$//" ` ;;
2008     *,all,*)
2009       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2010         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2011   esac
2012
2013   # Add "good" languages from enable_stage1_languages to stage1_languages,
2014   # while "bad" languages go in missing_languages.  Leave no duplicates.
2015   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2016     case $potential_languages in
2017       *,$i,*)
2018         case $stage1_languages in
2019           *,$i,*) ;;
2020           *) stage1_languages="$stage1_languages$i," ;;
2021         esac ;;
2022       *)
2023         case $missing_languages in
2024           *,$i,*) ;;
2025           *) missing_languages="$missing_languages$i," ;;
2026         esac ;;
2027      esac
2028   done])
2029
2030   # Remove leading/trailing commas that were added for simplicity
2031   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2032   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2033   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2034   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2035
2036   if test "x$missing_languages" != x; then
2037     AC_MSG_ERROR([
2038 The following requested languages could not be built: ${missing_languages}
2039 Supported languages are: ${potential_languages}])
2040   fi
2041   if test "x$new_enable_languages" != "x$enable_languages"; then
2042     echo The following languages will be built: ${new_enable_languages}
2043     enable_languages="$new_enable_languages"
2044   fi
2045
2046   AC_SUBST(stage1_languages)
2047   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2048 fi
2049
2050 # Handle --disable-<component> generically.
2051 for dir in $configdirs $build_configdirs $target_configdirs ; do
2052   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2053   varname=`echo $dirname | sed -e s/+/_/g`
2054   if eval test x\${enable_${varname}} "=" xno ; then
2055     noconfigdirs="$noconfigdirs $dir"
2056   fi
2057 done
2058
2059 # Check for Boehm's garbage collector
2060 AC_ARG_ENABLE(objc-gc,
2061 [AS_HELP_STRING([--enable-objc-gc],
2062                 [enable use of Boehm's garbage collector with the
2063                  GNU Objective-C runtime])],
2064 [case ,${enable_languages},:${enable_objc_gc}:${noconfigdirs} in
2065   *,objc,*:*:yes:*target-boehm-gc*)
2066     AC_MSG_ERROR([Boehm's garbage collector was requested yet not supported in this configuration])
2067     ;;
2068 esac])
2069
2070 # Make sure we only build Boehm's garbage collector if required.
2071 case ,${enable_languages},:${enable_objc_gc} in
2072   *,objc,*:yes)
2073     # Keep target-boehm-gc if requested for Objective-C.
2074     ;;
2075   *)
2076     # Otherwise remove target-boehm-gc.
2077     noconfigdirs="$noconfigdirs target-boehm-gc"
2078     ;;
2079 esac
2080
2081 # Disable libcilkrts, libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2082 case ,${enable_languages}, in
2083   *,c++,*)
2084     # Disable libcilkrts, libitm, libsanitizer if we're not building libstdc++
2085     case "${noconfigdirs}" in
2086       *target-libstdc++-v3*)
2087         noconfigdirs="$noconfigdirs target-libcilkrts target-libitm target-libsanitizer"
2088         ;;
2089       *) ;;
2090     esac
2091     ;;
2092   *)
2093     noconfigdirs="$noconfigdirs target-libcilkrts target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2094     ;;
2095 esac
2096
2097 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2098 # $build_configdirs and $target_configdirs.
2099 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2100
2101 notsupp=""
2102 for dir in . $skipdirs $noconfigdirs ; do
2103   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2104   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2105     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2106     if test -r $srcdir/$dirname/configure ; then
2107       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2108         true
2109       else
2110         notsupp="$notsupp $dir"
2111       fi
2112     fi
2113   fi
2114   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2115     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2116     if test -r $srcdir/$dirname/configure ; then
2117       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2118         true
2119       else
2120         notsupp="$notsupp $dir"
2121       fi
2122     fi
2123   fi
2124   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2125     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2126     if test -r $srcdir/$dirname/configure ; then
2127       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2128         true
2129       else
2130         notsupp="$notsupp $dir"
2131       fi
2132     fi
2133   fi
2134 done
2135
2136 # Quietly strip out all directories which aren't configurable in this tree.
2137 # This relies on all configurable subdirectories being autoconfiscated, which
2138 # is now the case.
2139 build_configdirs_all="$build_configdirs"
2140 build_configdirs=
2141 for i in ${build_configdirs_all} ; do
2142   j=`echo $i | sed -e s/build-//g`
2143   if test -f ${srcdir}/$j/configure ; then
2144     build_configdirs="${build_configdirs} $i"
2145   fi
2146 done
2147
2148 configdirs_all="$configdirs"
2149 configdirs=
2150 for i in ${configdirs_all} ; do
2151   if test -f ${srcdir}/$i/configure ; then
2152     configdirs="${configdirs} $i"
2153   fi
2154 done
2155
2156 target_configdirs_all="$target_configdirs"
2157 target_configdirs=
2158 for i in ${target_configdirs_all} ; do
2159   j=`echo $i | sed -e s/target-//g`
2160   if test -f ${srcdir}/$j/configure ; then
2161     target_configdirs="${target_configdirs} $i"
2162   fi
2163 done
2164
2165 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2166 # so we have to add it after the preceding checks.
2167 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2168 then
2169   case " $configdirs " in
2170     *" libiberty "*)
2171       # If we can build libiberty, we can also build libiberty-linker-plugin.
2172       configdirs="$configdirs libiberty-linker-plugin"
2173       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2174         --with-libiberty=../libiberty-linker-plugin";;
2175     *)
2176       AC_MSG_ERROR([libiberty missing]);;
2177   esac
2178 fi
2179
2180 # Sometimes we have special requirements for the host libiberty.
2181 extra_host_libiberty_configure_flags=
2182 extra_host_zlib_configure_flags=
2183 case " $configdirs " in
2184   *" lto-plugin "* | *" libcc1 "*)
2185     # When these are to be built as shared libraries, the same applies to
2186     # libiberty.
2187     extra_host_libiberty_configure_flags=--enable-shared
2188     ;;
2189   *" bfd "*)
2190     # When bfd is to be built as a shared library, the same applies to
2191     # zlib.
