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, 2022 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 libiconv libctf libsframe"
 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 gm2tools 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-libatomic \
 155                 target-libitm \
 156                 target-libstdc++-v3 \
 157                 target-libsanitizer \
 158                 target-libvtv \
 159                 target-libssp \
 160                 target-libquadmath \
 161                 target-libgfortran \
 162                 target-libffi \
 163                 target-libobjc \
 164                 target-libada \
 165                 target-libgm2 \
 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 # Don't compile the bundled readline/libreadline.a if --with-system-readline
 252 # is provided.
 253 if test x$with_system_readline = xyes ; then
 254   noconfigdirs="$noconfigdirs readline"
 255 fi
 256
 257 AC_ARG_WITH(zstd,
 258 [AS_HELP_STRING([--with-zstd], [Support zstd compressed debug sections (default=auto)])])
 259
 260 # some tools are so dependent upon X11 that if we're not building with X,
 261 # it's not even worth trying to configure, much less build, that tool.
 262
 263 case ${with_x} in
 264   yes | "") ;; # the default value for this tree is that X11 is available
 265   no)
 266     skipdirs="${skipdirs} tk itcl libgui"
 267     # We won't be able to build gdbtk without X.
 268     enable_gdbtk=no
 269     ;;
 270   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 271 esac
 272
 273 # Some are only suitable for cross toolchains.
 274 # Remove these if host=target.
 275 cross_only="target-libgloss target-newlib target-opcodes"
 276
 277 case $is_cross_compiler in
 278   no) skipdirs="${skipdirs} ${cross_only}" ;;
 279 esac
 280
 281 # If both --with-headers and --with-libs are specified, default to
 282 # --without-newlib.
 283 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 284    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 285   if test x"${with_newlib}" = x ; then
 286     with_newlib=no
 287   fi
 288 fi
 289
 290 # Recognize --with-newlib/--without-newlib.
 291 case ${with_newlib} in
 292   no) skipdirs="${skipdirs} target-newlib" ;;
 293   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 294 esac
 295
 296 AC_ARG_ENABLE(as-accelerator-for,
 297 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 298                 [build as offload target compiler.
 299                 Specify offload host triple by ARG])])
 300
 301 AC_ARG_ENABLE(offload-targets,
 302 [AS_HELP_STRING([--enable-offload-targets=LIST],
 303                 [enable offloading to devices from comma-separated LIST of
 304                 TARGET[=DIR]. Use optional path to find offload target compiler
 305                 during the build])],
 306 [
 307   if test x"$enable_offload_targets" = x; then
 308     AC_MSG_ERROR([no offload targets specified])
 309   fi
 310 ], [enable_offload_targets=])
 311
 312 AC_ARG_ENABLE(offload-defaulted,
 313 [AS_HELP_STRING([--enable-offload-defaulted]
 314                 [If enabled, configured but not installed offload compilers and
 315                 libgomp plugins are silently ignored.  Useful for distribution
 316                 compilers where those are in separate optional packages.])],
 317 [enable_offload_defaulted=$enableval],
 318 [enable_offload_defaulted=])
 319
 320 # Handle --enable-gold, --enable-ld.
 321 # --disable-gold [--enable-ld]
 322 #     Build only ld.  Default option.
 323 # --enable-gold [--enable-ld]
 324 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 325 #     as "ld.bfd" and "ld".
 326 # --enable-gold=default [--enable-ld]
 327 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 328 #     install ld as "ld.bfd".
 329 # --enable-gold[=default] --disable-ld
 330 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 331 # --enable-gold --enable-ld=default
 332 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 333 #     and ld.bfd).
 334 #     In other words, ld is default
 335 # --enable-gold=default --enable-ld=default
 336 #     Error.
 337
 338 default_ld=
 339 AC_ARG_ENABLE(gold,
 340 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 341                 [build gold @<:@ARG={default,yes,no}@:>@])],
 342 ENABLE_GOLD=$enableval,
 343 ENABLE_GOLD=no)
 344 case "${ENABLE_GOLD}" in
 345   yes|default)
 346     # Check for ELF target.
 347     is_elf=no
 348     case "${target}" in
 349       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 350       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 351       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 352       | *-*-solaris2* | *-*-nto* | *-*-nacl* | *-*-haiku*)
 353         case "${target}" in
 354           *-*-linux*aout* | *-*-linux*oldld*)
 355             ;;
 356           *)
 357             is_elf=yes
 358             ;;
 359         esac
 360     esac
 361
 362     if test "$is_elf" = "yes"; then
 363       # Check for target supported by gold.
 364       case "${target}" in
 365         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 366         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-* | loongarch*-*-*)
 367           configdirs="$configdirs gold"
 368           if test x${ENABLE_GOLD} = xdefault; then
 369             default_ld=gold
 370           fi
 371           ENABLE_GOLD=yes
 372           ;;
 373       esac
 374     fi
 375     ;;
 376   no)
 377     ;;
 378   *)
 379     AC_MSG_ERROR([invalid --enable-gold argument])
 380     ;;
 381 esac
 382
 383 AC_ARG_ENABLE(ld,
 384 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 385                 [build ld @<:@ARG={default,yes,no}@:>@])],
 386 ENABLE_LD=$enableval,
 387 ENABLE_LD=yes)
 388
 389 case "${ENABLE_LD}" in
 390   default)
 391     if test x${default_ld} != x; then
 392       AC_MSG_ERROR([either gold or ld can be the default ld])
 393     fi
 394     ;;
 395   yes)
 396     ;;
 397   no)
 398     if test x${ENABLE_GOLD} != xyes; then
 399       AC_MSG_WARN([neither ld nor gold are enabled])
 400     fi
 401     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 402     ;;
 403   *)
 404     AC_MSG_ERROR([invalid --enable-ld argument])
 405     ;;
 406 esac
 407
 408 AC_ARG_ENABLE(gprofng,
 409 [AS_HELP_STRING([[--enable-gprofng[=ARG]]],
 410                 [build gprofng @<:@ARG={yes,no}@:>@])],
 411 enable_gprofng=$enableval,
 412 enable_gprofng=yes)
 413 if test "$enable_gprofng" = "yes"; then
 414   case "${target}" in
 415     x86_64-*-linux* | i?86-*-linux* | aarch64-*-linux*)
 416     configdirs="$configdirs gprofng"
 417     ;;
 418   esac
 419 fi
 420
 421
 422 # PR gas/19109
 423 # Decide the default method for compressing debug sections.
 424 # Provide a configure time option to override our default.
 425 AC_ARG_ENABLE(compressed_debug_sections,
 426 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 427                 [Enable compressed debug sections for gas, gold or ld by
 428                  default])],
 429 [
 430   if test x"$enable_compressed_debug_sections" = xyes; then
 431     AC_MSG_ERROR([no program with compressed debug sections specified])
 432   fi
 433 ], [enable_compressed_debug_sections=])
 434
 435 # Select default compression algorithm.
 436 AC_ARG_ENABLE(default_compressed_debug_sections_algorithm,
 437 [AS_HELP_STRING([--enable-default-compressed-debug-sections-algorithm={zlib,zstd}],
 438                 [Default compression algorithm for --enable-compressed-debug-sections.])],
 439 [], [default_compressed_debug_sections_algorithm=])
 440
 441 # Configure extra directories which are host specific
 442
 443 case "${host}" in
 444   *-cygwin*)
 445     configdirs="$configdirs libtermcap" ;;
 446 esac
 447
 448 # A target can indicate whether a language isn't supported for some reason.
 449 # Only spaces may be used in this macro; not newlines or tabs.
 450 unsupported_languages=
 451
 452 # Remove more programs from consideration, based on the host or
 453 # target this usually means that a port of the program doesn't
 454 # exist yet.
 455
 456 case "${host}" in
 457   i[[3456789]]86-*-msdosdjgpp*)
 458     noconfigdirs="$noconfigdirs tcl tk itcl"
 459     ;;
 460 esac
 461
 462 # Default to --disable-year2038 until we can handle differences between
 463 # projects that use gnulib (which understands year 2038) and projects that
 464 # do not (like BFD).
 465 AC_ARG_ENABLE(year2038,
 466 AS_HELP_STRING([--enable-year2038],
 467   [enable support for timestamps past the year 2038]),
 468 ENABLE_YEAR2038=$enableval,
 469 ENABLE_YEAR2038=no)
 470 enable_year2038=
 471 if test "${ENABLE_YEAR2038}" = "no" ; then
 472   enable_year2038=no
 473 fi
 474
 475 AC_ARG_ENABLE(libquadmath,
 476 AS_HELP_STRING([--disable-libquadmath],
 477   [do not build libquadmath directory]),
 478 ENABLE_LIBQUADMATH=$enableval,
 479 ENABLE_LIBQUADMATH=yes)
 480 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 481   noconfigdirs="$noconfigdirs target-libquadmath"
 482 fi
 483
 484
 485 AC_ARG_ENABLE(libquadmath-support,
 486 AS_HELP_STRING([--disable-libquadmath-support],
 487   [disable libquadmath support for Fortran]),
 488 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 489 ENABLE_LIBQUADMATH_SUPPORT=yes)
 490 enable_libquadmath_support=
 491 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 492   enable_libquadmath_support=no
 493 fi
 494
 495
 496 AC_ARG_ENABLE(libada,
 497 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 498 ENABLE_LIBADA=$enableval,
 499 ENABLE_LIBADA=yes)
 500 if test "${ENABLE_LIBADA}" != "yes" ; then
 501   noconfigdirs="$noconfigdirs gnattools"
 502 fi
 503
 504 AC_ARG_ENABLE(libgm2,
 505 [AS_HELP_STRING([--enable-libgm2], [build libgm2 directory])],
 506 ENABLE_LIBGM2=$enableval,
 507 ENABLE_LIBGM2=no)
 508 if test "${ENABLE_LIBGM2}" != "yes" ; then
 509   noconfigdirs="$noconfigdirs gm2tools"
 510 fi
 511
 512 AC_ARG_ENABLE(libssp,
 513 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 514 ENABLE_LIBSSP=$enableval,
 515 ENABLE_LIBSSP=yes)
 516
 517 AC_ARG_ENABLE(libstdcxx,
 518 AS_HELP_STRING([--disable-libstdcxx],
 519   [do not build libstdc++-v3 directory]),
 520 ENABLE_LIBSTDCXX=$enableval,
 521 ENABLE_LIBSTDCXX=default)
 522 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 523   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 524 fi]
 525
 526 # Enable libgomp by default on hosted POSIX systems, and a few others.
 527 if test x$enable_libgomp = x ; then
 528     case "${target}" in
 529     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 530         ;;
 531     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 532         ;;
 533     *-*-solaris2* | *-*-hpux11*)
 534         ;;
 535     *-*-darwin* | *-*-aix*)
 536         ;;
 537     nvptx*-*-* | amdgcn*-*-*)
 538         ;;
 539     *)
 540         noconfigdirs="$noconfigdirs target-libgomp"
 541         ;;
 542     esac
 543 fi
 544
 545 # Disable libatomic on unsupported systems.
 546 if test -d ${srcdir}/libatomic; then
 547     if test x$enable_libatomic = x; then
 548         AC_MSG_CHECKING([for libatomic support])
 549         if (srcdir=${srcdir}/libatomic; \
 550                 . ${srcdir}/configure.tgt; \
 551                 test -n "$UNSUPPORTED")
 552         then
 553             AC_MSG_RESULT([no])
 554             noconfigdirs="$noconfigdirs target-libatomic"
 555         else
 556             AC_MSG_RESULT([yes])
 557         fi
 558     fi
 559 fi
 560
 561 # Disable libitm on unsupported systems.
 562 if test -d ${srcdir}/libitm; then
 563     if test x$enable_libitm = x; then
 564         AC_MSG_CHECKING([for libitm support])
 565         if (srcdir=${srcdir}/libitm; \
 566                 . ${srcdir}/configure.tgt; \
 567                 test -n "$UNSUPPORTED")
 568         then
 569             AC_MSG_RESULT([no])
 570             noconfigdirs="$noconfigdirs target-libitm"
 571         else
 572             AC_MSG_RESULT([yes])
 573         fi
 574     fi
 575 fi
 576
 577 # Disable libsanitizer on unsupported systems.
 578 if test -d ${srcdir}/libsanitizer; then
 579     if test x$enable_libsanitizer = x; then
 580         AC_MSG_CHECKING([for libsanitizer support])
 581         if (srcdir=${srcdir}/libsanitizer; \
 582                 . ${srcdir}/configure.tgt; \
 583                 test -n "$UNSUPPORTED")
 584         then
 585             AC_MSG_RESULT([no])
 586             noconfigdirs="$noconfigdirs target-libsanitizer"
 587         else
 588             AC_MSG_RESULT([yes])
 589         fi
 590     fi
 591 fi
 592
 593 # Disable libvtv on unsupported systems.
 594 if test -d ${srcdir}/libvtv; then
 595     if test x$enable_libvtv = x; then
 596         AC_MSG_CHECKING([for libvtv support])
 597         if (srcdir=${srcdir}/libvtv; \
 598                 . ${srcdir}/configure.tgt; \
 599                 test "$VTV_SUPPORTED" != "yes")
 600         then
 601             AC_MSG_RESULT([no])
 602             noconfigdirs="$noconfigdirs target-libvtv"
 603         else
 604             AC_MSG_RESULT([yes])
 605         fi
 606     fi
 607 fi
 608
 609 # Disable libquadmath for some systems.
 610 case "${target}" in
 611   avr-*-*)
 612     noconfigdirs="$noconfigdirs target-libquadmath"
 613     ;;
 614   # libquadmath is unused on AIX and libquadmath build process use of
 615   # LD_LIBRARY_PATH can break AIX bootstrap.
 616   powerpc-*-aix* | rs6000-*-aix*)
 617     noconfigdirs="$noconfigdirs target-libquadmath"
 618     ;;
 619 esac
 620
 621 # Disable libssp for some systems.
 622 case "${target}" in
 623   avr-*-*)
 624     # No hosted I/O support.
 625     noconfigdirs="$noconfigdirs target-libssp"
 626     ;;
 627   bpf-*-*)
 628     noconfigdirs="$noconfigdirs target-libssp"
 629     ;;
 630   powerpc-*-aix* | rs6000-*-aix*)
 631     noconfigdirs="$noconfigdirs target-libssp"
 632     ;;
 633   pru-*-*)
 634     # No hosted I/O support.
 635     noconfigdirs="$noconfigdirs target-libssp"
 636     ;;
 637   rl78-*-*)
 638     # libssp uses a misaligned load to trigger a fault, but the RL78
 639     # doesn't fault for those - instead, it gives a build-time error
 640     # for explicit misaligned loads.
 641     noconfigdirs="$noconfigdirs target-libssp"
 642     ;;
 643   visium-*-*)
 644     # No hosted I/O support.
 645     noconfigdirs="$noconfigdirs target-libssp"
 646     ;;
 647 esac
 648
 649 # Disable libstdc++-v3 for some systems.
 650 # Allow user to override this if they pass --enable-libstdcxx
 651 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 652   case "${target}" in
 653     *-*-vxworks*)
 654       # VxWorks uses the Dinkumware C++ library.
 655       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 656       ;;
 657     amdgcn*-*-*)
 658       # Not ported/fails to build when using newlib.
 659       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 660       ;;
 661     arm*-wince-pe*)
 662       # the C++ libraries don't build on top of CE's C libraries
 663       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 664       ;;
 665     avr-*-*)
 666       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 667       ;;
 668     bpf-*-*)
 669       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 670       ;;
 671     ft32-*-*)
 672       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 673       ;;
 674   esac
 675 fi
 676
 677 # Disable C++ on systems where it is known to not work.
 678 # For testing, you can override this with --enable-languages=c++.
 679 case ,${enable_languages}, in
 680   *,c++,*)
 681     ;;
 682   *)
 683       case "${target}" in
 684         bpf-*-*)
 685           unsupported_languages="$unsupported_languages c++"
 686           ;;
 687       esac
 688       ;;
 689 esac
 690
 691 # Disable Objc on systems where it is known to not work.
