configure.ac

   1 #   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2 #   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012,
   3 #   2014, 2015, 2016 Free Software Foundation, Inc.
   4 #
   5 # This file is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  18
  19 ##############################################################################
  20 ### WARNING: this file contains embedded tabs.  Do not run untabify on this file.
  21
  22 m4_include(config/acx.m4)
  23 m4_include(config/override.m4)
  24 m4_include(config/proginstall.m4)
  25 m4_include(config/elf.m4)
  26 m4_include([libtool.m4])
  27 m4_include([ltoptions.m4])
  28 m4_include([ltsugar.m4])
  29 m4_include([ltversion.m4])
  30 m4_include([lt~obsolete.m4])
  31 m4_include([config/isl.m4])
  32
  33 AC_INIT(move-if-change)
  34 AC_DISABLE_OPTION_CHECKING
  35
  36 progname=$0
  37 # if PWD already has a value, it is probably wrong.
  38 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  39
  40 # Export original configure arguments for use by sub-configures.
  41 # Quote arguments with shell meta charatcers.
  42 TOPLEVEL_CONFIGURE_ARGUMENTS=
  43 set -- "$progname" "$@"
  44 for ac_arg
  45 do
  46   case "$ac_arg" in
  47   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  48     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  49     # if the argument is of the form -foo=baz, quote the baz part only
  50     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  51   *) ;;
  52   esac
  53   # Add the quoted argument to the list.
  54   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  55 done
  56 if test "$silent" = yes; then
  57   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  58 fi
  59 # Remove the initial space we just introduced and, as these will be
  60 # expanded by make, quote '$'.
  61 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  62 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  63
  64 # Find the build, host, and target systems.
  65 ACX_NONCANONICAL_BUILD
  66 ACX_NONCANONICAL_HOST
  67 ACX_NONCANONICAL_TARGET
  68
  69 dnl Autoconf 2.5x and later will set a default program prefix if
  70 dnl --target was used, even if it was the same as --host.  Disable
  71 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  72 dnl to take effect.
  73 test "$host_noncanonical" = "$target_noncanonical" &&
  74   test "$program_prefix$program_suffix$program_transform_name" = \
  75     NONENONEs,x,x, &&
  76   program_transform_name=s,y,y,
  77
  78 AC_CANONICAL_SYSTEM
  79 AC_ARG_PROGRAM
  80
  81 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  82 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  83
  84 # Get 'install' or 'install-sh' and its variants.
  85 AC_PROG_INSTALL
  86 ACX_PROG_LN
  87 AC_PROG_LN_S
  88 AC_PROG_SED
  89 AC_PROG_AWK
  90
  91 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  92
  93 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  94 # a relative path.
  95 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  96   INSTALL="${srcpwd}/install-sh -c"
  97 fi
  98
  99 # Set srcdir to "." if that's what it is.
 100 # This is important for multilib support.
 101 pwd=`${PWDCMD-pwd}`
 102 if test "${pwd}" = "${srcpwd}" ; then
 103   srcdir=.
 104 fi
 105
 106 topsrcdir=$srcpwd
 107
 108 extra_host_args=
 109
 110 ### To add a new directory to the tree, first choose whether it is a target
 111 ### or a host dependent tool.  Then put it into the appropriate list
 112 ### (library or tools, host or target), doing a dependency sort.
 113
 114 # Subdirs will be configured in the order listed in build_configdirs,
 115 # configdirs, or target_configdirs; see the serialization section below.
 116
 117 # Dependency sorting is only needed when *configuration* must be done in
 118 # a particular order.  In all cases a dependency should be specified in
 119 # the Makefile, whether or not it's implicitly specified here.
 120
 121 # Double entries in build_configdirs, configdirs, or target_configdirs may
 122 # cause circular dependencies and break everything horribly.
 123
 124 # these library is used by various programs built for the build
 125 # environment
 126 #
 127 build_libs="build-libiberty build-libcpp"
 128
 129 # these tools are built for the build environment
 130 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 131
 132 # these libraries are used by various programs built for the host environment
 133 #f
 134 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libdecnumber gmp mpfr mpc isl libelf libiconv"
 135
 136 # these tools are built for the host environment
 137 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 138 # know that we are building the simulator.
 139 # binutils, gas and ld appear in that order because it makes sense to run
 140 # "make check" in that particular order.
 141 # If --enable-gold is used, "gold" may replace "ld".
 142 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools"
 143
 144 # these libraries are built for the target environment, and are built after
 145 # the host libraries and the host tools (which may be a cross compiler)
 146 # Note that libiberty is not a target library.
 147 target_libraries="target-libgcc \
 148                 target-libbacktrace \
 149                 target-libgloss \
 150                 target-newlib \
 151                 target-libgomp \
 152                 target-liboffloadmic \
 153                 target-libhsail-rt \
 154                 target-libatomic \
 155                 target-libitm \
 156                 target-libstdc++-v3 \
 157                 target-libsanitizer \
 158                 target-libvtv \
 159                 target-libssp \
 160                 target-libquadmath \
 161                 target-libgfortran \
 162                 target-libffi \
 163                 target-libobjc \
 164                 target-libada \
 165                 target-libgo \
 166                 target-libphobos"
 167
 168 # these tools are built using the target libraries, and are intended to
 169 # run only in the target environment
 170 #
 171 # note: any program that *uses* libraries that are in the "target_libraries"
 172 # list belongs in this list.
 173 #
 174 target_tools="target-rda"
 175
 176 ################################################################################
 177
 178 ## All tools belong in one of the four categories, and are assigned above
 179 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 180 ## is important because configure will choke if they ever get through.
 181 ## ${configdirs} is directories we build using the host tools.
 182 ## ${target_configdirs} is directories we build using the target tools.
 183 configdirs=`echo ${host_libs} ${host_tools}`
 184 target_configdirs=`echo ${target_libraries} ${target_tools}`
 185 build_configdirs=`echo ${build_libs} ${build_tools}`
 186
 187 m4_divert_text([PARSE_ARGS],
 188 [case $srcdir in
 189   *" "*)
 190 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 191     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 192 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 193     ;;
 194 esac
 195 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 196 ])
 197
 198 ################################################################################
 199
 200 srcname="gnu development package"
 201
 202 # This gets set non-empty for some net releases of packages.
 203 appdirs=""
 204
 205 # Define is_cross_compiler to save on calls to 'test'.
 206 is_cross_compiler=
 207 if test x"${host}" = x"${target}" ; then
 208   is_cross_compiler=no
 209 else
 210   is_cross_compiler=yes
 211 fi
 212
 213 # Find the build and target subdir names.
 214 GCC_TOPLEV_SUBDIRS
 215 # Be sure to cover against remnants of an in-tree build.
 216 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 217   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 218 Use a pristine source tree when building in a separate tree])
 219 fi
 220
 221 # Skipdirs are removed silently.
 222 skipdirs=
 223 # Noconfigdirs are removed loudly.
 224 noconfigdirs=""
 225
 226 use_gnu_ld=
 227 # Make sure we don't let GNU ld be added if we didn't want it.
 228 if test x$with_gnu_ld = xno ; then
 229   use_gnu_ld=no
 230   noconfigdirs="$noconfigdirs ld gold"
 231 fi
 232
 233 use_gnu_as=
 234 # Make sure we don't let GNU as be added if we didn't want it.
 235 if test x$with_gnu_as = xno ; then
 236   use_gnu_as=no
 237   noconfigdirs="$noconfigdirs gas"
 238 fi
 239
 240 use_included_zlib=
 241 AC_ARG_WITH(system-zlib,
 242 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 243 # Make sure we don't let ZLIB be added if we didn't want it.
 244 if test x$with_system_zlib = xyes ; then
 245   use_included_zlib=no
 246   noconfigdirs="$noconfigdirs zlib"
 247 fi
 248
 249 # some tools are so dependent upon X11 that if we're not building with X,
 250 # it's not even worth trying to configure, much less build, that tool.
 251
 252 case ${with_x} in
 253   yes | "") ;; # the default value for this tree is that X11 is available
 254   no)
 255     skipdirs="${skipdirs} tk itcl libgui"
 256     # We won't be able to build gdbtk without X.
 257     enable_gdbtk=no
 258     ;;
 259   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 260 esac
 261
 262 # Some are only suitable for cross toolchains.
 263 # Remove these if host=target.
 264 cross_only="target-libgloss target-newlib target-opcodes"
 265
 266 case $is_cross_compiler in
 267   no) skipdirs="${skipdirs} ${cross_only}" ;;
 268 esac
 269
 270 # If both --with-headers and --with-libs are specified, default to
 271 # --without-newlib.
 272 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 273    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 274   if test x"${with_newlib}" = x ; then
 275     with_newlib=no
 276   fi
 277 fi
 278
 279 # Recognize --with-newlib/--without-newlib.
 280 case ${with_newlib} in
 281   no) skipdirs="${skipdirs} target-newlib" ;;
 282   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 283 esac
 284
 285 AC_ARG_ENABLE(as-accelerator-for,
 286 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 287                 [build as offload target compiler.
 288                 Specify offload host triple by ARG])])
 289
 290 AC_ARG_ENABLE(offload-targets,
 291 [AS_HELP_STRING([--enable-offload-targets=LIST],
 292                 [enable offloading to devices from comma-separated LIST of
 293                 TARGET[=DIR]. Use optional path to find offload target compiler
 294                 during the build])],
 295 [
 296   if test x"$enable_offload_targets" = x; then
 297     AC_MSG_ERROR([no offload targets specified])
 298   fi
 299 ], [enable_offload_targets=])
 300
 301 # Handle --enable-gold, --enable-ld.
 302 # --disable-gold [--enable-ld]
 303 #     Build only ld.  Default option.
 304 # --enable-gold [--enable-ld]
 305 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 306 #     as "ld.bfd" and "ld".
 307 # --enable-gold=default [--enable-ld]
 308 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 309 #     install ld as "ld.bfd".
 310 # --enable-gold[=default] --disable-ld
 311 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 312 # --enable-gold --enable-ld=default
 313 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 314 #     and ld.bfd).
 315 #     In other words, ld is default
 316 # --enable-gold=default --enable-ld=default
 317 #     Error.
 318
 319 default_ld=
 320 AC_ARG_ENABLE(gold,
 321 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 322                 [build gold @<:@ARG={default,yes,no}@:>@])],
 323 ENABLE_GOLD=$enableval,
 324 ENABLE_GOLD=no)
 325 case "${ENABLE_GOLD}" in
 326   yes|default)
 327     # Check for ELF target.
 328     is_elf=no
 329     case "${target}" in
 330       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 331       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 332       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 333       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 334         case "${target}" in
 335           *-*-linux*aout* | *-*-linux*oldld*)
 336             ;;
 337           *)
 338             is_elf=yes
 339             ;;
 340         esac
 341     esac
 342
 343     if test "$is_elf" = "yes"; then
 344       # Check for target supported by gold.
 345       case "${target}" in
 346         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 347         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-*)
 348           configdirs="$configdirs gold"
 349           if test x${ENABLE_GOLD} = xdefault; then
 350             default_ld=gold
 351           fi
 352           ENABLE_GOLD=yes
 353           ;;
 354       esac
 355     fi
 356     ;;
 357   no)
 358     ;;
 359   *)
 360     AC_MSG_ERROR([invalid --enable-gold argument])
 361     ;;
 362 esac
 363
 364 AC_ARG_ENABLE(ld,
 365 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 366                 [build ld @<:@ARG={default,yes,no}@:>@])],
 367 ENABLE_LD=$enableval,
 368 ENABLE_LD=yes)
 369
 370 case "${ENABLE_LD}" in
 371   default)
 372     if test x${default_ld} != x; then
 373       AC_MSG_ERROR([either gold or ld can be the default ld])
 374     fi
 375     ;;
 376   yes)
 377     ;;
 378   no)
 379     if test x${ENABLE_GOLD} != xyes; then
 380       AC_MSG_WARN([neither ld nor gold are enabled])
 381     fi
 382     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 383     ;;
 384   *)
 385     AC_MSG_ERROR([invalid --enable-ld argument])
 386     ;;
 387 esac
 388
 389 # PR gas/19109
 390 # Decide the default method for compressing debug sections.
 391 # Provide a configure time option to override our default.
 392 AC_ARG_ENABLE(compressed_debug_sections,
 393 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 394                 [Enable compressed debug sections for gas, gold or ld by
 395                  default])],
 396 [
 397   if test x"$enable_compressed_debug_sections" = xyes; then
 398     AC_MSG_ERROR([no program with compressed debug sections specified])
 399   fi
 400 ], [enable_compressed_debug_sections=])
 401
 402 # Configure extra directories which are host specific
 403
 404 case "${host}" in
 405   *-cygwin*)
 406     configdirs="$configdirs libtermcap" ;;
 407 esac
 408
 409 # A target can indicate whether a language isn't supported for some reason.
 410 # Only spaces may be used in this macro; not newlines or tabs.
 411 unsupported_languages=
 412
 413 # Remove more programs from consideration, based on the host or
 414 # target this usually means that a port of the program doesn't
 415 # exist yet.
 416
 417 case "${host}" in
 418   i[[3456789]]86-*-msdosdjgpp*)
 419     noconfigdirs="$noconfigdirs tcl tk itcl"
 420     ;;
 421 esac
 422
 423
 424 AC_ARG_ENABLE(libquadmath,
 425 AS_HELP_STRING([--disable-libquadmath],
 426   [do not build libquadmath directory]),
 427 ENABLE_LIBQUADMATH=$enableval,
 428 ENABLE_LIBQUADMATH=yes)
 429 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 430   noconfigdirs="$noconfigdirs target-libquadmath"
 431 fi
 432
 433
 434 AC_ARG_ENABLE(libquadmath-support,
 435 AS_HELP_STRING([--disable-libquadmath-support],
 436   [disable libquadmath support for Fortran]),
 437 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 438 ENABLE_LIBQUADMATH_SUPPORT=yes)
 439 enable_libquadmath_support=
 440 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 441   enable_libquadmath_support=no
 442 fi
 443
 444
 445 AC_ARG_ENABLE(libada,
 446 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 447 ENABLE_LIBADA=$enableval,
 448 ENABLE_LIBADA=yes)
 449 if test "${ENABLE_LIBADA}" != "yes" ; then
 450   noconfigdirs="$noconfigdirs gnattools"
 451 fi
 452
 453 AC_ARG_ENABLE(libssp,
 454 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 455 ENABLE_LIBSSP=$enableval,
 456 ENABLE_LIBSSP=yes)
 457
 458 AC_ARG_ENABLE(libstdcxx,
 459 AS_HELP_STRING([--disable-libstdcxx],
 460   [do not build libstdc++-v3 directory]),
 461 ENABLE_LIBSTDCXX=$enableval,
 462 ENABLE_LIBSTDCXX=default)
 463 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 464   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 465 fi]
 466
 467 # If this is accelerator compiler and its target is intelmic we enable
 468 # target liboffloadmic by default.  If this is compiler with offloading
 469 # for intelmic we enable host liboffloadmic by default.  Otherwise
 470 # liboffloadmic is disabled by default.