2192     if test "$enable_shared" = "yes"; then
2193       extra_host_zlib_configure_flags=--enable-host-shared
2194     fi
2195     ;;
2196 esac
2197 AC_SUBST(extra_host_libiberty_configure_flags)
2198 AC_SUBST(extra_host_zlib_configure_flags)
2199
2200 # Produce a warning message for the subdirs we can't configure.
2201 # This isn't especially interesting in the Cygnus tree, but in the individual
2202 # FSF releases, it's important to let people know when their machine isn't
2203 # supported by the one or two programs in a package.
2204
2205 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2206   # If $appdirs is non-empty, at least one of those directories must still
2207   # be configured, or we error out.  (E.g., if the gas release supports a
2208   # specified target in some subdirs but not the gas subdir, we shouldn't
2209   # pretend that all is well.)
2210   if test -n "$appdirs" ; then
2211     for dir in $appdirs ; do
2212       if test -r $dir/Makefile.in ; then
2213         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2214           appdirs=""
2215           break
2216         fi
2217         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2218           appdirs=""
2219           break
2220         fi
2221       fi
2222     done
2223     if test -n "$appdirs" ; then
2224       echo "*** This configuration is not supported by this package." 1>&2
2225       exit 1
2226     fi
2227   fi
2228   # Okay, some application will build, or we don't care to check.  Still
2229   # notify of subdirs not getting built.
2230   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2231   echo "    ${notsupp}" 1>&2
2232   echo "    (Any other directories should still work fine.)" 1>&2
2233 fi
2234
2235 case "$host" in
2236   *msdosdjgpp*)
2237     enable_gdbtk=no ;;
2238 esac
2239
2240 # To find our prefix, in gcc_cv_tool_prefix.
2241 ACX_TOOL_DIRS
2242
2243 copy_dirs=
2244
2245 AC_ARG_WITH([build-sysroot],
2246   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2247                   [use sysroot as the system root during the build])],
2248   [if test x"$withval" != x ; then
2249      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2250    fi],
2251   [SYSROOT_CFLAGS_FOR_TARGET=])
2252 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2253
2254 AC_ARG_WITH([debug-prefix-map],
2255   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2256                   [map A to B, C to D ... in debug information])],
2257   [if test x"$withval" != x; then
2258      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2259      for debug_map in $withval; do
2260        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2261      done
2262    fi],
2263   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2264 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2265
2266 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2267 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2268 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2269 # We want to ensure that TARGET libraries (which we know are built with
2270 # gcc) are built with "-O2 -g", so include those options when setting
2271 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2272 if test "x$CFLAGS_FOR_TARGET" = x; then
2273   if test "x${is_cross_compiler}" = xyes; then
2274     CFLAGS_FOR_TARGET="-g -O2"
2275   else
2276     CFLAGS_FOR_TARGET=$CFLAGS
2277     case " $CFLAGS " in
2278       *" -O2 "*) ;;
2279       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2280     esac
2281     case " $CFLAGS " in
2282       *" -g "* | *" -g3 "*) ;;
2283       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2284     esac
2285   fi
2286 fi
2287 AC_SUBST(CFLAGS_FOR_TARGET)
2288
2289 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2290   if test "x${is_cross_compiler}" = xyes; then
2291     CXXFLAGS_FOR_TARGET="-g -O2"
2292   else
2293     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2294     case " $CXXFLAGS " in
2295       *" -O2 "*) ;;
2296       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2297     esac
2298     case " $CXXFLAGS " in
2299       *" -g "* | *" -g3 "*) ;;
2300       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2301     esac
2302   fi
2303 fi
2304 AC_SUBST(CXXFLAGS_FOR_TARGET)
2305
2306 AC_SUBST(LDFLAGS_FOR_TARGET)
2307
2308 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2309 # the named directory are copied to $(tooldir)/sys-include.
2310 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2311   if test x${is_cross_compiler} = xno ; then
2312     echo 1>&2 '***' --with-headers is only supported when cross compiling
2313     exit 1
2314   fi
2315   if test x"${with_headers}" != xyes ; then
2316     x=${gcc_cv_tool_prefix}
2317     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2318   fi
2319 fi
2320
2321 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2322 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2323 # are permitted.
2324 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2325   if test x${is_cross_compiler} = xno ; then
2326     echo 1>&2 '***' --with-libs is only supported when cross compiling
2327     exit 1
2328   fi
2329   if test x"${with_libs}" != xyes ; then
2330     # Copy the libraries in reverse order, so that files in the first named
2331     # library override files in subsequent libraries.
2332     x=${gcc_cv_tool_prefix}
2333     for l in ${with_libs}; do
2334       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2335     done
2336   fi
2337 fi
2338
2339 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2340 #
2341 # This is done by determining whether or not the appropriate directory
2342 # is available, and by checking whether or not specific configurations
2343 # have requested that this magic not happen.
2344 #
2345 # The command line options always override the explicit settings in
2346 # configure.ac, and the settings in configure.ac override this magic.
2347 #
2348 # If the default for a toolchain is to use GNU as and ld, and you don't
2349 # want to do that, then you should use the --without-gnu-as and
2350 # --without-gnu-ld options for the configure script.  Similarly, if
2351 # the default is to use the included zlib and you don't want to do that,
2352 # you should use the --with-system-zlib option for the configure script.
2353
2354 if test x${use_gnu_as} = x &&
2355    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2356   with_gnu_as=yes
2357   extra_host_args="$extra_host_args --with-gnu-as"
2358 fi
2359
2360 if test x${use_gnu_ld} = x &&
2361    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2362   with_gnu_ld=yes
2363   extra_host_args="$extra_host_args --with-gnu-ld"
2364 fi
2365
2366 if test x${use_included_zlib} = x &&
2367    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2368   :
2369 else
2370   with_system_zlib=yes
2371   extra_host_args="$extra_host_args --with-system-zlib"
2372 fi
2373
2374 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2375 # can detect this case.
