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, 2019, 2020 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(config/gcc-plugin.m4)
  27 m4_include([libtool.m4])
  28 m4_include([ltoptions.m4])
  29 m4_include([ltsugar.m4])
  30 m4_include([ltversion.m4])
  31 m4_include([lt~obsolete.m4])
  32 m4_include([config/isl.m4])
  33
  34 AC_INIT(move-if-change)
  35 AC_DISABLE_OPTION_CHECKING
  36
  37 progname=$0
  38 # if PWD already has a value, it is probably wrong.
  39 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  40
  41 # Export original configure arguments for use by sub-configures.
  42 # Quote arguments with shell meta charatcers.
  43 TOPLEVEL_CONFIGURE_ARGUMENTS=
  44 set -- "$progname" "$@"
  45 for ac_arg
  46 do
  47   case "$ac_arg" in
  48   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  49     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  50     # if the argument is of the form -foo=baz, quote the baz part only
  51     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  52   *) ;;
  53   esac
  54   # Add the quoted argument to the list.
  55   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  56 done
  57 if test "$silent" = yes; then
  58   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  59 fi
  60 # Remove the initial space we just introduced and, as these will be
  61 # expanded by make, quote '$'.
  62 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  63 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  64
  65 # Find the build, host, and target systems.
  66 ACX_NONCANONICAL_BUILD
  67 ACX_NONCANONICAL_HOST
  68 ACX_NONCANONICAL_TARGET
  69
  70 dnl Autoconf 2.5x and later will set a default program prefix if
  71 dnl --target was used, even if it was the same as --host.  Disable
  72 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  73 dnl to take effect.
  74 test "$host_noncanonical" = "$target_noncanonical" &&
  75   test "$program_prefix$program_suffix$program_transform_name" = \
  76     NONENONEs,x,x, &&
  77   program_transform_name=s,y,y,
  78
  79 AC_CANONICAL_SYSTEM
  80 AC_ARG_PROGRAM
  81
  82 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  83 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  84
  85 # Get 'install' or 'install-sh' and its variants.
  86 AC_PROG_INSTALL
  87 ACX_PROG_LN
  88 AC_PROG_LN_S
  89 AC_PROG_SED
  90 AC_PROG_AWK
  91
  92 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  93
  94 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  95 # a relative path.
  96 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  97   INSTALL="${srcpwd}/install-sh -c"
  98 fi
  99
 100 # Set srcdir to "." if that's what it is.
 101 # This is important for multilib support.
 102 pwd=`${PWDCMD-pwd}`
 103 if test "${pwd}" = "${srcpwd}" ; then
 104   srcdir=.
 105 fi
 106
 107 topsrcdir=$srcpwd
 108
 109 extra_host_args=
 110
 111 ### To add a new directory to the tree, first choose whether it is a target
 112 ### or a host dependent tool.  Then put it into the appropriate list
 113 ### (library or tools, host or target), doing a dependency sort.
 114
 115 # Subdirs will be configured in the order listed in build_configdirs,
 116 # configdirs, or target_configdirs; see the serialization section below.
 117
 118 # Dependency sorting is only needed when *configuration* must be done in
 119 # a particular order.  In all cases a dependency should be specified in
 120 # the Makefile, whether or not it's implicitly specified here.
 121
 122 # Double entries in build_configdirs, configdirs, or target_configdirs may
 123 # cause circular dependencies and break everything horribly.
 124
 125 # these library is used by various programs built for the build
 126 # environment
 127 #
 128 build_libs="build-libiberty build-libcpp"
 129
 130 # these tools are built for the build environment
 131 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 132
 133 # these libraries are used by various programs built for the host environment
 134 #f
 135 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libdecnumber gmp mpfr mpc isl libelf libiconv libctf"
 136
 137 # these tools are built for the host environment
 138 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 139 # know that we are building the simulator.
 140 # binutils, gas and ld appear in that order because it makes sense to run
 141 # "make check" in that particular order.
 142 # If --enable-gold is used, "gold" may replace "ld".
 143 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gdbserver gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools"
 144
 145 # these libraries are built for the target environment, and are built after
 146 # the host libraries and the host tools (which may be a cross compiler)
 147 # Note that libiberty is not a target library.
 148 target_libraries="target-libgcc \
 149                 target-libbacktrace \
 150                 target-libgloss \
 151                 target-newlib \
 152                 target-libgomp \
 153                 target-liboffloadmic \
 154                 target-libhsail-rt \
 155                 target-libatomic \
 156                 target-libitm \
 157                 target-libstdc++-v3 \
 158                 target-libsanitizer \
 159                 target-libvtv \
 160                 target-libssp \
 161                 target-libquadmath \
 162                 target-libgfortran \
 163                 target-libffi \
 164                 target-libobjc \
 165                 target-libada \
 166                 target-libgo"
 167
 168 # these tools are built using the target libraries, and are intended to
 169 # run only in the target environment
 170 #
 171 # note: any program that *uses* libraries that are in the "target_libraries"
 172 # list belongs in this list.
 173 #
 174 target_tools="target-rda"
 175
 176 ################################################################################
 177
 178 ## All tools belong in one of the four categories, and are assigned above
 179 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 180 ## is important because configure will choke if they ever get through.
 181 ## ${configdirs} is directories we build using the host tools.
 182 ## ${target_configdirs} is directories we build using the target tools.
 183 configdirs=`echo ${host_libs} ${host_tools}`
 184 target_configdirs=`echo ${target_libraries} ${target_tools}`
 185 build_configdirs=`echo ${build_libs} ${build_tools}`
 186
 187 m4_divert_text([PARSE_ARGS],
 188 [case $srcdir in
 189   *" "*)
 190 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 191     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 192 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 193     ;;
 194 esac
 195 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 196 ])
 197
 198 ################################################################################
 199
 200 srcname="gnu development package"
 201
 202 # This gets set non-empty for some net releases of packages.
 203 appdirs=""
 204
 205 # Define is_cross_compiler to save on calls to 'test'.
 206 is_cross_compiler=
 207 if test x"${host}" = x"${target}" ; then
 208   is_cross_compiler=no
 209 else
 210   is_cross_compiler=yes
 211 fi
 212
 213 # Find the build and target subdir names.
 214 GCC_TOPLEV_SUBDIRS
 215 # Be sure to cover against remnants of an in-tree build.
 216 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 217   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 218 Use a pristine source tree when building in a separate tree])
 219 fi
 220
 221 # Skipdirs are removed silently.
 222 skipdirs=
 223 # Noconfigdirs are removed loudly.
 224 noconfigdirs=""
 225
 226 use_gnu_ld=
 227 # Make sure we don't let GNU ld be added if we didn't want it.
 228 if test x$with_gnu_ld = xno ; then
 229   use_gnu_ld=no
 230   noconfigdirs="$noconfigdirs ld gold"
 231 fi
 232
 233 use_gnu_as=
 234 # Make sure we don't let GNU as be added if we didn't want it.
 235 if test x$with_gnu_as = xno ; then
 236   use_gnu_as=no
 237   noconfigdirs="$noconfigdirs gas"
 238 fi
 239
 240 use_included_zlib=
 241 AC_ARG_WITH(system-zlib,
 242 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 243 # Make sure we don't let ZLIB be added if we didn't want it.
 244 if test x$with_system_zlib = xyes ; then
 245   use_included_zlib=no
 246   noconfigdirs="$noconfigdirs zlib"
 247 fi
 248
 249 # Don't compile the bundled readline/libreadline.a if --with-system-readline
 250 # is provided.
 251 if test x$with_system_readline = xyes ; then
 252   noconfigdirs="$noconfigdirs readline"
 253 fi
 254
 255 # some tools are so dependent upon X11 that if we're not building with X,
 256 # it's not even worth trying to configure, much less build, that tool.
 257
 258 case ${with_x} in
 259   yes | "") ;; # the default value for this tree is that X11 is available
 260   no)
 261     skipdirs="${skipdirs} tk itcl libgui"
 262     # We won't be able to build gdbtk without X.
 263     enable_gdbtk=no
 264     ;;
 265   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 266 esac
 267
 268 # Some are only suitable for cross toolchains.
 269 # Remove these if host=target.
 270 cross_only="target-libgloss target-newlib target-opcodes"
 271
 272 case $is_cross_compiler in
 273   no) skipdirs="${skipdirs} ${cross_only}" ;;
 274 esac
 275
 276 # If both --with-headers and --with-libs are specified, default to
 277 # --without-newlib.
 278 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 279    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 280   if test x"${with_newlib}" = x ; then
 281     with_newlib=no
 282   fi
 283 fi
 284
 285 # Recognize --with-newlib/--without-newlib.
 286 case ${with_newlib} in
 287   no) skipdirs="${skipdirs} target-newlib" ;;
 288   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 289 esac
 290
 291 AC_ARG_ENABLE(as-accelerator-for,
 292 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 293                 [build as offload target compiler.
 294                 Specify offload host triple by ARG])])
 295
 296 AC_ARG_ENABLE(offload-targets,
 297 [AS_HELP_STRING([--enable-offload-targets=LIST],
 298                 [enable offloading to devices from comma-separated LIST of
 299                 TARGET[=DIR]. Use optional path to find offload target compiler
 300                 during the build])],
 301 [
 302   if test x"$enable_offload_targets" = x; then
 303     AC_MSG_ERROR([no offload targets specified])
 304   fi
 305 ], [enable_offload_targets=])
 306
 307 # Handle --enable-gold, --enable-ld.
 308 # --disable-gold [--enable-ld]
 309 #     Build only ld.  Default option.
 310 # --enable-gold [--enable-ld]
 311 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 312 #     as "ld.bfd" and "ld".
 313 # --enable-gold=default [--enable-ld]
 314 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 315 #     install ld as "ld.bfd".
 316 # --enable-gold[=default] --disable-ld
 317 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 318 # --enable-gold --enable-ld=default
 319 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 320 #     and ld.bfd).
 321 #     In other words, ld is default
 322 # --enable-gold=default --enable-ld=default
 323 #     Error.
 324
 325 default_ld=
 326 AC_ARG_ENABLE(gold,
 327 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 328                 [build gold @<:@ARG={default,yes,no}@:>@])],
 329 ENABLE_GOLD=$enableval,
 330 ENABLE_GOLD=no)
 331 case "${ENABLE_GOLD}" in
 332   yes|default)
 333     # Check for ELF target.
 334     is_elf=no
 335     case "${target}" in
 336       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 337       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 338       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 339       | *-*-solaris2* | *-*-nto* | *-*-nacl* | *-*-haiku*)
 340         case "${target}" in
 341           *-*-linux*aout* | *-*-linux*oldld*)
 342             ;;
 343           *)
 344             is_elf=yes
 345             ;;
 346         esac
 347     esac
 348
 349     if test "$is_elf" = "yes"; then
 350       # Check for target supported by gold.
 351       case "${target}" in
 352         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 353         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-*)
 354           configdirs="$configdirs gold"
 355           if test x${ENABLE_GOLD} = xdefault; then
 356             default_ld=gold
 357           fi
 358           ENABLE_GOLD=yes
 359           ;;
 360       esac
 361     fi
 362     ;;
 363   no)
 364     ;;
 365   *)
 366     AC_MSG_ERROR([invalid --enable-gold argument])
 367     ;;
 368 esac
 369
 370 AC_ARG_ENABLE(ld,
 371 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 372                 [build ld @<:@ARG={default,yes,no}@:>@])],
 373 ENABLE_LD=$enableval,
 374 ENABLE_LD=yes)
 375
 376 case "${ENABLE_LD}" in
 377   default)
 378     if test x${default_ld} != x; then
 379       AC_MSG_ERROR([either gold or ld can be the default ld])
 380     fi
 381     ;;
 382   yes)
 383     ;;
 384   no)
 385     if test x${ENABLE_GOLD} != xyes; then
 386       AC_MSG_WARN([neither ld nor gold are enabled])
 387     fi
 388     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 389     ;;
 390   *)
 391     AC_MSG_ERROR([invalid --enable-ld argument])
 392     ;;
 393 esac
 394
 395 AC_ARG_ENABLE(gprofng,
 396 [AS_HELP_STRING([[--enable-gprofng[=ARG]]],
 397                 [build gprofng @<:@ARG={yes,no}@:>@])],
 398 enable_gprofng=$enableval,
 399 enable_gprofng=yes)
 400 if test "$enable_gprofng" = "yes"; then
 401   case "${target}" in
 402     x86_64-*-linux* | i?86-*-linux* | aarch64-*-linux*)
 403     configdirs="$configdirs gprofng"
 404     ;;
 405   esac
 406 fi
 407
 408
 409 # PR gas/19109
 410 # Decide the default method for compressing debug sections.
 411 # Provide a configure time option to override our default.
 412 AC_ARG_ENABLE(compressed_debug_sections,
 413 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 414                 [Enable compressed debug sections for gas, gold or ld by
 415                  default])],
 416 [
 417   if test x"$enable_compressed_debug_sections" = xyes; then
 418     AC_MSG_ERROR([no program with compressed debug sections specified])
 419   fi
 420 ], [enable_compressed_debug_sections=])
 421
 422 # Configure extra directories which are host specific
 423
 424 case "${host}" in
 425   *-cygwin*)
 426     configdirs="$configdirs libtermcap" ;;
 427 esac
 428
 429 # A target can indicate whether a language isn't supported for some reason.
 430 # Only spaces may be used in this macro; not newlines or tabs.
 431 unsupported_languages=
 432
 433 # Remove more programs from consideration, based on the host or
 434 # target this usually means that a port of the program doesn't
 435 # exist yet.
 436
 437 case "${host}" in
 438   i[[3456789]]86-*-msdosdjgpp*)
 439     noconfigdirs="$noconfigdirs tcl tk itcl"
 440     ;;
 441 esac
 442
 443
 444 AC_ARG_ENABLE(libquadmath,
 445 AS_HELP_STRING([--disable-libquadmath],
 446   [do not build libquadmath directory]),
 447 ENABLE_LIBQUADMATH=$enableval,
 448 ENABLE_LIBQUADMATH=yes)
 449 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 450   noconfigdirs="$noconfigdirs target-libquadmath"
 451 fi
 452
 453
 454 AC_ARG_ENABLE(libquadmath-support,
 455 AS_HELP_STRING([--disable-libquadmath-support],
 456   [disable libquadmath support for Fortran]),
 457 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 458 ENABLE_LIBQUADMATH_SUPPORT=yes)
 459 enable_libquadmath_support=
 460 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 461   enable_libquadmath_support=no
 462 fi
 463
 464
 465 AC_ARG_ENABLE(libada,
 466 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 467 ENABLE_LIBADA=$enableval,
 468 ENABLE_LIBADA=yes)
 469 if test "${ENABLE_LIBADA}" != "yes" ; then
 470   noconfigdirs="$noconfigdirs gnattools"
 471 fi
 472
 473 AC_ARG_ENABLE(libssp,
 474 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 475 ENABLE_LIBSSP=$enableval,
 476 ENABLE_LIBSSP=yes)
 477
 478 AC_ARG_ENABLE(libstdcxx,
 479 AS_HELP_STRING([--disable-libstdcxx],
 480   [do not build libstdc++-v3 directory]),
 481 ENABLE_LIBSTDCXX=$enableval,
 482 ENABLE_LIBSTDCXX=default)
 483 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 484   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 485 fi]
 486
 487 # If this is accelerator compiler and its target is intelmic we enable
 488 # target liboffloadmic by default.  If this is compiler with offloading
 489 # for intelmic we enable host liboffloadmic by default.  Otherwise
 490 # liboffloadmic is disabled by default.