 692 # For testing, you can override this with --enable-languages=objc.
 693 case ,${enable_languages}, in
 694   *,objc,*)
 695     ;;
 696   *)
 697       case "${target}" in
 698         bpf-*-*)
 699           unsupported_languages="$unsupported_languages objc"
 700           ;;
 701       esac
 702       ;;
 703 esac
 704
 705 # Disable D on systems where it is known to not work.
 706 # For testing, you can override this with --enable-languages=d.
 707 case ,${enable_languages}, in
 708   *,d,*)
 709     ;;
 710   *)
 711     case "${target}" in
 712       bpf-*-*)
 713         unsupported_languages="$unsupported_languages d"
 714         ;;
 715     esac
 716     ;;
 717 esac
 718
 719 # Disable libphobos on unsupported systems.
 720 # For testing, you can override this with --enable-libphobos.
 721 if test -d ${srcdir}/libphobos; then
 722     if test x$enable_libphobos = x; then
 723         AC_MSG_CHECKING([for libphobos support])
 724         if (srcdir=${srcdir}/libphobos; \
 725                 . ${srcdir}/configure.tgt; \
 726                 test "$LIBPHOBOS_SUPPORTED" != "yes")
 727         then
 728             AC_MSG_RESULT([no])
 729             noconfigdirs="$noconfigdirs target-libphobos"
 730         else
 731             AC_MSG_RESULT([yes])
 732         fi
 733     fi
 734 fi
 735
 736 # Disable Fortran for some systems.
 737 case "${target}" in
 738   mmix-*-*)
 739     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 740     unsupported_languages="$unsupported_languages fortran"
 741     ;;
 742   bpf-*-*)
 743     unsupported_languages="$unsupported_languages fortran"
 744     ;;
 745 esac
 746
 747 # Disable libffi for some systems.
 748 case "${target}" in
 749   powerpc-*-darwin*)
 750     ;;
 751   i[[3456789]]86-*-darwin*)
 752     ;;
 753   x86_64-*-darwin[[912]]*)
 754     ;;
 755   *-*-darwin*)
 756     noconfigdirs="$noconfigdirs target-libffi"
 757     ;;
 758   *-*-netware*)
 759     noconfigdirs="$noconfigdirs target-libffi"
 760     ;;
 761   *-*-phoenix*)
 762     noconfigdirs="$noconfigdirs target-libffi"
 763     ;;
 764   *-*-rtems*)
 765     noconfigdirs="$noconfigdirs target-libffi"
 766     ;;
 767   *-*-tpf*)
 768     noconfigdirs="$noconfigdirs target-libffi"
 769     ;;
 770   *-*-uclinux*)
 771     noconfigdirs="$noconfigdirs target-libffi"
 772     ;;
 773   *-*-vxworks*)
 774     noconfigdirs="$noconfigdirs target-libffi"
 775     ;;
 776   aarch64*-*-freebsd*)
 777     noconfigdirs="$noconfigdirs target-libffi"
 778     ;;
 779   alpha*-*-*vms*)
 780     noconfigdirs="$noconfigdirs target-libffi"
 781     ;;
 782   arm*-*-freebsd*)
 783     noconfigdirs="$noconfigdirs target-libffi"
 784     ;;
 785   arm-wince-pe)
 786     noconfigdirs="$noconfigdirs target-libffi"
 787     ;;
 788   arm*-*-symbianelf*)
 789     noconfigdirs="$noconfigdirs target-libffi"
 790     ;;
 791   bpf-*-*)
 792     noconfigdirs="$noconfigdirs target-libffi"
 793     ;;
 794   cris-*-* | crisv32-*-*)
 795     case "${target}" in
 796       *-*-linux*)
 797         ;;
 798       *) # See PR46792 regarding target-libffi.
 799         noconfigdirs="$noconfigdirs target-libffi";;
 800     esac
 801     ;;
 802   hppa*64*-*-hpux*)
 803     noconfigdirs="$noconfigdirs target-libffi"
 804     ;;
 805   hppa*-hp-hpux11*)
 806     ;;
 807   hppa*-*-hpux*)
 808     noconfigdirs="$noconfigdirs target-libffi"
 809     ;;
 810   ia64*-*-*vms*)
 811     noconfigdirs="$noconfigdirs target-libffi"
 812     ;;
 813   i[[3456789]]86-w64-mingw*)
 814     noconfigdirs="$noconfigdirs target-libffi"
 815     ;;
 816   i[[3456789]]86-*-mingw*)
 817     noconfigdirs="$noconfigdirs target-libffi"
 818     ;;
 819   x86_64-*-mingw*)
 820     noconfigdirs="$noconfigdirs target-libffi"
 821     ;;
 822   mmix-*-*)
 823     noconfigdirs="$noconfigdirs target-libffi"
 824     ;;
 825   powerpc-*-aix*)
 826     ;;
 827   rs6000-*-aix*)
 828     ;;
 829   ft32-*-*)
 830     noconfigdirs="$noconfigdirs target-libffi"
 831     ;;
 832   *-*-lynxos*)
 833     noconfigdirs="$noconfigdirs target-libffi"
 834     ;;
 835 esac
 836
 837 # Disable the go frontend on systems where it is known to not work. Please keep
 838 # this in sync with contrib/config-list.mk.
 839 case "${target}" in
 840 *-*-darwin* | *-*-cygwin* | *-*-mingw* | bpf-* )
 841     unsupported_languages="$unsupported_languages go"
 842     ;;
 843 esac
 844
 845 # Only allow gdbserver on some systems.
 846 if test -d ${srcdir}/gdbserver; then
 847     if test x$enable_gdbserver = x; then
 848         AC_MSG_CHECKING([for gdbserver support])
 849         if (srcdir=${srcdir}/gdbserver; \
 850                 . ${srcdir}/configure.srv; \
 851                 test -n "$UNSUPPORTED")
 852         then
 853             AC_MSG_RESULT([no])
 854             noconfigdirs="$noconfigdirs gdbserver"
 855         else
 856             AC_MSG_RESULT([yes])
 857         fi
 858     fi
 859 fi
 860
 861 # Disable libgo for some systems where it is known to not work.
 862 # For testing, you can easily override this with --enable-libgo.
 863 if test x$enable_libgo = x; then
 864     case "${target}" in
 865     *-*-darwin*)
 866         # PR 46986
 867         noconfigdirs="$noconfigdirs target-libgo"
 868         ;;
 869     *-*-cygwin* | *-*-mingw*)
 870         noconfigdirs="$noconfigdirs target-libgo"
 871         ;;
 872     bpf-*-*)
 873         noconfigdirs="$noconfigdirs target-libgo"
 874         ;;
 875     esac
 876 fi
 877
 878 # Default libgloss CPU subdirectory.
 879 libgloss_dir="$target_cpu"
 880
 881 case "${target}" in
 882   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 883     libgloss_dir=wince
 884     ;;
 885   aarch64*-*-* )
 886     libgloss_dir=aarch64
 887     ;;
 888   arm*-*-*)
 889     libgloss_dir=arm
 890     ;;
 891   cris-*-* | crisv32-*-*)
 892     libgloss_dir=cris
 893     ;;
 894   kvx-*-elf)
 895     libgloss_dir=kvx-elf
 896     ;;
 897   kvx-*-mbr)
 898     libgloss_dir=kvx-mbr
 899     ;;
 900   kvx-*-cos)
 901     libgloss_dir=kvx-cos
 902     ;;
 903   hppa*-*-*)
 904     libgloss_dir=pa
 905     ;;
 906   i[[3456789]]86-*-*)
 907     libgloss_dir=i386
 908     ;;
 909   loongarch*-*-*)
 910     libgloss_dir=loongarch
 911     ;;
 912   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 913     libgloss_dir=m68hc11
 914     ;;
 915   m68*-*-* | fido-*-*)
 916     libgloss_dir=m68k
 917     ;;
 918   mips*-*-*)
 919     libgloss_dir=mips
 920     ;;
 921   powerpc*-*-*)
 922     libgloss_dir=rs6000
 923     ;;
 924   pru-*-*)
 925     libgloss_dir=pru
 926     ;;
 927   sparc*-*-*)
 928     libgloss_dir=sparc
 929     ;;
 930 esac
 931
 932 # Disable newlib and libgloss for various target OSes.
 933 case "${target}" in
 934   alpha*-dec-osf*)
 935     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 936     ;;
 937   i[[3456789]]86-*-linux*)
 938     # This section makes it possible to build newlib natively on linux.
 939     # If we are using a cross compiler then don't configure newlib.
 940     if test x${is_cross_compiler} != xno ; then
 941       noconfigdirs="$noconfigdirs target-newlib"
 942     fi
 943     noconfigdirs="$noconfigdirs target-libgloss"
 944     # If we are not using a cross compiler, do configure newlib.
 945     # Note however, that newlib will only be configured in this situation
 946     # if the --with-newlib option has been given, because otherwise
 947     # 'target-newlib' will appear in skipdirs.
 948     ;;
 949   i[[3456789]]86-*-rdos*)
 950     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 951     ;;
 952   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 953     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 954     ;;
 955   sparc-*-sunos4*)
 956     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 957     ;;
 958   bpf-*-*)
 959     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 960     ;;
 961   *-*-aix*)
 962     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 963     ;;
 964   *-*-beos*)
 965     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 966     ;;
 967   *-*-chorusos)
 968     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 969     ;;
 970   *-*-dragonfly*)
 971     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 972     ;;
 973   *-*-freebsd*)
 974     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 975     ;;
 976   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 977     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 978     ;;
 979   *-*-lynxos*)
 980     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 981     ;;
 982   *-*-mingw*)
 983     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 984     ;;
 985   *-*-netbsd*)
 986     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 987     ;;
 988   *-*-netware*)
 989     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 990     ;;
 991   *-*-tpf*)
 992     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 993     ;;
 994   *-*-uclinux*)
 995     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 996     ;;
 997   *-*-vxworks*)
 998     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 999     ;;
1000 esac
1001
1002 case "${target}" in
1003   *-*-chorusos)
1004     ;;
1005   aarch64-*-darwin*)
1006     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1007     noconfigdirs="$noconfigdirs sim target-rda"
1008     ;;
1009   amdgcn*-*-*)
1010     ;;
1011   arm-*-darwin*)
1012     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1013     noconfigdirs="$noconfigdirs sim target-rda"
1014     ;;
1015   powerpc-*-darwin*)
1016     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1017     noconfigdirs="$noconfigdirs sim target-rda"
1018     ;;
1019   i[[3456789]]86-*-darwin*)
1020     noconfigdirs="$noconfigdirs ld gprof"
1021     noconfigdirs="$noconfigdirs sim target-rda"
1022     ;;
1023   x86_64-*-darwin[[912]]*)
1024     noconfigdirs="$noconfigdirs ld gas gprof"
1025     noconfigdirs="$noconfigdirs sim target-rda"
1026     ;;
1027   *-*-darwin*)
1028     noconfigdirs="$noconfigdirs ld gas gdb gprof"
1029     noconfigdirs="$noconfigdirs sim target-rda"
1030     ;;
1031   *-*-dragonfly*)
1032     ;;
1033   *-*-freebsd*)
1034     if test "x$with_gmp" = x \
1035         && ! test -d ${srcdir}/gmp \
1036         && test -f /usr/local/include/gmp.h; then
1037       with_gmp=/usr/local
1038     fi
1039     ;;
1040   *-*-kaos*)
1041     # Remove unsupported stuff on all kaOS configurations.
1042     noconfigdirs="$noconfigdirs target-libgloss"
1043     ;;
1044   *-*-netbsd*)
1045     ;;
1046   *-*-netware*)
1047     ;;
1048   *-*-phoenix*)
1049     noconfigdirs="$noconfigdirs target-libgloss"
1050     ;;
1051   *-*-rtems*)
1052     noconfigdirs="$noconfigdirs target-libgloss"
1053     ;;
1054     # The tpf target doesn't support gdb yet.
1055   *-*-tpf*)
1056     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
1057     ;;
1058   *-*-uclinux*)
1059     noconfigdirs="$noconfigdirs target-rda"
1060     ;;
1061   *-*-vxworks*)
1062     ;;
1063   alpha*-dec-osf*)
1064     # ld works, but does not support shared libraries.
1065     # gas doesn't generate exception information.
1066     noconfigdirs="$noconfigdirs gas ld"
1067     ;;
1068   alpha*-*-*vms*)
1069     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1070     ;;
1071   alpha*-*-*)
1072     # newlib is not 64 bit ready
1073     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1074     ;;
1075   bpf-*-*)
1076     noconfigdirs="$noconfigdirs target-libobjc target-libbacktrace"
1077     ;;
1078   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1079     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1080     ;;
1081   arc*-*-*)
1082     noconfigdirs="$noconfigdirs sim"
1083     ;;
1084   arm-*-pe*)
1085     noconfigdirs="$noconfigdirs target-libgloss"
1086     ;;
1087   arm-*-riscix*)
1088     noconfigdirs="$noconfigdirs ld target-libgloss"
1089     ;;
1090   avr-*-*)
1091     if test x${with_avrlibc} != xno; then
1092       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1093     fi
1094     ;;
1095   c4x-*-* | tic4x-*-*)
1096     noconfigdirs="$noconfigdirs target-libgloss"
1097     ;;
1098   tic54x-*-*)
1099     noconfigdirs="$noconfigdirs target-libgloss gdb"
1100     ;;
1101   d10v-*-*)
1102     noconfigdirs="$noconfigdirs target-libgloss"
1103     ;;
1104   d30v-*-*)
1105     noconfigdirs="$noconfigdirs gdb"
1106     ;;
1107   fr30-*-elf*)
1108     noconfigdirs="$noconfigdirs gdb"
1109     ;;
1110   ft32-*-*)
1111     noconfigdirs="$noconfigdirs target-rda gprof"
1112     ;;
1113   moxie-*-*)
1114     noconfigdirs="$noconfigdirs"
1115     ;;
1116   h8300*-*-*)
1117     noconfigdirs="$noconfigdirs target-libgloss"
1118     ;;
1119   h8500-*-*)
1120     noconfigdirs="$noconfigdirs target-libgloss"
1121     ;;
1122   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1123     ;;
1124   hppa*64*-*-hpux*)
1125     noconfigdirs="$noconfigdirs gdb"
1126     ;;
1127   hppa*-*-hpux11*)
1128     noconfigdirs="$noconfigdirs gdb ld"
1129     ;;
1130   hppa*64*-*-linux*)
1131     ;;
1132   hppa*-*-linux*)
1133     ;;
1134   hppa*-*-*elf* | \
1135   hppa*-*-lites* | \
1136   hppa*-*-openbsd* | \
1137   hppa*64*-*-*)
1138     ;;
1139   hppa*-*-pro*)
1140     ;;
1141   hppa*-*-*)
1142     noconfigdirs="$noconfigdirs ld"
1143     ;;
1144   i960-*-*)
1145     noconfigdirs="$noconfigdirs gdb"
1146     ;;
1147   ia64*-*-elf*)
1148     # No gdb support yet.
1149     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1150     ;;
1151   ia64*-**-hpux*)
1152     # No ld support yet.
1153     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1154     ;;
1155   ia64*-*-*vms*)
1156     # No ld support yet.
1157     noconfigdirs="$noconfigdirs libgui itcl ld"
1158     ;;
1159   i[[3456789]]86-w64-mingw*)
1160     ;;
1161   i[[3456789]]86-*-mingw*)
1162     target_configdirs="$target_configdirs target-winsup"
1163     ;;
1164   *-*-cygwin*)
1165     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1166     noconfigdirs="$noconfigdirs target-libgloss"
1167     # always build newlib if winsup directory is present.
