configure.ac

   1 #   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2 #   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012,
   3 #   2014, 2015, 2016 Free Software Foundation, Inc.
   4 #
   5 # This file is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  18
  19 ##############################################################################
  20 ### WARNING: this file contains embedded tabs.  Do not run untabify on this file.
  21
  22 m4_include(config/acx.m4)
  23 m4_include(config/override.m4)
  24 m4_include(config/proginstall.m4)
  25 m4_include(config/elf.m4)
  26 m4_include([libtool.m4])
  27 m4_include([ltoptions.m4])
  28 m4_include([ltsugar.m4])
  29 m4_include([ltversion.m4])
  30 m4_include([lt~obsolete.m4])
  31 m4_include([config/isl.m4])
  32
  33 AC_INIT(move-if-change)
  34 AC_DISABLE_OPTION_CHECKING
  35
  36 progname=$0
  37 # if PWD already has a value, it is probably wrong.
  38 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  39
  40 # Export original configure arguments for use by sub-configures.
  41 # Quote arguments with shell meta charatcers.
  42 TOPLEVEL_CONFIGURE_ARGUMENTS=
  43 set -- "$progname" "$@"
  44 for ac_arg
  45 do
  46   case "$ac_arg" in
  47   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  48     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  49     # if the argument is of the form -foo=baz, quote the baz part only
  50     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  51   *) ;;
  52   esac
  53   # Add the quoted argument to the list.
  54   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  55 done
  56 if test "$silent" = yes; then
  57   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  58 fi
  59 # Remove the initial space we just introduced and, as these will be
  60 # expanded by make, quote '$'.
  61 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  62 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  63
  64 # Find the build, host, and target systems.
  65 ACX_NONCANONICAL_BUILD
  66 ACX_NONCANONICAL_HOST
  67 ACX_NONCANONICAL_TARGET
  68
  69 dnl Autoconf 2.5x and later will set a default program prefix if
  70 dnl --target was used, even if it was the same as --host.  Disable
  71 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  72 dnl to take effect.
  73 test "$host_noncanonical" = "$target_noncanonical" &&
  74   test "$program_prefix$program_suffix$program_transform_name" = \
  75     NONENONEs,x,x, &&
  76   program_transform_name=s,y,y,
  77
  78 AC_CANONICAL_SYSTEM
  79 AC_ARG_PROGRAM
  80
  81 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  82 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  83
  84 # Get 'install' or 'install-sh' and its variants.
  85 AC_PROG_INSTALL
  86 ACX_PROG_LN
  87 AC_PROG_LN_S
  88 AC_PROG_SED
  89 AC_PROG_AWK
  90
  91 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  92
  93 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  94 # a relative path.
  95 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  96   INSTALL="${srcpwd}/install-sh -c"
  97 fi
  98
  99 # Set srcdir to "." if that's what it is.
 100 # This is important for multilib support.
 101 pwd=`${PWDCMD-pwd}`
 102 if test "${pwd}" = "${srcpwd}" ; then
 103   srcdir=.
 104 fi
 105
 106 topsrcdir=$srcpwd
 107
 108 extra_host_args=
 109
 110 ### To add a new directory to the tree, first choose whether it is a target
 111 ### or a host dependent tool.  Then put it into the appropriate list
 112 ### (library or tools, host or target), doing a dependency sort.
 113
 114 # Subdirs will be configured in the order listed in build_configdirs,
 115 # configdirs, or target_configdirs; see the serialization section below.
 116
 117 # Dependency sorting is only needed when *configuration* must be done in
 118 # a particular order.  In all cases a dependency should be specified in
 119 # the Makefile, whether or not it's implicitly specified here.
 120
 121 # Double entries in build_configdirs, configdirs, or target_configdirs may
 122 # cause circular dependencies and break everything horribly.
 123
 124 # these library is used by various programs built for the build
 125 # environment
 126 #
 127 build_libs="build-libiberty build-libcpp"
 128
 129 # these tools are built for the build environment
 130 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 131
 132 # these libraries are used by various programs built for the host environment
 133 #f
 134 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libdecnumber gmp mpfr mpc isl libelf libiconv"
 135
 136 # these tools are built for the host environment
 137 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 138 # know that we are building the simulator.
 139 # binutils, gas and ld appear in that order because it makes sense to run
 140 # "make check" in that particular order.
 141 # If --enable-gold is used, "gold" may replace "ld".
 142 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools"
 143
 144 # these libraries are built for the target environment, and are built after
 145 # the host libraries and the host tools (which may be a cross compiler)
 146 # Note that libiberty is not a target library.
 147 target_libraries="target-libgcc \
 148                 target-libbacktrace \
 149                 target-libgloss \
 150                 target-newlib \
 151                 target-libgomp \
 152                 target-liboffloadmic \
 153                 target-libhsail-rt \
 154                 target-libatomic \
 155                 target-libitm \
 156                 target-libstdc++-v3 \
 157                 target-libsanitizer \
 158                 target-libvtv \
 159                 target-libssp \
 160                 target-libquadmath \
 161                 target-libgfortran \
 162                 target-libffi \
 163                 target-libobjc \
 164                 target-libada \
 165                 target-libgo \
 166                 target-libphobos \
 167                 target-zlib"
 168
 169 # these tools are built using the target libraries, and are intended to
 170 # run only in the target environment
 171 #
 172 # note: any program that *uses* libraries that are in the "target_libraries"
 173 # list belongs in this list.
 174 #
 175 target_tools="target-rda"
 176
 177 ################################################################################
 178
 179 ## All tools belong in one of the four categories, and are assigned above
 180 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 181 ## is important because configure will choke if they ever get through.
 182 ## ${configdirs} is directories we build using the host tools.
 183 ## ${target_configdirs} is directories we build using the target tools.
 184 configdirs=`echo ${host_libs} ${host_tools}`
 185 target_configdirs=`echo ${target_libraries} ${target_tools}`
 186 build_configdirs=`echo ${build_libs} ${build_tools}`
 187
 188 m4_divert_text([PARSE_ARGS],
 189 [case $srcdir in
 190   *" "*)
 191 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 192     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 193 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 194     ;;
 195 esac
 196 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 197 ])
 198
 199 ################################################################################
 200
 201 srcname="gnu development package"
 202
 203 # This gets set non-empty for some net releases of packages.
 204 appdirs=""
 205
 206 # Define is_cross_compiler to save on calls to 'test'.
 207 is_cross_compiler=
 208 if test x"${host}" = x"${target}" ; then
 209   is_cross_compiler=no
 210 else
 211   is_cross_compiler=yes
 212 fi
 213
 214 # Find the build and target subdir names.
 215 GCC_TOPLEV_SUBDIRS
 216 # Be sure to cover against remnants of an in-tree build.
 217 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 218   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 219 Use a pristine source tree when building in a separate tree])
 220 fi
 221
 222 # Skipdirs are removed silently.
 223 skipdirs=
 224 # Noconfigdirs are removed loudly.
 225 noconfigdirs=""
 226
 227 use_gnu_ld=
 228 # Make sure we don't let GNU ld be added if we didn't want it.
 229 if test x$with_gnu_ld = xno ; then
 230   use_gnu_ld=no
 231   noconfigdirs="$noconfigdirs ld gold"
 232 fi
 233
 234 use_gnu_as=
 235 # Make sure we don't let GNU as be added if we didn't want it.
 236 if test x$with_gnu_as = xno ; then
 237   use_gnu_as=no
 238   noconfigdirs="$noconfigdirs gas"
 239 fi
 240
 241 use_included_zlib=
 242 AC_ARG_WITH(system-zlib,
 243 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 244 # Make sure we don't let ZLIB be added if we didn't want it.
 245 if test x$with_system_zlib = xyes ; then
 246   use_included_zlib=no
 247   noconfigdirs="$noconfigdirs zlib"
 248 fi
 249
 250 # some tools are so dependent upon X11 that if we're not building with X,
 251 # it's not even worth trying to configure, much less build, that tool.
 252
 253 case ${with_x} in
 254   yes | "") ;; # the default value for this tree is that X11 is available
 255   no)
 256     skipdirs="${skipdirs} tk itcl libgui"
 257     # We won't be able to build gdbtk without X.
 258     enable_gdbtk=no
 259     ;;
 260   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 261 esac
 262
 263 # Some are only suitable for cross toolchains.
 264 # Remove these if host=target.
 265 cross_only="target-libgloss target-newlib target-opcodes"
 266
 267 case $is_cross_compiler in
 268   no) skipdirs="${skipdirs} ${cross_only}" ;;
 269 esac
 270
 271 # If both --with-headers and --with-libs are specified, default to
 272 # --without-newlib.
 273 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 274    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 275   if test x"${with_newlib}" = x ; then
 276     with_newlib=no
 277   fi
 278 fi
 279
 280 # Recognize --with-newlib/--without-newlib.
 281 case ${with_newlib} in
 282   no) skipdirs="${skipdirs} target-newlib" ;;
 283   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 284 esac
 285
 286 AC_ARG_ENABLE(as-accelerator-for,
 287 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 288                 [build as offload target compiler.
 289                 Specify offload host triple by ARG])])
 290
 291 AC_ARG_ENABLE(offload-targets,
 292 [AS_HELP_STRING([--enable-offload-targets=LIST],
 293                 [enable offloading to devices from comma-separated LIST of
 294                 TARGET[=DIR]. Use optional path to find offload target compiler
 295                 during the build])],
 296 [
 297   if test x"$enable_offload_targets" = x; then
 298     AC_MSG_ERROR([no offload targets specified])
 299   fi
 300 ], [enable_offload_targets=])
 301
 302 # Handle --enable-gold, --enable-ld.
 303 # --disable-gold [--enable-ld]
 304 #     Build only ld.  Default option.
 305 # --enable-gold [--enable-ld]
 306 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 307 #     as "ld.bfd" and "ld".
 308 # --enable-gold=default [--enable-ld]
 309 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 310 #     install ld as "ld.bfd".
 311 # --enable-gold[=default] --disable-ld
 312 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 313 # --enable-gold --enable-ld=default
 314 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 315 #     and ld.bfd).
 316 #     In other words, ld is default
 317 # --enable-gold=default --enable-ld=default
 318 #     Error.
 319
 320 default_ld=
 321 AC_ARG_ENABLE(gold,
 322 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 323                 [build gold @<:@ARG={default,yes,no}@:>@])],
 324 ENABLE_GOLD=$enableval,
 325 ENABLE_GOLD=no)
 326 case "${ENABLE_GOLD}" in
 327   yes|default)
 328     # Check for ELF target.
 329     is_elf=no
 330     case "${target}" in
 331       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 332       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 333       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 334       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 335         case "${target}" in
 336           *-*-linux*aout* | *-*-linux*oldld*)
 337             ;;
 338           *)
 339             is_elf=yes
 340             ;;
 341         esac
 342     esac
 343
 344     if test "$is_elf" = "yes"; then
 345       # Check for target supported by gold.
 346       case "${target}" in
 347         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 348         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-*)
 349           configdirs="$configdirs gold"
 350           if test x${ENABLE_GOLD} = xdefault; then
 351             default_ld=gold
 352           fi
 353           ENABLE_GOLD=yes
 354           ;;
 355       esac
 356     fi
 357     ;;
 358   no)
 359     ;;
 360   *)
 361     AC_MSG_ERROR([invalid --enable-gold argument])
 362     ;;
 363 esac
 364
 365 AC_ARG_ENABLE(ld,
 366 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 367                 [build ld @<:@ARG={default,yes,no}@:>@])],
 368 ENABLE_LD=$enableval,
 369 ENABLE_LD=yes)
 370
 371 case "${ENABLE_LD}" in
 372   default)
 373     if test x${default_ld} != x; then
 374       AC_MSG_ERROR([either gold or ld can be the default ld])
 375     fi
 376     ;;
 377   yes)
 378     ;;
 379   no)
 380     if test x${ENABLE_GOLD} != xyes; then
 381       AC_MSG_WARN([neither ld nor gold are enabled])
 382     fi
 383     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 384     ;;
 385   *)
 386     AC_MSG_ERROR([invalid --enable-ld argument])
 387     ;;
 388 esac
 389
 390 # PR gas/19109
 391 # Decide the default method for compressing debug sections.
 392 # Provide a configure time option to override our default.
 393 AC_ARG_ENABLE(compressed_debug_sections,
 394 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 395                 [Enable compressed debug sections for gas, gold or ld by
 396                  default])],
 397 [
 398   if test x"$enable_compressed_debug_sections" = xyes; then
 399     AC_MSG_ERROR([no program with compressed debug sections specified])
 400   fi
 401 ], [enable_compressed_debug_sections=])
 402
 403 # Configure extra directories which are host specific
 404
 405 case "${host}" in
 406   *-cygwin*)
 407     configdirs="$configdirs libtermcap" ;;
 408 esac
 409
 410 # A target can indicate whether a language isn't supported for some reason.
 411 # Only spaces may be used in this macro; not newlines or tabs.
 412 unsupported_languages=
 413
 414 # Remove more programs from consideration, based on the host or
 415 # target this usually means that a port of the program doesn't
 416 # exist yet.
 417
 418 case "${host}" in
 419   i[[3456789]]86-*-msdosdjgpp*)
 420     noconfigdirs="$noconfigdirs tcl tk itcl"
 421     ;;
 422 esac
 423
 424
 425 AC_ARG_ENABLE(libquadmath,
 426 AS_HELP_STRING([--disable-libquadmath],
 427   [do not build libquadmath directory]),
 428 ENABLE_LIBQUADMATH=$enableval,
 429 ENABLE_LIBQUADMATH=yes)
 430 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 431   noconfigdirs="$noconfigdirs target-libquadmath"
 432 fi
 433
 434
 435 AC_ARG_ENABLE(libquadmath-support,
 436 AS_HELP_STRING([--disable-libquadmath-support],
 437   [disable libquadmath support for Fortran]),
 438 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 439 ENABLE_LIBQUADMATH_SUPPORT=yes)
 440 enable_libquadmath_support=
 441 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 442   enable_libquadmath_support=no
 443 fi
 444
 445
 446 AC_ARG_ENABLE(libada,
 447 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 448 ENABLE_LIBADA=$enableval,
 449 ENABLE_LIBADA=yes)
 450 if test "${ENABLE_LIBADA}" != "yes" ; then
 451   noconfigdirs="$noconfigdirs gnattools"
 452 fi
 453
 454 AC_ARG_ENABLE(libssp,
 455 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 456 ENABLE_LIBSSP=$enableval,
 457 ENABLE_LIBSSP=yes)
 458
 459 AC_ARG_ENABLE(libstdcxx,
 460 AS_HELP_STRING([--disable-libstdcxx],
 461   [do not build libstdc++-v3 directory]),
 462 ENABLE_LIBSTDCXX=$enableval,
 463 ENABLE_LIBSTDCXX=default)
 464 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 465   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 466 fi]
 467
 468 # If this is accelerator compiler and its target is intelmic we enable
 469 # target liboffloadmic by default.  If this is compiler with offloading
 470 # for intelmic we enable host liboffloadmic by default.  Otherwise
 471 # liboffloadmic is disabled by default.
