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([libtool.m4])
  28 m4_include([ltoptions.m4])
  29 m4_include([ltsugar.m4])
  30 m4_include([ltversion.m4])
  31 m4_include([lt~obsolete.m4])
  32 m4_include([config/isl.m4])
  33
  34 AC_INIT(move-if-change)
  35 AC_DISABLE_OPTION_CHECKING
  36
  37 progname=$0
  38 # if PWD already has a value, it is probably wrong.
  39 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  40
  41 # Export original configure arguments for use by sub-configures.
  42 # Quote arguments with shell meta charatcers.
  43 TOPLEVEL_CONFIGURE_ARGUMENTS=
  44 set -- "$progname" "$@"
  45 for ac_arg
  46 do
  47   case "$ac_arg" in
  48   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  49     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  50     # if the argument is of the form -foo=baz, quote the baz part only
  51     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  52   *) ;;
  53   esac
  54   # Add the quoted argument to the list.
  55   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  56 done
  57 if test "$silent" = yes; then
  58   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  59 fi
  60 # Remove the initial space we just introduced and, as these will be
  61 # expanded by make, quote '$'.
  62 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  63 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  64
  65 # Find the build, host, and target systems.
  66 ACX_NONCANONICAL_BUILD
  67 ACX_NONCANONICAL_HOST
  68 ACX_NONCANONICAL_TARGET
  69
  70 dnl Autoconf 2.5x and later will set a default program prefix if
  71 dnl --target was used, even if it was the same as --host.  Disable
  72 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  73 dnl to take effect.
  74 test "$host_noncanonical" = "$target_noncanonical" &&
  75   test "$program_prefix$program_suffix$program_transform_name" = \
  76     NONENONEs,x,x, &&
  77   program_transform_name=s,y,y,
  78
  79 AC_CANONICAL_SYSTEM
  80 AC_ARG_PROGRAM
  81
  82 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  83 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  84
  85 # Get 'install' or 'install-sh' and its variants.
  86 AC_PROG_INSTALL
  87 ACX_PROG_LN
  88 AC_PROG_LN_S
  89 AC_PROG_SED
  90 AC_PROG_AWK
  91
  92 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  93
  94 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  95 # a relative path.
  96 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  97   INSTALL="${srcpwd}/install-sh -c"
  98 fi
  99
 100 # Set srcdir to "." if that's what it is.
 101 # This is important for multilib support.
 102 pwd=`${PWDCMD-pwd}`
 103 if test "${pwd}" = "${srcpwd}" ; then
 104   srcdir=.
 105 fi
 106
 107 topsrcdir=$srcpwd
 108
 109 extra_host_args=
 110
 111 ### To add a new directory to the tree, first choose whether it is a target
 112 ### or a host dependent tool.  Then put it into the appropriate list
 113 ### (library or tools, host or target), doing a dependency sort.
 114
 115 # Subdirs will be configured in the order listed in build_configdirs,
 116 # configdirs, or target_configdirs; see the serialization section below.
 117
 118 # Dependency sorting is only needed when *configuration* must be done in
 119 # a particular order.  In all cases a dependency should be specified in
 120 # the Makefile, whether or not it's implicitly specified here.
 121
 122 # Double entries in build_configdirs, configdirs, or target_configdirs may
 123 # cause circular dependencies and break everything horribly.
 124
 125 # these library is used by various programs built for the build
 126 # environment
 127 #
 128 build_libs="build-libiberty build-libcpp"
 129
 130 # these tools are built for the build environment
 131 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 132
 133 # these libraries are used by various programs built for the host environment
 134 #f
 135 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libcody libdecnumber gmp mpfr mpc isl libiconv libctf libsframe"
 136
 137 # these tools are built for the host environment
 138 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 139 # know that we are building the simulator.
 140 # binutils, gas and ld appear in that order because it makes sense to run
 141 # "make check" in that particular order.
 142 # If --enable-gold is used, "gold" may replace "ld".
 143 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gdbserver gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gm2tools gotools c++tools"
 144
 145 # these libraries are built for the target environment, and are built after
 146 # the host libraries and the host tools (which may be a cross compiler)
 147 # Note that libiberty is not a target library.
 148 target_libraries="target-libgcc \
 149                 target-libbacktrace \
 150                 target-libgloss \
 151                 target-newlib \
 152                 target-libgomp \
 153                 target-libatomic \
 154                 target-libitm \
 155                 target-libstdc++-v3 \
 156                 target-libsanitizer \
 157                 target-libvtv \
 158                 target-libssp \
 159                 target-libquadmath \
 160                 target-libgfortran \
 161                 target-libffi \
 162                 target-libobjc \
 163                 target-libada \
 164                 target-libgm2 \
 165                 target-libgo \
 166                 target-libphobos \
 167                 target-zlib"
 168
 169 # these tools are built using the target libraries, and are intended to
 170 # run only in the target environment
 171 #
 172 # note: any program that *uses* libraries that are in the "target_libraries"
 173 # list belongs in this list.
 174 #
 175 target_tools="target-rda"
 176
 177 ################################################################################
 178
 179 ## All tools belong in one of the four categories, and are assigned above
 180 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 181 ## is important because configure will choke if they ever get through.
 182 ## ${configdirs} is directories we build using the host tools.
 183 ## ${target_configdirs} is directories we build using the target tools.