 471 AC_ARG_ENABLE([liboffloadmic],
 472 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 473                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 474 [case "$enableval" in
 475   no | host | target)
 476     enable_liboffloadmic=$enableval ;;
 477   *)
 478     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 479 esac],
 480 [if test x"$enable_as_accelerator_for" != x; then
 481   case "${target}" in
 482     *-intelmic-* | *-intelmicemul-*)
 483       enable_liboffloadmic=target
 484       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 485       ;;
 486     *)
 487       enable_liboffloadmic=no
 488       ;;
 489   esac
 490 else
 491   case "${enable_offload_targets}" in
 492     *-intelmic-* | *-intelmicemul-*)
 493       enable_liboffloadmic=host
 494       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 495       ;;
 496     *)
 497       enable_liboffloadmic=no
 498       ;;
 499     esac
 500 fi])
 501 AC_SUBST(extra_liboffloadmic_configure_flags)
 502
 503 # Enable libgomp by default on hosted POSIX systems, and a few others.
 504 if test x$enable_libgomp = x ; then
 505     case "${target}" in
 506     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 507         ;;
 508     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 509         ;;
 510     *-*-solaris2* | *-*-hpux11*)
 511         ;;
 512     *-*-darwin* | *-*-aix*)
 513         ;;
 514     nvptx*-*-*)
 515         ;;
 516     *)
 517         noconfigdirs="$noconfigdirs target-libgomp"
 518         ;;
 519     esac
 520 fi
 521
 522 # Disable libatomic on unsupported systems.
 523 if test -d ${srcdir}/libatomic; then
 524     if test x$enable_libatomic = x; then
 525         AC_MSG_CHECKING([for libatomic support])
 526         if (srcdir=${srcdir}/libatomic; \
 527                 . ${srcdir}/configure.tgt; \
 528                 test -n "$UNSUPPORTED")
 529         then
 530             AC_MSG_RESULT([no])
 531             noconfigdirs="$noconfigdirs target-libatomic"
 532         else
 533             AC_MSG_RESULT([yes])
 534         fi
 535     fi
 536 fi
 537
 538 # Disable liboffloadmic on unsupported systems.
 539 if test -d ${srcdir}/liboffloadmic; then
 540     if test x$enable_liboffloadmic != xno; then
 541         AC_MSG_CHECKING([for liboffloadmic support])
 542         if (srcdir=${srcdir}/liboffloadmic; \
 543                 . ${srcdir}/configure.tgt; \
 544                 test -n "$UNSUPPORTED")
 545         then
 546             AC_MSG_RESULT([no])
 547             noconfigdirs="$noconfigdirs target-liboffloadmic"
 548         else
 549             AC_MSG_RESULT([yes])
 550         fi
 551     fi
 552 fi
 553
 554 # Disable libitm on unsupported systems.
 555 if test -d ${srcdir}/libitm; then
 556     if test x$enable_libitm = x; then
 557         AC_MSG_CHECKING([for libitm support])
 558         if (srcdir=${srcdir}/libitm; \
 559                 . ${srcdir}/configure.tgt; \
 560                 test -n "$UNSUPPORTED")
 561         then
 562             AC_MSG_RESULT([no])
 563             noconfigdirs="$noconfigdirs target-libitm"
 564         else
 565             AC_MSG_RESULT([yes])
 566         fi
 567     fi
 568 fi
 569
 570 # Disable libsanitizer on unsupported systems.
 571 if test -d ${srcdir}/libsanitizer; then
 572     if test x$enable_libsanitizer = x; then
 573         AC_MSG_CHECKING([for libsanitizer support])
 574         if (srcdir=${srcdir}/libsanitizer; \
 575                 . ${srcdir}/configure.tgt; \
 576                 test -n "$UNSUPPORTED")
 577         then
 578             AC_MSG_RESULT([no])
 579             noconfigdirs="$noconfigdirs target-libsanitizer"
 580         else
 581             AC_MSG_RESULT([yes])
 582         fi
 583     fi
 584 fi
 585
 586 # Disable libvtv on unsupported systems.
 587 if test -d ${srcdir}/libvtv; then
 588     if test x$enable_libvtv = x; then
 589         AC_MSG_CHECKING([for libvtv support])
 590         if (srcdir=${srcdir}/libvtv; \
 591                 . ${srcdir}/configure.tgt; \
 592                 test "$VTV_SUPPORTED" != "yes")
 593         then
 594             AC_MSG_RESULT([no])
 595             noconfigdirs="$noconfigdirs target-libvtv"
 596         else
 597             AC_MSG_RESULT([yes])
 598         fi
 599     fi
 600 fi
 601
 602
 603 # Disable libhsail-rt on unsupported systems.
 604 if test -d ${srcdir}/libhsail-rt; then
 605     if test x$enable_libhsail_rt = x; then
 606         AC_MSG_CHECKING([for libhsail-rt support])
 607         if (srcdir=${srcdir}/libhsail-rt; \
 608                 . ${srcdir}/configure.tgt; \
 609                 test -n "$UNSUPPORTED")
 610         then
 611             AC_MSG_RESULT([no])
 612             unsupported_languages="$unsupported_languages brig"
 613             # This implicitly disables also target-libhsail-rt as it won't
 614             # get added to the build without BRIG FE.
 615         else
 616             AC_MSG_RESULT([yes])
 617         fi
 618     fi
 619 fi
 620
 621
 622 # Disable libquadmath for some systems.
 623 case "${target}" in
 624   avr-*-*)
 625     noconfigdirs="$noconfigdirs target-libquadmath"
 626     ;;
 627   # libquadmath is unused on AIX and libquadmath build process use of
 628   # LD_LIBRARY_PATH can break AIX bootstrap.
 629   powerpc-*-aix* | rs6000-*-aix*)
 630     noconfigdirs="$noconfigdirs target-libquadmath"
 631     ;;
 632 esac
 633
 634 # Disable libssp for some systems.
 635 case "${target}" in
 636   avr-*-*)
 637     # No hosted I/O support.
 638     noconfigdirs="$noconfigdirs target-libssp"
 639     ;;
 640   powerpc-*-aix* | rs6000-*-aix*)
 641     noconfigdirs="$noconfigdirs target-libssp"
 642     ;;
 643   rl78-*-*)
 644     # libssp uses a misaligned load to trigger a fault, but the RL78
 645     # doesn't fault for those - instead, it gives a build-time error
 646     # for explicit misaligned loads.
 647     noconfigdirs="$noconfigdirs target-libssp"
 648     ;;
 649   visium-*-*)
 650     # No hosted I/O support.
 651     noconfigdirs="$noconfigdirs target-libssp"
 652     ;;
 653 esac
 654
 655 # Disable libstdc++-v3 for some systems.
 656 # Allow user to override this if they pass --enable-libstdc++-v3
 657 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 658   case "${target}" in
 659     *-*-vxworks*)
 660       # VxWorks uses the Dinkumware C++ library.
 661       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 662       ;;
 663     arm*-wince-pe*)
 664       # the C++ libraries don't build on top of CE's C libraries
 665       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 666       ;;
 667     avr-*-*)
 668       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 669       ;;
 670     ft32-*-*)
 671       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 672       ;;
 673   esac
 674 fi
 675
 676 # Disable D on systems where it is known to not work.
 677 # For testing, you can override this with --enable-languages=d.
 678 case ,${enable_languages}, in
 679   *,d,*)
 680     ;;
 681   *)
 682     case "${target}" in
 683       *-*-darwin* | *-*-cygwin* | *-*-mingw*)
 684         unsupported_languages="$unsupported_languages d"
 685         ;;
 686     esac
 687     ;;
 688 esac
 689
 690 # Disable libphobos on unsupported systems.
 691 # For testing, you can override this with --enable-libphobos.
 692 if test -d ${srcdir}/libphobos; then
 693     if test x$enable_libphobos = x; then
 694         AC_MSG_CHECKING([for libphobos support])
 695         if (srcdir=${srcdir}/libphobos; \
 696                 . ${srcdir}/configure.tgt; \
 697                 test -n "$UNSUPPORTED")
 698         then
 699             AC_MSG_RESULT([no])
 700             noconfigdirs="$noconfigdirs target-libphobos"
 701         else
 702             AC_MSG_RESULT([yes])
 703         fi
 704     fi
 705 fi
 706
 707 # Disable Fortran for some systems.
 708 case "${target}" in
 709   mmix-*-*)
 710     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 711     unsupported_languages="$unsupported_languages fortran"
 712     ;;
 713 esac
 714
 715 # Disable libffi for some systems.
 716 case "${target}" in
 717   powerpc-*-darwin*)
 718     ;;
 719   i[[3456789]]86-*-darwin*)
 720     ;;
 721   x86_64-*-darwin[[912]]*)
 722     ;;
 723   *-*-darwin*)
 724     noconfigdirs="$noconfigdirs target-libffi"
 725     ;;
 726   *-*-netware*)
 727     noconfigdirs="$noconfigdirs target-libffi"
 728     ;;
 729   *-*-phoenix*)
 730     noconfigdirs="$noconfigdirs target-libffi"
 731     ;;
 732   *-*-rtems*)
 733     noconfigdirs="$noconfigdirs target-libffi"
 734     ;;
 735   *-*-tpf*)
 736     noconfigdirs="$noconfigdirs target-libffi"
 737     ;;
 738   *-*-uclinux*)
 739     noconfigdirs="$noconfigdirs target-libffi"
 740     ;;
 741   *-*-vxworks*)
 742     noconfigdirs="$noconfigdirs target-libffi"
 743     ;;
 744   aarch64*-*-freebsd*)
 745     noconfigdirs="$noconfigdirs target-libffi"
 746     ;;
 747   alpha*-*-*vms*)
 748     noconfigdirs="$noconfigdirs target-libffi"
 749     ;;
 750   arm*-*-freebsd*)
 751     noconfigdirs="$noconfigdirs target-libffi"
 752     ;;
 753   arm-wince-pe)
 754     noconfigdirs="$noconfigdirs target-libffi"
 755     ;;
 756   arm*-*-symbianelf*)
 757     noconfigdirs="$noconfigdirs target-libffi"
 758     ;;
 759   cris-*-* | crisv32-*-*)
 760     case "${target}" in
 761       *-*-linux*)
 762         ;;
 763       *) # See PR46792 regarding target-libffi.
 764         noconfigdirs="$noconfigdirs target-libffi";;
 765     esac
 766     ;;
 767   hppa*64*-*-hpux*)
 768     noconfigdirs="$noconfigdirs target-libffi"
 769     ;;
 770   hppa*-hp-hpux11*)
 771     ;;
 772   hppa*-*-hpux*)
 773     noconfigdirs="$noconfigdirs target-libffi"
 774     ;;
 775   ia64*-*-*vms*)
 776     noconfigdirs="$noconfigdirs target-libffi"
 777     ;;
 778   i[[3456789]]86-w64-mingw*)
 779     noconfigdirs="$noconfigdirs target-libffi"
 780     ;;
 781   i[[3456789]]86-*-mingw*)
 782     noconfigdirs="$noconfigdirs target-libffi"
 783     ;;
 784   x86_64-*-mingw*)
 785     noconfigdirs="$noconfigdirs target-libffi"
 786     ;;
 787   mmix-*-*)
 788     noconfigdirs="$noconfigdirs target-libffi"
 789     ;;
 790   powerpc-*-aix*)
 791     ;;
 792   rs6000-*-aix*)
 793     ;;
 794   ft32-*-*)
 795     noconfigdirs="$noconfigdirs target-libffi"
 796     ;;
 797   *-*-lynxos*)
 798     noconfigdirs="$noconfigdirs target-libffi"
 799     ;;
 800 esac
 801
 802 # Disable the go frontend on systems where it is known to not work. Please keep
 803 # this in sync with contrib/config-list.mk.
 804 case "${target}" in
 805 *-*-darwin* | *-*-cygwin* | *-*-mingw*)
 806     unsupported_languages="$unsupported_languages go"
 807     ;;
 808 esac
 809
 810 # Disable libgo for some systems where it is known to not work.
 811 # For testing, you can easily override this with --enable-libgo.
 812 if test x$enable_libgo = x; then
 813     case "${target}" in
 814     *-*-darwin*)
 815         # PR 46986
 816         noconfigdirs="$noconfigdirs target-libgo"
 817         ;;
 818     *-*-cygwin* | *-*-mingw*)
 819         noconfigdirs="$noconfigdirs target-libgo"
 820         ;;
 821     esac
 822 fi
 823
 824 # Default libgloss CPU subdirectory.
 825 libgloss_dir="$target_cpu"
 826
 827 case "${target}" in
 828   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 829     libgloss_dir=wince
 830     ;;
 831   aarch64*-*-* )
 832     libgloss_dir=aarch64
 833     ;;
 834   arm*-*-*)
 835     libgloss_dir=arm
 836     ;;
 837   cris-*-* | crisv32-*-*)
 838     libgloss_dir=cris
 839     ;;
 840   hppa*-*-*)
 841     libgloss_dir=pa
 842     ;;
 843   i[[3456789]]86-*-*)
 844     libgloss_dir=i386
 845     ;;
 846   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 847     libgloss_dir=m68hc11
 848     ;;
 849   m68*-*-* | fido-*-*)
 850     libgloss_dir=m68k
 851     ;;
 852   mips*-*-*)
 853     libgloss_dir=mips
 854     ;;
 855   powerpc*-*-*)
 856     libgloss_dir=rs6000
 857     ;;
 858   sparc*-*-*)
 859     libgloss_dir=sparc
 860     ;;
 861 esac
 862
 863 # Disable newlib and libgloss for various target OSes.
 864 case "${target}" in
 865   alpha*-dec-osf*)
 866     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 867     ;;
 868   i[[3456789]]86-*-linux*)
 869     # This section makes it possible to build newlib natively on linux.
 870     # If we are using a cross compiler then don't configure newlib.
 871     if test x${is_cross_compiler} != xno ; then
 872       noconfigdirs="$noconfigdirs target-newlib"
 873     fi
 874     noconfigdirs="$noconfigdirs target-libgloss"
 875     # If we are not using a cross compiler, do configure newlib.