2376
2377 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2378   with_newlib=yes
2379   extra_host_args="$extra_host_args --with-newlib"
2380 fi
2381
2382 # Handle ${copy_dirs}
2383 set fnord ${copy_dirs}
2384 shift
2385 while test $# != 0 ; do
2386   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2387     :
2388   else
2389     echo Copying $1 to $2
2390
2391     # Use the install script to create the directory and all required
2392     # parent directories.
2393     if test -d $2 ; then
2394       :
2395     else
2396       echo >config.temp
2397       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2398     fi
2399
2400     # Copy the directory, assuming we have tar.
2401     # FIXME: Should we use B in the second tar?  Not all systems support it.
2402     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2403
2404     # It is the responsibility of the user to correctly adjust all
2405     # symlinks.  If somebody can figure out how to handle them correctly
2406     # here, feel free to add the code.
2407
2408     echo $1 > $2/COPIED
2409   fi
2410   shift; shift
2411 done
2412
2413 # Determine a target-dependent exec_prefix that the installed
2414 # gcc will search in.  Keep this list sorted by triplet, with
2415 # the *-*-osname triplets last.
2416 md_exec_prefix=
2417 case "${target}" in
2418   i[[34567]]86-pc-msdosdjgpp*)
2419     md_exec_prefix=/dev/env/DJDIR/bin
2420     ;;
2421   *-*-hpux* | \
2422   *-*-nto-qnx* | \
2423   *-*-solaris2*)
2424     md_exec_prefix=/usr/ccs/bin
2425     ;;
2426 esac
2427
2428 extra_arflags_for_target=
2429 extra_nmflags_for_target=
2430 extra_ranlibflags_for_target=
2431 target_makefile_frag=/dev/null
2432 case "${target}" in
2433   spu-*-*)
2434     target_makefile_frag="config/mt-spu"
2435     ;;
2436   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2437     target_makefile_frag="config/mt-sde"
2438     ;;
2439   mipsisa*-*-elfoabi*)
2440     target_makefile_frag="config/mt-mips-elfoabi"
2441     ;;
2442   mips*-*-*linux* | mips*-*-gnu*)
2443     target_makefile_frag="config/mt-mips-gnu"
2444     ;;
2445   nios2-*-elf*)
2446     target_makefile_frag="config/mt-nios2-elf"
2447     ;;
2448   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2449     target_makefile_frag="config/mt-gnu"
2450     ;;
2451   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2452     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2453     # commands to handle both 32-bit and 64-bit objects.  These flags are
2454     # harmless if we're using GNU nm or ar.
2455     extra_arflags_for_target=" -X32_64"
2456     extra_nmflags_for_target=" -B -X32_64"
2457     ;;
2458 esac
2459
2460 alphaieee_frag=/dev/null
2461 case $target in
2462   alpha*-*-*)
2463     # This just makes sure to use the -mieee option to build target libs.
2464     # This should probably be set individually by each library.
2465     alphaieee_frag="config/mt-alphaieee"
2466     ;;
2467 esac
2468
2469 # If --enable-target-optspace always use -Os instead of -O2 to build
2470 # the target libraries, similarly if it is not specified, use -Os
2471 # on selected platforms.
2472 ospace_frag=/dev/null
2473 case "${enable_target_optspace}:${target}" in
2474   yes:*)
2475     ospace_frag="config/mt-ospace"
2476     ;;
2477   :d30v-*)
2478     ospace_frag="config/mt-d30v"
2479     ;;
2480   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2481     ospace_frag="config/mt-ospace"
2482     ;;
2483   no:* | :*)
2484     ;;
2485   *)
2486     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2487     ;;
2488 esac
2489
2490 # Some systems (e.g., one of the i386-aix systems the gas testers are
2491 # using) don't handle "\$" correctly, so don't use it here.
2492 tooldir='${exec_prefix}'/${target_noncanonical}
2493 build_tooldir=${tooldir}
2494
2495 # Create a .gdbinit file which runs the one in srcdir
2496 # and tells GDB to look there for source files.
2497
2498 if test -r ${srcdir}/.gdbinit ; then
2499   case ${srcdir} in
2500     .) ;;
2501     *) cat > ./.gdbinit <<EOF
2502 # ${NO_EDIT}
2503 dir ${srcdir}
2504 dir .
2505 source ${srcdir}/.gdbinit
2506 EOF
2507     ;;
2508   esac
2509 fi
2510
2511 # Make sure that the compiler is able to generate an executable.  If it
2512 # can't, we are probably in trouble.  We don't care whether we can run the
2513 # executable--we might be using a cross compiler--we only care whether it
2514 # can be created.  At this point the main configure script has set CC.
2515 we_are_ok=no
2516 echo "int main () { return 0; }" > conftest.c
2517 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2518 if test $? = 0 ; then
2519   if test -s conftest || test -s conftest.exe ; then
2520     we_are_ok=yes
2521   fi
2522 fi
2523 case $we_are_ok in
2524   no)
2525     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2526     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2527     rm -f conftest*
2528     exit 1
2529     ;;
2530 esac
2531 rm -f conftest*
2532
2533 # Decide which environment variable is used to find dynamic libraries.
2534 case "${host}" in
2535   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2536   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2537   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2538   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2539 esac
2540
2541 # On systems where the dynamic library environment variable is PATH,
2542 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2543 # built executables to PATH.
2544 if test "$RPATH_ENVVAR" = PATH; then
2545   GCC_SHLIB_SUBDIR=/shlib
2546 else
2547   GCC_SHLIB_SUBDIR=
2548 fi
2549
2550 # Adjust the toplevel makefile according to whether bootstrap was selected.