 184 configdirs=`echo ${host_libs} ${host_tools}`
 185 target_configdirs=`echo ${target_libraries} ${target_tools}`
 186 build_configdirs=`echo ${build_libs} ${build_tools}`
 187
 188 m4_divert_text([PARSE_ARGS],
 189 [case $srcdir in
 190   *" "*)
 191 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 192     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 193 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 194     ;;
 195 esac
 196 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 197 ])
 198
 199 ################################################################################
 200
 201 srcname="gnu development package"
 202
 203 # This gets set non-empty for some net releases of packages.
 204 appdirs=""
 205
 206 # Define is_cross_compiler to save on calls to 'test'.
 207 is_cross_compiler=
 208 if test x"${host}" = x"${target}" ; then
 209   is_cross_compiler=no
 210 else
 211   is_cross_compiler=yes
 212 fi
 213
 214 # Find the build and target subdir names.
 215 GCC_TOPLEV_SUBDIRS
 216 # Be sure to cover against remnants of an in-tree build.
 217 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 218   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 219 Use a pristine source tree when building in a separate tree])
 220 fi
 221
 222 # Skipdirs are removed silently.
 223 skipdirs=
 224 # Noconfigdirs are removed loudly.
 225 noconfigdirs=""
 226
 227 use_gnu_ld=
 228 # Make sure we don't let GNU ld be added if we didn't want it.
 229 if test x$with_gnu_ld = xno ; then
 230   use_gnu_ld=no
 231   noconfigdirs="$noconfigdirs ld gold"
 232 fi
 233
 234 use_gnu_as=
 235 # Make sure we don't let GNU as be added if we didn't want it.
 236 if test x$with_gnu_as = xno ; then
 237   use_gnu_as=no
 238   noconfigdirs="$noconfigdirs gas"
 239 fi
 240
 241 use_included_zlib=
 242 AC_ARG_WITH(system-zlib,
 243 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 244 # Make sure we don't let ZLIB be added if we didn't want it.
 245 if test x$with_system_zlib = xyes ; then
 246   use_included_zlib=no
 247   noconfigdirs="$noconfigdirs zlib"
 248 fi
 249
 250 # Don't compile the bundled readline/libreadline.a if --with-system-readline
 251 # is provided.
 252 if test x$with_system_readline = xyes ; then
 253   noconfigdirs="$noconfigdirs readline"
 254 fi
 255
 256 # some tools are so dependent upon X11 that if we're not building with X,
 257 # it's not even worth trying to configure, much less build, that tool.
 258
 259 case ${with_x} in
 260   yes | "") ;; # the default value for this tree is that X11 is available
 261   no)
 262     skipdirs="${skipdirs} tk itcl libgui"
 263     # We won't be able to build gdbtk without X.
 264     enable_gdbtk=no
 265     ;;
 266   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 267 esac
 268
 269 # Some are only suitable for cross toolchains.
 270 # Remove these if host=target.
 271 cross_only="target-libgloss target-newlib target-opcodes"
 272
 273 case $is_cross_compiler in
 274   no) skipdirs="${skipdirs} ${cross_only}" ;;
 275 esac
 276
 277 # If both --with-headers and --with-libs are specified, default to
 278 # --without-newlib.
 279 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 280    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 281   if test x"${with_newlib}" = x ; then
 282     with_newlib=no
 283   fi
 284 fi
 285
 286 # Recognize --with-newlib/--without-newlib.
 287 case ${with_newlib} in
 288   no) skipdirs="${skipdirs} target-newlib" ;;
 289   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 290 esac
 291
 292 AC_ARG_ENABLE(as-accelerator-for,
 293 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 294                 [build as offload target compiler.
 295                 Specify offload host triple by ARG])])
 296
 297 AC_ARG_ENABLE(offload-targets,
 298 [AS_HELP_STRING([--enable-offload-targets=LIST],
 299                 [enable offloading to devices from comma-separated LIST of
 300                 TARGET[=DIR]. Use optional path to find offload target compiler
 301                 during the build])],
 302 [
 303   if test x"$enable_offload_targets" = x; then
 304     AC_MSG_ERROR([no offload targets specified])
 305   fi
 306 ], [enable_offload_targets=])
 307
 308 AC_ARG_ENABLE(offload-defaulted,
 309 [AS_HELP_STRING([--enable-offload-defaulted]
 310                 [If enabled, configured but not installed offload compilers and
 311                 libgomp plugins are silently ignored.  Useful for distribution
 312                 compilers where those are in separate optional packages.])],
 313 [enable_offload_defaulted=$enableval],
 314 [enable_offload_defaulted=])
 315
 316 # Handle --enable-gold, --enable-ld.
 317 # --disable-gold [--enable-ld]
 318 #     Build only ld.  Default option.
 319 # --enable-gold [--enable-ld]
 320 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 321 #     as "ld.bfd" and "ld".
 322 # --enable-gold=default [--enable-ld]
 323 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 324 #     install ld as "ld.bfd".
 325 # --enable-gold[=default] --disable-ld
 326 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 327 # --enable-gold --enable-ld=default
 328 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 329 #     and ld.bfd).
 330 #     In other words, ld is default
 331 # --enable-gold=default --enable-ld=default
 332 #     Error.
 333
 334 default_ld=
 335 AC_ARG_ENABLE(gold,
 336 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 337                 [build gold @<:@ARG={default,yes,no}@:>@])],
 338 ENABLE_GOLD=$enableval,
 339 ENABLE_GOLD=no)
 340 case "${ENABLE_GOLD}" in
 341   yes|default)
 342     # Check for ELF target.