 491 AC_ARG_ENABLE([liboffloadmic],
 492 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 493                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 494 [case "$enableval" in
 495   no | host | target)
 496     enable_liboffloadmic=$enableval ;;
 497   *)
 498     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 499 esac],
 500 [if test x"$enable_as_accelerator_for" != x; then
 501   case "${target}" in
 502     *-intelmic-* | *-intelmicemul-*)
 503       enable_liboffloadmic=target
 504       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 505       ;;
 506     *)
 507       enable_liboffloadmic=no
 508       ;;
 509   esac
 510 else
 511   case "${enable_offload_targets}" in
 512     *-intelmic-* | *-intelmicemul-*)
 513       enable_liboffloadmic=host
 514       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 515       ;;
 516     *)
 517       enable_liboffloadmic=no
 518       ;;
 519     esac
 520 fi])
 521 AC_SUBST(extra_liboffloadmic_configure_flags)
 522
 523 # Enable libgomp by default on hosted POSIX systems, and a few others.
 524 if test x$enable_libgomp = x ; then
 525     case "${target}" in
 526     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 527         ;;
 528     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 529         ;;
 530     *-*-solaris2* | *-*-hpux11*)
 531         ;;
 532     *-*-darwin* | *-*-aix*)
 533         ;;
 534     nvptx*-*-*)
 535         ;;
 536     *)
 537         noconfigdirs="$noconfigdirs target-libgomp"
 538         ;;
 539     esac
 540 fi
 541
 542 # Disable libatomic on unsupported systems.
 543 if test -d ${srcdir}/libatomic; then
 544     if test x$enable_libatomic = x; then
 545         AC_MSG_CHECKING([for libatomic support])
 546         if (srcdir=${srcdir}/libatomic; \
 547                 . ${srcdir}/configure.tgt; \
 548                 test -n "$UNSUPPORTED")
 549         then
 550             AC_MSG_RESULT([no])
 551             noconfigdirs="$noconfigdirs target-libatomic"
 552         else
 553             AC_MSG_RESULT([yes])
 554         fi
 555     fi
 556 fi
 557
 558 # Disable liboffloadmic on unsupported systems.
 559 if test -d ${srcdir}/liboffloadmic; then
 560     if test x$enable_liboffloadmic != xno; then
 561         AC_MSG_CHECKING([for liboffloadmic support])
 562         if (srcdir=${srcdir}/liboffloadmic; \
 563                 . ${srcdir}/configure.tgt; \
 564                 test -n "$UNSUPPORTED")
 565         then
 566             AC_MSG_RESULT([no])
 567             noconfigdirs="$noconfigdirs target-liboffloadmic"
 568         else
 569             AC_MSG_RESULT([yes])
 570         fi
 571     fi
 572 fi
 573
 574 # Disable libitm on unsupported systems.
 575 if test -d ${srcdir}/libitm; then
 576     if test x$enable_libitm = x; then
 577         AC_MSG_CHECKING([for libitm support])
 578         if (srcdir=${srcdir}/libitm; \
 579                 . ${srcdir}/configure.tgt; \
 580                 test -n "$UNSUPPORTED")
 581         then
 582             AC_MSG_RESULT([no])
 583             noconfigdirs="$noconfigdirs target-libitm"
 584         else
 585             AC_MSG_RESULT([yes])
 586         fi
 587     fi
 588 fi
 589
 590 # Disable libsanitizer on unsupported systems.
 591 if test -d ${srcdir}/libsanitizer; then
 592     if test x$enable_libsanitizer = x; then
 593         AC_MSG_CHECKING([for libsanitizer support])
 594         if (srcdir=${srcdir}/libsanitizer; \
 595                 . ${srcdir}/configure.tgt; \
 596                 test -n "$UNSUPPORTED")
 597         then
 598             AC_MSG_RESULT([no])
 599             noconfigdirs="$noconfigdirs target-libsanitizer"
 600         else
 601             AC_MSG_RESULT([yes])
 602         fi
 603     fi
 604 fi
 605
 606 # Disable libvtv on unsupported systems.
 607 if test -d ${srcdir}/libvtv; then
 608     if test x$enable_libvtv = x; then
 609         AC_MSG_CHECKING([for libvtv support])
 610         if (srcdir=${srcdir}/libvtv; \
 611                 . ${srcdir}/configure.tgt; \
 612                 test "$VTV_SUPPORTED" != "yes")
 613         then
 614             AC_MSG_RESULT([no])
 615             noconfigdirs="$noconfigdirs target-libvtv"
 616         else
 617             AC_MSG_RESULT([yes])
 618         fi
 619     fi
 620 fi
 621
 622
 623 # Disable libhsail-rt on unsupported systems.
 624 if test -d ${srcdir}/libhsail-rt; then
 625     if test x$enable_libhsail_rt = x; then
 626         AC_MSG_CHECKING([for libhsail-rt support])
 627         if (srcdir=${srcdir}/libhsail-rt; \
 628                 . ${srcdir}/configure.tgt; \
 629                 test -n "$UNSUPPORTED")
 630         then
 631             AC_MSG_RESULT([no])
 632             unsupported_languages="$unsupported_languages brig"
 633             # This implicitly disables also target-libhsail-rt as it won't
 634             # get added to the build without BRIG FE.
 635         else
 636             AC_MSG_RESULT([yes])
 637         fi
 638     fi
 639 fi
 640
 641
 642 # Disable libquadmath for some systems.
 643 case "${target}" in
 644   avr-*-*)
 645     noconfigdirs="$noconfigdirs target-libquadmath"
 646     ;;
 647   # libquadmath is unused on AIX and libquadmath build process use of
 648   # LD_LIBRARY_PATH can break AIX bootstrap.
 649   powerpc-*-aix* | rs6000-*-aix*)
 650     noconfigdirs="$noconfigdirs target-libquadmath"
 651     ;;
 652 esac
 653
 654 # Disable libssp for some systems.
 655 case "${target}" in
 656   avr-*-*)
 657     # No hosted I/O support.
 658     noconfigdirs="$noconfigdirs target-libssp"
 659     ;;
 660   powerpc-*-aix* | rs6000-*-aix*)
 661     noconfigdirs="$noconfigdirs target-libssp"
 662     ;;
 663   rl78-*-*)
 664     # libssp uses a misaligned load to trigger a fault, but the RL78
 665     # doesn't fault for those - instead, it gives a build-time error
 666     # for explicit misaligned loads.
 667     noconfigdirs="$noconfigdirs target-libssp"
 668     ;;
 669   visium-*-*)
 670     # No hosted I/O support.
 671     noconfigdirs="$noconfigdirs target-libssp"
 672     ;;
 673 esac
 674
 675 # Disable libstdc++-v3 for some systems.
 676 # Allow user to override this if they pass --enable-libstdc++-v3
 677 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 678   case "${target}" in
 679     *-*-vxworks*)
 680       # VxWorks uses the Dinkumware C++ library.
 681       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 682       ;;
 683     arm*-wince-pe*)
 684       # the C++ libraries don't build on top of CE's C libraries
 685       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 686       ;;
 687     avr-*-*)
 688       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 689       ;;
 690     ft32-*-*)
 691       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 692       ;;
 693   esac
 694 fi
 695
 696 # Disable Fortran for some systems.
 697 case "${target}" in
 698   mmix-*-*)
 699     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 700     unsupported_languages="$unsupported_languages fortran"
 701     ;;
 702 esac
 703
 704 # Disable libffi for some systems.
 705 case "${target}" in
 706   powerpc-*-darwin*)
 707     ;;
 708   i[[3456789]]86-*-darwin*)
 709     ;;
 710   x86_64-*-darwin[[912]]*)
 711     ;;
 712   *-*-darwin*)
 713     noconfigdirs="$noconfigdirs target-libffi"
 714     ;;
 715   *-*-netware*)
 716     noconfigdirs="$noconfigdirs target-libffi"
 717     ;;
 718   *-*-phoenix*)
 719     noconfigdirs="$noconfigdirs target-libffi"
 720     ;;
 721   *-*-rtems*)
 722     noconfigdirs="$noconfigdirs target-libffi"
 723     ;;
 724   *-*-tpf*)
 725     noconfigdirs="$noconfigdirs target-libffi"
 726     ;;
 727   *-*-uclinux*)
 728     noconfigdirs="$noconfigdirs target-libffi"
 729     ;;
 730   *-*-vxworks*)
 731     noconfigdirs="$noconfigdirs target-libffi"
 732     ;;
 733   aarch64*-*-freebsd*)
 734     noconfigdirs="$noconfigdirs target-libffi"
 735     ;;
 736   alpha*-*-*vms*)
 737     noconfigdirs="$noconfigdirs target-libffi"
 738     ;;
 739   arm*-*-freebsd*)
 740     noconfigdirs="$noconfigdirs target-libffi"
 741     ;;
 742   arm-wince-pe)
 743     noconfigdirs="$noconfigdirs target-libffi"
 744     ;;
 745   cris-*-* | crisv32-*-*)
 746     case "${target}" in
 747       *-*-linux*)
 748         ;;
 749       *) # See PR46792 regarding target-libffi.
 750         noconfigdirs="$noconfigdirs target-libffi";;
 751     esac
 752     ;;
 753   hppa*64*-*-hpux*)
 754     noconfigdirs="$noconfigdirs target-libffi"
 755     ;;
 756   hppa*-hp-hpux11*)
 757     ;;
 758   hppa*-*-hpux*)
 759     noconfigdirs="$noconfigdirs target-libffi"
 760     ;;
 761   ia64*-*-*vms*)
 762     noconfigdirs="$noconfigdirs target-libffi"
 763     ;;
 764   i[[3456789]]86-w64-mingw*)
 765     noconfigdirs="$noconfigdirs target-libffi"
 766     ;;
 767   i[[3456789]]86-*-mingw*)
 768     noconfigdirs="$noconfigdirs target-libffi"
 769     ;;
 770   x86_64-*-mingw*)
 771     noconfigdirs="$noconfigdirs target-libffi"
 772     ;;
 773   mmix-*-*)
 774     noconfigdirs="$noconfigdirs target-libffi"
 775     ;;
 776   powerpc-*-aix*)
 777     ;;
 778   rs6000-*-aix*)
 779     ;;
 780   ft32-*-*)
 781     noconfigdirs="$noconfigdirs target-libffi"
 782     ;;
 783   *-*-lynxos*)
 784     noconfigdirs="$noconfigdirs target-libffi"
 785     ;;
 786 esac
 787
 788 # Disable the go frontend on systems where it is known to not work. Please keep
 789 # this in sync with contrib/config-list.mk.
 790 case "${target}" in
 791 *-*-darwin* | *-*-cygwin* | *-*-mingw*)
 792     unsupported_languages="$unsupported_languages go"
 793     ;;
 794 esac
 795
 796 # Only allow gdbserver on some systems.
 797 if test -d ${srcdir}/gdbserver; then
 798     if test x$enable_gdbserver = x; then
 799         AC_MSG_CHECKING([for gdbserver support])
 800         if (srcdir=${srcdir}/gdbserver; \
 801                 . ${srcdir}/configure.srv; \
 802                 test -n "$UNSUPPORTED")
 803         then
 804             AC_MSG_RESULT([no])
 805             noconfigdirs="$noconfigdirs gdbserver"
 806         else
 807             AC_MSG_RESULT([yes])
 808         fi
 809     fi
 810 fi
 811
 812 # Disable libgo for some systems where it is known to not work.
 813 # For testing, you can easily override this with --enable-libgo.
 814 if test x$enable_libgo = x; then
 815     case "${target}" in
 816     *-*-darwin*)
 817         # PR 46986
 818         noconfigdirs="$noconfigdirs target-libgo"
 819         ;;
 820     *-*-cygwin* | *-*-mingw*)
 821         noconfigdirs="$noconfigdirs target-libgo"
 822         ;;
 823     esac
 824 fi
 825
 826 # Default libgloss CPU subdirectory.
 827 libgloss_dir="$target_cpu"
 828
 829 case "${target}" in
 830   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 831     libgloss_dir=wince
 832     ;;
 833   aarch64*-*-* )
 834     libgloss_dir=aarch64
 835     ;;
 836   arm*-*-*)
 837     libgloss_dir=arm
 838     ;;
 839   cris-*-* | crisv32-*-*)
 840     libgloss_dir=cris
 841     ;;
 842   hppa*-*-*)
 843     libgloss_dir=pa
 844     ;;
 845   i[[3456789]]86-*-*)
 846     libgloss_dir=i386
 847     ;;
 848   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 849     libgloss_dir=m68hc11
 850     ;;
 851   m68*-*-* | fido-*-*)
 852     libgloss_dir=m68k
 853     ;;
 854   mips*-*-*)
 855     libgloss_dir=mips
 856     ;;
 857   powerpc*-*-*)
 858     libgloss_dir=rs6000
 859     ;;
 860   sparc*-*-*)
 861     libgloss_dir=sparc
 862     ;;
 863 esac
 864
 865 # Disable newlib and libgloss for various target OSes.
 866 case "${target}" in
 867   alpha*-dec-osf*)
 868     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 869     ;;
 870   i[[3456789]]86-*-linux*)
 871     # This section makes it possible to build newlib natively on linux.
 872     # If we are using a cross compiler then don't configure newlib.
 873     if test x${is_cross_compiler} != xno ; then
 874       noconfigdirs="$noconfigdirs target-newlib"
 875     fi
 876     noconfigdirs="$noconfigdirs target-libgloss"
 877     # If we are not using a cross compiler, do configure newlib.
 878     # Note however, that newlib will only be configured in this situation
 879     # if the --with-newlib option has been given, because otherwise
 880     # 'target-newlib' will appear in skipdirs.
 881     ;;
 882   i[[3456789]]86-*-rdos*)
 883     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 884     ;;
 885   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 886     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 887     ;;
 888   sparc-*-sunos4*)
 889     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 890     ;;
 891   *-*-aix*)
 892     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 893     ;;
 894   *-*-beos*)
 895     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 896     ;;
 897   *-*-chorusos)
 898     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 899     ;;
 900   *-*-dragonfly*)
 901     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 902     ;;
 903   *-*-freebsd*)
 904     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 905     ;;
 906   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 907     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 908     ;;
 909   *-*-lynxos*)
 910     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 911     ;;
 912   *-*-mingw*)
 913     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 914     ;;
 915   *-*-netbsd*)
 916     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 917     ;;
 918   *-*-netware*)
 919     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 920     ;;
 921   *-*-tpf*)
 922     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 923     ;;
 924   *-*-uclinux*)
 925     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 926     ;;
 927   *-*-vxworks*)
 928     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 929     ;;
 930 esac
 931
 932 case "${target}" in
 933   *-*-chorusos)
 934     ;;
 935   aarch64-*-darwin*)
 936     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 937     noconfigdirs="$noconfigdirs sim target-rda"
 938     ;;
 939   arm-*-darwin*)
 940     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 941     noconfigdirs="$noconfigdirs sim target-rda"
 942     ;;
 943   powerpc-*-darwin*)
 944     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 945     noconfigdirs="$noconfigdirs sim target-rda"
 946     ;;
 947   i[[3456789]]86-*-darwin*)
 948     noconfigdirs="$noconfigdirs ld gprof"
 949     noconfigdirs="$noconfigdirs sim target-rda"
 950     ;;
 951   x86_64-*-darwin[[912]]*)
 952     noconfigdirs="$noconfigdirs ld gas gprof"
 953     noconfigdirs="$noconfigdirs sim target-rda"
 954     ;;
 955   *-*-darwin*)
 956     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 957     noconfigdirs="$noconfigdirs sim target-rda"
 958     ;;
 959   *-*-dragonfly*)
 960     ;;
 961   *-*-freebsd*)
 962     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
 963         && test -f /usr/local/include/gmp.h; then
 964       with_gmp=/usr/local
 965     fi
 966     ;;
 967   *-*-kaos*)
 968     # Remove unsupported stuff on all kaOS configurations.