2551 case $enable_bootstrap in
2552   yes)
2553     bootstrap_suffix=bootstrap
2554     BUILD_CONFIG=bootstrap-debug
2555     ;;
2556   no)
2557     bootstrap_suffix=no-bootstrap
2558     BUILD_CONFIG=
2559     ;;
2560 esac
2561
2562 AC_MSG_CHECKING(for default BUILD_CONFIG)
2563
2564 AC_ARG_WITH([build-config],
2565   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2566                   [use config/NAME.mk build configuration])],
2567   [case $with_build_config in
2568    yes) with_build_config= ;;
2569    no) with_build_config= BUILD_CONFIG= ;;
2570    esac])
2571
2572 if test "x${with_build_config}" != x; then
2573   BUILD_CONFIG=$with_build_config
2574 else
2575   case $BUILD_CONFIG in
2576   bootstrap-debug)
2577     if echo "int f (void) { return 0; }" > conftest.c &&
2578        ${CC} -c conftest.c &&
2579        mv conftest.o conftest.o.g0 &&
2580        ${CC} -c -g conftest.c &&
2581        mv conftest.o conftest.o.g &&
2582        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2583       :
2584     else
2585       BUILD_CONFIG=
2586     fi
2587     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2588     ;;
2589   esac
2590 fi
2591 AC_MSG_RESULT($BUILD_CONFIG)
2592 AC_SUBST(BUILD_CONFIG)
2593
2594 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2595 AC_MSG_CHECKING([for --enable-vtable-verify])
2596 AC_ARG_ENABLE(vtable-verify,
2597 [AS_HELP_STRING([--enable-vtable-verify],
2598                 [Enable vtable verification feature])],
2599 [case "$enableval" in
2600  yes) enable_vtable_verify=yes ;;
2601  no)  enable_vtable_verify=no ;;
2602  *)   enable_vtable_verify=no;;
2603  esac],
2604 [enable_vtable_verify=no])
2605 AC_MSG_RESULT($enable_vtable_verify)
2606
2607 # Record target_configdirs and the configure arguments for target and
2608 # build configuration in Makefile.
2609 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2610 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2611 bootstrap_fixincludes=no
2612
2613 # If we are building libgomp, bootstrap it.
2614 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2615   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2616 fi
2617
2618 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2619 # or bootstrap-ubsan, bootstrap it.
2620 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2621   case "$BUILD_CONFIG" in
2622     *bootstrap-asan* | *bootstrap-ubsan* )
2623       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2624       bootstrap_fixincludes=yes
2625       ;;
2626   esac
2627 fi
2628
2629 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2630 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2631    test "$enable_vtable_verify" != no; then
2632   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2633 fi
2634
2635 # If we are building libmpx, bootstrap it.
2636 if echo " ${target_configdirs} " | grep " libmpx " > /dev/null 2>&1; then
2637   bootstrap_target_libs=${bootstrap_target_libs}target-libmpx,
2638 fi
2639
2640 # Determine whether gdb needs tk/tcl or not.
2641 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2642 # and in that case we want gdb to be built without tk.  Ugh!
2643 # In fact I believe gdb is the *only* package directly dependent on tk,
2644 # so we should be able to put the 'maybe's in unconditionally and
2645 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2646 # 100% sure that that's safe though.
2647
2648 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2649 case "$enable_gdbtk" in
2650   no)
2651     GDB_TK="" ;;
2652   yes)
2653     GDB_TK="${gdb_tk}" ;;
2654   *)
2655     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2656     # distro.  Eventually someone will fix this and move Insight, nee
2657     # gdbtk to a separate directory.
2658     if test -d ${srcdir}/gdb/gdbtk ; then
2659       GDB_TK="${gdb_tk}"
2660     else
2661       GDB_TK=""
2662     fi
2663     ;;
2664 esac
2665 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2666 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2667
2668 # Strip out unwanted targets.
2669
2670 # While at that, we remove Makefiles if we were started for recursive
2671 # configuration, so that the top-level Makefile reconfigures them,
2672 # like we used to do when configure itself was recursive.
2673
2674 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2675 # but now we're fixing up the Makefile ourselves with the additional
2676 # commands passed to AC_CONFIG_FILES.  Use separate variables
2677 # extrasub-{build,host,target} not because there is any reason to split
2678 # the substitutions up that way, but only to remain below the limit of
2679 # 99 commands in a script, for HP-UX sed.
2680 # Do not nest @if/@endif pairs, because configure will not warn you at all.
2681
2682 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2683   yes:yes:*\ gold\ *:*,c++,*) ;;
2684   yes:yes:*\ gold\ *:*)
2685     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2686     ;;
2687 esac
2688
2689 extrasub_build=
2690 for module in ${build_configdirs} ; do
2691   if test -z "${no_recursion}" \
2692      && test -f ${build_subdir}/${module}/Makefile; then
2693     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2694     rm -f ${build_subdir}/${module}/Makefile
2695   fi
2696   extrasub_build="$extrasub_build
2697 /^@if build-$module\$/d
2698 /^@endif build-$module\$/d
2699 /^@if build-$module-$bootstrap_suffix\$/d
2700 /^@endif build-$module-$bootstrap_suffix\$/d"
2701 done
2702 extrasub_host=
2703 for module in ${configdirs} ; do
2704   if test -z "${no_recursion}"; then
2705     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2706       if test -f ${file}; then
2707         echo 1>&2 "*** removing ${file} to force reconfigure"
2708         rm -f ${file}
2709       fi
2710     done
2711   fi
2712   case ${module},${bootstrap_fixincludes} in
2713     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2714     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2715   esac
2716   extrasub_host="$extrasub_host
2717 /^@if $module\$/d
2718 /^@endif $module\$/d
2719 /^@if $module-$host_bootstrap_suffix\$/d
2720 /^@endif $module-$host_bootstrap_suffix\$/d"
2721 done
2722 extrasub_target=
2723 for module in ${target_configdirs} ; do
2724   if test -z "${no_recursion}" \
2725      && test -f ${target_subdir}/${module}/Makefile; then
2726     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2727     rm -f ${target_subdir}/${module}/Makefile
2728   fi
2729
2730   # We only bootstrap target libraries listed in bootstrap_target_libs.
2731   case $bootstrap_target_libs in
2732     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2733     *) target_bootstrap_suffix=no-bootstrap ;;
2734   esac
2735
2736   extrasub_target="$extrasub_target
2737 /^@if target-$module\$/d
2738 /^@endif target-$module\$/d
2739 /^@if target-$module-$target_bootstrap_suffix\$/d
2740 /^@endif target-$module-$target_bootstrap_suffix\$/d"
2741 done
2742
2743 # Do the final fixup along with target modules.