 343     is_elf=no
 344     case "${target}" in
 345       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 346       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 347       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 348       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 349         case "${target}" in
 350           *-*-linux*aout* | *-*-linux*oldld*)
 351             ;;
 352           *)
 353             is_elf=yes
 354             ;;
 355         esac
 356     esac
 357
 358     if test "$is_elf" = "yes"; then
 359       # Check for target supported by gold.
 360       case "${target}" in
 361         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 362         | aarch64*-*-* | mips*-*-* | s390*-*-* | loongarch*-*-*)
 363           configdirs="$configdirs gold"
 364           if test x${ENABLE_GOLD} = xdefault; then
 365             default_ld=gold
 366           fi
 367           ENABLE_GOLD=yes
 368           ;;
 369       esac
 370     fi
 371     ;;
 372   no)
 373     ;;
 374   *)
 375     AC_MSG_ERROR([invalid --enable-gold argument])
 376     ;;
 377 esac
 378
 379 AC_ARG_ENABLE(ld,
 380 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 381                 [build ld @<:@ARG={default,yes,no}@:>@])],
 382 ENABLE_LD=$enableval,
 383 ENABLE_LD=yes)
 384
 385 case "${ENABLE_LD}" in
 386   default)
 387     if test x${default_ld} != x; then
 388       AC_MSG_ERROR([either gold or ld can be the default ld])
 389     fi
 390     ;;
 391   yes)
 392     ;;
 393   no)
 394     if test x${ENABLE_GOLD} != xyes; then
 395       AC_MSG_WARN([neither ld nor gold are enabled])
 396     fi
 397     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 398     ;;
 399   *)
 400     AC_MSG_ERROR([invalid --enable-ld argument])
 401     ;;
 402 esac
 403
 404 # PR gas/19109
 405 # Decide the default method for compressing debug sections.
 406 # Provide a configure time option to override our default.
 407 AC_ARG_ENABLE(compressed_debug_sections,
 408 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 409                 [Enable compressed debug sections for gas, gold or ld by
 410                  default])],
 411 [
 412   if test x"$enable_compressed_debug_sections" = xyes; then
 413     AC_MSG_ERROR([no program with compressed debug sections specified])
 414   fi
 415 ], [enable_compressed_debug_sections=])
 416
 417 # Configure extra directories which are host specific
 418
 419 case "${host}" in
 420   *-cygwin*)
 421     configdirs="$configdirs libtermcap" ;;
 422 esac
 423
 424 # A target can indicate whether a language isn't supported for some reason.
 425 # Only spaces may be used in this macro; not newlines or tabs.
 426 unsupported_languages=
 427
 428 # Remove more programs from consideration, based on the host or
 429 # target this usually means that a port of the program doesn't
 430 # exist yet.
 431
 432 case "${host}" in
 433   i[[3456789]]86-*-msdosdjgpp*)
 434     noconfigdirs="$noconfigdirs tcl tk itcl"
 435     ;;
 436 esac
 437
 438
 439 AC_ARG_ENABLE(libquadmath,
 440 AS_HELP_STRING([--disable-libquadmath],
 441   [do not build libquadmath directory]),
 442 ENABLE_LIBQUADMATH=$enableval,
 443 ENABLE_LIBQUADMATH=yes)
 444 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 445   noconfigdirs="$noconfigdirs target-libquadmath"
 446 fi
 447
 448
 449 AC_ARG_ENABLE(libquadmath-support,
 450 AS_HELP_STRING([--disable-libquadmath-support],
 451   [disable libquadmath support for Fortran]),
 452 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 453 ENABLE_LIBQUADMATH_SUPPORT=yes)
 454 enable_libquadmath_support=
 455 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 456   enable_libquadmath_support=no
 457 fi
 458
 459
 460 AC_ARG_ENABLE(libada,
 461 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 462 ENABLE_LIBADA=$enableval,
 463 ENABLE_LIBADA=yes)
 464 if test "${ENABLE_LIBADA}" != "yes" ; then
 465   noconfigdirs="$noconfigdirs gnattools"
 466 fi
 467
 468 AC_ARG_ENABLE(libgm2,
 469 [AS_HELP_STRING([--enable-libgm2], [build libgm2 directory])],
 470 ENABLE_LIBGM2=$enableval,
 471 ENABLE_LIBGM2=no)
 472 if test "${ENABLE_LIBGM2}" != "yes" ; then
 473   noconfigdirs="$noconfigdirs gm2tools"
 474 fi
 475
 476 AC_ARG_ENABLE(libssp,
 477 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 478 ENABLE_LIBSSP=$enableval,
 479 ENABLE_LIBSSP=yes)
 480
 481 AC_ARG_ENABLE(libstdcxx,
 482 AS_HELP_STRING([--disable-libstdcxx],
 483   [do not build libstdc++-v3 directory]),
 484 ENABLE_LIBSTDCXX=$enableval,
 485 ENABLE_LIBSTDCXX=default)
 486 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 487   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 488 fi]
 489
 490 # Enable libgomp by default on hosted POSIX systems, and a few others.
