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 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/ax_cxx_compile_stdcxx.m4)
  27 m4_include(config/gcc-plugin.m4)
  28 m4_include([libtool.m4])
  29 m4_include([ltoptions.m4])
  30 m4_include([ltsugar.m4])
  31 m4_include([ltversion.m4])
  32 m4_include([lt~obsolete.m4])
  33 m4_include([config/isl.m4])
  34
  35 AC_INIT(move-if-change)
  36 AC_DISABLE_OPTION_CHECKING
  37
  38 progname=$0
  39 # if PWD already has a value, it is probably wrong.
  40 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  41
  42 # Export original configure arguments for use by sub-configures.
  43 # Quote arguments with shell meta charatcers.
  44 TOPLEVEL_CONFIGURE_ARGUMENTS=
  45 set -- "$progname" "$@"
  46 for ac_arg
  47 do
  48   case "$ac_arg" in
  49   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  50     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  51     # if the argument is of the form -foo=baz, quote the baz part only
  52     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  53   *) ;;
  54   esac
  55   # Add the quoted argument to the list.
  56   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  57 done
  58 if test "$silent" = yes; then
  59   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  60 fi
  61 # Remove the initial space we just introduced and, as these will be
  62 # expanded by make, quote '$'.
  63 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  64 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  65
  66 # Find the build, host, and target systems.
  67 ACX_NONCANONICAL_BUILD
  68 ACX_NONCANONICAL_HOST
  69 ACX_NONCANONICAL_TARGET
  70
  71 dnl Autoconf 2.5x and later will set a default program prefix if
  72 dnl --target was used, even if it was the same as --host.  Disable
  73 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  74 dnl to take effect.
  75 test "$host_noncanonical" = "$target_noncanonical" &&
  76   test "$program_prefix$program_suffix$program_transform_name" = \
  77     NONENONEs,x,x, &&
  78   program_transform_name=s,y,y,
  79
  80 AC_CANONICAL_SYSTEM
  81 AC_ARG_PROGRAM
  82
  83 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  84 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  85
  86 # Get 'install' or 'install-sh' and its variants.
  87 AC_PROG_INSTALL
  88 ACX_PROG_LN
  89 AC_PROG_LN_S
  90 AC_PROG_SED
  91 AC_PROG_AWK
  92
  93 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  94
  95 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  96 # a relative path.
  97 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  98   INSTALL="${srcpwd}/install-sh -c"
  99 fi
 100
 101 # Set srcdir to "." if that's what it is.
 102 # This is important for multilib support.
 103 pwd=`${PWDCMD-pwd}`
 104 if test "${pwd}" = "${srcpwd}" ; then
 105   srcdir=.
 106 fi
 107
 108 topsrcdir=$srcpwd
 109
 110 extra_host_args=
 111
 112 ### To add a new directory to the tree, first choose whether it is a target
 113 ### or a host dependent tool.  Then put it into the appropriate list
 114 ### (library or tools, host or target), doing a dependency sort.
 115
 116 # Subdirs will be configured in the order listed in build_configdirs,
 117 # configdirs, or target_configdirs; see the serialization section below.
 118
 119 # Dependency sorting is only needed when *configuration* must be done in
 120 # a particular order.  In all cases a dependency should be specified in
 121 # the Makefile, whether or not it's implicitly specified here.
 122
 123 # Double entries in build_configdirs, configdirs, or target_configdirs may
 124 # cause circular dependencies and break everything horribly.
 125
 126 # these library is used by various programs built for the build
 127 # environment
 128 #
 129 build_libs="build-libiberty build-libcpp"
 130
 131 # these tools are built for the build environment
 132 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 133
 134 # these libraries are used by various programs built for the host environment
 135 #f
 136 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libcody libdecnumber gmp mpfr mpc isl libelf libiconv libctf"
 137
 138 # these tools are built for the host environment
 139 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 140 # know that we are building the simulator.
 141 # binutils, gas and ld appear in that order because it makes sense to run
 142 # "make check" in that particular order.
 143 # If --enable-gold is used, "gold" may replace "ld".
 144 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 c++tools"
 145
 146 # these libraries are built for the target environment, and are built after
 147 # the host libraries and the host tools (which may be a cross compiler)
 148 # Note that libiberty is not a target library.
 149 target_libraries="target-libgcc \
 150                 target-libbacktrace \
 151                 target-libgloss \
 152                 target-newlib \
 153                 target-libgomp \
 154                 target-liboffloadmic \
 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                 target-libphobos \
 168                 target-zlib"
 169
 170 # these tools are built using the target libraries, and are intended to
 171 # run only in the target environment
 172 #
 173 # note: any program that *uses* libraries that are in the "target_libraries"
 174 # list belongs in this list.
 175 #
 176 target_tools="target-rda"
 177
 178 ################################################################################
 179
 180 ## All tools belong in one of the four categories, and are assigned above
 181 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 182 ## is important because configure will choke if they ever get through.
 183 ## ${configdirs} is directories we build using the host tools.
 184 ## ${target_configdirs} is directories we build using the target tools.
 185 configdirs=`echo ${host_libs} ${host_tools}`
 186 target_configdirs=`echo ${target_libraries} ${target_tools}`
 187 build_configdirs=`echo ${build_libs} ${build_tools}`
 188
 189 m4_divert_text([PARSE_ARGS],
 190 [case $srcdir in
 191   *" "*)
 192 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 193     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 194 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 195     ;;
 196 esac
 197 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 198 ])
 199
 200 ################################################################################
 201
 202 srcname="gnu development package"
 203
 204 # This gets set non-empty for some net releases of packages.
 205 appdirs=""
 206
 207 # Define is_cross_compiler to save on calls to 'test'.
 208 is_cross_compiler=
 209 if test x"${host}" = x"${target}" ; then
 210   is_cross_compiler=no
 211 else
 212   is_cross_compiler=yes
 213 fi
 214
 215 # Find the build and target subdir names.
 216 GCC_TOPLEV_SUBDIRS
 217 # Be sure to cover against remnants of an in-tree build.
 218 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 219   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 220 Use a pristine source tree when building in a separate tree])
 221 fi
 222
 223 # Skipdirs are removed silently.
 224 skipdirs=
 225 # Noconfigdirs are removed loudly.
 226 noconfigdirs=""
 227
 228 use_gnu_ld=
 229 # Make sure we don't let GNU ld be added if we didn't want it.
 230 if test x$with_gnu_ld = xno ; then
 231   use_gnu_ld=no
 232   noconfigdirs="$noconfigdirs ld gold"
 233 fi
 234
 235 use_gnu_as=
 236 # Make sure we don't let GNU as be added if we didn't want it.
 237 if test x$with_gnu_as = xno ; then
 238   use_gnu_as=no
 239   noconfigdirs="$noconfigdirs gas"
 240 fi
 241
 242 use_included_zlib=
 243 AC_ARG_WITH(system-zlib,
 244 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 245 # Make sure we don't let ZLIB be added if we didn't want it.
 246 if test x$with_system_zlib = xyes ; then
 247   use_included_zlib=no
 248   noconfigdirs="$noconfigdirs zlib"
 249 fi
 250
 251 # some tools are so dependent upon X11 that if we're not building with X,
 252 # it's not even worth trying to configure, much less build, that tool.
 253
 254 case ${with_x} in
 255   yes | "") ;; # the default value for this tree is that X11 is available
 256   no)
 257     skipdirs="${skipdirs} tk itcl libgui"
 258     # We won't be able to build gdbtk without X.
 259     enable_gdbtk=no
 260     ;;
 261   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 262 esac
 263
 264 # Some are only suitable for cross toolchains.
 265 # Remove these if host=target.
 266 cross_only="target-libgloss target-newlib target-opcodes"
 267
 268 case $is_cross_compiler in
 269   no) skipdirs="${skipdirs} ${cross_only}" ;;
 270 esac
 271
 272 # If both --with-headers and --with-libs are specified, default to
 273 # --without-newlib.
 274 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 275    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 276   if test x"${with_newlib}" = x ; then
 277     with_newlib=no
 278   fi
 279 fi
 280
 281 # Recognize --with-newlib/--without-newlib.
 282 case ${with_newlib} in
 283   no) skipdirs="${skipdirs} target-newlib" ;;
 284   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 285 esac
 286
 287 AC_ARG_ENABLE(as-accelerator-for,
 288 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 289                 [build as offload target compiler.
 290                 Specify offload host triple by ARG])])
 291
 292 AC_ARG_ENABLE(offload-targets,
 293 [AS_HELP_STRING([--enable-offload-targets=LIST],
 294                 [enable offloading to devices from comma-separated LIST of
 295                 TARGET[=DIR]. Use optional path to find offload target compiler
 296                 during the build])],
 297 [
 298   if test x"$enable_offload_targets" = x; then
 299     AC_MSG_ERROR([no offload targets specified])
 300   fi
 301 ], [enable_offload_targets=])
 302
 303 AC_ARG_ENABLE(offload-defaulted,
 304 [AS_HELP_STRING([--enable-offload-defaulted]
 305                 [If enabled, configured but not installed offload compilers and
 306                 libgomp plugins are silently ignored.  Useful for distribution
 307                 compilers where those are in separate optional packages.])],
 308 [enable_offload_defaulted=$enableval],
 309 [enable_offload_defaulted=])
 310
 311 # Handle --enable-gold, --enable-ld.
 312 # --disable-gold [--enable-ld]
 313 #     Build only ld.  Default option.
 314 # --enable-gold [--enable-ld]
 315 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 316 #     as "ld.bfd" and "ld".
 317 # --enable-gold=default [--enable-ld]
 318 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 319 #     install ld as "ld.bfd".
 320 # --enable-gold[=default] --disable-ld
 321 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 322 # --enable-gold --enable-ld=default
 323 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 324 #     and ld.bfd).
 325 #     In other words, ld is default
 326 # --enable-gold=default --enable-ld=default
 327 #     Error.
 328
 329 default_ld=
 330 AC_ARG_ENABLE(gold,
 331 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 332                 [build gold @<:@ARG={default,yes,no}@:>@])],
 333 ENABLE_GOLD=$enableval,
 334 ENABLE_GOLD=no)
 335 case "${ENABLE_GOLD}" in
 336   yes|default)
 337     # Check for ELF target.
 338     is_elf=no
 339     case "${target}" in
 340       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 341       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 342       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 343       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 344         case "${target}" in
 345           *-*-linux*aout* | *-*-linux*oldld*)
 346             ;;
 347           *)
 348             is_elf=yes
 349             ;;
 350         esac
 351     esac
 352
 353     if test "$is_elf" = "yes"; then
 354       # Check for target supported by gold.
 355       case "${target}" in
 356         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 357         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-*)
 358           configdirs="$configdirs gold"
 359           if test x${ENABLE_GOLD} = xdefault; then
 360             default_ld=gold
 361           fi
 362           ENABLE_GOLD=yes
 363           ;;
 364       esac
 365     fi
 366     ;;
 367   no)
 368     ;;
 369   *)
 370     AC_MSG_ERROR([invalid --enable-gold argument])
 371     ;;
 372 esac
 373
 374 AC_ARG_ENABLE(ld,
 375 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 376                 [build ld @<:@ARG={default,yes,no}@:>@])],
 377 ENABLE_LD=$enableval,
 378 ENABLE_LD=yes)
 379
 380 case "${ENABLE_LD}" in
 381   default)
 382     if test x${default_ld} != x; then
 383       AC_MSG_ERROR([either gold or ld can be the default ld])
 384     fi
 385     ;;
 386   yes)
 387     ;;
 388   no)
 389     if test x${ENABLE_GOLD} != xyes; then
 390       AC_MSG_WARN([neither ld nor gold are enabled])
 391     fi
 392     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 393     ;;
 394   *)
 395     AC_MSG_ERROR([invalid --enable-ld argument])
 396     ;;
 397 esac
 398
 399 # PR gas/19109
 400 # Decide the default method for compressing debug sections.
 401 # Provide a configure time option to override our default.
 402 AC_ARG_ENABLE(compressed_debug_sections,
 403 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 404                 [Enable compressed debug sections for gas, gold or ld by
 405                  default])],
 406 [
 407   if test x"$enable_compressed_debug_sections" = xyes; then
 408     AC_MSG_ERROR([no program with compressed debug sections specified])
 409   fi
 410 ], [enable_compressed_debug_sections=])
 411
 412 # Configure extra directories which are host specific
 413
 414 case "${host}" in
 415   *-cygwin*)
 416     configdirs="$configdirs libtermcap" ;;
 417 esac
 418
 419 # A target can indicate whether a language isn't supported for some reason.
 420 # Only spaces may be used in this macro; not newlines or tabs.
 421 unsupported_languages=
 422
 423 # Remove more programs from consideration, based on the host or
 424 # target this usually means that a port of the program doesn't
 425 # exist yet.
 426
 427 case "${host}" in
 428   i[[3456789]]86-*-msdosdjgpp*)
 429     noconfigdirs="$noconfigdirs tcl tk itcl"
 430     ;;
 431 esac
 432
 433
 434 AC_ARG_ENABLE(libquadmath,
 435 AS_HELP_STRING([--disable-libquadmath],
 436   [do not build libquadmath directory]),
 437 ENABLE_LIBQUADMATH=$enableval,
 438 ENABLE_LIBQUADMATH=yes)
 439 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 440   noconfigdirs="$noconfigdirs target-libquadmath"
 441 fi
 442
 443
 444 AC_ARG_ENABLE(libquadmath-support,
 445 AS_HELP_STRING([--disable-libquadmath-support],
 446   [disable libquadmath support for Fortran]),
 447 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 448 ENABLE_LIBQUADMATH_SUPPORT=yes)
 449 enable_libquadmath_support=
 450 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 451   enable_libquadmath_support=no
 452 fi
 453
 454
 455 AC_ARG_ENABLE(libada,
 456 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 457 ENABLE_LIBADA=$enableval,
 458 ENABLE_LIBADA=yes)
 459 if test "${ENABLE_LIBADA}" != "yes" ; then
 460   noconfigdirs="$noconfigdirs gnattools"
 461 fi
 462
 463 AC_ARG_ENABLE(libssp,
 464 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 465 ENABLE_LIBSSP=$enableval,
 466 ENABLE_LIBSSP=yes)
 467
 468 AC_ARG_ENABLE(libstdcxx,
 469 AS_HELP_STRING([--disable-libstdcxx],
 470   [do not build libstdc++-v3 directory]),
 471 ENABLE_LIBSTDCXX=$enableval,
 472 ENABLE_LIBSTDCXX=default)
 473 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 474   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 475 fi]
 476
 477 # If this is accelerator compiler and its target is intelmic we enable
 478 # target liboffloadmic by default.  If this is compiler with offloading
 479 # for intelmic we enable host liboffloadmic by default.  Otherwise
 480 # liboffloadmic is disabled by default.
 481 AC_ARG_ENABLE([liboffloadmic],
 482 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 483                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 484 [case "$enableval" in
 485   no | host | target)
 486     enable_liboffloadmic=$enableval ;;
 487   *)
 488     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 489 esac],
 490 [if test x"$enable_as_accelerator_for" != x; then
 491   case "${target}" in
 492     *-intelmic-* | *-intelmicemul-*)
 493       enable_liboffloadmic=target
 494       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 495       ;;
 496     *)
 497       enable_liboffloadmic=no
 498       ;;
 499   esac
 500 else
 501   case "${enable_offload_targets}" in
 502     *-intelmic-* | *-intelmicemul-*)
 503       enable_liboffloadmic=host
 504       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 505       ;;
 506     *)
 507       enable_liboffloadmic=no
 508       ;;
 509     esac
 510 fi])
 511 AC_SUBST(extra_liboffloadmic_configure_flags)
 512
 513 # Enable libgomp by default on hosted POSIX systems, and a few others.