 876     # Note however, that newlib will only be configured in this situation
 877     # if the --with-newlib option has been given, because otherwise
 878     # 'target-newlib' will appear in skipdirs.
 879     ;;
 880   i[[3456789]]86-*-rdos*)
 881     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 882     ;;
 883   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 884     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 885     ;;
 886   sparc-*-sunos4*)
 887     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 888     ;;
 889   *-*-aix*)
 890     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 891     ;;
 892   *-*-beos*)
 893     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 894     ;;
 895   *-*-chorusos)
 896     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 897     ;;
 898   *-*-dragonfly*)
 899     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 900     ;;
 901   *-*-freebsd*)
 902     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 903     ;;
 904   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 905     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 906     ;;
 907   *-*-lynxos*)
 908     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 909     ;;
 910   *-*-mingw*)
 911     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 912     ;;
 913   *-*-netbsd*)
 914     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 915     ;;
 916   *-*-netware*)
 917     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 918     ;;
 919   *-*-tpf*)
 920     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 921     ;;
 922   *-*-uclinux*)
 923     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 924     ;;
 925   *-*-vxworks*)
 926     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 927     ;;
 928 esac
 929
 930 case "${target}" in
 931   *-*-chorusos)
 932     ;;
 933   aarch64-*-darwin*)
 934     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 935     noconfigdirs="$noconfigdirs sim target-rda"
 936     ;;
 937   arm-*-darwin*)
 938     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 939     noconfigdirs="$noconfigdirs sim target-rda"
 940     ;;
 941   powerpc-*-darwin*)
 942     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 943     noconfigdirs="$noconfigdirs sim target-rda"
 944     ;;
 945   i[[3456789]]86-*-darwin*)
 946     noconfigdirs="$noconfigdirs ld gprof"
 947     noconfigdirs="$noconfigdirs sim target-rda"
 948     ;;
 949   x86_64-*-darwin[[912]]*)
 950     noconfigdirs="$noconfigdirs ld gas gprof"
 951     noconfigdirs="$noconfigdirs sim target-rda"
 952     ;;
 953   *-*-darwin*)
 954     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 955     noconfigdirs="$noconfigdirs sim target-rda"
 956     ;;
 957   *-*-dragonfly*)
 958     ;;
 959   *-*-freebsd*)
 960     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
 961         && test -f /usr/local/include/gmp.h; then
 962       with_gmp=/usr/local
 963     fi
 964     ;;
 965   *-*-kaos*)
 966     # Remove unsupported stuff on all kaOS configurations.
 967     noconfigdirs="$noconfigdirs target-libgloss"
 968     ;;
 969   *-*-netbsd*)
 970     ;;
 971   *-*-netware*)
 972     ;;
 973   *-*-phoenix*)
 974     noconfigdirs="$noconfigdirs target-libgloss"
 975     ;;
 976   *-*-rtems*)
 977     noconfigdirs="$noconfigdirs target-libgloss"
 978     ;;
 979     # The tpf target doesn't support gdb yet.
 980   *-*-tpf*)
 981     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
 982     ;;
 983   *-*-uclinux*)
 984     noconfigdirs="$noconfigdirs target-rda"
 985     ;;
 986   *-*-vxworks*)
 987     ;;
 988   alpha*-dec-osf*)
 989     # ld works, but does not support shared libraries.
 990     # gas doesn't generate exception information.
 991     noconfigdirs="$noconfigdirs gas ld"
 992     ;;
 993   alpha*-*-*vms*)
 994     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
 995     ;;
 996   alpha*-*-*)
 997     # newlib is not 64 bit ready
 998     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 999     ;;
1000   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1001     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1002     ;;
1003   arc*-*-*)
1004     noconfigdirs="$noconfigdirs sim"
1005     ;;
1006   arm-*-pe*)
1007     noconfigdirs="$noconfigdirs target-libgloss"
1008     ;;
1009   arm-*-riscix*)
1010     noconfigdirs="$noconfigdirs ld target-libgloss"
1011     ;;
1012   avr-*-*)
1013     if test x${with_avrlibc} != xno; then
1014       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1015     fi
1016     ;;
1017   c4x-*-* | tic4x-*-*)
1018     noconfigdirs="$noconfigdirs target-libgloss"
1019     ;;
1020   tic54x-*-*)
1021     noconfigdirs="$noconfigdirs target-libgloss gdb"
1022     ;;
1023   d10v-*-*)
1024     noconfigdirs="$noconfigdirs target-libgloss"
1025     ;;
1026   d30v-*-*)
1027     noconfigdirs="$noconfigdirs gdb"
1028     ;;
1029   fr30-*-elf*)
1030     noconfigdirs="$noconfigdirs gdb"
1031     ;;
1032   ft32-*-*)
1033     noconfigdirs="$noconfigdirs target-rda gprof"
1034     ;;
1035   moxie-*-*)
1036     noconfigdirs="$noconfigdirs"
1037     ;;
1038   h8300*-*-*)
1039     noconfigdirs="$noconfigdirs target-libgloss"
1040     ;;
1041   h8500-*-*)
1042     noconfigdirs="$noconfigdirs target-libgloss"
1043     ;;
1044   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1045     ;;
1046   hppa*64*-*-hpux*)
1047     noconfigdirs="$noconfigdirs gdb"
1048     ;;
1049   hppa*-*-hpux11*)
1050     noconfigdirs="$noconfigdirs gdb ld"
1051     ;;
1052   hppa*64*-*-linux*)
1053     ;;
1054   hppa*-*-linux*)
1055     ;;
1056   hppa*-*-*elf* | \
1057   hppa*-*-lites* | \
1058   hppa*-*-openbsd* | \
1059   hppa*64*-*-*)
1060     ;;
1061   hppa*-*-pro*)
1062     ;;
1063   hppa*-*-*)
1064     noconfigdirs="$noconfigdirs ld"
1065     ;;
1066   i960-*-*)
1067     noconfigdirs="$noconfigdirs gdb"
1068     ;;
1069   ia64*-*-elf*)
1070     # No gdb support yet.
1071     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1072     ;;
1073   ia64*-**-hpux*)
1074     # No ld support yet.
1075     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1076     ;;
1077   ia64*-*-*vms*)
1078     # No ld support yet.
1079     noconfigdirs="$noconfigdirs libgui itcl ld"
1080     ;;
1081   i[[3456789]]86-w64-mingw*)
1082     ;;
1083   i[[3456789]]86-*-mingw*)
1084     target_configdirs="$target_configdirs target-winsup"
1085     ;;
1086   *-*-cygwin*)
1087     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1088     noconfigdirs="$noconfigdirs target-libgloss"
1089     # always build newlib if winsup directory is present.
1090     if test -d "$srcdir/winsup/cygwin"; then
1091       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1092     elif test -d "$srcdir/newlib"; then
1093       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1094     fi
1095     ;;
1096   i[[3456789]]86-*-pe)
1097     noconfigdirs="$noconfigdirs target-libgloss"
1098     ;;
1099   i[[3456789]]86-*-sco3.2v5*)
1100     # The linker does not yet know about weak symbols in COFF,
1101     # and is not configured to handle mixed ELF and COFF.
1102     noconfigdirs="$noconfigdirs ld target-libgloss"
1103     ;;
1104   i[[3456789]]86-*-sco*)
1105     noconfigdirs="$noconfigdirs gprof target-libgloss"
1106     ;;
1107   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1108     noconfigdirs="$noconfigdirs target-libgloss"
1109     ;;
1110   i[[3456789]]86-*-sysv4*)
1111     noconfigdirs="$noconfigdirs target-libgloss"
1112     ;;
1113   i[[3456789]]86-*-beos*)
1114     noconfigdirs="$noconfigdirs gdb"
1115     ;;
1116   i[[3456789]]86-*-rdos*)
1117     noconfigdirs="$noconfigdirs gdb"
1118     ;;
1119   mmix-*-*)
1120     noconfigdirs="$noconfigdirs gdb"
1121     ;;
1122   mt-*-*)
1123     noconfigdirs="$noconfigdirs sim"
1124     ;;
1125   nfp-*-*)
1126     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1127     noconfigdirs="$noconfigdirs $target_libraries"
1128     ;;
1129   powerpc-*-aix*)
1130     # copied from rs6000-*-* entry
1131     noconfigdirs="$noconfigdirs gprof"
1132     ;;
1133   powerpc*-*-winnt* | powerpc*-*-pe*)
1134     target_configdirs="$target_configdirs target-winsup"
1135     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1136     # always build newlib.
1137     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1138     ;;
1139     # This is temporary until we can link against shared libraries
1140   powerpcle-*-solaris*)
1141     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1142     ;;
1143   powerpc-*-beos*)
1144     noconfigdirs="$noconfigdirs gdb"
1145     ;;
1146   rs6000-*-lynxos*)
1147     noconfigdirs="$noconfigdirs gprof"
1148     ;;
1149   rs6000-*-aix*)
1150     noconfigdirs="$noconfigdirs gprof"
1151     ;;
1152   rs6000-*-*)
1153     noconfigdirs="$noconfigdirs gprof"
1154     ;;
1155   m68k-apollo-*)
1156     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1157     ;;
1158   microblaze*)
1159     noconfigdirs="$noconfigdirs gprof"
1160     ;;
1161   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1162     if test x$with_newlib = xyes; then
1163       noconfigdirs="$noconfigdirs gprof"
1164     fi
1165     ;;
1166   mips*-*-irix5*)
1167     noconfigdirs="$noconfigdirs gprof target-libgloss"
1168     ;;
1169   mips*-*-irix6*)
1170     noconfigdirs="$noconfigdirs gprof target-libgloss"
1171     ;;
1172   mips*-*-bsd*)
1173     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1174     ;;
1175   mips*-*-linux*)
1176     ;;
1177   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1178   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1179     noconfigdirs="$noconfigdirs ld gas gprof"
1180     ;;
1181   mips*-*-*)
1182     noconfigdirs="$noconfigdirs gprof"
1183     ;;
1184   nvptx*-*-*)
1185     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1186     ;;
1187   sh-*-*)
1188     case "${target}" in
1189       sh*-*-elf)
1190          ;;
1191       *)
1192          noconfigdirs="$noconfigdirs target-libgloss" ;;
1193     esac
1194     ;;
1195   sparc-*-sunos4*)
1196     if test x${is_cross_compiler} = xno ; then
1197            use_gnu_ld=no
1198     fi
1199     ;;
1200   tic6x-*-*)
1201     noconfigdirs="$noconfigdirs sim"
1202     ;;
1203   tilepro*-*-* | tilegx*-*-*)
1204     noconfigdirs="$noconfigdirs sim"
1205     ;;
1206   v810-*-*)
1207     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1208     ;;
1209   vax-*-*)
1210     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1211     ;;
1212   wasm32-*-*)
1213     noconfigdirs="$noconfigdirs ld"
1214     ;;
1215 esac
1216
1217 # If we aren't building newlib, then don't build libgloss, since libgloss
1218 # depends upon some newlib header files.
1219 case "${noconfigdirs}" in
1220   *target-libgloss*) ;;
1221   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1222 esac
1223
1224 # Work in distributions that contain no compiler tools, like Autoconf.
1225 host_makefile_frag=/dev/null
1226 if test -d ${srcdir}/config ; then
1227 case "${host}" in
1228   i[[3456789]]86-*-msdosdjgpp*)
1229     host_makefile_frag="config/mh-djgpp"
1230     ;;
1231   *-cygwin*)
1232     ACX_CHECK_CYGWIN_CAT_WORKS
1233     host_makefile_frag="config/mh-cygwin"
1234     ;;
1235   *-mingw*)
1236     host_makefile_frag="config/mh-mingw"
1237     ;;
1238   alpha*-linux*)
1239     host_makefile_frag="config/mh-alpha-linux"
1240     ;;
1241   hppa*-hp-hpux10*)
1242     host_makefile_frag="config/mh-pa-hpux10"
1243     ;;
1244   hppa*-hp-hpux*)
1245     host_makefile_frag="config/mh-pa"
1246     ;;
1247   hppa*-*)
1248     host_makefile_frag="config/mh-pa"
1249     ;;
1250   *-*-darwin*)
1251     host_makefile_frag="config/mh-darwin"
1252     ;;
1253   powerpc-*-aix*)
1254     host_makefile_frag="config/mh-ppc-aix"
1255     ;;
1256   rs6000-*-aix*)
1257     host_makefile_frag="config/mh-ppc-aix"
1258     ;;
1259 esac
1260 fi
1261
1262 if test "${build}" != "${host}" ; then
1263   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1264   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1265   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1266   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1267   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1268   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1269   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1270   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1271   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1272   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1273   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1274   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1275   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1276 else
1277   AR_FOR_BUILD="\$(AR)"
1278   AS_FOR_BUILD="\$(AS)"
1279   CC_FOR_BUILD="\$(CC)"
1280   CXX_FOR_BUILD="\$(CXX)"
1281   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1282   GOC_FOR_BUILD="\$(GOC)"
1283   GDC_FOR_BUILD="\$(GDC)"
1284   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1285   LD_FOR_BUILD="\$(LD)"
1286   NM_FOR_BUILD="\$(NM)"
1287   RANLIB_FOR_BUILD="\$(RANLIB)"
1288   WINDRES_FOR_BUILD="\$(WINDRES)"
1289   WINDMC_FOR_BUILD="\$(WINDMC)"
1290 fi
1291
1292 AC_PROG_CC
1293 AC_PROG_CXX
1294
1295 # We must set the default linker to the linker used by gcc for the correct
1296 # operation of libtool.  If LD is not defined and we are using gcc, try to
1297 # set the LD default to the ld used by gcc.
1298 if test -z "$LD"; then
1299   if test "$GCC" = yes; then
1300     case $build in
1301     *-*-mingw*)
1302       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1303     *)
1304       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1305     esac
1306     case $gcc_prog_ld in
1307     # Accept absolute paths.
1308     [[\\/]* | [A-Za-z]:[\\/]*)]
1309       LD="$gcc_prog_ld" ;;
1310     esac
1311   fi
1312 fi
1313
1314 # Check whether -static-libstdc++ -static-libgcc is supported.