 491 if test x$enable_libgomp = x ; then
 492     case "${target}" in
 493     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 494         ;;
 495     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 496         ;;
 497     *-*-solaris2* | *-*-hpux11*)
 498         ;;
 499     *-*-darwin* | *-*-aix*)
 500         ;;
 501     nvptx*-*-* | amdgcn*-*-*)
 502         ;;
 503     *)
 504         noconfigdirs="$noconfigdirs target-libgomp"
 505         ;;
 506     esac
 507 fi
 508
 509 # Disable libatomic on unsupported systems.
 510 if test -d ${srcdir}/libatomic; then
 511     if test x$enable_libatomic = x; then
 512         AC_MSG_CHECKING([for libatomic support])
 513         if (srcdir=${srcdir}/libatomic; \
 514                 . ${srcdir}/configure.tgt; \
 515                 test -n "$UNSUPPORTED")
 516         then
 517             AC_MSG_RESULT([no])
 518             noconfigdirs="$noconfigdirs target-libatomic"
 519         else
 520             AC_MSG_RESULT([yes])
 521         fi
 522     fi
 523 fi
 524
 525 # Disable libitm on unsupported systems.
 526 if test -d ${srcdir}/libitm; then
 527     if test x$enable_libitm = x; then
 528         AC_MSG_CHECKING([for libitm support])
 529         if (srcdir=${srcdir}/libitm; \
 530                 . ${srcdir}/configure.tgt; \
 531                 test -n "$UNSUPPORTED")
 532         then
 533             AC_MSG_RESULT([no])
 534             noconfigdirs="$noconfigdirs target-libitm"
 535         else
 536             AC_MSG_RESULT([yes])
 537         fi
 538     fi
 539 fi
 540
 541 # Disable libsanitizer on unsupported systems.
 542 if test -d ${srcdir}/libsanitizer; then
 543     if test x$enable_libsanitizer = x; then
 544         AC_MSG_CHECKING([for libsanitizer support])
 545         if (srcdir=${srcdir}/libsanitizer; \
 546                 . ${srcdir}/configure.tgt; \
 547                 test -n "$UNSUPPORTED")
 548         then
 549             AC_MSG_RESULT([no])
 550             noconfigdirs="$noconfigdirs target-libsanitizer"
 551         else
 552             AC_MSG_RESULT([yes])
 553         fi
 554     fi
 555 fi
 556
 557 # Disable libvtv on unsupported systems.
 558 if test -d ${srcdir}/libvtv; then
 559     if test x$enable_libvtv = x; then
 560         AC_MSG_CHECKING([for libvtv support])
 561         if (srcdir=${srcdir}/libvtv; \
 562                 . ${srcdir}/configure.tgt; \
 563                 test "$VTV_SUPPORTED" != "yes")
 564         then
 565             AC_MSG_RESULT([no])
 566             noconfigdirs="$noconfigdirs target-libvtv"
 567         else
 568             AC_MSG_RESULT([yes])
 569         fi
 570     fi
 571 fi
 572
 573 # Disable libquadmath for some systems.
 574 case "${target}" in
 575   avr-*-*)
 576     noconfigdirs="$noconfigdirs target-libquadmath"
 577     ;;
 578   # libquadmath is unused on AIX and libquadmath build process use of
 579   # LD_LIBRARY_PATH can break AIX bootstrap.
 580   powerpc-*-aix* | rs6000-*-aix*)
 581     noconfigdirs="$noconfigdirs target-libquadmath"
 582     ;;
 583 esac
 584
 585 # Disable libssp for some systems.
 586 case "${target}" in
 587   avr-*-*)
 588     # No hosted I/O support.
 589     noconfigdirs="$noconfigdirs target-libssp"
 590     ;;
 591   bpf-*-*)
 592     noconfigdirs="$noconfigdirs target-libssp"
 593     ;;
 594   powerpc-*-aix* | rs6000-*-aix*)
 595     noconfigdirs="$noconfigdirs target-libssp"
 596     ;;
 597   pru-*-*)
 598     # No hosted I/O support.
 599     noconfigdirs="$noconfigdirs target-libssp"
 600     ;;
 601   rl78-*-*)
 602     # libssp uses a misaligned load to trigger a fault, but the RL78
 603     # doesn't fault for those - instead, it gives a build-time error
 604     # for explicit misaligned loads.
 605     noconfigdirs="$noconfigdirs target-libssp"
 606     ;;
 607   visium-*-*)
 608     # No hosted I/O support.
 609     noconfigdirs="$noconfigdirs target-libssp"
 610     ;;
 611 esac
 612
 613 # Disable libstdc++-v3 for some systems.
 614 # Allow user to override this if they pass --enable-libstdcxx
 615 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 616   case "${target}" in
 617     *-*-vxworks*)
 618       # VxWorks uses the Dinkumware C++ library.
 619       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 620       ;;
 621     amdgcn*-*-*)
 622       # Not ported/fails to build when using newlib.
 623       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 624       ;;
 625     arm*-wince-pe*)
 626       # the C++ libraries don't build on top of CE's C libraries
 627       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 628       ;;
 629     avr-*-*)
 630       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 631       ;;
 632     bpf-*-*)
 633       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 634       ;;
 635     ft32-*-*)
 636       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 637       ;;
 638   esac
 639 fi
 640
 641 # Disable C++ on systems where it is known to not work.
 642 # For testing, you can override this with --enable-languages=c++.