 472 AC_ARG_ENABLE([liboffloadmic],
 473 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 474                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 475 [case "$enableval" in
 476   no | host | target)
 477     enable_liboffloadmic=$enableval ;;
 478   *)
 479     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 480 esac],
 481 [if test x"$enable_as_accelerator_for" != x; then
 482   case "${target}" in
 483     *-intelmic-* | *-intelmicemul-*)
 484       enable_liboffloadmic=target
 485       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 486       ;;
 487     *)
 488       enable_liboffloadmic=no
 489       ;;
 490   esac
 491 else
 492   case "${enable_offload_targets}" in
 493     *-intelmic-* | *-intelmicemul-*)
 494       enable_liboffloadmic=host
 495       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 496       ;;
 497     *)
 498       enable_liboffloadmic=no
 499       ;;
 500     esac
 501 fi])
 502 AC_SUBST(extra_liboffloadmic_configure_flags)
 503
 504 # Enable libgomp by default on hosted POSIX systems, and a few others.
 505 if test x$enable_libgomp = x ; then
 506     case "${target}" in
 507     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 508         ;;
 509     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 510         ;;
 511     *-*-solaris2* | *-*-hpux11*)
 512         ;;
 513     *-*-darwin* | *-*-aix*)
 514         ;;
 515     nvptx*-*-*)
 516         ;;
 517     *)
 518         noconfigdirs="$noconfigdirs target-libgomp"
 519         ;;
 520     esac
 521 fi
 522
 523 # Disable libatomic on unsupported systems.
 524 if test -d ${srcdir}/libatomic; then
 525     if test x$enable_libatomic = x; then
 526         AC_MSG_CHECKING([for libatomic support])
 527         if (srcdir=${srcdir}/libatomic; \
 528                 . ${srcdir}/configure.tgt; \
 529                 test -n "$UNSUPPORTED")
 530         then
 531             AC_MSG_RESULT([no])
 532             noconfigdirs="$noconfigdirs target-libatomic"
 533         else
 534             AC_MSG_RESULT([yes])
 535         fi
 536     fi
 537 fi
 538
 539 # Disable liboffloadmic on unsupported systems.
 540 if test -d ${srcdir}/liboffloadmic; then
 541     if test x$enable_liboffloadmic != xno; then
 542         AC_MSG_CHECKING([for liboffloadmic support])
 543         if (srcdir=${srcdir}/liboffloadmic; \
 544                 . ${srcdir}/configure.tgt; \
 545                 test -n "$UNSUPPORTED")
 546         then
 547             AC_MSG_RESULT([no])
 548             noconfigdirs="$noconfigdirs target-liboffloadmic"
 549         else
 550             AC_MSG_RESULT([yes])
 551         fi
 552     fi
 553 fi
 554
 555 # Disable libitm on unsupported systems.
 556 if test -d ${srcdir}/libitm; then
 557     if test x$enable_libitm = x; then
 558         AC_MSG_CHECKING([for libitm support])
 559         if (srcdir=${srcdir}/libitm; \
 560                 . ${srcdir}/configure.tgt; \
 561                 test -n "$UNSUPPORTED")
 562         then
 563             AC_MSG_RESULT([no])
 564             noconfigdirs="$noconfigdirs target-libitm"
 565         else
 566             AC_MSG_RESULT([yes])
 567         fi
 568     fi
 569 fi
 570
 571 # Disable libsanitizer on unsupported systems.
 572 if test -d ${srcdir}/libsanitizer; then
 573     if test x$enable_libsanitizer = x; then
 574         AC_MSG_CHECKING([for libsanitizer support])
 575         if (srcdir=${srcdir}/libsanitizer; \
 576                 . ${srcdir}/configure.tgt; \
 577                 test -n "$UNSUPPORTED")
 578         then
 579             AC_MSG_RESULT([no])
 580             noconfigdirs="$noconfigdirs target-libsanitizer"
 581         else
 582             AC_MSG_RESULT([yes])
 583         fi
 584     fi
 585 fi
 586
 587 # Disable libvtv on unsupported systems.
 588 if test -d ${srcdir}/libvtv; then
 589     if test x$enable_libvtv = x; then
 590         AC_MSG_CHECKING([for libvtv support])
 591         if (srcdir=${srcdir}/libvtv; \
 592                 . ${srcdir}/configure.tgt; \
 593                 test "$VTV_SUPPORTED" != "yes")
 594         then
 595             AC_MSG_RESULT([no])
 596             noconfigdirs="$noconfigdirs target-libvtv"
 597         else
 598             AC_MSG_RESULT([yes])
 599         fi
 600     fi
 601 fi
 602
 603
 604 # Disable libhsail-rt on unsupported systems.
 605 if test -d ${srcdir}/libhsail-rt; then
 606     if test x$enable_libhsail_rt = x; then
 607         AC_MSG_CHECKING([for libhsail-rt support])
 608         if (srcdir=${srcdir}/libhsail-rt; \
 609                 . ${srcdir}/configure.tgt; \
 610                 test -n "$UNSUPPORTED")
 611         then
 612             AC_MSG_RESULT([no])
 613             unsupported_languages="$unsupported_languages brig"
 614             # This implicitly disables also target-libhsail-rt as it won't
 615             # get added to the build without BRIG FE.
 616         else
 617             AC_MSG_RESULT([yes])
 618         fi
 619     fi
 620 fi
 621
 622
 623 # Disable libquadmath for some systems.
 624 case "${target}" in
 625   avr-*-*)
 626     noconfigdirs="$noconfigdirs target-libquadmath"
 627     ;;
 628   # libquadmath is unused on AIX and libquadmath build process use of
 629   # LD_LIBRARY_PATH can break AIX bootstrap.
 630   powerpc-*-aix* | rs6000-*-aix*)
 631     noconfigdirs="$noconfigdirs target-libquadmath"
 632     ;;
 633 esac
 634
 635 # Disable libssp for some systems.
 636 case "${target}" in
 637   avr-*-*)
 638     # No hosted I/O support.
 639     noconfigdirs="$noconfigdirs target-libssp"
 640     ;;
 641   powerpc-*-aix* | rs6000-*-aix*)
 642     noconfigdirs="$noconfigdirs target-libssp"
 643     ;;
 644   rl78-*-*)
 645     # libssp uses a misaligned load to trigger a fault, but the RL78
 646     # doesn't fault for those - instead, it gives a build-time error
 647     # for explicit misaligned loads.
 648     noconfigdirs="$noconfigdirs target-libssp"
 649     ;;
 650   visium-*-*)
 651     # No hosted I/O support.
 652     noconfigdirs="$noconfigdirs target-libssp"
 653     ;;
 654 esac
 655
 656 # Disable libstdc++-v3 for some systems.
 657 # Allow user to override this if they pass --enable-libstdc++-v3
 658 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 659   case "${target}" in
 660     *-*-vxworks*)
 661       # VxWorks uses the Dinkumware C++ library.
 662       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 663       ;;
 664     arm*-wince-pe*)
 665       # the C++ libraries don't build on top of CE's C libraries
 666       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 667       ;;
 668     avr-*-*)
 669       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 670       ;;
 671     ft32-*-*)
 672       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 673       ;;
 674   esac
 675 fi
 676
 677 # Disable D on systems where it is known to not work.
 678 # For testing, you can override this with --enable-languages=d.
 679 case ,${enable_languages}, in
 680   *,d,*)
 681     ;;
 682   *)
 683     case "${target}" in
 684       *-*-darwin*)
 685         unsupported_languages="$unsupported_languages d"
 686         ;;
 687     esac
 688     ;;
 689 esac
 690
 691 # Disable libphobos on unsupported systems.
 692 # For testing, you can override this with --enable-libphobos.
 693 if test -d ${srcdir}/libphobos; then
 694     if test x$enable_libphobos = x; then
 695         AC_MSG_CHECKING([for libphobos support])
 696         if (srcdir=${srcdir}/libphobos; \
 697                 . ${srcdir}/configure.tgt; \
 698                 test "$LIBPHOBOS_SUPPORTED" != "yes")
 699         then
 700             AC_MSG_RESULT([no])
 701             noconfigdirs="$noconfigdirs target-libphobos"
 702         else
 703             AC_MSG_RESULT([yes])
 704         fi
 705     fi
 706 fi
 707
 708 # Disable Fortran for some systems.
 709 case "${target}" in
 710   mmix-*-*)
 711     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 712     unsupported_languages="$unsupported_languages fortran"
 713     ;;
 714 esac
 715
 716 # Disable libffi for some systems.
 717 case "${target}" in
 718   powerpc-*-darwin*)
 719     ;;
 720   i[[3456789]]86-*-darwin*)
 721     ;;
 722   x86_64-*-darwin[[912]]*)
 723     ;;
 724   *-*-darwin*)
 725     noconfigdirs="$noconfigdirs target-libffi"
 726     ;;
 727   *-*-netware*)
 728     noconfigdirs="$noconfigdirs target-libffi"
 729     ;;
 730   *-*-phoenix*)
 731     noconfigdirs="$noconfigdirs target-libffi"
 732     ;;
 733   *-*-rtems*)
 734     noconfigdirs="$noconfigdirs target-libffi"
 735     ;;
 736   *-*-tpf*)
 737     noconfigdirs="$noconfigdirs target-libffi"
 738     ;;
 739   *-*-uclinux*)
 740     noconfigdirs="$noconfigdirs target-libffi"
 741     ;;
 742   *-*-vxworks*)
 743     noconfigdirs="$noconfigdirs target-libffi"
 744     ;;
 745   aarch64*-*-freebsd*)
 746     noconfigdirs="$noconfigdirs target-libffi"
 747     ;;
 748   alpha*-*-*vms*)
 749     noconfigdirs="$noconfigdirs target-libffi"
 750     ;;
 751   arm*-*-freebsd*)
 752     noconfigdirs="$noconfigdirs target-libffi"
 753     ;;
 754   arm-wince-pe)
 755     noconfigdirs="$noconfigdirs target-libffi"
 756     ;;
 757   arm*-*-symbianelf*)
 758     noconfigdirs="$noconfigdirs target-libffi"
 759     ;;
 760   cris-*-* | crisv32-*-*)
 761     case "${target}" in
 762       *-*-linux*)
 763         ;;
 764       *) # See PR46792 regarding target-libffi.
 765         noconfigdirs="$noconfigdirs target-libffi";;
 766     esac
 767     ;;
 768   hppa*64*-*-hpux*)
 769     noconfigdirs="$noconfigdirs target-libffi"
 770     ;;
 771   hppa*-hp-hpux11*)
 772     ;;
 773   hppa*-*-hpux*)
 774     noconfigdirs="$noconfigdirs target-libffi"
 775     ;;
 776   ia64*-*-*vms*)
 777     noconfigdirs="$noconfigdirs target-libffi"
 778     ;;
 779   i[[3456789]]86-w64-mingw*)
 780     noconfigdirs="$noconfigdirs target-libffi"
 781     ;;
 782   i[[3456789]]86-*-mingw*)
 783     noconfigdirs="$noconfigdirs target-libffi"
 784     ;;
 785   x86_64-*-mingw*)
 786     noconfigdirs="$noconfigdirs target-libffi"
 787     ;;
 788   mmix-*-*)
 789     noconfigdirs="$noconfigdirs target-libffi"
 790     ;;
 791   powerpc-*-aix*)
 792     ;;
 793   rs6000-*-aix*)
 794     ;;
 795   ft32-*-*)
 796     noconfigdirs="$noconfigdirs target-libffi"
 797     ;;
 798   *-*-lynxos*)
 799     noconfigdirs="$noconfigdirs target-libffi"
 800     ;;
 801 esac
 802
 803 # Disable the go frontend on systems where it is known to not work. Please keep
 804 # this in sync with contrib/config-list.mk.
 805 case "${target}" in
 806 *-*-darwin* | *-*-cygwin* | *-*-mingw*)
 807     unsupported_languages="$unsupported_languages go"
 808     ;;
 809 esac
 810
 811 # Disable libgo for some systems where it is known to not work.
 812 # For testing, you can easily override this with --enable-libgo.
 813 if test x$enable_libgo = x; then
 814     case "${target}" in
 815     *-*-darwin*)
 816         # PR 46986
 817         noconfigdirs="$noconfigdirs target-libgo"
 818         ;;
 819     *-*-cygwin* | *-*-mingw*)
 820         noconfigdirs="$noconfigdirs target-libgo"
 821         ;;
 822     esac
 823 fi
 824
 825 # Default libgloss CPU subdirectory.
 826 libgloss_dir="$target_cpu"
 827
 828 case "${target}" in
 829   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 830     libgloss_dir=wince
 831     ;;
 832   aarch64*-*-* )
 833     libgloss_dir=aarch64
 834     ;;
 835   arm*-*-*)
 836     libgloss_dir=arm
 837     ;;
 838   cris-*-* | crisv32-*-*)
 839     libgloss_dir=cris
 840     ;;
 841   hppa*-*-*)
 842     libgloss_dir=pa
 843     ;;
 844   i[[3456789]]86-*-*)
 845     libgloss_dir=i386
 846     ;;
 847   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 848     libgloss_dir=m68hc11
 849     ;;
 850   m68*-*-* | fido-*-*)
 851     libgloss_dir=m68k
 852     ;;
 853   mips*-*-*)
 854     libgloss_dir=mips
 855     ;;
 856   powerpc*-*-*)
 857     libgloss_dir=rs6000
 858     ;;
 859   sparc*-*-*)
 860     libgloss_dir=sparc
 861     ;;
 862 esac
 863
 864 # Disable newlib and libgloss for various target OSes.
 865 case "${target}" in
 866   alpha*-dec-osf*)
 867     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 868     ;;
 869   i[[3456789]]86-*-linux*)
 870     # This section makes it possible to build newlib natively on linux.
 871     # If we are using a cross compiler then don't configure newlib.
 872     if test x${is_cross_compiler} != xno ; then
 873       noconfigdirs="$noconfigdirs target-newlib"
 874     fi
 875     noconfigdirs="$noconfigdirs target-libgloss"
 876     # If we are not using a cross compiler, do configure newlib.