1168     if test -d "$srcdir/winsup/cygwin"; then
1169       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1170     elif test -d "$srcdir/newlib"; then
1171       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1172     fi
1173     ;;
1174   i[[3456789]]86-*-pe)
1175     noconfigdirs="$noconfigdirs target-libgloss"
1176     ;;
1177   i[[3456789]]86-*-sco3.2v5*)
1178     # The linker does not yet know about weak symbols in COFF,
1179     # and is not configured to handle mixed ELF and COFF.
1180     noconfigdirs="$noconfigdirs ld target-libgloss"
1181     ;;
1182   i[[3456789]]86-*-sco*)
1183     noconfigdirs="$noconfigdirs gprof target-libgloss"
1184     ;;
1185   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1186     noconfigdirs="$noconfigdirs target-libgloss"
1187     ;;
1188   i[[3456789]]86-*-sysv4*)
1189     noconfigdirs="$noconfigdirs target-libgloss"
1190     ;;
1191   i[[3456789]]86-*-beos*)
1192     noconfigdirs="$noconfigdirs gdb"
1193     ;;
1194   i[[3456789]]86-*-rdos*)
1195     noconfigdirs="$noconfigdirs gdb"
1196     ;;
1197   kvx-*-*)
1198     noconfigdirs="$noconfigdirs gdb gdbserver sim"
1199     ;;
1200   mmix-*-*)
1201     noconfigdirs="$noconfigdirs gdb"
1202     ;;
1203   mt-*-*)
1204     noconfigdirs="$noconfigdirs sim"
1205     ;;
1206   nfp-*-*)
1207     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1208     noconfigdirs="$noconfigdirs $target_libraries"
1209     ;;
1210   pdp11-*-*)
1211     noconfigdirs="$noconfigdirs gdb gprof"
1212     ;;
1213   powerpc-*-aix*)
1214     # copied from rs6000-*-* entry
1215     noconfigdirs="$noconfigdirs gprof"
1216     ;;
1217   powerpc*-*-winnt* | powerpc*-*-pe*)
1218     target_configdirs="$target_configdirs target-winsup"
1219     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1220     # always build newlib.
1221     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1222     ;;
1223     # This is temporary until we can link against shared libraries
1224   powerpcle-*-solaris*)
1225     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1226     ;;
1227   powerpc-*-beos*)
1228     noconfigdirs="$noconfigdirs gdb"
1229     ;;
1230   rs6000-*-lynxos*)
1231     noconfigdirs="$noconfigdirs gprof"
1232     ;;
1233   rs6000-*-aix*)
1234     noconfigdirs="$noconfigdirs gprof"
1235     ;;
1236   rs6000-*-*)
1237     noconfigdirs="$noconfigdirs gprof"
1238     ;;
1239   m68k-apollo-*)
1240     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1241     ;;
1242   microblaze*)
1243     noconfigdirs="$noconfigdirs gprof"
1244     ;;
1245   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1246     if test x$with_newlib = xyes; then
1247       noconfigdirs="$noconfigdirs gprof"
1248     fi
1249     ;;
1250   mips*-*-irix5*)
1251     noconfigdirs="$noconfigdirs gprof target-libgloss"
1252     ;;
1253   mips*-*-irix6*)
1254     noconfigdirs="$noconfigdirs gprof target-libgloss"
1255     ;;
1256   mips*-*-bsd*)
1257     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1258     ;;
1259   mips*-*-linux*)
1260     ;;
1261   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1262   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1263     noconfigdirs="$noconfigdirs ld gas gprof"
1264     ;;
1265   mips*-*-*)
1266     noconfigdirs="$noconfigdirs gprof"
1267     ;;
1268   nvptx*-*-*)
1269     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1270     ;;
1271   sh-*-*)
1272     case "${target}" in
1273       sh*-*-elf)
1274          ;;
1275       *)
1276          noconfigdirs="$noconfigdirs target-libgloss" ;;
1277     esac
1278     ;;
1279   sparc-*-sunos4*)
1280     if test x${is_cross_compiler} = xno ; then
1281            use_gnu_ld=no
1282     fi
1283     ;;
1284   tic6x-*-*)
1285     noconfigdirs="$noconfigdirs sim"
1286     ;;
1287   tilepro*-*-* | tilegx*-*-*)
1288     noconfigdirs="$noconfigdirs sim"
1289     ;;
1290   v810-*-*)
1291     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1292     ;;
1293   vax-*-*)
1294     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1295     ;;
1296   wasm32-*-*)
1297     noconfigdirs="$noconfigdirs ld"
1298     ;;
1299   loongarch*-*-linux*)
1300     ;;
1301   loongarch*-*-*)
1302     noconfigdirs="$noconfigdirs gprof"
1303     ;;
1304 esac
1305
1306 # If we aren't building newlib, then don't build libgloss, since libgloss
1307 # depends upon some newlib header files.
1308 case "${noconfigdirs}" in
1309   *target-libgloss*) ;;
1310   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1311 esac
1312
1313 # Work in distributions that contain no compiler tools, like Autoconf.
1314 host_makefile_frag=/dev/null
1315 if test -d ${srcdir}/config ; then
1316 case "${host}" in
1317   i[[3456789]]86-*-msdosdjgpp*)
1318     host_makefile_frag="config/mh-djgpp"
1319     ;;
1320   *-cygwin*)
1321     ACX_CHECK_CYGWIN_CAT_WORKS
1322     host_makefile_frag="config/mh-cygwin"
1323     ;;
1324   *-mingw*)
1325     host_makefile_frag="config/mh-mingw"
1326     ;;
1327   alpha*-linux*)
1328     host_makefile_frag="config/mh-alpha-linux"
1329     ;;
1330   hppa*-hp-hpux*)
1331     host_makefile_frag="config/mh-pa"
1332     ;;
1333   hppa*-*)
1334     host_makefile_frag="config/mh-pa"
1335     ;;
1336   i?86-*-darwin[[89]]* | i?86-*-darwin1[[0-7]]* | powerpc*-*-darwin*)
1337     host_makefile_frag="config/mh-darwin"
1338     ;;
1339   powerpc-*-aix*)
1340     host_makefile_frag="config/mh-ppc-aix"
1341     ;;
1342   rs6000-*-aix*)
1343     host_makefile_frag="config/mh-ppc-aix"
1344     ;;
1345 esac
1346 fi
1347
1348 if test "${build}" != "${host}" ; then
1349   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1350   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1351   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1352   CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CC_FOR_BUILD) -E}"
1353   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1354   DSYMUTIL_FOR_BUILD=${DSYMUTIL_FOR_BUILD-dsymutil}
1355   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1356   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1357   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1358   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1359   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1360   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1361   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1362   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1363   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1364 else
1365   AR_FOR_BUILD="\$(AR)"
1366   AS_FOR_BUILD="\$(AS)"
1367   CC_FOR_BUILD="\$(CC)"
1368   CXX_FOR_BUILD="\$(CXX)"
1369   DSYMUTIL_FOR_BUILD="\$(DSYMUTIL)"
1370   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1371   GOC_FOR_BUILD="\$(GOC)"
1372   GDC_FOR_BUILD="\$(GDC)"
1373   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1374   LD_FOR_BUILD="\$(LD)"
1375   NM_FOR_BUILD="\$(NM)"
1376   RANLIB_FOR_BUILD="\$(RANLIB)"
1377   WINDRES_FOR_BUILD="\$(WINDRES)"
1378   WINDMC_FOR_BUILD="\$(WINDMC)"
1379 fi
1380
1381 AC_PROG_CC_C99
1382 AC_PROG_CXX
1383
1384 # We must set the default linker to the linker used by gcc for the correct
1385 # operation of libtool.  If LD is not defined and we are using gcc, try to
1386 # set the LD default to the ld used by gcc.
1387 if test -z "$LD"; then
1388   if test "$GCC" = yes; then
1389     case $build in
1390     *-*-mingw*)
1391       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1392     *)
1393       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1394     esac
1395     case $gcc_prog_ld in
1396     # Accept absolute paths.
1397     [[\\/]* | [A-Za-z]:[\\/]*)]
1398       LD="$gcc_prog_ld" ;;
1399     esac
1400   fi
1401 fi
1402
1403 # Check whether -static-libstdc++ -static-libgcc is supported.
1404 have_static_libs=no
1405 if test "$GCC" = yes; then
1406   saved_LDFLAGS="$LDFLAGS"
1407
1408   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1409   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1410   AC_LANG_PUSH(C++)
1411   AC_LINK_IFELSE([AC_LANG_SOURCE([
1412 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1413 #error -static-libstdc++ not implemented
1414 #endif
1415 int main() {}])],
1416     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1417     [AC_MSG_RESULT([no])])
1418   AC_LANG_POP(C++)
1419
1420   LDFLAGS="$saved_LDFLAGS"
1421 fi
1422
1423 ACX_PROG_GNAT
1424 ACX_PROG_GDC
1425 ACX_PROG_CMP_IGNORE_INITIAL
1426
1427 AC_ARG_ENABLE([bootstrap],
1428 [AS_HELP_STRING([--enable-bootstrap],
1429                 [enable bootstrapping @<:@yes if native build@:>@])],,
1430 enable_bootstrap=default)
1431
1432 # Issue errors and warnings for invalid/strange bootstrap combinations.
1433 if test -r $srcdir/gcc/configure; then
1434   have_compiler=yes
1435 else
1436   have_compiler=no
1437 fi
1438
1439 case "$have_compiler:$host:$target:$enable_bootstrap" in
1440   *:*:*:no) ;;
1441
1442   # Default behavior.  Enable bootstrap if we have a compiler
1443   # and we are in a native configuration.
1444   yes:$build:$build:default)
1445     enable_bootstrap=yes ;;
1446
1447   *:*:*:default)
1448     enable_bootstrap=no ;;
1449
1450   # We have a compiler and we are in a native configuration, bootstrap is ok
1451   yes:$build:$build:yes)
1452     ;;
1453
1454   # Other configurations, but we have a compiler.  Assume the user knows
1455   # what he's doing.
1456   yes:*:*:yes)
1457     AC_MSG_WARN([trying to bootstrap a cross compiler])
1458     ;;
1459
1460   # No compiler: if they passed --enable-bootstrap explicitly, fail
1461   no:*:*:yes)
1462     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1463
1464   # Fail if wrong command line
1465   *)
1466     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1467     ;;
1468 esac
1469
1470 # When bootstrapping with GCC, build stage 1 in C++11 mode to ensure that a
1471 # C++11 compiler can still start the bootstrap.  Otherwise, if building GCC,
1472 # require C++11 (or higher).
1473 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1474   CXX="$CXX -std=c++11"
1475 elif test "$have_compiler" = yes; then
1476   AX_CXX_COMPILE_STDCXX(11)
1477
1478   if test "${build}" != "${host}"; then
1479     AX_CXX_COMPILE_STDCXX(11, [], [], [_FOR_BUILD])
1480   fi
1481 fi
1482
1483 AC_ARG_ENABLE([pgo-build],
1484 [AS_HELP_STRING([--enable-pgo-build[[=lto]]],
1485                 [enable the PGO build])],
1486 [enable_pgo_build=$enableval],
1487 [enable_pgo_build=no])
1488
1489 # Issue errors and warnings for invalid/strange PGO build combinations.
1490 case "$have_compiler:$host:$target:$enable_pgo_build" in
1491   *:*:*:no) ;;
1492
1493   # Allow the PGO build only if we aren't building a compiler and
1494   # we are in a native configuration.
1495   no:$build:$build:yes | no:$build:$build:lto) ;;
1496
1497   # Disallow the PGO bootstrap if we are building a compiler.
1498   yes:*:*:yes | yes:*:*:lto)
1499     AC_MSG_ERROR([cannot perform the PGO bootstrap when building a compiler]) ;;
1500
1501   *)
1502     AC_MSG_ERROR([invalid option for --enable-pgo-build])
1503     ;;
1504 esac
1505
1506 if test "$enable_pgo_build" != "no"; then
1507   AC_MSG_CHECKING([whether the compiler supports -fprofile-generate])
1508   old_CFLAGS="$CFLAGS"
1509   PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
1510   CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
1511   AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1512                     [PGO_BUILD_GEN_CFLAGS=])
1513   CFLAGS="$old_CFLAGS"
1514   if test -n "$PGO_BUILD_GEN_CFLAGS"; then
1515     AC_MSG_RESULT([yes])
1516     PGO_BUILD_USE_CFLAGS="-fprofile-use"
1517   else
1518     AC_MSG_RESULT([no])
1519     AC_MSG_ERROR([cannot perform the PGO build without -fprofile-generate])
1520   fi
1521
1522   if test "$enable_pgo_build" = "lto"; then
1523     AC_MSG_CHECKING([whether the compiler supports -flto=jobserver -ffat-lto-objects])
1524     old_CFLAGS="$CFLAGS"
1525     PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
1526     CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
1527     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1528                       [PGO_BUILD_LTO_CFLAGS=])
1529     CFLAGS="$old_CFLAGS"
1530     if test -n "$PGO_BUILD_LTO_CFLAGS"; then
1531       AC_MSG_RESULT([yes])
1532     else
1533       AC_MSG_RESULT([no])
1534       AC_MSG_WARN([LTO is disabled for the PGO build])
1535     fi
1536   fi
1537 fi
1538 AC_SUBST(PGO_BUILD_GEN_CFLAGS)
1539 AC_SUBST(PGO_BUILD_USE_CFLAGS)
1540 AC_SUBST(PGO_BUILD_LTO_CFLAGS)
1541
1542 # Used for setting $lt_cv_objdir
1543 _LT_CHECK_OBJDIR
1544
1545 # Check for GMP, MPFR and MPC
1546 require_gmp=no
1547 require_mpc=no
1548 if test -d ${srcdir}/gcc ; then
1549   require_gmp=yes
1550   require_mpc=yes
1551 fi
1552 if test -d ${srcdir}/gdb ; then
1553   if test "x$enable_gdb" != xno; then
1554    require_gmp=yes
1555   fi
1556 fi
1557
1558 gmplibs="-lmpfr -lgmp"
1559 if test x"$require_mpc" = "xyes" ; then
1560   gmplibs="-lmpc $gmplibs"
1561 fi
1562 gmpinc=
1563 have_gmp=no
1564
1565 # Specify a location for mpc
1566 # check for this first so it ends up on the link line before mpfr.
1567 AC_ARG_WITH(mpc,
1568 [AS_HELP_STRING([--with-mpc=PATH],
1569                 [specify prefix directory for installed MPC package.
1570                  Equivalent to --with-mpc-include=PATH/include
1571                  plus --with-mpc-lib=PATH/lib])])
1572 AC_ARG_WITH(mpc-include,
1573 [AS_HELP_STRING([--with-mpc-include=PATH],
1574                 [specify directory for installed MPC include files])])
1575 AC_ARG_WITH(mpc-lib,
1576 [AS_HELP_STRING([--with-mpc-lib=PATH],
1577                 [specify directory for the installed MPC library])])
1578
1579 if test "x$with_mpc" != x; then
1580   gmplibs="-L$with_mpc/lib $gmplibs"
1581   gmpinc="-I$with_mpc/include $gmpinc"
1582 fi
1583 if test "x$with_mpc_include" != x; then
1584   gmpinc="-I$with_mpc_include $gmpinc"
1585 fi
1586 if test "x$with_mpc_lib" != x; then
1587   gmplibs="-L$with_mpc_lib $gmplibs"
1588 fi
1589 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1590   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1591   gmpinc='-I$$s/mpc/src '"$gmpinc"
1592   # Do not test the mpc version.  Assume that it is sufficient, since
1593   # it is in the source tree, and the library has not been built yet
1594   # but it would be included on the link line in the version check below
1595   # hence making the test fail.
1596   have_gmp=yes
1597 fi
1598
1599 # Specify a location for mpfr
1600 # check for this first so it ends up on the link line before gmp.
1601 AC_ARG_WITH(mpfr,
1602 [AS_HELP_STRING([--with-mpfr=PATH],
1603                 [specify prefix directory for installed MPFR package.