2744 extrasub_target="$extrasub_target
2745 /^@if /,/^@endif /d"
2746
2747 # Create the serialization dependencies.  This uses a temporary file.
2748
2749 AC_ARG_ENABLE([serial-configure],
2750 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
2751                 [force sequential configuration of
2752                  sub-packages for the host, target or build
2753                  machine, or all sub-packages])])
2754
2755 case ${enable_serial_configure} in
2756   yes)
2757     enable_serial_build_configure=yes
2758     enable_serial_host_configure=yes
2759     enable_serial_target_configure=yes
2760     ;;
2761 esac
2762
2763 # These force 'configure's to be done one at a time, to avoid problems
2764 # with contention over a shared config.cache.
2765 rm -f serdep.tmp
2766 echo '# serdep.tmp' > serdep.tmp
2767 olditem=
2768 test "x${enable_serial_build_configure}" = xyes &&
2769 for item in ${build_configdirs} ; do
2770   case ${olditem} in
2771     "") ;;
2772     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
2773   esac
2774   olditem=${item}
2775 done
2776 olditem=
2777 test "x${enable_serial_host_configure}" = xyes &&
2778 for item in ${configdirs} ; do
2779   case ${olditem} in
2780     "") ;;
2781     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
2782   esac
2783   olditem=${item}
2784 done
2785 olditem=
2786 test "x${enable_serial_target_configure}" = xyes &&
2787 for item in ${target_configdirs} ; do
2788   case ${olditem} in
2789     "") ;;
2790     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
2791   esac
2792   olditem=${item}
2793 done
2794 serialization_dependencies=serdep.tmp
2795 AC_SUBST_FILE(serialization_dependencies)
2796
2797 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
2798 # target, nonopt, and variable assignments.  These are the ones we
2799 # might not want to pass down to subconfigures.  The exception being
2800 # --cache-file=/dev/null, which is used to turn off the use of cache
2801 # files altogether, and which should be passed on to subconfigures.
2802 # Also strip program-prefix, program-suffix, and program-transform-name,
2803 # so that we can pass down a consistent program-transform-name.
2804 baseargs=
2805 tbaseargs=
2806 keep_next=no
2807 skip_next=no
2808 eval "set -- $ac_configure_args"
2809 for ac_arg
2810 do
2811   if test X"$skip_next" = X"yes"; then
2812     skip_next=no
2813     continue
2814   fi
2815   if test X"$keep_next" = X"yes"; then
2816     case $ac_arg in
2817       *\'*)
2818         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2819     esac
2820     baseargs="$baseargs '$ac_arg'"
2821     tbaseargs="$tbaseargs '$ac_arg'"
2822     keep_next=no
2823     continue
2824   fi
2825
2826   # Handle separated arguments.  Based on the logic generated by
2827   # autoconf 2.59.
2828   case $ac_arg in
2829     *=* | --config-cache | -C | -disable-* | --disable-* \
2830       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
2831       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
2832       | -with-* | --with-* | -without-* | --without-* | --x)
2833       separate_arg=no
2834       ;;
2835     -*)
2836       separate_arg=yes
2837       ;;
2838     *)
2839       separate_arg=no
2840       ;;
2841   esac
2842
2843   skip_targ=no
2844   case $ac_arg in
2845 changequote(,)
2846   --with-* | --without-*)
2847     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
2848
2849     case $libopt in
2850     *[-_]include)
2851       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
2852       ;;
2853     *[-_]lib)
2854       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
2855       ;;
2856     *)
2857       lib=$libopt
2858       ;;
2859     esac
2860 changequote([,])
2861
2862     case $lib in
2863     mpc | mpfr | gmp | isl)
2864       # If we're processing --with-$lib, --with-$lib-include or
2865       # --with-$lib-lib, for one of the libs above, and target is
2866       # different from host, don't pass the current argument to any
2867       # target library's configure.
2868       if test x$is_cross_compiler = xyes; then
2869         skip_targ=yes
2870       fi
2871       ;;
2872     esac
2873     ;;
2874   esac
2875
2876   case "$ac_arg" in
2877     --cache-file=/dev/null | \
2878     -cache-file=/dev/null )
2879       # Handled here to avoid the test to skip args below.
2880       baseargs="$baseargs '$ac_arg'"
2881       tbaseargs="$tbaseargs '$ac_arg'"
2882       # Assert: $separate_arg should always be no.
2883       keep_next=$separate_arg
2884       ;;
2885     --no*)
2886       continue
2887       ;;
2888     --c* | \
2889     --sr* | \
2890     --ho* | \
2891     --bu* | \
2892     --t* | \
2893     --program-* | \
2894     -cache_file* | \
2895     -srcdir* | \
2896     -host* | \
2897     -build* | \
2898     -target* | \
2899     -program-prefix* | \
2900     -program-suffix* | \
2901     -program-transform-name* )
2902       skip_next=$separate_arg
2903       continue
2904       ;;
2905     -*)
2906       # An option.  Add it.
2907       case $ac_arg in
2908         *\'*)
2909           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2910       esac
2911       baseargs="$baseargs '$ac_arg'"
2912       if test X"$skip_targ" = Xno; then
2913         tbaseargs="$tbaseargs '$ac_arg'"
2914       fi
2915       keep_next=$separate_arg
2916       ;;
2917     *)
2918       # Either a variable assignment, or a nonopt (triplet).  Don't
2919       # pass it down; let the Makefile handle this.
2920       continue
2921       ;;
2922   esac
2923 done
2924 # Remove the initial space we just introduced and, as these will be
2925 # expanded by make, quote '$'.
2926 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
2927
2928 # Add in --program-transform-name, after --program-prefix and
2929 # --program-suffix have been applied to it.  Autoconf has already
2930 # doubled dollar signs and backslashes in program_transform_name; we want
2931 # the backslashes un-doubled, and then the entire thing wrapped in single
2932 # quotes, because this will be expanded first by make and then by the shell.