 877     # Note however, that newlib will only be configured in this situation
 878     # if the --with-newlib option has been given, because otherwise
 879     # 'target-newlib' will appear in skipdirs.
 880     ;;
 881   i[[3456789]]86-*-rdos*)
 882     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 883     ;;
 884   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 885     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 886     ;;
 887   sparc-*-sunos4*)
 888     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 889     ;;
 890   *-*-aix*)
 891     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 892     ;;
 893   *-*-beos*)
 894     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 895     ;;
 896   *-*-chorusos)
 897     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 898     ;;
 899   *-*-dragonfly*)
 900     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 901     ;;
 902   *-*-freebsd*)
 903     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 904     ;;
 905   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 906     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 907     ;;
 908   *-*-lynxos*)
 909     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 910     ;;
 911   *-*-mingw*)
 912     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 913     ;;
 914   *-*-netbsd*)
 915     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 916     ;;
 917   *-*-netware*)
 918     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 919     ;;
 920   *-*-tpf*)
 921     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 922     ;;
 923   *-*-uclinux*)
 924     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 925     ;;
 926   *-*-vxworks*)
 927     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 928     ;;
 929 esac
 930
 931 case "${target}" in
 932   *-*-chorusos)
 933     ;;
 934   aarch64-*-darwin*)
 935     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 936     noconfigdirs="$noconfigdirs sim target-rda"
 937     ;;
 938   amdgcn*-*-*)
 939     ;;
 940   arm-*-darwin*)
 941     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 942     noconfigdirs="$noconfigdirs sim target-rda"
 943     ;;
 944   powerpc-*-darwin*)
 945     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 946     noconfigdirs="$noconfigdirs sim target-rda"
 947     ;;
 948   i[[3456789]]86-*-darwin*)
 949     noconfigdirs="$noconfigdirs ld gprof"
 950     noconfigdirs="$noconfigdirs sim target-rda"
 951     ;;
 952   x86_64-*-darwin[[912]]*)
 953     noconfigdirs="$noconfigdirs ld gas gprof"
 954     noconfigdirs="$noconfigdirs sim target-rda"
 955     ;;
 956   *-*-darwin*)
 957     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 958     noconfigdirs="$noconfigdirs sim target-rda"
 959     ;;
 960   *-*-dragonfly*)
 961     ;;
 962   *-*-freebsd*)
 963     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
 964         && ! test -d ${srcdir}/gmp \
 965         && test -f /usr/local/include/gmp.h; then
 966       with_gmp=/usr/local
 967     fi
 968     ;;
 969   *-*-kaos*)
 970     # Remove unsupported stuff on all kaOS configurations.
 971     noconfigdirs="$noconfigdirs target-libgloss"
 972     ;;
 973   *-*-netbsd*)
 974     ;;
 975   *-*-netware*)
 976     ;;
 977   *-*-phoenix*)
 978     noconfigdirs="$noconfigdirs target-libgloss"
 979     ;;
 980   *-*-rtems*)
 981     noconfigdirs="$noconfigdirs target-libgloss"
 982     ;;
 983     # The tpf target doesn't support gdb yet.
 984   *-*-tpf*)
 985     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
 986     ;;
 987   *-*-uclinux*)
 988     noconfigdirs="$noconfigdirs target-rda"
 989     ;;
 990   *-*-vxworks*)
 991     ;;
 992   alpha*-dec-osf*)
 993     # ld works, but does not support shared libraries.
 994     # gas doesn't generate exception information.
 995     noconfigdirs="$noconfigdirs gas ld"
 996     ;;
 997   alpha*-*-*vms*)
 998     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
 999     ;;
1000   alpha*-*-*)
1001     # newlib is not 64 bit ready
1002     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1003     ;;
1004   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1005     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1006     ;;
1007   arc*-*-*)
1008     noconfigdirs="$noconfigdirs sim"
1009     ;;
1010   arm-*-pe*)
1011     noconfigdirs="$noconfigdirs target-libgloss"
1012     ;;
1013   arm-*-riscix*)
1014     noconfigdirs="$noconfigdirs ld target-libgloss"
1015     ;;
1016   avr-*-*)
1017     if test x${with_avrlibc} != xno; then
1018       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1019     fi
1020     ;;
1021   c4x-*-* | tic4x-*-*)
1022     noconfigdirs="$noconfigdirs target-libgloss"
1023     ;;
1024   tic54x-*-*)
1025     noconfigdirs="$noconfigdirs target-libgloss gdb"
1026     ;;
1027   d10v-*-*)
1028     noconfigdirs="$noconfigdirs target-libgloss"
1029     ;;
1030   d30v-*-*)
1031     noconfigdirs="$noconfigdirs gdb"
1032     ;;
1033   fr30-*-elf*)
1034     noconfigdirs="$noconfigdirs gdb"
1035     ;;
1036   ft32-*-*)
1037     noconfigdirs="$noconfigdirs target-rda gprof"
1038     ;;
1039   moxie-*-*)
1040     noconfigdirs="$noconfigdirs"
1041     ;;
1042   h8300*-*-*)
1043     noconfigdirs="$noconfigdirs target-libgloss"
1044     ;;
1045   h8500-*-*)
1046     noconfigdirs="$noconfigdirs target-libgloss"
1047     ;;
1048   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1049     ;;
1050   hppa*64*-*-hpux*)
1051     noconfigdirs="$noconfigdirs gdb"
1052     ;;
1053   hppa*-*-hpux11*)
1054     noconfigdirs="$noconfigdirs gdb ld"
1055     ;;
1056   hppa*64*-*-linux*)
1057     ;;
1058   hppa*-*-linux*)
1059     ;;
1060   hppa*-*-*elf* | \
1061   hppa*-*-lites* | \
1062   hppa*-*-openbsd* | \
1063   hppa*64*-*-*)
1064     ;;
1065   hppa*-*-pro*)
1066     ;;
1067   hppa*-*-*)
1068     noconfigdirs="$noconfigdirs ld"
1069     ;;
1070   i960-*-*)
1071     noconfigdirs="$noconfigdirs gdb"
1072     ;;
1073   ia64*-*-elf*)
1074     # No gdb support yet.
1075     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1076     ;;
1077   ia64*-**-hpux*)
1078     # No ld support yet.
1079     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1080     ;;
1081   ia64*-*-*vms*)
1082     # No ld support yet.
1083     noconfigdirs="$noconfigdirs libgui itcl ld"
1084     ;;
1085   i[[3456789]]86-w64-mingw*)
1086     ;;
1087   i[[3456789]]86-*-mingw*)
1088     target_configdirs="$target_configdirs target-winsup"
1089     ;;
1090   *-*-cygwin*)
1091     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1092     noconfigdirs="$noconfigdirs target-libgloss"
1093     # always build newlib if winsup directory is present.
1094     if test -d "$srcdir/winsup/cygwin"; then
1095       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1096     elif test -d "$srcdir/newlib"; then
1097       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1098     fi
1099     ;;
1100   i[[3456789]]86-*-pe)
1101     noconfigdirs="$noconfigdirs target-libgloss"
1102     ;;
1103   i[[3456789]]86-*-sco3.2v5*)
1104     # The linker does not yet know about weak symbols in COFF,
1105     # and is not configured to handle mixed ELF and COFF.
1106     noconfigdirs="$noconfigdirs ld target-libgloss"
1107     ;;
1108   i[[3456789]]86-*-sco*)
1109     noconfigdirs="$noconfigdirs gprof target-libgloss"
1110     ;;
1111   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1112     noconfigdirs="$noconfigdirs target-libgloss"
1113     ;;
1114   i[[3456789]]86-*-sysv4*)
1115     noconfigdirs="$noconfigdirs target-libgloss"
1116     ;;
1117   i[[3456789]]86-*-beos*)
1118     noconfigdirs="$noconfigdirs gdb"
1119     ;;
1120   i[[3456789]]86-*-rdos*)
1121     noconfigdirs="$noconfigdirs gdb"
1122     ;;
1123   mmix-*-*)
1124     noconfigdirs="$noconfigdirs gdb"
1125     ;;
1126   mt-*-*)
1127     noconfigdirs="$noconfigdirs sim"
1128     ;;
1129   nfp-*-*)
1130     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1131     noconfigdirs="$noconfigdirs $target_libraries"
1132     ;;
1133   powerpc-*-aix*)
1134     # copied from rs6000-*-* entry
1135     noconfigdirs="$noconfigdirs gprof"
1136     ;;
1137   powerpc*-*-winnt* | powerpc*-*-pe*)
1138     target_configdirs="$target_configdirs target-winsup"
1139     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1140     # always build newlib.
1141     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1142     ;;
1143     # This is temporary until we can link against shared libraries
1144   powerpcle-*-solaris*)
1145     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1146     ;;
1147   powerpc-*-beos*)
1148     noconfigdirs="$noconfigdirs gdb"
1149     ;;
1150   rs6000-*-lynxos*)
1151     noconfigdirs="$noconfigdirs gprof"
1152     ;;
1153   rs6000-*-aix*)
1154     noconfigdirs="$noconfigdirs gprof"
1155     ;;
1156   rs6000-*-*)
1157     noconfigdirs="$noconfigdirs gprof"
1158     ;;
1159   m68k-apollo-*)
1160     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1161     ;;
1162   microblaze*)
1163     noconfigdirs="$noconfigdirs gprof"
1164     ;;
1165   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1166     if test x$with_newlib = xyes; then
1167       noconfigdirs="$noconfigdirs gprof"
1168     fi
1169     ;;
1170   mips*-*-irix5*)
1171     noconfigdirs="$noconfigdirs gprof target-libgloss"
1172     ;;
1173   mips*-*-irix6*)
1174     noconfigdirs="$noconfigdirs gprof target-libgloss"
1175     ;;
1176   mips*-*-bsd*)
1177     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1178     ;;
1179   mips*-*-linux*)
1180     ;;
1181   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1182   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1183     noconfigdirs="$noconfigdirs ld gas gprof"
1184     ;;
1185   mips*-*-*)
1186     noconfigdirs="$noconfigdirs gprof"
1187     ;;
1188   nvptx*-*-*)
1189     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1190     ;;
1191   sh-*-*)
1192     case "${target}" in
1193       sh*-*-elf)
1194          ;;
1195       *)
1196          noconfigdirs="$noconfigdirs target-libgloss" ;;
1197     esac
1198     ;;
1199   sparc-*-sunos4*)
1200     if test x${is_cross_compiler} = xno ; then
1201            use_gnu_ld=no
1202     fi
1203     ;;
1204   tic6x-*-*)
1205     noconfigdirs="$noconfigdirs sim"
1206     ;;
1207   tilepro*-*-* | tilegx*-*-*)
1208     noconfigdirs="$noconfigdirs sim"
1209     ;;
1210   v810-*-*)
1211     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1212     ;;
1213   vax-*-*)
1214     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1215     ;;
1216   wasm32-*-*)
1217     noconfigdirs="$noconfigdirs ld"
1218     ;;
1219 esac
1220
1221 # If we aren't building newlib, then don't build libgloss, since libgloss
1222 # depends upon some newlib header files.
1223 case "${noconfigdirs}" in
1224   *target-libgloss*) ;;
1225   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1226 esac
1227
1228 # Work in distributions that contain no compiler tools, like Autoconf.
1229 host_makefile_frag=/dev/null
1230 if test -d ${srcdir}/config ; then
1231 case "${host}" in
1232   i[[3456789]]86-*-msdosdjgpp*)
1233     host_makefile_frag="config/mh-djgpp"
1234     ;;
1235   *-cygwin*)
1236     ACX_CHECK_CYGWIN_CAT_WORKS
1237     host_makefile_frag="config/mh-cygwin"
1238     ;;
1239   *-mingw*)
1240     host_makefile_frag="config/mh-mingw"
1241     ;;
1242   alpha*-linux*)
1243     host_makefile_frag="config/mh-alpha-linux"
1244     ;;
1245   hppa*-hp-hpux10*)
1246     host_makefile_frag="config/mh-pa-hpux10"
1247     ;;
1248   hppa*-hp-hpux*)
1249     host_makefile_frag="config/mh-pa"
1250     ;;
1251   hppa*-*)
1252     host_makefile_frag="config/mh-pa"
1253     ;;
1254   *-*-darwin*)
1255     host_makefile_frag="config/mh-darwin"
1256     ;;
1257   powerpc-*-aix*)
1258     host_makefile_frag="config/mh-ppc-aix"
1259     ;;
1260   rs6000-*-aix*)
1261     host_makefile_frag="config/mh-ppc-aix"
1262     ;;
1263 esac
1264 fi
1265
1266 if test "${build}" != "${host}" ; then
1267   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1268   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1269   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1270   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1271   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1272   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1273   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1274   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1275   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1276   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1277   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1278   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1279   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1280 else
1281   AR_FOR_BUILD="\$(AR)"
1282   AS_FOR_BUILD="\$(AS)"
1283   CC_FOR_BUILD="\$(CC)"
1284   CXX_FOR_BUILD="\$(CXX)"
1285   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1286   GOC_FOR_BUILD="\$(GOC)"
1287   GDC_FOR_BUILD="\$(GDC)"
1288   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1289   LD_FOR_BUILD="\$(LD)"
1290   NM_FOR_BUILD="\$(NM)"
1291   RANLIB_FOR_BUILD="\$(RANLIB)"
1292   WINDRES_FOR_BUILD="\$(WINDRES)"
1293   WINDMC_FOR_BUILD="\$(WINDMC)"
1294 fi
1295
1296 AC_PROG_CC
1297 AC_PROG_CXX
1298
1299 # We must set the default linker to the linker used by gcc for the correct
1300 # operation of libtool.  If LD is not defined and we are using gcc, try to
1301 # set the LD default to the ld used by gcc.
1302 if test -z "$LD"; then
1303   if test "$GCC" = yes; then
1304     case $build in
1305     *-*-mingw*)
1306       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1307     *)
1308       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1309     esac
1310     case $gcc_prog_ld in
1311     # Accept absolute paths.
1312     [[\\/]* | [A-Za-z]:[\\/]*)]
1313       LD="$gcc_prog_ld" ;;
1314     esac
1315   fi
1316 fi
1317
1318 # Check whether -static-libstdc++ -static-libgcc is supported.