1604                  Equivalent to --with-mpfr-include=PATH/include
1605                  plus --with-mpfr-lib=PATH/lib])])
1606 AC_ARG_WITH(mpfr-include,
1607 [AS_HELP_STRING([--with-mpfr-include=PATH],
1608                 [specify directory for installed MPFR include files])])
1609 AC_ARG_WITH(mpfr-lib,
1610 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1611                 [specify directory for the installed MPFR library])])
1612
1613 if test "x$with_mpfr" != x; then
1614   gmplibs="-L$with_mpfr/lib $gmplibs"
1615   gmpinc="-I$with_mpfr/include $gmpinc"
1616 fi
1617 if test "x$with_mpfr_include" != x; then
1618   gmpinc="-I$with_mpfr_include $gmpinc"
1619 fi
1620 if test "x$with_mpfr_lib" != x; then
1621   gmplibs="-L$with_mpfr_lib $gmplibs"
1622 fi
1623 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1624   # MPFR v3.1.0 moved the sources into a src sub-directory.
1625   if ! test -d ${srcdir}/mpfr/src; then
1626     AC_MSG_ERROR([dnl
1627 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1628   fi
1629   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1630   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1631   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1632   # Do not test the mpfr version.  Assume that it is sufficient, since
1633   # it is in the source tree, and the library has not been built yet
1634   # but it would be included on the link line in the version check below
1635   # hence making the test fail.
1636   have_gmp=yes
1637 fi
1638
1639 # Specify a location for gmp
1640 AC_ARG_WITH(gmp,
1641 [AS_HELP_STRING([--with-gmp=PATH],
1642                 [specify prefix directory for the installed GMP package.
1643                  Equivalent to --with-gmp-include=PATH/include
1644                  plus --with-gmp-lib=PATH/lib])])
1645 AC_ARG_WITH(gmp-include,
1646 [AS_HELP_STRING([--with-gmp-include=PATH],
1647                 [specify directory for installed GMP include files])])
1648 AC_ARG_WITH(gmp-lib,
1649 [AS_HELP_STRING([--with-gmp-lib=PATH],
1650                 [specify directory for the installed GMP library])])
1651
1652
1653 if test "x$with_gmp" != x; then
1654   gmplibs="-L$with_gmp/lib $gmplibs"
1655   gmpinc="-I$with_gmp/include $gmpinc"
1656 fi
1657 if test "x$with_gmp_include" != x; then
1658   gmpinc="-I$with_gmp_include $gmpinc"
1659 fi
1660 if test "x$with_gmp_lib" != x; then
1661   gmplibs="-L$with_gmp_lib $gmplibs"
1662 fi
1663 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1664   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1665   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1666   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1667   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1668   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1669   # Do not test the gmp version.  Assume that it is sufficient, since
1670   # it is in the source tree, and the library has not been built yet
1671   # but it would be included on the link line in the version check below
1672   # hence making the test fail.
1673   have_gmp=yes
1674 fi
1675
1676 if test "x$require_gmp" = xyes && test "x$have_gmp" = xno; then
1677   have_gmp=yes
1678   saved_CFLAGS="$CFLAGS"
1679   CFLAGS="$CFLAGS $gmpinc"
1680   # Check for the recommended and required versions of GMP.
1681   AC_MSG_CHECKING([for the correct version of gmp.h])
1682   AC_TRY_COMPILE([#include "gmp.h"],[
1683   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1684   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1685   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1686   choke me
1687   #endif
1688   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1689   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1690   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1691   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1692   choke me
1693   #endif
1694   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1695    [AC_MSG_RESULT([no]); have_gmp=no])
1696
1697   # If we have GMP, check the MPFR version.
1698   if test x"$have_gmp" = xyes; then
1699     # Check for the recommended and required versions of MPFR.
1700     AC_MSG_CHECKING([for the correct version of mpfr.h])
1701     AC_TRY_COMPILE([#include <gmp.h>
1702     #include <mpfr.h>],[
1703     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,0)
1704     choke me
1705     #endif
1706     ], [AC_TRY_COMPILE([#include <gmp.h>
1707     #include <mpfr.h>],[
1708     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,6)
1709     choke me
1710     #endif
1711     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1712      [AC_MSG_RESULT([no]); have_gmp=no])
1713   fi
1714
1715   # Check for the MPC header version.
1716   if test "x$require_mpc" = xyes && test x"$have_gmp" = xyes ; then
1717     # Check for the recommended and required versions of MPC.
1718     AC_MSG_CHECKING([for the correct version of mpc.h])
1719     AC_TRY_COMPILE([#include <mpc.h>],[
1720     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1721     choke me
1722     #endif
1723     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1724     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1725     choke me
1726     #endif
1727     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1728      [AC_MSG_RESULT([no]); have_gmp=no])
1729   fi
1730
1731   # Now check the MPFR library.
1732   if test x"$have_gmp" = xyes; then
1733     saved_LIBS="$LIBS"
1734     LIBS="$LIBS $gmplibs"
1735     AC_MSG_CHECKING([for the correct version of the gmp/mpfr libraries])
1736     AC_TRY_LINK([#include <mpfr.h>],[
1737     mpfr_t n;
1738     mpfr_t x;
1739     int t;
1740     mpfr_init (n);
1741     mpfr_init (x);
1742     mpfr_atan2 (n, n, x, MPFR_RNDN);
1743     mpfr_erfc (n, x, MPFR_RNDN);
1744     mpfr_subnormalize (x, t, MPFR_RNDN);
1745     mpfr_clear(n);
1746     mpfr_clear(x);
1747     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1748     LIBS="$saved_LIBS"
1749   fi
1750
1751   # Now check the MPC library
1752   if test "x$require_mpc" = xyes && test x"$have_gmp" = xyes; then
1753     saved_LIBS="$LIBS"
1754     LIBS="$LIBS $gmplibs"
1755     AC_MSG_CHECKING([for the correct version of the mpc libraries])
1756     AC_TRY_LINK([#include <mpc.h>],[
1757     mpc_t c;
1758     mpc_init2 (c, 53);
1759     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1760     mpc_cosh (c, c, MPC_RNDNN);
1761     mpc_pow (c, c, c, MPC_RNDNN);
1762     mpc_acosh (c, c, MPC_RNDNN);
1763     mpc_clear (c);
1764     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1765     LIBS="$saved_LIBS"
1766   fi
1767
1768   CFLAGS="$saved_CFLAGS"
1769
1770 # The library versions listed in the error message below should match
1771 # the HARD-minimums enforced above.
1772   if test x$have_gmp != xyes; then
1773     if test -d ${srcdir}/gcc ; then
1774       AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 3.1.0+ and MPC 0.8.0+.
1775 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1776 their locations.  Source code for these libraries can be found at
1777 their respective hosting sites as well as at
1778 https://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1779 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1780 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1781 make sure that you have installed both the libraries and the header
1782 files.  They may be located in separate packages.])
1783     else
1784       AC_MSG_ERROR([Building GDB requires GMP 4.2+, and MPFR 3.1.0+.
1785 Try the --with-gmp and/or --with-mpfr options to specify
1786 their locations.  If you obtained GMP and/or MPFR from a vendor
1787 distribution package, make sure that you have installed both the libraries
1788 and the header files.  They may be located in separate packages.])
1789     fi
1790   fi
1791 fi
1792
1793 # Flags needed for both GMP, MPFR and/or MPC.
1794 AC_SUBST(gmplibs)
1795 AC_SUBST(gmpinc)
1796 AC_SUBST(extra_mpfr_configure_flags)
1797 AC_SUBST(extra_mpc_gmp_configure_flags)
1798 AC_SUBST(extra_mpc_mpfr_configure_flags)
1799 AC_SUBST(extra_isl_gmp_configure_flags)
1800
1801 # Libraries to use for stage1 or when not bootstrapping.
1802 AC_ARG_WITH(stage1-libs,
1803 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1804 [if test "$withval" = "no" -o "$withval" = "yes"; then
1805    stage1_libs=
1806  else
1807    stage1_libs=$withval
1808  fi],
1809 [stage1_libs=])
1810 AC_SUBST(stage1_libs)
1811
1812 # Whether or not to use -static-libstdc++ and -static-libgcc.  The
1813 # default is yes if gcc is being built; no otherwise.  The reason for
1814 # this default is that gdb is sometimes linked against GNU Source
1815 # Highlight, which is a shared library that uses C++ exceptions.  In
1816 # this case, -static-libstdc++ will cause crashes.
1817 AC_ARG_WITH(static-standard-libraries,
1818 [AS_HELP_STRING([--with-static-standard-libraries],
1819                 [use -static-libstdc++ and -static-libgcc (default=auto)])],
1820 [], [with_static_standard_libraries=auto])
1821 if test "$with_static_standard_libraries" = auto; then
1822   with_static_standard_libraries=$have_compiler
1823 fi
1824
1825 # Linker flags to use for stage1 or when not bootstrapping.
1826 AC_ARG_WITH(stage1-ldflags,
1827 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1828 [if test "$withval" = "no" -o "$withval" = "yes"; then
1829    stage1_ldflags=
1830  else
1831    stage1_ldflags=$withval
1832  fi],
1833 [stage1_ldflags=
1834  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1835  # if supported.  But if the user explicitly specified the libraries to use,
1836  # trust that they are doing what they want.
1837  if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
1838      -a "$have_static_libs" = yes; then
1839    stage1_ldflags="-static-libstdc++ -static-libgcc"
1840  fi])
1841 AC_SUBST(stage1_ldflags)
1842
1843 # Libraries to use for stage2 and later builds.
1844 AC_ARG_WITH(boot-libs,
1845 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1846 [if test "$withval" = "no" -o "$withval" = "yes"; then
1847    poststage1_libs=
1848  else
1849    poststage1_libs=$withval
1850  fi],
1851 [poststage1_libs=])
1852 AC_SUBST(poststage1_libs)
1853
1854 # Linker flags to use for stage2 and later builds.
1855 AC_ARG_WITH(boot-ldflags,
1856 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1857                 [linker flags for stage2 and later])],
1858 [if test "$withval" = "no" -o "$withval" = "yes"; then
1859    poststage1_ldflags=
1860  else
1861    poststage1_ldflags=$withval
1862  fi],
1863 [poststage1_ldflags=
1864  # In stages 2 and 3, default to linking libstdc++ and libgcc
1865  # statically.  But if the user explicitly specified the libraries to
1866  # use, trust that they are doing what they want.
1867  if test "$poststage1_libs" = ""; then
1868    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1869  fi])
1870 AC_SUBST(poststage1_ldflags)
1871
1872 # GCC GRAPHITE dependency isl.
1873 # Basic setup is inlined here, actual checks are in config/isl.m4
1874
1875 AC_ARG_WITH(isl,
1876   [AS_HELP_STRING(
1877    [--with-isl=PATH],
1878    [Specify prefix directory for the installed isl package.
1879     Equivalent to --with-isl-include=PATH/include
1880     plus --with-isl-lib=PATH/lib])])
1881
1882 # Treat --without-isl as a request to disable
1883 # GRAPHITE support and skip all following checks.
1884 if test "x$with_isl" != "xno"; then
1885   # Check for isl
1886   dnl Provide configure switches and initialize islinc & isllibs
1887   dnl with user input.
1888   ISL_INIT_FLAGS
1889   dnl The versions of isl that work for Graphite
1890   ISL_CHECK_VERSION()
1891   dnl Only execute fail-action, if isl has been requested.
1892   ISL_IF_FAILED([
1893     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1894 fi
1895
1896 # If the isl check failed, disable builds of in-tree variant of isl
1897 if test "x$with_isl" = xno ||
1898    test "x$gcc_cv_isl" = xno; then
1899   noconfigdirs="$noconfigdirs isl"
1900   islinc=
1901 fi
1902
1903 AC_SUBST(isllibs)
1904 AC_SUBST(islinc)
1905
1906 # Check for LTO support.
1907 AC_ARG_ENABLE(lto,
1908 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1909 enable_lto=$enableval,
1910 enable_lto=yes; default_enable_lto=yes)
1911
1912 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1913   build_lto_plugin=yes
1914 ],[if test x"$default_enable_lto" = x"yes" ; then
1915     case $target in
1916       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1917       # On other non-ELF platforms, LTO has yet to be validated.
1918       *) enable_lto=no ;;
1919     esac
1920   else
1921   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1922   # It would also be nice to check the binutils support, but we don't
1923   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1924   # warn during gcc/ subconfigure; unless you're bootstrapping with
1925   # -flto it won't be needed until after installation anyway.
1926     case $target in
1927       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1928       *) if test x"$enable_lto" = x"yes"; then
1929         AC_MSG_ERROR([LTO support is not enabled for this target.])
1930         fi
1931       ;;
1932     esac
1933   fi
1934   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1935   # Build it unless LTO was explicitly disabled.
1936   case $target in
1937     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1938     *) ;;
1939   esac
1940 ])
1941
1942 AC_ARG_ENABLE(linker-plugin-configure-flags,
1943   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1944     [additional flags for configuring linker plugins @<:@none@:>@])],
1945   extra_linker_plugin_configure_flags=$enableval,
1946   extra_linker_plugin_configure_flags=)
1947 AC_SUBST(extra_linker_plugin_configure_flags)
1948 AC_ARG_ENABLE(linker-plugin-flags,
1949   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1950     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1951   extra_linker_plugin_flags=$enableval,
1952   extra_linker_plugin_flags=)
1953 AC_SUBST(extra_linker_plugin_flags)
1954
1955 # Handle --enable-host-pie
1956 # If host PIE executables are the default (or must be forced on) for some host,
1957 # we must pass that configuration to the gcc directory.
1958 gcc_host_pie=
1959 AC_ARG_ENABLE(host-pie,
1960 [AS_HELP_STRING([--enable-host-pie],
1961                 [build position independent host executables])],
1962 [host_pie=$enableval
1963  case $host in
1964    *-*-darwin2*)
1965      if test x$host_pie != xyes ; then
1966        # for Darwin20+ this is required.
1967        AC_MSG_WARN([PIE executables are required for the configured host, host-pie setting ignored.])
1968        host_pie=yes
1969        gcc_host_pie=--enable-host-pie
1970      fi ;;
1971   *) ;;
1972  esac],
1973 [case $host in
1974   *-*-darwin2*)
1975     # Default to PIE (mandatory for aarch64).
1976     host_pie=yes
1977     gcc_host_pie=--enable-host-pie
1978     ;;
1979   *) host_pie=no ;;
1980  esac])
1981
1982 AC_SUBST(host_pie)
1983 AC_SUBST(gcc_host_pie)
1984
1985 # Enable --enable-host-shared.
1986 # Checked early to determine whether jit is an 'all' language
1987 AC_ARG_ENABLE(host-shared,
1988 [AS_HELP_STRING([--enable-host-shared],
1989                 [build host code as shared libraries])],
1990 [host_shared=$enableval
1991  case $host in
1992    x86_64-*-darwin* | aarch64-*-darwin*)
1993      if test x$host_shared != xyes ; then
1994        # PIC is the default, and actually cannot be switched off.
1995        AC_MSG_WARN([PIC code is required for the configured host; host-shared setting ignored.])
1996        host_shared=yes
1997      fi ;;
1998    *-*-darwin*)
1999      if test x$host_pie = xyes -a x$host_shared != xyes ; then
2000        AC_MSG_WARN([PIC code is required for PIE host executables host-shared setting ignored.])
2001        host_shared=yes
2002      fi ;;
2003   *) ;;
2004  esac],
2005 [case $host in
2006   # 64B x86_64 and Aarch64 Darwin default to PIC.
2007   x86_64-*-darwin* | aarch64-*-darwin*) host_shared=yes ;;
2008   # 32B and powerpc64 Darwin must use PIC to link PIE exes.