 969     noconfigdirs="$noconfigdirs target-libgloss"
 970     ;;
 971   *-*-netbsd*)
 972     ;;
 973   *-*-netware*)
 974     ;;
 975   *-*-phoenix*)
 976     noconfigdirs="$noconfigdirs target-libgloss"
 977     ;;
 978   *-*-rtems*)
 979     noconfigdirs="$noconfigdirs target-libgloss"
 980     ;;
 981     # The tpf target doesn't support gdb yet.
 982   *-*-tpf*)
 983     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
 984     ;;
 985   *-*-uclinux*)
 986     noconfigdirs="$noconfigdirs target-rda"
 987     ;;
 988   *-*-vxworks*)
 989     ;;
 990   alpha*-dec-osf*)
 991     # ld works, but does not support shared libraries.
 992     # gas doesn't generate exception information.
 993     noconfigdirs="$noconfigdirs gas ld"
 994     ;;
 995   alpha*-*-*vms*)
 996     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
 997     ;;
 998   alpha*-*-*)
 999     # newlib is not 64 bit ready
1000     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1001     ;;
1002   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1003     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1004     ;;
1005   arc*-*-*)
1006     noconfigdirs="$noconfigdirs sim"
1007     ;;
1008   arm-*-pe*)
1009     noconfigdirs="$noconfigdirs target-libgloss"
1010     ;;
1011   arm-*-riscix*)
1012     noconfigdirs="$noconfigdirs ld target-libgloss"
1013     ;;
1014   avr-*-*)
1015     if test x${with_avrlibc} != xno; then
1016       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1017     fi
1018     ;;
1019   c4x-*-* | tic4x-*-*)
1020     noconfigdirs="$noconfigdirs target-libgloss"
1021     ;;
1022   tic54x-*-*)
1023     noconfigdirs="$noconfigdirs target-libgloss gdb"
1024     ;;
1025   d10v-*-*)
1026     noconfigdirs="$noconfigdirs target-libgloss"
1027     ;;
1028   d30v-*-*)
1029     noconfigdirs="$noconfigdirs gdb"
1030     ;;
1031   fr30-*-elf*)
1032     noconfigdirs="$noconfigdirs gdb"
1033     ;;
1034   ft32-*-*)
1035     noconfigdirs="$noconfigdirs target-rda gprof"
1036     ;;
1037   moxie-*-*)
1038     noconfigdirs="$noconfigdirs"
1039     ;;
1040   h8300*-*-*)
1041     noconfigdirs="$noconfigdirs target-libgloss"
1042     ;;
1043   h8500-*-*)
1044     noconfigdirs="$noconfigdirs target-libgloss"
1045     ;;
1046   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1047     ;;
1048   hppa*64*-*-hpux*)
1049     noconfigdirs="$noconfigdirs gdb"
1050     ;;
1051   hppa*-*-hpux11*)
1052     noconfigdirs="$noconfigdirs gdb ld"
1053     ;;
1054   hppa*64*-*-linux*)
1055     ;;
1056   hppa*-*-linux*)
1057     ;;
1058   hppa*-*-*elf* | \
1059   hppa*-*-lites* | \
1060   hppa*-*-openbsd* | \
1061   hppa*64*-*-*)
1062     ;;
1063   hppa*-*-pro*)
1064     ;;
1065   hppa*-*-*)
1066     noconfigdirs="$noconfigdirs ld"
1067     ;;
1068   i960-*-*)
1069     noconfigdirs="$noconfigdirs gdb"
1070     ;;
1071   ia64*-*-elf*)
1072     # No gdb support yet.
1073     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1074     ;;
1075   ia64*-**-hpux*)
1076     # No ld support yet.
1077     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1078     ;;
1079   ia64*-*-*vms*)
1080     # No ld support yet.
1081     noconfigdirs="$noconfigdirs libgui itcl ld"
1082     ;;
1083   i[[3456789]]86-w64-mingw*)
1084     ;;
1085   i[[3456789]]86-*-mingw*)
1086     target_configdirs="$target_configdirs target-winsup"
1087     ;;
1088   *-*-cygwin*)
1089     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1090     noconfigdirs="$noconfigdirs target-libgloss"
1091     # always build newlib if winsup directory is present.
1092     if test -d "$srcdir/winsup/cygwin"; then
1093       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1094     elif test -d "$srcdir/newlib"; then
1095       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1096     fi
1097     ;;
1098   i[[3456789]]86-*-pe)
1099     noconfigdirs="$noconfigdirs target-libgloss"
1100     ;;
1101   i[[3456789]]86-*-sco3.2v5*)
1102     # The linker does not yet know about weak symbols in COFF,
1103     # and is not configured to handle mixed ELF and COFF.
1104     noconfigdirs="$noconfigdirs ld target-libgloss"
1105     ;;
1106   i[[3456789]]86-*-sco*)
1107     noconfigdirs="$noconfigdirs gprof target-libgloss"
1108     ;;
1109   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1110     noconfigdirs="$noconfigdirs target-libgloss"
1111     ;;
1112   i[[3456789]]86-*-sysv4*)
1113     noconfigdirs="$noconfigdirs target-libgloss"
1114     ;;
1115   i[[3456789]]86-*-beos*)
1116     noconfigdirs="$noconfigdirs gdb"
1117     ;;
1118   i[[3456789]]86-*-rdos*)
1119     noconfigdirs="$noconfigdirs gdb"
1120     ;;
1121   mmix-*-*)
1122     noconfigdirs="$noconfigdirs gdb"
1123     ;;
1124   mt-*-*)
1125     noconfigdirs="$noconfigdirs sim"
1126     ;;
1127   nfp-*-*)
1128     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1129     noconfigdirs="$noconfigdirs $target_libraries"
1130     ;;
1131   pdp11-*-*)
1132     noconfigdirs="$noconfigdirs gdb gprof"
1133     ;;
1134   powerpc-*-aix*)
1135     # copied from rs6000-*-* entry
1136     noconfigdirs="$noconfigdirs gprof"
1137     ;;
1138   powerpc*-*-winnt* | powerpc*-*-pe*)
1139     target_configdirs="$target_configdirs target-winsup"
1140     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1141     # always build newlib.
1142     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1143     ;;
1144     # This is temporary until we can link against shared libraries
1145   powerpcle-*-solaris*)
1146     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1147     ;;
1148   powerpc-*-beos*)
1149     noconfigdirs="$noconfigdirs gdb"
1150     ;;
1151   rs6000-*-lynxos*)
1152     noconfigdirs="$noconfigdirs gprof"
1153     ;;
1154   rs6000-*-aix*)
1155     noconfigdirs="$noconfigdirs gprof"
1156     ;;
1157   rs6000-*-*)
1158     noconfigdirs="$noconfigdirs gprof"
1159     ;;
1160   m68k-apollo-*)
1161     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1162     ;;
1163   microblaze*)
1164     noconfigdirs="$noconfigdirs gprof"
1165     ;;
1166   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1167     if test x$with_newlib = xyes; then
1168       noconfigdirs="$noconfigdirs gprof"
1169     fi
1170     ;;
1171   mips*-*-irix5*)
1172     noconfigdirs="$noconfigdirs gprof target-libgloss"
1173     ;;
1174   mips*-*-irix6*)
1175     noconfigdirs="$noconfigdirs gprof target-libgloss"
1176     ;;
1177   mips*-*-bsd*)
1178     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1179     ;;
1180   mips*-*-linux*)
1181     ;;
1182   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1183   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1184     noconfigdirs="$noconfigdirs ld gas gprof"
1185     ;;
1186   mips*-*-*)
1187     noconfigdirs="$noconfigdirs gprof"
1188     ;;
1189   nvptx*-*-*)
1190     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1191     ;;
1192   sh-*-*)
1193     case "${target}" in
1194       sh*-*-elf)
1195          ;;
1196       *)
1197          noconfigdirs="$noconfigdirs target-libgloss" ;;
1198     esac
1199     ;;
1200   sparc-*-sunos4*)
1201     if test x${is_cross_compiler} = xno ; then
1202            use_gnu_ld=no
1203     fi
1204     ;;
1205   tic6x-*-*)
1206     noconfigdirs="$noconfigdirs sim"
1207     ;;
1208   tilepro*-*-* | tilegx*-*-*)
1209     noconfigdirs="$noconfigdirs sim"
1210     ;;
1211   v810-*-*)
1212     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1213     ;;
1214   vax-*-*)
1215     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1216     ;;
1217   wasm32-*-*)
1218     noconfigdirs="$noconfigdirs ld"
1219     ;;
1220 esac
1221
1222 # If we aren't building newlib, then don't build libgloss, since libgloss
1223 # depends upon some newlib header files.
1224 case "${noconfigdirs}" in
1225   *target-libgloss*) ;;
1226   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1227 esac
1228
1229 # Work in distributions that contain no compiler tools, like Autoconf.
1230 host_makefile_frag=/dev/null
1231 if test -d ${srcdir}/config ; then
1232 case "${host}" in
1233   i[[3456789]]86-*-msdosdjgpp*)
1234     host_makefile_frag="config/mh-djgpp"
1235     ;;
1236   *-cygwin*)
1237     ACX_CHECK_CYGWIN_CAT_WORKS
1238     host_makefile_frag="config/mh-cygwin"
1239     ;;
1240   *-mingw*)
1241     host_makefile_frag="config/mh-mingw"
1242     ;;
1243   alpha*-linux*)
1244     host_makefile_frag="config/mh-alpha-linux"
1245     ;;
1246   hppa*-hp-hpux10*)
1247     host_makefile_frag="config/mh-pa-hpux10"
1248     ;;
1249   hppa*-hp-hpux*)
1250     host_makefile_frag="config/mh-pa"
1251     ;;
1252   hppa*-*)
1253     host_makefile_frag="config/mh-pa"
1254     ;;
1255   *-*-darwin*)
1256     host_makefile_frag="config/mh-darwin"
1257     ;;
1258   powerpc-*-aix*)
1259     host_makefile_frag="config/mh-ppc-aix"
1260     ;;
1261   rs6000-*-aix*)
1262     host_makefile_frag="config/mh-ppc-aix"
1263     ;;
1264 esac
1265 fi
1266
1267 if test "${build}" != "${host}" ; then
1268   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1269   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1270   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1271   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1272   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1273   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
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   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1288   LD_FOR_BUILD="\$(LD)"
1289   NM_FOR_BUILD="\$(NM)"
1290   RANLIB_FOR_BUILD="\$(RANLIB)"
1291   WINDRES_FOR_BUILD="\$(WINDRES)"
1292   WINDMC_FOR_BUILD="\$(WINDMC)"
1293 fi
1294
1295 AC_PROG_CC_C99
1296 AC_PROG_CXX
1297
1298 # We must set the default linker to the linker used by gcc for the correct
1299 # operation of libtool.  If LD is not defined and we are using gcc, try to
1300 # set the LD default to the ld used by gcc.
1301 if test -z "$LD"; then
1302   if test "$GCC" = yes; then
1303     case $build in
1304     *-*-mingw*)
1305       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1306     *)
1307       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1308     esac
1309     case $gcc_prog_ld in
1310     # Accept absolute paths.
1311     [[\\/]* | [A-Za-z]:[\\/]*)]
1312       LD="$gcc_prog_ld" ;;
1313     esac
1314   fi
1315 fi
1316
1317 # Check whether -static-libstdc++ -static-libgcc is supported.
1318 have_static_libs=no
1319 if test "$GCC" = yes; then
1320   saved_LDFLAGS="$LDFLAGS"
1321
1322   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1323   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1324   AC_LANG_PUSH(C++)
1325   AC_LINK_IFELSE([AC_LANG_SOURCE([
1326 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1327 #error -static-libstdc++ not implemented
1328 #endif
1329 int main() {}])],
1330     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1331     [AC_MSG_RESULT([no])])
1332   AC_LANG_POP(C++)
1333
1334   LDFLAGS="$saved_LDFLAGS"
1335 fi
1336
1337 ACX_PROG_GNAT
1338 ACX_PROG_CMP_IGNORE_INITIAL
1339
1340 AC_ARG_ENABLE([bootstrap],
1341 [AS_HELP_STRING([--enable-bootstrap],
1342                 [enable bootstrapping @<:@yes if native build@:>@])],,
1343 enable_bootstrap=default)
1344
1345 # Issue errors and warnings for invalid/strange bootstrap combinations.
1346 if test -r $srcdir/gcc/configure; then
1347   have_compiler=yes
1348 else
1349   have_compiler=no
1350 fi
1351
1352 case "$have_compiler:$host:$target:$enable_bootstrap" in
1353   *:*:*:no) ;;
1354
1355   # Default behavior.  Enable bootstrap if we have a compiler
1356   # and we are in a native configuration.
1357   yes:$build:$build:default)
1358     enable_bootstrap=yes ;;
1359
1360   *:*:*:default)
1361     enable_bootstrap=no ;;
1362
1363   # We have a compiler and we are in a native configuration, bootstrap is ok
1364   yes:$build:$build:yes)
1365     ;;
1366
1367   # Other configurations, but we have a compiler.  Assume the user knows
1368   # what he's doing.
1369   yes:*:*:yes)
1370     AC_MSG_WARN([trying to bootstrap a cross compiler])
1371     ;;
1372
1373   # No compiler: if they passed --enable-bootstrap explicitly, fail
1374   no:*:*:yes)
1375     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1376
1377   # Fail if wrong command line
1378   *)
1379     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1380     ;;
1381 esac
1382
1383 # When bootstrapping with GCC, build stage 1 in C++98 mode to ensure that a
1384 # C++98 compiler can still start the bootstrap.
1385 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1386   CXX="$CXX -std=gnu++98"
1387 fi
1388
1389 AC_ARG_ENABLE([pgo-build],
1390 [AS_HELP_STRING([--enable-pgo-build[[=lto]]],
1391                 [enable the PGO build])],
1392 [enable_pgo_build=$enableval],
1393 [enable_pgo_build=no])
1394
1395 # Issue errors and warnings for invalid/strange PGO build combinations.