 514 if test x$enable_libgomp = x ; then
 515     case "${target}" in
 516     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 517         ;;
 518     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 519         ;;
 520     *-*-solaris2* | *-*-hpux11*)
 521         ;;
 522     *-*-darwin* | *-*-aix*)
 523         ;;
 524     nvptx*-*-* | amdgcn*-*-*)
 525         ;;
 526     *)
 527         noconfigdirs="$noconfigdirs target-libgomp"
 528         ;;
 529     esac
 530 fi
 531
 532 # Disable libatomic on unsupported systems.
 533 if test -d ${srcdir}/libatomic; then
 534     if test x$enable_libatomic = x; then
 535         AC_MSG_CHECKING([for libatomic support])
 536         if (srcdir=${srcdir}/libatomic; \
 537                 . ${srcdir}/configure.tgt; \
 538                 test -n "$UNSUPPORTED")
 539         then
 540             AC_MSG_RESULT([no])
 541             noconfigdirs="$noconfigdirs target-libatomic"
 542         else
 543             AC_MSG_RESULT([yes])
 544         fi
 545     fi
 546 fi
 547
 548 # Disable liboffloadmic on unsupported systems.
 549 if test -d ${srcdir}/liboffloadmic; then
 550     if test x$enable_liboffloadmic != xno; then
 551         AC_MSG_CHECKING([for liboffloadmic support])
 552         if (srcdir=${srcdir}/liboffloadmic; \
 553                 . ${srcdir}/configure.tgt; \
 554                 test -n "$UNSUPPORTED")
 555         then
 556             AC_MSG_RESULT([no])
 557             noconfigdirs="$noconfigdirs target-liboffloadmic"
 558         else
 559             AC_MSG_RESULT([yes])
 560         fi
 561     fi
 562 fi
 563
 564 # Disable libitm on unsupported systems.
 565 if test -d ${srcdir}/libitm; then
 566     if test x$enable_libitm = x; then
 567         AC_MSG_CHECKING([for libitm support])
 568         if (srcdir=${srcdir}/libitm; \
 569                 . ${srcdir}/configure.tgt; \
 570                 test -n "$UNSUPPORTED")
 571         then
 572             AC_MSG_RESULT([no])
 573             noconfigdirs="$noconfigdirs target-libitm"
 574         else
 575             AC_MSG_RESULT([yes])
 576         fi
 577     fi
 578 fi
 579
 580 # Disable libsanitizer on unsupported systems.
 581 if test -d ${srcdir}/libsanitizer; then
 582     if test x$enable_libsanitizer = x; then
 583         AC_MSG_CHECKING([for libsanitizer support])
 584         if (srcdir=${srcdir}/libsanitizer; \
 585                 . ${srcdir}/configure.tgt; \
 586                 test -n "$UNSUPPORTED")
 587         then
 588             AC_MSG_RESULT([no])
 589             noconfigdirs="$noconfigdirs target-libsanitizer"
 590         else
 591             AC_MSG_RESULT([yes])
 592         fi
 593     fi
 594 fi
 595
 596 # Disable libvtv on unsupported systems.
 597 if test -d ${srcdir}/libvtv; then
 598     if test x$enable_libvtv = x; then
 599         AC_MSG_CHECKING([for libvtv support])
 600         if (srcdir=${srcdir}/libvtv; \
 601                 . ${srcdir}/configure.tgt; \
 602                 test "$VTV_SUPPORTED" != "yes")
 603         then
 604             AC_MSG_RESULT([no])
 605             noconfigdirs="$noconfigdirs target-libvtv"
 606         else
 607             AC_MSG_RESULT([yes])
 608         fi
 609     fi
 610 fi
 611
 612 # Disable libquadmath for some systems.
 613 case "${target}" in
 614   avr-*-*)
 615     noconfigdirs="$noconfigdirs target-libquadmath"
 616     ;;
 617   # libquadmath is unused on AIX and libquadmath build process use of
 618   # LD_LIBRARY_PATH can break AIX bootstrap.
 619   powerpc-*-aix* | rs6000-*-aix*)
 620     noconfigdirs="$noconfigdirs target-libquadmath"
 621     ;;
 622 esac
 623
 624 # Disable libssp for some systems.
 625 case "${target}" in
 626   avr-*-*)
 627     # No hosted I/O support.
 628     noconfigdirs="$noconfigdirs target-libssp"
 629     ;;
 630   bpf-*-*)
 631     noconfigdirs="$noconfigdirs target-libssp"
 632     ;;
 633   powerpc-*-aix* | rs6000-*-aix*)
 634     noconfigdirs="$noconfigdirs target-libssp"
 635     ;;
 636   pru-*-*)
 637     # No hosted I/O support.
 638     noconfigdirs="$noconfigdirs target-libssp"
 639     ;;
 640   rl78-*-*)
 641     # libssp uses a misaligned load to trigger a fault, but the RL78
 642     # doesn't fault for those - instead, it gives a build-time error
 643     # for explicit misaligned loads.
 644     noconfigdirs="$noconfigdirs target-libssp"
 645     ;;
 646   visium-*-*)
 647     # No hosted I/O support.
 648     noconfigdirs="$noconfigdirs target-libssp"
 649     ;;
 650 esac
 651
 652 # Disable libstdc++-v3 for some systems.
 653 # Allow user to override this if they pass --enable-libstdc++-v3
 654 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 655   case "${target}" in
 656     *-*-vxworks*)
 657       # VxWorks uses the Dinkumware C++ library.
 658       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 659       ;;
 660     amdgcn*-*-*)
 661       # Not ported/fails to build when using newlib.
 662       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 663       ;;
 664     arm*-wince-pe*)
 665       # the C++ libraries don't build on top of CE's C libraries
 666       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 667       ;;
 668     avr-*-*)
 669       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 670       ;;
 671     bpf-*-*)
 672       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 673       ;;
 674     ft32-*-*)
 675       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 676       ;;
 677   esac
 678 fi
 679
 680 # Disable C++ on systems where it is known to not work.
 681 # For testing, you can override this with --enable-languages=c++.
 682 case ,${enable_languages}, in
 683   *,c++,*)
 684     ;;
 685   *)
 686       case "${target}" in
 687         bpf-*-*)
 688           unsupported_languages="$unsupported_languages c++"
 689           ;;
 690       esac
 691       ;;
 692 esac
 693
 694 # Disable Objc on systems where it is known to not work.
 695 # For testing, you can override this with --enable-languages=objc.
 696 case ,${enable_languages}, in
 697   *,objc,*)
 698     ;;
 699   *)
 700       case "${target}" in
 701         bpf-*-*)
 702           unsupported_languages="$unsupported_languages objc"
 703           ;;
 704       esac
 705       ;;
 706 esac
 707
 708 # Disable D on systems where it is known to not work.
 709 # For testing, you can override this with --enable-languages=d.
 710 case ,${enable_languages}, in
 711   *,d,*)
 712     ;;
 713   *)
 714     case "${target}" in
 715       bpf-*-*)
 716         unsupported_languages="$unsupported_languages d"
 717         ;;
 718     esac
 719     ;;
 720 esac
 721
 722 # Disable libphobos on unsupported systems.
 723 # For testing, you can override this with --enable-libphobos.
 724 if test -d ${srcdir}/libphobos; then
 725     if test x$enable_libphobos = x; then
 726         AC_MSG_CHECKING([for libphobos support])
 727         if (srcdir=${srcdir}/libphobos; \
 728                 . ${srcdir}/configure.tgt; \
 729                 test "$LIBPHOBOS_SUPPORTED" != "yes")
 730         then
 731             AC_MSG_RESULT([no])
 732             noconfigdirs="$noconfigdirs target-libphobos"
 733         else
 734             AC_MSG_RESULT([yes])
 735         fi
 736     fi
 737 fi
 738
 739 # Disable Fortran for some systems.
 740 case "${target}" in
 741   mmix-*-*)
 742     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 743     unsupported_languages="$unsupported_languages fortran"
 744     ;;
 745   bpf-*-*)
 746     unsupported_languages="$unsupported_languages fortran"
 747     ;;
 748 esac
 749
 750 # Disable libffi for some systems.
 751 case "${target}" in
 752   powerpc-*-darwin*)
 753     ;;
 754   i[[3456789]]86-*-darwin*)
 755     ;;
 756   x86_64-*-darwin[[912]]*)
 757     ;;
 758   *-*-darwin*)
 759     noconfigdirs="$noconfigdirs target-libffi"
 760     ;;
 761   *-*-netware*)
 762     noconfigdirs="$noconfigdirs target-libffi"
 763     ;;
 764   *-*-phoenix*)
 765     noconfigdirs="$noconfigdirs target-libffi"
 766     ;;
 767   *-*-rtems*)
 768     noconfigdirs="$noconfigdirs target-libffi"
 769     ;;
 770   *-*-tpf*)
 771     noconfigdirs="$noconfigdirs target-libffi"
 772     ;;
 773   *-*-uclinux*)
 774     noconfigdirs="$noconfigdirs target-libffi"
 775     ;;
 776   *-*-vxworks*)
 777     noconfigdirs="$noconfigdirs target-libffi"
 778     ;;
 779   aarch64*-*-freebsd*)
 780     noconfigdirs="$noconfigdirs target-libffi"
 781     ;;
 782   alpha*-*-*vms*)
 783     noconfigdirs="$noconfigdirs target-libffi"
 784     ;;
 785   arm*-*-freebsd*)
 786     noconfigdirs="$noconfigdirs target-libffi"
 787     ;;
 788   arm-wince-pe)
 789     noconfigdirs="$noconfigdirs target-libffi"
 790     ;;
 791   arm*-*-symbianelf*)
 792     noconfigdirs="$noconfigdirs target-libffi"
 793     ;;
 794   bpf-*-*)
 795     noconfigdirs="$noconfigdirs target-libffi"
 796     ;;
 797   cris-*-* | crisv32-*-*)
 798     case "${target}" in
 799       *-*-linux*)
 800         ;;
 801       *) # See PR46792 regarding target-libffi.
 802         noconfigdirs="$noconfigdirs target-libffi";;
 803     esac
 804     ;;
 805   hppa*64*-*-hpux*)
 806     noconfigdirs="$noconfigdirs target-libffi"
 807     ;;
 808   hppa*-hp-hpux11*)
 809     ;;
 810   hppa*-*-hpux*)
 811     noconfigdirs="$noconfigdirs target-libffi"
 812     ;;
 813   ia64*-*-*vms*)
 814     noconfigdirs="$noconfigdirs target-libffi"
 815     ;;
 816   i[[3456789]]86-w64-mingw*)
 817     noconfigdirs="$noconfigdirs target-libffi"
 818     ;;
 819   i[[3456789]]86-*-mingw*)
 820     noconfigdirs="$noconfigdirs target-libffi"
 821     ;;
 822   x86_64-*-mingw*)
 823     noconfigdirs="$noconfigdirs target-libffi"
 824     ;;
 825   mmix-*-*)
 826     noconfigdirs="$noconfigdirs target-libffi"
 827     ;;
 828   powerpc-*-aix*)
 829     ;;
 830   rs6000-*-aix*)
 831     ;;
 832   ft32-*-*)
 833     noconfigdirs="$noconfigdirs target-libffi"
 834     ;;
 835   *-*-lynxos*)
 836     noconfigdirs="$noconfigdirs target-libffi"
 837     ;;
 838 esac
 839
 840 # Disable the go frontend on systems where it is known to not work. Please keep
 841 # this in sync with contrib/config-list.mk.
 842 case "${target}" in
 843 *-*-darwin* | *-*-cygwin* | *-*-mingw* | bpf-* )
 844     unsupported_languages="$unsupported_languages go"
 845     ;;
 846 esac
 847
 848 # Only allow gdbserver on some systems.
 849 if test -d ${srcdir}/gdbserver; then
 850     if test x$enable_gdbserver = x; then
 851         AC_MSG_CHECKING([for gdbserver support])
 852         if (srcdir=${srcdir}/gdbserver; \
 853                 . ${srcdir}/configure.srv; \
 854                 test -n "$UNSUPPORTED")
 855         then
 856             AC_MSG_RESULT([no])
 857             noconfigdirs="$noconfigdirs gdbserver"
 858         else
 859             AC_MSG_RESULT([yes])
 860         fi
 861     fi
 862 fi
 863
 864 # Disable libgo for some systems where it is known to not work.
 865 # For testing, you can easily override this with --enable-libgo.
 866 if test x$enable_libgo = x; then
 867     case "${target}" in
 868     *-*-darwin*)
 869         # PR 46986
 870         noconfigdirs="$noconfigdirs target-libgo"
 871         ;;
 872     *-*-cygwin* | *-*-mingw*)
 873         noconfigdirs="$noconfigdirs target-libgo"
 874         ;;
 875     bpf-*-*)
 876         noconfigdirs="$noconfigdirs target-libgo"
 877         ;;
 878     esac
 879 fi
 880
 881 # Default libgloss CPU subdirectory.
 882 libgloss_dir="$target_cpu"
 883
 884 case "${target}" in
 885   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 886     libgloss_dir=wince
 887     ;;
 888   aarch64*-*-* )
 889     libgloss_dir=aarch64
 890     ;;
 891   arm*-*-*)
 892     libgloss_dir=arm
 893     ;;
 894   cris-*-* | crisv32-*-*)
 895     libgloss_dir=cris
 896     ;;
 897   hppa*-*-*)
 898     libgloss_dir=pa
 899     ;;
 900   i[[3456789]]86-*-*)
 901     libgloss_dir=i386
 902     ;;
 903   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 904     libgloss_dir=m68hc11
 905     ;;
 906   m68*-*-* | fido-*-*)
 907     libgloss_dir=m68k
 908     ;;
 909   mips*-*-*)
 910     libgloss_dir=mips
 911     ;;
 912   powerpc*-*-*)
 913     libgloss_dir=rs6000
 914     ;;
 915   pru-*-*)
 916     libgloss_dir=pru
 917     ;;
 918   sparc*-*-*)
 919     libgloss_dir=sparc
 920     ;;
 921 esac
 922
 923 # Disable newlib and libgloss for various target OSes.
 924 case "${target}" in
 925   alpha*-dec-osf*)
 926     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 927     ;;
 928   i[[3456789]]86-*-linux*)
 929     # This section makes it possible to build newlib natively on linux.
 930     # If we are using a cross compiler then don't configure newlib.
 931     if test x${is_cross_compiler} != xno ; then
 932       noconfigdirs="$noconfigdirs target-newlib"
 933     fi
 934     noconfigdirs="$noconfigdirs target-libgloss"
 935     # If we are not using a cross compiler, do configure newlib.
 936     # Note however, that newlib will only be configured in this situation
 937     # if the --with-newlib option has been given, because otherwise
 938     # 'target-newlib' will appear in skipdirs.