2009   *-*-darwin*) host_shared=$host_pie ;;
2010   *) host_shared=no;;
2011  esac])
2012
2013 AC_SUBST(host_shared)
2014
2015 if test x$host_shared = xyes; then
2016   case $host in
2017     *-*-darwin*)
2018       # Since host shared is the default for 64b Darwin, and also enabled for
2019       # host_pie, ensure that we present the PIE flag when host_pie is active.
2020       if test x$host_pie = xyes; then
2021         PICFLAG=-fPIE
2022       fi
2023       ;;
2024     *)
2025       PICFLAG=-fPIC
2026       ;;
2027   esac
2028 elif test x$host_pie = xyes; then
2029   PICFLAG=-fPIE
2030 else
2031   PICFLAG=
2032 fi
2033
2034 AC_SUBST(PICFLAG)
2035
2036 # If we are building PIC/PIE host executables, and we are building dependent
2037 # libs (e.g. GMP) in-tree those libs need to be configured to generate PIC
2038 # code.
2039 host_libs_picflag=
2040 if test "$host_shared" = "yes" -o "$host_pie" = "yes"; then
2041 host_libs_picflag='--with-pic'
2042 fi
2043 AC_SUBST(host_libs_picflag)
2044
2045 # By default, C and C++ are the only stage 1 languages.
2046 stage1_languages=,c,
2047
2048 # Target libraries that we bootstrap.
2049 bootstrap_target_libs=,target-libgcc,
2050
2051 # Figure out what language subdirectories are present.
2052 # Look if the user specified --enable-languages="..."; if not, use
2053 # the environment variable $LANGUAGES if defined. $LANGUAGES might
2054 # go away some day.
2055 # NB:  embedded tabs in this IF block -- do not untabify
2056 if test -d ${srcdir}/gcc; then
2057   if test x"${enable_languages+set}" != xset; then
2058     if test x"${LANGUAGES+set}" = xset; then
2059       enable_languages="${LANGUAGES}"
2060         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
2061     else
2062       enable_languages=default
2063     fi
2064   else
2065     if test x"${enable_languages}" = x ||
2066        test x"${enable_languages}" = xyes;
2067        then
2068       echo configure.ac: --enable-languages needs at least one language argument 1>&2
2069       exit 1
2070     fi
2071   fi
2072   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
2073
2074   # 'f95' is the old name for the 'fortran' language. We issue a warning
2075   # and make the substitution.
2076   case ,${enable_languages}, in
2077     *,f95,*)
2078       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
2079       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
2080       ;;
2081   esac
2082
2083   # If bootstrapping, C++ must be enabled.
2084   case ",$enable_languages,:$enable_bootstrap" in
2085     *,c++,*:*) ;;
2086     *:yes)
2087       if test -f ${srcdir}/gcc/cp/config-lang.in; then
2088         enable_languages="${enable_languages},c++"
2089       else
2090         AC_MSG_ERROR([bootstrapping requires c++ sources])
2091       fi
2092       ;;
2093   esac
2094
2095   # First scan to see if an enabled language requires some other language.
2096   # We assume that a given config-lang.in will list all the language
2097   # front ends it requires, even if some are required indirectly.
2098   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2099     case ${lang_frag} in
2100       ..) ;;
2101       # The odd quoting in the next line works around
2102       # an apparent bug in bash 1.12 on linux.
2103       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2104       *)
2105         # From the config-lang.in, get $language, $lang_requires, and
2106         # $lang_requires_boot_languages.
2107         language=
2108         lang_requires=
2109         lang_requires_boot_languages=
2110         # set srcdir during sourcing lang_frag to the gcc dir.
2111         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
2112         # polutes this shell
2113         saved_srcdir=${srcdir}
2114         srcdir=${srcdir}/gcc . ${lang_frag}
2115         srcdir=${saved_srcdir}
2116         for other in ${lang_requires} ${lang_requires_boot_languages}; do
2117           case ,${enable_languages}, in
2118             *,$other,*) ;;
2119             *,default,*) ;;
2120             *,all,*) ;;
2121             *,$language,*)
2122               echo " \`$other' language required by \`$language'; enabling" 1>&2
2123               enable_languages="${enable_languages},${other}"
2124               ;;
2125           esac
2126         done
2127         for other in ${lang_requires_boot_languages} ; do
2128           if test "$other" != "c"; then
2129             case ,${enable_stage1_languages}, in
2130               *,$other,*) ;;
2131               *,default,*) ;;
2132               *,all,*) ;;
2133               *)
2134                 case ,${enable_languages}, in
2135                   *,$language,*)
2136                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
2137                     enable_stage1_languages="$enable_stage1_languages,${other}"
2138                     ;;
2139                 esac
2140                 ;;
2141             esac
2142           fi
2143         done
2144         ;;
2145     esac
2146   done
2147
2148   new_enable_languages=,c,
2149
2150   # If LTO is enabled, add the LTO front end.
2151   if test "$enable_lto" = "yes" ; then
2152     case ,${enable_languages}, in
2153       *,lto,*) ;;
2154       *) enable_languages="${enable_languages},lto" ;;
2155     esac
2156     if test "${build_lto_plugin}" = "yes" ; then
2157       configdirs="$configdirs lto-plugin"
2158     fi
2159   fi
2160
2161   # If we're building an offloading compiler, add the LTO front end.
2162   if test x"$enable_as_accelerator_for" != x ; then
2163     case ,${enable_languages}, in
2164       *,lto,*) ;;
2165       *) enable_languages="${enable_languages},lto" ;;
2166     esac
2167   fi
2168
2169   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
2170   potential_languages=,c,
2171
2172   enabled_target_libs=
2173   disabled_target_libs=
2174
2175   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2176     case ${lang_frag} in
2177       ..) ;;
2178       # The odd quoting in the next line works around
2179       # an apparent bug in bash 1.12 on linux.
2180       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2181       *)
2182         # From the config-lang.in, get $language, $target_libs,
2183         # $lang_dirs, $boot_language, and $build_by_default
2184         language=
2185         target_libs=
2186         lang_dirs=
2187         subdir_requires=
2188         boot_language=no
2189         build_by_default=yes
2190         # set srcdir during sourcing.  See above about save & restore
2191         saved_srcdir=${srcdir}
2192         srcdir=${srcdir}/gcc . ${lang_frag}
2193         srcdir=${saved_srcdir}
2194         if test x${language} = x; then
2195           echo "${lang_frag} doesn't set \$language." 1>&2
2196           exit 1
2197         fi
2198
2199         if test "$language" = "c++"; then
2200           boot_language=yes
2201         fi
2202
2203         add_this_lang=no
2204         # C is always enabled, so no need to add it again
2205         if test "$language" != "c"; then
2206           case ,${enable_languages}, in
2207             *,${language},*)
2208               # Language was explicitly selected; include it
2209               add_this_lang=yes
2210               ;;
2211             *,all,*)
2212               # All languages are enabled
2213               add_this_lang=all
2214               ;;
2215             *,default,*)
2216               # 'default' was selected, select it if it is a default language
2217               add_this_lang=${build_by_default}
2218               ;;
2219           esac
2220         fi
2221
2222         # Disable languages that need other directories if these aren't available.
2223         for i in $subdir_requires; do
2224           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2225           case ${add_this_lang} in
2226             yes)
2227               # Specifically requested language; tell them.
2228               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2229               ;;
2230             all)
2231               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2232               add_this_lang=unsupported
2233               ;;
2234             *)
2235               # Silently disable.
2236               add_this_lang=unsupported
2237               ;;
2238           esac
2239         done
2240
2241         # Disable Ada if no preexisting GNAT is available.
2242         case ${add_this_lang}:${language}:${have_gnat} in
2243           yes:ada:no)
2244             # Specifically requested language; tell them.
2245             AC_MSG_ERROR([GNAT is required to build $language])
2246             ;;
2247           all:ada:no)
2248             AC_MSG_WARN([GNAT is required to build $language])
2249             add_this_lang=unsupported
2250             ;;
2251           *:ada:no)
2252             # Silently disable.
2253             add_this_lang=unsupported
2254             ;;
2255         esac
2256
2257         # Disable D if no preexisting GDC is available.
2258         case ${add_this_lang}:${language}:${have_gdc} in
2259           yes:d:no)
2260             # Specifically requested language; tell them.
2261             AC_MSG_ERROR([GDC is required to build $language])
2262            ;;
2263           all:d:no)
2264             AC_MSG_WARN([GDC is required to build $language])
2265             add_this_lang=unsupported
2266             ;;
2267           *:d:no)
2268             # Silently disable.
2269             add_this_lang=unsupported
2270             ;;
2271         esac
2272
2273         # Disable jit if -enable-host-shared not specified
2274         # but not if building for Mingw. All code in Windows
2275         # is position independent code (PIC).
2276         case $target in
2277           *mingw*) ;;
2278           *)
2279           case ${add_this_lang}:${language}:${host_shared} in
2280             yes:jit:no)
2281                    # PR jit/64780: explicitly specify --enable-host-shared
2282             AC_MSG_ERROR([
2283 Enabling language "jit" requires --enable-host-shared.
2284
2285 --enable-host-shared typically slows the rest of the compiler down by
2286 a few %, so you must explicitly enable it.
2287
2288 If you want to build both the jit and the regular compiler, it is often
2289 best to do this via two separate configure/builds, in separate
2290 directories, to avoid imposing the performance cost of
2291 --enable-host-shared on the regular compiler.])
2292                     ;;
2293             all:jit:no)
2294               AC_MSG_WARN([--enable-host-shared required to build $language])
2295               add_this_lang=unsupported
2296               ;;
2297             *:jit:no)
2298               # Silently disable.
2299               add_this_lang=unsupported
2300               ;;
2301                 esac
2302           ;;
2303         esac
2304
2305         # Disable a language that is unsupported by the target.
2306         case "${add_this_lang}: $unsupported_languages " in
2307           no:*) ;;
2308           unsupported:*) ;;
2309           *:*" $language "*)
2310             AC_MSG_WARN([${language} not supported for this target])
2311             add_this_lang=unsupported
2312             ;;
2313         esac
2314
2315         case $add_this_lang in
2316           unsupported)
2317             # Remove language-dependent dirs.
2318             disabled_target_libs="$disabled_target_libs $target_libs"
2319             noconfigdirs="$noconfigdirs $lang_dirs"
2320             ;;
2321           no)
2322             # Remove language-dependent dirs; still show language as supported.
2323             disabled_target_libs="$disabled_target_libs $target_libs"
2324             noconfigdirs="$noconfigdirs $lang_dirs"
2325             potential_languages="${potential_languages}${language},"
2326             ;;
2327           all|yes)
2328             new_enable_languages="${new_enable_languages}${language},"
2329             potential_languages="${potential_languages}${language},"
2330             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2331             enabled_target_libs="$enabled_target_libs $target_libs"
2332             case "${boot_language}:,$enable_stage1_languages," in
2333               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2334                 # Add to (comma-separated) list of stage 1 languages.
2335                 case ",$stage1_languages," in
2336                   *,$language,* | ,yes, | ,all,) ;;
2337                   *) stage1_languages="${stage1_languages}${language}," ;;
2338                 esac
2339                 # We need to bootstrap any supporting libraries.
2340                 bootstrap_target_libs=`echo "${bootstrap_target_libs}${target_libs}," | sed "s/ /,/g"`
2341                 ;;
2342             esac
2343             ;;
2344         esac
2345         ;;
2346     esac
2347   done
2348
2349   # Add target libraries which are only needed for disabled languages
2350   # to noconfigdirs.
2351   if test -n "$disabled_target_libs"; then
2352     for dir in $disabled_target_libs; do
2353       case " $enabled_target_libs " in
2354       *" ${dir} "*) ;;
2355       *) noconfigdirs="$noconfigdirs $dir" ;;
2356       esac
2357     done
2358   fi
2359
2360   AC_ARG_ENABLE(stage1-languages,
2361   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2362                   [choose additional languages to build during
2363                   stage1.  Mostly useful for compiler development])],
2364   [case ,${enable_stage1_languages}, in
2365     ,no,|,,)
2366       # Set it to something that will have no effect in the loop below
2367       enable_stage1_languages=c ;;
2368     ,yes,)
2369       enable_stage1_languages=`echo $new_enable_languages | \
2370         sed -e "s/^,//" -e "s/,$//" ` ;;
2371     *,all,*)
2372       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2373         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2374   esac
2375
2376   # Add "good" languages from enable_stage1_languages to stage1_languages,
2377   # while "bad" languages go in missing_languages.  Leave no duplicates.
2378   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2379     case $potential_languages in
2380       *,$i,*)
2381         case $stage1_languages in
2382           *,$i,*) ;;
2383           *) stage1_languages="$stage1_languages$i," ;;
2384         esac ;;
2385       *)
2386         case $missing_languages in
2387           *,$i,*) ;;
2388           *) missing_languages="$missing_languages$i," ;;
2389         esac ;;
2390      esac
2391   done])
2392
2393   # Remove leading/trailing commas that were added for simplicity
2394   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2395   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2396   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2397   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2398
2399   if test "x$missing_languages" != x; then
2400     AC_MSG_ERROR([
2401 The following requested languages could not be built: ${missing_languages}
2402 Supported languages are: ${potential_languages}])
2403   fi
2404   if test "x$new_enable_languages" != "x$enable_languages"; then
2405     echo The following languages will be built: ${new_enable_languages}
2406     enable_languages="$new_enable_languages"
2407   fi
2408
2409   AC_SUBST(stage1_languages)
2410   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2411 fi
2412
2413 # Handle --disable-<component> generically.
2414 for dir in $configdirs $build_configdirs $target_configdirs ; do
2415   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2416   varname=`echo $dirname | sed -e s/+/_/g`
2417   if eval test x\${enable_${varname}} "=" xno ; then
2418     noconfigdirs="$noconfigdirs $dir"
2419   fi
2420 done
2421
2422 # Check for Boehm's garbage collector
2423 AC_ARG_ENABLE(objc-gc,
2424 [AS_HELP_STRING([--enable-objc-gc],
2425                 [enable use of Boehm's garbage collector with the
2426                  GNU Objective-C runtime])])
2427 AC_ARG_WITH([target-bdw-gc],
2428 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2429                 [specify prefix directory for installed bdw-gc package.
2430                  Equivalent to --with-target-bdw-gc-include=PATH/include
2431                  plus --with-target-bdw-gc-lib=PATH/lib])])
2432 AC_ARG_WITH([target-bdw-gc-include],
2433 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2434                 [specify directories for installed bdw-gc include files])])
2435 AC_ARG_WITH([target-bdw-gc-lib],
2436 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2437                 [specify directories for installed bdw-gc library])])
2438
2439 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2440   AC_MSG_CHECKING([for bdw garbage collector])
2441   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2442     dnl no bdw-gw options, assume default locations
2443     AC_MSG_RESULT([using bdw-gc in default locations])
2444   else
2445     dnl bdw-gw options, first error checking, complete checking in libobjc
2446     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2447       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2448     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2449       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2450     else
2451       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2452     fi
2453   fi
2454 esac
2455
2456 # Disable libitm, libsanitizer, libvtv if we're not building C++
2457 case ,${enable_languages}, in
2458   *,c++,*)
2459     # Disable libitm, libsanitizer if we're not building libstdc++
2460     case "${noconfigdirs}" in
2461       *target-libstdc++-v3*)
2462         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2463         ;;
2464       *) ;;
2465     esac
2466     ;;
2467   *)
2468     noconfigdirs="$noconfigdirs target-libitm target-libsanitizer target-libvtv"
2469     ;;
2470 esac
2471
2472 # If gcc/ is not in the source tree then we'll not be building a
2473 # target compiler, assume in that case we don't want to build any
2474 # target libraries or tools.
2475 #
2476 # This was added primarily for the benefit for binutils-gdb who reuse
2477 # this configure script, but don't always have target tools available.
2478 if test ! -d ${srcdir}/gcc; then
2479    skipdirs="${skipdirs} ${target_configdirs}"
2480 fi
2481
2482 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2483 # $build_configdirs and $target_configdirs.