1319 have_static_libs=no
1320 if test "$GCC" = yes; then
1321   saved_LDFLAGS="$LDFLAGS"
1322
1323   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1324   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1325   AC_LANG_PUSH(C++)
1326   AC_LINK_IFELSE([AC_LANG_SOURCE([
1327 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1328 #error -static-libstdc++ not implemented
1329 #endif
1330 int main() {}])],
1331     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1332     [AC_MSG_RESULT([no])])
1333   AC_LANG_POP(C++)
1334
1335   LDFLAGS="$saved_LDFLAGS"
1336 fi
1337
1338 ACX_PROG_GNAT
1339 ACX_PROG_CMP_IGNORE_INITIAL
1340
1341 AC_ARG_ENABLE([bootstrap],
1342 [AS_HELP_STRING([--enable-bootstrap],
1343                 [enable bootstrapping @<:@yes if native build@:>@])],,
1344 enable_bootstrap=default)
1345
1346 # Issue errors and warnings for invalid/strange bootstrap combinations.
1347 if test -r $srcdir/gcc/configure; then
1348   have_compiler=yes
1349 else
1350   have_compiler=no
1351 fi
1352
1353 case "$have_compiler:$host:$target:$enable_bootstrap" in
1354   *:*:*:no) ;;
1355
1356   # Default behavior.  Enable bootstrap if we have a compiler
1357   # and we are in a native configuration.
1358   yes:$build:$build:default)
1359     enable_bootstrap=yes ;;
1360
1361   *:*:*:default)
1362     enable_bootstrap=no ;;
1363
1364   # We have a compiler and we are in a native configuration, bootstrap is ok
1365   yes:$build:$build:yes)
1366     ;;
1367
1368   # Other configurations, but we have a compiler.  Assume the user knows
1369   # what he's doing.
1370   yes:*:*:yes)
1371     AC_MSG_WARN([trying to bootstrap a cross compiler])
1372     ;;
1373
1374   # No compiler: if they passed --enable-bootstrap explicitly, fail
1375   no:*:*:yes)
1376     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1377
1378   # Fail if wrong command line
1379   *)
1380     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1381     ;;
1382 esac
1383
1384 # When bootstrapping with GCC, build stage 1 in C++98 mode to ensure that a
1385 # C++98 compiler can still start the bootstrap.
1386 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1387   CXX="$CXX -std=gnu++98"
1388 fi
1389
1390 # Used for setting $lt_cv_objdir
1391 _LT_CHECK_OBJDIR
1392
1393 # Check for GMP, MPFR and MPC
1394 gmplibs="-lmpc -lmpfr -lgmp"
1395 gmpinc=
1396 have_gmp=no
1397
1398 # Specify a location for mpc
1399 # check for this first so it ends up on the link line before mpfr.
1400 AC_ARG_WITH(mpc,
1401 [AS_HELP_STRING([--with-mpc=PATH],
1402                 [specify prefix directory for installed MPC package.
1403                  Equivalent to --with-mpc-include=PATH/include
1404                  plus --with-mpc-lib=PATH/lib])])
1405 AC_ARG_WITH(mpc-include,
1406 [AS_HELP_STRING([--with-mpc-include=PATH],
1407                 [specify directory for installed MPC include files])])
1408 AC_ARG_WITH(mpc-lib,
1409 [AS_HELP_STRING([--with-mpc-lib=PATH],
1410                 [specify directory for the installed MPC library])])
1411
1412 if test "x$with_mpc" != x; then
1413   gmplibs="-L$with_mpc/lib $gmplibs"
1414   gmpinc="-I$with_mpc/include $gmpinc"
1415 fi
1416 if test "x$with_mpc_include" != x; then
1417   gmpinc="-I$with_mpc_include $gmpinc"
1418 fi
1419 if test "x$with_mpc_lib" != x; then
1420   gmplibs="-L$with_mpc_lib $gmplibs"
1421 fi
1422 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1423   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1424   gmpinc='-I$$s/mpc/src '"$gmpinc"
1425   # Do not test the mpc version.  Assume that it is sufficient, since
1426   # it is in the source tree, and the library has not been built yet
1427   # but it would be included on the link line in the version check below
1428   # hence making the test fail.
1429   have_gmp=yes
1430 fi
1431
1432 # Specify a location for mpfr
1433 # check for this first so it ends up on the link line before gmp.
1434 AC_ARG_WITH(mpfr-dir,
1435 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1436 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1437 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1438
1439 AC_ARG_WITH(mpfr,
1440 [AS_HELP_STRING([--with-mpfr=PATH],
1441                 [specify prefix directory for installed MPFR package.
1442                  Equivalent to --with-mpfr-include=PATH/include
1443                  plus --with-mpfr-lib=PATH/lib])])
1444 AC_ARG_WITH(mpfr-include,
1445 [AS_HELP_STRING([--with-mpfr-include=PATH],
1446                 [specify directory for installed MPFR include files])])
1447 AC_ARG_WITH(mpfr-lib,
1448 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1449                 [specify directory for the installed MPFR library])])
1450
1451 if test "x$with_mpfr" != x; then
1452   gmplibs="-L$with_mpfr/lib $gmplibs"
1453   gmpinc="-I$with_mpfr/include $gmpinc"
1454 fi
1455 if test "x$with_mpfr_include" != x; then
1456   gmpinc="-I$with_mpfr_include $gmpinc"
1457 fi
1458 if test "x$with_mpfr_lib" != x; then
1459   gmplibs="-L$with_mpfr_lib $gmplibs"
1460 fi
1461 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1462   # MPFR v3.1.0 moved the sources into a src sub-directory.
1463   if ! test -d ${srcdir}/mpfr/src; then
1464     AC_MSG_ERROR([dnl
1465 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1466   fi
1467   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1468   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1469   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1470   # Do not test the mpfr version.  Assume that it is sufficient, since
1471   # it is in the source tree, and the library has not been built yet
1472   # but it would be included on the link line in the version check below
1473   # hence making the test fail.
1474   have_gmp=yes
1475 fi
1476
1477 # Specify a location for gmp
1478 AC_ARG_WITH(gmp-dir,
1479 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1480 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1481 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1482
1483 AC_ARG_WITH(gmp,
1484 [AS_HELP_STRING([--with-gmp=PATH],
1485                 [specify prefix directory for the installed GMP package.
1486                  Equivalent to --with-gmp-include=PATH/include
1487                  plus --with-gmp-lib=PATH/lib])])
1488 AC_ARG_WITH(gmp-include,
1489 [AS_HELP_STRING([--with-gmp-include=PATH],
1490                 [specify directory for installed GMP include files])])
1491 AC_ARG_WITH(gmp-lib,
1492 [AS_HELP_STRING([--with-gmp-lib=PATH],
1493                 [specify directory for the installed GMP library])])
1494
1495
1496 if test "x$with_gmp" != x; then
1497   gmplibs="-L$with_gmp/lib $gmplibs"
1498   gmpinc="-I$with_gmp/include $gmpinc"
1499 fi
1500 if test "x$with_gmp_include" != x; then
1501   gmpinc="-I$with_gmp_include $gmpinc"
1502 fi
1503 if test "x$with_gmp_lib" != x; then
1504   gmplibs="-L$with_gmp_lib $gmplibs"
1505 fi
1506 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1507   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1508   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1509   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1510   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1511   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1512   # Do not test the gmp version.  Assume that it is sufficient, since
1513   # it is in the source tree, and the library has not been built yet
1514   # but it would be included on the link line in the version check below
1515   # hence making the test fail.
1516   have_gmp=yes
1517 fi
1518
1519 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1520   have_gmp=yes
1521   saved_CFLAGS="$CFLAGS"
1522   CFLAGS="$CFLAGS $gmpinc"
1523   # Check for the recommended and required versions of GMP.
1524   AC_MSG_CHECKING([for the correct version of gmp.h])
1525   AC_TRY_COMPILE([#include "gmp.h"],[
1526   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1527   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1528   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1529   choke me
1530   #endif
1531   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1532   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1533   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1534   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1535   choke me
1536   #endif
1537   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1538    [AC_MSG_RESULT([no]); have_gmp=no])
1539
1540   # If we have GMP, check the MPFR version.
1541   if test x"$have_gmp" = xyes; then
1542     # Check for the recommended and required versions of MPFR.
1543     AC_MSG_CHECKING([for the correct version of mpfr.h])
1544     AC_TRY_COMPILE([#include <gmp.h>
1545     #include <mpfr.h>],[
1546     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,0)
1547     choke me
1548     #endif
1549     ], [AC_TRY_COMPILE([#include <gmp.h>
1550     #include <mpfr.h>],[
1551     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,2)
1552     choke me
1553     #endif
1554     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1555      [AC_MSG_RESULT([no]); have_gmp=no])
1556   fi
1557
1558   # Check for the MPC header version.
1559   if test x"$have_gmp" = xyes ; then
1560     # Check for the recommended and required versions of MPC.
1561     AC_MSG_CHECKING([for the correct version of mpc.h])
1562     AC_TRY_COMPILE([#include <mpc.h>],[
1563     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1564     choke me
1565     #endif
1566     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1567     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1568     choke me
1569     #endif
1570     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1571      [AC_MSG_RESULT([no]); have_gmp=no])
1572   fi
1573
1574   # Now check the MPFR library.
1575   if test x"$have_gmp" = xyes; then
1576     saved_LIBS="$LIBS"
1577     LIBS="$LIBS $gmplibs"
1578     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1579     AC_TRY_LINK([#include <mpc.h>],[
1580     mpfr_t n;
1581     mpfr_t x;
1582     mpc_t c;
1583     int t;
1584     mpfr_init (n);
1585     mpfr_init (x);
1586     mpfr_atan2 (n, n, x, GMP_RNDN);
1587     mpfr_erfc (n, x, GMP_RNDN);
1588     mpfr_subnormalize (x, t, GMP_RNDN);
1589     mpfr_clear(n);
1590     mpfr_clear(x);
1591     mpc_init2 (c, 53);
1592     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1593     mpc_cosh (c, c, MPC_RNDNN);
1594     mpc_pow (c, c, c, MPC_RNDNN);
1595     mpc_acosh (c, c, MPC_RNDNN);
1596     mpc_clear (c);
1597     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1598     LIBS="$saved_LIBS"
1599   fi
1600
1601   CFLAGS="$saved_CFLAGS"
1602
1603 # The library versions listed in the error message below should match
1604 # the HARD-minimums enforced above.
1605   if test x$have_gmp != xyes; then
1606     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
1607 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1608 their locations.  Source code for these libraries can be found at
1609 their respective hosting sites as well as at
1610 ftp://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1611 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1612 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1613 make sure that you have installed both the libraries and the header
1614 files.  They may be located in separate packages.])
1615   fi
1616 fi
1617
1618 # Flags needed for both GMP, MPFR and/or MPC.
1619 AC_SUBST(gmplibs)
1620 AC_SUBST(gmpinc)
1621 AC_SUBST(extra_mpfr_configure_flags)
1622 AC_SUBST(extra_mpc_gmp_configure_flags)
1623 AC_SUBST(extra_mpc_mpfr_configure_flags)
1624 AC_SUBST(extra_isl_gmp_configure_flags)
1625
1626 # Libraries to use for stage1 or when not bootstrapping.
1627 AC_ARG_WITH(stage1-libs,
1628 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1629 [if test "$withval" = "no" -o "$withval" = "yes"; then
1630    stage1_libs=
1631  else
1632    stage1_libs=$withval
1633  fi],
1634 [stage1_libs=])
1635 AC_SUBST(stage1_libs)
1636
1637 # Linker flags to use for stage1 or when not bootstrapping.
1638 AC_ARG_WITH(stage1-ldflags,
1639 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1640 [if test "$withval" = "no" -o "$withval" = "yes"; then
1641    stage1_ldflags=
1642  else
1643    stage1_ldflags=$withval
1644  fi],
1645 [stage1_ldflags=
1646  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1647  # if supported.  But if the user explicitly specified the libraries to use,
1648  # trust that they are doing what they want.
1649  if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
1650    stage1_ldflags="-static-libstdc++ -static-libgcc"
1651  fi])
1652 AC_SUBST(stage1_ldflags)
1653
1654 # Libraries to use for stage2 and later builds.
1655 AC_ARG_WITH(boot-libs,
1656 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1657 [if test "$withval" = "no" -o "$withval" = "yes"; then
1658    poststage1_libs=
1659  else
1660    poststage1_libs=$withval
1661  fi],
1662 [poststage1_libs=])
1663 AC_SUBST(poststage1_libs)
1664
1665 # Linker flags to use for stage2 and later builds.
1666 AC_ARG_WITH(boot-ldflags,
1667 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1668                 [linker flags for stage2 and later])],
1669 [if test "$withval" = "no" -o "$withval" = "yes"; then
1670    poststage1_ldflags=
1671  else
1672    poststage1_ldflags=$withval
1673  fi],
1674 [poststage1_ldflags=
1675  # In stages 2 and 3, default to linking libstdc++ and libgcc
1676  # statically.  But if the user explicitly specified the libraries to
1677  # use, trust that they are doing what they want.
1678  if test "$poststage1_libs" = ""; then
1679    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1680  fi])
1681 AC_SUBST(poststage1_ldflags)
1682
1683 # GCC GRAPHITE dependency isl.
1684 # Basic setup is inlined here, actual checks are in config/isl.m4
1685
1686 AC_ARG_WITH(isl,
1687   [AS_HELP_STRING(
1688    [--with-isl=PATH],
1689    [Specify prefix directory for the installed isl package.
1690     Equivalent to --with-isl-include=PATH/include
1691     plus --with-isl-lib=PATH/lib])])
1692
1693 # Treat --without-isl as a request to disable
1694 # GRAPHITE support and skip all following checks.
1695 if test "x$with_isl" != "xno"; then
1696   # Check for isl
1697   dnl Provide configure switches and initialize islinc & isllibs
1698   dnl with user input.
1699   ISL_INIT_FLAGS
1700   dnl The versions of isl that work for Graphite
1701   ISL_CHECK_VERSION()
1702   dnl Only execute fail-action, if isl has been requested.
1703   ISL_IF_FAILED([
1704     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1705 fi
1706
1707 # If the isl check failed, disable builds of in-tree variant of isl
1708 if test "x$with_isl" = xno ||
1709    test "x$gcc_cv_isl" = xno; then
1710   noconfigdirs="$noconfigdirs isl"
1711   islinc=
1712 fi
1713
1714 AC_SUBST(isllibs)
1715 AC_SUBST(islinc)
1716
1717 # Check for LTO support.
1718 AC_ARG_ENABLE(lto,
1719 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1720 enable_lto=$enableval,
1721 enable_lto=yes; default_enable_lto=yes)
1722
1723 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1724   build_lto_plugin=yes
1725 ],[if test x"$default_enable_lto" = x"yes" ; then
1726     case $target in
1727       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1728       # On other non-ELF platforms, LTO has yet to be validated.