 939     ;;
 940   i[[3456789]]86-*-rdos*)
 941     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 942     ;;
 943   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 944     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 945     ;;
 946   sparc-*-sunos4*)
 947     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 948     ;;
 949   bpf-*-*)
 950     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 951     ;;
 952   *-*-aix*)
 953     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 954     ;;
 955   *-*-beos*)
 956     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 957     ;;
 958   *-*-chorusos)
 959     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 960     ;;
 961   *-*-dragonfly*)
 962     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 963     ;;
 964   *-*-freebsd*)
 965     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 966     ;;
 967   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 968     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 969     ;;
 970   *-*-lynxos*)
 971     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 972     ;;
 973   *-*-mingw*)
 974     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 975     ;;
 976   *-*-netbsd*)
 977     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 978     ;;
 979   *-*-netware*)
 980     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 981     ;;
 982   *-*-tpf*)
 983     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 984     ;;
 985   *-*-uclinux*)
 986     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 987     ;;
 988   *-*-vxworks*)
 989     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 990     ;;
 991 esac
 992
 993 case "${target}" in
 994   *-*-chorusos)
 995     ;;
 996   aarch64-*-darwin*)
 997     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 998     noconfigdirs="$noconfigdirs sim target-rda"
 999     ;;
1000   amdgcn*-*-*)
1001     ;;
1002   arm-*-darwin*)
1003     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1004     noconfigdirs="$noconfigdirs sim target-rda"
1005     ;;
1006   powerpc-*-darwin*)
1007     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1008     noconfigdirs="$noconfigdirs sim target-rda"
1009     ;;
1010   i[[3456789]]86-*-darwin*)
1011     noconfigdirs="$noconfigdirs ld gprof"
1012     noconfigdirs="$noconfigdirs sim target-rda"
1013     ;;
1014   x86_64-*-darwin[[912]]*)
1015     noconfigdirs="$noconfigdirs ld gas gprof"
1016     noconfigdirs="$noconfigdirs sim target-rda"
1017     ;;
1018   *-*-darwin*)
1019     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1020     noconfigdirs="$noconfigdirs sim target-rda"
1021     ;;
1022   *-*-dragonfly*)
1023     ;;
1024   *-*-freebsd*)
1025     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
1026         && ! test -d ${srcdir}/gmp \
1027         && test -f /usr/local/include/gmp.h; then
1028       with_gmp=/usr/local
1029     fi
1030     ;;
1031   *-*-kaos*)
1032     # Remove unsupported stuff on all kaOS configurations.
1033     noconfigdirs="$noconfigdirs target-libgloss"
1034     ;;
1035   *-*-netbsd*)
1036     ;;
1037   *-*-netware*)
1038     ;;
1039   *-*-phoenix*)
1040     noconfigdirs="$noconfigdirs target-libgloss"
1041     ;;
1042   *-*-rtems*)
1043     noconfigdirs="$noconfigdirs target-libgloss"
1044     ;;
1045     # The tpf target doesn't support gdb yet.
1046   *-*-tpf*)
1047     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
1048     ;;
1049   *-*-uclinux*)
1050     noconfigdirs="$noconfigdirs target-rda"
1051     ;;
1052   *-*-vxworks*)
1053     ;;
1054   alpha*-dec-osf*)
1055     # ld works, but does not support shared libraries.
1056     # gas doesn't generate exception information.
1057     noconfigdirs="$noconfigdirs gas ld"
1058     ;;
1059   alpha*-*-*vms*)
1060     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1061     ;;
1062   alpha*-*-*)
1063     # newlib is not 64 bit ready
1064     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1065     ;;
1066   bpf-*-*)
1067     noconfigdirs="$noconfigdirs target-libobjc target-libbacktrace"
1068     ;;
1069   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1070     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1071     ;;
1072   arc*-*-*)
1073     noconfigdirs="$noconfigdirs sim"
1074     ;;
1075   arm-*-pe*)
1076     noconfigdirs="$noconfigdirs target-libgloss"
1077     ;;
1078   arm-*-riscix*)
1079     noconfigdirs="$noconfigdirs ld target-libgloss"
1080     ;;
1081   avr-*-*)
1082     if test x${with_avrlibc} != xno; then
1083       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1084     fi
1085     ;;
1086   c4x-*-* | tic4x-*-*)
1087     noconfigdirs="$noconfigdirs target-libgloss"
1088     ;;
1089   tic54x-*-*)
1090     noconfigdirs="$noconfigdirs target-libgloss gdb"
1091     ;;
1092   d10v-*-*)
1093     noconfigdirs="$noconfigdirs target-libgloss"
1094     ;;
1095   d30v-*-*)
1096     noconfigdirs="$noconfigdirs gdb"
1097     ;;
1098   fr30-*-elf*)
1099     noconfigdirs="$noconfigdirs gdb"
1100     ;;
1101   ft32-*-*)
1102     noconfigdirs="$noconfigdirs target-rda gprof"
1103     ;;
1104   moxie-*-*)
1105     noconfigdirs="$noconfigdirs"
1106     ;;
1107   h8300*-*-*)
1108     noconfigdirs="$noconfigdirs target-libgloss"
1109     ;;
1110   h8500-*-*)
1111     noconfigdirs="$noconfigdirs target-libgloss"
1112     ;;
1113   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1114     ;;
1115   hppa*64*-*-hpux*)
1116     noconfigdirs="$noconfigdirs gdb"
1117     ;;
1118   hppa*-*-hpux11*)
1119     noconfigdirs="$noconfigdirs gdb ld"
1120     ;;
1121   hppa*64*-*-linux*)
1122     ;;
1123   hppa*-*-linux*)
1124     ;;
1125   hppa*-*-*elf* | \
1126   hppa*-*-lites* | \
1127   hppa*-*-openbsd* | \
1128   hppa*64*-*-*)
1129     ;;
1130   hppa*-*-pro*)
1131     ;;
1132   hppa*-*-*)
1133     noconfigdirs="$noconfigdirs ld"
1134     ;;
1135   i960-*-*)
1136     noconfigdirs="$noconfigdirs gdb"
1137     ;;
1138   ia64*-*-elf*)
1139     # No gdb support yet.
1140     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1141     ;;
1142   ia64*-**-hpux*)
1143     # No ld support yet.
1144     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1145     ;;
1146   ia64*-*-*vms*)
1147     # No ld support yet.
1148     noconfigdirs="$noconfigdirs libgui itcl ld"
1149     ;;
1150   i[[3456789]]86-w64-mingw*)
1151     ;;
1152   i[[3456789]]86-*-mingw*)
1153     target_configdirs="$target_configdirs target-winsup"
1154     ;;
1155   *-*-cygwin*)
1156     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1157     noconfigdirs="$noconfigdirs target-libgloss"
1158     # always build newlib if winsup directory is present.
1159     if test -d "$srcdir/winsup/cygwin"; then
1160       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1161     elif test -d "$srcdir/newlib"; then
1162       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1163     fi
1164     ;;
1165   i[[3456789]]86-*-pe)
1166     noconfigdirs="$noconfigdirs target-libgloss"
1167     ;;
1168   i[[3456789]]86-*-sco3.2v5*)
1169     # The linker does not yet know about weak symbols in COFF,
1170     # and is not configured to handle mixed ELF and COFF.
1171     noconfigdirs="$noconfigdirs ld target-libgloss"
1172     ;;
1173   i[[3456789]]86-*-sco*)
1174     noconfigdirs="$noconfigdirs gprof target-libgloss"
1175     ;;
1176   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1177     noconfigdirs="$noconfigdirs target-libgloss"
1178     ;;
1179   i[[3456789]]86-*-sysv4*)
1180     noconfigdirs="$noconfigdirs target-libgloss"
1181     ;;
1182   i[[3456789]]86-*-beos*)
1183     noconfigdirs="$noconfigdirs gdb"
1184     ;;
1185   i[[3456789]]86-*-rdos*)
1186     noconfigdirs="$noconfigdirs gdb"
1187     ;;
1188   mmix-*-*)
1189     noconfigdirs="$noconfigdirs gdb"
1190     ;;
1191   mt-*-*)
1192     noconfigdirs="$noconfigdirs sim"
1193     ;;
1194   nfp-*-*)
1195     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1196     noconfigdirs="$noconfigdirs $target_libraries"
1197     ;;
1198   pdp11-*-*)
1199     noconfigdirs="$noconfigdirs gdb gprof"
1200     ;;
1201   powerpc-*-aix*)
1202     # copied from rs6000-*-* entry
1203     noconfigdirs="$noconfigdirs gprof"
1204     ;;
1205   powerpc*-*-winnt* | powerpc*-*-pe*)
1206     target_configdirs="$target_configdirs target-winsup"
1207     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1208     # always build newlib.
1209     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1210     ;;
1211     # This is temporary until we can link against shared libraries
1212   powerpcle-*-solaris*)
1213     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1214     ;;
1215   powerpc-*-beos*)
1216     noconfigdirs="$noconfigdirs gdb"
1217     ;;
1218   rs6000-*-lynxos*)
1219     noconfigdirs="$noconfigdirs gprof"
1220     ;;
1221   rs6000-*-aix*)
1222     noconfigdirs="$noconfigdirs gprof"
1223     ;;
1224   rs6000-*-*)
1225     noconfigdirs="$noconfigdirs gprof"
1226     ;;
1227   m68k-apollo-*)
1228     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1229     ;;
1230   microblaze*)
1231     noconfigdirs="$noconfigdirs gprof"
1232     ;;
1233   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1234     if test x$with_newlib = xyes; then
1235       noconfigdirs="$noconfigdirs gprof"
1236     fi
1237     ;;
1238   mips*-*-irix5*)
1239     noconfigdirs="$noconfigdirs gprof target-libgloss"
1240     ;;
1241   mips*-*-irix6*)
1242     noconfigdirs="$noconfigdirs gprof target-libgloss"
1243     ;;
1244   mips*-*-bsd*)
1245     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1246     ;;
1247   mips*-*-linux*)
1248     ;;
1249   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1250   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1251     noconfigdirs="$noconfigdirs ld gas gprof"
1252     ;;
1253   mips*-*-*)
1254     noconfigdirs="$noconfigdirs gprof"
1255     ;;
1256   nvptx*-*-*)
1257     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1258     ;;
1259   sh-*-*)
1260     case "${target}" in
1261       sh*-*-elf)
1262          ;;
1263       *)
1264          noconfigdirs="$noconfigdirs target-libgloss" ;;
1265     esac
1266     ;;
1267   sparc-*-sunos4*)
1268     if test x${is_cross_compiler} = xno ; then
1269            use_gnu_ld=no
1270     fi
1271     ;;
1272   tic6x-*-*)
1273     noconfigdirs="$noconfigdirs sim"
1274     ;;
1275   tilepro*-*-* | tilegx*-*-*)
1276     noconfigdirs="$noconfigdirs sim"
1277     ;;
1278   v810-*-*)
1279     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1280     ;;
1281   vax-*-*)
1282     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1283     ;;
1284   wasm32-*-*)
1285     noconfigdirs="$noconfigdirs ld"
1286     ;;
1287 esac
1288
1289 # If we aren't building newlib, then don't build libgloss, since libgloss
1290 # depends upon some newlib header files.
1291 case "${noconfigdirs}" in
1292   *target-libgloss*) ;;
1293   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1294 esac
1295
1296 # Work in distributions that contain no compiler tools, like Autoconf.
1297 host_makefile_frag=/dev/null
1298 if test -d ${srcdir}/config ; then
1299 case "${host}" in
1300   i[[3456789]]86-*-msdosdjgpp*)
1301     host_makefile_frag="config/mh-djgpp"
1302     ;;
1303   *-cygwin*)
1304     ACX_CHECK_CYGWIN_CAT_WORKS
1305     host_makefile_frag="config/mh-cygwin"
1306     ;;
1307   *-mingw*)
1308     host_makefile_frag="config/mh-mingw"
1309     ;;
1310   alpha*-linux*)
1311     host_makefile_frag="config/mh-alpha-linux"
1312     ;;
1313   hppa*-hp-hpux10*)
1314     host_makefile_frag="config/mh-pa-hpux10"
1315     ;;
1316   hppa*-hp-hpux*)
1317     host_makefile_frag="config/mh-pa"
1318     ;;
1319   hppa*-*)
1320     host_makefile_frag="config/mh-pa"
1321     ;;
1322   i?86-*-darwin[[89]]* | i?86-*-darwin1[[0-7]]* | powerpc*-*-darwin*)
1323     host_makefile_frag="config/mh-darwin"
1324     ;;
1325   powerpc-*-aix*)
1326     host_makefile_frag="config/mh-ppc-aix"
1327     ;;
1328   rs6000-*-aix*)
1329     host_makefile_frag="config/mh-ppc-aix"
1330     ;;
1331 esac
1332 fi
1333
1334 if test "${build}" != "${host}" ; then
1335   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1336   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1337   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1338   CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CC_FOR_BUILD) -E}"
1339   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1340   DSYMUTIL_FOR_BUILD=${DSYMUTIL_FOR_BUILD-dsymutil}
1341   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1342   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1343   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1344   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1345   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1346   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1347   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1348   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1349   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1350 else
1351   AR_FOR_BUILD="\$(AR)"
1352   AS_FOR_BUILD="\$(AS)"
1353   CC_FOR_BUILD="\$(CC)"
1354   CXX_FOR_BUILD="\$(CXX)"
1355   DSYMUTIL_FOR_BUILD="\$(DSYMUTIL)"
1356   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1357   GOC_FOR_BUILD="\$(GOC)"
1358   GDC_FOR_BUILD="\$(GDC)"
1359   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1360   LD_FOR_BUILD="\$(LD)"
1361   NM_FOR_BUILD="\$(NM)"
1362   RANLIB_FOR_BUILD="\$(RANLIB)"
1363   WINDRES_FOR_BUILD="\$(WINDRES)"
1364   WINDMC_FOR_BUILD="\$(WINDMC)"
1365 fi
1366
1367 AC_PROG_CC_C99
1368 AC_PROG_CXX
1369
1370 # We must set the default linker to the linker used by gcc for the correct
1371 # operation of libtool.  If LD is not defined and we are using gcc, try to
1372 # set the LD default to the ld used by gcc.
1373 if test -z "$LD"; then
1374   if test "$GCC" = yes; then
1375     case $build in
1376     *-*-mingw*)
1377       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1378     *)
1379       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1380     esac
1381     case $gcc_prog_ld in
1382     # Accept absolute paths.
1383     [[\\/]* | [A-Za-z]:[\\/]*)]
1384       LD="$gcc_prog_ld" ;;
1385     esac
1386   fi
1387 fi
1388
1389 # Check whether -static-libstdc++ -static-libgcc is supported.
1390 have_static_libs=no
1391 if test "$GCC" = yes; then
1392   saved_LDFLAGS="$LDFLAGS"
1393
1394   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1395   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1396   AC_LANG_PUSH(C++)
1397   AC_LINK_IFELSE([AC_LANG_SOURCE([
1398 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1399 #error -static-libstdc++ not implemented
1400 #endif
1401 int main() {}])],
1402     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1403     [AC_MSG_RESULT([no])])
1404   AC_LANG_POP(C++)
1405
1406   LDFLAGS="$saved_LDFLAGS"
1407 fi
1408
1409 ACX_PROG_GNAT
1410 ACX_PROG_GDC
1411 ACX_PROG_CMP_IGNORE_INITIAL
1412
1413 AC_ARG_ENABLE([bootstrap],
1414 [AS_HELP_STRING([--enable-bootstrap],
1415                 [enable bootstrapping @<:@yes if native build@:>@])],,
1416 enable_bootstrap=default)
1417
1418 # Issue errors and warnings for invalid/strange bootstrap combinations.