2484 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2485
2486 notsupp=""
2487 for dir in . $skipdirs $noconfigdirs ; do
2488   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2489   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2490     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2491     if test -r $srcdir/$dirname/configure ; then
2492       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2493         true
2494       else
2495         notsupp="$notsupp $dir"
2496       fi
2497     fi
2498   fi
2499   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2500     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2501     if test -r $srcdir/$dirname/configure ; then
2502       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2503         true
2504       else
2505         notsupp="$notsupp $dir"
2506       fi
2507     fi
2508   fi
2509   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2510     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2511     if test -r $srcdir/$dirname/configure ; then
2512       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2513         true
2514       else
2515         notsupp="$notsupp $dir"
2516       fi
2517     fi
2518   fi
2519 done
2520
2521 # Quietly strip out all directories which aren't configurable in this tree.
2522 # This relies on all configurable subdirectories being autoconfiscated, which
2523 # is now the case.
2524 build_configdirs_all="$build_configdirs"
2525 build_configdirs=
2526 for i in ${build_configdirs_all} ; do
2527   j=`echo $i | sed -e s/build-//g`
2528   if test -f ${srcdir}/$j/configure ; then
2529     build_configdirs="${build_configdirs} $i"
2530   fi
2531 done
2532
2533 configdirs_all="$configdirs"
2534 configdirs=
2535 for i in ${configdirs_all} ; do
2536   if test -f ${srcdir}/$i/configure ; then
2537     configdirs="${configdirs} $i"
2538   fi
2539 done
2540
2541 target_configdirs_all="$target_configdirs"
2542 target_configdirs=
2543 for i in ${target_configdirs_all} ; do
2544   j=`echo $i | sed -e s/target-//g`
2545   if test -f ${srcdir}/$j/configure ; then
2546     target_configdirs="${target_configdirs} $i"
2547   fi
2548 done
2549
2550 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2551 # so we have to add it after the preceding checks.
2552 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2553 then
2554   case " $configdirs " in
2555     *" libiberty "*)
2556       # If we can build libiberty, we can also build libiberty-linker-plugin.
2557       configdirs="$configdirs libiberty-linker-plugin"
2558       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2559         --with-libiberty=../libiberty-linker-plugin";;
2560     *)
2561       AC_MSG_ERROR([libiberty missing]);;
2562   esac
2563 fi
2564
2565 # Sometimes we have special requirements for the host libiberty.
2566 extra_host_libiberty_configure_flags=
2567 case " $configdirs " in
2568   *" lto-plugin "* | *" libcc1 "* | *" gdbserver "*)
2569     # When these are to be built as shared libraries, the same applies to
2570     # libiberty.
2571     extra_host_libiberty_configure_flags=--enable-shared
2572     ;;
2573 esac
2574 AC_SUBST(extra_host_libiberty_configure_flags)
2575
2576 # Sometimes we have special requirements for the host zlib.
2577 extra_host_zlib_configure_flags=
2578 case " $configdirs " in
2579   *" bfd "*)
2580     # When bfd is to be built as a shared library, the same applies to
2581     # zlib.
2582     if test "$enable_shared" = "yes"; then
2583       extra_host_zlib_configure_flags=--enable-host-shared
2584     fi
2585     ;;
2586 esac
2587 AC_SUBST(extra_host_zlib_configure_flags)
2588
2589 # Produce a warning message for the subdirs we can't configure.
2590 # This isn't especially interesting in the Cygnus tree, but in the individual
2591 # FSF releases, it's important to let people know when their machine isn't
2592 # supported by the one or two programs in a package.
2593
2594 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2595   # If $appdirs is non-empty, at least one of those directories must still
2596   # be configured, or we error out.  (E.g., if the gas release supports a
2597   # specified target in some subdirs but not the gas subdir, we shouldn't
2598   # pretend that all is well.)
2599   if test -n "$appdirs" ; then
2600     for dir in $appdirs ; do
2601       if test -r $dir/Makefile.in ; then
2602         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2603           appdirs=""
2604           break
2605         fi
2606         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2607           appdirs=""
2608           break
2609         fi
2610       fi
2611     done
2612     if test -n "$appdirs" ; then
2613       echo "*** This configuration is not supported by this package." 1>&2
2614       exit 1
2615     fi
2616   fi
2617   # Okay, some application will build, or we don't care to check.  Still
2618   # notify of subdirs not getting built.
2619   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2620   echo "    ${notsupp}" 1>&2
2621   echo "    (Any other directories should still work fine.)" 1>&2
2622 fi
2623
2624 case "$host" in
2625   *msdosdjgpp*)
2626     enable_gdbtk=no ;;
2627 esac
2628
2629 # To find our prefix, in gcc_cv_tool_prefix.
2630 ACX_TOOL_DIRS
2631
2632 copy_dirs=
2633
2634 AC_ARG_WITH([build-sysroot],
2635   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2636                   [use sysroot as the system root during the build])],
2637   [if test x"$withval" != x ; then
2638      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2639    fi],
2640   [SYSROOT_CFLAGS_FOR_TARGET=])
2641 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2642
2643 AC_ARG_WITH([debug-prefix-map],
2644   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2645                   [map A to B, C to D ... in debug information])],
2646   [if test x"$withval" != x; then
2647      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2648      for debug_map in $withval; do
2649        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2650      done
2651    fi],
2652   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2653 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2654
2655 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2656 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2657 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2658 # We want to ensure that TARGET libraries (which we know are built with
2659 # gcc) are built with "-O2 -g", so include those options when setting
2660 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2661 if test "x$CFLAGS_FOR_TARGET" = x; then
2662   if test "x${is_cross_compiler}" = xyes; then
2663     CFLAGS_FOR_TARGET="-g -O2"
2664   else
2665     CFLAGS_FOR_TARGET=$CFLAGS
2666     case " $CFLAGS " in
2667       *" -O2 "*) ;;
2668       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2669     esac
2670     case " $CFLAGS " in
2671       *" -g "* | *" -g3 "*) ;;
2672       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2673     esac
2674   fi
2675 fi
2676 AC_SUBST(CFLAGS_FOR_TARGET)
2677
2678 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2679   if test "x${is_cross_compiler}" = xyes; then
2680     CXXFLAGS_FOR_TARGET="-g -O2"
2681   else
2682     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2683     case " $CXXFLAGS " in
2684       *" -O2 "*) ;;
2685       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2686     esac
2687     case " $CXXFLAGS " in
2688       *" -g "* | *" -g3 "*) ;;
2689       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2690     esac
2691   fi
2692 fi
2693 AC_SUBST(CXXFLAGS_FOR_TARGET)
2694
2695 AC_SUBST(LDFLAGS_FOR_TARGET)
2696
2697 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2698 # the named directory are copied to $(tooldir)/sys-include.
2699 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2700   if test x${is_cross_compiler} = xno ; then
2701     echo 1>&2 '***' --with-headers is only supported when cross compiling
2702     exit 1
2703   fi
2704   if test x"${with_headers}" != xyes ; then
2705     x=${gcc_cv_tool_prefix}
2706     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2707   fi
2708 fi
2709
2710 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2711 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2712 # are permitted.
2713 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2714   if test x${is_cross_compiler} = xno ; then
2715     echo 1>&2 '***' --with-libs is only supported when cross compiling
2716     exit 1
2717   fi
2718   if test x"${with_libs}" != xyes ; then
2719     # Copy the libraries in reverse order, so that files in the first named
2720     # library override files in subsequent libraries.
2721     x=${gcc_cv_tool_prefix}
2722     for l in ${with_libs}; do
2723       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2724     done
2725   fi
2726 fi
2727
2728 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2729 #
2730 # This is done by determining whether or not the appropriate directory
2731 # is available, and by checking whether or not specific configurations
2732 # have requested that this magic not happen.
2733 #
2734 # The command line options always override the explicit settings in
2735 # configure.ac, and the settings in configure.ac override this magic.
2736 #
2737 # If the default for a toolchain is to use GNU as and ld, and you don't
2738 # want to do that, then you should use the --without-gnu-as and
2739 # --without-gnu-ld options for the configure script.  Similarly, if
2740 # the default is to use the included zlib and you don't want to do that,
2741 # you should use the --with-system-zlib option for the configure script.
2742
2743 if test x${use_gnu_as} = x &&
2744    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2745   with_gnu_as=yes
2746   extra_host_args="$extra_host_args --with-gnu-as"
2747 fi
2748
2749 if test x${use_gnu_ld} = x &&
2750    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2751   with_gnu_ld=yes
2752   extra_host_args="$extra_host_args --with-gnu-ld"
2753 fi
2754
2755 if test x${use_included_zlib} = x &&
2756    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2757   :
2758 else
2759   with_system_zlib=yes
2760   extra_host_args="$extra_host_args --with-system-zlib"
2761 fi
2762
2763 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2764 # can detect this case.
2765
2766 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2767   with_newlib=yes
2768   extra_host_args="$extra_host_args --with-newlib"
2769 fi
2770
2771 # Handle ${copy_dirs}
2772 set fnord ${copy_dirs}
2773 shift
2774 while test $# != 0 ; do
2775   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2776     :
2777   else
2778     echo Copying $1 to $2
2779
2780     # Use the install script to create the directory and all required
2781     # parent directories.
2782     if test -d $2 ; then
2783       :
2784     else
2785       echo >config.temp
2786       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2787     fi
2788
2789     # Copy the directory, assuming we have tar.
2790     # FIXME: Should we use B in the second tar?  Not all systems support it.
2791     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2792
2793     # It is the responsibility of the user to correctly adjust all
2794     # symlinks.  If somebody can figure out how to handle them correctly
2795     # here, feel free to add the code.
2796
2797     echo $1 > $2/COPIED
2798   fi
2799   shift; shift
2800 done
2801
2802 # Determine a target-dependent exec_prefix that the installed
2803 # gcc will search in.  Keep this list sorted by triplet, with
2804 # the *-*-osname triplets last.
2805 md_exec_prefix=
2806 case "${target}" in
2807   i[[34567]]86-pc-msdosdjgpp*)
2808     md_exec_prefix=/dev/env/DJDIR/bin
2809     ;;
2810   *-*-hpux* | \
2811   *-*-nto-qnx* | \
2812   *-*-solaris2*)
2813     md_exec_prefix=/usr/ccs/bin
2814     ;;
2815 esac
2816
2817 extra_arflags_for_target=
2818 extra_nmflags_for_target=
2819 extra_ranlibflags_for_target=
2820 target_makefile_frag=/dev/null
2821 case "${target}" in
2822   spu-*-*)
2823     target_makefile_frag="config/mt-spu"
2824     ;;
2825   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2826     target_makefile_frag="config/mt-sde"
2827     ;;
2828   mipsisa*-*-elfoabi*)
2829     target_makefile_frag="config/mt-mips-elfoabi"
2830     ;;
2831   mips*-*-*linux* | mips*-*-gnu*)
2832     target_makefile_frag="config/mt-mips-gnu"
2833     ;;
2834   nios2-*-elf*)
2835     target_makefile_frag="config/mt-nios2-elf"
2836     ;;
2837   *-*-linux-android*)
2838     target_makefile_frag="config/mt-android"
2839     ;;
2840   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2841     target_makefile_frag="config/mt-gnu"
2842     ;;
2843   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2844     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2845     # commands to handle both 32-bit and 64-bit objects.  These flags are
2846     # harmless if we're using GNU nm or ar.
2847     extra_arflags_for_target=" -X32_64"
2848     extra_nmflags_for_target=" -B -X32_64"
2849     ;;
2850 esac
2851
2852 alphaieee_frag=/dev/null
2853 case $target in
2854   alpha*-*-*)
2855     # This just makes sure to use the -mieee option to build target libs.
2856     # This should probably be set individually by each library.
2857     alphaieee_frag="config/mt-alphaieee"
2858     ;;
2859 esac
2860
2861 # If --enable-target-optspace always use -Os instead of -O2 to build
2862 # the target libraries, similarly if it is not specified, use -Os
2863 # on selected platforms.
2864 ospace_frag=/dev/null
2865 case "${enable_target_optspace}:${target}" in
2866   yes:*)
2867     ospace_frag="config/mt-ospace"
2868     ;;
2869   :d30v-*)
2870     ospace_frag="config/mt-d30v"
2871     ;;
2872   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2873     ospace_frag="config/mt-ospace"
2874     ;;
2875   no:* | :*)
2876     ;;
2877   *)
2878     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2879     ;;
2880 esac
2881
2882 # Some systems (e.g., one of the i386-aix systems the gas testers are
2883 # using) don't handle "\$" correctly, so don't use it here.
2884 tooldir='${exec_prefix}'/${target_noncanonical}
2885 build_tooldir=${tooldir}
2886
2887 # Create a .gdbinit file which runs the one in srcdir
2888 # and tells GDB to look there for source files.
2889
2890 if test -r ${srcdir}/.gdbinit ; then
2891   case ${srcdir} in
2892     .) ;;
2893     *) cat > ./.gdbinit <<EOF
2894 # ${NO_EDIT}
2895 dir ${srcdir}
2896 dir .
2897 source ${srcdir}/.gdbinit
2898 EOF
2899     ;;
2900   esac
2901 fi
2902
2903 # Make sure that the compiler is able to generate an executable.  If it
2904 # can't, we are probably in trouble.  We don't care whether we can run the
2905 # executable--we might be using a cross compiler--we only care whether it
2906 # can be created.  At this point the main configure script has set CC.
2907 we_are_ok=no
2908 echo "int main () { return 0; }" > conftest.c
2909 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2910 if test $? = 0 ; then
2911   if test -s conftest || test -s conftest.exe ; then
2912     we_are_ok=yes
2913   fi
2914 fi
2915 case $we_are_ok in
2916   no)
2917     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2918     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2919     rm -f conftest*
2920     exit 1
2921     ;;
2922 esac
2923 rm -f conftest*
2924
2925 # Decide which environment variable is used to find dynamic libraries.
2926 case "${host}" in
2927   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2928   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2929   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2930   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2931 esac
2932
2933 # On systems where the dynamic library environment variable is PATH,
2934 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2935 # built executables to PATH.
2936 if test "$RPATH_ENVVAR" = PATH; then
2937   GCC_SHLIB_SUBDIR=/shlib
2938 else
2939   GCC_SHLIB_SUBDIR=
2940 fi
2941
2942 # Adjust the toplevel makefile according to whether bootstrap was selected.
2943 case $enable_bootstrap in
2944   yes)
2945     bootstrap_suffix=bootstrap
2946     BUILD_CONFIG=bootstrap-debug
2947     ;;
2948   no)
2949     bootstrap_suffix=no-bootstrap
2950     BUILD_CONFIG=
2951     ;;
2952 esac
2953
2954 AC_MSG_CHECKING(for default BUILD_CONFIG)
2955
2956 AC_ARG_WITH([build-config],
2957   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2958                   [use config/NAME.mk build configuration])],
2959   [case $with_build_config in
2960    yes) with_build_config= ;;
2961    no) with_build_config= BUILD_CONFIG= ;;
2962    esac])
2963
2964 if test "x${with_build_config}" != x; then
2965   BUILD_CONFIG=$with_build_config
2966 else
2967   case $BUILD_CONFIG in
2968   bootstrap-debug)
2969     if echo "int f (void) { return 0; }" > conftest.c &&
2970        ${CC} -c conftest.c &&
2971        mv conftest.o conftest.o.g0 &&
2972        ${CC} -c -g conftest.c &&
2973        mv conftest.o conftest.o.g &&
2974        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2975       :
2976     else
2977       BUILD_CONFIG=
2978     fi
2979     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2980     ;;
2981   esac
2982 fi
2983 AC_MSG_RESULT($BUILD_CONFIG)
2984 AC_SUBST(BUILD_CONFIG)
2985
2986 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2987 AC_MSG_CHECKING([for --enable-vtable-verify])
2988 AC_ARG_ENABLE(vtable-verify,
2989 [AS_HELP_STRING([--enable-vtable-verify],
2990                 [Enable vtable verification feature])],
2991 [case "$enableval" in
2992  yes) enable_vtable_verify=yes ;;
2993  no)  enable_vtable_verify=no ;;
2994  *)   enable_vtable_verify=no;;
2995  esac],
2996 [enable_vtable_verify=no])
2997 AC_MSG_RESULT($enable_vtable_verify)
2998
2999 # Record target_configdirs and the configure arguments for target and
3000 # build configuration in Makefile.