1396 case "$have_compiler:$host:$target:$enable_pgo_build" in
1397   *:*:*:no) ;;
1398
1399   # Allow the PGO build only if we aren't building a compiler and
1400   # we are in a native configuration.
1401   no:$build:$build:yes | no:$build:$build:lto) ;;
1402
1403   # Disallow the PGO bootstrap if we are building a compiler.
1404   yes:*:*:yes | yes:*:*:lto)
1405     AC_MSG_ERROR([cannot perform the PGO bootstrap when building a compiler]) ;;
1406
1407   *)
1408     AC_MSG_ERROR([invalid option for --enable-pgo-build])
1409     ;;
1410 esac
1411
1412 if test "$enable_pgo_build" != "no"; then
1413   AC_MSG_CHECKING([whether the compiler supports -fprofile-generate])
1414   old_CFLAGS="$CFLAGS"
1415   PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
1416   CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
1417   AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1418                     [PGO_BUILD_GEN_CFLAGS=])
1419   CFLAGS="$old_CFLAGS"
1420   if test -n "$PGO_BUILD_GEN_CFLAGS"; then
1421     AC_MSG_RESULT([yes])
1422     PGO_BUILD_USE_CFLAGS="-fprofile-use"
1423   else
1424     AC_MSG_RESULT([no])
1425     AC_MSG_ERROR([cannot perform the PGO build without -fprofile-generate])
1426   fi
1427
1428   if test "$enable_pgo_build" = "lto"; then
1429     AC_MSG_CHECKING([whether the compiler supports -flto=jobserver -ffat-lto-objects])
1430     old_CFLAGS="$CFLAGS"
1431     PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
1432     CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
1433     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1434                       [PGO_BUILD_LTO_CFLAGS=])
1435     CFLAGS="$old_CFLAGS"
1436     if test -n "$PGO_BUILD_LTO_CFLAGS"; then
1437       AC_MSG_RESULT([yes])
1438     else
1439       AC_MSG_RESULT([no])
1440       AC_MSG_WARN([LTO is disabled for the PGO build])
1441     fi
1442   fi
1443 fi
1444 AC_SUBST(PGO_BUILD_GEN_CFLAGS)
1445 AC_SUBST(PGO_BUILD_USE_CFLAGS)
1446 AC_SUBST(PGO_BUILD_LTO_CFLAGS)
1447
1448 # Used for setting $lt_cv_objdir
1449 _LT_CHECK_OBJDIR
1450
1451 # Check for GMP, MPFR and MPC
1452 gmplibs="-lmpc -lmpfr -lgmp"
1453 gmpinc=
1454 have_gmp=no
1455
1456 # Specify a location for mpc
1457 # check for this first so it ends up on the link line before mpfr.
1458 AC_ARG_WITH(mpc,
1459 [AS_HELP_STRING([--with-mpc=PATH],
1460                 [specify prefix directory for installed MPC package.
1461                  Equivalent to --with-mpc-include=PATH/include
1462                  plus --with-mpc-lib=PATH/lib])])
1463 AC_ARG_WITH(mpc-include,
1464 [AS_HELP_STRING([--with-mpc-include=PATH],
1465                 [specify directory for installed MPC include files])])
1466 AC_ARG_WITH(mpc-lib,
1467 [AS_HELP_STRING([--with-mpc-lib=PATH],
1468                 [specify directory for the installed MPC library])])
1469
1470 if test "x$with_mpc" != x; then
1471   gmplibs="-L$with_mpc/lib $gmplibs"
1472   gmpinc="-I$with_mpc/include $gmpinc"
1473 fi
1474 if test "x$with_mpc_include" != x; then
1475   gmpinc="-I$with_mpc_include $gmpinc"
1476 fi
1477 if test "x$with_mpc_lib" != x; then
1478   gmplibs="-L$with_mpc_lib $gmplibs"
1479 fi
1480 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1481   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1482   gmpinc='-I$$s/mpc/src '"$gmpinc"
1483   # Do not test the mpc version.  Assume that it is sufficient, since
1484   # it is in the source tree, and the library has not been built yet
1485   # but it would be included on the link line in the version check below
1486   # hence making the test fail.
1487   have_gmp=yes
1488 fi
1489
1490 # Specify a location for mpfr
1491 # check for this first so it ends up on the link line before gmp.
1492 AC_ARG_WITH(mpfr-dir,
1493 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1494 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1495 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1496
1497 AC_ARG_WITH(mpfr,
1498 [AS_HELP_STRING([--with-mpfr=PATH],
1499                 [specify prefix directory for installed MPFR package.
1500                  Equivalent to --with-mpfr-include=PATH/include
1501                  plus --with-mpfr-lib=PATH/lib])])
1502 AC_ARG_WITH(mpfr-include,
1503 [AS_HELP_STRING([--with-mpfr-include=PATH],
1504                 [specify directory for installed MPFR include files])])
1505 AC_ARG_WITH(mpfr-lib,
1506 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1507                 [specify directory for the installed MPFR library])])
1508
1509 if test "x$with_mpfr" != x; then
1510   gmplibs="-L$with_mpfr/lib $gmplibs"
1511   gmpinc="-I$with_mpfr/include $gmpinc"
1512 fi
1513 if test "x$with_mpfr_include" != x; then
1514   gmpinc="-I$with_mpfr_include $gmpinc"
1515 fi
1516 if test "x$with_mpfr_lib" != x; then
1517   gmplibs="-L$with_mpfr_lib $gmplibs"
1518 fi
1519 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1520   # MPFR v3.1.0 moved the sources into a src sub-directory.
1521   if ! test -d ${srcdir}/mpfr/src; then
1522     AC_MSG_ERROR([dnl
1523 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1524   fi
1525   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1526   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1527   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1528   # Do not test the mpfr version.  Assume that it is sufficient, since
1529   # it is in the source tree, and the library has not been built yet
1530   # but it would be included on the link line in the version check below
1531   # hence making the test fail.
1532   have_gmp=yes
1533 fi
1534
1535 # Specify a location for gmp
1536 AC_ARG_WITH(gmp-dir,
1537 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1538 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1539 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1540
1541 AC_ARG_WITH(gmp,
1542 [AS_HELP_STRING([--with-gmp=PATH],
1543                 [specify prefix directory for the installed GMP package.
1544                  Equivalent to --with-gmp-include=PATH/include
1545                  plus --with-gmp-lib=PATH/lib])])
1546 AC_ARG_WITH(gmp-include,
1547 [AS_HELP_STRING([--with-gmp-include=PATH],
1548                 [specify directory for installed GMP include files])])
1549 AC_ARG_WITH(gmp-lib,
1550 [AS_HELP_STRING([--with-gmp-lib=PATH],
1551                 [specify directory for the installed GMP library])])
1552
1553
1554 if test "x$with_gmp" != x; then
1555   gmplibs="-L$with_gmp/lib $gmplibs"
1556   gmpinc="-I$with_gmp/include $gmpinc"
1557 fi
1558 if test "x$with_gmp_include" != x; then
1559   gmpinc="-I$with_gmp_include $gmpinc"
1560 fi
1561 if test "x$with_gmp_lib" != x; then
1562   gmplibs="-L$with_gmp_lib $gmplibs"
1563 fi
1564 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1565   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1566   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1567   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1568   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1569   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1570   # Do not test the gmp version.  Assume that it is sufficient, since
1571   # it is in the source tree, and the library has not been built yet
1572   # but it would be included on the link line in the version check below
1573   # hence making the test fail.
1574   have_gmp=yes
1575 fi
1576
1577 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1578   have_gmp=yes
1579   saved_CFLAGS="$CFLAGS"
1580   CFLAGS="$CFLAGS $gmpinc"
1581   # Check for the recommended and required versions of GMP.
1582   AC_MSG_CHECKING([for the correct version of gmp.h])
1583   AC_TRY_COMPILE([#include "gmp.h"],[
1584   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1585   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1586   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1587   choke me
1588   #endif
1589   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1590   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1591   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1592   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1593   choke me
1594   #endif
1595   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1596    [AC_MSG_RESULT([no]); have_gmp=no])
1597
1598   # If we have GMP, check the MPFR version.
1599   if test x"$have_gmp" = xyes; then
1600     # Check for the recommended and required versions of MPFR.
1601     AC_MSG_CHECKING([for the correct version of mpfr.h])
1602     AC_TRY_COMPILE([#include <gmp.h>
1603     #include <mpfr.h>],[
1604     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,0)
1605     choke me
1606     #endif
1607     ], [AC_TRY_COMPILE([#include <gmp.h>
1608     #include <mpfr.h>],[
1609     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,2)
1610     choke me
1611     #endif
1612     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1613      [AC_MSG_RESULT([no]); have_gmp=no])
1614   fi
1615
1616   # Check for the MPC header version.
1617   if test x"$have_gmp" = xyes ; then
1618     # Check for the recommended and required versions of MPC.
1619     AC_MSG_CHECKING([for the correct version of mpc.h])
1620     AC_TRY_COMPILE([#include <mpc.h>],[
1621     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1622     choke me
1623     #endif
1624     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1625     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1626     choke me
1627     #endif
1628     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1629      [AC_MSG_RESULT([no]); have_gmp=no])
1630   fi
1631
1632   # Now check the MPFR library.
1633   if test x"$have_gmp" = xyes; then
1634     saved_LIBS="$LIBS"
1635     LIBS="$LIBS $gmplibs"
1636     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1637     AC_TRY_LINK([#include <mpc.h>],[
1638     mpfr_t n;
1639     mpfr_t x;
1640     mpc_t c;
1641     int t;
1642     mpfr_init (n);
1643     mpfr_init (x);
1644     mpfr_atan2 (n, n, x, GMP_RNDN);
1645     mpfr_erfc (n, x, GMP_RNDN);
1646     mpfr_subnormalize (x, t, GMP_RNDN);
1647     mpfr_clear(n);
1648     mpfr_clear(x);
1649     mpc_init2 (c, 53);
1650     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1651     mpc_cosh (c, c, MPC_RNDNN);
1652     mpc_pow (c, c, c, MPC_RNDNN);
1653     mpc_acosh (c, c, MPC_RNDNN);
1654     mpc_clear (c);
1655     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1656     LIBS="$saved_LIBS"
1657   fi
1658
1659   CFLAGS="$saved_CFLAGS"
1660
1661 # The library versions listed in the error message below should match
1662 # the HARD-minimums enforced above.
1663   if test x$have_gmp != xyes; then
1664     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
1665 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1666 their locations.  Source code for these libraries can be found at
1667 their respective hosting sites as well as at
1668 ftp://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1669 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1670 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1671 make sure that you have installed both the libraries and the header
1672 files.  They may be located in separate packages.])
1673   fi
1674 fi
1675
1676 # Flags needed for both GMP, MPFR and/or MPC.
1677 AC_SUBST(gmplibs)
1678 AC_SUBST(gmpinc)
1679 AC_SUBST(extra_mpfr_configure_flags)
1680 AC_SUBST(extra_mpc_gmp_configure_flags)
1681 AC_SUBST(extra_mpc_mpfr_configure_flags)
1682 AC_SUBST(extra_isl_gmp_configure_flags)
1683
1684 # Libraries to use for stage1 or when not bootstrapping.
1685 AC_ARG_WITH(stage1-libs,
1686 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1687 [if test "$withval" = "no" -o "$withval" = "yes"; then
1688    stage1_libs=
1689  else
1690    stage1_libs=$withval
1691  fi],
1692 [stage1_libs=])
1693 AC_SUBST(stage1_libs)
1694
1695 # Whether or not to use -static-libstdc++ and -static-libgcc.  The
1696 # default is yes if gcc is being built; no otherwise.  The reason for
1697 # this default is that gdb is sometimes linked against GNU Source
1698 # Highlight, which is a shared library that uses C++ exceptions.  In
1699 # this case, -static-libstdc++ will cause crashes.
1700 AC_ARG_WITH(static-standard-libraries,
1701 [AS_HELP_STRING([--with-static-standard-libraries],
1702                 [use -static-libstdc++ and -static-libgcc (default=auto)])],
1703 [], [with_static_standard_libraries=auto])
1704 if test "$with_static_standard_libraries" = auto; then
1705   with_static_standard_libraries=$have_compiler
1706 fi
1707
1708 # Linker flags to use for stage1 or when not bootstrapping.
1709 AC_ARG_WITH(stage1-ldflags,
1710 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1711 [if test "$withval" = "no" -o "$withval" = "yes"; then
1712    stage1_ldflags=
1713  else
1714    stage1_ldflags=$withval
1715  fi],
1716 [stage1_ldflags=
1717  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1718  # if supported.  But if the user explicitly specified the libraries to use,
1719  # trust that they are doing what they want.
1720  if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
1721      -a "$have_static_libs" = yes; then
1722    stage1_ldflags="-static-libstdc++ -static-libgcc"
1723  fi])
1724 AC_SUBST(stage1_ldflags)
1725
1726 # Libraries to use for stage2 and later builds.
1727 AC_ARG_WITH(boot-libs,
1728 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1729 [if test "$withval" = "no" -o "$withval" = "yes"; then
1730    poststage1_libs=
1731  else
1732    poststage1_libs=$withval
1733  fi],
1734 [poststage1_libs=])
1735 AC_SUBST(poststage1_libs)
1736
1737 # Linker flags to use for stage2 and later builds.
1738 AC_ARG_WITH(boot-ldflags,
1739 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1740                 [linker flags for stage2 and later])],
1741 [if test "$withval" = "no" -o "$withval" = "yes"; then
1742    poststage1_ldflags=
1743  else
1744    poststage1_ldflags=$withval
1745  fi],
1746 [poststage1_ldflags=
1747  # In stages 2 and 3, default to linking libstdc++ and libgcc
1748  # statically.  But if the user explicitly specified the libraries to
1749  # use, trust that they are doing what they want.
1750  if test "$poststage1_libs" = ""; then
1751    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1752  fi])
1753 AC_SUBST(poststage1_ldflags)
1754
1755 # GCC GRAPHITE dependency isl.
1756 # Basic setup is inlined here, actual checks are in config/isl.m4
1757
1758 AC_ARG_WITH(isl,
1759   [AS_HELP_STRING(
1760    [--with-isl=PATH],
1761    [Specify prefix directory for the installed isl package.
1762     Equivalent to --with-isl-include=PATH/include
1763     plus --with-isl-lib=PATH/lib])])
1764
1765 # Treat --without-isl as a request to disable
1766 # GRAPHITE support and skip all following checks.
1767 if test "x$with_isl" != "xno"; then
1768   # Check for isl
1769   dnl Provide configure switches and initialize islinc & isllibs
1770   dnl with user input.
1771   ISL_INIT_FLAGS
1772   dnl The versions of isl that work for Graphite
1773   ISL_CHECK_VERSION()
1774   dnl Only execute fail-action, if isl has been requested.
1775   ISL_IF_FAILED([
1776     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1777 fi
1778
1779 # If the isl check failed, disable builds of in-tree variant of isl
1780 if test "x$with_isl" = xno ||
1781    test "x$gcc_cv_isl" = xno; then
1782   noconfigdirs="$noconfigdirs isl"
1783   islinc=
1784 fi
1785
1786 AC_SUBST(isllibs)
1787 AC_SUBST(islinc)
1788
1789 # Check for LTO support.