1419 if test -r $srcdir/gcc/configure; then
1420   have_compiler=yes
1421 else
1422   have_compiler=no
1423 fi
1424
1425 case "$have_compiler:$host:$target:$enable_bootstrap" in
1426   *:*:*:no) ;;
1427
1428   # Default behavior.  Enable bootstrap if we have a compiler
1429   # and we are in a native configuration.
1430   yes:$build:$build:default)
1431     enable_bootstrap=yes ;;
1432
1433   *:*:*:default)
1434     enable_bootstrap=no ;;
1435
1436   # We have a compiler and we are in a native configuration, bootstrap is ok
1437   yes:$build:$build:yes)
1438     ;;
1439
1440   # Other configurations, but we have a compiler.  Assume the user knows
1441   # what he's doing.
1442   yes:*:*:yes)
1443     AC_MSG_WARN([trying to bootstrap a cross compiler])
1444     ;;
1445
1446   # No compiler: if they passed --enable-bootstrap explicitly, fail
1447   no:*:*:yes)
1448     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1449
1450   # Fail if wrong command line
1451   *)
1452     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1453     ;;
1454 esac
1455
1456 # When bootstrapping with GCC, build stage 1 in C++11 mode to ensure that a
1457 # C++11 compiler can still start the bootstrap.  Otherwise, if building GCC,
1458 # require C++11 (or higher).
1459 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1460   CXX="$CXX -std=c++11"
1461 elif test "$have_compiler" = yes; then
1462   AX_CXX_COMPILE_STDCXX(11)
1463
1464   if test "${build}" != "${host}"; then
1465     AX_CXX_COMPILE_STDCXX(11, [], [], [_FOR_BUILD])
1466   fi
1467 fi
1468
1469 # Used for setting $lt_cv_objdir
1470 _LT_CHECK_OBJDIR
1471
1472 # Check for GMP, MPFR and MPC
1473 gmplibs="-lmpc -lmpfr -lgmp"
1474 gmpinc=
1475 have_gmp=no
1476
1477 # Specify a location for mpc
1478 # check for this first so it ends up on the link line before mpfr.
1479 AC_ARG_WITH(mpc,
1480 [AS_HELP_STRING([--with-mpc=PATH],
1481                 [specify prefix directory for installed MPC package.
1482                  Equivalent to --with-mpc-include=PATH/include
1483                  plus --with-mpc-lib=PATH/lib])])
1484 AC_ARG_WITH(mpc-include,
1485 [AS_HELP_STRING([--with-mpc-include=PATH],
1486                 [specify directory for installed MPC include files])])
1487 AC_ARG_WITH(mpc-lib,
1488 [AS_HELP_STRING([--with-mpc-lib=PATH],
1489                 [specify directory for the installed MPC library])])
1490
1491 if test "x$with_mpc" != x; then
1492   gmplibs="-L$with_mpc/lib $gmplibs"
1493   gmpinc="-I$with_mpc/include $gmpinc"
1494 fi
1495 if test "x$with_mpc_include" != x; then
1496   gmpinc="-I$with_mpc_include $gmpinc"
1497 fi
1498 if test "x$with_mpc_lib" != x; then
1499   gmplibs="-L$with_mpc_lib $gmplibs"
1500 fi
1501 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1502   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1503   gmpinc='-I$$s/mpc/src '"$gmpinc"
1504   # Do not test the mpc version.  Assume that it is sufficient, since
1505   # it is in the source tree, and the library has not been built yet
1506   # but it would be included on the link line in the version check below
1507   # hence making the test fail.
1508   have_gmp=yes
1509 fi
1510
1511 # Specify a location for mpfr
1512 # check for this first so it ends up on the link line before gmp.
1513 AC_ARG_WITH(mpfr-dir,
1514 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1515 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1516 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1517
1518 AC_ARG_WITH(mpfr,
1519 [AS_HELP_STRING([--with-mpfr=PATH],
1520                 [specify prefix directory for installed MPFR package.
1521                  Equivalent to --with-mpfr-include=PATH/include
1522                  plus --with-mpfr-lib=PATH/lib])])
1523 AC_ARG_WITH(mpfr-include,
1524 [AS_HELP_STRING([--with-mpfr-include=PATH],
1525                 [specify directory for installed MPFR include files])])
1526 AC_ARG_WITH(mpfr-lib,
1527 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1528                 [specify directory for the installed MPFR library])])
1529
1530 if test "x$with_mpfr" != x; then
1531   gmplibs="-L$with_mpfr/lib $gmplibs"
1532   gmpinc="-I$with_mpfr/include $gmpinc"
1533 fi
1534 if test "x$with_mpfr_include" != x; then
1535   gmpinc="-I$with_mpfr_include $gmpinc"
1536 fi
1537 if test "x$with_mpfr_lib" != x; then
1538   gmplibs="-L$with_mpfr_lib $gmplibs"
1539 fi
1540 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1541   # MPFR v3.1.0 moved the sources into a src sub-directory.
1542   if ! test -d ${srcdir}/mpfr/src; then
1543     AC_MSG_ERROR([dnl
1544 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1545   fi
1546   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1547   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1548   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1549   # Do not test the mpfr version.  Assume that it is sufficient, since
1550   # it is in the source tree, and the library has not been built yet
1551   # but it would be included on the link line in the version check below
1552   # hence making the test fail.
1553   have_gmp=yes
1554 fi
1555
1556 # Specify a location for gmp
1557 AC_ARG_WITH(gmp-dir,
1558 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1559 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1560 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1561
1562 AC_ARG_WITH(gmp,
1563 [AS_HELP_STRING([--with-gmp=PATH],
1564                 [specify prefix directory for the installed GMP package.
1565                  Equivalent to --with-gmp-include=PATH/include
1566                  plus --with-gmp-lib=PATH/lib])])
1567 AC_ARG_WITH(gmp-include,
1568 [AS_HELP_STRING([--with-gmp-include=PATH],
1569                 [specify directory for installed GMP include files])])
1570 AC_ARG_WITH(gmp-lib,
1571 [AS_HELP_STRING([--with-gmp-lib=PATH],
1572                 [specify directory for the installed GMP library])])
1573
1574
1575 if test "x$with_gmp" != x; then
1576   gmplibs="-L$with_gmp/lib $gmplibs"
1577   gmpinc="-I$with_gmp/include $gmpinc"
1578 fi
1579 if test "x$with_gmp_include" != x; then
1580   gmpinc="-I$with_gmp_include $gmpinc"
1581 fi
1582 if test "x$with_gmp_lib" != x; then
1583   gmplibs="-L$with_gmp_lib $gmplibs"
1584 fi
1585 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1586   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1587   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1588   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1589   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1590   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1591   # Do not test the gmp version.  Assume that it is sufficient, since
1592   # it is in the source tree, and the library has not been built yet
1593   # but it would be included on the link line in the version check below
1594   # hence making the test fail.
1595   have_gmp=yes
1596 fi
1597
1598 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1599   have_gmp=yes
1600   saved_CFLAGS="$CFLAGS"
1601   CFLAGS="$CFLAGS $gmpinc"
1602   # Check for the recommended and required versions of GMP.
1603   AC_MSG_CHECKING([for the correct version of gmp.h])
1604   AC_TRY_COMPILE([#include "gmp.h"],[
1605   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1606   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1607   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1608   choke me
1609   #endif
1610   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1611   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1612   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1613   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1614   choke me
1615   #endif
1616   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1617    [AC_MSG_RESULT([no]); have_gmp=no])
1618
1619   # If we have GMP, check the MPFR version.
1620   if test x"$have_gmp" = xyes; then
1621     # Check for the recommended and required versions of MPFR.
1622     AC_MSG_CHECKING([for the correct version of mpfr.h])
1623     AC_TRY_COMPILE([#include <gmp.h>
1624     #include <mpfr.h>],[
1625     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,0)
1626     choke me
1627     #endif
1628     ], [AC_TRY_COMPILE([#include <gmp.h>
1629     #include <mpfr.h>],[
1630     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,6)
1631     choke me
1632     #endif
1633     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1634      [AC_MSG_RESULT([no]); have_gmp=no])
1635   fi
1636
1637   # Check for the MPC header version.
1638   if test x"$have_gmp" = xyes ; then
1639     # Check for the recommended and required versions of MPC.
1640     AC_MSG_CHECKING([for the correct version of mpc.h])
1641     AC_TRY_COMPILE([#include <mpc.h>],[
1642     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1643     choke me
1644     #endif
1645     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1646     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1647     choke me
1648     #endif
1649     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1650      [AC_MSG_RESULT([no]); have_gmp=no])
1651   fi
1652
1653   # Now check the MPFR library.
1654   if test x"$have_gmp" = xyes; then
1655     saved_LIBS="$LIBS"
1656     LIBS="$LIBS $gmplibs"
1657     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1658     AC_TRY_LINK([#include <mpc.h>],[
1659     mpfr_t n;
1660     mpfr_t x;
1661     mpc_t c;
1662     int t;
1663     mpfr_init (n);
1664     mpfr_init (x);
1665     mpfr_atan2 (n, n, x, MPFR_RNDN);
1666     mpfr_erfc (n, x, MPFR_RNDN);
1667     mpfr_subnormalize (x, t, MPFR_RNDN);
1668     mpfr_clear(n);
1669     mpfr_clear(x);
1670     mpc_init2 (c, 53);
1671     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1672     mpc_cosh (c, c, MPC_RNDNN);
1673     mpc_pow (c, c, c, MPC_RNDNN);
1674     mpc_acosh (c, c, MPC_RNDNN);
1675     mpc_clear (c);
1676     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1677     LIBS="$saved_LIBS"
1678   fi
1679
1680   CFLAGS="$saved_CFLAGS"
1681
1682 # The library versions listed in the error message below should match
1683 # the HARD-minimums enforced above.
1684   if test x$have_gmp != xyes; then
1685     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 3.1.0+ and MPC 0.8.0+.
1686 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1687 their locations.  Source code for these libraries can be found at
1688 their respective hosting sites as well as at
1689 https://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1690 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1691 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1692 make sure that you have installed both the libraries and the header
1693 files.  They may be located in separate packages.])
1694   fi
1695 fi
1696
1697 # Flags needed for both GMP, MPFR and/or MPC.
1698 AC_SUBST(gmplibs)
1699 AC_SUBST(gmpinc)
1700 AC_SUBST(extra_mpfr_configure_flags)
1701 AC_SUBST(extra_mpc_gmp_configure_flags)
1702 AC_SUBST(extra_mpc_mpfr_configure_flags)
1703 AC_SUBST(extra_isl_gmp_configure_flags)
1704
1705 # Libraries to use for stage1 or when not bootstrapping.
1706 AC_ARG_WITH(stage1-libs,
1707 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1708 [if test "$withval" = "no" -o "$withval" = "yes"; then
1709    stage1_libs=
1710  else
1711    stage1_libs=$withval
1712  fi],
1713 [stage1_libs=])
1714 AC_SUBST(stage1_libs)
1715
1716 # Whether or not to use -static-libstdc++ and -static-libgcc.  The
1717 # default is yes if gcc is being built; no otherwise.  The reason for
1718 # this default is that gdb is sometimes linked against GNU Source
1719 # Highlight, which is a shared library that uses C++ exceptions.  In
1720 # this case, -static-libstdc++ will cause crashes.
1721 AC_ARG_WITH(static-standard-libraries,
1722 [AS_HELP_STRING([--with-static-standard-libraries],
1723                 [use -static-libstdc++ and -static-libgcc (default=auto)])],
1724 [], [with_static_standard_libraries=auto])
1725 if test "$with_static_standard_libraries" = auto; then
1726   with_static_standard_libraries=$have_compiler
1727 fi
1728
1729 # Linker flags to use for stage1 or when not bootstrapping.
1730 AC_ARG_WITH(stage1-ldflags,
1731 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1732 [if test "$withval" = "no" -o "$withval" = "yes"; then
1733    stage1_ldflags=
1734  else
1735    stage1_ldflags=$withval
1736  fi],
1737 [stage1_ldflags=
1738  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1739  # if supported.  But if the user explicitly specified the libraries to use,
1740  # trust that they are doing what they want.
1741  if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
1742      -a "$have_static_libs" = yes; then
1743    stage1_ldflags="-static-libstdc++ -static-libgcc"
1744  fi])
1745 AC_SUBST(stage1_ldflags)
1746
1747 # Libraries to use for stage2 and later builds.
1748 AC_ARG_WITH(boot-libs,
1749 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1750 [if test "$withval" = "no" -o "$withval" = "yes"; then
1751    poststage1_libs=
1752  else
1753    poststage1_libs=$withval
1754  fi],
1755 [poststage1_libs=])
1756 AC_SUBST(poststage1_libs)
1757
1758 # Linker flags to use for stage2 and later builds.
1759 AC_ARG_WITH(boot-ldflags,
1760 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1761                 [linker flags for stage2 and later])],
1762 [if test "$withval" = "no" -o "$withval" = "yes"; then
1763    poststage1_ldflags=
1764  else
1765    poststage1_ldflags=$withval
1766  fi],
1767 [poststage1_ldflags=
1768  # In stages 2 and 3, default to linking libstdc++ and libgcc
1769  # statically.  But if the user explicitly specified the libraries to
1770  # use, trust that they are doing what they want.
1771  if test "$poststage1_libs" = ""; then
1772    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1773  fi])
1774 AC_SUBST(poststage1_ldflags)
1775
1776 # GCC GRAPHITE dependency isl.
1777 # Basic setup is inlined here, actual checks are in config/isl.m4
1778
1779 AC_ARG_WITH(isl,
1780   [AS_HELP_STRING(
1781    [--with-isl=PATH],
1782    [Specify prefix directory for the installed isl package.
1783     Equivalent to --with-isl-include=PATH/include
1784     plus --with-isl-lib=PATH/lib])])
1785
1786 # Treat --without-isl as a request to disable
1787 # GRAPHITE support and skip all following checks.
1788 if test "x$with_isl" != "xno"; then
1789   # Check for isl
1790   dnl Provide configure switches and initialize islinc & isllibs
1791   dnl with user input.
1792   ISL_INIT_FLAGS
1793   dnl The versions of isl that work for Graphite
1794   ISL_CHECK_VERSION()
1795   dnl Only execute fail-action, if isl has been requested.
1796   ISL_IF_FAILED([
1797     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1798 fi
1799
1800 # If the isl check failed, disable builds of in-tree variant of isl
1801 if test "x$with_isl" = xno ||
1802    test "x$gcc_cv_isl" = xno; then
1803   noconfigdirs="$noconfigdirs isl"
1804   islinc=
1805 fi
1806
1807 AC_SUBST(isllibs)
1808 AC_SUBST(islinc)
1809
1810 # Check for LTO support.
1811 AC_ARG_ENABLE(lto,
1812 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1813 enable_lto=$enableval,
1814 enable_lto=yes; default_enable_lto=yes)
1815
1816 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1817   build_lto_plugin=yes
1818 ],[if test x"$default_enable_lto" = x"yes" ; then
1819     case $target in
1820       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1821       # On other non-ELF platforms, LTO has yet to be validated.
1822       *) enable_lto=no ;;
1823     esac
1824   else
1825   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1826   # It would also be nice to check the binutils support, but we don't
1827   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1828   # warn during gcc/ subconfigure; unless you're bootstrapping with
1829   # -flto it won't be needed until after installation anyway.
1830     case $target in
1831       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1832       *) if test x"$enable_lto" = x"yes"; then
1833         AC_MSG_ERROR([LTO support is not enabled for this target.])
1834         fi
1835       ;;
1836     esac
1837   fi
1838   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1839   # Build it unless LTO was explicitly disabled.