 643 case ,${enable_languages}, in
 644   *,c++,*)
 645     ;;
 646   *)
 647       case "${target}" in
 648         bpf-*-*)
 649           unsupported_languages="$unsupported_languages c++"
 650           ;;
 651       esac
 652       ;;
 653 esac
 654
 655 # Disable Objc on systems where it is known to not work.
 656 # For testing, you can override this with --enable-languages=objc.
 657 case ,${enable_languages}, in
 658   *,objc,*)
 659     ;;
 660   *)
 661       case "${target}" in
 662         bpf-*-*)
 663           unsupported_languages="$unsupported_languages objc"
 664           ;;
 665       esac
 666       ;;
 667 esac
 668
 669 # Disable D on systems where it is known to not work.
 670 # For testing, you can override this with --enable-languages=d.
 671 case ,${enable_languages}, in
 672   *,d,*)
 673     ;;
 674   *)
 675     case "${target}" in
 676       bpf-*-*)
 677         unsupported_languages="$unsupported_languages d"
 678         ;;
 679     esac
 680     ;;
 681 esac
 682
 683 # Disable libphobos on unsupported systems.
 684 # For testing, you can override this with --enable-libphobos.
 685 if test -d ${srcdir}/libphobos; then
 686     if test x$enable_libphobos = x; then
 687         AC_MSG_CHECKING([for libphobos support])
 688         if (srcdir=${srcdir}/libphobos; \
 689                 . ${srcdir}/configure.tgt; \
 690                 test "$LIBPHOBOS_SUPPORTED" != "yes")
 691         then
 692             AC_MSG_RESULT([no])
 693             noconfigdirs="$noconfigdirs target-libphobos"
 694         else
 695             AC_MSG_RESULT([yes])
 696         fi
 697     fi
 698 fi
 699
 700 # Disable Fortran for some systems.
 701 case "${target}" in
 702   mmix-*-*)
 703     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 704     unsupported_languages="$unsupported_languages fortran"
 705     ;;
 706   bpf-*-*)
 707     unsupported_languages="$unsupported_languages fortran"
 708     ;;
 709 esac
 710
 711 # Disable libffi for some systems.
 712 case "${target}" in
 713   powerpc-*-darwin*)
 714     ;;
 715   i[[3456789]]86-*-darwin*)
 716     ;;
 717   x86_64-*-darwin[[912]]*)
 718     ;;
 719   *-*-darwin*)
 720     noconfigdirs="$noconfigdirs target-libffi"
 721     ;;
 722   *-*-netware*)
 723     noconfigdirs="$noconfigdirs target-libffi"
 724     ;;
 725   *-*-phoenix*)
 726     noconfigdirs="$noconfigdirs target-libffi"
 727     ;;
 728   *-*-rtems*)
 729     noconfigdirs="$noconfigdirs target-libffi"
 730     ;;
 731   *-*-tpf*)
 732     noconfigdirs="$noconfigdirs target-libffi"
 733     ;;
 734   *-*-uclinux*)
 735     noconfigdirs="$noconfigdirs target-libffi"
 736     ;;
 737   *-*-vxworks*)
 738     noconfigdirs="$noconfigdirs target-libffi"
 739     ;;
 740   aarch64*-*-freebsd*)
 741     noconfigdirs="$noconfigdirs target-libffi"
 742     ;;
 743   alpha*-*-*vms*)
 744     noconfigdirs="$noconfigdirs target-libffi"
 745     ;;
 746   arm*-*-freebsd*)
 747     noconfigdirs="$noconfigdirs target-libffi"
 748     ;;
 749   arm-wince-pe)
 750     noconfigdirs="$noconfigdirs target-libffi"
 751     ;;
 752   arm*-*-symbianelf*)
 753     noconfigdirs="$noconfigdirs target-libffi"
 754     ;;
 755   bpf-*-*)
 756     noconfigdirs="$noconfigdirs target-libffi"
 757     ;;
 758   cris-*-* | crisv32-*-*)
 759     case "${target}" in
 760       *-*-linux*)
 761         ;;
 762       *) # See PR46792 regarding target-libffi.
 763         noconfigdirs="$noconfigdirs target-libffi";;
 764     esac
 765     ;;
 766   hppa*64*-*-hpux*)
 767     noconfigdirs="$noconfigdirs target-libffi"
 768     ;;
 769   ia64*-*-*vms*)
 770     noconfigdirs="$noconfigdirs target-libffi"
 771     ;;
 772   i[[3456789]]86-w64-mingw*)
 773     noconfigdirs="$noconfigdirs target-libffi"
 774     ;;
 775   i[[3456789]]86-*-mingw*)
 776     noconfigdirs="$noconfigdirs target-libffi"
 777     ;;
 778   x86_64-*-mingw*)
 779     noconfigdirs="$noconfigdirs target-libffi"
 780     ;;
 781   mmix-*-*)
 782     noconfigdirs="$noconfigdirs target-libffi"
 783     ;;
 784   powerpc-*-aix*)
 785     ;;
 786   rs6000-*-aix*)
 787     ;;
 788   ft32-*-*)
 789     noconfigdirs="$noconfigdirs target-libffi"
 790     ;;
 791   *-*-lynxos*)
 792     noconfigdirs="$noconfigdirs target-libffi"
 793     ;;
 794 esac
 795
 796 # Disable the go frontend on systems where it is known to not work. Please keep
 797 # this in sync with contrib/config-list.mk.