1315 have_static_libs=no
1316 if test "$GCC" = yes; then
1317   saved_LDFLAGS="$LDFLAGS"
1318
1319   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1320   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1321   AC_LANG_PUSH(C++)
1322   AC_LINK_IFELSE([AC_LANG_SOURCE([
1323 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1324 #error -static-libstdc++ not implemented
1325 #endif
1326 int main() {}])],
1327     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1328     [AC_MSG_RESULT([no])])
1329   AC_LANG_POP(C++)
1330
1331   LDFLAGS="$saved_LDFLAGS"
1332 fi
1333
1334 ACX_PROG_GNAT
1335 ACX_PROG_CMP_IGNORE_INITIAL
1336
1337 AC_ARG_ENABLE([bootstrap],
1338 [AS_HELP_STRING([--enable-bootstrap],
1339                 [enable bootstrapping @<:@yes if native build@:>@])],,
1340 enable_bootstrap=default)
1341
1342 # Issue errors and warnings for invalid/strange bootstrap combinations.
1343 if test -r $srcdir/gcc/configure; then
1344   have_compiler=yes
1345 else
1346   have_compiler=no
1347 fi
1348
1349 case "$have_compiler:$host:$target:$enable_bootstrap" in
1350   *:*:*:no) ;;
1351
1352   # Default behavior.  Enable bootstrap if we have a compiler
1353   # and we are in a native configuration.
1354   yes:$build:$build:default)
1355     enable_bootstrap=yes ;;
1356
1357   *:*:*:default)
1358     enable_bootstrap=no ;;
1359
1360   # We have a compiler and we are in a native configuration, bootstrap is ok
1361   yes:$build:$build:yes)
1362     ;;
1363
1364   # Other configurations, but we have a compiler.  Assume the user knows
1365   # what he's doing.
1366   yes:*:*:yes)
1367     AC_MSG_WARN([trying to bootstrap a cross compiler])
1368     ;;
1369
1370   # No compiler: if they passed --enable-bootstrap explicitly, fail
1371   no:*:*:yes)
1372     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1373
1374   # Fail if wrong command line
1375   *)
1376     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1377     ;;
1378 esac
1379
1380 # When bootstrapping with GCC, build stage 1 in C++98 mode to ensure that a
1381 # C++98 compiler can still start the bootstrap.
1382 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1383   CXX="$CXX -std=gnu++98"
1384 fi
1385
1386 # Used for setting $lt_cv_objdir
1387 _LT_CHECK_OBJDIR
1388
1389 # Check for GMP, MPFR and MPC
1390 gmplibs="-lmpc -lmpfr -lgmp"
1391 gmpinc=
1392 have_gmp=no
1393
1394 # Specify a location for mpc
1395 # check for this first so it ends up on the link line before mpfr.
1396 AC_ARG_WITH(mpc,
1397 [AS_HELP_STRING([--with-mpc=PATH],
1398                 [specify prefix directory for installed MPC package.
1399                  Equivalent to --with-mpc-include=PATH/include
1400                  plus --with-mpc-lib=PATH/lib])])
1401 AC_ARG_WITH(mpc-include,
1402 [AS_HELP_STRING([--with-mpc-include=PATH],
1403                 [specify directory for installed MPC include files])])
1404 AC_ARG_WITH(mpc-lib,
1405 [AS_HELP_STRING([--with-mpc-lib=PATH],
1406                 [specify directory for the installed MPC library])])
1407
1408 if test "x$with_mpc" != x; then
1409   gmplibs="-L$with_mpc/lib $gmplibs"
1410   gmpinc="-I$with_mpc/include $gmpinc"
1411 fi
1412 if test "x$with_mpc_include" != x; then
1413   gmpinc="-I$with_mpc_include $gmpinc"
1414 fi
1415 if test "x$with_mpc_lib" != x; then
1416   gmplibs="-L$with_mpc_lib $gmplibs"
1417 fi
1418 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1419   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1420   gmpinc='-I$$s/mpc/src '"$gmpinc"
1421   # Do not test the mpc version.  Assume that it is sufficient, since
1422   # it is in the source tree, and the library has not been built yet
1423   # but it would be included on the link line in the version check below
1424   # hence making the test fail.
1425   have_gmp=yes
1426 fi
1427
1428 # Specify a location for mpfr
1429 # check for this first so it ends up on the link line before gmp.
1430 AC_ARG_WITH(mpfr-dir,
1431 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1432 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1433 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1434
1435 AC_ARG_WITH(mpfr,
1436 [AS_HELP_STRING([--with-mpfr=PATH],
1437                 [specify prefix directory for installed MPFR package.
1438                  Equivalent to --with-mpfr-include=PATH/include
1439                  plus --with-mpfr-lib=PATH/lib])])
1440 AC_ARG_WITH(mpfr-include,
1441 [AS_HELP_STRING([--with-mpfr-include=PATH],
1442                 [specify directory for installed MPFR include files])])
1443 AC_ARG_WITH(mpfr-lib,
1444 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1445                 [specify directory for the installed MPFR library])])
1446
1447 if test "x$with_mpfr" != x; then
1448   gmplibs="-L$with_mpfr/lib $gmplibs"
1449   gmpinc="-I$with_mpfr/include $gmpinc"
1450 fi
1451 if test "x$with_mpfr_include" != x; then
1452   gmpinc="-I$with_mpfr_include $gmpinc"
1453 fi
1454 if test "x$with_mpfr_lib" != x; then
1455   gmplibs="-L$with_mpfr_lib $gmplibs"
1456 fi
1457 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1458   # MPFR v3.1.0 moved the sources into a src sub-directory.
1459   if ! test -d ${srcdir}/mpfr/src; then
1460     AC_MSG_ERROR([dnl
1461 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1462   fi
1463   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1464   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1465   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1466   # Do not test the mpfr version.  Assume that it is sufficient, since
1467   # it is in the source tree, and the library has not been built yet
1468   # but it would be included on the link line in the version check below
1469   # hence making the test fail.
1470   have_gmp=yes
1471 fi
1472
1473 # Specify a location for gmp
1474 AC_ARG_WITH(gmp-dir,
1475 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1476 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1477 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1478
1479 AC_ARG_WITH(gmp,
1480 [AS_HELP_STRING([--with-gmp=PATH],
1481                 [specify prefix directory for the installed GMP package.
1482                  Equivalent to --with-gmp-include=PATH/include
1483                  plus --with-gmp-lib=PATH/lib])])
1484 AC_ARG_WITH(gmp-include,
1485 [AS_HELP_STRING([--with-gmp-include=PATH],
1486                 [specify directory for installed GMP include files])])
1487 AC_ARG_WITH(gmp-lib,
1488 [AS_HELP_STRING([--with-gmp-lib=PATH],
1489                 [specify directory for the installed GMP library])])
1490
1491
1492 if test "x$with_gmp" != x; then
1493   gmplibs="-L$with_gmp/lib $gmplibs"
1494   gmpinc="-I$with_gmp/include $gmpinc"
1495 fi
1496 if test "x$with_gmp_include" != x; then
1497   gmpinc="-I$with_gmp_include $gmpinc"
1498 fi
1499 if test "x$with_gmp_lib" != x; then
1500   gmplibs="-L$with_gmp_lib $gmplibs"
1501 fi
1502 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1503   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1504   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1505   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1506   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1507   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1508   # Do not test the gmp version.  Assume that it is sufficient, since
1509   # it is in the source tree, and the library has not been built yet
1510   # but it would be included on the link line in the version check below
1511   # hence making the test fail.
1512   have_gmp=yes
1513 fi
1514
1515 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1516   have_gmp=yes
1517   saved_CFLAGS="$CFLAGS"
1518   CFLAGS="$CFLAGS $gmpinc"
1519   # Check for the recommended and required versions of GMP.
1520   AC_MSG_CHECKING([for the correct version of gmp.h])
1521   AC_TRY_COMPILE([#include "gmp.h"],[
1522   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1523   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1524   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1525   choke me
1526   #endif
1527   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1528   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1529   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1530   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1531   choke me
1532   #endif
1533   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1534    [AC_MSG_RESULT([no]); have_gmp=no])
1535
1536   # If we have GMP, check the MPFR version.
1537   if test x"$have_gmp" = xyes; then
1538     # Check for the recommended and required versions of MPFR.
1539     AC_MSG_CHECKING([for the correct version of mpfr.h])
1540     AC_TRY_COMPILE([#include <gmp.h>
1541     #include <mpfr.h>],[
1542     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,0)
1543     choke me
1544     #endif
1545     ], [AC_TRY_COMPILE([#include <gmp.h>
1546     #include <mpfr.h>],[
1547     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,2)
1548     choke me
1549     #endif
1550     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1551      [AC_MSG_RESULT([no]); have_gmp=no])
1552   fi
1553
1554   # Check for the MPC header version.
1555   if test x"$have_gmp" = xyes ; then
1556     # Check for the recommended and required versions of MPC.
1557     AC_MSG_CHECKING([for the correct version of mpc.h])
1558     AC_TRY_COMPILE([#include <mpc.h>],[
1559     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1560     choke me
1561     #endif
1562     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1563     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1564     choke me
1565     #endif
1566     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1567      [AC_MSG_RESULT([no]); have_gmp=no])
1568   fi
1569
1570   # Now check the MPFR library.
1571   if test x"$have_gmp" = xyes; then
1572     saved_LIBS="$LIBS"
1573     LIBS="$LIBS $gmplibs"
1574     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1575     AC_TRY_LINK([#include <mpc.h>],[
1576     mpfr_t n;
1577     mpfr_t x;
1578     mpc_t c;
1579     int t;
1580     mpfr_init (n);
1581     mpfr_init (x);
1582     mpfr_atan2 (n, n, x, GMP_RNDN);
1583     mpfr_erfc (n, x, GMP_RNDN);
1584     mpfr_subnormalize (x, t, GMP_RNDN);
1585     mpfr_clear(n);
1586     mpfr_clear(x);
1587     mpc_init2 (c, 53);
1588     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1589     mpc_cosh (c, c, MPC_RNDNN);
1590     mpc_pow (c, c, c, MPC_RNDNN);
1591     mpc_acosh (c, c, MPC_RNDNN);
1592     mpc_clear (c);
1593     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1594     LIBS="$saved_LIBS"
1595   fi
1596
1597   CFLAGS="$saved_CFLAGS"
1598
1599 # The library versions listed in the error message below should match
1600 # the HARD-minimums enforced above.
1601   if test x$have_gmp != xyes; then
1602     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
1603 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1604 their locations.  Source code for these libraries can be found at
1605 their respective hosting sites as well as at
1606 ftp://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1607 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1608 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1609 make sure that you have installed both the libraries and the header
1610 files.  They may be located in separate packages.])
1611   fi
1612 fi
1613
1614 # Flags needed for both GMP, MPFR and/or MPC.
1615 AC_SUBST(gmplibs)
1616 AC_SUBST(gmpinc)
1617 AC_SUBST(extra_mpfr_configure_flags)
1618 AC_SUBST(extra_mpc_gmp_configure_flags)
1619 AC_SUBST(extra_mpc_mpfr_configure_flags)
1620 AC_SUBST(extra_isl_gmp_configure_flags)
1621
1622 # Libraries to use for stage1 or when not bootstrapping.
1623 AC_ARG_WITH(stage1-libs,
1624 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1625 [if test "$withval" = "no" -o "$withval" = "yes"; then
1626    stage1_libs=
1627  else
1628    stage1_libs=$withval
1629  fi],
1630 [stage1_libs=])
1631 AC_SUBST(stage1_libs)
1632
1633 # Linker flags to use for stage1 or when not bootstrapping.
1634 AC_ARG_WITH(stage1-ldflags,
1635 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1636 [if test "$withval" = "no" -o "$withval" = "yes"; then
1637    stage1_ldflags=
1638  else
1639    stage1_ldflags=$withval
1640  fi],
1641 [stage1_ldflags=
1642  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1643  # if supported.  But if the user explicitly specified the libraries to use,
1644  # trust that they are doing what they want.
1645  if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
1646    stage1_ldflags="-static-libstdc++ -static-libgcc"
1647  fi])
1648 AC_SUBST(stage1_ldflags)
1649
1650 # Libraries to use for stage2 and later builds.
1651 AC_ARG_WITH(boot-libs,
1652 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1653 [if test "$withval" = "no" -o "$withval" = "yes"; then
1654    poststage1_libs=
1655  else
1656    poststage1_libs=$withval
1657  fi],
1658 [poststage1_libs=])
1659 AC_SUBST(poststage1_libs)
1660
1661 # Linker flags to use for stage2 and later builds.
1662 AC_ARG_WITH(boot-ldflags,
1663 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1664                 [linker flags for stage2 and later])],
1665 [if test "$withval" = "no" -o "$withval" = "yes"; then
1666    poststage1_ldflags=
1667  else
1668    poststage1_ldflags=$withval
1669  fi],
1670 [poststage1_ldflags=
1671  # In stages 2 and 3, default to linking libstdc++ and libgcc
1672  # statically.  But if the user explicitly specified the libraries to
1673  # use, trust that they are doing what they want.
1674  if test "$poststage1_libs" = ""; then
1675    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1676  fi])
1677 AC_SUBST(poststage1_ldflags)
1678
1679 # GCC GRAPHITE dependency isl.
1680 # Basic setup is inlined here, actual checks are in config/isl.m4
1681
1682 AC_ARG_WITH(isl,
1683   [AS_HELP_STRING(
1684    [--with-isl=PATH],
1685    [Specify prefix directory for the installed isl package.
1686     Equivalent to --with-isl-include=PATH/include
1687     plus --with-isl-lib=PATH/lib])])
1688
1689 # Treat --without-isl as a request to disable
1690 # GRAPHITE support and skip all following checks.
1691 if test "x$with_isl" != "xno"; then
1692   # Check for isl
1693   dnl Provide configure switches and initialize islinc & isllibs
1694   dnl with user input.
1695   ISL_INIT_FLAGS
1696   dnl The versions of isl that work for Graphite
1697   ISL_CHECK_VERSION()
1698   dnl Only execute fail-action, if isl has been requested.
1699   ISL_IF_FAILED([
1700     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1701 fi
1702
1703 # If the isl check failed, disable builds of in-tree variant of isl
1704 if test "x$with_isl" = xno ||
1705    test "x$gcc_cv_isl" = xno; then
1706   noconfigdirs="$noconfigdirs isl"
1707   islinc=
1708 fi
1709
1710 AC_SUBST(isllibs)
1711 AC_SUBST(islinc)
1712
1713 # Check for LTO support.
1714 AC_ARG_ENABLE(lto,
1715 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1716 enable_lto=$enableval,
1717 enable_lto=yes; default_enable_lto=yes)
1718
1719 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1720   build_lto_plugin=yes
1721 ],[if test x"$default_enable_lto" = x"yes" ; then
1722     case $target in
1723       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1724       # On other non-ELF platforms, LTO has yet to be validated.
1725       *) enable_lto=no ;;
1726     esac
1727   else
1728   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1729   # It would also be nice to check the binutils support, but we don't
1730   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1731   # warn during gcc/ subconfigure; unless you're bootstrapping with
1732   # -flto it won't be needed until after installation anyway.