1840   case $target in
1841     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1842     *) ;;
1843   esac
1844 ])
1845
1846 AC_ARG_ENABLE(linker-plugin-configure-flags,
1847   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1848     [additional flags for configuring linker plugins @<:@none@:>@])],
1849   extra_linker_plugin_configure_flags=$enableval,
1850   extra_linker_plugin_configure_flags=)
1851 AC_SUBST(extra_linker_plugin_configure_flags)
1852 AC_ARG_ENABLE(linker-plugin-flags,
1853   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1854     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1855   extra_linker_plugin_flags=$enableval,
1856   extra_linker_plugin_flags=)
1857 AC_SUBST(extra_linker_plugin_flags)
1858
1859 # Enable --enable-host-shared.
1860 # Checked early to determine whether jit is an 'all' language
1861 AC_ARG_ENABLE(host-shared,
1862 [AS_HELP_STRING([--enable-host-shared],
1863                 [build host code as shared libraries])],
1864 [host_shared=$enableval
1865  case $target in
1866    x86_64-*-darwin* | aarch64-*-darwin*)
1867      if test x$host_shared != xyes ; then
1868        # PIC is the default, and actually cannot be switched off.
1869        echo configure.ac: warning: PIC code is required for the configured target, host-shared setting ignored. 1>&2
1870        host_shared=yes
1871      fi ;;
1872   *) ;;
1873  esac],
1874 [case $target in
1875   x86_64-*-darwin* | aarch64-*-darwin*) host_shared=yes ;;
1876   *) host_shared=no ;;
1877  esac])
1878 AC_SUBST(host_shared)
1879
1880 # By default, C and C++ are the only stage 1 languages.
1881 stage1_languages=,c,
1882
1883 # Target libraries that we bootstrap.
1884 bootstrap_target_libs=,target-libgcc,
1885
1886 # Figure out what language subdirectories are present.
1887 # Look if the user specified --enable-languages="..."; if not, use
1888 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1889 # go away some day.
1890 # NB:  embedded tabs in this IF block -- do not untabify
1891 if test -d ${srcdir}/gcc; then
1892   if test x"${enable_languages+set}" != xset; then
1893     if test x"${LANGUAGES+set}" = xset; then
1894       enable_languages="${LANGUAGES}"
1895         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1896     else
1897       enable_languages=default
1898     fi
1899   else
1900     if test x"${enable_languages}" = x ||
1901        test x"${enable_languages}" = xyes;
1902        then
1903       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1904       exit 1
1905     fi
1906   fi
1907   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1908
1909   # 'f95' is the old name for the 'fortran' language. We issue a warning
1910   # and make the substitution.
1911   case ,${enable_languages}, in
1912     *,f95,*)
1913       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1914       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1915       ;;
1916   esac
1917
1918   # If bootstrapping, C++ must be enabled.
1919   case ",$enable_languages,:$enable_bootstrap" in
1920     *,c++,*:*) ;;
1921     *:yes)
1922       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1923         enable_languages="${enable_languages},c++"
1924       else
1925         AC_MSG_ERROR([bootstrapping requires c++ sources])
1926       fi
1927       ;;
1928   esac
1929
1930   # First scan to see if an enabled language requires some other language.
1931   # We assume that a given config-lang.in will list all the language
1932   # front ends it requires, even if some are required indirectly.
1933   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1934     case ${lang_frag} in
1935       ..) ;;
1936       # The odd quoting in the next line works around
1937       # an apparent bug in bash 1.12 on linux.
1938       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1939       *)
1940         # From the config-lang.in, get $language, $lang_requires, and
1941         # $lang_requires_boot_languages.
1942         language=
1943         lang_requires=
1944         lang_requires_boot_languages=
1945         # set srcdir during sourcing lang_frag to the gcc dir.
1946         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
1947         # polutes this shell
1948         saved_srcdir=${srcdir}
1949         srcdir=${srcdir}/gcc . ${lang_frag}
1950         srcdir=${saved_srcdir}
1951         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1952           case ,${enable_languages}, in
1953             *,$other,*) ;;
1954             *,default,*) ;;
1955             *,all,*) ;;
1956             *,$language,*)
1957               echo " \`$other' language required by \`$language'; enabling" 1>&2
1958               enable_languages="${enable_languages},${other}"
1959               ;;
1960           esac
1961         done
1962         for other in ${lang_requires_boot_languages} ; do
1963           if test "$other" != "c"; then
1964             case ,${enable_stage1_languages}, in
1965               *,$other,*) ;;
1966               *,default,*) ;;
1967               *,all,*) ;;
1968               *)
1969                 case ,${enable_languages}, in
1970                   *,$language,*)
1971                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1972                     enable_stage1_languages="$enable_stage1_languages,${other}"
1973                     ;;
1974                 esac
1975                 ;;
1976             esac
1977           fi
1978         done
1979         ;;
1980     esac
1981   done
1982
1983   new_enable_languages=,c,
1984
1985   # If LTO is enabled, add the LTO front end.
1986   if test "$enable_lto" = "yes" ; then
1987     case ,${enable_languages}, in
1988       *,lto,*) ;;
1989       *) enable_languages="${enable_languages},lto" ;;
1990     esac
1991     if test "${build_lto_plugin}" = "yes" ; then
1992       configdirs="$configdirs lto-plugin"
1993     fi
1994   fi
1995
1996   # If we're building an offloading compiler, add the LTO front end.
1997   if test x"$enable_as_accelerator_for" != x ; then
1998     case ,${enable_languages}, in
1999       *,lto,*) ;;
2000       *) enable_languages="${enable_languages},lto" ;;
2001     esac
2002   fi
2003
2004   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
2005   potential_languages=,c,
2006
2007   enabled_target_libs=
2008   disabled_target_libs=
2009
2010   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2011     case ${lang_frag} in
2012       ..) ;;
2013       # The odd quoting in the next line works around
2014       # an apparent bug in bash 1.12 on linux.
2015       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2016       *)
2017         # From the config-lang.in, get $language, $target_libs,
2018         # $lang_dirs, $boot_language, and $build_by_default
2019         language=
2020         target_libs=
2021         lang_dirs=
2022         subdir_requires=
2023         boot_language=no
2024         build_by_default=yes
2025         # set srcdir during sourcing.  See above about save & restore
2026         saved_srcdir=${srcdir}
2027         srcdir=${srcdir}/gcc . ${lang_frag}
2028         srcdir=${saved_srcdir}
2029         if test x${language} = x; then
2030           echo "${lang_frag} doesn't set \$language." 1>&2
2031           exit 1
2032         fi
2033
2034         if test "$language" = "c++"; then
2035           boot_language=yes
2036         fi
2037
2038         add_this_lang=no
2039         # C is always enabled, so no need to add it again
2040         if test "$language" != "c"; then
2041           case ,${enable_languages}, in
2042             *,${language},*)
2043               # Language was explicitly selected; include it
2044               add_this_lang=yes
2045               ;;
2046             *,all,*)
2047               # All languages are enabled
2048               add_this_lang=all
2049               ;;
2050             *,default,*)
2051               # 'default' was selected, select it if it is a default language
2052               add_this_lang=${build_by_default}
2053               ;;
2054           esac
2055         fi
2056
2057         # Disable languages that need other directories if these aren't available.
2058         for i in $subdir_requires; do
2059           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2060           case ${add_this_lang} in
2061             yes)
2062               # Specifically requested language; tell them.
2063               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2064               ;;
2065             all)
2066               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2067               add_this_lang=unsupported
2068               ;;
2069             *)
2070               # Silently disable.
2071               add_this_lang=unsupported
2072               ;;
2073           esac
2074         done
2075
2076         # Disable Ada if no preexisting GNAT is available.
2077         case ${add_this_lang}:${language}:${have_gnat} in
2078           yes:ada:no)
2079             # Specifically requested language; tell them.
2080             AC_MSG_ERROR([GNAT is required to build $language])
2081             ;;
2082           all:ada:no)
2083             AC_MSG_WARN([GNAT is required to build $language])
2084             add_this_lang=unsupported
2085             ;;
2086           *:ada:no)
2087             # Silently disable.
2088             add_this_lang=unsupported
2089             ;;
2090         esac
2091
2092         # Disable D if no preexisting GDC is available.
2093         case ${add_this_lang}:${language}:${have_gdc} in
2094           yes:d:no)
2095             # Specifically requested language; tell them.
2096             AC_MSG_ERROR([GDC is required to build $language])
2097            ;;
2098           all:d:no)
2099             AC_MSG_WARN([GDC is required to build $language])
2100             add_this_lang=unsupported
2101             ;;
2102           *:d:no)
2103             # Silently disable.
2104             add_this_lang=unsupported
2105             ;;
2106         esac
2107
2108         # Disable jit if -enable-host-shared not specified
2109         # but not if building for Mingw. All code in Windows
2110         # is position independent code (PIC).
2111         case $target in
2112           *mingw*) ;;
2113           *)
2114           case ${add_this_lang}:${language}:${host_shared} in
2115             yes:jit:no)
2116                    # PR jit/64780: explicitly specify --enable-host-shared
2117             AC_MSG_ERROR([
2118 Enabling language "jit" requires --enable-host-shared.
2119
2120 --enable-host-shared typically slows the rest of the compiler down by
2121 a few %, so you must explicitly enable it.
2122
2123 If you want to build both the jit and the regular compiler, it is often
2124 best to do this via two separate configure/builds, in separate
2125 directories, to avoid imposing the performance cost of
2126 --enable-host-shared on the regular compiler.])
2127                     ;;
2128             all:jit:no)
2129               AC_MSG_WARN([--enable-host-shared required to build $language])
2130               add_this_lang=unsupported
2131               ;;
2132             *:jit:no)
2133               # Silently disable.
2134               add_this_lang=unsupported
2135               ;;
2136                 esac
2137           ;;
2138         esac
2139
2140         # Disable a language that is unsupported by the target.
2141         case "${add_this_lang}: $unsupported_languages " in
2142           no:*) ;;
2143           unsupported:*) ;;
2144           *:*" $language "*)
2145             AC_MSG_WARN([${language} not supported for this target])
2146             add_this_lang=unsupported
2147             ;;
2148         esac
2149
2150         case $add_this_lang in
2151           unsupported)
2152             # Remove language-dependent dirs.
2153             disabled_target_libs="$disabled_target_libs $target_libs"
2154             noconfigdirs="$noconfigdirs $lang_dirs"
2155             ;;
2156           no)
2157             # Remove language-dependent dirs; still show language as supported.
2158             disabled_target_libs="$disabled_target_libs $target_libs"
2159             noconfigdirs="$noconfigdirs $lang_dirs"
2160             potential_languages="${potential_languages}${language},"
2161             ;;
2162           all|yes)
2163             new_enable_languages="${new_enable_languages}${language},"
2164             potential_languages="${potential_languages}${language},"
2165             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2166             enabled_target_libs="$enabled_target_libs $target_libs"
2167             case "${boot_language}:,$enable_stage1_languages," in
2168               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2169                 # Add to (comma-separated) list of stage 1 languages.
2170                 case ",$stage1_languages," in
2171                   *,$language,* | ,yes, | ,all,) ;;
2172                   *) stage1_languages="${stage1_languages}${language}," ;;
2173                 esac
2174                 # We need to bootstrap any supporting libraries.
2175                 bootstrap_target_libs=`echo "${bootstrap_target_libs}${target_libs}," | sed "s/ /,/g"`
2176                 ;;
2177             esac
2178             ;;
2179         esac
2180         ;;
2181     esac
2182   done
2183
2184   # Add target libraries which are only needed for disabled languages
2185   # to noconfigdirs.
2186   if test -n "$disabled_target_libs"; then
2187     for dir in $disabled_target_libs; do
2188       case " $enabled_target_libs " in
2189       *" ${dir} "*) ;;
2190       *) noconfigdirs="$noconfigdirs $dir" ;;
2191       esac
2192     done
2193   fi
2194
2195   AC_ARG_ENABLE(stage1-languages,
2196   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2197                   [choose additional languages to build during
2198                   stage1.  Mostly useful for compiler development])],
2199   [case ,${enable_stage1_languages}, in
2200     ,no,|,,)
2201       # Set it to something that will have no effect in the loop below
2202       enable_stage1_languages=c ;;
2203     ,yes,)
2204       enable_stage1_languages=`echo $new_enable_languages | \
2205         sed -e "s/^,//" -e "s/,$//" ` ;;
2206     *,all,*)
2207       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2208         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2209   esac
2210
2211   # Add "good" languages from enable_stage1_languages to stage1_languages,
2212   # while "bad" languages go in missing_languages.  Leave no duplicates.
2213   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2214     case $potential_languages in
2215       *,$i,*)
2216         case $stage1_languages in
2217           *,$i,*) ;;
2218           *) stage1_languages="$stage1_languages$i," ;;
2219         esac ;;
2220       *)
2221         case $missing_languages in
2222           *,$i,*) ;;
2223           *) missing_languages="$missing_languages$i," ;;
2224         esac ;;
2225      esac
2226   done])
2227
2228   # Remove leading/trailing commas that were added for simplicity
2229   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2230   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2231   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2232   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2233
2234   if test "x$missing_languages" != x; then
2235     AC_MSG_ERROR([
2236 The following requested languages could not be built: ${missing_languages}
2237 Supported languages are: ${potential_languages}])
2238   fi
2239   if test "x$new_enable_languages" != "x$enable_languages"; then
2240     echo The following languages will be built: ${new_enable_languages}
2241     enable_languages="$new_enable_languages"
2242   fi
2243
2244   AC_SUBST(stage1_languages)
2245   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2246 fi
2247
2248 # Handle --disable-<component> generically.
2249 for dir in $configdirs $build_configdirs $target_configdirs ; do
2250   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2251   varname=`echo $dirname | sed -e s/+/_/g`
2252   if eval test x\${enable_${varname}} "=" xno ; then
2253     noconfigdirs="$noconfigdirs $dir"
2254   fi
2255 done
2256
2257 # Check for Boehm's garbage collector
2258 AC_ARG_ENABLE(objc-gc,
2259 [AS_HELP_STRING([--enable-objc-gc],
2260                 [enable use of Boehm's garbage collector with the
2261                  GNU Objective-C runtime])])
2262 AC_ARG_WITH([target-bdw-gc],
2263 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2264                 [specify prefix directory for installed bdw-gc package.
2265                  Equivalent to --with-target-bdw-gc-include=PATH/include
2266                  plus --with-target-bdw-gc-lib=PATH/lib])])
2267 AC_ARG_WITH([target-bdw-gc-include],
2268 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2269                 [specify directories for installed bdw-gc include files])])
2270 AC_ARG_WITH([target-bdw-gc-lib],
2271 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2272                 [specify directories for installed bdw-gc library])])
2273
2274 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2275   AC_MSG_CHECKING([for bdw garbage collector])
2276   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2277     dnl no bdw-gw options, assume default locations
2278     AC_MSG_RESULT([using bdw-gc in default locations])
2279   else
2280     dnl bdw-gw options, first error checking, complete checking in libobjc
2281     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2282       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2283     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2284       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2285     else
2286       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2287     fi
2288   fi
2289 esac
2290
2291 # Disable libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2292 case ,${enable_languages}, in
2293   *,c++,*)
2294     # Disable libitm, libsanitizer if we're not building libstdc++
2295     case "${noconfigdirs}" in
2296       *target-libstdc++-v3*)
2297         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2298         ;;
2299       *) ;;
2300     esac
2301     ;;
2302   *)
2303     noconfigdirs="$noconfigdirs target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2304     ;;
2305 esac
2306
2307 # If gcc/ is not in the source tree then we'll not be building a
2308 # target compiler, assume in that case we don't want to build any
2309 # target libraries or tools.