2933 # Also, because we want to override the logic in subdir configure scripts to
2934 # choose program_transform_name, replace any s,x,x, with s,y,y,.
2935 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
2936 ${program_transform_name}
2937 EOF_SED
2938 gcc_transform_name=`cat conftestsed.out`
2939 rm -f conftestsed.out
2940 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
2941 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
2942 if test "$silent" = yes; then
2943   baseargs="$baseargs --silent"
2944   tbaseargs="$tbaseargs --silent"
2945 fi
2946 baseargs="$baseargs --disable-option-checking"
2947 tbaseargs="$tbaseargs --disable-option-checking"
2948
2949 # Record and document user additions to sub configure arguments.
2950 AC_ARG_VAR([build_configargs],
2951            [additional configure arguments for build directories])
2952 AC_ARG_VAR([host_configargs],
2953            [additional configure arguments for host directories])
2954 AC_ARG_VAR([target_configargs],
2955            [additional configure arguments for target directories])
2956
2957 # For the build-side libraries, we just need to pretend we're native,
2958 # and not use the same cache file.  Multilibs are neither needed nor
2959 # desired.  We can't even use the same cache file for all build-side
2960 # libraries, as they're compiled differently; some with C, some with
2961 # C++ or with different feature-enabling options.
2962 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
2963
2964 # For host modules, accept cache file option, or specification as blank.
2965 case "${cache_file}" in
2966 "") # empty
2967   cache_file_option="" ;;
2968 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
2969   cache_file_option="--cache-file=${cache_file}" ;;
2970 *) # relative path
2971   cache_file_option="--cache-file=../${cache_file}" ;;
2972 esac
2973
2974 # Host dirs don't like to share a cache file either, horribly enough.
2975 # This seems to be due to autoconf 2.5x stupidity.
2976 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
2977
2978 target_configargs="$target_configargs ${tbaseargs}"
2979
2980 # Passing a --with-cross-host argument lets the target libraries know
2981 # whether they are being built with a cross-compiler or being built
2982 # native.  However, it would be better to use other mechanisms to make the
2983 # sorts of decisions they want to make on this basis.  Please consider
2984 # this option to be deprecated.  FIXME.
2985 if test x${is_cross_compiler} = xyes ; then
2986   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
2987 fi
2988
2989 # Special user-friendly check for native x86_64-linux build, if
2990 # multilib is not explicitly enabled.
2991 case "$target:$have_compiler:$host:$target:$enable_multilib" in
2992   x86_64-*linux*:yes:$build:$build:)
2993     # Make sure we have a development environment that handles 32-bit
2994     dev64=no
2995     echo "int main () { return 0; }" > conftest.c
2996     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2997     if test $? = 0 ; then
2998       if test -s conftest || test -s conftest.exe ; then
2999         dev64=yes
3000       fi
3001     fi
3002     rm -f conftest*
3003     if test x${dev64} != xyes ; then
3004       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.])
3005     fi
3006     ;;
3007 esac
3008
3009 # Default to --enable-multilib.
3010 if test x${enable_multilib} = x ; then
3011   target_configargs="--enable-multilib ${target_configargs}"
3012 fi
3013
3014 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3015 # changed from the earlier setting of with_newlib.
3016 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3017   target_configargs="--with-newlib ${target_configargs}"
3018 fi
3019
3020 # Different target subdirs use different values of certain variables
3021 # (notably CXX).  Worse, multilibs use *lots* of different values.
3022 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3023 # it doesn't automatically accept command-line overrides of them.
3024 # This means it's not safe for target subdirs to share a cache file,
3025 # which is disgusting, but there you have it.  Hopefully this can be
3026 # fixed in future.  It's still worthwhile to use a cache file for each
3027 # directory.  I think.
3028
3029 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3030 # We need to pass --target, as newer autoconf's requires consistency
3031 # for target_alias and gcc doesn't manage it consistently.
3032 target_configargs="--cache-file=./config.cache ${target_configargs}"
3033
3034 FLAGS_FOR_TARGET=
3035 case " $target_configdirs " in
3036  *" newlib "*)
3037   case " $target_configargs " in
3038   *" --with-newlib "*)
3039    case "$target" in
3040     *-cygwin*)
3041       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3042       ;;
3043    esac
3044
3045    # If we're not building GCC, don't discard standard headers.
3046    if test -d ${srcdir}/gcc; then
3047      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3048
3049      if test "${build}" != "${host}"; then
3050        # On Canadian crosses, CC_FOR_TARGET will have already been set
3051        # by `configure', so we won't have an opportunity to add -Bgcc/
3052        # to it.  This is right: we don't want to search that directory
3053        # for binaries, but we want the header files in there, so add
3054        # them explicitly.
3055        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3056
3057        # Someone might think of using the pre-installed headers on
3058        # Canadian crosses, in case the installed compiler is not fully
3059        # compatible with the compiler being built.  In this case, it
3060        # would be better to flag an error than risking having
3061        # incompatible object files being constructed.  We can't
3062        # guarantee that an error will be flagged, but let's hope the
3063        # compiler will do it, when presented with incompatible header
3064        # files.
3065      fi
3066    fi
3067
3068    case "${target}-${is_cross_compiler}" in
3069    i[[3456789]]86-*-linux*-no)
3070       # Here host == target, so we don't need to build gcc,
3071       # so we don't want to discard standard headers.
3072       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3073       ;;
3074    *)
3075       # If we're building newlib, use its generic headers last, but search
3076       # for any libc-related directories first (so make it the last -B
3077       # switch).
3078       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3079
3080       # If we're building libgloss, find the startup file, simulator library
3081       # and linker script.
3082       case " $target_configdirs " in
3083         *" libgloss "*)
3084         # Look for startup file, simulator library and maybe linker script.
3085         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3086         # Look for libnosys.a in case the target needs it.
3087         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3088         # Most targets have the linker script in the source directory.
3089         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3090         ;;
3091       esac
3092       ;;
3093    esac
3094    ;;
3095   esac
3096   ;;
3097 esac
3098
3099 case "$target" in
3100   x86_64-*mingw* | *-w64-mingw*)
3101   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3102   # however, use a symlink named 'mingw' in ${prefix} .