 798 case "${target}" in
 799 *-*-darwin* | *-*-cygwin* | *-*-mingw* | bpf-* )
 800     unsupported_languages="$unsupported_languages go"
 801     ;;
 802 esac
 803
 804 # Only allow gdbserver on some systems.
 805 if test -d ${srcdir}/gdbserver; then
 806     if test x$enable_gdbserver = x; then
 807         AC_MSG_CHECKING([for gdbserver support])
 808         if (srcdir=${srcdir}/gdbserver; \
 809                 . ${srcdir}/configure.srv; \
 810                 test -n "$UNSUPPORTED")
 811         then
 812             AC_MSG_RESULT([no])
 813             noconfigdirs="$noconfigdirs gdbserver"
 814         else
 815             AC_MSG_RESULT([yes])
 816         fi
 817     fi
 818 fi
 819
 820 # Disable libgo for some systems where it is known to not work.
 821 # For testing, you can easily override this with --enable-libgo.
 822 if test x$enable_libgo = x; then
 823     case "${target}" in
 824     *-*-darwin*)
 825         # PR 46986
 826         noconfigdirs="$noconfigdirs target-libgo"
 827         ;;
 828     *-*-cygwin* | *-*-mingw*)
 829         noconfigdirs="$noconfigdirs target-libgo"
 830         ;;
 831     bpf-*-*)
 832         noconfigdirs="$noconfigdirs target-libgo"
 833         ;;
 834     esac
 835 fi
 836
 837 # Default libgloss CPU subdirectory.
 838 libgloss_dir="$target_cpu"
 839
 840 case "${target}" in
 841   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 842     libgloss_dir=wince
 843     ;;
 844   aarch64*-*-* )
 845     libgloss_dir=aarch64
 846     ;;
 847   arm*-*-*)
 848     libgloss_dir=arm
 849     ;;
 850   cris-*-* | crisv32-*-*)
 851     libgloss_dir=cris
 852     ;;
 853   hppa*-*-*)
 854     libgloss_dir=pa
 855     ;;
 856   i[[3456789]]86-*-*)
 857     libgloss_dir=i386
 858     ;;
 859   loongarch*-*-*)
 860     libgloss_dir=loongarch
 861     ;;
 862   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 863     libgloss_dir=m68hc11
 864     ;;
 865   m68*-*-* | fido-*-*)
 866     libgloss_dir=m68k
 867     ;;
 868   mips*-*-*)
 869     libgloss_dir=mips
 870     ;;
 871   powerpc*-*-*)
 872     libgloss_dir=rs6000
 873     ;;
 874   pru-*-*)
 875     libgloss_dir=pru
 876     ;;
 877   sparc*-*-*)
 878     libgloss_dir=sparc
 879     ;;
 880 esac
 881
 882 # Disable newlib and libgloss for various target OSes.
 883 case "${target}" in
 884   alpha*-dec-osf*)
 885     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 886     ;;
 887   i[[3456789]]86-*-linux*)
 888     # This section makes it possible to build newlib natively on linux.
 889     # If we are using a cross compiler then don't configure newlib.
 890     if test x${is_cross_compiler} != xno ; then
 891       noconfigdirs="$noconfigdirs target-newlib"
 892     fi
 893     noconfigdirs="$noconfigdirs target-libgloss"
 894     # If we are not using a cross compiler, do configure newlib.
 895     # Note however, that newlib will only be configured in this situation
 896     # if the --with-newlib option has been given, because otherwise
 897     # 'target-newlib' will appear in skipdirs.
 898     ;;
 899   i[[3456789]]86-*-rdos*)
 900     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 901     ;;
 902   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 903     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 904     ;;
 905   sparc-*-sunos4*)
 906     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 907     ;;
 908   bpf-*-*)
 909     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 910     ;;
 911   *-*-aix*)
 912     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 913     ;;
 914   *-*-beos*)
 915     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 916     ;;
 917   *-*-chorusos)
 918     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 919     ;;
 920   *-*-dragonfly*)
 921     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 922     ;;
 923   *-*-freebsd*)
 924     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 925     ;;
 926   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 927     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 928     ;;
 929   *-*-lynxos*)
 930     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 931     ;;
 932   *-*-mingw*)
 933     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 934     ;;
 935   *-*-netbsd*)
 936     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 937     ;;
 938   *-*-netware*)
 939     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 940     ;;
 941   *-*-tpf*)
 942     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 943     ;;
 944   *-*-uclinux*)
 945     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 946     ;;
 947   *-*-vxworks*)
 948     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 949     ;;
 950 esac
 951
 952 case "${target}" in
 953   *-*-chorusos)
 954     ;;
 955   aarch64-*-darwin*)
 956     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 957     noconfigdirs="$noconfigdirs sim target-rda"
 958     ;;
 959   amdgcn*-*-*)
 960     ;;
 961   arm-*-darwin*)
 962     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 963     noconfigdirs="$noconfigdirs sim target-rda"
 964     ;;
 965   powerpc-*-darwin*)
 966     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 967     noconfigdirs="$noconfigdirs sim target-rda"
 968     ;;
 969   i[[3456789]]86-*-darwin*)
 970     noconfigdirs="$noconfigdirs ld gprof"
 971     noconfigdirs="$noconfigdirs sim target-rda"
 972     ;;
 973   x86_64-*-darwin[[912]]*)
 974     noconfigdirs="$noconfigdirs ld gas gprof"
 975     noconfigdirs="$noconfigdirs sim target-rda"
 976     ;;
 977   *-*-darwin*)
 978     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 979     noconfigdirs="$noconfigdirs sim target-rda"
 980     ;;
 981   *-*-dragonfly*)
 982     ;;
 983   *-*-freebsd*)
 984     if test "x$with_gmp" = x \
 985         && ! test -d ${srcdir}/gmp \
 986         && test -f /usr/local/include/gmp.h; then
 987       with_gmp=/usr/local
 988     fi
 989     ;;
 990   *-*-kaos*)
 991     # Remove unsupported stuff on all kaOS configurations.