2310 #
2311 # This was added primarily for the benefit for binutils-gdb who reuse
2312 # this configure script, but don't always have target tools available.
2313 if test ! -d ${srcdir}/gcc; then
2314    skipdirs="${skipdirs} ${target_configdirs}"
2315 fi
2316
2317 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2318 # $build_configdirs and $target_configdirs.
2319 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2320
2321 notsupp=""
2322 for dir in . $skipdirs $noconfigdirs ; do
2323   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2324   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2325     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2326     if test -r $srcdir/$dirname/configure ; then
2327       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2328         true
2329       else
2330         notsupp="$notsupp $dir"
2331       fi
2332     fi
2333   fi
2334   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2335     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2336     if test -r $srcdir/$dirname/configure ; then
2337       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2338         true
2339       else
2340         notsupp="$notsupp $dir"
2341       fi
2342     fi
2343   fi
2344   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2345     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2346     if test -r $srcdir/$dirname/configure ; then
2347       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2348         true
2349       else
2350         notsupp="$notsupp $dir"
2351       fi
2352     fi
2353   fi
2354 done
2355
2356 # Quietly strip out all directories which aren't configurable in this tree.
2357 # This relies on all configurable subdirectories being autoconfiscated, which
2358 # is now the case.
2359 build_configdirs_all="$build_configdirs"
2360 build_configdirs=
2361 for i in ${build_configdirs_all} ; do
2362   j=`echo $i | sed -e s/build-//g`
2363   if test -f ${srcdir}/$j/configure ; then
2364     build_configdirs="${build_configdirs} $i"
2365   fi
2366 done
2367
2368 configdirs_all="$configdirs"
2369 configdirs=
2370 for i in ${configdirs_all} ; do
2371   if test -f ${srcdir}/$i/configure ; then
2372     configdirs="${configdirs} $i"
2373   fi
2374 done
2375
2376 target_configdirs_all="$target_configdirs"
2377 target_configdirs=
2378 for i in ${target_configdirs_all} ; do
2379   j=`echo $i | sed -e s/target-//g`
2380   if test -f ${srcdir}/$j/configure ; then
2381     target_configdirs="${target_configdirs} $i"
2382   fi
2383 done
2384
2385 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2386 # so we have to add it after the preceding checks.
2387 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2388 then
2389   case " $configdirs " in
2390     *" libiberty "*)
2391       # If we can build libiberty, we can also build libiberty-linker-plugin.
2392       configdirs="$configdirs libiberty-linker-plugin"
2393       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2394         --with-libiberty=../libiberty-linker-plugin";;
2395     *)
2396       AC_MSG_ERROR([libiberty missing]);;
2397   esac
2398 fi
2399
2400 # Sometimes we have special requirements for the host libiberty.
2401 extra_host_libiberty_configure_flags=
2402 extra_host_zlib_configure_flags=
2403 case " $configdirs " in
2404   *" lto-plugin "* | *" libcc1 "*)
2405     # When these are to be built as shared libraries, the same applies to
2406     # libiberty.
2407     extra_host_libiberty_configure_flags=--enable-shared
2408     ;;
2409   *" bfd "*)
2410     # When bfd is to be built as a shared library, the same applies to
2411     # zlib.
2412     if test "$enable_shared" = "yes"; then
2413       extra_host_zlib_configure_flags=--enable-host-shared
2414     fi
2415     ;;
2416 esac
2417 AC_SUBST(extra_host_libiberty_configure_flags)
2418 AC_SUBST(extra_host_zlib_configure_flags)
2419
2420 # Produce a warning message for the subdirs we can't configure.
2421 # This isn't especially interesting in the Cygnus tree, but in the individual
2422 # FSF releases, it's important to let people know when their machine isn't
2423 # supported by the one or two programs in a package.
2424
2425 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2426   # If $appdirs is non-empty, at least one of those directories must still
2427   # be configured, or we error out.  (E.g., if the gas release supports a
2428   # specified target in some subdirs but not the gas subdir, we shouldn't
2429   # pretend that all is well.)
2430   if test -n "$appdirs" ; then
2431     for dir in $appdirs ; do
2432       if test -r $dir/Makefile.in ; then
2433         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2434           appdirs=""
2435           break
2436         fi
2437         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2438           appdirs=""
2439           break
2440         fi
2441       fi
2442     done
2443     if test -n "$appdirs" ; then
2444       echo "*** This configuration is not supported by this package." 1>&2
2445       exit 1
2446     fi
2447   fi
2448   # Okay, some application will build, or we don't care to check.  Still
2449   # notify of subdirs not getting built.
2450   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2451   echo "    ${notsupp}" 1>&2
2452   echo "    (Any other directories should still work fine.)" 1>&2
2453 fi
2454
2455 case "$host" in
2456   *msdosdjgpp*)
2457     enable_gdbtk=no ;;
2458 esac
2459
2460 # To find our prefix, in gcc_cv_tool_prefix.
2461 ACX_TOOL_DIRS
2462
2463 copy_dirs=
2464
2465 AC_ARG_WITH([build-sysroot],
2466   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2467                   [use sysroot as the system root during the build])],
2468   [if test x"$withval" != x ; then
2469      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2470    fi],
2471   [SYSROOT_CFLAGS_FOR_TARGET=])
2472 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2473
2474 AC_ARG_WITH([debug-prefix-map],
2475   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2476                   [map A to B, C to D ... in debug information])],
2477   [if test x"$withval" != x; then
2478      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2479      for debug_map in $withval; do
2480        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2481      done
2482    fi],
2483   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2484 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2485
2486 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2487 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2488 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2489 # We want to ensure that TARGET libraries (which we know are built with
2490 # gcc) are built with "-O2 -g", so include those options when setting
2491 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2492 if test "x$CFLAGS_FOR_TARGET" = x; then
2493   if test "x${is_cross_compiler}" = xyes; then
2494     CFLAGS_FOR_TARGET="-g -O2"
2495   else
2496     CFLAGS_FOR_TARGET=$CFLAGS
2497     case " $CFLAGS " in
2498       *" -O2 "*) ;;
2499       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2500     esac
2501     case " $CFLAGS " in
2502       *" -g "* | *" -g3 "*) ;;
2503       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2504     esac
2505   fi
2506 fi
2507 AC_SUBST(CFLAGS_FOR_TARGET)
2508
2509 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2510   if test "x${is_cross_compiler}" = xyes; then
2511     CXXFLAGS_FOR_TARGET="-g -O2"
2512   else
2513     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2514     case " $CXXFLAGS " in
2515       *" -O2 "*) ;;
2516       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2517     esac
2518     case " $CXXFLAGS " in
2519       *" -g "* | *" -g3 "*) ;;
2520       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2521     esac
2522   fi
2523 fi
2524 AC_SUBST(CXXFLAGS_FOR_TARGET)
2525
2526 AC_SUBST(LDFLAGS_FOR_TARGET)
2527
2528 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2529 # the named directory are copied to $(tooldir)/sys-include.
2530 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2531   if test x${is_cross_compiler} = xno ; then
2532     echo 1>&2 '***' --with-headers is only supported when cross compiling
2533     exit 1
2534   fi
2535   if test x"${with_headers}" != xyes ; then
2536     x=${gcc_cv_tool_prefix}
2537     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2538   fi
2539 fi
2540
2541 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2542 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2543 # are permitted.
2544 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2545   if test x${is_cross_compiler} = xno ; then
2546     echo 1>&2 '***' --with-libs is only supported when cross compiling
2547     exit 1
2548   fi
2549   if test x"${with_libs}" != xyes ; then
2550     # Copy the libraries in reverse order, so that files in the first named
2551     # library override files in subsequent libraries.
2552     x=${gcc_cv_tool_prefix}
2553     for l in ${with_libs}; do
2554       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2555     done
2556   fi
2557 fi
2558
2559 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2560 #
2561 # This is done by determining whether or not the appropriate directory
2562 # is available, and by checking whether or not specific configurations
2563 # have requested that this magic not happen.
2564 #
2565 # The command line options always override the explicit settings in
2566 # configure.ac, and the settings in configure.ac override this magic.
2567 #
2568 # If the default for a toolchain is to use GNU as and ld, and you don't
2569 # want to do that, then you should use the --without-gnu-as and
2570 # --without-gnu-ld options for the configure script.  Similarly, if
2571 # the default is to use the included zlib and you don't want to do that,
2572 # you should use the --with-system-zlib option for the configure script.
2573
2574 if test x${use_gnu_as} = x &&
2575    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2576   with_gnu_as=yes
2577   extra_host_args="$extra_host_args --with-gnu-as"
2578 fi
2579
2580 if test x${use_gnu_ld} = x &&
2581    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2582   with_gnu_ld=yes
2583   extra_host_args="$extra_host_args --with-gnu-ld"
2584 fi
2585
2586 if test x${use_included_zlib} = x &&
2587    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2588   :
2589 else
2590   with_system_zlib=yes
2591   extra_host_args="$extra_host_args --with-system-zlib"
2592 fi
2593
2594 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2595 # can detect this case.
2596
2597 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2598   with_newlib=yes
2599   extra_host_args="$extra_host_args --with-newlib"
2600 fi
2601
2602 # Handle ${copy_dirs}
2603 set fnord ${copy_dirs}
2604 shift
2605 while test $# != 0 ; do
2606   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2607     :
2608   else
2609     echo Copying $1 to $2
2610
2611     # Use the install script to create the directory and all required
2612     # parent directories.
2613     if test -d $2 ; then
2614       :
2615     else
2616       echo >config.temp
2617       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2618     fi
2619
2620     # Copy the directory, assuming we have tar.
2621     # FIXME: Should we use B in the second tar?  Not all systems support it.
2622     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2623
2624     # It is the responsibility of the user to correctly adjust all
2625     # symlinks.  If somebody can figure out how to handle them correctly
2626     # here, feel free to add the code.
2627
2628     echo $1 > $2/COPIED
2629   fi
2630   shift; shift
2631 done
2632
2633 # Determine a target-dependent exec_prefix that the installed
2634 # gcc will search in.  Keep this list sorted by triplet, with
2635 # the *-*-osname triplets last.
2636 md_exec_prefix=
2637 case "${target}" in
2638   i[[34567]]86-pc-msdosdjgpp*)
2639     md_exec_prefix=/dev/env/DJDIR/bin
2640     ;;
2641   *-*-hpux* | \
2642   *-*-nto-qnx* | \
2643   *-*-solaris2*)
2644     md_exec_prefix=/usr/ccs/bin
2645     ;;
2646 esac
2647
2648 extra_arflags_for_target=
2649 extra_nmflags_for_target=
2650 extra_ranlibflags_for_target=
2651 target_makefile_frag=/dev/null
2652 case "${target}" in
2653   spu-*-*)
2654     target_makefile_frag="config/mt-spu"
2655     ;;
2656   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2657     target_makefile_frag="config/mt-sde"
2658     ;;
2659   mipsisa*-*-elfoabi*)
2660     target_makefile_frag="config/mt-mips-elfoabi"
2661     ;;
2662   mips*-*-*linux* | mips*-*-gnu*)
2663     target_makefile_frag="config/mt-mips-gnu"
2664     ;;
2665   nios2-*-elf*)
2666     target_makefile_frag="config/mt-nios2-elf"
2667     ;;
2668   *-*-linux-android*)
2669     target_makefile_frag="config/mt-android"
2670     ;;
2671   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2672     target_makefile_frag="config/mt-gnu"
2673     ;;
2674   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2675     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2676     # commands to handle both 32-bit and 64-bit objects.  These flags are
2677     # harmless if we're using GNU nm or ar.
2678     extra_arflags_for_target=" -X32_64"
2679     extra_nmflags_for_target=" -B -X32_64"
2680     ;;
2681 esac
2682
2683 alphaieee_frag=/dev/null
2684 case $target in
2685   alpha*-*-*)
2686     # This just makes sure to use the -mieee option to build target libs.
2687     # This should probably be set individually by each library.
2688     alphaieee_frag="config/mt-alphaieee"
2689     ;;
2690 esac
2691
2692 # If --enable-target-optspace always use -Os instead of -O2 to build
2693 # the target libraries, similarly if it is not specified, use -Os
2694 # on selected platforms.
2695 ospace_frag=/dev/null
2696 case "${enable_target_optspace}:${target}" in
2697   yes:*)
2698     ospace_frag="config/mt-ospace"
2699     ;;
2700   :d30v-*)
2701     ospace_frag="config/mt-d30v"
2702     ;;
2703   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2704     ospace_frag="config/mt-ospace"
2705     ;;
2706   no:* | :*)
2707     ;;
2708   *)
2709     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2710     ;;
2711 esac
2712
2713 # Some systems (e.g., one of the i386-aix systems the gas testers are
2714 # using) don't handle "\$" correctly, so don't use it here.
2715 tooldir='${exec_prefix}'/${target_noncanonical}
2716 build_tooldir=${tooldir}
2717
2718 # Create a .gdbinit file which runs the one in srcdir
2719 # and tells GDB to look there for source files.
2720
2721 if test -r ${srcdir}/.gdbinit ; then
2722   case ${srcdir} in
2723     .) ;;
2724     *) cat > ./.gdbinit <<EOF
2725 # ${NO_EDIT}
2726 dir ${srcdir}
2727 dir .
2728 source ${srcdir}/.gdbinit
2729 EOF
2730     ;;
2731   esac
2732 fi
2733
2734 # Make sure that the compiler is able to generate an executable.  If it
2735 # can't, we are probably in trouble.  We don't care whether we can run the
2736 # executable--we might be using a cross compiler--we only care whether it
2737 # can be created.  At this point the main configure script has set CC.
2738 we_are_ok=no
2739 echo "int main () { return 0; }" > conftest.c
2740 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2741 if test $? = 0 ; then
2742   if test -s conftest || test -s conftest.exe ; then
2743     we_are_ok=yes
2744   fi
2745 fi
2746 case $we_are_ok in
2747   no)
2748     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2749     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2750     rm -f conftest*
2751     exit 1
2752     ;;
2753 esac
2754 rm -f conftest*
2755
2756 # Decide which environment variable is used to find dynamic libraries.
2757 case "${host}" in
2758   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2759   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2760   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2761   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2762 esac
2763
2764 # On systems where the dynamic library environment variable is PATH,
2765 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2766 # built executables to PATH.
2767 if test "$RPATH_ENVVAR" = PATH; then
2768   GCC_SHLIB_SUBDIR=/shlib
2769 else
2770   GCC_SHLIB_SUBDIR=
2771 fi
2772
2773 # Adjust the toplevel makefile according to whether bootstrap was selected.