1733     case $target in
1734       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1735       *) if test x"$enable_lto" = x"yes"; then
1736         AC_MSG_ERROR([LTO support is not enabled for this target.])
1737         fi
1738       ;;
1739     esac
1740   fi
1741   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1742   # Build it unless LTO was explicitly disabled.
1743   case $target in
1744     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1745     *) ;;
1746   esac
1747 ])
1748
1749 AC_ARG_ENABLE(linker-plugin-configure-flags,
1750   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1751     [additional flags for configuring linker plugins @<:@none@:>@])],
1752   extra_linker_plugin_configure_flags=$enableval,
1753   extra_linker_plugin_configure_flags=)
1754 AC_SUBST(extra_linker_plugin_configure_flags)
1755 AC_ARG_ENABLE(linker-plugin-flags,
1756   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1757     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1758   extra_linker_plugin_flags=$enableval,
1759   extra_linker_plugin_flags=)
1760 AC_SUBST(extra_linker_plugin_flags)
1761
1762 # Enable --enable-host-shared.
1763 # Checked early to determine whether jit is an 'all' language
1764 AC_ARG_ENABLE(host-shared,
1765 [AS_HELP_STRING([--enable-host-shared],
1766                 [build host code as shared libraries])],
1767 [host_shared=$enableval], [host_shared=no])
1768 AC_SUBST(host_shared)
1769
1770 # By default, C and C++ are the only stage 1 languages.
1771 stage1_languages=,c,
1772
1773 # Target libraries that we bootstrap.
1774 bootstrap_target_libs=,target-libgcc,
1775
1776 # Figure out what language subdirectories are present.
1777 # Look if the user specified --enable-languages="..."; if not, use
1778 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1779 # go away some day.
1780 # NB:  embedded tabs in this IF block -- do not untabify
1781 if test -d ${srcdir}/gcc; then
1782   if test x"${enable_languages+set}" != xset; then
1783     if test x"${LANGUAGES+set}" = xset; then
1784       enable_languages="${LANGUAGES}"
1785         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1786     else
1787       enable_languages=default
1788     fi
1789   else
1790     if test x"${enable_languages}" = x ||
1791        test x"${enable_languages}" = xyes;
1792        then
1793       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1794       exit 1
1795     fi
1796   fi
1797   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1798
1799   # 'f95' is the old name for the 'fortran' language. We issue a warning
1800   # and make the substitution.
1801   case ,${enable_languages}, in
1802     *,f95,*)
1803       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1804       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1805       ;;
1806   esac
1807
1808   # If bootstrapping, C++ must be enabled.
1809   case ",$enable_languages,:$enable_bootstrap" in
1810     *,c++,*:*) ;;
1811     *:yes)
1812       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1813         enable_languages="${enable_languages},c++"
1814       else
1815         AC_MSG_ERROR([bootstrapping requires c++ sources])
1816       fi
1817       ;;
1818   esac
1819
1820   # First scan to see if an enabled language requires some other language.
1821   # We assume that a given config-lang.in will list all the language
1822   # front ends it requires, even if some are required indirectly.
1823   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1824     case ${lang_frag} in
1825       ..) ;;
1826       # The odd quoting in the next line works around
1827       # an apparent bug in bash 1.12 on linux.
1828       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1829       *)
1830         # From the config-lang.in, get $language, $lang_requires, and
1831         # $lang_requires_boot_languages.
1832         language=
1833         lang_requires=
1834         lang_requires_boot_languages=
1835         # set srcdir during sourcing lang_frag to the gcc dir.
1836         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
1837         # polutes this shell
1838         saved_srcdir=${srcdir}
1839         srcdir=${srcdir}/gcc . ${lang_frag}
1840         srcdir=${saved_srcdir}
1841         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1842           case ,${enable_languages}, in
1843             *,$other,*) ;;
1844             *,default,*) ;;
1845             *,all,*) ;;
1846             *,$language,*)
1847               echo " \`$other' language required by \`$language'; enabling" 1>&2
1848               enable_languages="${enable_languages},${other}"
1849               ;;
1850           esac
1851         done
1852         for other in ${lang_requires_boot_languages} ; do
1853           if test "$other" != "c"; then
1854             case ,${enable_stage1_languages}, in
1855               *,$other,*) ;;
1856               *,default,*) ;;
1857               *,all,*) ;;
1858               *)
1859                 case ,${enable_languages}, in
1860                   *,$language,*)
1861                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1862                     enable_stage1_languages="$enable_stage1_languages,${other}"
1863                     ;;
1864                 esac
1865                 ;;
1866             esac
1867           fi
1868         done
1869         ;;
1870     esac
1871   done
1872
1873   new_enable_languages=,c,
1874
1875   # If LTO is enabled, add the LTO front end.
1876   if test "$enable_lto" = "yes" ; then
1877     case ,${enable_languages}, in
1878       *,lto,*) ;;
1879       *) enable_languages="${enable_languages},lto" ;;
1880     esac
1881     if test "${build_lto_plugin}" = "yes" ; then
1882       configdirs="$configdirs lto-plugin"
1883     fi
1884   fi
1885
1886   # If we're building an offloading compiler, add the LTO front end.
1887   if test x"$enable_as_accelerator_for" != x ; then
1888     case ,${enable_languages}, in
1889       *,lto,*) ;;
1890       *) enable_languages="${enable_languages},lto" ;;
1891     esac
1892   fi
1893
1894   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
1895   potential_languages=,c,
1896
1897   enabled_target_libs=
1898   disabled_target_libs=
1899
1900   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1901     case ${lang_frag} in
1902       ..) ;;
1903       # The odd quoting in the next line works around
1904       # an apparent bug in bash 1.12 on linux.
1905       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1906       *)
1907         # From the config-lang.in, get $language, $target_libs,
1908         # $lang_dirs, $boot_language, and $build_by_default
1909         language=
1910         target_libs=
1911         lang_dirs=
1912         subdir_requires=
1913         boot_language=no
1914         build_by_default=yes
1915         # set srcdir during sourcing.  See above about save & restore
1916         saved_srcdir=${srcdir}
1917         srcdir=${srcdir}/gcc . ${lang_frag}
1918         srcdir=${saved_srcdir}
1919         if test x${language} = x; then
1920           echo "${lang_frag} doesn't set \$language." 1>&2
1921           exit 1
1922         fi
1923
1924         if test "$language" = "c++"; then
1925           boot_language=yes
1926         fi
1927
1928         add_this_lang=no
1929         # C is always enabled, so no need to add it again
1930         if test "$language" != "c"; then
1931           case ,${enable_languages}, in
1932             *,${language},*)
1933               # Language was explicitly selected; include it
1934               add_this_lang=yes
1935               ;;
1936             *,all,*)
1937               # All languages are enabled
1938               add_this_lang=all
1939               ;;
1940             *,default,*)
1941               # 'default' was selected, select it if it is a default language
1942               add_this_lang=${build_by_default}
1943               ;;
1944           esac
1945         fi
1946
1947         # Disable languages that need other directories if these aren't available.
1948         for i in $subdir_requires; do
1949           test -f "$srcdir/gcc/$i/config-lang.in" && continue
1950           case ${add_this_lang} in
1951             yes)
1952               # Specifically requested language; tell them.
1953               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
1954               ;;
1955             all)
1956               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
1957               add_this_lang=unsupported
1958               ;;
1959             *)
1960               # Silently disable.
1961               add_this_lang=unsupported
1962               ;;
1963           esac
1964         done
1965
1966         # Disable Ada if no preexisting GNAT is available.
1967         case ${add_this_lang}:${language}:${have_gnat} in
1968           yes:ada:no)
1969             # Specifically requested language; tell them.
1970             AC_MSG_ERROR([GNAT is required to build $language])
1971             ;;
1972           all:ada:no)
1973             AC_MSG_WARN([GNAT is required to build $language])
1974             add_this_lang=unsupported
1975             ;;
1976           *:ada:no)
1977             # Silently disable.
1978             add_this_lang=unsupported
1979             ;;
1980         esac
1981
1982         # Disable jit if -enable-host-shared not specified
1983         case ${add_this_lang}:${language}:${host_shared} in
1984           yes:jit:no)
1985             # PR jit/64780: explicitly specify --enable-host-shared
1986             AC_MSG_ERROR([
1987 Enabling language "jit" requires --enable-host-shared.
1988
1989 --enable-host-shared typically slows the rest of the compiler down by
1990 a few %, so you must explicitly enable it.
1991
1992 If you want to build both the jit and the regular compiler, it is often
1993 best to do this via two separate configure/builds, in separate
1994 directories, to avoid imposing the performance cost of
1995 --enable-host-shared on the regular compiler.])
1996             ;;
1997           all:jit:no)
1998             AC_MSG_WARN([--enable-host-shared required to build $language])
1999             add_this_lang=unsupported
2000             ;;
2001           *:jit:no)
2002             # Silently disable.
2003             add_this_lang=unsupported
2004             ;;
2005         esac
2006
2007         # Disable a language that is unsupported by the target.
2008         case "${add_this_lang}: $unsupported_languages " in
2009           no:*) ;;
2010           unsupported:*) ;;
2011           *:*" $language "*)
2012             AC_MSG_WARN([${language} not supported for this target])
2013             add_this_lang=unsupported
2014             ;;
2015         esac
2016
2017         case $add_this_lang in
2018           unsupported)
2019             # Remove language-dependent dirs.
2020             disabled_target_libs="$disabled_target_libs $target_libs"
2021             noconfigdirs="$noconfigdirs $lang_dirs"
2022             ;;
2023           no)
2024             # Remove language-dependent dirs; still show language as supported.
2025             disabled_target_libs="$disabled_target_libs $target_libs"
2026             noconfigdirs="$noconfigdirs $lang_dirs"
2027             potential_languages="${potential_languages}${language},"
2028             ;;
2029           all|yes)
2030             new_enable_languages="${new_enable_languages}${language},"
2031             potential_languages="${potential_languages}${language},"
2032             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2033             enabled_target_libs="$enabled_target_libs $target_libs"
2034             case "${boot_language}:,$enable_stage1_languages," in
2035               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2036                 # Add to (comma-separated) list of stage 1 languages.
2037                 case ",$stage1_languages," in
2038                   *,$language,* | ,yes, | ,all,) ;;
2039                   *) stage1_languages="${stage1_languages}${language}," ;;
2040                 esac
2041                 # We need to bootstrap any supporting libraries.
2042                 bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
2043                 ;;
2044             esac
2045             ;;
2046         esac
2047         ;;
2048     esac
2049   done
2050
2051   # Add target libraries which are only needed for disabled languages
2052   # to noconfigdirs.
2053   if test -n "$disabled_target_libs"; then
2054     for dir in $disabled_target_libs; do
2055       case " $enabled_target_libs " in
2056       *" ${dir} "*) ;;
2057       *) noconfigdirs="$noconfigdirs $dir" ;;
2058       esac
2059     done
2060   fi
2061
2062   AC_ARG_ENABLE(stage1-languages,
2063   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2064                   [choose additional languages to build during
2065                   stage1.  Mostly useful for compiler development])],
2066   [case ,${enable_stage1_languages}, in
2067     ,no,|,,)
2068       # Set it to something that will have no effect in the loop below
2069       enable_stage1_languages=c ;;
2070     ,yes,)
2071       enable_stage1_languages=`echo $new_enable_languages | \
2072         sed -e "s/^,//" -e "s/,$//" ` ;;
2073     *,all,*)
2074       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2075         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2076   esac
2077
2078   # Add "good" languages from enable_stage1_languages to stage1_languages,
2079   # while "bad" languages go in missing_languages.  Leave no duplicates.
2080   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2081     case $potential_languages in
2082       *,$i,*)
2083         case $stage1_languages in
2084           *,$i,*) ;;
2085           *) stage1_languages="$stage1_languages$i," ;;
2086         esac ;;
2087       *)
2088         case $missing_languages in
2089           *,$i,*) ;;
2090           *) missing_languages="$missing_languages$i," ;;
2091         esac ;;
2092      esac
2093   done])
2094
2095   # Remove leading/trailing commas that were added for simplicity
2096   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2097   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2098   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2099   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2100
2101   if test "x$missing_languages" != x; then
2102     AC_MSG_ERROR([
2103 The following requested languages could not be built: ${missing_languages}
2104 Supported languages are: ${potential_languages}])
2105   fi
2106   if test "x$new_enable_languages" != "x$enable_languages"; then
2107     echo The following languages will be built: ${new_enable_languages}
2108     enable_languages="$new_enable_languages"
2109   fi
2110
2111   AC_SUBST(stage1_languages)
2112   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2113 fi
2114
2115 # Handle --disable-<component> generically.
2116 for dir in $configdirs $build_configdirs $target_configdirs ; do
2117   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2118   varname=`echo $dirname | sed -e s/+/_/g`
2119   if eval test x\${enable_${varname}} "=" xno ; then
2120     noconfigdirs="$noconfigdirs $dir"
2121   fi
2122 done
2123
2124 # Check for Boehm's garbage collector
2125 AC_ARG_ENABLE(objc-gc,
2126 [AS_HELP_STRING([--enable-objc-gc],
2127                 [enable use of Boehm's garbage collector with the
2128                  GNU Objective-C runtime])])
2129 AC_ARG_WITH([target-bdw-gc],
2130 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2131                 [specify prefix directory for installed bdw-gc package.
2132                  Equivalent to --with-target-bdw-gc-include=PATH/include
2133                  plus --with-target-bdw-gc-lib=PATH/lib])])
2134 AC_ARG_WITH([target-bdw-gc-include],
2135 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2136                 [specify directories for installed bdw-gc include files])])
2137 AC_ARG_WITH([target-bdw-gc-lib],
2138 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2139                 [specify directories for installed bdw-gc library])])
2140
2141 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2142   AC_MSG_CHECKING([for bdw garbage collector])
2143   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2144     dnl no bdw-gw options, assume default locations
2145     AC_MSG_RESULT([using bdw-gc in default locations])
2146   else
2147     dnl bdw-gw options, first error checking, complete checking in libobjc
2148     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2149       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2150     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2151       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2152     else
2153       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2154     fi
2155   fi
2156 esac
2157
2158 # Disable libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2159 case ,${enable_languages}, in
2160   *,c++,*)
2161     # Disable libitm, libsanitizer if we're not building libstdc++
2162     case "${noconfigdirs}" in
2163       *target-libstdc++-v3*)
2164         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2165         ;;
2166       *) ;;
2167     esac
2168     ;;
2169   *)
2170     noconfigdirs="$noconfigdirs target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2171     ;;
2172 esac
2173
2174 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2175 # $build_configdirs and $target_configdirs.