3103     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3104     ;;
3105   *-mingw*)
3106   # MinGW can't be handled as Cygwin above since it does not use newlib.
3107     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3108     ;;
3109 esac
3110
3111 # Allow the user to override the flags for
3112 # our build compiler if desired.
3113 if test x"${build}" = x"${host}" ; then
3114   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3115   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3116   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3117 fi
3118
3119 # On Canadian crosses, we'll be searching the right directories for
3120 # the previously-installed cross compiler, so don't bother to add
3121 # flags for directories within the install tree of the compiler
3122 # being built; programs in there won't even run.
3123 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3124   # Search for pre-installed headers if nothing else fits.
3125   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3126 fi
3127
3128 if test "x${use_gnu_ld}" = x &&
3129    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3130   # Arrange for us to find uninstalled linker scripts.
3131   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3132 fi
3133
3134 # Search for other target-specific linker scripts and such.
3135 case "${target}" in
3136   mep*)
3137     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3138     ;;
3139 esac
3140
3141 # Makefile fragments.
3142 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3143 do
3144   eval fragval=\$$frag
3145   if test $fragval != /dev/null; then
3146     eval $frag=${srcdir}/$fragval
3147   fi
3148 done
3149 AC_SUBST_FILE(host_makefile_frag)
3150 AC_SUBST_FILE(target_makefile_frag)
3151 AC_SUBST_FILE(alphaieee_frag)
3152 AC_SUBST_FILE(ospace_frag)
3153
3154 # Miscellanea: directories, flags, etc.
3155 AC_SUBST(RPATH_ENVVAR)
3156 AC_SUBST(GCC_SHLIB_SUBDIR)
3157 AC_SUBST(tooldir)
3158 AC_SUBST(build_tooldir)
3159 AC_SUBST(CONFIGURE_GDB_TK)
3160 AC_SUBST(GDB_TK)
3161 AC_SUBST(INSTALL_GDB_TK)
3162
3163 # Build module lists & subconfigure args.
3164 AC_SUBST(build_configargs)
3165 AC_SUBST(build_configdirs)
3166
3167 # Host module lists & subconfigure args.
3168 AC_SUBST(host_configargs)
3169 AC_SUBST(configdirs)
3170 AC_SUBST(target_configdirs)
3171
3172 # Target module lists & subconfigure args.
3173 AC_SUBST(target_configargs)
3174
3175
3176 # Build tools.
3177 AC_SUBST(AR_FOR_BUILD)
3178 AC_SUBST(AS_FOR_BUILD)
3179 AC_SUBST(CC_FOR_BUILD)
3180 AC_SUBST(CFLAGS_FOR_BUILD)
3181 AC_SUBST(CXXFLAGS_FOR_BUILD)
3182 AC_SUBST(CXX_FOR_BUILD)
3183 AC_SUBST(DLLTOOL_FOR_BUILD)
3184 AC_SUBST(GFORTRAN_FOR_BUILD)
3185 AC_SUBST(GOC_FOR_BUILD)
3186 AC_SUBST(LDFLAGS_FOR_BUILD)
3187 AC_SUBST(LD_FOR_BUILD)
3188 AC_SUBST(NM_FOR_BUILD)
3189 AC_SUBST(RANLIB_FOR_BUILD)
3190 AC_SUBST(WINDMC_FOR_BUILD)
3191 AC_SUBST(WINDRES_FOR_BUILD)
3192
3193 # Generate default definitions for YACC, M4, LEX and other programs that run
3194 # on the build machine.  These are used if the Makefile can't locate these
3195 # programs in objdir.
3196 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3197
3198 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3199 case " $build_configdirs " in
3200   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3201 esac
3202
3203 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3204 case " $build_configdirs " in
3205   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3206 esac
3207
3208 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3209 case " $build_configdirs " in
3210   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3211 esac
3212
3213 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3214 case " $build_configdirs " in
3215   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3216   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3217 esac
3218
3219 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3220 case " $build_configdirs " in
3221   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3222 esac
3223
3224 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3225 case " $build_configdirs " in
3226   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3227   *)
3228 changequote(,)
3229     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3230     # higher, else we use the "missing" dummy.
3231     if ${MAKEINFO} --version \
3232        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3233       :
3234     else
3235       MAKEINFO="$MISSING makeinfo"
3236     fi
3237     ;;
3238 changequote([,])
3239 esac
3240
3241 # FIXME: expect and dejagnu may become build tools?
3242
3243 AC_CHECK_PROGS(EXPECT, expect, expect)
3244 case " $configdirs " in
3245   *" expect "*)
3246     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3247     ;;
3248 esac
3249
3250 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3251 case " $configdirs " in
3252   *" dejagnu "*)
3253     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3254     ;;
3255 esac
3256
3257
3258 # Host tools.
3259 NCN_STRICT_CHECK_TOOLS(AR, ar)
3260 NCN_STRICT_CHECK_TOOLS(AS, as)
3261 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3262 NCN_STRICT_CHECK_TOOLS(LD, ld)
3263 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3264 NCN_STRICT_CHECK_TOOLS(NM, nm)
3265 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3266 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3267 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3268 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3269 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3270 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3271 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3272 AC_SUBST(CC)
3273 AC_SUBST(CXX)
3274 AC_SUBST(CFLAGS)
3275 AC_SUBST(CXXFLAGS)
3276
3277 # Target tools.
3278 AC_ARG_WITH([build-time-tools],
3279   [AS_HELP_STRING([--with-build-time-tools=PATH],
3280                   [use given path to find target tools during the build])],
3281   [case x"$withval" in
3282      x/*) ;;
3283      *)
3284        with_build_time_tools=
3285        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3286        ;;
3287    esac],
3288   [with_build_time_tools=])
3289
3290 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3291 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3292 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3293 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3294 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3295
3296 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3297 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3298 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3299 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3300 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3301 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3302 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3303 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3304 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3305 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3306 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3307 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3308 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3309
3310 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3311
3312 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3313 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3314 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3315 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3316 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3317                 [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],
3318                 c++)
3319 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3320                 [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],
3321                 c++)
3322 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3323 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3324 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3325                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3326 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3327                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3328 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3329 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3330 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3331 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3332 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3333 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3334 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3335 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3336 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3337 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3338
3339 AC_SUBST(FLAGS_FOR_TARGET)
3340 AC_SUBST(RAW_CXX_FOR_TARGET)
3341
3342 # Certain tools may need extra flags.