2774 case $enable_bootstrap in
2775   yes)
2776     bootstrap_suffix=bootstrap
2777     BUILD_CONFIG=bootstrap-debug
2778     ;;
2779   no)
2780     bootstrap_suffix=no-bootstrap
2781     BUILD_CONFIG=
2782     ;;
2783 esac
2784
2785 AC_MSG_CHECKING(for default BUILD_CONFIG)
2786
2787 AC_ARG_WITH([build-config],
2788   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2789                   [use config/NAME.mk build configuration])],
2790   [case $with_build_config in
2791    yes) with_build_config= ;;
2792    no) with_build_config= BUILD_CONFIG= ;;
2793    esac])
2794
2795 if test "x${with_build_config}" != x; then
2796   BUILD_CONFIG=$with_build_config
2797 else
2798   case $BUILD_CONFIG in
2799   bootstrap-debug)
2800     if echo "int f (void) { return 0; }" > conftest.c &&
2801        ${CC} -c conftest.c &&
2802        mv conftest.o conftest.o.g0 &&
2803        ${CC} -c -g conftest.c &&
2804        mv conftest.o conftest.o.g &&
2805        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2806       :
2807     else
2808       BUILD_CONFIG=
2809     fi
2810     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2811     ;;
2812   esac
2813 fi
2814 AC_MSG_RESULT($BUILD_CONFIG)
2815 AC_SUBST(BUILD_CONFIG)
2816
2817 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2818 AC_MSG_CHECKING([for --enable-vtable-verify])
2819 AC_ARG_ENABLE(vtable-verify,
2820 [AS_HELP_STRING([--enable-vtable-verify],
2821                 [Enable vtable verification feature])],
2822 [case "$enableval" in
2823  yes) enable_vtable_verify=yes ;;
2824  no)  enable_vtable_verify=no ;;
2825  *)   enable_vtable_verify=no;;
2826  esac],
2827 [enable_vtable_verify=no])
2828 AC_MSG_RESULT($enable_vtable_verify)
2829
2830 # Record target_configdirs and the configure arguments for target and
2831 # build configuration in Makefile.
2832 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2833 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2834 bootstrap_fixincludes=no
2835
2836 # If we are building libgomp, bootstrap it.
2837 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2838   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2839 fi
2840
2841 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2842 # or bootstrap-ubsan, bootstrap it.
2843 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2844   case "$BUILD_CONFIG" in
2845     *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
2846       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2847       bootstrap_fixincludes=yes
2848       ;;
2849   esac
2850 fi
2851
2852 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2853 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2854    test "$enable_vtable_verify" != no; then
2855   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2856 fi
2857
2858 # If we are building libatomic and the list of enabled languages includes the
2859 # D frontend, bootstrap it.
2860 if echo " ${target_configdirs} " | grep " libatomic " > /dev/null 2>&1; then
2861   case ,${enable_languages}, in
2862     *,d,*)
2863       bootstrap_target_libs=${bootstrap_target_libs}target-libatomic,
2864       ;;
2865   esac
2866 fi
2867
2868 # Determine whether gdb needs tk/tcl or not.
2869 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2870 # and in that case we want gdb to be built without tk.  Ugh!
2871 # In fact I believe gdb is the *only* package directly dependent on tk,
2872 # so we should be able to put the 'maybe's in unconditionally and
2873 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2874 # 100% sure that that's safe though.
2875
2876 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2877 case "$enable_gdbtk" in
2878   no)
2879     GDB_TK="" ;;
2880   yes)
2881     GDB_TK="${gdb_tk}" ;;
2882   *)
2883     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2884     # distro.  Eventually someone will fix this and move Insight, nee
2885     # gdbtk to a separate directory.
2886     if test -d ${srcdir}/gdb/gdbtk ; then
2887       GDB_TK="${gdb_tk}"
2888     else
2889       GDB_TK=""
2890     fi
2891     ;;
2892 esac
2893 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2894 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2895
2896 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
2897 # else does, only include them if one of these is built.  The Makefile
2898 # provides the ordering, so it's enough here to add to the list.
2899 case " ${configdirs} " in
2900   *\ gdb\ *)
2901     configdirs="${configdirs} gnulib gdbsupport"
2902     ;;
2903   *\ gdbserver\ *)
2904     configdirs="${configdirs} gnulib gdbsupport"
2905     ;;
2906   *\ sim\ *)
2907     configdirs="${configdirs} gnulib"
2908     ;;
2909 esac
2910
2911 # Strip out unwanted targets.
2912
2913 # While at that, we remove Makefiles if we were started for recursive
2914 # configuration, so that the top-level Makefile reconfigures them,
2915 # like we used to do when configure itself was recursive.
2916
2917 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2918 # but now we're fixing up the Makefile ourselves with the additional
2919 # commands passed to AC_CONFIG_FILES.  Use separate variables
2920 # extrasub-{build,host,target} not because there is any reason to split
2921 # the substitutions up that way, but only to remain below the limit of
2922 # 99 commands in a script, for HP-UX sed.
2923
2924 # Do not nest @if/@endif or @unless/@endunless pairs, because
2925 # configure will not warn you at all.
2926
2927 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2928   yes:yes:*\ gold\ *:*,c++,*) ;;
2929   yes:yes:*\ gold\ *:*)
2930     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2931     ;;
2932 esac
2933
2934 extrasub_build=
2935 for module in ${build_configdirs} ; do
2936   if test -z "${no_recursion}" \
2937      && test -f ${build_subdir}/${module}/Makefile; then
2938     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2939     rm -f ${build_subdir}/${module}/Makefile
2940   fi
2941   extrasub_build="$extrasub_build
2942 /^@if build-$module\$/d
2943 /^@endif build-$module\$/d
2944 /^@unless build-$module\$/,/^@endunless build-$module\$/d
2945 /^@if build-$module-$bootstrap_suffix\$/d
2946 /^@endif build-$module-$bootstrap_suffix\$/d
2947 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
2948 done
2949 extrasub_host=
2950 for module in ${configdirs} ; do
2951   if test -z "${no_recursion}"; then
2952     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2953       if test -f ${file}; then
2954         echo 1>&2 "*** removing ${file} to force reconfigure"
2955         rm -f ${file}
2956       fi
2957     done
2958   fi
2959   case ${module},${bootstrap_fixincludes} in
2960     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2961     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2962   esac
2963   extrasub_host="$extrasub_host
2964 /^@if $module\$/d
2965 /^@endif $module\$/d
2966 /^@unless $module\$/,/^@endunless $module\$/d
2967 /^@if $module-$host_bootstrap_suffix\$/d
2968 /^@endif $module-$host_bootstrap_suffix\$/d
2969 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
2970 done
2971 extrasub_target=
2972 for module in ${target_configdirs} ; do
2973   if test -z "${no_recursion}" \
2974      && test -f ${target_subdir}/${module}/Makefile; then
2975     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2976     rm -f ${target_subdir}/${module}/Makefile
2977   fi
2978
2979   # We only bootstrap target libraries listed in bootstrap_target_libs.
2980   case $bootstrap_target_libs in
2981     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2982     *) target_bootstrap_suffix=no-bootstrap ;;
2983   esac
2984
2985   extrasub_target="$extrasub_target
2986 /^@if target-$module\$/d
2987 /^@endif target-$module\$/d
2988 /^@unless target-$module\$/,/^@endunless target-$module\$/d
2989 /^@if target-$module-$target_bootstrap_suffix\$/d
2990 /^@endif target-$module-$target_bootstrap_suffix\$/d
2991 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
2992 done
2993
2994 # Do the final fixup along with target modules.
2995 extrasub_target="$extrasub_target
2996 /^@if /,/^@endif /d
2997 /^@unless /d
2998 /^@endunless /d"
2999
3000 # Create the serialization dependencies.  This uses a temporary file.
3001
3002 AC_ARG_ENABLE([serial-configure],
3003 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
3004                 [force sequential configuration of
3005                  sub-packages for the host, target or build
3006                  machine, or all sub-packages])])
3007
3008 case ${enable_serial_configure} in
3009   yes)
3010     enable_serial_build_configure=yes
3011     enable_serial_host_configure=yes
3012     enable_serial_target_configure=yes
3013     ;;
3014 esac
3015
3016 # These force 'configure's to be done one at a time, to avoid problems
3017 # with contention over a shared config.cache.
3018 rm -f serdep.tmp
3019 echo '# serdep.tmp' > serdep.tmp
3020 olditem=
3021 test "x${enable_serial_build_configure}" = xyes &&
3022 for item in ${build_configdirs} ; do
3023   case ${olditem} in
3024     "") ;;
3025     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
3026   esac
3027   olditem=${item}
3028 done
3029 olditem=
3030 test "x${enable_serial_host_configure}" = xyes &&
3031 for item in ${configdirs} ; do
3032   case ${olditem} in
3033     "") ;;
3034     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
3035   esac
3036   olditem=${item}
3037 done
3038 olditem=
3039 test "x${enable_serial_target_configure}" = xyes &&
3040 for item in ${target_configdirs} ; do
3041   case ${olditem} in
3042     "") ;;
3043     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
3044   esac
3045   olditem=${item}
3046 done
3047 serialization_dependencies=serdep.tmp
3048 AC_SUBST_FILE(serialization_dependencies)
3049
3050 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
3051 # target, nonopt, and variable assignments.  These are the ones we
3052 # might not want to pass down to subconfigures.  The exception being
3053 # --cache-file=/dev/null, which is used to turn off the use of cache
3054 # files altogether, and which should be passed on to subconfigures.
3055 # Also strip program-prefix, program-suffix, and program-transform-name,
3056 # so that we can pass down a consistent program-transform-name.
3057 baseargs=
3058 tbaseargs=
3059 keep_next=no
3060 skip_next=no
3061 eval "set -- $ac_configure_args"
3062 for ac_arg
3063 do
3064   if test X"$skip_next" = X"yes"; then
3065     skip_next=no
3066     continue
3067   fi
3068   if test X"$keep_next" = X"yes"; then
3069     case $ac_arg in
3070       *\'*)
3071         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3072     esac
3073     baseargs="$baseargs '$ac_arg'"
3074     tbaseargs="$tbaseargs '$ac_arg'"
3075     keep_next=no
3076     continue
3077   fi
3078
3079   # Handle separated arguments.  Based on the logic generated by
3080   # autoconf 2.59.
3081   case $ac_arg in
3082     *=* | --config-cache | -C | -disable-* | --disable-* \
3083       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3084       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3085       | -with-* | --with-* | -without-* | --without-* | --x)
3086       separate_arg=no
3087       ;;
3088     -*)
3089       separate_arg=yes
3090       ;;
3091     *)
3092       separate_arg=no
3093       ;;
3094   esac
3095
3096   skip_targ=no
3097   case $ac_arg in
3098 changequote(,)
3099   --with-* | --without-*)
3100     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3101
3102     case $libopt in
3103     *[-_]include)
3104       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3105       ;;
3106     *[-_]lib)
3107       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3108       ;;
3109     *)
3110       lib=$libopt
3111       ;;
3112     esac
3113 changequote([,])
3114
3115     case $lib in
3116     mpc | mpfr | gmp | isl)
3117       # If we're processing --with-$lib, --with-$lib-include or
3118       # --with-$lib-lib, for one of the libs above, and target is
3119       # different from host, don't pass the current argument to any
3120       # target library's configure.
3121       if test x$is_cross_compiler = xyes; then
3122         skip_targ=yes
3123       fi
3124       ;;
3125     esac
3126     ;;
3127   esac
3128
3129   case "$ac_arg" in
3130     --cache-file=/dev/null | \
3131     -cache-file=/dev/null )
3132       # Handled here to avoid the test to skip args below.
3133       baseargs="$baseargs '$ac_arg'"
3134       tbaseargs="$tbaseargs '$ac_arg'"
3135       # Assert: $separate_arg should always be no.
3136       keep_next=$separate_arg
3137       ;;
3138     --no*)
3139       continue
3140       ;;
3141     --c* | \
3142     --sr* | \
3143     --ho* | \
3144     --bu* | \
3145     --t* | \
3146     --program-* | \
3147     -cache_file* | \
3148     -srcdir* | \
3149     -host* | \
3150     -build* | \
3151     -target* | \
3152     -program-prefix* | \
3153     -program-suffix* | \
3154     -program-transform-name* )
3155       skip_next=$separate_arg
3156       continue
3157       ;;
3158     -*)
3159       # An option.  Add it.
3160       case $ac_arg in
3161         *\'*)
3162           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3163       esac
3164       baseargs="$baseargs '$ac_arg'"
3165       if test X"$skip_targ" = Xno; then
3166         tbaseargs="$tbaseargs '$ac_arg'"
3167       fi
3168       keep_next=$separate_arg
3169       ;;
3170     *)
3171       # Either a variable assignment, or a nonopt (triplet).  Don't
3172       # pass it down; let the Makefile handle this.
3173       continue
3174       ;;
3175   esac
3176 done
3177 # Remove the initial space we just introduced and, as these will be
3178 # expanded by make, quote '$'.
3179 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3180
3181 # Add in --program-transform-name, after --program-prefix and
3182 # --program-suffix have been applied to it.  Autoconf has already
3183 # doubled dollar signs and backslashes in program_transform_name; we want
3184 # the backslashes un-doubled, and then the entire thing wrapped in single
3185 # quotes, because this will be expanded first by make and then by the shell.
3186 # Also, because we want to override the logic in subdir configure scripts to
3187 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3188 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3189 ${program_transform_name}
3190 EOF_SED
3191 gcc_transform_name=`cat conftestsed.out`
3192 rm -f conftestsed.out
3193 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3194 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3195 if test "$silent" = yes; then
3196   baseargs="$baseargs --silent"
3197   tbaseargs="$tbaseargs --silent"
3198 fi
3199 baseargs="$baseargs --disable-option-checking"
3200 tbaseargs="$tbaseargs --disable-option-checking"
3201
3202 # Record and document user additions to sub configure arguments.
3203 AC_ARG_VAR([build_configargs],
3204            [additional configure arguments for build directories])
3205 AC_ARG_VAR([host_configargs],
3206            [additional configure arguments for host directories])
3207 AC_ARG_VAR([target_configargs],
3208            [additional configure arguments for target directories])
3209
3210 # For the build-side libraries, we just need to pretend we're native,
3211 # and not use the same cache file.  Multilibs are neither needed nor
3212 # desired.  We can't even use the same cache file for all build-side
3213 # libraries, as they're compiled differently; some with C, some with
3214 # C++ or with different feature-enabling options.
3215 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3216
3217 # For host modules, accept cache file option, or specification as blank.
3218 case "${cache_file}" in
3219 "") # empty
3220   cache_file_option="" ;;
3221 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3222   cache_file_option="--cache-file=${cache_file}" ;;
3223 *) # relative path
3224   cache_file_option="--cache-file=../${cache_file}" ;;
3225 esac
3226
3227 # Host dirs don't like to share a cache file either, horribly enough.
3228 # This seems to be due to autoconf 2.5x stupidity.
3229 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3230
3231 target_configargs="$target_configargs ${tbaseargs}"
3232
3233 # Passing a --with-cross-host argument lets the target libraries know
3234 # whether they are being built with a cross-compiler or being built
3235 # native.  However, it would be better to use other mechanisms to make the
3236 # sorts of decisions they want to make on this basis.  Please consider
3237 # this option to be deprecated.  FIXME.
3238 if test x${is_cross_compiler} = xyes ; then
3239   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3240 fi
3241
3242 # Special user-friendly check for native x86_64-linux build, if
3243 # multilib is not explicitly enabled.
3244 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3245   x86_64-*linux*:yes:$build:$build:)
3246     # Make sure we have a development environment that handles 32-bit
3247     dev64=no
3248     echo "int main () { return 0; }" > conftest.c
3249     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3250     if test $? = 0 ; then
3251       if test -s conftest || test -s conftest.exe ; then
3252         dev64=yes
3253       fi
3254     fi
3255     rm -f conftest*
3256     if test x${dev64} != xyes ; then
3257       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.])
3258     fi
3259     ;;
3260 esac
3261
3262 # Default to --enable-multilib.