2176 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2177
2178 notsupp=""
2179 for dir in . $skipdirs $noconfigdirs ; do
2180   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2181   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2182     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2183     if test -r $srcdir/$dirname/configure ; then
2184       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2185         true
2186       else
2187         notsupp="$notsupp $dir"
2188       fi
2189     fi
2190   fi
2191   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2192     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2193     if test -r $srcdir/$dirname/configure ; then
2194       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2195         true
2196       else
2197         notsupp="$notsupp $dir"
2198       fi
2199     fi
2200   fi
2201   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2202     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2203     if test -r $srcdir/$dirname/configure ; then
2204       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2205         true
2206       else
2207         notsupp="$notsupp $dir"
2208       fi
2209     fi
2210   fi
2211 done
2212
2213 # Quietly strip out all directories which aren't configurable in this tree.
2214 # This relies on all configurable subdirectories being autoconfiscated, which
2215 # is now the case.
2216 build_configdirs_all="$build_configdirs"
2217 build_configdirs=
2218 for i in ${build_configdirs_all} ; do
2219   j=`echo $i | sed -e s/build-//g`
2220   if test -f ${srcdir}/$j/configure ; then
2221     build_configdirs="${build_configdirs} $i"
2222   fi
2223 done
2224
2225 configdirs_all="$configdirs"
2226 configdirs=
2227 for i in ${configdirs_all} ; do
2228   if test -f ${srcdir}/$i/configure ; then
2229     configdirs="${configdirs} $i"
2230   fi
2231 done
2232
2233 target_configdirs_all="$target_configdirs"
2234 target_configdirs=
2235 for i in ${target_configdirs_all} ; do
2236   j=`echo $i | sed -e s/target-//g`
2237   if test -f ${srcdir}/$j/configure ; then
2238     target_configdirs="${target_configdirs} $i"
2239   fi
2240 done
2241
2242 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2243 # so we have to add it after the preceding checks.
2244 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2245 then
2246   case " $configdirs " in
2247     *" libiberty "*)
2248       # If we can build libiberty, we can also build libiberty-linker-plugin.
2249       configdirs="$configdirs libiberty-linker-plugin"
2250       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2251         --with-libiberty=../libiberty-linker-plugin";;
2252     *)
2253       AC_MSG_ERROR([libiberty missing]);;
2254   esac
2255 fi
2256
2257 # Sometimes we have special requirements for the host libiberty.
2258 extra_host_libiberty_configure_flags=
2259 extra_host_zlib_configure_flags=
2260 case " $configdirs " in
2261   *" lto-plugin "* | *" libcc1 "*)
2262     # When these are to be built as shared libraries, the same applies to
2263     # libiberty.
2264     extra_host_libiberty_configure_flags=--enable-shared
2265     ;;
2266   *" bfd "*)
2267     # When bfd is to be built as a shared library, the same applies to
2268     # zlib.
2269     if test "$enable_shared" = "yes"; then
2270       extra_host_zlib_configure_flags=--enable-host-shared
2271     fi
2272     ;;
2273 esac
2274 AC_SUBST(extra_host_libiberty_configure_flags)
2275 AC_SUBST(extra_host_zlib_configure_flags)
2276
2277 # Produce a warning message for the subdirs we can't configure.
2278 # This isn't especially interesting in the Cygnus tree, but in the individual
2279 # FSF releases, it's important to let people know when their machine isn't
2280 # supported by the one or two programs in a package.
2281
2282 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2283   # If $appdirs is non-empty, at least one of those directories must still
2284   # be configured, or we error out.  (E.g., if the gas release supports a
2285   # specified target in some subdirs but not the gas subdir, we shouldn't
2286   # pretend that all is well.)
2287   if test -n "$appdirs" ; then
2288     for dir in $appdirs ; do
2289       if test -r $dir/Makefile.in ; then
2290         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2291           appdirs=""
2292           break
2293         fi
2294         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2295           appdirs=""
2296           break
2297         fi
2298       fi
2299     done
2300     if test -n "$appdirs" ; then
2301       echo "*** This configuration is not supported by this package." 1>&2
2302       exit 1
2303     fi
2304   fi
2305   # Okay, some application will build, or we don't care to check.  Still
2306   # notify of subdirs not getting built.
2307   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2308   echo "    ${notsupp}" 1>&2
2309   echo "    (Any other directories should still work fine.)" 1>&2
2310 fi
2311
2312 case "$host" in
2313   *msdosdjgpp*)
2314     enable_gdbtk=no ;;
2315 esac
2316
2317 # To find our prefix, in gcc_cv_tool_prefix.
2318 ACX_TOOL_DIRS
2319
2320 copy_dirs=
2321
2322 AC_ARG_WITH([build-sysroot],
2323   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2324                   [use sysroot as the system root during the build])],
2325   [if test x"$withval" != x ; then
2326      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2327    fi],
2328   [SYSROOT_CFLAGS_FOR_TARGET=])
2329 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2330
2331 AC_ARG_WITH([debug-prefix-map],
2332   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2333                   [map A to B, C to D ... in debug information])],
2334   [if test x"$withval" != x; then
2335      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2336      for debug_map in $withval; do
2337        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2338      done
2339    fi],
2340   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2341 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2342
2343 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2344 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2345 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2346 # We want to ensure that TARGET libraries (which we know are built with
2347 # gcc) are built with "-O2 -g", so include those options when setting
2348 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2349 if test "x$CFLAGS_FOR_TARGET" = x; then
2350   if test "x${is_cross_compiler}" = xyes; then
2351     CFLAGS_FOR_TARGET="-g -O2"
2352   else
2353     CFLAGS_FOR_TARGET=$CFLAGS
2354     case " $CFLAGS " in
2355       *" -O2 "*) ;;
2356       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2357     esac
2358     case " $CFLAGS " in
2359       *" -g "* | *" -g3 "*) ;;
2360       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2361     esac
2362   fi
2363 fi
2364 AC_SUBST(CFLAGS_FOR_TARGET)
2365
2366 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2367   if test "x${is_cross_compiler}" = xyes; then
2368     CXXFLAGS_FOR_TARGET="-g -O2"
2369   else
2370     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2371     case " $CXXFLAGS " in
2372       *" -O2 "*) ;;
2373       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2374     esac
2375     case " $CXXFLAGS " in
2376       *" -g "* | *" -g3 "*) ;;
2377       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2378     esac
2379   fi
2380 fi
2381 AC_SUBST(CXXFLAGS_FOR_TARGET)
2382
2383 AC_SUBST(LDFLAGS_FOR_TARGET)
2384
2385 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2386 # the named directory are copied to $(tooldir)/sys-include.
2387 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2388   if test x${is_cross_compiler} = xno ; then
2389     echo 1>&2 '***' --with-headers is only supported when cross compiling
2390     exit 1
2391   fi
2392   if test x"${with_headers}" != xyes ; then
2393     x=${gcc_cv_tool_prefix}
2394     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2395   fi
2396 fi
2397
2398 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2399 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2400 # are permitted.
2401 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2402   if test x${is_cross_compiler} = xno ; then
2403     echo 1>&2 '***' --with-libs is only supported when cross compiling
2404     exit 1
2405   fi
2406   if test x"${with_libs}" != xyes ; then
2407     # Copy the libraries in reverse order, so that files in the first named
2408     # library override files in subsequent libraries.
2409     x=${gcc_cv_tool_prefix}
2410     for l in ${with_libs}; do
2411       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2412     done
2413   fi
2414 fi
2415
2416 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2417 #
2418 # This is done by determining whether or not the appropriate directory
2419 # is available, and by checking whether or not specific configurations
2420 # have requested that this magic not happen.
2421 #
2422 # The command line options always override the explicit settings in
2423 # configure.ac, and the settings in configure.ac override this magic.
2424 #
2425 # If the default for a toolchain is to use GNU as and ld, and you don't
2426 # want to do that, then you should use the --without-gnu-as and
2427 # --without-gnu-ld options for the configure script.  Similarly, if
2428 # the default is to use the included zlib and you don't want to do that,
2429 # you should use the --with-system-zlib option for the configure script.
2430
2431 if test x${use_gnu_as} = x &&
2432    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2433   with_gnu_as=yes
2434   extra_host_args="$extra_host_args --with-gnu-as"
2435 fi
2436
2437 if test x${use_gnu_ld} = x &&
2438    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2439   with_gnu_ld=yes
2440   extra_host_args="$extra_host_args --with-gnu-ld"
2441 fi
2442
2443 if test x${use_included_zlib} = x &&
2444    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2445   :
2446 else
2447   with_system_zlib=yes
2448   extra_host_args="$extra_host_args --with-system-zlib"
2449 fi
2450
2451 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2452 # can detect this case.
2453
2454 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2455   with_newlib=yes
2456   extra_host_args="$extra_host_args --with-newlib"
2457 fi
2458
2459 # Handle ${copy_dirs}
2460 set fnord ${copy_dirs}
2461 shift
2462 while test $# != 0 ; do
2463   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2464     :
2465   else
2466     echo Copying $1 to $2
2467
2468     # Use the install script to create the directory and all required
2469     # parent directories.
2470     if test -d $2 ; then
2471       :
2472     else
2473       echo >config.temp
2474       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2475     fi
2476
2477     # Copy the directory, assuming we have tar.
2478     # FIXME: Should we use B in the second tar?  Not all systems support it.
2479     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2480
2481     # It is the responsibility of the user to correctly adjust all
2482     # symlinks.  If somebody can figure out how to handle them correctly
2483     # here, feel free to add the code.
2484
2485     echo $1 > $2/COPIED
2486   fi
2487   shift; shift
2488 done
2489
2490 # Determine a target-dependent exec_prefix that the installed
2491 # gcc will search in.  Keep this list sorted by triplet, with
2492 # the *-*-osname triplets last.
2493 md_exec_prefix=
2494 case "${target}" in
2495   i[[34567]]86-pc-msdosdjgpp*)
2496     md_exec_prefix=/dev/env/DJDIR/bin
2497     ;;
2498   *-*-hpux* | \
2499   *-*-nto-qnx* | \
2500   *-*-solaris2*)
2501     md_exec_prefix=/usr/ccs/bin
2502     ;;
2503 esac
2504
2505 extra_arflags_for_target=
2506 extra_nmflags_for_target=
2507 extra_ranlibflags_for_target=
2508 target_makefile_frag=/dev/null
2509 case "${target}" in
2510   spu-*-*)
2511     target_makefile_frag="config/mt-spu"
2512     ;;
2513   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2514     target_makefile_frag="config/mt-sde"
2515     ;;
2516   mipsisa*-*-elfoabi*)
2517     target_makefile_frag="config/mt-mips-elfoabi"
2518     ;;
2519   mips*-*-*linux* | mips*-*-gnu*)
2520     target_makefile_frag="config/mt-mips-gnu"
2521     ;;
2522   nios2-*-elf*)
2523     target_makefile_frag="config/mt-nios2-elf"
2524     ;;
2525   *-*-linux-android*)
2526     target_makefile_frag="config/mt-android"
2527     ;;
2528   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2529     target_makefile_frag="config/mt-gnu"
2530     ;;
2531   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2532     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2533     # commands to handle both 32-bit and 64-bit objects.  These flags are
2534     # harmless if we're using GNU nm or ar.
2535     extra_arflags_for_target=" -X32_64"
2536     extra_nmflags_for_target=" -B -X32_64"
2537     ;;
2538 esac
2539
2540 alphaieee_frag=/dev/null
2541 case $target in
2542   alpha*-*-*)
2543     # This just makes sure to use the -mieee option to build target libs.
2544     # This should probably be set individually by each library.
2545     alphaieee_frag="config/mt-alphaieee"
2546     ;;
2547 esac
2548
2549 # If --enable-target-optspace always use -Os instead of -O2 to build
2550 # the target libraries, similarly if it is not specified, use -Os
2551 # on selected platforms.
2552 ospace_frag=/dev/null
2553 case "${enable_target_optspace}:${target}" in
2554   yes:*)
2555     ospace_frag="config/mt-ospace"
2556     ;;
2557   :d30v-*)
2558     ospace_frag="config/mt-d30v"
2559     ;;
2560   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2561     ospace_frag="config/mt-ospace"
2562     ;;
2563   no:* | :*)
2564     ;;
2565   *)
2566     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2567     ;;
2568 esac
2569
2570 # Some systems (e.g., one of the i386-aix systems the gas testers are
2571 # using) don't handle "\$" correctly, so don't use it here.
2572 tooldir='${exec_prefix}'/${target_noncanonical}
2573 build_tooldir=${tooldir}
2574
2575 # Create a .gdbinit file which runs the one in srcdir
2576 # and tells GDB to look there for source files.
2577
2578 if test -r ${srcdir}/.gdbinit ; then
2579   case ${srcdir} in
2580     .) ;;
2581     *) cat > ./.gdbinit <<EOF
2582 # ${NO_EDIT}
2583 dir ${srcdir}
2584 dir .
2585 source ${srcdir}/.gdbinit
2586 EOF
2587     ;;
2588   esac
2589 fi
2590
2591 # Make sure that the compiler is able to generate an executable.  If it
2592 # can't, we are probably in trouble.  We don't care whether we can run the
2593 # executable--we might be using a cross compiler--we only care whether it
2594 # can be created.  At this point the main configure script has set CC.
2595 we_are_ok=no
2596 echo "int main () { return 0; }" > conftest.c
2597 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2598 if test $? = 0 ; then
2599   if test -s conftest || test -s conftest.exe ; then
2600     we_are_ok=yes
2601   fi
2602 fi
2603 case $we_are_ok in
2604   no)
2605     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2606     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2607     rm -f conftest*
2608     exit 1
2609     ;;
2610 esac
2611 rm -f conftest*
2612
2613 # Decide which environment variable is used to find dynamic libraries.
2614 case "${host}" in
2615   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2616   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2617   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2618   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2619 esac
2620
2621 # On systems where the dynamic library environment variable is PATH,
2622 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2623 # built executables to PATH.
2624 if test "$RPATH_ENVVAR" = PATH; then
2625   GCC_SHLIB_SUBDIR=/shlib
2626 else
2627   GCC_SHLIB_SUBDIR=
2628 fi
2629
2630 # Adjust the toplevel makefile according to whether bootstrap was selected.