1729       *) enable_lto=no ;;
1730     esac
1731   else
1732   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1733   # It would also be nice to check the binutils support, but we don't
1734   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1735   # warn during gcc/ subconfigure; unless you're bootstrapping with
1736   # -flto it won't be needed until after installation anyway.
1737     case $target in
1738       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1739       *) if test x"$enable_lto" = x"yes"; then
1740         AC_MSG_ERROR([LTO support is not enabled for this target.])
1741         fi
1742       ;;
1743     esac
1744   fi
1745   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1746   # Build it unless LTO was explicitly disabled.
1747   case $target in
1748     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1749     *) ;;
1750   esac
1751 ])
1752
1753 AC_ARG_ENABLE(linker-plugin-configure-flags,
1754   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1755     [additional flags for configuring linker plugins @<:@none@:>@])],
1756   extra_linker_plugin_configure_flags=$enableval,
1757   extra_linker_plugin_configure_flags=)
1758 AC_SUBST(extra_linker_plugin_configure_flags)
1759 AC_ARG_ENABLE(linker-plugin-flags,
1760   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1761     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1762   extra_linker_plugin_flags=$enableval,
1763   extra_linker_plugin_flags=)
1764 AC_SUBST(extra_linker_plugin_flags)
1765
1766 # Enable --enable-host-shared.
1767 # Checked early to determine whether jit is an 'all' language
1768 AC_ARG_ENABLE(host-shared,
1769 [AS_HELP_STRING([--enable-host-shared],
1770                 [build host code as shared libraries])],
1771 [host_shared=$enableval], [host_shared=no])
1772 AC_SUBST(host_shared)
1773
1774 # By default, C and C++ are the only stage 1 languages.
1775 stage1_languages=,c,
1776
1777 # Target libraries that we bootstrap.
1778 bootstrap_target_libs=,target-libgcc,
1779
1780 # Figure out what language subdirectories are present.
1781 # Look if the user specified --enable-languages="..."; if not, use
1782 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1783 # go away some day.
1784 # NB:  embedded tabs in this IF block -- do not untabify
1785 if test -d ${srcdir}/gcc; then
1786   if test x"${enable_languages+set}" != xset; then
1787     if test x"${LANGUAGES+set}" = xset; then
1788       enable_languages="${LANGUAGES}"
1789         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1790     else
1791       enable_languages=default
1792     fi
1793   else
1794     if test x"${enable_languages}" = x ||
1795        test x"${enable_languages}" = xyes;
1796        then
1797       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1798       exit 1
1799     fi
1800   fi
1801   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1802
1803   # 'f95' is the old name for the 'fortran' language. We issue a warning
1804   # and make the substitution.
1805   case ,${enable_languages}, in
1806     *,f95,*)
1807       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1808       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1809       ;;
1810   esac
1811
1812   # If bootstrapping, C++ must be enabled.
1813   case ",$enable_languages,:$enable_bootstrap" in
1814     *,c++,*:*) ;;
1815     *:yes)
1816       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1817         enable_languages="${enable_languages},c++"
1818       else
1819         AC_MSG_ERROR([bootstrapping requires c++ sources])
1820       fi
1821       ;;
1822   esac
1823
1824   # First scan to see if an enabled language requires some other language.
1825   # We assume that a given config-lang.in will list all the language
1826   # front ends it requires, even if some are required indirectly.
1827   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1828     case ${lang_frag} in
1829       ..) ;;
1830       # The odd quoting in the next line works around
1831       # an apparent bug in bash 1.12 on linux.
1832       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1833       *)
1834         # From the config-lang.in, get $language, $lang_requires, and
1835         # $lang_requires_boot_languages.
1836         language=
1837         lang_requires=
1838         lang_requires_boot_languages=
1839         # set srcdir during sourcing lang_frag to the gcc dir.
1840         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
1841         # polutes this shell
1842         saved_srcdir=${srcdir}
1843         srcdir=${srcdir}/gcc . ${lang_frag}
1844         srcdir=${saved_srcdir}
1845         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1846           case ,${enable_languages}, in
1847             *,$other,*) ;;
1848             *,default,*) ;;
1849             *,all,*) ;;
1850             *,$language,*)
1851               echo " \`$other' language required by \`$language'; enabling" 1>&2
1852               enable_languages="${enable_languages},${other}"
1853               ;;
1854           esac
1855         done
1856         for other in ${lang_requires_boot_languages} ; do
1857           if test "$other" != "c"; then
1858             case ,${enable_stage1_languages}, in
1859               *,$other,*) ;;
1860               *,default,*) ;;
1861               *,all,*) ;;
1862               *)
1863                 case ,${enable_languages}, in
1864                   *,$language,*)
1865                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1866                     enable_stage1_languages="$enable_stage1_languages,${other}"
1867                     ;;
1868                 esac
1869                 ;;
1870             esac
1871           fi
1872         done
1873         ;;
1874     esac
1875   done
1876
1877   new_enable_languages=,c,
1878
1879   # If LTO is enabled, add the LTO front end.
1880   if test "$enable_lto" = "yes" ; then
1881     case ,${enable_languages}, in
1882       *,lto,*) ;;
1883       *) enable_languages="${enable_languages},lto" ;;
1884     esac
1885     if test "${build_lto_plugin}" = "yes" ; then
1886       configdirs="$configdirs lto-plugin"
1887     fi
1888   fi
1889
1890   # If we're building an offloading compiler, add the LTO front end.
1891   if test x"$enable_as_accelerator_for" != x ; then
1892     case ,${enable_languages}, in
1893       *,lto,*) ;;
1894       *) enable_languages="${enable_languages},lto" ;;
1895     esac
1896   fi
1897
1898   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
1899   potential_languages=,c,
1900
1901   enabled_target_libs=
1902   disabled_target_libs=
1903
1904   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1905     case ${lang_frag} in
1906       ..) ;;
1907       # The odd quoting in the next line works around
1908       # an apparent bug in bash 1.12 on linux.
1909       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1910       *)
1911         # From the config-lang.in, get $language, $target_libs,
1912         # $lang_dirs, $boot_language, and $build_by_default
1913         language=
1914         target_libs=
1915         lang_dirs=
1916         subdir_requires=
1917         boot_language=no
1918         build_by_default=yes
1919         # set srcdir during sourcing.  See above about save & restore
1920         saved_srcdir=${srcdir}
1921         srcdir=${srcdir}/gcc . ${lang_frag}
1922         srcdir=${saved_srcdir}
1923         if test x${language} = x; then
1924           echo "${lang_frag} doesn't set \$language." 1>&2
1925           exit 1
1926         fi
1927
1928         if test "$language" = "c++"; then
1929           boot_language=yes
1930         fi
1931
1932         add_this_lang=no
1933         # C is always enabled, so no need to add it again
1934         if test "$language" != "c"; then
1935           case ,${enable_languages}, in
1936             *,${language},*)
1937               # Language was explicitly selected; include it
1938               add_this_lang=yes
1939               ;;
1940             *,all,*)
1941               # All languages are enabled
1942               add_this_lang=all
1943               ;;
1944             *,default,*)
1945               # 'default' was selected, select it if it is a default language
1946               add_this_lang=${build_by_default}
1947               ;;
1948           esac
1949         fi
1950
1951         # Disable languages that need other directories if these aren't available.
1952         for i in $subdir_requires; do
1953           test -f "$srcdir/gcc/$i/config-lang.in" && continue
1954           case ${add_this_lang} in
1955             yes)
1956               # Specifically requested language; tell them.
1957               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
1958               ;;
1959             all)
1960               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
1961               add_this_lang=unsupported
1962               ;;
1963             *)
1964               # Silently disable.
1965               add_this_lang=unsupported
1966               ;;
1967           esac
1968         done
1969
1970         # Disable Ada if no preexisting GNAT is available.
1971         case ${add_this_lang}:${language}:${have_gnat} in
1972           yes:ada:no)
1973             # Specifically requested language; tell them.
1974             AC_MSG_ERROR([GNAT is required to build $language])
1975             ;;
1976           all:ada:no)
1977             AC_MSG_WARN([GNAT is required to build $language])
1978             add_this_lang=unsupported
1979             ;;
1980           *:ada:no)
1981             # Silently disable.
1982             add_this_lang=unsupported
1983             ;;
1984         esac
1985
1986         # Disable jit if -enable-host-shared not specified
1987         case ${add_this_lang}:${language}:${host_shared} in
1988           yes:jit:no)
1989             # PR jit/64780: explicitly specify --enable-host-shared
1990             AC_MSG_ERROR([
1991 Enabling language "jit" requires --enable-host-shared.
1992
1993 --enable-host-shared typically slows the rest of the compiler down by
1994 a few %, so you must explicitly enable it.
1995
1996 If you want to build both the jit and the regular compiler, it is often
1997 best to do this via two separate configure/builds, in separate
1998 directories, to avoid imposing the performance cost of
1999 --enable-host-shared on the regular compiler.])
2000             ;;
2001           all:jit:no)
2002             AC_MSG_WARN([--enable-host-shared required to build $language])
2003             add_this_lang=unsupported
2004             ;;
2005           *:jit:no)
2006             # Silently disable.
2007             add_this_lang=unsupported
2008             ;;
2009         esac
2010
2011         # Disable a language that is unsupported by the target.
2012         case "${add_this_lang}: $unsupported_languages " in
2013           no:*) ;;
2014           unsupported:*) ;;
2015           *:*" $language "*)
2016             AC_MSG_WARN([${language} not supported for this target])
2017             add_this_lang=unsupported
2018             ;;
2019         esac
2020
2021         case $add_this_lang in
2022           unsupported)
2023             # Remove language-dependent dirs.
2024             disabled_target_libs="$disabled_target_libs $target_libs"
2025             noconfigdirs="$noconfigdirs $lang_dirs"
2026             ;;
2027           no)
2028             # Remove language-dependent dirs; still show language as supported.
2029             disabled_target_libs="$disabled_target_libs $target_libs"
2030             noconfigdirs="$noconfigdirs $lang_dirs"
2031             potential_languages="${potential_languages}${language},"
2032             ;;
2033           all|yes)
2034             new_enable_languages="${new_enable_languages}${language},"
2035             potential_languages="${potential_languages}${language},"
2036             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2037             enabled_target_libs="$enabled_target_libs $target_libs"
2038             case "${boot_language}:,$enable_stage1_languages," in
2039               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2040                 # Add to (comma-separated) list of stage 1 languages.
2041                 case ",$stage1_languages," in
2042                   *,$language,* | ,yes, | ,all,) ;;
2043                   *) stage1_languages="${stage1_languages}${language}," ;;
2044                 esac
2045                 # We need to bootstrap any supporting libraries.
2046                 bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
2047                 ;;
2048             esac
2049             ;;
2050         esac
2051         ;;
2052     esac
2053   done
2054
2055   # Add target libraries which are only needed for disabled languages
2056   # to noconfigdirs.
2057   if test -n "$disabled_target_libs"; then
2058     for dir in $disabled_target_libs; do
2059       case " $enabled_target_libs " in
2060       *" ${dir} "*) ;;
2061       *) noconfigdirs="$noconfigdirs $dir" ;;
2062       esac
2063     done
2064   fi
2065
2066   AC_ARG_ENABLE(stage1-languages,
2067   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2068                   [choose additional languages to build during
2069                   stage1.  Mostly useful for compiler development])],
2070   [case ,${enable_stage1_languages}, in
2071     ,no,|,,)
2072       # Set it to something that will have no effect in the loop below
2073       enable_stage1_languages=c ;;
2074     ,yes,)
2075       enable_stage1_languages=`echo $new_enable_languages | \
2076         sed -e "s/^,//" -e "s/,$//" ` ;;
2077     *,all,*)
2078       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2079         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2080   esac
2081
2082   # Add "good" languages from enable_stage1_languages to stage1_languages,
2083   # while "bad" languages go in missing_languages.  Leave no duplicates.
2084   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2085     case $potential_languages in
2086       *,$i,*)
2087         case $stage1_languages in
2088           *,$i,*) ;;
2089           *) stage1_languages="$stage1_languages$i," ;;
2090         esac ;;
2091       *)
2092         case $missing_languages in
2093           *,$i,*) ;;
2094           *) missing_languages="$missing_languages$i," ;;
2095         esac ;;
2096      esac
2097   done])
2098
2099   # Remove leading/trailing commas that were added for simplicity
2100   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2101   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2102   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2103   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2104
2105   if test "x$missing_languages" != x; then
2106     AC_MSG_ERROR([
2107 The following requested languages could not be built: ${missing_languages}
2108 Supported languages are: ${potential_languages}])
2109   fi
2110   if test "x$new_enable_languages" != "x$enable_languages"; then
2111     echo The following languages will be built: ${new_enable_languages}
2112     enable_languages="$new_enable_languages"
2113   fi
2114
2115   AC_SUBST(stage1_languages)
2116   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2117 fi
2118
2119 # Handle --disable-<component> generically.
2120 for dir in $configdirs $build_configdirs $target_configdirs ; do
2121   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2122   varname=`echo $dirname | sed -e s/+/_/g`
2123   if eval test x\${enable_${varname}} "=" xno ; then
2124     noconfigdirs="$noconfigdirs $dir"
2125   fi
2126 done
2127
2128 # Check for Boehm's garbage collector
2129 AC_ARG_ENABLE(objc-gc,
2130 [AS_HELP_STRING([--enable-objc-gc],
2131                 [enable use of Boehm's garbage collector with the
2132                  GNU Objective-C runtime])])
2133 AC_ARG_WITH([target-bdw-gc],
2134 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2135                 [specify prefix directory for installed bdw-gc package.
2136                  Equivalent to --with-target-bdw-gc-include=PATH/include
2137                  plus --with-target-bdw-gc-lib=PATH/lib])])
2138 AC_ARG_WITH([target-bdw-gc-include],
2139 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2140                 [specify directories for installed bdw-gc include files])])
2141 AC_ARG_WITH([target-bdw-gc-lib],
2142 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2143                 [specify directories for installed bdw-gc library])])
2144
2145 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2146   AC_MSG_CHECKING([for bdw garbage collector])
2147   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2148     dnl no bdw-gw options, assume default locations
2149     AC_MSG_RESULT([using bdw-gc in default locations])
2150   else
2151     dnl bdw-gw options, first error checking, complete checking in libobjc
2152     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2153       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2154     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2155       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2156     else
2157       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2158     fi
2159   fi
2160 esac
2161
2162 # Disable libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2163 case ,${enable_languages}, in
2164   *,c++,*)
2165     # Disable libitm, libsanitizer if we're not building libstdc++
2166     case "${noconfigdirs}" in
2167       *target-libstdc++-v3*)
2168         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2169         ;;
2170       *) ;;
2171     esac
2172     ;;
2173   *)
2174     noconfigdirs="$noconfigdirs target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2175     ;;
2176 esac
2177
2178 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2179 # $build_configdirs and $target_configdirs.