3263 if test x${enable_multilib} = x ; then
3264   target_configargs="--enable-multilib ${target_configargs}"
3265 fi
3266
3267 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3268 # changed from the earlier setting of with_newlib.
3269 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3270   target_configargs="--with-newlib ${target_configargs}"
3271 fi
3272
3273 # Different target subdirs use different values of certain variables
3274 # (notably CXX).  Worse, multilibs use *lots* of different values.
3275 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3276 # it doesn't automatically accept command-line overrides of them.
3277 # This means it's not safe for target subdirs to share a cache file,
3278 # which is disgusting, but there you have it.  Hopefully this can be
3279 # fixed in future.  It's still worthwhile to use a cache file for each
3280 # directory.  I think.
3281
3282 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3283 # We need to pass --target, as newer autoconf's requires consistency
3284 # for target_alias and gcc doesn't manage it consistently.
3285 target_configargs="--cache-file=./config.cache ${target_configargs}"
3286
3287 FLAGS_FOR_TARGET=
3288 case " $target_configdirs " in
3289  *" newlib "*)
3290   case " $target_configargs " in
3291   *" --with-newlib "*)
3292    case "$target" in
3293     *-cygwin*)
3294       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3295       ;;
3296    esac
3297
3298    # If we're not building GCC, don't discard standard headers.
3299    if test -d ${srcdir}/gcc; then
3300      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3301
3302      if test "${build}" != "${host}"; then
3303        # On Canadian crosses, CC_FOR_TARGET will have already been set
3304        # by `configure', so we won't have an opportunity to add -Bgcc/
3305        # to it.  This is right: we don't want to search that directory
3306        # for binaries, but we want the header files in there, so add
3307        # them explicitly.
3308        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3309
3310        # Someone might think of using the pre-installed headers on
3311        # Canadian crosses, in case the installed compiler is not fully
3312        # compatible with the compiler being built.  In this case, it
3313        # would be better to flag an error than risking having
3314        # incompatible object files being constructed.  We can't
3315        # guarantee that an error will be flagged, but let's hope the
3316        # compiler will do it, when presented with incompatible header
3317        # files.
3318      fi
3319    fi
3320
3321    case "${target}-${is_cross_compiler}" in
3322    i[[3456789]]86-*-linux*-no)
3323       # Here host == target, so we don't need to build gcc,
3324       # so we don't want to discard standard headers.
3325       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3326       ;;
3327    *)
3328       # If we're building newlib, use its generic headers last, but search
3329       # for any libc-related directories first (so make it the last -B
3330       # switch).
3331       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3332
3333       # If we're building libgloss, find the startup file, simulator library
3334       # and linker script.
3335       case " $target_configdirs " in
3336         *" libgloss "*)
3337         # Look for startup file, simulator library and maybe linker script.
3338         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3339         # Look for libnosys.a in case the target needs it.
3340         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3341         # Most targets have the linker script in the source directory.
3342         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3343         ;;
3344       esac
3345       ;;
3346    esac
3347    ;;
3348   esac
3349   ;;
3350 esac
3351
3352 case "$target" in
3353   x86_64-*mingw* | *-w64-mingw*)
3354   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3355   # however, use a symlink named 'mingw' in ${prefix} .
3356     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3357     ;;
3358   *-mingw*)
3359   # MinGW can't be handled as Cygwin above since it does not use newlib.
3360     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3361     ;;
3362 esac
3363
3364 # Allow the user to override the flags for
3365 # our build compiler if desired.
3366 if test x"${build}" = x"${host}" ; then
3367   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3368   CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
3369   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3370   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3371 fi
3372
3373 # On Canadian crosses, we'll be searching the right directories for
3374 # the previously-installed cross compiler, so don't bother to add
3375 # flags for directories within the install tree of the compiler
3376 # being built; programs in there won't even run.
3377 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3378   # Search for pre-installed headers if nothing else fits.
3379   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3380 fi
3381
3382 if test "x${use_gnu_ld}" = x &&
3383    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3384   # Arrange for us to find uninstalled linker scripts.
3385   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3386 fi
3387
3388 # Search for other target-specific linker scripts and such.
3389 case "${target}" in
3390   mep*)
3391     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3392     ;;
3393 esac
3394
3395 # Makefile fragments.
3396 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3397 do
3398   eval fragval=\$$frag
3399   if test $fragval != /dev/null; then
3400     eval $frag=${srcdir}/$fragval
3401   fi
3402 done
3403 AC_SUBST_FILE(host_makefile_frag)
3404 AC_SUBST_FILE(target_makefile_frag)
3405 AC_SUBST_FILE(alphaieee_frag)
3406 AC_SUBST_FILE(ospace_frag)
3407
3408 # Miscellanea: directories, flags, etc.
3409 AC_SUBST(RPATH_ENVVAR)
3410 AC_SUBST(GCC_SHLIB_SUBDIR)
3411 AC_SUBST(tooldir)
3412 AC_SUBST(build_tooldir)
3413 AC_SUBST(CONFIGURE_GDB_TK)
3414 AC_SUBST(GDB_TK)
3415 AC_SUBST(INSTALL_GDB_TK)
3416
3417 # Build module lists & subconfigure args.
3418 AC_SUBST(build_configargs)
3419 AC_SUBST(build_configdirs)
3420
3421 # Host module lists & subconfigure args.
3422 AC_SUBST(host_configargs)
3423 AC_SUBST(configdirs)
3424 AC_SUBST(target_configdirs)
3425
3426 # Target module lists & subconfigure args.
3427 AC_SUBST(target_configargs)
3428
3429
3430 # Build tools.
3431 AC_SUBST(AR_FOR_BUILD)
3432 AC_SUBST(AS_FOR_BUILD)
3433 AC_SUBST(CC_FOR_BUILD)
3434 AC_SUBST(CFLAGS_FOR_BUILD)
3435 AC_SUBST(CPP_FOR_BUILD)
3436 AC_SUBST(CPPFLAGS_FOR_BUILD)
3437 AC_SUBST(CXXFLAGS_FOR_BUILD)
3438 AC_SUBST(CXX_FOR_BUILD)
3439 AC_SUBST(DLLTOOL_FOR_BUILD)
3440 AC_SUBST(DSYMUTIL_FOR_BUILD)
3441 AC_SUBST(GFORTRAN_FOR_BUILD)
3442 AC_SUBST(GOC_FOR_BUILD)
3443 AC_SUBST(GDC_FOR_BUILD)
3444 AC_SUBST(LDFLAGS_FOR_BUILD)
3445 AC_SUBST(LD_FOR_BUILD)
3446 AC_SUBST(NM_FOR_BUILD)
3447 AC_SUBST(RANLIB_FOR_BUILD)
3448 AC_SUBST(WINDMC_FOR_BUILD)
3449 AC_SUBST(WINDRES_FOR_BUILD)
3450
3451 # Generate default definitions for YACC, M4, LEX and other programs that run
3452 # on the build machine.  These are used if the Makefile can't locate these
3453 # programs in objdir.
3454 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3455
3456 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3457 case " $build_configdirs " in
3458   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3459 esac
3460
3461 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3462 case " $build_configdirs " in
3463   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3464 esac
3465
3466 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3467 case " $build_configdirs " in
3468   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3469 esac
3470
3471 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3472 case " $build_configdirs " in
3473   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3474   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3475 esac
3476
3477 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3478 case " $build_configdirs " in
3479   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3480 esac
3481
3482 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3483 case " $build_configdirs " in
3484   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3485   *)
3486 changequote(,)
3487     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3488     # higher, else we use the "missing" dummy.
3489     if ${MAKEINFO} --version \
3490        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3491       :
3492     else
3493       MAKEINFO="$MISSING makeinfo"
3494     fi
3495     ;;
3496 changequote([,])
3497 esac
3498
3499 # FIXME: expect and dejagnu may become build tools?
3500
3501 AC_CHECK_PROGS(EXPECT, expect, expect)
3502 case " $configdirs " in
3503   *" expect "*)
3504     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3505     ;;
3506 esac
3507
3508 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3509 case " $configdirs " in
3510   *" dejagnu "*)
3511     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3512     ;;
3513 esac
3514
3515
3516 # Host tools.
3517 NCN_STRICT_CHECK_TOOLS(AR, ar)
3518 NCN_STRICT_CHECK_TOOLS(AS, as)
3519 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3520 NCN_STRICT_CHECK_TOOLS(DSYMUTIL, dsymutil)
3521 NCN_STRICT_CHECK_TOOLS(LD, ld)
3522 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3523 NCN_STRICT_CHECK_TOOLS(NM, nm)
3524 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3525 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3526 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3527 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3528 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3529 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3530 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3531 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3532 AC_SUBST(CC)
3533 AC_SUBST(CXX)
3534 AC_SUBST(CFLAGS)
3535 AC_SUBST(CXXFLAGS)
3536 AC_SUBST(GDC)
3537 AC_SUBST(GDCFLAGS)
3538
3539 GCC_PLUGIN_OPTION(PLUGIN_OPTION)
3540 AR_PLUGIN_OPTION=
3541 RANLIB_PLUGIN_OPTION=
3542 if test -n "$PLUGIN_OPTION"; then
3543   if $AR --help 2>&1 | grep -q "\--plugin"; then
3544     AR_PLUGIN_OPTION="$PLUGIN_OPTION"
3545   fi
3546   if $RANLIB --help 2>&1 | grep -q "\--plugin"; then
3547     RANLIB_PLUGIN_OPTION="$PLUGIN_OPTION"
3548   fi
3549 fi
3550 AC_SUBST(AR_PLUGIN_OPTION)
3551 AC_SUBST(RANLIB_PLUGIN_OPTION)
3552
3553 # Target tools.
3554 AC_ARG_WITH([build-time-tools],
3555   [AS_HELP_STRING([--with-build-time-tools=PATH],
3556                   [use given path to find target tools during the build])],
3557   [case x"$withval" in
3558      x/*) ;;
3559      *)
3560        with_build_time_tools=
3561        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3562        ;;
3563    esac],
3564   [with_build_time_tools=])
3565
3566 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3567 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3568 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3569 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3570 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3571 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3572
3573 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3574 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3575 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3576 ACX_CHECK_INSTALLED_TARGET_TOOL(DSYMUTIL_FOR_TARGET, dsymutil)
3577 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3578 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3579 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3580 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3581 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3582 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3583 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3584 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3585 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3586 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3587 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3588
3589 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3590
3591 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3592 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3593 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3594 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3595 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3596                 [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],
3597                 c++)
3598 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3599                 [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],
3600                 c++)
3601 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3602 GCC_TARGET_TOOL(dsymutil, DSYMUTIL_FOR_TARGET, DSYMUTIL)
3603 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3604 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3605                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3606 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3607                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3608 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3609                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3610 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3611 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3612 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3613 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3614 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3615 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3616 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3617 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3618 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3619 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3620 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3621
3622 AC_SUBST(FLAGS_FOR_TARGET)
3623 AC_SUBST(RAW_CXX_FOR_TARGET)
3624
3625 # Certain tools may need extra flags.
3626 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3627 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3628 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3629
3630 # When building target libraries, except in a Canadian cross, we use
3631 # the same toolchain as the compiler we just built.
3632 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3633 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3634 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3635 if test $host = $build; then
3636   case " $configdirs " in
3637     *" gcc "*)
3638       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3639       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3640       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3641       ;;
3642   esac
3643 fi
3644
3645 AC_SUBST(COMPILER_AS_FOR_TARGET)
3646 AC_SUBST(COMPILER_LD_FOR_TARGET)
3647 AC_SUBST(COMPILER_NM_FOR_TARGET)
3648
3649 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3650 AC_ARG_ENABLE(maintainer-mode,
3651 [AS_HELP_STRING([--enable-maintainer-mode],
3652                 [enable make rules and dependencies not useful
3653                  (and sometimes confusing) to the casual installer])],
3654       USE_MAINTAINER_MODE=$enableval,
3655       USE_MAINTAINER_MODE=no)
3656 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3657 AC_SUBST(MAINTAINER_MODE_TRUE)
3658 AC_SUBST(MAINTAINER_MODE_FALSE)
3659 if test "$USE_MAINTAINER_MODE" = yes; then
3660   MAINTAINER_MODE_TRUE=
3661   MAINTAINER_MODE_FALSE='#'
3662 else
3663   MAINTAINER_MODE_TRUE='#'
3664   MAINTAINER_MODE_FALSE=
3665 fi
3666 MAINT=$MAINTAINER_MODE_TRUE
3667 AC_SUBST(MAINT)dnl
3668
3669 # ---------------------
3670 # GCC bootstrap support
3671 # ---------------------
3672
3673 # Stage specific cflags for build.
3674 stage1_cflags="-g"
3675 case $build in
3676   vax-*-*)
3677     case ${GCC} in
3678       yes) stage1_cflags="-g -Wa,-J" ;;
3679       *) stage1_cflags="-g -J" ;;
3680     esac ;;
3681 esac
3682
3683 AC_SUBST(stage1_cflags)
3684
3685 # Enable --enable-checking in stage1 of the compiler.
3686 AC_ARG_ENABLE(stage1-checking,
3687 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3688                 [choose additional checking for stage1 of the compiler])],
3689 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3690 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3691   # For --disable-checking or implicit --enable-checking=release, avoid
3692   # setting --enable-checking=gc in the default stage1 checking for LTO
3693   # bootstraps.  See PR62077.
3694   case $BUILD_CONFIG in
3695     *lto*)
3696       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3697     *)
3698       stage1_checking=--enable-checking=yes,types;;
3699   esac
3700   if test "x$enable_checking" = x && \
3701      test -d ${srcdir}/gcc && \
3702      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3703     stage1_checking=--enable-checking=yes,types,extra
3704   fi
3705 else
3706   stage1_checking=--enable-checking=$enable_checking,types
3707 fi])
3708 AC_SUBST(stage1_checking)
3709
3710 # Enable -Werror in bootstrap stage2 and later.
3711 AC_ARG_ENABLE(werror,
3712 [AS_HELP_STRING([--enable-werror],
3713                 [enable -Werror in bootstrap stage2 and later])],
3714 [
3715 case ${enable_werror} in
3716   yes) stage2_werror_flag="--enable-werror-always" ;;
3717   *) stage2_werror_flag="" ;;
3718 esac
3719 ],
3720 [
3721 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3722   case $BUILD_CONFIG in
3723   bootstrap-debug)
3724       stage2_werror_flag="--enable-werror-always" ;;
3725   "")
3726       stage2_werror_flag="--enable-werror-always" ;;
3727   esac
3728 fi
3729 ])
3730
3731 AC_SUBST(stage2_werror_flag)
3732
3733 # Specify what files to not compare during bootstrap.
3734
3735 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3736 case "$target" in
3737   hppa*64*-*-hpux*) ;;
3738   hppa*-*-hpux*) compare_exclusions="$compare_exclusions | */libgcc/lib2funcs* | gcc/function-tests.o" ;;
3739   powerpc*-ibm-aix*) compare_exclusions="$compare_exclusions | *libgomp*\$(objext)" ;;
3740 esac
3741 AC_SUBST(compare_exclusions)
3742
3743 AC_CONFIG_FILES([Makefile],
3744   [sed "$extrasub_build" Makefile |
3745    sed "$extrasub_host" |
3746    sed "$extrasub_target" > mf$$
3747    mv -f mf$$ Makefile],
3748   [extrasub_build="$extrasub_build"
3749    extrasub_host="$extrasub_host"
3750    extrasub_target="$extrasub_target"])
3751 AC_OUTPUT