2631 case $enable_bootstrap in
2632   yes)
2633     bootstrap_suffix=bootstrap
2634     BUILD_CONFIG=bootstrap-debug
2635     ;;
2636   no)
2637     bootstrap_suffix=no-bootstrap
2638     BUILD_CONFIG=
2639     ;;
2640 esac
2641
2642 AC_MSG_CHECKING(for default BUILD_CONFIG)
2643
2644 AC_ARG_WITH([build-config],
2645   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2646                   [use config/NAME.mk build configuration])],
2647   [case $with_build_config in
2648    yes) with_build_config= ;;
2649    no) with_build_config= BUILD_CONFIG= ;;
2650    esac])
2651
2652 if test "x${with_build_config}" != x; then
2653   BUILD_CONFIG=$with_build_config
2654 else
2655   case $BUILD_CONFIG in
2656   bootstrap-debug)
2657     if echo "int f (void) { return 0; }" > conftest.c &&
2658        ${CC} -c conftest.c &&
2659        mv conftest.o conftest.o.g0 &&
2660        ${CC} -c -g conftest.c &&
2661        mv conftest.o conftest.o.g &&
2662        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2663       :
2664     else
2665       BUILD_CONFIG=
2666     fi
2667     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2668     ;;
2669   esac
2670 fi
2671 AC_MSG_RESULT($BUILD_CONFIG)
2672 AC_SUBST(BUILD_CONFIG)
2673
2674 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2675 AC_MSG_CHECKING([for --enable-vtable-verify])
2676 AC_ARG_ENABLE(vtable-verify,
2677 [AS_HELP_STRING([--enable-vtable-verify],
2678                 [Enable vtable verification feature])],
2679 [case "$enableval" in
2680  yes) enable_vtable_verify=yes ;;
2681  no)  enable_vtable_verify=no ;;
2682  *)   enable_vtable_verify=no;;
2683  esac],
2684 [enable_vtable_verify=no])
2685 AC_MSG_RESULT($enable_vtable_verify)
2686
2687 # Record target_configdirs and the configure arguments for target and
2688 # build configuration in Makefile.
2689 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2690 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2691 bootstrap_fixincludes=no
2692
2693 # If we are building libgomp, bootstrap it.
2694 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2695   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2696 fi
2697
2698 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2699 # or bootstrap-ubsan, bootstrap it.
2700 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2701   case "$BUILD_CONFIG" in
2702     *bootstrap-asan* | *bootstrap-ubsan* )
2703       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2704       bootstrap_fixincludes=yes
2705       ;;
2706   esac
2707 fi
2708
2709 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2710 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2711    test "$enable_vtable_verify" != no; then
2712   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2713 fi
2714
2715 # Determine whether gdb needs tk/tcl or not.
2716 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2717 # and in that case we want gdb to be built without tk.  Ugh!
2718 # In fact I believe gdb is the *only* package directly dependent on tk,
2719 # so we should be able to put the 'maybe's in unconditionally and
2720 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2721 # 100% sure that that's safe though.
2722
2723 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2724 case "$enable_gdbtk" in
2725   no)
2726     GDB_TK="" ;;
2727   yes)
2728     GDB_TK="${gdb_tk}" ;;
2729   *)
2730     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2731     # distro.  Eventually someone will fix this and move Insight, nee
2732     # gdbtk to a separate directory.
2733     if test -d ${srcdir}/gdb/gdbtk ; then
2734       GDB_TK="${gdb_tk}"
2735     else
2736       GDB_TK=""
2737     fi
2738     ;;
2739 esac
2740 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2741 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2742
2743 # Strip out unwanted targets.
2744
2745 # While at that, we remove Makefiles if we were started for recursive
2746 # configuration, so that the top-level Makefile reconfigures them,
2747 # like we used to do when configure itself was recursive.
2748
2749 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2750 # but now we're fixing up the Makefile ourselves with the additional
2751 # commands passed to AC_CONFIG_FILES.  Use separate variables
2752 # extrasub-{build,host,target} not because there is any reason to split
2753 # the substitutions up that way, but only to remain below the limit of
2754 # 99 commands in a script, for HP-UX sed.
2755
2756 # Do not nest @if/@endif or @unless/@endunless pairs, because
2757 # configure will not warn you at all.
2758
2759 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2760   yes:yes:*\ gold\ *:*,c++,*) ;;
2761   yes:yes:*\ gold\ *:*)
2762     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2763     ;;
2764 esac
2765
2766 extrasub_build=
2767 for module in ${build_configdirs} ; do
2768   if test -z "${no_recursion}" \
2769      && test -f ${build_subdir}/${module}/Makefile; then
2770     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2771     rm -f ${build_subdir}/${module}/Makefile
2772   fi
2773   extrasub_build="$extrasub_build
2774 /^@if build-$module\$/d
2775 /^@endif build-$module\$/d
2776 /^@unless build-$module\$/,/^@endunless build-$module\$/d
2777 /^@if build-$module-$bootstrap_suffix\$/d
2778 /^@endif build-$module-$bootstrap_suffix\$/d
2779 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
2780 done
2781 extrasub_host=
2782 for module in ${configdirs} ; do
2783   if test -z "${no_recursion}"; then
2784     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2785       if test -f ${file}; then
2786         echo 1>&2 "*** removing ${file} to force reconfigure"
2787         rm -f ${file}
2788       fi
2789     done
2790   fi
2791   case ${module},${bootstrap_fixincludes} in
2792     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2793     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2794   esac
2795   extrasub_host="$extrasub_host
2796 /^@if $module\$/d
2797 /^@endif $module\$/d
2798 /^@unless $module\$/,/^@endunless $module\$/d
2799 /^@if $module-$host_bootstrap_suffix\$/d
2800 /^@endif $module-$host_bootstrap_suffix\$/d
2801 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
2802 done
2803 extrasub_target=
2804 for module in ${target_configdirs} ; do
2805   if test -z "${no_recursion}" \
2806      && test -f ${target_subdir}/${module}/Makefile; then
2807     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2808     rm -f ${target_subdir}/${module}/Makefile
2809   fi
2810
2811   # We only bootstrap target libraries listed in bootstrap_target_libs.
2812   case $bootstrap_target_libs in
2813     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2814     *) target_bootstrap_suffix=no-bootstrap ;;
2815   esac
2816
2817   extrasub_target="$extrasub_target
2818 /^@if target-$module\$/d
2819 /^@endif target-$module\$/d
2820 /^@unless target-$module\$/,/^@endunless target-$module\$/d
2821 /^@if target-$module-$target_bootstrap_suffix\$/d
2822 /^@endif target-$module-$target_bootstrap_suffix\$/d
2823 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
2824 done
2825
2826 # Do the final fixup along with target modules.
2827 extrasub_target="$extrasub_target
2828 /^@if /,/^@endif /d
2829 /^@unless /d
2830 /^@endunless /d"
2831
2832 # Create the serialization dependencies.  This uses a temporary file.
2833
2834 AC_ARG_ENABLE([serial-configure],
2835 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
2836                 [force sequential configuration of
2837                  sub-packages for the host, target or build
2838                  machine, or all sub-packages])])
2839
2840 case ${enable_serial_configure} in
2841   yes)
2842     enable_serial_build_configure=yes
2843     enable_serial_host_configure=yes
2844     enable_serial_target_configure=yes
2845     ;;
2846 esac
2847
2848 # These force 'configure's to be done one at a time, to avoid problems
2849 # with contention over a shared config.cache.
2850 rm -f serdep.tmp
2851 echo '# serdep.tmp' > serdep.tmp
2852 olditem=
2853 test "x${enable_serial_build_configure}" = xyes &&
2854 for item in ${build_configdirs} ; do
2855   case ${olditem} in
2856     "") ;;
2857     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
2858   esac
2859   olditem=${item}
2860 done
2861 olditem=
2862 test "x${enable_serial_host_configure}" = xyes &&
2863 for item in ${configdirs} ; do
2864   case ${olditem} in
2865     "") ;;
2866     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
2867   esac
2868   olditem=${item}
2869 done
2870 olditem=
2871 test "x${enable_serial_target_configure}" = xyes &&
2872 for item in ${target_configdirs} ; do
2873   case ${olditem} in
2874     "") ;;
2875     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
2876   esac
2877   olditem=${item}
2878 done
2879 serialization_dependencies=serdep.tmp
2880 AC_SUBST_FILE(serialization_dependencies)
2881
2882 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
2883 # target, nonopt, and variable assignments.  These are the ones we
2884 # might not want to pass down to subconfigures.  The exception being
2885 # --cache-file=/dev/null, which is used to turn off the use of cache
2886 # files altogether, and which should be passed on to subconfigures.
2887 # Also strip program-prefix, program-suffix, and program-transform-name,
2888 # so that we can pass down a consistent program-transform-name.
2889 baseargs=
2890 tbaseargs=
2891 keep_next=no
2892 skip_next=no
2893 eval "set -- $ac_configure_args"
2894 for ac_arg
2895 do
2896   if test X"$skip_next" = X"yes"; then
2897     skip_next=no
2898     continue
2899   fi
2900   if test X"$keep_next" = X"yes"; then
2901     case $ac_arg in
2902       *\'*)
2903         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2904     esac
2905     baseargs="$baseargs '$ac_arg'"
2906     tbaseargs="$tbaseargs '$ac_arg'"
2907     keep_next=no
2908     continue
2909   fi
2910
2911   # Handle separated arguments.  Based on the logic generated by
2912   # autoconf 2.59.
2913   case $ac_arg in
2914     *=* | --config-cache | -C | -disable-* | --disable-* \
2915       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
2916       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
2917       | -with-* | --with-* | -without-* | --without-* | --x)
2918       separate_arg=no
2919       ;;
2920     -*)
2921       separate_arg=yes
2922       ;;
2923     *)
2924       separate_arg=no
2925       ;;
2926   esac
2927
2928   skip_targ=no
2929   case $ac_arg in
2930 changequote(,)
2931   --with-* | --without-*)
2932     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
2933
2934     case $libopt in
2935     *[-_]include)
2936       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
2937       ;;
2938     *[-_]lib)
2939       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
2940       ;;
2941     *)
2942       lib=$libopt
2943       ;;
2944     esac
2945 changequote([,])
2946
2947     case $lib in
2948     mpc | mpfr | gmp | isl)
2949       # If we're processing --with-$lib, --with-$lib-include or
2950       # --with-$lib-lib, for one of the libs above, and target is
2951       # different from host, don't pass the current argument to any
2952       # target library's configure.
2953       if test x$is_cross_compiler = xyes; then
2954         skip_targ=yes
2955       fi
2956       ;;
2957     esac
2958     ;;
2959   esac
2960
2961   case "$ac_arg" in
2962     --cache-file=/dev/null | \
2963     -cache-file=/dev/null )
2964       # Handled here to avoid the test to skip args below.
2965       baseargs="$baseargs '$ac_arg'"
2966       tbaseargs="$tbaseargs '$ac_arg'"
2967       # Assert: $separate_arg should always be no.
2968       keep_next=$separate_arg
2969       ;;
2970     --no*)
2971       continue
2972       ;;
2973     --c* | \
2974     --sr* | \
2975     --ho* | \
2976     --bu* | \
2977     --t* | \
2978     --program-* | \
2979     -cache_file* | \
2980     -srcdir* | \
2981     -host* | \
2982     -build* | \
2983     -target* | \
2984     -program-prefix* | \
2985     -program-suffix* | \
2986     -program-transform-name* )
2987       skip_next=$separate_arg
2988       continue
2989       ;;
2990     -*)
2991       # An option.  Add it.
2992       case $ac_arg in
2993         *\'*)
2994           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2995       esac
2996       baseargs="$baseargs '$ac_arg'"
2997       if test X"$skip_targ" = Xno; then
2998         tbaseargs="$tbaseargs '$ac_arg'"
2999       fi
3000       keep_next=$separate_arg
3001       ;;
3002     *)
3003       # Either a variable assignment, or a nonopt (triplet).  Don't
3004       # pass it down; let the Makefile handle this.
3005       continue
3006       ;;
3007   esac
3008 done
3009 # Remove the initial space we just introduced and, as these will be
3010 # expanded by make, quote '$'.
3011 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3012
3013 # Add in --program-transform-name, after --program-prefix and
3014 # --program-suffix have been applied to it.  Autoconf has already
3015 # doubled dollar signs and backslashes in program_transform_name; we want
3016 # the backslashes un-doubled, and then the entire thing wrapped in single
3017 # quotes, because this will be expanded first by make and then by the shell.
3018 # Also, because we want to override the logic in subdir configure scripts to
3019 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3020 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3021 ${program_transform_name}
3022 EOF_SED
3023 gcc_transform_name=`cat conftestsed.out`
3024 rm -f conftestsed.out
3025 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3026 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3027 if test "$silent" = yes; then
3028   baseargs="$baseargs --silent"
3029   tbaseargs="$tbaseargs --silent"
3030 fi
3031 baseargs="$baseargs --disable-option-checking"
3032 tbaseargs="$tbaseargs --disable-option-checking"
3033
3034 # Record and document user additions to sub configure arguments.
3035 AC_ARG_VAR([build_configargs],
3036            [additional configure arguments for build directories])
3037 AC_ARG_VAR([host_configargs],
3038            [additional configure arguments for host directories])
3039 AC_ARG_VAR([target_configargs],
3040            [additional configure arguments for target directories])
3041
3042 # For the build-side libraries, we just need to pretend we're native,
3043 # and not use the same cache file.  Multilibs are neither needed nor
3044 # desired.  We can't even use the same cache file for all build-side
3045 # libraries, as they're compiled differently; some with C, some with
3046 # C++ or with different feature-enabling options.
3047 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3048
3049 # For host modules, accept cache file option, or specification as blank.
3050 case "${cache_file}" in
3051 "") # empty
3052   cache_file_option="" ;;
3053 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3054   cache_file_option="--cache-file=${cache_file}" ;;
3055 *) # relative path
3056   cache_file_option="--cache-file=../${cache_file}" ;;
3057 esac
3058
3059 # Host dirs don't like to share a cache file either, horribly enough.
3060 # This seems to be due to autoconf 2.5x stupidity.
3061 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3062
3063 target_configargs="$target_configargs ${tbaseargs}"
3064
3065 # Passing a --with-cross-host argument lets the target libraries know
3066 # whether they are being built with a cross-compiler or being built
3067 # native.  However, it would be better to use other mechanisms to make the
3068 # sorts of decisions they want to make on this basis.  Please consider
3069 # this option to be deprecated.  FIXME.
3070 if test x${is_cross_compiler} = xyes ; then
3071   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3072 fi
3073
3074 # Special user-friendly check for native x86_64-linux build, if
3075 # multilib is not explicitly enabled.