 992     noconfigdirs="$noconfigdirs target-libgloss"
 993     ;;
 994   *-*-netbsd*)
 995     ;;
 996   *-*-netware*)
 997     ;;
 998   *-*-phoenix*)
 999     noconfigdirs="$noconfigdirs target-libgloss"
1000     ;;
1001   *-*-rtems*)
1002     noconfigdirs="$noconfigdirs target-libgloss"
1003     ;;
1004     # The tpf target doesn't support gdb yet.
1005   *-*-tpf*)
1006     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
1007     ;;
1008   *-*-uclinux*)
1009     noconfigdirs="$noconfigdirs target-rda"
1010     ;;
1011   *-*-vxworks*)
1012     ;;
1013   alpha*-dec-osf*)
1014     # ld works, but does not support shared libraries.
1015     # gas doesn't generate exception information.
1016     noconfigdirs="$noconfigdirs gas ld"
1017     ;;
1018   alpha*-*-*vms*)
1019     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1020     ;;
1021   alpha*-*-*)
1022     # newlib is not 64 bit ready
1023     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1024     ;;
1025   bpf-*-*)
1026     noconfigdirs="$noconfigdirs target-libobjc target-libbacktrace"
1027     ;;
1028   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1029     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1030     ;;
1031   arc*-*-*)
1032     noconfigdirs="$noconfigdirs sim"
1033     ;;
1034   arm-*-pe*)
1035     noconfigdirs="$noconfigdirs target-libgloss"
1036     ;;
1037   arm-*-riscix*)
1038     noconfigdirs="$noconfigdirs ld target-libgloss"
1039     ;;
1040   avr-*-*)
1041     if test x${with_avrlibc} != xno; then
1042       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1043     fi
1044     ;;
1045   c4x-*-* | tic4x-*-*)
1046     noconfigdirs="$noconfigdirs target-libgloss"
1047     ;;
1048   tic54x-*-*)
1049     noconfigdirs="$noconfigdirs target-libgloss gdb"
1050     ;;
1051   d10v-*-*)
1052     noconfigdirs="$noconfigdirs target-libgloss"
1053     ;;
1054   d30v-*-*)
1055     noconfigdirs="$noconfigdirs gdb"
1056     ;;
1057   fr30-*-elf*)
1058     noconfigdirs="$noconfigdirs gdb"
1059     ;;
1060   ft32-*-*)
1061     noconfigdirs="$noconfigdirs target-rda gprof"
1062     ;;
1063   moxie-*-*)
1064     noconfigdirs="$noconfigdirs"
1065     ;;
1066   h8300*-*-*)
1067     noconfigdirs="$noconfigdirs target-libgloss"
1068     ;;
1069   h8500-*-*)
1070     noconfigdirs="$noconfigdirs target-libgloss"
1071     ;;
1072   hppa*64*-*-hpux*)
1073     noconfigdirs="$noconfigdirs gdb"
1074     ;;
1075   hppa*64*-*-linux*)
1076     ;;
1077   hppa*-*-linux*)
1078     ;;
1079   hppa*-*-*elf* | \
1080   hppa*-*-lites* | \
1081   hppa*-*-openbsd* | \
1082   hppa*64*-*-*)
1083     ;;
1084   hppa*-*-pro*)
1085     ;;
1086   hppa*-*-*)
1087     noconfigdirs="$noconfigdirs ld"
1088     ;;
1089   i960-*-*)
1090     noconfigdirs="$noconfigdirs gdb"
1091     ;;
1092   ia64*-*-elf*)
1093     # No gdb support yet.
1094     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1095     ;;
1096   ia64*-**-hpux*)
1097     # No ld support yet.
1098     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1099     ;;
1100   ia64*-*-*vms*)
1101     # No ld support yet.
1102     noconfigdirs="$noconfigdirs libgui itcl ld"
1103     ;;
1104   i[[3456789]]86-w64-mingw*)
1105     ;;
1106   i[[3456789]]86-*-mingw*)
1107     target_configdirs="$target_configdirs target-winsup"
1108     ;;
1109   *-*-cygwin*)
1110     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1111     noconfigdirs="$noconfigdirs target-libgloss"
1112     # always build newlib if winsup directory is present.
1113     if test -d "$srcdir/winsup/cygwin"; then
1114       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1115     elif test -d "$srcdir/newlib"; then
1116       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1117     fi
1118     ;;
1119   i[[3456789]]86-*-pe)
1120     noconfigdirs="$noconfigdirs target-libgloss"
1121     ;;
1122   i[[3456789]]86-*-sco3.2v5*)
1123     # The linker does not yet know about weak symbols in COFF,
1124     # and is not configured to handle mixed ELF and COFF.