3001 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
3002 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
3003 bootstrap_fixincludes=no
3004
3005 # If we are building libgomp, bootstrap it.
3006 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
3007   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
3008 fi
3009
3010 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
3011 # or bootstrap-ubsan, bootstrap it.
3012 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
3013   case "$BUILD_CONFIG" in
3014     *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
3015       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
3016       bootstrap_fixincludes=yes
3017       ;;
3018   esac
3019 fi
3020
3021 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
3022 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
3023    test "$enable_vtable_verify" != no; then
3024   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
3025 fi
3026
3027 # If we are building libatomic and the list of enabled languages includes the
3028 # D frontend, bootstrap it.
3029 if echo " ${target_configdirs} " | grep " libatomic " > /dev/null 2>&1; then
3030   case ,${enable_languages}, in
3031     *,d,*)
3032       bootstrap_target_libs=${bootstrap_target_libs}target-libatomic,
3033       ;;
3034   esac
3035 fi
3036
3037 # Determine whether gdb needs tk/tcl or not.
3038 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
3039 # and in that case we want gdb to be built without tk.  Ugh!
3040 # In fact I believe gdb is the *only* package directly dependent on tk,
3041 # so we should be able to put the 'maybe's in unconditionally and
3042 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
3043 # 100% sure that that's safe though.
3044
3045 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
3046 case "$enable_gdbtk" in
3047   no)
3048     GDB_TK="" ;;
3049   yes)
3050     GDB_TK="${gdb_tk}" ;;
3051   *)
3052     # Only add the dependency on gdbtk when GDBtk is part of the gdb
3053     # distro.  Eventually someone will fix this and move Insight, nee
3054     # gdbtk to a separate directory.
3055     if test -d ${srcdir}/gdb/gdbtk ; then
3056       GDB_TK="${gdb_tk}"
3057     else
3058       GDB_TK=""
3059     fi
3060     ;;
3061 esac
3062 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
3063 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
3064
3065 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
3066 # else does, only include them if one of these is built.  The Makefile
3067 # provides the ordering, so it's enough here to add to the list.
3068 case " ${configdirs} " in
3069   *\ gdb\ *)
3070     configdirs="${configdirs} gnulib gdbsupport"
3071     ;;
3072   *\ gdbserver\ *)
3073     configdirs="${configdirs} gnulib gdbsupport"
3074     ;;
3075   *\ sim\ *)
3076     configdirs="${configdirs} gnulib"
3077     ;;
3078 esac
3079
3080 # Strip out unwanted targets.
3081
3082 # While at that, we remove Makefiles if we were started for recursive
3083 # configuration, so that the top-level Makefile reconfigures them,
3084 # like we used to do when configure itself was recursive.
3085
3086 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
3087 # but now we're fixing up the Makefile ourselves with the additional
3088 # commands passed to AC_CONFIG_FILES.  Use separate variables
3089 # extrasub-{build,host,target} not because there is any reason to split
3090 # the substitutions up that way, but only to remain below the limit of
3091 # 99 commands in a script, for HP-UX sed.
3092
3093 # Do not nest @if/@endif or @unless/@endunless pairs, because
3094 # configure will not warn you at all.
3095
3096 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
3097   yes:yes:*\ gold\ *:*,c++,*) ;;
3098   yes:yes:*\ gold\ *:*)
3099     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
3100     ;;
3101 esac
3102
3103 extrasub_build=
3104 for module in ${build_configdirs} ; do
3105   if test -z "${no_recursion}" \
3106      && test -f ${build_subdir}/${module}/Makefile; then
3107     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
3108     rm -f ${build_subdir}/${module}/Makefile
3109   fi
3110   extrasub_build="$extrasub_build
3111 /^@if build-$module\$/d
3112 /^@endif build-$module\$/d
3113 /^@unless build-$module\$/,/^@endunless build-$module\$/d
3114 /^@if build-$module-$bootstrap_suffix\$/d
3115 /^@endif build-$module-$bootstrap_suffix\$/d
3116 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
3117 done
3118 extrasub_host=
3119 for module in ${configdirs} ; do
3120   if test -z "${no_recursion}"; then
3121     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
3122       if test -f ${file}; then
3123         echo 1>&2 "*** removing ${file} to force reconfigure"
3124         rm -f ${file}
3125       fi
3126     done
3127   fi
3128   case ${module},${bootstrap_fixincludes} in
3129     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
3130     *) host_bootstrap_suffix=$bootstrap_suffix ;;
3131   esac
3132   extrasub_host="$extrasub_host
3133 /^@if $module\$/d
3134 /^@endif $module\$/d
3135 /^@unless $module\$/,/^@endunless $module\$/d
3136 /^@if $module-$host_bootstrap_suffix\$/d
3137 /^@endif $module-$host_bootstrap_suffix\$/d
3138 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
3139 done
3140 extrasub_target=
3141 for module in ${target_configdirs} ; do
3142   if test -z "${no_recursion}" \
3143      && test -f ${target_subdir}/${module}/Makefile; then
3144     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
3145     rm -f ${target_subdir}/${module}/Makefile
3146   fi
3147
3148   # We only bootstrap target libraries listed in bootstrap_target_libs.
3149   case $bootstrap_target_libs in
3150     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
3151     *) target_bootstrap_suffix=no-bootstrap ;;
3152   esac
3153
3154   extrasub_target="$extrasub_target
3155 /^@if target-$module\$/d
3156 /^@endif target-$module\$/d
3157 /^@unless target-$module\$/,/^@endunless target-$module\$/d
3158 /^@if target-$module-$target_bootstrap_suffix\$/d
3159 /^@endif target-$module-$target_bootstrap_suffix\$/d
3160 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
3161 done
3162
3163 # Do the final fixup along with target modules.
3164 extrasub_target="$extrasub_target
3165 /^@if /,/^@endif /d
3166 /^@unless /d
3167 /^@endunless /d"
3168
3169 if test "$enable_pgo_build" != "no"; then
3170   extrasub_build="$extrasub_build
3171 /^@if pgo-build\$/d
3172 /^@endif pgo-build\$/d"
3173 fi
3174
3175 # Create the serialization dependencies.  This uses a temporary file.
3176
3177 AC_ARG_ENABLE([serial-configure],
3178 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
3179                 [force sequential configuration of
3180                  sub-packages for the host, target or build
3181                  machine, or all sub-packages])])
3182
3183 case ${enable_serial_configure} in
3184   yes)
3185     enable_serial_build_configure=yes
3186     enable_serial_host_configure=yes
3187     enable_serial_target_configure=yes
3188     ;;
3189 esac
3190
3191 # These force 'configure's to be done one at a time, to avoid problems
3192 # with contention over a shared config.cache.
3193 rm -f serdep.tmp
3194 if test "x${enable_serial_build_configure}" = xyes || test "x${enable_serial_host_configure}" = xyes || test "x${enable_serial_target_configure}" = xyes; then
3195 echo '# serdep.tmp' > serdep.tmp
3196 fi
3197 olditem=
3198 test "x${enable_serial_build_configure}" = xyes &&
3199 for item in ${build_configdirs} ; do
3200   case ${olditem} in
3201     "") ;;
3202     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
3203   esac
3204   olditem=${item}
3205 done
3206 olditem=
3207 test "x${enable_serial_host_configure}" = xyes &&
3208 for item in ${configdirs} ; do
3209   case ${olditem} in
3210     "") ;;
3211     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
3212   esac
3213   olditem=${item}
3214 done
3215 olditem=
3216 test "x${enable_serial_target_configure}" = xyes &&
3217 for item in ${target_configdirs} ; do
3218   case ${olditem} in
3219     "") ;;
3220     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
3221   esac
3222   olditem=${item}
3223 done
3224 serialization_dependencies=serdep.tmp
3225 AC_SUBST_FILE(serialization_dependencies)
3226
3227 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
3228 # target, nonopt, and variable assignments.  These are the ones we
3229 # might not want to pass down to subconfigures.  The exception being
3230 # --cache-file=/dev/null, which is used to turn off the use of cache
3231 # files altogether, and which should be passed on to subconfigures.
3232 # Also strip program-prefix, program-suffix, and program-transform-name,
3233 # so that we can pass down a consistent program-transform-name.
3234 baseargs=
3235 tbaseargs=
3236 keep_next=no
3237 skip_next=no
3238 eval "set -- $ac_configure_args"
3239 for ac_arg
3240 do
3241   if test X"$skip_next" = X"yes"; then
3242     skip_next=no
3243     continue
3244   fi
3245   if test X"$keep_next" = X"yes"; then
3246     case $ac_arg in
3247       *\'*)
3248         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3249     esac
3250     baseargs="$baseargs '$ac_arg'"
3251     tbaseargs="$tbaseargs '$ac_arg'"
3252     keep_next=no
3253     continue
3254   fi
3255
3256   # Handle separated arguments.  Based on the logic generated by
3257   # autoconf 2.59.
3258   case $ac_arg in
3259     *=* | --config-cache | -C | -disable-* | --disable-* \
3260       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3261       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3262       | -with-* | --with-* | -without-* | --without-* | --x)
3263       separate_arg=no
3264       ;;
3265     -*)
3266       separate_arg=yes
3267       ;;
3268     *)
3269       separate_arg=no
3270       ;;
3271   esac
3272
3273   skip_targ=no
3274   case $ac_arg in
3275 changequote(,)
3276   --with-* | --without-*)
3277     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3278
3279     case $libopt in
3280     *[-_]include)
3281       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3282       ;;
3283     *[-_]lib)
3284       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3285       ;;
3286     *)
3287       lib=$libopt
3288       ;;
3289     esac
3290 changequote([,])
3291
3292     case $lib in
3293     mpc | mpfr | gmp | isl)
3294       # If we're processing --with-$lib, --with-$lib-include or
3295       # --with-$lib-lib, for one of the libs above, and target is
3296       # different from host, don't pass the current argument to any
3297       # target library's configure.
3298       if test x$is_cross_compiler = xyes; then
3299         skip_targ=yes
3300       fi
3301       ;;
3302     esac
3303     ;;
3304   esac
3305
3306   case "$ac_arg" in
3307     --cache-file=/dev/null | \
3308     -cache-file=/dev/null )
3309       # Handled here to avoid the test to skip args below.
3310       baseargs="$baseargs '$ac_arg'"
3311       tbaseargs="$tbaseargs '$ac_arg'"
3312       # Assert: $separate_arg should always be no.
3313       keep_next=$separate_arg
3314       ;;
3315     --no*)
3316       continue
3317       ;;
3318     --c* | \
3319     --sr* | \
3320     --ho* | \
3321     --bu* | \
3322     --t* | \
3323     --program-* | \
3324     -cache_file* | \
3325     -srcdir* | \
3326     -host* | \
3327     -build* | \
3328     -target* | \
3329     -program-prefix* | \
3330     -program-suffix* | \
3331     -program-transform-name* )
3332       skip_next=$separate_arg
3333       continue
3334       ;;
3335     -*)
3336       # An option.  Add it.
3337       case $ac_arg in
3338         *\'*)
3339           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3340       esac
3341       baseargs="$baseargs '$ac_arg'"
3342       if test X"$skip_targ" = Xno; then
3343         tbaseargs="$tbaseargs '$ac_arg'"
3344       fi
3345       keep_next=$separate_arg
3346       ;;
3347     *)
3348       # Either a variable assignment, or a nonopt (triplet).  Don't
3349       # pass it down; let the Makefile handle this.
3350       continue
3351       ;;
3352   esac
3353 done
3354 # Remove the initial space we just introduced and, as these will be
3355 # expanded by make, quote '$'.
3356 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3357
3358 # Add in --program-transform-name, after --program-prefix and
3359 # --program-suffix have been applied to it.  Autoconf has already
3360 # doubled dollar signs and backslashes in program_transform_name; we want
3361 # the backslashes un-doubled, and then the entire thing wrapped in single
3362 # quotes, because this will be expanded first by make and then by the shell.
3363 # Also, because we want to override the logic in subdir configure scripts to
3364 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3365 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3366 ${program_transform_name}
3367 EOF_SED
3368 gcc_transform_name=`cat conftestsed.out`
3369 rm -f conftestsed.out
3370 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3371 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3372 if test "$silent" = yes; then
3373   baseargs="$baseargs --silent"
3374   tbaseargs="$tbaseargs --silent"
3375 fi
3376
3377 baseargs="$baseargs --disable-option-checking"
3378 tbaseargs="$tbaseargs --disable-option-checking"
3379
3380 if test "$enable_year2038" = no; then
3381   baseargs="$baseargs --disable-year2038"
3382   tbaseargs="$tbaseargs --disable-year2038"
3383 fi
3384
3385 # Record and document user additions to sub configure arguments.
3386 AC_ARG_VAR([build_configargs],
3387            [additional configure arguments for build directories])
3388 AC_ARG_VAR([host_configargs],
3389            [additional configure arguments for host directories])
3390 AC_ARG_VAR([target_configargs],
3391            [additional configure arguments for target directories])
3392
3393 # For the build-side libraries, we just need to pretend we're native,
3394 # and not use the same cache file.  Multilibs are neither needed nor
3395 # desired.  We can't even use the same cache file for all build-side
3396 # libraries, as they're compiled differently; some with C, some with
3397 # C++ or with different feature-enabling options.
3398 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3399
3400 # For host modules, accept cache file option, or specification as blank.
3401 case "${cache_file}" in
3402 "") # empty
3403   cache_file_option="" ;;
3404 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3405   cache_file_option="--cache-file=${cache_file}" ;;
3406 *) # relative path
3407   cache_file_option="--cache-file=../${cache_file}" ;;
3408 esac
3409
3410 # Host dirs don't like to share a cache file either, horribly enough.
3411 # This seems to be due to autoconf 2.5x stupidity.
3412 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3413
3414 target_configargs="$target_configargs ${tbaseargs}"
3415
3416 # Passing a --with-cross-host argument lets the target libraries know
3417 # whether they are being built with a cross-compiler or being built
3418 # native.  However, it would be better to use other mechanisms to make the
3419 # sorts of decisions they want to make on this basis.  Please consider
3420 # this option to be deprecated.  FIXME.
3421 if test x${is_cross_compiler} = xyes ; then
3422   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3423 fi
3424
3425 # Special user-friendly check for native x86_64-linux build, if
3426 # multilib is not explicitly enabled.
3427 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3428   x86_64-*linux*:yes:$build:$build:)
3429     # Make sure we have a development environment that handles 32-bit
3430     dev64=no
3431     echo "int main () { return 0; }" > conftest.c
3432     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3433     if test $? = 0 ; then
3434       if test -s conftest || test -s conftest.exe ; then
3435         dev64=yes
3436       fi
3437     fi
3438     rm -f conftest*
3439     if test x${dev64} != xyes ; then
3440       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.])
3441     fi
3442     ;;
3443 esac
3444
3445 # Default to --enable-multilib.
3446 if test x${enable_multilib} = x ; then
3447   target_configargs="--enable-multilib ${target_configargs}"
3448 fi
3449
3450 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3451 # changed from the earlier setting of with_newlib.
3452 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3453   target_configargs="--with-newlib ${target_configargs}"
3454 fi
3455
3456 # Different target subdirs use different values of certain variables
3457 # (notably CXX).  Worse, multilibs use *lots* of different values.
3458 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3459 # it doesn't automatically accept command-line overrides of them.
3460 # This means it's not safe for target subdirs to share a cache file,
3461 # which is disgusting, but there you have it.  Hopefully this can be
3462 # fixed in future.  It's still worthwhile to use a cache file for each
3463 # directory.  I think.