3076 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3077   x86_64-*linux*:yes:$build:$build:)
3078     # Make sure we have a development environment that handles 32-bit
3079     dev64=no
3080     echo "int main () { return 0; }" > conftest.c
3081     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3082     if test $? = 0 ; then
3083       if test -s conftest || test -s conftest.exe ; then
3084         dev64=yes
3085       fi
3086     fi
3087     rm -f conftest*
3088     if test x${dev64} != xyes ; then
3089       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.])
3090     fi
3091     ;;
3092 esac
3093
3094 # Default to --enable-multilib.
3095 if test x${enable_multilib} = x ; then
3096   target_configargs="--enable-multilib ${target_configargs}"
3097 fi
3098
3099 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3100 # changed from the earlier setting of with_newlib.
3101 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3102   target_configargs="--with-newlib ${target_configargs}"
3103 fi
3104
3105 # Different target subdirs use different values of certain variables
3106 # (notably CXX).  Worse, multilibs use *lots* of different values.
3107 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3108 # it doesn't automatically accept command-line overrides of them.
3109 # This means it's not safe for target subdirs to share a cache file,
3110 # which is disgusting, but there you have it.  Hopefully this can be
3111 # fixed in future.  It's still worthwhile to use a cache file for each
3112 # directory.  I think.
3113
3114 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3115 # We need to pass --target, as newer autoconf's requires consistency
3116 # for target_alias and gcc doesn't manage it consistently.
3117 target_configargs="--cache-file=./config.cache ${target_configargs}"
3118
3119 FLAGS_FOR_TARGET=
3120 case " $target_configdirs " in
3121  *" newlib "*)
3122   case " $target_configargs " in
3123   *" --with-newlib "*)
3124    case "$target" in
3125     *-cygwin*)
3126       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3127       ;;
3128    esac
3129
3130    # If we're not building GCC, don't discard standard headers.
3131    if test -d ${srcdir}/gcc; then
3132      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3133
3134      if test "${build}" != "${host}"; then
3135        # On Canadian crosses, CC_FOR_TARGET will have already been set
3136        # by `configure', so we won't have an opportunity to add -Bgcc/
3137        # to it.  This is right: we don't want to search that directory
3138        # for binaries, but we want the header files in there, so add
3139        # them explicitly.
3140        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3141
3142        # Someone might think of using the pre-installed headers on
3143        # Canadian crosses, in case the installed compiler is not fully
3144        # compatible with the compiler being built.  In this case, it
3145        # would be better to flag an error than risking having
3146        # incompatible object files being constructed.  We can't
3147        # guarantee that an error will be flagged, but let's hope the
3148        # compiler will do it, when presented with incompatible header
3149        # files.
3150      fi
3151    fi
3152
3153    case "${target}-${is_cross_compiler}" in
3154    i[[3456789]]86-*-linux*-no)
3155       # Here host == target, so we don't need to build gcc,
3156       # so we don't want to discard standard headers.
3157       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3158       ;;
3159    *)
3160       # If we're building newlib, use its generic headers last, but search
3161       # for any libc-related directories first (so make it the last -B
3162       # switch).
3163       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3164
3165       # If we're building libgloss, find the startup file, simulator library
3166       # and linker script.
3167       case " $target_configdirs " in
3168         *" libgloss "*)
3169         # Look for startup file, simulator library and maybe linker script.
3170         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3171         # Look for libnosys.a in case the target needs it.
3172         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3173         # Most targets have the linker script in the source directory.
3174         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3175         ;;
3176       esac
3177       ;;
3178    esac
3179    ;;
3180   esac
3181   ;;
3182 esac
3183
3184 case "$target" in
3185   x86_64-*mingw* | *-w64-mingw*)
3186   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3187   # however, use a symlink named 'mingw' in ${prefix} .
3188     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3189     ;;
3190   *-mingw*)
3191   # MinGW can't be handled as Cygwin above since it does not use newlib.
3192     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3193     ;;
3194 esac
3195
3196 # Allow the user to override the flags for
3197 # our build compiler if desired.
3198 if test x"${build}" = x"${host}" ; then
3199   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3200   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3201   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3202 fi
3203
3204 # On Canadian crosses, we'll be searching the right directories for
3205 # the previously-installed cross compiler, so don't bother to add
3206 # flags for directories within the install tree of the compiler
3207 # being built; programs in there won't even run.
3208 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3209   # Search for pre-installed headers if nothing else fits.
3210   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3211 fi
3212
3213 if test "x${use_gnu_ld}" = x &&
3214    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3215   # Arrange for us to find uninstalled linker scripts.
3216   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3217 fi
3218
3219 # Search for other target-specific linker scripts and such.
3220 case "${target}" in
3221   mep*)
3222     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3223     ;;
3224 esac
3225
3226 # Makefile fragments.
3227 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3228 do
3229   eval fragval=\$$frag
3230   if test $fragval != /dev/null; then
3231     eval $frag=${srcdir}/$fragval
3232   fi
3233 done
3234 AC_SUBST_FILE(host_makefile_frag)
3235 AC_SUBST_FILE(target_makefile_frag)
3236 AC_SUBST_FILE(alphaieee_frag)
3237 AC_SUBST_FILE(ospace_frag)
3238
3239 # Miscellanea: directories, flags, etc.
3240 AC_SUBST(RPATH_ENVVAR)
3241 AC_SUBST(GCC_SHLIB_SUBDIR)
3242 AC_SUBST(tooldir)
3243 AC_SUBST(build_tooldir)
3244 AC_SUBST(CONFIGURE_GDB_TK)
3245 AC_SUBST(GDB_TK)
3246 AC_SUBST(INSTALL_GDB_TK)
3247
3248 # Build module lists & subconfigure args.
3249 AC_SUBST(build_configargs)
3250 AC_SUBST(build_configdirs)
3251
3252 # Host module lists & subconfigure args.
3253 AC_SUBST(host_configargs)
3254 AC_SUBST(configdirs)
3255 AC_SUBST(target_configdirs)
3256
3257 # Target module lists & subconfigure args.
3258 AC_SUBST(target_configargs)
3259
3260
3261 # Build tools.
3262 AC_SUBST(AR_FOR_BUILD)
3263 AC_SUBST(AS_FOR_BUILD)
3264 AC_SUBST(CC_FOR_BUILD)
3265 AC_SUBST(CFLAGS_FOR_BUILD)
3266 AC_SUBST(CXXFLAGS_FOR_BUILD)
3267 AC_SUBST(CXX_FOR_BUILD)
3268 AC_SUBST(DLLTOOL_FOR_BUILD)
3269 AC_SUBST(GFORTRAN_FOR_BUILD)
3270 AC_SUBST(GOC_FOR_BUILD)
3271 AC_SUBST(GDC_FOR_BUILD)
3272 AC_SUBST(LDFLAGS_FOR_BUILD)
3273 AC_SUBST(LD_FOR_BUILD)
3274 AC_SUBST(NM_FOR_BUILD)
3275 AC_SUBST(RANLIB_FOR_BUILD)
3276 AC_SUBST(WINDMC_FOR_BUILD)
3277 AC_SUBST(WINDRES_FOR_BUILD)
3278
3279 # Generate default definitions for YACC, M4, LEX and other programs that run
3280 # on the build machine.  These are used if the Makefile can't locate these
3281 # programs in objdir.
3282 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3283
3284 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3285 case " $build_configdirs " in
3286   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3287 esac
3288
3289 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3290 case " $build_configdirs " in
3291   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3292 esac
3293
3294 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3295 case " $build_configdirs " in
3296   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3297 esac
3298
3299 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3300 case " $build_configdirs " in
3301   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3302   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3303 esac
3304
3305 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3306 case " $build_configdirs " in
3307   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3308 esac
3309
3310 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3311 case " $build_configdirs " in
3312   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3313   *)
3314 changequote(,)
3315     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3316     # higher, else we use the "missing" dummy.
3317     if ${MAKEINFO} --version \
3318        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3319       :
3320     else
3321       MAKEINFO="$MISSING makeinfo"
3322     fi
3323     ;;
3324 changequote([,])
3325 esac
3326
3327 # FIXME: expect and dejagnu may become build tools?
3328
3329 AC_CHECK_PROGS(EXPECT, expect, expect)
3330 case " $configdirs " in
3331   *" expect "*)
3332     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3333     ;;
3334 esac
3335
3336 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3337 case " $configdirs " in
3338   *" dejagnu "*)
3339     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3340     ;;
3341 esac
3342
3343
3344 # Host tools.
3345 NCN_STRICT_CHECK_TOOLS(AR, ar)
3346 NCN_STRICT_CHECK_TOOLS(AS, as)
3347 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3348 NCN_STRICT_CHECK_TOOLS(LD, ld)
3349 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3350 NCN_STRICT_CHECK_TOOLS(NM, nm)
3351 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3352 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3353 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3354 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3355 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3356 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3357 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3358 AC_SUBST(CC)
3359 AC_SUBST(CXX)
3360 AC_SUBST(CFLAGS)
3361 AC_SUBST(CXXFLAGS)
3362
3363 # Target tools.
3364 AC_ARG_WITH([build-time-tools],
3365   [AS_HELP_STRING([--with-build-time-tools=PATH],
3366                   [use given path to find target tools during the build])],
3367   [case x"$withval" in
3368      x/*) ;;
3369      *)
3370        with_build_time_tools=
3371        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3372        ;;
3373    esac],
3374   [with_build_time_tools=])
3375
3376 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3377 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3378 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3379 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3380 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3381 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3382
3383 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3384 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3385 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3386 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3387 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3388 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3389 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3390 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3391 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3392 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3393 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3394 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3395 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3396
3397 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3398
3399 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3400 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3401 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3402 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3403 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3404                 [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],
3405                 c++)
3406 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3407                 [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],
3408                 c++)
3409 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3410 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3411 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3412                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3413 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3414                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3415 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3416                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3417 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3418 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3419 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3420 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3421 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3422 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3423 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3424 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3425 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3426 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3427
3428 AC_SUBST(FLAGS_FOR_TARGET)
3429 AC_SUBST(RAW_CXX_FOR_TARGET)
3430
3431 # Certain tools may need extra flags.
3432 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3433 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3434 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3435
3436 # When building target libraries, except in a Canadian cross, we use
3437 # the same toolchain as the compiler we just built.
3438 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3439 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3440 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3441 if test $host = $build; then
3442   case " $configdirs " in
3443     *" gcc "*)
3444       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3445       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3446       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3447       ;;
3448   esac
3449 fi
3450
3451 AC_SUBST(COMPILER_AS_FOR_TARGET)
3452 AC_SUBST(COMPILER_LD_FOR_TARGET)
3453 AC_SUBST(COMPILER_NM_FOR_TARGET)
3454
3455 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3456 AC_ARG_ENABLE(maintainer-mode,
3457 [AS_HELP_STRING([--enable-maintainer-mode],
3458                 [enable make rules and dependencies not useful
3459                  (and sometimes confusing) to the casual installer])],
3460       USE_MAINTAINER_MODE=$enableval,
3461       USE_MAINTAINER_MODE=no)
3462 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3463 AC_SUBST(MAINTAINER_MODE_TRUE)
3464 AC_SUBST(MAINTAINER_MODE_FALSE)
3465 if test "$USE_MAINTAINER_MODE" = yes; then
3466   MAINTAINER_MODE_TRUE=
3467   MAINTAINER_MODE_FALSE='#'
3468 else
3469   MAINTAINER_MODE_TRUE='#'
3470   MAINTAINER_MODE_FALSE=
3471 fi
3472 MAINT=$MAINTAINER_MODE_TRUE
3473 AC_SUBST(MAINT)dnl
3474
3475 # ---------------------
3476 # GCC bootstrap support
3477 # ---------------------
3478
3479 # Stage specific cflags for build.
3480 stage1_cflags="-g"
3481 case $build in
3482   vax-*-*)
3483     case ${GCC} in
3484       yes) stage1_cflags="-g -Wa,-J" ;;
3485       *) stage1_cflags="-g -J" ;;
3486     esac ;;
3487 esac
3488
3489 AC_SUBST(stage1_cflags)
3490
3491 # Enable --enable-checking in stage1 of the compiler.
3492 AC_ARG_ENABLE(stage1-checking,
3493 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3494                 [choose additional checking for stage1 of the compiler])],
3495 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3496 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3497   # For --disable-checking or implicit --enable-checking=release, avoid
3498   # setting --enable-checking=gc in the default stage1 checking for LTO
3499   # bootstraps.  See PR62077.
3500   case $BUILD_CONFIG in
3501     *lto*)
3502       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3503     *)
3504       stage1_checking=--enable-checking=yes,types;;
3505   esac
3506   if test "x$enable_checking" = x && \
3507      test -d ${srcdir}/gcc && \
3508      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3509     stage1_checking=--enable-checking=yes,types,extra
3510   fi
3511 else
3512   stage1_checking=--enable-checking=$enable_checking,types
3513 fi])
3514 AC_SUBST(stage1_checking)
3515
3516 # Enable -Werror in bootstrap stage2 and later.
3517 AC_ARG_ENABLE(werror,
3518 [AS_HELP_STRING([--enable-werror],
3519                 [enable -Werror in bootstrap stage2 and later])],
3520 [
3521 case ${enable_werror} in
3522   yes) stage2_werror_flag="--enable-werror-always" ;;
3523   *) stage2_werror_flag="" ;;
3524 esac
3525 ],
3526 [
3527 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3528   case $BUILD_CONFIG in
3529   bootstrap-debug)
3530       stage2_werror_flag="--enable-werror-always" ;;
3531   "")
3532       stage2_werror_flag="--enable-werror-always" ;;
3533   esac
3534 fi
3535 ])
3536
3537 AC_SUBST(stage2_werror_flag)
3538
3539 # Specify what files to not compare during bootstrap.
3540
3541 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3542 case "$target" in
3543   hppa*64*-*-hpux*) ;;
3544   hppa*-*-hpux*) compare_exclusions="gcc/cc*-checksum\$(objext) | */libgcc/lib2funcs* | gcc/ada/*tools/* | gcc/function-tests.o" ;;
3545   powerpc*-ibm-aix*) compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/* | *libgomp*\$(objext)" ;;
3546 esac
3547 AC_SUBST(compare_exclusions)
3548
3549 AC_CONFIG_FILES([Makefile],
3550   [sed "$extrasub_build" Makefile |
3551    sed "$extrasub_host" |
3552    sed "$extrasub_target" > mf$$
3553    mv -f mf$$ Makefile],
3554   [extrasub_build="$extrasub_build"
3555    extrasub_host="$extrasub_host"
3556    extrasub_target="$extrasub_target"])
3557 AC_OUTPUT