1790 AC_ARG_ENABLE(lto,
1791 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1792 enable_lto=$enableval,
1793 enable_lto=yes; default_enable_lto=yes)
1794
1795 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1796   build_lto_plugin=yes
1797 ],[if test x"$default_enable_lto" = x"yes" ; then
1798     case $target in
1799       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1800       # On other non-ELF platforms, LTO has yet to be validated.
1801       *) enable_lto=no ;;
1802     esac
1803   else
1804   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1805   # It would also be nice to check the binutils support, but we don't
1806   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1807   # warn during gcc/ subconfigure; unless you're bootstrapping with
1808   # -flto it won't be needed until after installation anyway.
1809     case $target in
1810       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1811       *) if test x"$enable_lto" = x"yes"; then
1812         AC_MSG_ERROR([LTO support is not enabled for this target.])
1813         fi
1814       ;;
1815     esac
1816   fi
1817   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1818   # Build it unless LTO was explicitly disabled.
1819   case $target in
1820     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1821     *) ;;
1822   esac
1823 ])
1824
1825 AC_ARG_ENABLE(linker-plugin-configure-flags,
1826   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1827     [additional flags for configuring linker plugins @<:@none@:>@])],
1828   extra_linker_plugin_configure_flags=$enableval,
1829   extra_linker_plugin_configure_flags=)
1830 AC_SUBST(extra_linker_plugin_configure_flags)
1831 AC_ARG_ENABLE(linker-plugin-flags,
1832   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1833     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1834   extra_linker_plugin_flags=$enableval,
1835   extra_linker_plugin_flags=)
1836 AC_SUBST(extra_linker_plugin_flags)
1837
1838 # Enable --enable-host-shared.
1839 # Checked early to determine whether jit is an 'all' language
1840 AC_ARG_ENABLE(host-shared,
1841 [AS_HELP_STRING([--enable-host-shared],
1842                 [build host code as shared libraries])],
1843 [host_shared=$enableval], [host_shared=no])
1844 AC_SUBST(host_shared)
1845
1846 # By default, C and C++ are the only stage 1 languages.
1847 stage1_languages=,c,
1848
1849 # Target libraries that we bootstrap.
1850 bootstrap_target_libs=,target-libgcc,
1851
1852 # Figure out what language subdirectories are present.
1853 # Look if the user specified --enable-languages="..."; if not, use
1854 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1855 # go away some day.
1856 # NB:  embedded tabs in this IF block -- do not untabify
1857 if test -d ${srcdir}/gcc; then
1858   if test x"${enable_languages+set}" != xset; then
1859     if test x"${LANGUAGES+set}" = xset; then
1860       enable_languages="${LANGUAGES}"
1861         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1862     else
1863       enable_languages=default
1864     fi
1865   else
1866     if test x"${enable_languages}" = x ||
1867        test x"${enable_languages}" = xyes;
1868        then
1869       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1870       exit 1
1871     fi
1872   fi
1873   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1874
1875   # 'f95' is the old name for the 'fortran' language. We issue a warning
1876   # and make the substitution.
1877   case ,${enable_languages}, in
1878     *,f95,*)
1879       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1880       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1881       ;;
1882   esac
1883
1884   # If bootstrapping, C++ must be enabled.
1885   case ",$enable_languages,:$enable_bootstrap" in
1886     *,c++,*:*) ;;
1887     *:yes)
1888       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1889         enable_languages="${enable_languages},c++"
1890       else
1891         AC_MSG_ERROR([bootstrapping requires c++ sources])
1892       fi
1893       ;;
1894   esac
1895
1896   # First scan to see if an enabled language requires some other language.
1897   # We assume that a given config-lang.in will list all the language
1898   # front ends it requires, even if some are required indirectly.
1899   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1900     case ${lang_frag} in
1901       ..) ;;
1902       # The odd quoting in the next line works around
1903       # an apparent bug in bash 1.12 on linux.
1904       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1905       *)
1906         # From the config-lang.in, get $language, $lang_requires, and
1907         # $lang_requires_boot_languages.
1908         language=
1909         lang_requires=
1910         lang_requires_boot_languages=
1911         # set srcdir during sourcing lang_frag to the gcc dir.
1912         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
1913         # polutes this shell
1914         saved_srcdir=${srcdir}
1915         srcdir=${srcdir}/gcc . ${lang_frag}
1916         srcdir=${saved_srcdir}
1917         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1918           case ,${enable_languages}, in
1919             *,$other,*) ;;
1920             *,default,*) ;;
1921             *,all,*) ;;
1922             *,$language,*)
1923               echo " \`$other' language required by \`$language'; enabling" 1>&2
1924               enable_languages="${enable_languages},${other}"
1925               ;;
1926           esac
1927         done
1928         for other in ${lang_requires_boot_languages} ; do
1929           if test "$other" != "c"; then
1930             case ,${enable_stage1_languages}, in
1931               *,$other,*) ;;
1932               *,default,*) ;;
1933               *,all,*) ;;
1934               *)
1935                 case ,${enable_languages}, in
1936                   *,$language,*)
1937                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1938                     enable_stage1_languages="$enable_stage1_languages,${other}"
1939                     ;;
1940                 esac
1941                 ;;
1942             esac
1943           fi
1944         done
1945         ;;
1946     esac
1947   done
1948
1949   new_enable_languages=,c,
1950
1951   # If LTO is enabled, add the LTO front end.
1952   if test "$enable_lto" = "yes" ; then
1953     case ,${enable_languages}, in
1954       *,lto,*) ;;
1955       *) enable_languages="${enable_languages},lto" ;;
1956     esac
1957     if test "${build_lto_plugin}" = "yes" ; then
1958       configdirs="$configdirs lto-plugin"
1959     fi
1960   fi
1961
1962   # If we're building an offloading compiler, add the LTO front end.
1963   if test x"$enable_as_accelerator_for" != x ; then
1964     case ,${enable_languages}, in
1965       *,lto,*) ;;
1966       *) enable_languages="${enable_languages},lto" ;;
1967     esac
1968   fi
1969
1970   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
1971   potential_languages=,c,
1972
1973   enabled_target_libs=
1974   disabled_target_libs=
1975
1976   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1977     case ${lang_frag} in
1978       ..) ;;
1979       # The odd quoting in the next line works around
1980       # an apparent bug in bash 1.12 on linux.
1981       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1982       *)
1983         # From the config-lang.in, get $language, $target_libs,
1984         # $lang_dirs, $boot_language, and $build_by_default
1985         language=
1986         target_libs=
1987         lang_dirs=
1988         subdir_requires=
1989         boot_language=no
1990         build_by_default=yes
1991         # set srcdir during sourcing.  See above about save & restore
1992         saved_srcdir=${srcdir}
1993         srcdir=${srcdir}/gcc . ${lang_frag}
1994         srcdir=${saved_srcdir}
1995         if test x${language} = x; then
1996           echo "${lang_frag} doesn't set \$language." 1>&2
1997           exit 1
1998         fi
1999
2000         if test "$language" = "c++"; then
2001           boot_language=yes
2002         fi
2003
2004         add_this_lang=no
2005         # C is always enabled, so no need to add it again
2006         if test "$language" != "c"; then
2007           case ,${enable_languages}, in
2008             *,${language},*)
2009               # Language was explicitly selected; include it
2010               add_this_lang=yes
2011               ;;
2012             *,all,*)
2013               # All languages are enabled
2014               add_this_lang=all
2015               ;;
2016             *,default,*)
2017               # 'default' was selected, select it if it is a default language
2018               add_this_lang=${build_by_default}
2019               ;;
2020           esac
2021         fi
2022
2023         # Disable languages that need other directories if these aren't available.
2024         for i in $subdir_requires; do
2025           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2026           case ${add_this_lang} in
2027             yes)
2028               # Specifically requested language; tell them.
2029               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2030               ;;
2031             all)
2032               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2033               add_this_lang=unsupported
2034               ;;
2035             *)
2036               # Silently disable.
2037               add_this_lang=unsupported
2038               ;;
2039           esac
2040         done
2041
2042         # Disable Ada if no preexisting GNAT is available.
2043         case ${add_this_lang}:${language}:${have_gnat} in
2044           yes:ada:no)
2045             # Specifically requested language; tell them.
2046             AC_MSG_ERROR([GNAT is required to build $language])
2047             ;;
2048           all:ada:no)
2049             AC_MSG_WARN([GNAT is required to build $language])
2050             add_this_lang=unsupported
2051             ;;
2052           *:ada:no)
2053             # Silently disable.
2054             add_this_lang=unsupported
2055             ;;
2056         esac
2057
2058         # Disable jit if -enable-host-shared not specified
2059         case ${add_this_lang}:${language}:${host_shared} in
2060           yes:jit:no)
2061             # PR jit/64780: explicitly specify --enable-host-shared
2062             AC_MSG_ERROR([
2063 Enabling language "jit" requires --enable-host-shared.
2064
2065 --enable-host-shared typically slows the rest of the compiler down by
2066 a few %, so you must explicitly enable it.
2067
2068 If you want to build both the jit and the regular compiler, it is often
2069 best to do this via two separate configure/builds, in separate
2070 directories, to avoid imposing the performance cost of
2071 --enable-host-shared on the regular compiler.])
2072             ;;
2073           all:jit:no)
2074             AC_MSG_WARN([--enable-host-shared required to build $language])
2075             add_this_lang=unsupported
2076             ;;
2077           *:jit:no)
2078             # Silently disable.
2079             add_this_lang=unsupported
2080             ;;
2081         esac
2082
2083         # Disable a language that is unsupported by the target.
2084         case "${add_this_lang}: $unsupported_languages " in
2085           no:*) ;;
2086           unsupported:*) ;;
2087           *:*" $language "*)
2088             AC_MSG_WARN([${language} not supported for this target])
2089             add_this_lang=unsupported
2090             ;;
2091         esac
2092
2093         case $add_this_lang in
2094           unsupported)
2095             # Remove language-dependent dirs.
2096             disabled_target_libs="$disabled_target_libs $target_libs"
2097             noconfigdirs="$noconfigdirs $lang_dirs"
2098             ;;
2099           no)
2100             # Remove language-dependent dirs; still show language as supported.
2101             disabled_target_libs="$disabled_target_libs $target_libs"
2102             noconfigdirs="$noconfigdirs $lang_dirs"
2103             potential_languages="${potential_languages}${language},"
2104             ;;
2105           all|yes)
2106             new_enable_languages="${new_enable_languages}${language},"
2107             potential_languages="${potential_languages}${language},"
2108             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2109             enabled_target_libs="$enabled_target_libs $target_libs"
2110             case "${boot_language}:,$enable_stage1_languages," in
2111               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2112                 # Add to (comma-separated) list of stage 1 languages.
2113                 case ",$stage1_languages," in
2114                   *,$language,* | ,yes, | ,all,) ;;
2115                   *) stage1_languages="${stage1_languages}${language}," ;;
2116                 esac
2117                 # We need to bootstrap any supporting libraries.
2118                 bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
2119                 ;;
2120             esac
2121             ;;
2122         esac
2123         ;;
2124     esac
2125   done
2126
2127   # Add target libraries which are only needed for disabled languages
2128   # to noconfigdirs.
2129   if test -n "$disabled_target_libs"; then
2130     for dir in $disabled_target_libs; do
2131       case " $enabled_target_libs " in
2132       *" ${dir} "*) ;;
2133       *) noconfigdirs="$noconfigdirs $dir" ;;
2134       esac
2135     done
2136   fi
2137
2138   AC_ARG_ENABLE(stage1-languages,
2139   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2140                   [choose additional languages to build during
2141                   stage1.  Mostly useful for compiler development])],
2142   [case ,${enable_stage1_languages}, in
2143     ,no,|,,)
2144       # Set it to something that will have no effect in the loop below
2145       enable_stage1_languages=c ;;
2146     ,yes,)
2147       enable_stage1_languages=`echo $new_enable_languages | \
2148         sed -e "s/^,//" -e "s/,$//" ` ;;
2149     *,all,*)
2150       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2151         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2152   esac
2153
2154   # Add "good" languages from enable_stage1_languages to stage1_languages,
2155   # while "bad" languages go in missing_languages.  Leave no duplicates.
2156   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2157     case $potential_languages in
2158       *,$i,*)
2159         case $stage1_languages in
2160           *,$i,*) ;;
2161           *) stage1_languages="$stage1_languages$i," ;;
2162         esac ;;
2163       *)
2164         case $missing_languages in
2165           *,$i,*) ;;
2166           *) missing_languages="$missing_languages$i," ;;
2167         esac ;;
2168      esac
2169   done])
2170
2171   # Remove leading/trailing commas that were added for simplicity
2172   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2173   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2174   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2175   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2176
2177   if test "x$missing_languages" != x; then
2178     AC_MSG_ERROR([
2179 The following requested languages could not be built: ${missing_languages}
2180 Supported languages are: ${potential_languages}])
2181   fi
2182   if test "x$new_enable_languages" != "x$enable_languages"; then
2183     echo The following languages will be built: ${new_enable_languages}
2184     enable_languages="$new_enable_languages"
2185   fi
2186
2187   AC_SUBST(stage1_languages)
2188   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2189 fi
2190
2191 # Handle --disable-<component> generically.
2192 for dir in $configdirs $build_configdirs $target_configdirs ; do
2193   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2194   varname=`echo $dirname | sed -e s/+/_/g`
2195   if eval test x\${enable_${varname}} "=" xno ; then
2196     noconfigdirs="$noconfigdirs $dir"
2197   fi
2198 done
2199
2200 # Check for Boehm's garbage collector
2201 AC_ARG_ENABLE(objc-gc,
2202 [AS_HELP_STRING([--enable-objc-gc],
2203                 [enable use of Boehm's garbage collector with the
2204                  GNU Objective-C runtime])])
2205 AC_ARG_WITH([target-bdw-gc],
2206 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2207                 [specify prefix directory for installed bdw-gc package.
2208                  Equivalent to --with-target-bdw-gc-include=PATH/include
2209                  plus --with-target-bdw-gc-lib=PATH/lib])])
2210 AC_ARG_WITH([target-bdw-gc-include],
2211 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2212                 [specify directories for installed bdw-gc include files])])
2213 AC_ARG_WITH([target-bdw-gc-lib],
2214 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2215                 [specify directories for installed bdw-gc library])])
2216
2217 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2218   AC_MSG_CHECKING([for bdw garbage collector])
2219   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2220     dnl no bdw-gw options, assume default locations
2221     AC_MSG_RESULT([using bdw-gc in default locations])
2222   else
2223     dnl bdw-gw options, first error checking, complete checking in libobjc
2224     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2225       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2226     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2227       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2228     else
2229       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2230     fi
2231   fi
2232 esac
2233
2234 # Disable libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2235 case ,${enable_languages}, in
2236   *,c++,*)
2237     # Disable libitm, libsanitizer if we're not building libstdc++
2238     case "${noconfigdirs}" in
2239       *target-libstdc++-v3*)
2240         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2241         ;;
2242       *) ;;
2243     esac
2244     ;;
2245   *)
2246     noconfigdirs="$noconfigdirs target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2247     ;;
2248 esac
2249
2250 # If gcc/ is not in the source tree then we'll not be building a
2251 # target compiler, assume in that case we don't want to build any
2252 # target libraries or tools.