3343 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3344 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3345 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3346
3347 # When building target libraries, except in a Canadian cross, we use
3348 # the same toolchain as the compiler we just built.
3349 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3350 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3351 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3352 if test $host = $build; then
3353   case " $configdirs " in
3354     *" gcc "*)
3355       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3356       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3357       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3358       ;;
3359   esac
3360 fi
3361
3362 AC_SUBST(COMPILER_AS_FOR_TARGET)
3363 AC_SUBST(COMPILER_LD_FOR_TARGET)
3364 AC_SUBST(COMPILER_NM_FOR_TARGET)
3365
3366 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3367 AC_ARG_ENABLE(maintainer-mode,
3368 [AS_HELP_STRING([--enable-maintainer-mode],
3369                 [enable make rules and dependencies not useful
3370                  (and sometimes confusing) to the casual installer])],
3371       USE_MAINTAINER_MODE=$enableval,
3372       USE_MAINTAINER_MODE=no)
3373 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3374 AC_SUBST(MAINTAINER_MODE_TRUE)
3375 AC_SUBST(MAINTAINER_MODE_FALSE)
3376 if test "$USE_MAINTAINER_MODE" = yes; then
3377   MAINTAINER_MODE_TRUE=
3378   MAINTAINER_MODE_FALSE='#'
3379 else
3380   MAINTAINER_MODE_TRUE='#'
3381   MAINTAINER_MODE_FALSE=
3382 fi
3383 MAINT=$MAINTAINER_MODE_TRUE
3384 AC_SUBST(MAINT)dnl
3385
3386 # ---------------------
3387 # GCC bootstrap support
3388 # ---------------------
3389
3390 # Stage specific cflags for build.
3391 stage1_cflags="-g"
3392 case $build in
3393   vax-*-*)
3394     case ${GCC} in
3395       yes) stage1_cflags="-g -Wa,-J" ;;
3396       *) stage1_cflags="-g -J" ;;
3397     esac ;;
3398 esac
3399
3400 AC_SUBST(stage1_cflags)
3401
3402 # Enable --enable-checking in stage1 of the compiler.
3403 AC_ARG_ENABLE(stage1-checking,
3404 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3405                 [choose additional checking for stage1 of the compiler])],
3406 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3407 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3408   # For --disable-checking or implicit --enable-checking=release, avoid
3409   # setting --enable-checking=gc in the default stage1 checking for LTO
3410   # bootstraps.  See PR62077.
3411   case $BUILD_CONFIG in
3412     *lto*)
3413       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3414     *)
3415       stage1_checking=--enable-checking=yes,types;;
3416   esac
3417   if test "x$enable_checking" = x && \
3418      test -d ${srcdir}/gcc && \
3419      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3420     stage1_checking=--enable-checking=yes,types,extra
3421   fi
3422 else
3423   stage1_checking=--enable-checking=$enable_checking,types
3424 fi])
3425 AC_SUBST(stage1_checking)
3426
3427 # Enable -Werror in bootstrap stage2 and later.
3428 AC_ARG_ENABLE(werror,
3429 [AS_HELP_STRING([--enable-werror],
3430                 [enable -Werror in bootstrap stage2 and later])], [],
3431 [if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3432   enable_werror=yes
3433 else
3434   enable_werror=no
3435 fi])
3436 case ${enable_werror} in
3437   yes) stage2_werror_flag="--enable-werror-always" ;;
3438   *) stage2_werror_flag="" ;;
3439 esac
3440 AC_SUBST(stage2_werror_flag)
3441
3442 # Enable --enable-host-shared.
3443 AC_ARG_ENABLE(host-shared,
3444 [AS_HELP_STRING([--enable-host-shared],
3445                 [build host code as shared libraries])],
3446 [host_shared=$enableval], [host_shared=no])
3447 AC_SUBST(host_shared)
3448
3449 # PR jit/64780: Require the user to explicitly specify
3450 # --enable-host-shared if the jit is enabled, hinting
3451 # that they might want to do a separate configure/build of
3452 # the jit, to avoid users from slowing down the rest of the
3453 # compiler by enabling the jit.
3454 if test ${host_shared} = "no" ; then
3455   case "${enable_languages}" in
3456     *jit*)
3457       AC_MSG_ERROR([
3458 Enabling language "jit" requires --enable-host-shared.
3459
3460 --enable-host-shared typically slows the rest of the compiler down by
3461 a few %, so you must explicitly enable it.
3462
3463 If you want to build both the jit and the regular compiler, it is often
3464 best to do this via two separate configure/builds, in separate
3465 directories, to avoid imposing the performance cost of
3466 --enable-host-shared on the regular compiler.])
3467       ;;
3468     *)
3469       ;;
3470   esac
3471 fi
3472
3473 # Specify what files to not compare during bootstrap.
3474
3475 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3476 case "$target" in
3477   hppa*64*-*-hpux*) ;;
3478   hppa*-*-hpux*) compare_exclusions="gcc/cc*-checksum\$(objext) | */libgcc/lib2funcs* | gcc/ada/*tools/*" ;;
3479   powerpc*-ibm-aix*) compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/* | *libgomp*\$(objext)" ;;
3480 esac
3481 AC_SUBST(compare_exclusions)
3482
3483 AC_CONFIG_FILES([Makefile],
3484   [sed "$extrasub_build" Makefile |
3485    sed "$extrasub_host" |
3486    sed "$extrasub_target" > mf$$
3487    mv -f mf$$ Makefile],
3488   [extrasub_build="$extrasub_build"
3489    extrasub_host="$extrasub_host"
3490    extrasub_target="$extrasub_target"])
3491 AC_OUTPUT