3464
3465 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3466 # We need to pass --target, as newer autoconf's requires consistency
3467 # for target_alias and gcc doesn't manage it consistently.
3468 target_configargs="--cache-file=./config.cache ${target_configargs}"
3469
3470 FLAGS_FOR_TARGET=
3471 case " $target_configdirs " in
3472  *" newlib "*)
3473   case " $target_configargs " in
3474   *" --with-newlib "*)
3475    case "$target" in
3476     *-cygwin*)
3477       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3478       ;;
3479    esac
3480
3481    # If we're not building GCC, don't discard standard headers.
3482    if test -d ${srcdir}/gcc; then
3483      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3484
3485      if test "${build}" != "${host}"; then
3486        # On Canadian crosses, CC_FOR_TARGET will have already been set
3487        # by `configure', so we won't have an opportunity to add -Bgcc/
3488        # to it.  This is right: we don't want to search that directory
3489        # for binaries, but we want the header files in there, so add
3490        # them explicitly.
3491        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3492
3493        # Someone might think of using the pre-installed headers on
3494        # Canadian crosses, in case the installed compiler is not fully
3495        # compatible with the compiler being built.  In this case, it
3496        # would be better to flag an error than risking having
3497        # incompatible object files being constructed.  We can't
3498        # guarantee that an error will be flagged, but let's hope the
3499        # compiler will do it, when presented with incompatible header
3500        # files.
3501      fi
3502    fi
3503
3504    case "${target}-${is_cross_compiler}" in
3505    i[[3456789]]86-*-linux*-no)
3506       # Here host == target, so we don't need to build gcc,
3507       # so we don't want to discard standard headers.
3508       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3509       ;;
3510    *)
3511       # If we're building newlib, use its generic headers last, but search
3512       # for any libc-related directories first (so make it the last -B
3513       # switch).
3514       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3515
3516       # If we're building libgloss, find the startup file, simulator library
3517       # and linker script.
3518       case " $target_configdirs " in
3519         *" libgloss "*)
3520         # Look for startup file, simulator library and maybe linker script.
3521         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3522         # Look for libnosys.a in case the target needs it.
3523         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3524         # Most targets have the linker script in the source directory.
3525         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3526         ;;
3527       esac
3528       ;;
3529    esac
3530    ;;
3531   esac
3532   ;;
3533 esac
3534
3535 case "$target" in
3536   x86_64-*mingw* | *-w64-mingw*)
3537   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3538   # however, use a symlink named 'mingw' in ${prefix} .
3539     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3540     ;;
3541   *-mingw*)
3542   # MinGW can't be handled as Cygwin above since it does not use newlib.
3543     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3544     ;;
3545 esac
3546
3547 # Allow the user to override the flags for
3548 # our build compiler if desired.
3549 if test x"${build}" = x"${host}" ; then
3550   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3551   CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
3552   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3553   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3554 fi
3555
3556 # On Canadian crosses, we'll be searching the right directories for
3557 # the previously-installed cross compiler, so don't bother to add
3558 # flags for directories within the install tree of the compiler
3559 # being built; programs in there won't even run.
3560 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3561   # Search for pre-installed headers if nothing else fits.
3562   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3563 fi
3564
3565 if test "x${use_gnu_ld}" = x &&
3566    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3567   # Arrange for us to find uninstalled linker scripts.
3568   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3569 fi
3570
3571 # Search for other target-specific linker scripts and such.
3572 case "${target}" in
3573   mep*)
3574     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3575     ;;
3576   # The VxWorks support for shared libraries is getting in
3577   # incrementally.  Make sure it doesn't get activated implicitly:
3578   *vxworks*)
3579     if test "${enable_shared-unset}" = unset ; then
3580       enable_shared=no
3581       # So the build of libraries knows ...
3582       target_configargs="${target_configargs} --disable-shared"
3583       # So gcc knows ...
3584       host_configargs="${host_configargs} --disable-shared"
3585     fi
3586     ;;
3587 esac
3588
3589 # Makefile fragments.
3590 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3591 do
3592   eval fragval=\$$frag
3593   if test $fragval != /dev/null; then
3594     eval $frag=${srcdir}/$fragval
3595   fi
3596 done
3597 AC_SUBST_FILE(host_makefile_frag)
3598 AC_SUBST_FILE(target_makefile_frag)
3599 AC_SUBST_FILE(alphaieee_frag)
3600 AC_SUBST_FILE(ospace_frag)
3601
3602 # Miscellanea: directories, flags, etc.
3603 AC_SUBST(RPATH_ENVVAR)
3604 AC_SUBST(GCC_SHLIB_SUBDIR)
3605 AC_SUBST(tooldir)
3606 AC_SUBST(build_tooldir)
3607 AC_SUBST(CONFIGURE_GDB_TK)
3608 AC_SUBST(GDB_TK)
3609 AC_SUBST(INSTALL_GDB_TK)
3610
3611 # Build module lists & subconfigure args.
3612 AC_SUBST(build_configargs)
3613 AC_SUBST(build_configdirs)
3614
3615 # Host module lists & subconfigure args.
3616 AC_SUBST(host_configargs)
3617 AC_SUBST(configdirs)
3618 AC_SUBST(target_configdirs)
3619
3620 # Target module lists & subconfigure args.
3621 AC_SUBST(target_configargs)
3622
3623
3624 # Build tools.
3625 AC_SUBST(AR_FOR_BUILD)
3626 AC_SUBST(AS_FOR_BUILD)
3627 AC_SUBST(CC_FOR_BUILD)
3628 AC_SUBST(CFLAGS_FOR_BUILD)
3629 AC_SUBST(CPP_FOR_BUILD)
3630 AC_SUBST(CPPFLAGS_FOR_BUILD)
3631 AC_SUBST(CXXFLAGS_FOR_BUILD)
3632 AC_SUBST(CXX_FOR_BUILD)
3633 AC_SUBST(DLLTOOL_FOR_BUILD)
3634 AC_SUBST(DSYMUTIL_FOR_BUILD)
3635 AC_SUBST(GFORTRAN_FOR_BUILD)
3636 AC_SUBST(GOC_FOR_BUILD)
3637 AC_SUBST(GDC_FOR_BUILD)
3638 AC_SUBST(LDFLAGS_FOR_BUILD)
3639 AC_SUBST(LD_FOR_BUILD)
3640 AC_SUBST(NM_FOR_BUILD)
3641 AC_SUBST(RANLIB_FOR_BUILD)
3642 AC_SUBST(WINDMC_FOR_BUILD)
3643 AC_SUBST(WINDRES_FOR_BUILD)
3644
3645 # Generate default definitions for YACC, M4, LEX and other programs that run
3646 # on the build machine.  These are used if the Makefile can't locate these
3647 # programs in objdir.
3648 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3649
3650 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3651 case " $build_configdirs " in
3652   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3653 esac
3654
3655 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3656 case " $build_configdirs " in
3657   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3658 esac
3659
3660 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3661 case " $build_configdirs " in
3662   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3663 esac
3664
3665 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3666 case " $build_configdirs " in
3667   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3668   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3669 esac
3670
3671 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3672 case " $build_configdirs " in
3673   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3674 esac
3675
3676 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3677 case " $build_configdirs " in
3678   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3679   *)
3680 changequote(,)
3681     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3682     # higher, else we use the "missing" dummy.
3683     if ${MAKEINFO} --version \
3684        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3685       :
3686     else
3687       MAKEINFO="$MISSING makeinfo"
3688     fi
3689     ;;
3690 changequote([,])
3691 esac
3692
3693 # FIXME: expect and dejagnu may become build tools?
3694
3695 AC_CHECK_PROGS(EXPECT, expect, expect)
3696 case " $configdirs " in
3697   *" expect "*)
3698     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3699     ;;
3700 esac
3701
3702 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3703 case " $configdirs " in
3704   *" dejagnu "*)
3705     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3706     ;;
3707 esac
3708
3709
3710 # Host tools.
3711 NCN_STRICT_CHECK_TOOLS(AR, ar)
3712 NCN_STRICT_CHECK_TOOLS(AS, as)
3713 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3714 NCN_STRICT_CHECK_TOOLS(DSYMUTIL, dsymutil)
3715 NCN_STRICT_CHECK_TOOLS(LD, ld)
3716 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3717 NCN_STRICT_CHECK_TOOLS(NM, nm)
3718 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3719 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3720 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3721 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3722 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3723 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3724 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3725 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3726 AC_SUBST(CC)
3727 AC_SUBST(CXX)
3728 AC_SUBST(CFLAGS)
3729 AC_SUBST(CXXFLAGS)
3730 AC_SUBST(GDC)
3731 AC_SUBST(GDCFLAGS)
3732 GDCFLAGS=${GDCFLAGS-${CFLAGS}}
3733 AC_SUBST(PKG_CONFIG_PATH)
3734
3735 GCC_PLUGIN_OPTION(PLUGIN_OPTION)
3736 AR_PLUGIN_OPTION=
3737 RANLIB_PLUGIN_OPTION=
3738 if test -n "$PLUGIN_OPTION"; then
3739   if $AR --help 2>&1 | grep -q "\--plugin"; then
3740     AR_PLUGIN_OPTION="$PLUGIN_OPTION"
3741   fi
3742   if $RANLIB --help 2>&1 | grep -q "\--plugin"; then
3743     RANLIB_PLUGIN_OPTION="$PLUGIN_OPTION"
3744   fi
3745 fi
3746 AC_SUBST(AR_PLUGIN_OPTION)
3747 AC_SUBST(RANLIB_PLUGIN_OPTION)
3748
3749 # Target tools.
3750 AC_ARG_WITH([build-time-tools],
3751   [AS_HELP_STRING([--with-build-time-tools=PATH],
3752                   [use given path to find target tools during the build])],
3753   [case x"$withval" in
3754      x/*) ;;
3755      *)
3756        with_build_time_tools=
3757        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3758        ;;
3759    esac],
3760   [with_build_time_tools=])
3761
3762 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3763 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3764 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3765 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3766 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3767 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3768 NCN_STRICT_CHECK_TARGET_TOOLS(GM2_FOR_TARGET, gm2)
3769
3770 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3771 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3772 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3773 ACX_CHECK_INSTALLED_TARGET_TOOL(DSYMUTIL_FOR_TARGET, dsymutil)
3774 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3775 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3776 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3777 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3778 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3779 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3780 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3781 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3782 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3783 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3784 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3785
3786 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3787
3788 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3789 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3790 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3791 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3792 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3793                 [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],
3794                 c++)
3795 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3796                 [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],
3797                 c++)
3798 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3799 GCC_TARGET_TOOL(dsymutil, DSYMUTIL_FOR_TARGET, DSYMUTIL)
3800 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3801 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3802                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3803 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3804                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3805 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3806                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3807 GCC_TARGET_TOOL(gm2, GM2_FOR_TARGET, GM2,
3808                 [gcc/gm2 -B$$r/$(HOST_SUBDIR)/gcc/], m2)
3809 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3810 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3811 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3812 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3813 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3814 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3815 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3816 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3817 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3818 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3819 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3820
3821 AC_SUBST(FLAGS_FOR_TARGET)
3822 AC_SUBST(RAW_CXX_FOR_TARGET)
3823
3824 # Certain tools may need extra flags.
3825 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3826 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3827 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3828
3829 # When building target libraries, except in a Canadian cross, we use
3830 # the same toolchain as the compiler we just built.
3831 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3832 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3833 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3834 if test $host = $build; then
3835   case " $configdirs " in
3836     *" gcc "*)
3837       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3838       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3839       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3840       ;;
3841   esac
3842 fi
3843
3844 AC_SUBST(COMPILER_AS_FOR_TARGET)
3845 AC_SUBST(COMPILER_LD_FOR_TARGET)
3846 AC_SUBST(COMPILER_NM_FOR_TARGET)
3847
3848 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3849 AC_ARG_ENABLE(maintainer-mode,
3850 [AS_HELP_STRING([--enable-maintainer-mode],
3851                 [enable make rules and dependencies not useful
3852                  (and sometimes confusing) to the casual installer])],
3853       USE_MAINTAINER_MODE=$enableval,
3854       USE_MAINTAINER_MODE=no)
3855 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3856 AC_SUBST(MAINTAINER_MODE_TRUE)
3857 AC_SUBST(MAINTAINER_MODE_FALSE)
3858 if test "$USE_MAINTAINER_MODE" = yes; then
3859   MAINTAINER_MODE_TRUE=
3860   MAINTAINER_MODE_FALSE='#'
3861 else
3862   MAINTAINER_MODE_TRUE='#'
3863   MAINTAINER_MODE_FALSE=
3864 fi
3865 MAINT=$MAINTAINER_MODE_TRUE
3866 AC_SUBST(MAINT)dnl
3867
3868 # ---------------------
3869 # GCC bootstrap support
3870 # ---------------------
3871
3872 # Stage specific cflags for build.
3873 stage1_cflags="-g"
3874 case $build in
3875   vax-*-*)
3876     case ${GCC} in
3877       yes) stage1_cflags="-g -Wa,-J" ;;
3878       *) stage1_cflags="-g -J" ;;
3879     esac ;;
3880 esac
3881
3882 AC_SUBST(stage1_cflags)
3883
3884 # Enable --enable-checking in stage1 of the compiler.
3885 AC_ARG_ENABLE(stage1-checking,
3886 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3887                 [choose additional checking for stage1 of the compiler])],
3888 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3889 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3890   # For --disable-checking or implicit --enable-checking=release, avoid
3891   # setting --enable-checking=gc in the default stage1 checking for LTO
3892   # bootstraps.  See PR62077.
3893   case $BUILD_CONFIG in
3894     *lto*)
3895       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3896     *)
3897       stage1_checking=--enable-checking=yes,types;;
3898   esac
3899   if test "x$enable_checking" = x && \
3900      test -d ${srcdir}/gcc && \
3901      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3902     stage1_checking=--enable-checking=yes,types,extra
3903   fi
3904 else
3905   stage1_checking=--enable-checking=$enable_checking,types
3906 fi])
3907 AC_SUBST(stage1_checking)
3908
3909 # Enable -Werror in bootstrap stage2 and later.
3910 AC_ARG_ENABLE(werror,
3911 [AS_HELP_STRING([--enable-werror],
3912                 [enable -Werror in bootstrap stage2 and later])],
3913 [
3914 case ${enable_werror} in
3915   yes) stage2_werror_flag="--enable-werror-always" ;;
3916   *) stage2_werror_flag="" ;;
3917 esac
3918 ],
3919 [
3920 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3921   case $BUILD_CONFIG in
3922   bootstrap-debug)
3923       stage2_werror_flag="--enable-werror-always" ;;
3924   "")
3925       stage2_werror_flag="--enable-werror-always" ;;
3926   esac
3927 fi
3928 ])
3929
3930 AC_SUBST(stage2_werror_flag)
3931
3932 # Specify what files to not compare during bootstrap.
3933
3934 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3935 compare_exclusions="$compare_exclusions | gcc/m2/gm2-compiler-boot/M2Version*"
3936 compare_exclusions="$compare_exclusions | gcc/m2/gm2-compiler-boot/SYSTEM*"
3937 compare_exclusions="$compare_exclusions | gcc/m2/gm2version*"
3938 case "$target" in
3939   hppa*64*-*-hpux*) ;;
3940   powerpc*-ibm-aix*) compare_exclusions="$compare_exclusions | *libgomp*\$(objext)" ;;
3941 esac
3942 AC_SUBST(compare_exclusions)
3943
3944 AC_CONFIG_FILES([Makefile],
3945   [sed "$extrasub_build" Makefile |
3946    sed "$extrasub_host" |
3947    sed "$extrasub_target" > mf$$
3948    mv -f mf$$ Makefile],
3949   [extrasub_build="$extrasub_build"
3950    extrasub_host="$extrasub_host"
3951    extrasub_target="$extrasub_target"])
3952 AC_OUTPUT