2253 #
2254 # This was added primarily for the benefit for binutils-gdb who reuse
2255 # this configure script, but don't always have target tools available.
2256 if test ! -d ${srcdir}/gcc; then
2257    skipdirs="${skipdirs} ${target_configdirs}"
2258 fi
2259
2260 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2261 # $build_configdirs and $target_configdirs.
2262 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2263
2264 notsupp=""
2265 for dir in . $skipdirs $noconfigdirs ; do
2266   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2267   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2268     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2269     if test -r $srcdir/$dirname/configure ; then
2270       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2271         true
2272       else
2273         notsupp="$notsupp $dir"
2274       fi
2275     fi
2276   fi
2277   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2278     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2279     if test -r $srcdir/$dirname/configure ; then
2280       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2281         true
2282       else
2283         notsupp="$notsupp $dir"
2284       fi
2285     fi
2286   fi
2287   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2288     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2289     if test -r $srcdir/$dirname/configure ; then
2290       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2291         true
2292       else
2293         notsupp="$notsupp $dir"
2294       fi
2295     fi
2296   fi
2297 done
2298
2299 # Quietly strip out all directories which aren't configurable in this tree.
2300 # This relies on all configurable subdirectories being autoconfiscated, which
2301 # is now the case.
2302 build_configdirs_all="$build_configdirs"
2303 build_configdirs=
2304 for i in ${build_configdirs_all} ; do
2305   j=`echo $i | sed -e s/build-//g`
2306   if test -f ${srcdir}/$j/configure ; then
2307     build_configdirs="${build_configdirs} $i"
2308   fi
2309 done
2310
2311 configdirs_all="$configdirs"
2312 configdirs=
2313 for i in ${configdirs_all} ; do
2314   if test -f ${srcdir}/$i/configure ; then
2315     configdirs="${configdirs} $i"
2316   fi
2317 done
2318
2319 target_configdirs_all="$target_configdirs"
2320 target_configdirs=
2321 for i in ${target_configdirs_all} ; do
2322   j=`echo $i | sed -e s/target-//g`
2323   if test -f ${srcdir}/$j/configure ; then
2324     target_configdirs="${target_configdirs} $i"
2325   fi
2326 done
2327
2328 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2329 # so we have to add it after the preceding checks.
2330 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2331 then
2332   case " $configdirs " in
2333     *" libiberty "*)
2334       # If we can build libiberty, we can also build libiberty-linker-plugin.
2335       configdirs="$configdirs libiberty-linker-plugin"
2336       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2337         --with-libiberty=../libiberty-linker-plugin";;
2338     *)
2339       AC_MSG_ERROR([libiberty missing]);;
2340   esac
2341 fi
2342
2343 # Sometimes we have special requirements for the host libiberty.
2344 extra_host_libiberty_configure_flags=
2345 extra_host_zlib_configure_flags=
2346 case " $configdirs " in
2347   *" lto-plugin "* | *" libcc1 "*)
2348     # When these are to be built as shared libraries, the same applies to
2349     # libiberty.
2350     extra_host_libiberty_configure_flags=--enable-shared
2351     ;;
2352   *" bfd "*)
2353     # When bfd is to be built as a shared library, the same applies to
2354     # zlib.
2355     if test "$enable_shared" = "yes"; then
2356       extra_host_zlib_configure_flags=--enable-host-shared
2357     fi
2358     ;;
2359 esac
2360 AC_SUBST(extra_host_libiberty_configure_flags)
2361 AC_SUBST(extra_host_zlib_configure_flags)
2362
2363 # Produce a warning message for the subdirs we can't configure.
2364 # This isn't especially interesting in the Cygnus tree, but in the individual
2365 # FSF releases, it's important to let people know when their machine isn't
2366 # supported by the one or two programs in a package.
2367
2368 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2369   # If $appdirs is non-empty, at least one of those directories must still
2370   # be configured, or we error out.  (E.g., if the gas release supports a
2371   # specified target in some subdirs but not the gas subdir, we shouldn't
2372   # pretend that all is well.)
2373   if test -n "$appdirs" ; then
2374     for dir in $appdirs ; do
2375       if test -r $dir/Makefile.in ; then
2376         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2377           appdirs=""
2378           break
2379         fi
2380         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2381           appdirs=""
2382           break
2383         fi
2384       fi
2385     done
2386     if test -n "$appdirs" ; then
2387       echo "*** This configuration is not supported by this package." 1>&2
2388       exit 1
2389     fi
2390   fi
2391   # Okay, some application will build, or we don't care to check.  Still
2392   # notify of subdirs not getting built.
2393   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2394   echo "    ${notsupp}" 1>&2
2395   echo "    (Any other directories should still work fine.)" 1>&2
2396 fi
2397
2398 case "$host" in
2399   *msdosdjgpp*)
2400     enable_gdbtk=no ;;
2401 esac
2402
2403 # To find our prefix, in gcc_cv_tool_prefix.
2404 ACX_TOOL_DIRS
2405
2406 copy_dirs=
2407
2408 AC_ARG_WITH([build-sysroot],
2409   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2410                   [use sysroot as the system root during the build])],
2411   [if test x"$withval" != x ; then
2412      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2413    fi],
2414   [SYSROOT_CFLAGS_FOR_TARGET=])
2415 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2416
2417 AC_ARG_WITH([debug-prefix-map],
2418   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2419                   [map A to B, C to D ... in debug information])],
2420   [if test x"$withval" != x; then
2421      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2422      for debug_map in $withval; do
2423        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2424      done
2425    fi],
2426   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2427 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2428
2429 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2430 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2431 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2432 # We want to ensure that TARGET libraries (which we know are built with
2433 # gcc) are built with "-O2 -g", so include those options when setting
2434 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2435 if test "x$CFLAGS_FOR_TARGET" = x; then
2436   if test "x${is_cross_compiler}" = xyes; then
2437     CFLAGS_FOR_TARGET="-g -O2"
2438   else
2439     CFLAGS_FOR_TARGET=$CFLAGS
2440     case " $CFLAGS " in
2441       *" -O2 "*) ;;
2442       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2443     esac
2444     case " $CFLAGS " in
2445       *" -g "* | *" -g3 "*) ;;
2446       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2447     esac
2448   fi
2449 fi
2450 AC_SUBST(CFLAGS_FOR_TARGET)
2451
2452 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2453   if test "x${is_cross_compiler}" = xyes; then
2454     CXXFLAGS_FOR_TARGET="-g -O2"
2455   else
2456     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2457     case " $CXXFLAGS " in
2458       *" -O2 "*) ;;
2459       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2460     esac
2461     case " $CXXFLAGS " in
2462       *" -g "* | *" -g3 "*) ;;
2463       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2464     esac
2465   fi
2466 fi
2467 AC_SUBST(CXXFLAGS_FOR_TARGET)
2468
2469 AC_SUBST(LDFLAGS_FOR_TARGET)
2470
2471 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2472 # the named directory are copied to $(tooldir)/sys-include.
2473 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2474   if test x${is_cross_compiler} = xno ; then
2475     echo 1>&2 '***' --with-headers is only supported when cross compiling
2476     exit 1
2477   fi
2478   if test x"${with_headers}" != xyes ; then
2479     x=${gcc_cv_tool_prefix}
2480     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2481   fi
2482 fi
2483
2484 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2485 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2486 # are permitted.
2487 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2488   if test x${is_cross_compiler} = xno ; then
2489     echo 1>&2 '***' --with-libs is only supported when cross compiling
2490     exit 1
2491   fi
2492   if test x"${with_libs}" != xyes ; then
2493     # Copy the libraries in reverse order, so that files in the first named
2494     # library override files in subsequent libraries.
2495     x=${gcc_cv_tool_prefix}
2496     for l in ${with_libs}; do
2497       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2498     done
2499   fi
2500 fi
2501
2502 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2503 #
2504 # This is done by determining whether or not the appropriate directory
2505 # is available, and by checking whether or not specific configurations
2506 # have requested that this magic not happen.
2507 #
2508 # The command line options always override the explicit settings in
2509 # configure.ac, and the settings in configure.ac override this magic.
2510 #
2511 # If the default for a toolchain is to use GNU as and ld, and you don't
2512 # want to do that, then you should use the --without-gnu-as and
2513 # --without-gnu-ld options for the configure script.  Similarly, if
2514 # the default is to use the included zlib and you don't want to do that,
2515 # you should use the --with-system-zlib option for the configure script.
2516
2517 if test x${use_gnu_as} = x &&
2518    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2519   with_gnu_as=yes
2520   extra_host_args="$extra_host_args --with-gnu-as"
2521 fi
2522
2523 if test x${use_gnu_ld} = x &&
2524    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2525   with_gnu_ld=yes
2526   extra_host_args="$extra_host_args --with-gnu-ld"
2527 fi
2528
2529 if test x${use_included_zlib} = x &&
2530    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2531   :
2532 else
2533   with_system_zlib=yes
2534   extra_host_args="$extra_host_args --with-system-zlib"
2535 fi
2536
2537 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2538 # can detect this case.
2539
2540 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2541   with_newlib=yes
2542   extra_host_args="$extra_host_args --with-newlib"
2543 fi
2544
2545 # Handle ${copy_dirs}
2546 set fnord ${copy_dirs}
2547 shift
2548 while test $# != 0 ; do
2549   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2550     :
2551   else
2552     echo Copying $1 to $2
2553
2554     # Use the install script to create the directory and all required
2555     # parent directories.
2556     if test -d $2 ; then
2557       :
2558     else
2559       echo >config.temp
2560       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2561     fi
2562
2563     # Copy the directory, assuming we have tar.
2564     # FIXME: Should we use B in the second tar?  Not all systems support it.
2565     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2566
2567     # It is the responsibility of the user to correctly adjust all
2568     # symlinks.  If somebody can figure out how to handle them correctly
2569     # here, feel free to add the code.
2570
2571     echo $1 > $2/COPIED
2572   fi
2573   shift; shift
2574 done
2575
2576 # Determine a target-dependent exec_prefix that the installed
2577 # gcc will search in.  Keep this list sorted by triplet, with
2578 # the *-*-osname triplets last.
2579 md_exec_prefix=
2580 case "${target}" in
2581   i[[34567]]86-pc-msdosdjgpp*)
2582     md_exec_prefix=/dev/env/DJDIR/bin
2583     ;;
2584   *-*-hpux* | \
2585   *-*-nto-qnx* | \
2586   *-*-solaris2*)
2587     md_exec_prefix=/usr/ccs/bin
2588     ;;
2589 esac
2590
2591 extra_arflags_for_target=
2592 extra_nmflags_for_target=
2593 extra_ranlibflags_for_target=
2594 target_makefile_frag=/dev/null
2595 case "${target}" in
2596   spu-*-*)
2597     target_makefile_frag="config/mt-spu"
2598     ;;
2599   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2600     target_makefile_frag="config/mt-sde"
2601     ;;
2602   mipsisa*-*-elfoabi*)
2603     target_makefile_frag="config/mt-mips-elfoabi"
2604     ;;
2605   mips*-*-*linux* | mips*-*-gnu*)
2606     target_makefile_frag="config/mt-mips-gnu"
2607     ;;
2608   nios2-*-elf*)
2609     target_makefile_frag="config/mt-nios2-elf"
2610     ;;
2611   *-*-linux-android*)
2612     target_makefile_frag="config/mt-android"
2613     ;;
2614   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2615     target_makefile_frag="config/mt-gnu"
2616     ;;
2617   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2618     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2619     # commands to handle both 32-bit and 64-bit objects.  These flags are
2620     # harmless if we're using GNU nm or ar.
2621     extra_arflags_for_target=" -X32_64"
2622     extra_nmflags_for_target=" -B -X32_64"
2623     ;;
2624 esac
2625
2626 alphaieee_frag=/dev/null
2627 case $target in
2628   alpha*-*-*)
2629     # This just makes sure to use the -mieee option to build target libs.
2630     # This should probably be set individually by each library.
2631     alphaieee_frag="config/mt-alphaieee"
2632     ;;
2633 esac
2634
2635 # If --enable-target-optspace always use -Os instead of -O2 to build
2636 # the target libraries, similarly if it is not specified, use -Os
2637 # on selected platforms.
2638 ospace_frag=/dev/null
2639 case "${enable_target_optspace}:${target}" in
2640   yes:*)
2641     ospace_frag="config/mt-ospace"
2642     ;;
2643   :d30v-*)
2644     ospace_frag="config/mt-d30v"
2645     ;;
2646   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2647     ospace_frag="config/mt-ospace"
2648     ;;
2649   no:* | :*)
2650     ;;
2651   *)
2652     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2653     ;;
2654 esac
2655
2656 # Some systems (e.g., one of the i386-aix systems the gas testers are
2657 # using) don't handle "\$" correctly, so don't use it here.
2658 tooldir='${exec_prefix}'/${target_noncanonical}
2659 build_tooldir=${tooldir}
2660
2661 # Create a .gdbinit file which runs the one in srcdir
2662 # and tells GDB to look there for source files.
2663
2664 if test -r ${srcdir}/.gdbinit ; then
2665   case ${srcdir} in
2666     .) ;;
2667     *) cat > ./.gdbinit <<EOF
2668 # ${NO_EDIT}
2669 dir ${srcdir}
2670 dir .
2671 source ${srcdir}/.gdbinit
2672 EOF
2673     ;;
2674   esac
2675 fi
2676
2677 # Make sure that the compiler is able to generate an executable.  If it
2678 # can't, we are probably in trouble.  We don't care whether we can run the
2679 # executable--we might be using a cross compiler--we only care whether it
2680 # can be created.  At this point the main configure script has set CC.
2681 we_are_ok=no
2682 echo "int main () { return 0; }" > conftest.c
2683 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2684 if test $? = 0 ; then
2685   if test -s conftest || test -s conftest.exe ; then
2686     we_are_ok=yes
2687   fi
2688 fi
2689 case $we_are_ok in
2690   no)
2691     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2692     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2693     rm -f conftest*
2694     exit 1
2695     ;;
2696 esac
2697 rm -f conftest*
2698
2699 # Decide which environment variable is used to find dynamic libraries.
2700 case "${host}" in
2701   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2702   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2703   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2704   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2705 esac
2706
2707 # On systems where the dynamic library environment variable is PATH,
2708 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2709 # built executables to PATH.
2710 if test "$RPATH_ENVVAR" = PATH; then
2711   GCC_SHLIB_SUBDIR=/shlib
2712 else
2713   GCC_SHLIB_SUBDIR=
2714 fi
2715
2716 # Adjust the toplevel makefile according to whether bootstrap was selected.