2180 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2181
2182 notsupp=""
2183 for dir in . $skipdirs $noconfigdirs ; do
2184   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2185   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2186     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2187     if test -r $srcdir/$dirname/configure ; then
2188       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2189         true
2190       else
2191         notsupp="$notsupp $dir"
2192       fi
2193     fi
2194   fi
2195   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2196     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2197     if test -r $srcdir/$dirname/configure ; then
2198       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2199         true
2200       else
2201         notsupp="$notsupp $dir"
2202       fi
2203     fi
2204   fi
2205   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2206     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2207     if test -r $srcdir/$dirname/configure ; then
2208       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2209         true
2210       else
2211         notsupp="$notsupp $dir"
2212       fi
2213     fi
2214   fi
2215 done
2216
2217 # Quietly strip out all directories which aren't configurable in this tree.
2218 # This relies on all configurable subdirectories being autoconfiscated, which
2219 # is now the case.
2220 build_configdirs_all="$build_configdirs"
2221 build_configdirs=
2222 for i in ${build_configdirs_all} ; do
2223   j=`echo $i | sed -e s/build-//g`
2224   if test -f ${srcdir}/$j/configure ; then
2225     build_configdirs="${build_configdirs} $i"
2226   fi
2227 done
2228
2229 configdirs_all="$configdirs"
2230 configdirs=
2231 for i in ${configdirs_all} ; do
2232   if test -f ${srcdir}/$i/configure ; then
2233     configdirs="${configdirs} $i"
2234   fi
2235 done
2236
2237 target_configdirs_all="$target_configdirs"
2238 target_configdirs=
2239 for i in ${target_configdirs_all} ; do
2240   j=`echo $i | sed -e s/target-//g`
2241   if test -f ${srcdir}/$j/configure ; then
2242     target_configdirs="${target_configdirs} $i"
2243   fi
2244 done
2245
2246 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2247 # so we have to add it after the preceding checks.
2248 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2249 then
2250   case " $configdirs " in
2251     *" libiberty "*)
2252       # If we can build libiberty, we can also build libiberty-linker-plugin.
2253       configdirs="$configdirs libiberty-linker-plugin"
2254       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2255         --with-libiberty=../libiberty-linker-plugin";;
2256     *)
2257       AC_MSG_ERROR([libiberty missing]);;
2258   esac
2259 fi
2260
2261 # Sometimes we have special requirements for the host libiberty.
2262 extra_host_libiberty_configure_flags=
2263 extra_host_zlib_configure_flags=
2264 case " $configdirs " in
2265   *" lto-plugin "* | *" libcc1 "*)
2266     # When these are to be built as shared libraries, the same applies to
2267     # libiberty.
2268     extra_host_libiberty_configure_flags=--enable-shared
2269     ;;
2270   *" bfd "*)
2271     # When bfd is to be built as a shared library, the same applies to
2272     # zlib.
2273     if test "$enable_shared" = "yes"; then
2274       extra_host_zlib_configure_flags=--enable-host-shared
2275     fi
2276     ;;
2277 esac
2278 AC_SUBST(extra_host_libiberty_configure_flags)
2279 AC_SUBST(extra_host_zlib_configure_flags)
2280
2281 # Produce a warning message for the subdirs we can't configure.
2282 # This isn't especially interesting in the Cygnus tree, but in the individual
2283 # FSF releases, it's important to let people know when their machine isn't
2284 # supported by the one or two programs in a package.
2285
2286 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2287   # If $appdirs is non-empty, at least one of those directories must still
2288   # be configured, or we error out.  (E.g., if the gas release supports a
2289   # specified target in some subdirs but not the gas subdir, we shouldn't
2290   # pretend that all is well.)
2291   if test -n "$appdirs" ; then
2292     for dir in $appdirs ; do
2293       if test -r $dir/Makefile.in ; then
2294         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2295           appdirs=""
2296           break
2297         fi
2298         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2299           appdirs=""
2300           break
2301         fi
2302       fi
2303     done
2304     if test -n "$appdirs" ; then
2305       echo "*** This configuration is not supported by this package." 1>&2
2306       exit 1
2307     fi
2308   fi
2309   # Okay, some application will build, or we don't care to check.  Still
2310   # notify of subdirs not getting built.
2311   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2312   echo "    ${notsupp}" 1>&2
2313   echo "    (Any other directories should still work fine.)" 1>&2
2314 fi
2315
2316 case "$host" in
2317   *msdosdjgpp*)
2318     enable_gdbtk=no ;;
2319 esac
2320
2321 # To find our prefix, in gcc_cv_tool_prefix.
2322 ACX_TOOL_DIRS
2323
2324 copy_dirs=
2325
2326 AC_ARG_WITH([build-sysroot],
2327   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2328                   [use sysroot as the system root during the build])],
2329   [if test x"$withval" != x ; then
2330      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2331    fi],
2332   [SYSROOT_CFLAGS_FOR_TARGET=])
2333 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2334
2335 AC_ARG_WITH([debug-prefix-map],
2336   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2337                   [map A to B, C to D ... in debug information])],
2338   [if test x"$withval" != x; then
2339      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2340      for debug_map in $withval; do
2341        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2342      done
2343    fi],
2344   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2345 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2346
2347 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2348 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2349 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2350 # We want to ensure that TARGET libraries (which we know are built with
2351 # gcc) are built with "-O2 -g", so include those options when setting
2352 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2353 if test "x$CFLAGS_FOR_TARGET" = x; then
2354   if test "x${is_cross_compiler}" = xyes; then
2355     CFLAGS_FOR_TARGET="-g -O2"
2356   else
2357     CFLAGS_FOR_TARGET=$CFLAGS
2358     case " $CFLAGS " in
2359       *" -O2 "*) ;;
2360       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2361     esac
2362     case " $CFLAGS " in
2363       *" -g "* | *" -g3 "*) ;;
2364       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2365     esac
2366   fi
2367 fi
2368 AC_SUBST(CFLAGS_FOR_TARGET)
2369
2370 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2371   if test "x${is_cross_compiler}" = xyes; then
2372     CXXFLAGS_FOR_TARGET="-g -O2"
2373   else
2374     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2375     case " $CXXFLAGS " in
2376       *" -O2 "*) ;;
2377       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2378     esac
2379     case " $CXXFLAGS " in
2380       *" -g "* | *" -g3 "*) ;;
2381       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2382     esac
2383   fi
2384 fi
2385 AC_SUBST(CXXFLAGS_FOR_TARGET)
2386
2387 AC_SUBST(LDFLAGS_FOR_TARGET)
2388
2389 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2390 # the named directory are copied to $(tooldir)/sys-include.
2391 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2392   if test x${is_cross_compiler} = xno ; then
2393     echo 1>&2 '***' --with-headers is only supported when cross compiling
2394     exit 1
2395   fi
2396   if test x"${with_headers}" != xyes ; then
2397     x=${gcc_cv_tool_prefix}
2398     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2399   fi
2400 fi
2401
2402 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2403 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2404 # are permitted.
2405 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2406   if test x${is_cross_compiler} = xno ; then
2407     echo 1>&2 '***' --with-libs is only supported when cross compiling
2408     exit 1
2409   fi
2410   if test x"${with_libs}" != xyes ; then
2411     # Copy the libraries in reverse order, so that files in the first named
2412     # library override files in subsequent libraries.
2413     x=${gcc_cv_tool_prefix}
2414     for l in ${with_libs}; do
2415       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2416     done
2417   fi
2418 fi
2419
2420 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2421 #
2422 # This is done by determining whether or not the appropriate directory
2423 # is available, and by checking whether or not specific configurations
2424 # have requested that this magic not happen.
2425 #
2426 # The command line options always override the explicit settings in
2427 # configure.ac, and the settings in configure.ac override this magic.
2428 #
2429 # If the default for a toolchain is to use GNU as and ld, and you don't
2430 # want to do that, then you should use the --without-gnu-as and
2431 # --without-gnu-ld options for the configure script.  Similarly, if
2432 # the default is to use the included zlib and you don't want to do that,
2433 # you should use the --with-system-zlib option for the configure script.
2434
2435 if test x${use_gnu_as} = x &&
2436    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2437   with_gnu_as=yes
2438   extra_host_args="$extra_host_args --with-gnu-as"
2439 fi
2440
2441 if test x${use_gnu_ld} = x &&
2442    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2443   with_gnu_ld=yes
2444   extra_host_args="$extra_host_args --with-gnu-ld"
2445 fi
2446
2447 if test x${use_included_zlib} = x &&
2448    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2449   :
2450 else
2451   with_system_zlib=yes
2452   extra_host_args="$extra_host_args --with-system-zlib"
2453 fi
2454
2455 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2456 # can detect this case.
2457
2458 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2459   with_newlib=yes
2460   extra_host_args="$extra_host_args --with-newlib"
2461 fi
2462
2463 # Handle ${copy_dirs}
2464 set fnord ${copy_dirs}
2465 shift
2466 while test $# != 0 ; do
2467   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2468     :
2469   else
2470     echo Copying $1 to $2
2471
2472     # Use the install script to create the directory and all required
2473     # parent directories.
2474     if test -d $2 ; then
2475       :
2476     else
2477       echo >config.temp
2478       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2479     fi
2480
2481     # Copy the directory, assuming we have tar.
2482     # FIXME: Should we use B in the second tar?  Not all systems support it.
2483     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2484
2485     # It is the responsibility of the user to correctly adjust all
2486     # symlinks.  If somebody can figure out how to handle them correctly
2487     # here, feel free to add the code.
2488
2489     echo $1 > $2/COPIED
2490   fi
2491   shift; shift
2492 done
2493
2494 # Determine a target-dependent exec_prefix that the installed
2495 # gcc will search in.  Keep this list sorted by triplet, with
2496 # the *-*-osname triplets last.
2497 md_exec_prefix=
2498 case "${target}" in
2499   i[[34567]]86-pc-msdosdjgpp*)
2500     md_exec_prefix=/dev/env/DJDIR/bin
2501     ;;
2502   *-*-hpux* | \
2503   *-*-nto-qnx* | \
2504   *-*-solaris2*)
2505     md_exec_prefix=/usr/ccs/bin
2506     ;;
2507 esac
2508
2509 extra_arflags_for_target=
2510 extra_nmflags_for_target=
2511 extra_ranlibflags_for_target=
2512 target_makefile_frag=/dev/null
2513 case "${target}" in
2514   spu-*-*)
2515     target_makefile_frag="config/mt-spu"
2516     ;;
2517   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2518     target_makefile_frag="config/mt-sde"
2519     ;;
2520   mipsisa*-*-elfoabi*)
2521     target_makefile_frag="config/mt-mips-elfoabi"
2522     ;;
2523   mips*-*-*linux* | mips*-*-gnu*)
2524     target_makefile_frag="config/mt-mips-gnu"
2525     ;;
2526   nios2-*-elf*)
2527     target_makefile_frag="config/mt-nios2-elf"
2528     ;;
2529   *-*-linux-android*)
2530     target_makefile_frag="config/mt-android"
2531     ;;
2532   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2533     target_makefile_frag="config/mt-gnu"
2534     ;;
2535   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2536     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2537     # commands to handle both 32-bit and 64-bit objects.  These flags are
2538     # harmless if we're using GNU nm or ar.
2539     extra_arflags_for_target=" -X32_64"
2540     extra_nmflags_for_target=" -B -X32_64"
2541     ;;
2542 esac
2543
2544 alphaieee_frag=/dev/null
2545 case $target in
2546   alpha*-*-*)
2547     # This just makes sure to use the -mieee option to build target libs.
2548     # This should probably be set individually by each library.
2549     alphaieee_frag="config/mt-alphaieee"
2550     ;;
2551 esac
2552
2553 # If --enable-target-optspace always use -Os instead of -O2 to build
2554 # the target libraries, similarly if it is not specified, use -Os
2555 # on selected platforms.
2556 ospace_frag=/dev/null
2557 case "${enable_target_optspace}:${target}" in
2558   yes:*)
2559     ospace_frag="config/mt-ospace"
2560     ;;
2561   :d30v-*)
2562     ospace_frag="config/mt-d30v"
2563     ;;
2564   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2565     ospace_frag="config/mt-ospace"
2566     ;;
2567   no:* | :*)
2568     ;;
2569   *)
2570     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2571     ;;
2572 esac
2573
2574 # Some systems (e.g., one of the i386-aix systems the gas testers are
2575 # using) don't handle "\$" correctly, so don't use it here.
2576 tooldir='${exec_prefix}'/${target_noncanonical}
2577 build_tooldir=${tooldir}
2578
2579 # Create a .gdbinit file which runs the one in srcdir
2580 # and tells GDB to look there for source files.
2581
2582 if test -r ${srcdir}/.gdbinit ; then
2583   case ${srcdir} in
2584     .) ;;
2585     *) cat > ./.gdbinit <<EOF
2586 # ${NO_EDIT}
2587 dir ${srcdir}
2588 dir .
2589 source ${srcdir}/.gdbinit
2590 EOF
2591     ;;
2592   esac
2593 fi
2594
2595 # Make sure that the compiler is able to generate an executable.  If it
2596 # can't, we are probably in trouble.  We don't care whether we can run the
2597 # executable--we might be using a cross compiler--we only care whether it
2598 # can be created.  At this point the main configure script has set CC.
2599 we_are_ok=no
2600 echo "int main () { return 0; }" > conftest.c
2601 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2602 if test $? = 0 ; then
2603   if test -s conftest || test -s conftest.exe ; then
2604     we_are_ok=yes
2605   fi
2606 fi
2607 case $we_are_ok in
2608   no)
2609     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2610     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2611     rm -f conftest*
2612     exit 1
2613     ;;
2614 esac
2615 rm -f conftest*
2616
2617 # Decide which environment variable is used to find dynamic libraries.
2618 case "${host}" in
2619   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2620   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2621   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2622   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2623 esac
2624
2625 # On systems where the dynamic library environment variable is PATH,
2626 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2627 # built executables to PATH.
2628 if test "$RPATH_ENVVAR" = PATH; then
2629   GCC_SHLIB_SUBDIR=/shlib
2630 else
2631   GCC_SHLIB_SUBDIR=
2632 fi
2633
2634 # Adjust the toplevel makefile according to whether bootstrap was selected.