2717 case $enable_bootstrap in
2718   yes)
2719     bootstrap_suffix=bootstrap
2720     BUILD_CONFIG=bootstrap-debug
2721     ;;
2722   no)
2723     bootstrap_suffix=no-bootstrap
2724     BUILD_CONFIG=
2725     ;;
2726 esac
2727
2728 AC_MSG_CHECKING(for default BUILD_CONFIG)
2729
2730 AC_ARG_WITH([build-config],
2731   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2732                   [use config/NAME.mk build configuration])],
2733   [case $with_build_config in
2734    yes) with_build_config= ;;
2735    no) with_build_config= BUILD_CONFIG= ;;
2736    esac])
2737
2738 if test "x${with_build_config}" != x; then
2739   BUILD_CONFIG=$with_build_config
2740 else
2741   case $BUILD_CONFIG in
2742   bootstrap-debug)
2743     if echo "int f (void) { return 0; }" > conftest.c &&
2744        ${CC} -c conftest.c &&
2745        mv conftest.o conftest.o.g0 &&
2746        ${CC} -c -g conftest.c &&
2747        mv conftest.o conftest.o.g &&
2748        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2749       :
2750     else
2751       BUILD_CONFIG=
2752     fi
2753     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2754     ;;
2755   esac
2756 fi
2757 AC_MSG_RESULT($BUILD_CONFIG)
2758 AC_SUBST(BUILD_CONFIG)
2759
2760 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2761 AC_MSG_CHECKING([for --enable-vtable-verify])
2762 AC_ARG_ENABLE(vtable-verify,
2763 [AS_HELP_STRING([--enable-vtable-verify],
2764                 [Enable vtable verification feature])],
2765 [case "$enableval" in
2766  yes) enable_vtable_verify=yes ;;
2767  no)  enable_vtable_verify=no ;;
2768  *)   enable_vtable_verify=no;;
2769  esac],
2770 [enable_vtable_verify=no])
2771 AC_MSG_RESULT($enable_vtable_verify)
2772
2773 # Record target_configdirs and the configure arguments for target and
2774 # build configuration in Makefile.
2775 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2776 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2777 bootstrap_fixincludes=no
2778
2779 # If we are building libgomp, bootstrap it.
2780 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2781   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2782 fi
2783
2784 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2785 # or bootstrap-ubsan, bootstrap it.
2786 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2787   case "$BUILD_CONFIG" in
2788     *bootstrap-asan* | *bootstrap-ubsan* )
2789       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2790       bootstrap_fixincludes=yes
2791       ;;
2792   esac
2793 fi
2794
2795 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2796 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2797    test "$enable_vtable_verify" != no; then
2798   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2799 fi
2800
2801 # Determine whether gdb needs tk/tcl or not.
2802 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2803 # and in that case we want gdb to be built without tk.  Ugh!
2804 # In fact I believe gdb is the *only* package directly dependent on tk,
2805 # so we should be able to put the 'maybe's in unconditionally and
2806 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2807 # 100% sure that that's safe though.
2808
2809 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2810 case "$enable_gdbtk" in
2811   no)
2812     GDB_TK="" ;;
2813   yes)
2814     GDB_TK="${gdb_tk}" ;;
2815   *)
2816     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2817     # distro.  Eventually someone will fix this and move Insight, nee
2818     # gdbtk to a separate directory.
2819     if test -d ${srcdir}/gdb/gdbtk ; then
2820       GDB_TK="${gdb_tk}"
2821     else
2822       GDB_TK=""
2823     fi
2824     ;;
2825 esac
2826 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2827 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2828
2829 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
2830 # else does, only include them if one of these is built.  The Makefile
2831 # provides the ordering, so it's enough here to add to the list.
2832 case " ${configdirs} " in
2833   *\ gdb\ *)
2834     configdirs="${configdirs} gnulib gdbsupport"
2835     ;;
2836   *\ gdbserver\ *)
2837     configdirs="${configdirs} gnulib gdbsupport"
2838     ;;
2839   *\ sim\ *)
2840     configdirs="${configdirs} gnulib"
2841     ;;
2842 esac
2843
2844 # Strip out unwanted targets.
2845
2846 # While at that, we remove Makefiles if we were started for recursive
2847 # configuration, so that the top-level Makefile reconfigures them,
2848 # like we used to do when configure itself was recursive.
2849
2850 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2851 # but now we're fixing up the Makefile ourselves with the additional
2852 # commands passed to AC_CONFIG_FILES.  Use separate variables
2853 # extrasub-{build,host,target} not because there is any reason to split
2854 # the substitutions up that way, but only to remain below the limit of
2855 # 99 commands in a script, for HP-UX sed.
2856
2857 # Do not nest @if/@endif or @unless/@endunless pairs, because
2858 # configure will not warn you at all.
2859
2860 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2861   yes:yes:*\ gold\ *:*,c++,*) ;;
2862   yes:yes:*\ gold\ *:*)
2863     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2864     ;;
2865 esac
2866
2867 extrasub_build=
2868 for module in ${build_configdirs} ; do
2869   if test -z "${no_recursion}" \
2870      && test -f ${build_subdir}/${module}/Makefile; then
2871     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2872     rm -f ${build_subdir}/${module}/Makefile
2873   fi
2874   extrasub_build="$extrasub_build
2875 /^@if build-$module\$/d
2876 /^@endif build-$module\$/d
2877 /^@unless build-$module\$/,/^@endunless build-$module\$/d
2878 /^@if build-$module-$bootstrap_suffix\$/d
2879 /^@endif build-$module-$bootstrap_suffix\$/d
2880 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
2881 done
2882 extrasub_host=
2883 for module in ${configdirs} ; do
2884   if test -z "${no_recursion}"; then
2885     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2886       if test -f ${file}; then
2887         echo 1>&2 "*** removing ${file} to force reconfigure"
2888         rm -f ${file}
2889       fi
2890     done
2891   fi
2892   case ${module},${bootstrap_fixincludes} in
2893     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2894     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2895   esac
2896   extrasub_host="$extrasub_host
2897 /^@if $module\$/d
2898 /^@endif $module\$/d
2899 /^@unless $module\$/,/^@endunless $module\$/d
2900 /^@if $module-$host_bootstrap_suffix\$/d
2901 /^@endif $module-$host_bootstrap_suffix\$/d
2902 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
2903 done
2904 extrasub_target=
2905 for module in ${target_configdirs} ; do
2906   if test -z "${no_recursion}" \
2907      && test -f ${target_subdir}/${module}/Makefile; then
2908     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2909     rm -f ${target_subdir}/${module}/Makefile
2910   fi
2911
2912   # We only bootstrap target libraries listed in bootstrap_target_libs.
2913   case $bootstrap_target_libs in
2914     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2915     *) target_bootstrap_suffix=no-bootstrap ;;
2916   esac
2917
2918   extrasub_target="$extrasub_target
2919 /^@if target-$module\$/d
2920 /^@endif target-$module\$/d
2921 /^@unless target-$module\$/,/^@endunless target-$module\$/d
2922 /^@if target-$module-$target_bootstrap_suffix\$/d
2923 /^@endif target-$module-$target_bootstrap_suffix\$/d
2924 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
2925 done
2926
2927 # Do the final fixup along with target modules.
2928 extrasub_target="$extrasub_target
2929 /^@if /,/^@endif /d
2930 /^@unless /d
2931 /^@endunless /d"
2932
2933 if test "$enable_pgo_build" != "no"; then
2934   extrasub_build="$extrasub_build
2935 /^@if pgo-build\$/d
2936 /^@endif pgo-build\$/d"
2937 fi
2938
2939 # Create the serialization dependencies.  This uses a temporary file.
2940
2941 AC_ARG_ENABLE([serial-configure],
2942 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
2943                 [force sequential configuration of
2944                  sub-packages for the host, target or build
2945                  machine, or all sub-packages])])
2946
2947 case ${enable_serial_configure} in
2948   yes)
2949     enable_serial_build_configure=yes
2950     enable_serial_host_configure=yes
2951     enable_serial_target_configure=yes
2952     ;;
2953 esac
2954
2955 # These force 'configure's to be done one at a time, to avoid problems
2956 # with contention over a shared config.cache.
2957 rm -f serdep.tmp
2958 echo '# serdep.tmp' > serdep.tmp
2959 olditem=
2960 test "x${enable_serial_build_configure}" = xyes &&
2961 for item in ${build_configdirs} ; do
2962   case ${olditem} in
2963     "") ;;
2964     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
2965   esac
2966   olditem=${item}
2967 done
2968 olditem=
2969 test "x${enable_serial_host_configure}" = xyes &&
2970 for item in ${configdirs} ; do
2971   case ${olditem} in
2972     "") ;;
2973     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
2974   esac
2975   olditem=${item}
2976 done
2977 olditem=
2978 test "x${enable_serial_target_configure}" = xyes &&
2979 for item in ${target_configdirs} ; do
2980   case ${olditem} in
2981     "") ;;
2982     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
2983   esac
2984   olditem=${item}
2985 done
2986 serialization_dependencies=serdep.tmp
2987 AC_SUBST_FILE(serialization_dependencies)
2988
2989 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
2990 # target, nonopt, and variable assignments.  These are the ones we
2991 # might not want to pass down to subconfigures.  The exception being
2992 # --cache-file=/dev/null, which is used to turn off the use of cache
2993 # files altogether, and which should be passed on to subconfigures.
2994 # Also strip program-prefix, program-suffix, and program-transform-name,
2995 # so that we can pass down a consistent program-transform-name.
2996 baseargs=
2997 tbaseargs=
2998 keep_next=no
2999 skip_next=no
3000 eval "set -- $ac_configure_args"
3001 for ac_arg
3002 do
3003   if test X"$skip_next" = X"yes"; then
3004     skip_next=no
3005     continue
3006   fi
3007   if test X"$keep_next" = X"yes"; then
3008     case $ac_arg in
3009       *\'*)
3010         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3011     esac
3012     baseargs="$baseargs '$ac_arg'"
3013     tbaseargs="$tbaseargs '$ac_arg'"
3014     keep_next=no
3015     continue
3016   fi
3017
3018   # Handle separated arguments.  Based on the logic generated by
3019   # autoconf 2.59.
3020   case $ac_arg in
3021     *=* | --config-cache | -C | -disable-* | --disable-* \
3022       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3023       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3024       | -with-* | --with-* | -without-* | --without-* | --x)
3025       separate_arg=no
3026       ;;
3027     -*)
3028       separate_arg=yes
3029       ;;
3030     *)
3031       separate_arg=no
3032       ;;
3033   esac
3034
3035   skip_targ=no
3036   case $ac_arg in
3037 changequote(,)
3038   --with-* | --without-*)
3039     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3040
3041     case $libopt in
3042     *[-_]include)
3043       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3044       ;;
3045     *[-_]lib)
3046       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3047       ;;
3048     *)
3049       lib=$libopt
3050       ;;
3051     esac
3052 changequote([,])
3053
3054     case $lib in
3055     mpc | mpfr | gmp | isl)
3056       # If we're processing --with-$lib, --with-$lib-include or
3057       # --with-$lib-lib, for one of the libs above, and target is
3058       # different from host, don't pass the current argument to any
3059       # target library's configure.
3060       if test x$is_cross_compiler = xyes; then
3061         skip_targ=yes
3062       fi
3063       ;;
3064     esac
3065     ;;
3066   esac
3067
3068   case "$ac_arg" in
3069     --cache-file=/dev/null | \
3070     -cache-file=/dev/null )
3071       # Handled here to avoid the test to skip args below.
3072       baseargs="$baseargs '$ac_arg'"
3073       tbaseargs="$tbaseargs '$ac_arg'"
3074       # Assert: $separate_arg should always be no.
3075       keep_next=$separate_arg
3076       ;;
3077     --no*)
3078       continue
3079       ;;
3080     --c* | \
3081     --sr* | \
3082     --ho* | \
3083     --bu* | \
3084     --t* | \
3085     --program-* | \
3086     -cache_file* | \
3087     -srcdir* | \
3088     -host* | \
3089     -build* | \
3090     -target* | \
3091     -program-prefix* | \
3092     -program-suffix* | \
3093     -program-transform-name* )
3094       skip_next=$separate_arg
3095       continue
3096       ;;
3097     -*)
3098       # An option.  Add it.
3099       case $ac_arg in
3100         *\'*)
3101           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3102       esac
3103       baseargs="$baseargs '$ac_arg'"
3104       if test X"$skip_targ" = Xno; then
3105         tbaseargs="$tbaseargs '$ac_arg'"
3106       fi
3107       keep_next=$separate_arg
3108       ;;
3109     *)
3110       # Either a variable assignment, or a nonopt (triplet).  Don't
3111       # pass it down; let the Makefile handle this.
3112       continue
3113       ;;
3114   esac
3115 done
3116 # Remove the initial space we just introduced and, as these will be
3117 # expanded by make, quote '$'.
3118 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3119
3120 # Add in --program-transform-name, after --program-prefix and
3121 # --program-suffix have been applied to it.  Autoconf has already
3122 # doubled dollar signs and backslashes in program_transform_name; we want
3123 # the backslashes un-doubled, and then the entire thing wrapped in single
3124 # quotes, because this will be expanded first by make and then by the shell.
3125 # Also, because we want to override the logic in subdir configure scripts to
3126 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3127 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3128 ${program_transform_name}
3129 EOF_SED
3130 gcc_transform_name=`cat conftestsed.out`
3131 rm -f conftestsed.out
3132 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3133 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3134 if test "$silent" = yes; then
3135   baseargs="$baseargs --silent"
3136   tbaseargs="$tbaseargs --silent"
3137 fi
3138 baseargs="$baseargs --disable-option-checking"
3139 tbaseargs="$tbaseargs --disable-option-checking"
3140
3141 # Record and document user additions to sub configure arguments.
3142 AC_ARG_VAR([build_configargs],
3143            [additional configure arguments for build directories])
3144 AC_ARG_VAR([host_configargs],
3145            [additional configure arguments for host directories])
3146 AC_ARG_VAR([target_configargs],
3147            [additional configure arguments for target directories])
3148
3149 # For the build-side libraries, we just need to pretend we're native,
3150 # and not use the same cache file.  Multilibs are neither needed nor
3151 # desired.  We can't even use the same cache file for all build-side
3152 # libraries, as they're compiled differently; some with C, some with
3153 # C++ or with different feature-enabling options.
3154 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3155
3156 # For host modules, accept cache file option, or specification as blank.
3157 case "${cache_file}" in
3158 "") # empty
3159   cache_file_option="" ;;
3160 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3161   cache_file_option="--cache-file=${cache_file}" ;;
3162 *) # relative path
3163   cache_file_option="--cache-file=../${cache_file}" ;;
3164 esac
3165
3166 # Host dirs don't like to share a cache file either, horribly enough.
3167 # This seems to be due to autoconf 2.5x stupidity.
3168 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3169
3170 target_configargs="$target_configargs ${tbaseargs}"
3171
3172 # Passing a --with-cross-host argument lets the target libraries know
3173 # whether they are being built with a cross-compiler or being built
3174 # native.  However, it would be better to use other mechanisms to make the
3175 # sorts of decisions they want to make on this basis.  Please consider
3176 # this option to be deprecated.  FIXME.
3177 if test x${is_cross_compiler} = xyes ; then
3178   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3179 fi
3180
3181 # Special user-friendly check for native x86_64-linux build, if
3182 # multilib is not explicitly enabled.
3183 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3184   x86_64-*linux*:yes:$build:$build:)
3185     # Make sure we have a development environment that handles 32-bit
3186     dev64=no
3187     echo "int main () { return 0; }" > conftest.c
3188     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3189     if test $? = 0 ; then
3190       if test -s conftest || test -s conftest.exe ; then
3191         dev64=yes
3192       fi
3193     fi
3194     rm -f conftest*
3195     if test x${dev64} != xyes ; then
3196       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.])