2635 case $enable_bootstrap in
2636   yes)
2637     bootstrap_suffix=bootstrap
2638     BUILD_CONFIG=bootstrap-debug
2639     ;;
2640   no)
2641     bootstrap_suffix=no-bootstrap
2642     BUILD_CONFIG=
2643     ;;
2644 esac
2645
2646 AC_MSG_CHECKING(for default BUILD_CONFIG)
2647
2648 AC_ARG_WITH([build-config],
2649   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2650                   [use config/NAME.mk build configuration])],
2651   [case $with_build_config in
2652    yes) with_build_config= ;;
2653    no) with_build_config= BUILD_CONFIG= ;;
2654    esac])
2655
2656 if test "x${with_build_config}" != x; then
2657   BUILD_CONFIG=$with_build_config
2658 else
2659   case $BUILD_CONFIG in
2660   bootstrap-debug)
2661     if echo "int f (void) { return 0; }" > conftest.c &&
2662        ${CC} -c conftest.c &&
2663        mv conftest.o conftest.o.g0 &&
2664        ${CC} -c -g conftest.c &&
2665        mv conftest.o conftest.o.g &&
2666        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2667       :
2668     else
2669       BUILD_CONFIG=
2670     fi
2671     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2672     ;;
2673   esac
2674 fi
2675 AC_MSG_RESULT($BUILD_CONFIG)
2676 AC_SUBST(BUILD_CONFIG)
2677
2678 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2679 AC_MSG_CHECKING([for --enable-vtable-verify])
2680 AC_ARG_ENABLE(vtable-verify,
2681 [AS_HELP_STRING([--enable-vtable-verify],
2682                 [Enable vtable verification feature])],
2683 [case "$enableval" in
2684  yes) enable_vtable_verify=yes ;;
2685  no)  enable_vtable_verify=no ;;
2686  *)   enable_vtable_verify=no;;
2687  esac],
2688 [enable_vtable_verify=no])
2689 AC_MSG_RESULT($enable_vtable_verify)
2690
2691 # Record target_configdirs and the configure arguments for target and
2692 # build configuration in Makefile.
2693 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2694 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2695 bootstrap_fixincludes=no
2696
2697 # If we are building libgomp, bootstrap it.
2698 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2699   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2700 fi
2701
2702 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2703 # or bootstrap-ubsan, bootstrap it.
2704 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2705   case "$BUILD_CONFIG" in
2706     *bootstrap-asan* | *bootstrap-ubsan* )
2707       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2708       bootstrap_fixincludes=yes
2709       ;;
2710   esac
2711 fi
2712
2713 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2714 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2715    test "$enable_vtable_verify" != no; then
2716   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2717 fi
2718
2719 # Determine whether gdb needs tk/tcl or not.
2720 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2721 # and in that case we want gdb to be built without tk.  Ugh!
2722 # In fact I believe gdb is the *only* package directly dependent on tk,
2723 # so we should be able to put the 'maybe's in unconditionally and
2724 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2725 # 100% sure that that's safe though.
2726
2727 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2728 case "$enable_gdbtk" in
2729   no)
2730     GDB_TK="" ;;
2731   yes)
2732     GDB_TK="${gdb_tk}" ;;
2733   *)
2734     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2735     # distro.  Eventually someone will fix this and move Insight, nee
2736     # gdbtk to a separate directory.
2737     if test -d ${srcdir}/gdb/gdbtk ; then
2738       GDB_TK="${gdb_tk}"
2739     else
2740       GDB_TK=""
2741     fi
2742     ;;
2743 esac
2744 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2745 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2746
2747 # Strip out unwanted targets.
2748
2749 # While at that, we remove Makefiles if we were started for recursive
2750 # configuration, so that the top-level Makefile reconfigures them,
2751 # like we used to do when configure itself was recursive.
2752
2753 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2754 # but now we're fixing up the Makefile ourselves with the additional
2755 # commands passed to AC_CONFIG_FILES.  Use separate variables
2756 # extrasub-{build,host,target} not because there is any reason to split
2757 # the substitutions up that way, but only to remain below the limit of
2758 # 99 commands in a script, for HP-UX sed.
2759
2760 # Do not nest @if/@endif or @unless/@endunless pairs, because
2761 # configure will not warn you at all.
2762
2763 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2764   yes:yes:*\ gold\ *:*,c++,*) ;;
2765   yes:yes:*\ gold\ *:*)
2766     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2767     ;;
2768 esac
2769
2770 extrasub_build=
2771 for module in ${build_configdirs} ; do
2772   if test -z "${no_recursion}" \
2773      && test -f ${build_subdir}/${module}/Makefile; then
2774     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2775     rm -f ${build_subdir}/${module}/Makefile
2776   fi
2777   extrasub_build="$extrasub_build
2778 /^@if build-$module\$/d
2779 /^@endif build-$module\$/d
2780 /^@unless build-$module\$/,/^@endunless build-$module\$/d
2781 /^@if build-$module-$bootstrap_suffix\$/d
2782 /^@endif build-$module-$bootstrap_suffix\$/d
2783 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
2784 done
2785 extrasub_host=
2786 for module in ${configdirs} ; do
2787   if test -z "${no_recursion}"; then
2788     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2789       if test -f ${file}; then
2790         echo 1>&2 "*** removing ${file} to force reconfigure"
2791         rm -f ${file}
2792       fi
2793     done
2794   fi
2795   case ${module},${bootstrap_fixincludes} in
2796     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2797     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2798   esac
2799   extrasub_host="$extrasub_host
2800 /^@if $module\$/d
2801 /^@endif $module\$/d
2802 /^@unless $module\$/,/^@endunless $module\$/d
2803 /^@if $module-$host_bootstrap_suffix\$/d
2804 /^@endif $module-$host_bootstrap_suffix\$/d
2805 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
2806 done
2807 extrasub_target=
2808 for module in ${target_configdirs} ; do
2809   if test -z "${no_recursion}" \
2810      && test -f ${target_subdir}/${module}/Makefile; then
2811     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2812     rm -f ${target_subdir}/${module}/Makefile
2813   fi
2814
2815   # We only bootstrap target libraries listed in bootstrap_target_libs.
2816   case $bootstrap_target_libs in
2817     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2818     *) target_bootstrap_suffix=no-bootstrap ;;
2819   esac
2820
2821   extrasub_target="$extrasub_target
2822 /^@if target-$module\$/d
2823 /^@endif target-$module\$/d
2824 /^@unless target-$module\$/,/^@endunless target-$module\$/d
2825 /^@if target-$module-$target_bootstrap_suffix\$/d
2826 /^@endif target-$module-$target_bootstrap_suffix\$/d
2827 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
2828 done
2829
2830 # Do the final fixup along with target modules.
2831 extrasub_target="$extrasub_target
2832 /^@if /,/^@endif /d
2833 /^@unless /d
2834 /^@endunless /d"
2835
2836 # Create the serialization dependencies.  This uses a temporary file.
2837
2838 AC_ARG_ENABLE([serial-configure],
2839 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
2840                 [force sequential configuration of
2841                  sub-packages for the host, target or build
2842                  machine, or all sub-packages])])
2843
2844 case ${enable_serial_configure} in
2845   yes)
2846     enable_serial_build_configure=yes
2847     enable_serial_host_configure=yes
2848     enable_serial_target_configure=yes
2849     ;;
2850 esac
2851
2852 # These force 'configure's to be done one at a time, to avoid problems
2853 # with contention over a shared config.cache.
2854 rm -f serdep.tmp
2855 echo '# serdep.tmp' > serdep.tmp
2856 olditem=
2857 test "x${enable_serial_build_configure}" = xyes &&
2858 for item in ${build_configdirs} ; do
2859   case ${olditem} in
2860     "") ;;
2861     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
2862   esac
2863   olditem=${item}
2864 done
2865 olditem=
2866 test "x${enable_serial_host_configure}" = xyes &&
2867 for item in ${configdirs} ; do
2868   case ${olditem} in
2869     "") ;;
2870     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
2871   esac
2872   olditem=${item}
2873 done
2874 olditem=
2875 test "x${enable_serial_target_configure}" = xyes &&
2876 for item in ${target_configdirs} ; do
2877   case ${olditem} in
2878     "") ;;
2879     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
2880   esac
2881   olditem=${item}
2882 done
2883 serialization_dependencies=serdep.tmp
2884 AC_SUBST_FILE(serialization_dependencies)
2885
2886 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
2887 # target, nonopt, and variable assignments.  These are the ones we
2888 # might not want to pass down to subconfigures.  The exception being
2889 # --cache-file=/dev/null, which is used to turn off the use of cache
2890 # files altogether, and which should be passed on to subconfigures.
2891 # Also strip program-prefix, program-suffix, and program-transform-name,
2892 # so that we can pass down a consistent program-transform-name.
2893 baseargs=
2894 tbaseargs=
2895 keep_next=no
2896 skip_next=no
2897 eval "set -- $ac_configure_args"
2898 for ac_arg
2899 do
2900   if test X"$skip_next" = X"yes"; then
2901     skip_next=no
2902     continue
2903   fi
2904   if test X"$keep_next" = X"yes"; then
2905     case $ac_arg in
2906       *\'*)
2907         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2908     esac
2909     baseargs="$baseargs '$ac_arg'"
2910     tbaseargs="$tbaseargs '$ac_arg'"
2911     keep_next=no
2912     continue
2913   fi
2914
2915   # Handle separated arguments.  Based on the logic generated by
2916   # autoconf 2.59.
2917   case $ac_arg in
2918     *=* | --config-cache | -C | -disable-* | --disable-* \
2919       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
2920       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
2921       | -with-* | --with-* | -without-* | --without-* | --x)
2922       separate_arg=no
2923       ;;
2924     -*)
2925       separate_arg=yes
2926       ;;
2927     *)
2928       separate_arg=no
2929       ;;
2930   esac
2931
2932   skip_targ=no
2933   case $ac_arg in
2934 changequote(,)
2935   --with-* | --without-*)
2936     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
2937
2938     case $libopt in
2939     *[-_]include)
2940       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
2941       ;;
2942     *[-_]lib)
2943       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
2944       ;;
2945     *)
2946       lib=$libopt
2947       ;;
2948     esac
2949 changequote([,])
2950
2951     case $lib in
2952     mpc | mpfr | gmp | isl)
2953       # If we're processing --with-$lib, --with-$lib-include or
2954       # --with-$lib-lib, for one of the libs above, and target is
2955       # different from host, don't pass the current argument to any
2956       # target library's configure.
2957       if test x$is_cross_compiler = xyes; then
2958         skip_targ=yes
2959       fi
2960       ;;
2961     esac
2962     ;;
2963   esac
2964
2965   case "$ac_arg" in
2966     --cache-file=/dev/null | \
2967     -cache-file=/dev/null )
2968       # Handled here to avoid the test to skip args below.
2969       baseargs="$baseargs '$ac_arg'"
2970       tbaseargs="$tbaseargs '$ac_arg'"
2971       # Assert: $separate_arg should always be no.
2972       keep_next=$separate_arg
2973       ;;
2974     --no*)
2975       continue
2976       ;;
2977     --c* | \
2978     --sr* | \
2979     --ho* | \
2980     --bu* | \
2981     --t* | \
2982     --program-* | \
2983     -cache_file* | \
2984     -srcdir* | \
2985     -host* | \
2986     -build* | \
2987     -target* | \
2988     -program-prefix* | \
2989     -program-suffix* | \
2990     -program-transform-name* )
2991       skip_next=$separate_arg
2992       continue
2993       ;;
2994     -*)
2995       # An option.  Add it.
2996       case $ac_arg in
2997         *\'*)
2998           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2999       esac
3000       baseargs="$baseargs '$ac_arg'"
3001       if test X"$skip_targ" = Xno; then
3002         tbaseargs="$tbaseargs '$ac_arg'"
3003       fi
3004       keep_next=$separate_arg
3005       ;;
3006     *)
3007       # Either a variable assignment, or a nonopt (triplet).  Don't
3008       # pass it down; let the Makefile handle this.
3009       continue
3010       ;;
3011   esac
3012 done
3013 # Remove the initial space we just introduced and, as these will be
3014 # expanded by make, quote '$'.
3015 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3016
3017 # Add in --program-transform-name, after --program-prefix and
3018 # --program-suffix have been applied to it.  Autoconf has already
3019 # doubled dollar signs and backslashes in program_transform_name; we want
3020 # the backslashes un-doubled, and then the entire thing wrapped in single
3021 # quotes, because this will be expanded first by make and then by the shell.
3022 # Also, because we want to override the logic in subdir configure scripts to
3023 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3024 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3025 ${program_transform_name}
3026 EOF_SED
3027 gcc_transform_name=`cat conftestsed.out`
3028 rm -f conftestsed.out
3029 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3030 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3031 if test "$silent" = yes; then
3032   baseargs="$baseargs --silent"
3033   tbaseargs="$tbaseargs --silent"
3034 fi
3035 baseargs="$baseargs --disable-option-checking"
3036 tbaseargs="$tbaseargs --disable-option-checking"
3037
3038 # Record and document user additions to sub configure arguments.
3039 AC_ARG_VAR([build_configargs],
3040            [additional configure arguments for build directories])
3041 AC_ARG_VAR([host_configargs],
3042            [additional configure arguments for host directories])
3043 AC_ARG_VAR([target_configargs],
3044            [additional configure arguments for target directories])
3045
3046 # For the build-side libraries, we just need to pretend we're native,
3047 # and not use the same cache file.  Multilibs are neither needed nor
3048 # desired.  We can't even use the same cache file for all build-side
3049 # libraries, as they're compiled differently; some with C, some with
3050 # C++ or with different feature-enabling options.
3051 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3052
3053 # For host modules, accept cache file option, or specification as blank.
3054 case "${cache_file}" in
3055 "") # empty
3056   cache_file_option="" ;;
3057 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3058   cache_file_option="--cache-file=${cache_file}" ;;
3059 *) # relative path
3060   cache_file_option="--cache-file=../${cache_file}" ;;
3061 esac
3062
3063 # Host dirs don't like to share a cache file either, horribly enough.
3064 # This seems to be due to autoconf 2.5x stupidity.
3065 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3066
3067 target_configargs="$target_configargs ${tbaseargs}"
3068
3069 # Passing a --with-cross-host argument lets the target libraries know
3070 # whether they are being built with a cross-compiler or being built
3071 # native.  However, it would be better to use other mechanisms to make the
3072 # sorts of decisions they want to make on this basis.  Please consider
3073 # this option to be deprecated.  FIXME.
3074 if test x${is_cross_compiler} = xyes ; then
3075   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3076 fi
3077
3078 # Special user-friendly check for native x86_64-linux build, if
3079 # multilib is not explicitly enabled.