3197     fi
3198     ;;
3199 esac
3200
3201 # Default to --enable-multilib.
3202 if test x${enable_multilib} = x ; then
3203   target_configargs="--enable-multilib ${target_configargs}"
3204 fi
3205
3206 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3207 # changed from the earlier setting of with_newlib.
3208 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3209   target_configargs="--with-newlib ${target_configargs}"
3210 fi
3211
3212 # Different target subdirs use different values of certain variables
3213 # (notably CXX).  Worse, multilibs use *lots* of different values.
3214 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3215 # it doesn't automatically accept command-line overrides of them.
3216 # This means it's not safe for target subdirs to share a cache file,
3217 # which is disgusting, but there you have it.  Hopefully this can be
3218 # fixed in future.  It's still worthwhile to use a cache file for each
3219 # directory.  I think.
3220
3221 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3222 # We need to pass --target, as newer autoconf's requires consistency
3223 # for target_alias and gcc doesn't manage it consistently.
3224 target_configargs="--cache-file=./config.cache ${target_configargs}"
3225
3226 FLAGS_FOR_TARGET=
3227 case " $target_configdirs " in
3228  *" newlib "*)
3229   case " $target_configargs " in
3230   *" --with-newlib "*)
3231    case "$target" in
3232     *-cygwin*)
3233       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3234       ;;
3235    esac
3236
3237    # If we're not building GCC, don't discard standard headers.
3238    if test -d ${srcdir}/gcc; then
3239      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3240
3241      if test "${build}" != "${host}"; then
3242        # On Canadian crosses, CC_FOR_TARGET will have already been set
3243        # by `configure', so we won't have an opportunity to add -Bgcc/
3244        # to it.  This is right: we don't want to search that directory
3245        # for binaries, but we want the header files in there, so add
3246        # them explicitly.
3247        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3248
3249        # Someone might think of using the pre-installed headers on
3250        # Canadian crosses, in case the installed compiler is not fully
3251        # compatible with the compiler being built.  In this case, it
3252        # would be better to flag an error than risking having
3253        # incompatible object files being constructed.  We can't
3254        # guarantee that an error will be flagged, but let's hope the
3255        # compiler will do it, when presented with incompatible header
3256        # files.
3257      fi
3258    fi
3259
3260    case "${target}-${is_cross_compiler}" in
3261    i[[3456789]]86-*-linux*-no)
3262       # Here host == target, so we don't need to build gcc,
3263       # so we don't want to discard standard headers.
3264       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3265       ;;
3266    *)
3267       # If we're building newlib, use its generic headers last, but search
3268       # for any libc-related directories first (so make it the last -B
3269       # switch).
3270       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3271
3272       # If we're building libgloss, find the startup file, simulator library
3273       # and linker script.
3274       case " $target_configdirs " in
3275         *" libgloss "*)
3276         # Look for startup file, simulator library and maybe linker script.
3277         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3278         # Look for libnosys.a in case the target needs it.
3279         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3280         # Most targets have the linker script in the source directory.
3281         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3282         ;;
3283       esac
3284       ;;
3285    esac
3286    ;;
3287   esac
3288   ;;
3289 esac
3290
3291 case "$target" in
3292   x86_64-*mingw* | *-w64-mingw*)
3293   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3294   # however, use a symlink named 'mingw' in ${prefix} .
3295     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3296     ;;
3297   *-mingw*)
3298   # MinGW can't be handled as Cygwin above since it does not use newlib.
3299     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3300     ;;
3301 esac
3302
3303 # Allow the user to override the flags for
3304 # our build compiler if desired.
3305 if test x"${build}" = x"${host}" ; then
3306   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3307   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3308   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3309 fi
3310
3311 # On Canadian crosses, we'll be searching the right directories for
3312 # the previously-installed cross compiler, so don't bother to add
3313 # flags for directories within the install tree of the compiler
3314 # being built; programs in there won't even run.
3315 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3316   # Search for pre-installed headers if nothing else fits.
3317   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3318 fi
3319
3320 if test "x${use_gnu_ld}" = x &&
3321    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3322   # Arrange for us to find uninstalled linker scripts.
3323   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3324 fi
3325
3326 # Search for other target-specific linker scripts and such.
3327 case "${target}" in
3328   mep*)
3329     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3330     ;;
3331 esac
3332
3333 # Makefile fragments.
3334 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3335 do
3336   eval fragval=\$$frag
3337   if test $fragval != /dev/null; then
3338     eval $frag=${srcdir}/$fragval
3339   fi
3340 done
3341 AC_SUBST_FILE(host_makefile_frag)
3342 AC_SUBST_FILE(target_makefile_frag)
3343 AC_SUBST_FILE(alphaieee_frag)
3344 AC_SUBST_FILE(ospace_frag)
3345
3346 # Miscellanea: directories, flags, etc.
3347 AC_SUBST(RPATH_ENVVAR)
3348 AC_SUBST(GCC_SHLIB_SUBDIR)
3349 AC_SUBST(tooldir)
3350 AC_SUBST(build_tooldir)
3351 AC_SUBST(CONFIGURE_GDB_TK)
3352 AC_SUBST(GDB_TK)
3353 AC_SUBST(INSTALL_GDB_TK)
3354
3355 # Build module lists & subconfigure args.
3356 AC_SUBST(build_configargs)
3357 AC_SUBST(build_configdirs)
3358
3359 # Host module lists & subconfigure args.
3360 AC_SUBST(host_configargs)
3361 AC_SUBST(configdirs)
3362 AC_SUBST(target_configdirs)
3363
3364 # Target module lists & subconfigure args.
3365 AC_SUBST(target_configargs)
3366
3367
3368 # Build tools.
3369 AC_SUBST(AR_FOR_BUILD)
3370 AC_SUBST(AS_FOR_BUILD)
3371 AC_SUBST(CC_FOR_BUILD)
3372 AC_SUBST(CFLAGS_FOR_BUILD)
3373 AC_SUBST(CXXFLAGS_FOR_BUILD)
3374 AC_SUBST(CXX_FOR_BUILD)
3375 AC_SUBST(DLLTOOL_FOR_BUILD)
3376 AC_SUBST(GFORTRAN_FOR_BUILD)
3377 AC_SUBST(GOC_FOR_BUILD)
3378 AC_SUBST(LDFLAGS_FOR_BUILD)
3379 AC_SUBST(LD_FOR_BUILD)
3380 AC_SUBST(NM_FOR_BUILD)
3381 AC_SUBST(RANLIB_FOR_BUILD)
3382 AC_SUBST(WINDMC_FOR_BUILD)
3383 AC_SUBST(WINDRES_FOR_BUILD)
3384
3385 # Generate default definitions for YACC, M4, LEX and other programs that run
3386 # on the build machine.  These are used if the Makefile can't locate these
3387 # programs in objdir.
3388 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3389
3390 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3391 case " $build_configdirs " in
3392   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3393 esac
3394
3395 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3396 case " $build_configdirs " in
3397   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3398 esac
3399
3400 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3401 case " $build_configdirs " in
3402   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3403 esac
3404
3405 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3406 case " $build_configdirs " in
3407   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3408   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3409 esac
3410
3411 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3412 case " $build_configdirs " in
3413   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3414 esac
3415
3416 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3417 case " $build_configdirs " in
3418   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3419   *)
3420 changequote(,)
3421     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3422     # higher, else we use the "missing" dummy.
3423     if ${MAKEINFO} --version \
3424        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3425       :
3426     else
3427       MAKEINFO="$MISSING makeinfo"
3428     fi
3429     ;;
3430 changequote([,])
3431 esac
3432
3433 # FIXME: expect and dejagnu may become build tools?
3434
3435 AC_CHECK_PROGS(EXPECT, expect, expect)
3436 case " $configdirs " in
3437   *" expect "*)
3438     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3439     ;;
3440 esac
3441
3442 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3443 case " $configdirs " in
3444   *" dejagnu "*)
3445     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3446     ;;
3447 esac
3448
3449
3450 # Host tools.
3451 NCN_STRICT_CHECK_TOOLS(AR, ar)
3452 NCN_STRICT_CHECK_TOOLS(AS, as)
3453 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3454 NCN_STRICT_CHECK_TOOLS(LD, ld)
3455 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3456 NCN_STRICT_CHECK_TOOLS(NM, nm)
3457 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3458 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3459 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3460 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3461 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3462 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3463 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3464 AC_SUBST(CC)
3465 AC_SUBST(CXX)
3466 AC_SUBST(CFLAGS)
3467 AC_SUBST(CXXFLAGS)
3468 AC_SUBST(PKG_CONFIG_PATH)
3469
3470 GCC_PLUGIN_OPTION(PLUGIN_OPTION)
3471 AR_PLUGIN_OPTION=
3472 RANLIB_PLUGIN_OPTION=
3473 if test -n "$PLUGIN_OPTION"; then
3474   if $AR --help 2>&1 | grep -q "\--plugin"; then
3475     AR_PLUGIN_OPTION="$PLUGIN_OPTION"
3476   fi
3477   if $RANLIB --help 2>&1 | grep -q "\--plugin"; then
3478     RANLIB_PLUGIN_OPTION="$PLUGIN_OPTION"
3479   fi
3480 else
3481   if test "$enable_pgo_build" != "no"; then
3482     AC_MSG_ERROR([AR with --plugin and rc is required for LTO build])
3483   fi
3484 fi
3485 AC_SUBST(AR_PLUGIN_OPTION)
3486 AC_SUBST(RANLIB_PLUGIN_OPTION)
3487
3488 # Target tools.
3489 AC_ARG_WITH([build-time-tools],
3490   [AS_HELP_STRING([--with-build-time-tools=PATH],
3491                   [use given path to find target tools during the build])],
3492   [case x"$withval" in
3493      x/*) ;;
3494      *)
3495        with_build_time_tools=
3496        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3497        ;;
3498    esac],
3499   [with_build_time_tools=])
3500
3501 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3502 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3503 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3504 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3505 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3506
3507 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3508 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3509 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3510 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3511 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3512 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3513 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3514 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3515 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3516 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3517 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3518 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3519 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3520
3521 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3522
3523 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3524 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3525 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3526 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3527 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3528                 [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],
3529                 c++)
3530 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3531                 [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],
3532                 c++)
3533 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3534 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3535 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3536                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3537 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3538                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3539 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3540 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3541 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3542 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3543 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3544 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3545 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3546 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3547 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3548 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3549
3550 AC_SUBST(FLAGS_FOR_TARGET)
3551 AC_SUBST(RAW_CXX_FOR_TARGET)
3552
3553 # Certain tools may need extra flags.
3554 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3555 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3556 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3557
3558 # When building target libraries, except in a Canadian cross, we use
3559 # the same toolchain as the compiler we just built.
3560 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3561 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3562 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3563 if test $host = $build; then
3564   case " $configdirs " in
3565     *" gcc "*)
3566       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3567       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3568       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3569       ;;
3570   esac
3571 fi
3572
3573 AC_SUBST(COMPILER_AS_FOR_TARGET)
3574 AC_SUBST(COMPILER_LD_FOR_TARGET)
3575 AC_SUBST(COMPILER_NM_FOR_TARGET)
3576
3577 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3578 AC_ARG_ENABLE(maintainer-mode,
3579 [AS_HELP_STRING([--enable-maintainer-mode],
3580                 [enable make rules and dependencies not useful
3581                  (and sometimes confusing) to the casual installer])],
3582       USE_MAINTAINER_MODE=$enableval,
3583       USE_MAINTAINER_MODE=no)
3584 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3585 AC_SUBST(MAINTAINER_MODE_TRUE)
3586 AC_SUBST(MAINTAINER_MODE_FALSE)
3587 if test "$USE_MAINTAINER_MODE" = yes; then
3588   MAINTAINER_MODE_TRUE=
3589   MAINTAINER_MODE_FALSE='#'
3590 else
3591   MAINTAINER_MODE_TRUE='#'
3592   MAINTAINER_MODE_FALSE=
3593 fi
3594 MAINT=$MAINTAINER_MODE_TRUE
3595 AC_SUBST(MAINT)dnl
3596
3597 # ---------------------
3598 # GCC bootstrap support
3599 # ---------------------
3600
3601 # Stage specific cflags for build.
3602 stage1_cflags="-g"
3603 case $build in
3604   vax-*-*)
3605     case ${GCC} in
3606       yes) stage1_cflags="-g -Wa,-J" ;;
3607       *) stage1_cflags="-g -J" ;;
3608     esac ;;
3609 esac
3610
3611 AC_SUBST(stage1_cflags)
3612
3613 # Enable --enable-checking in stage1 of the compiler.
3614 AC_ARG_ENABLE(stage1-checking,
3615 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3616                 [choose additional checking for stage1 of the compiler])],
3617 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3618 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3619   # For --disable-checking or implicit --enable-checking=release, avoid
3620   # setting --enable-checking=gc in the default stage1 checking for LTO
3621   # bootstraps.  See PR62077.
3622   case $BUILD_CONFIG in
3623     *lto*)
3624       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3625     *)
3626       stage1_checking=--enable-checking=yes,types;;
3627   esac
3628   if test "x$enable_checking" = x && \
3629      test -d ${srcdir}/gcc && \
3630      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3631     stage1_checking=--enable-checking=yes,types,extra
3632   fi
3633 else
3634   stage1_checking=--enable-checking=$enable_checking,types
3635 fi])
3636 AC_SUBST(stage1_checking)
3637
3638 # Enable -Werror in bootstrap stage2 and later.
3639 AC_ARG_ENABLE(werror,
3640 [AS_HELP_STRING([--enable-werror],
3641                 [enable -Werror in bootstrap stage2 and later])],
3642 [
3643 case ${enable_werror} in
3644   yes) stage2_werror_flag="--enable-werror-always" ;;
3645   *) stage2_werror_flag="" ;;
3646 esac
3647 ],
3648 [
3649 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3650   case $BUILD_CONFIG in
3651   bootstrap-debug)
3652       stage2_werror_flag="--enable-werror-always" ;;
3653   "")
3654       stage2_werror_flag="--enable-werror-always" ;;
3655   esac
3656 fi
3657 ])
3658
3659 AC_SUBST(stage2_werror_flag)
3660
3661 # Specify what files to not compare during bootstrap.
3662
3663 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3664 case "$target" in
3665   hppa*64*-*-hpux*) ;;
3666   hppa*-*-hpux*) compare_exclusions="gcc/cc*-checksum\$(objext) | */libgcc/lib2funcs* | gcc/ada/*tools/* | gcc/function-tests.o" ;;
3667   powerpc*-ibm-aix*) compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/* | *libgomp*\$(objext)" ;;
3668 esac
3669 AC_SUBST(compare_exclusions)
3670
3671 AC_CONFIG_FILES([Makefile],
3672   [sed "$extrasub_build" Makefile |
3673    sed "$extrasub_host" |
3674    sed "$extrasub_target" > mf$$
3675    mv -f mf$$ Makefile],
3676   [extrasub_build="$extrasub_build"
3677    extrasub_host="$extrasub_host"
3678    extrasub_target="$extrasub_target"])
3679 AC_OUTPUT