3080 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3081   x86_64-*linux*:yes:$build:$build:)
3082     # Make sure we have a development environment that handles 32-bit
3083     dev64=no
3084     echo "int main () { return 0; }" > conftest.c
3085     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3086     if test $? = 0 ; then
3087       if test -s conftest || test -s conftest.exe ; then
3088         dev64=yes
3089       fi
3090     fi
3091     rm -f conftest*
3092     if test x${dev64} != xyes ; then
3093       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.])
3094     fi
3095     ;;
3096 esac
3097
3098 # Default to --enable-multilib.
3099 if test x${enable_multilib} = x ; then
3100   target_configargs="--enable-multilib ${target_configargs}"
3101 fi
3102
3103 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3104 # changed from the earlier setting of with_newlib.
3105 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3106   target_configargs="--with-newlib ${target_configargs}"
3107 fi
3108
3109 # Different target subdirs use different values of certain variables
3110 # (notably CXX).  Worse, multilibs use *lots* of different values.
3111 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3112 # it doesn't automatically accept command-line overrides of them.
3113 # This means it's not safe for target subdirs to share a cache file,
3114 # which is disgusting, but there you have it.  Hopefully this can be
3115 # fixed in future.  It's still worthwhile to use a cache file for each
3116 # directory.  I think.
3117
3118 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3119 # We need to pass --target, as newer autoconf's requires consistency
3120 # for target_alias and gcc doesn't manage it consistently.
3121 target_configargs="--cache-file=./config.cache ${target_configargs}"
3122
3123 FLAGS_FOR_TARGET=
3124 case " $target_configdirs " in
3125  *" newlib "*)
3126   case " $target_configargs " in
3127   *" --with-newlib "*)
3128    case "$target" in
3129     *-cygwin*)
3130       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3131       ;;
3132    esac
3133
3134    # If we're not building GCC, don't discard standard headers.
3135    if test -d ${srcdir}/gcc; then
3136      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3137
3138      if test "${build}" != "${host}"; then
3139        # On Canadian crosses, CC_FOR_TARGET will have already been set
3140        # by `configure', so we won't have an opportunity to add -Bgcc/
3141        # to it.  This is right: we don't want to search that directory
3142        # for binaries, but we want the header files in there, so add
3143        # them explicitly.
3144        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3145
3146        # Someone might think of using the pre-installed headers on
3147        # Canadian crosses, in case the installed compiler is not fully
3148        # compatible with the compiler being built.  In this case, it
3149        # would be better to flag an error than risking having
3150        # incompatible object files being constructed.  We can't
3151        # guarantee that an error will be flagged, but let's hope the
3152        # compiler will do it, when presented with incompatible header
3153        # files.
3154      fi
3155    fi
3156
3157    case "${target}-${is_cross_compiler}" in
3158    i[[3456789]]86-*-linux*-no)
3159       # Here host == target, so we don't need to build gcc,
3160       # so we don't want to discard standard headers.
3161       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3162       ;;
3163    *)
3164       # If we're building newlib, use its generic headers last, but search
3165       # for any libc-related directories first (so make it the last -B
3166       # switch).
3167       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3168
3169       # If we're building libgloss, find the startup file, simulator library
3170       # and linker script.
3171       case " $target_configdirs " in
3172         *" libgloss "*)
3173         # Look for startup file, simulator library and maybe linker script.
3174         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3175         # Look for libnosys.a in case the target needs it.
3176         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3177         # Most targets have the linker script in the source directory.
3178         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3179         ;;
3180       esac
3181       ;;
3182    esac
3183    ;;
3184   esac
3185   ;;
3186 esac
3187
3188 case "$target" in
3189   x86_64-*mingw* | *-w64-mingw*)
3190   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3191   # however, use a symlink named 'mingw' in ${prefix} .
3192     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3193     ;;
3194   *-mingw*)
3195   # MinGW can't be handled as Cygwin above since it does not use newlib.
3196     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3197     ;;
3198 esac
3199
3200 # Allow the user to override the flags for
3201 # our build compiler if desired.
3202 if test x"${build}" = x"${host}" ; then
3203   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3204   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3205   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3206 fi
3207
3208 # On Canadian crosses, we'll be searching the right directories for
3209 # the previously-installed cross compiler, so don't bother to add
3210 # flags for directories within the install tree of the compiler
3211 # being built; programs in there won't even run.
3212 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3213   # Search for pre-installed headers if nothing else fits.
3214   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3215 fi
3216
3217 if test "x${use_gnu_ld}" = x &&
3218    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3219   # Arrange for us to find uninstalled linker scripts.
3220   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3221 fi
3222
3223 # Search for other target-specific linker scripts and such.
3224 case "${target}" in
3225   mep*)
3226     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3227     ;;
3228 esac
3229
3230 # Makefile fragments.
3231 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3232 do
3233   eval fragval=\$$frag
3234   if test $fragval != /dev/null; then
3235     eval $frag=${srcdir}/$fragval
3236   fi
3237 done
3238 AC_SUBST_FILE(host_makefile_frag)
3239 AC_SUBST_FILE(target_makefile_frag)
3240 AC_SUBST_FILE(alphaieee_frag)
3241 AC_SUBST_FILE(ospace_frag)
3242
3243 # Miscellanea: directories, flags, etc.
3244 AC_SUBST(RPATH_ENVVAR)
3245 AC_SUBST(GCC_SHLIB_SUBDIR)
3246 AC_SUBST(tooldir)
3247 AC_SUBST(build_tooldir)
3248 AC_SUBST(CONFIGURE_GDB_TK)
3249 AC_SUBST(GDB_TK)
3250 AC_SUBST(INSTALL_GDB_TK)
3251
3252 # Build module lists & subconfigure args.
3253 AC_SUBST(build_configargs)
3254 AC_SUBST(build_configdirs)
3255
3256 # Host module lists & subconfigure args.
3257 AC_SUBST(host_configargs)
3258 AC_SUBST(configdirs)
3259 AC_SUBST(target_configdirs)
3260
3261 # Target module lists & subconfigure args.
3262 AC_SUBST(target_configargs)
3263
3264
3265 # Build tools.
3266 AC_SUBST(AR_FOR_BUILD)
3267 AC_SUBST(AS_FOR_BUILD)
3268 AC_SUBST(CC_FOR_BUILD)
3269 AC_SUBST(CFLAGS_FOR_BUILD)
3270 AC_SUBST(CXXFLAGS_FOR_BUILD)
3271 AC_SUBST(CXX_FOR_BUILD)
3272 AC_SUBST(DLLTOOL_FOR_BUILD)
3273 AC_SUBST(GFORTRAN_FOR_BUILD)
3274 AC_SUBST(GOC_FOR_BUILD)
3275 AC_SUBST(GDC_FOR_BUILD)
3276 AC_SUBST(LDFLAGS_FOR_BUILD)
3277 AC_SUBST(LD_FOR_BUILD)
3278 AC_SUBST(NM_FOR_BUILD)
3279 AC_SUBST(RANLIB_FOR_BUILD)
3280 AC_SUBST(WINDMC_FOR_BUILD)
3281 AC_SUBST(WINDRES_FOR_BUILD)
3282
3283 # Generate default definitions for YACC, M4, LEX and other programs that run
3284 # on the build machine.  These are used if the Makefile can't locate these
3285 # programs in objdir.
3286 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3287
3288 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3289 case " $build_configdirs " in
3290   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3291 esac
3292
3293 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3294 case " $build_configdirs " in
3295   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3296 esac
3297
3298 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3299 case " $build_configdirs " in
3300   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3301 esac
3302
3303 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3304 case " $build_configdirs " in
3305   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3306   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3307 esac
3308
3309 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3310 case " $build_configdirs " in
3311   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3312 esac
3313
3314 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3315 case " $build_configdirs " in
3316   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3317   *)
3318 changequote(,)
3319     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3320     # higher, else we use the "missing" dummy.
3321     if ${MAKEINFO} --version \
3322        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3323       :
3324     else
3325       MAKEINFO="$MISSING makeinfo"
3326     fi
3327     ;;
3328 changequote([,])
3329 esac
3330
3331 # FIXME: expect and dejagnu may become build tools?
3332
3333 AC_CHECK_PROGS(EXPECT, expect, expect)
3334 case " $configdirs " in
3335   *" expect "*)
3336     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3337     ;;
3338 esac
3339
3340 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3341 case " $configdirs " in
3342   *" dejagnu "*)
3343     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3344     ;;
3345 esac
3346
3347
3348 # Host tools.
3349 NCN_STRICT_CHECK_TOOLS(AR, ar)
3350 NCN_STRICT_CHECK_TOOLS(AS, as)
3351 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3352 NCN_STRICT_CHECK_TOOLS(LD, ld)
3353 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3354 NCN_STRICT_CHECK_TOOLS(NM, nm)
3355 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3356 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3357 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3358 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3359 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3360 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3361 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3362 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3363 AC_SUBST(CC)
3364 AC_SUBST(CXX)
3365 AC_SUBST(CFLAGS)
3366 AC_SUBST(CXXFLAGS)
3367
3368 # Target tools.
3369 AC_ARG_WITH([build-time-tools],
3370   [AS_HELP_STRING([--with-build-time-tools=PATH],
3371                   [use given path to find target tools during the build])],
3372   [case x"$withval" in
3373      x/*) ;;
3374      *)
3375        with_build_time_tools=
3376        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3377        ;;
3378    esac],
3379   [with_build_time_tools=])
3380
3381 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3382 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3383 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3384 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3385 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3386 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3387
3388 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3389 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3390 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3391 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3392 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3393 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3394 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3395 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3396 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3397 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3398 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3399 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3400 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3401 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3402
3403 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3404
3405 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3406 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3407 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3408 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3409 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3410                 [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],
3411                 c++)
3412 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3413                 [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],
3414                 c++)
3415 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3416 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3417 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3418                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3419 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3420                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3421 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3422                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3423 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3424 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3425 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3426 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3427 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3428 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3429 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3430 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3431 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3432 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3433 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3434
3435 AC_SUBST(FLAGS_FOR_TARGET)
3436 AC_SUBST(RAW_CXX_FOR_TARGET)
3437
3438 # Certain tools may need extra flags.
3439 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3440 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3441 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3442
3443 # When building target libraries, except in a Canadian cross, we use
3444 # the same toolchain as the compiler we just built.
3445 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3446 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3447 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3448 if test $host = $build; then
3449   case " $configdirs " in
3450     *" gcc "*)
3451       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3452       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3453       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3454       ;;
3455   esac
3456 fi
3457
3458 AC_SUBST(COMPILER_AS_FOR_TARGET)
3459 AC_SUBST(COMPILER_LD_FOR_TARGET)
3460 AC_SUBST(COMPILER_NM_FOR_TARGET)
3461
3462 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3463 AC_ARG_ENABLE(maintainer-mode,
3464 [AS_HELP_STRING([--enable-maintainer-mode],
3465                 [enable make rules and dependencies not useful
3466                  (and sometimes confusing) to the casual installer])],
3467       USE_MAINTAINER_MODE=$enableval,
3468       USE_MAINTAINER_MODE=no)
3469 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3470 AC_SUBST(MAINTAINER_MODE_TRUE)
3471 AC_SUBST(MAINTAINER_MODE_FALSE)
3472 if test "$USE_MAINTAINER_MODE" = yes; then
3473   MAINTAINER_MODE_TRUE=
3474   MAINTAINER_MODE_FALSE='#'
3475 else
3476   MAINTAINER_MODE_TRUE='#'
3477   MAINTAINER_MODE_FALSE=
3478 fi
3479 MAINT=$MAINTAINER_MODE_TRUE
3480 AC_SUBST(MAINT)dnl
3481
3482 # ---------------------
3483 # GCC bootstrap support
3484 # ---------------------
3485
3486 # Stage specific cflags for build.
3487 stage1_cflags="-g"
3488 case $build in
3489   vax-*-*)
3490     case ${GCC} in
3491       yes) stage1_cflags="-g -Wa,-J" ;;
3492       *) stage1_cflags="-g -J" ;;
3493     esac ;;
3494 esac
3495
3496 AC_SUBST(stage1_cflags)
3497
3498 # Enable --enable-checking in stage1 of the compiler.
3499 AC_ARG_ENABLE(stage1-checking,
3500 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3501                 [choose additional checking for stage1 of the compiler])],
3502 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3503 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3504   # For --disable-checking or implicit --enable-checking=release, avoid
3505   # setting --enable-checking=gc in the default stage1 checking for LTO
3506   # bootstraps.  See PR62077.
3507   case $BUILD_CONFIG in
3508     *lto*)
3509       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3510     *)
3511       stage1_checking=--enable-checking=yes,types;;
3512   esac
3513   if test "x$enable_checking" = x && \
3514      test -d ${srcdir}/gcc && \
3515      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3516     stage1_checking=--enable-checking=yes,types,extra
3517   fi
3518 else
3519   stage1_checking=--enable-checking=$enable_checking,types
3520 fi])
3521 AC_SUBST(stage1_checking)
3522
3523 # Enable -Werror in bootstrap stage2 and later.
3524 AC_ARG_ENABLE(werror,
3525 [AS_HELP_STRING([--enable-werror],
3526                 [enable -Werror in bootstrap stage2 and later])],
3527 [
3528 case ${enable_werror} in
3529   yes) stage2_werror_flag="--enable-werror-always" ;;
3530   *) stage2_werror_flag="" ;;
3531 esac
3532 ],
3533 [
3534 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3535   case $BUILD_CONFIG in
3536   bootstrap-debug)
3537       stage2_werror_flag="--enable-werror-always" ;;
3538   "")
3539       stage2_werror_flag="--enable-werror-always" ;;
3540   esac
3541 fi
3542 ])
3543
3544 AC_SUBST(stage2_werror_flag)
3545
3546 # Specify what files to not compare during bootstrap.
3547
3548 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3549 case "$target" in
3550   hppa*64*-*-hpux*) ;;
3551   hppa*-*-hpux*) compare_exclusions="gcc/cc*-checksum\$(objext) | */libgcc/lib2funcs* | gcc/ada/*tools/* | gcc/function-tests.o" ;;
3552   powerpc*-ibm-aix*) compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/* | *libgomp*\$(objext)" ;;
3553 esac
3554 AC_SUBST(compare_exclusions)
3555
3556 AC_CONFIG_FILES([Makefile],
3557   [sed "$extrasub_build" Makefile |
3558    sed "$extrasub_host" |
3559    sed "$extrasub_target" > mf$$
3560    mv -f mf$$ Makefile],
3561   [extrasub_build="$extrasub_build"
3562    extrasub_host="$extrasub_host"
3563    extrasub_target="$extrasub_target"])
3564 AC_OUTPUT