1125     noconfigdirs="$noconfigdirs ld target-libgloss"
1126     ;;
1127   i[[3456789]]86-*-sco*)
1128     noconfigdirs="$noconfigdirs gprof target-libgloss"
1129     ;;
1130   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1131     noconfigdirs="$noconfigdirs target-libgloss"
1132     ;;
1133   i[[3456789]]86-*-sysv4*)
1134     noconfigdirs="$noconfigdirs target-libgloss"
1135     ;;
1136   i[[3456789]]86-*-beos*)
1137     noconfigdirs="$noconfigdirs gdb"
1138     ;;
1139   i[[3456789]]86-*-rdos*)
1140     noconfigdirs="$noconfigdirs gdb"
1141     ;;
1142   mmix-*-*)
1143     noconfigdirs="$noconfigdirs gdb"
1144     ;;
1145   mt-*-*)
1146     noconfigdirs="$noconfigdirs sim"
1147     ;;
1148   nfp-*-*)
1149     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1150     noconfigdirs="$noconfigdirs $target_libraries"
1151     ;;
1152   pdp11-*-*)
1153     noconfigdirs="$noconfigdirs gdb gprof"
1154     ;;
1155   powerpc-*-aix*)
1156     # copied from rs6000-*-* entry
1157     noconfigdirs="$noconfigdirs gprof"
1158     ;;
1159   powerpc*-*-winnt* | powerpc*-*-pe*)
1160     target_configdirs="$target_configdirs target-winsup"
1161     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1162     # always build newlib.
1163     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1164     ;;
1165     # This is temporary until we can link against shared libraries
1166   powerpcle-*-solaris*)
1167     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1168     ;;
1169   powerpc-*-beos*)
1170     noconfigdirs="$noconfigdirs gdb"
1171     ;;
1172   rs6000-*-lynxos*)
1173     noconfigdirs="$noconfigdirs gprof"
1174     ;;
1175   rs6000-*-aix*)
1176     noconfigdirs="$noconfigdirs gprof"
1177     ;;
1178   rs6000-*-*)
1179     noconfigdirs="$noconfigdirs gprof"
1180     ;;
1181   m68k-apollo-*)
1182     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1183     ;;
1184   microblaze*)
1185     noconfigdirs="$noconfigdirs gprof"
1186     ;;
1187   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1188     if test x$with_newlib = xyes; then
1189       noconfigdirs="$noconfigdirs gprof"
1190     fi
1191     ;;
1192   mips*-*-irix5*)
1193     noconfigdirs="$noconfigdirs gprof target-libgloss"
1194     ;;
1195   mips*-*-irix6*)
1196     noconfigdirs="$noconfigdirs gprof target-libgloss"
1197     ;;
1198   mips*-*-bsd*)
1199     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1200     ;;
1201   mips*-*-linux*)
1202     ;;
1203   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1204   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1205     noconfigdirs="$noconfigdirs ld gas gprof"
1206     ;;
1207   mips*-*-*)
1208     noconfigdirs="$noconfigdirs gprof"
1209     ;;
1210   nvptx*-*-*)
1211     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1212     ;;
1213   sh-*-*)
1214     case "${target}" in
1215       sh*-*-elf)
1216          ;;
1217       *)
1218          noconfigdirs="$noconfigdirs target-libgloss" ;;
1219     esac
1220     ;;
1221   sparc-*-sunos4*)
1222     if test x${is_cross_compiler} = xno ; then
1223            use_gnu_ld=no
1224     fi
1225     ;;
1226   tic6x-*-*)
1227     noconfigdirs="$noconfigdirs sim"
1228     ;;
1229   v810-*-*)
1230     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1231     ;;
1232   vax-*-*)
1233     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1234     ;;
1235   wasm32-*-*)
1236     noconfigdirs="$noconfigdirs ld"
1237     ;;
1238   loongarch*-*-linux*)
1239     ;;
1240   loongarch*-*-*)
1241     noconfigdirs="$noconfigdirs gprof"
1242     ;;
1243 esac
1244
1245 # If we aren't building newlib, then don't build libgloss, since libgloss
1246 # depends upon some newlib header files.
1247 case "${noconfigdirs}" in
1248   *target-libgloss*) ;;
1249   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1250 esac
1251
1252 # Work in distributions that contain no compiler tools, like Autoconf.
1253 host_makefile_frag=/dev/null
1254 if test -d ${srcdir}/config ; then
1255 case "${host}" in
1256   i[[3456789]]86-*-msdosdjgpp*)
1257     host_makefile_frag="config/mh-djgpp"
1258     ;;
1259   *-cygwin*)
1260     ACX_CHECK_CYGWIN_CAT_WORKS
1261     host_makefile_frag="config/mh-cygwin"
1262     ;;
1263   *-mingw*)
1264     host_makefile_frag="config/mh-mingw"
1265     ;;
1266   alpha*-linux*)
1267     host_makefile_frag="config/mh-alpha-linux"
1268     ;;
1269   hppa*-hp-hpux*)
1270     host_makefile_frag="config/mh-pa"
1271     ;;
1272   hppa*-*)
1273     host_makefile_frag="config/mh-pa"
1274     ;;
1275   i?86-*-darwin[[89]]* | i?86-*-darwin1[[0-7]]* | powerpc*-*-darwin*)
1276     host_makefile_frag="config/mh-darwin"
1277     ;;
1278   powerpc-*-aix*)
1279     host_makefile_frag="config/mh-ppc-aix"
1280     ;;
1281   rs6000-*-aix*)
1282     host_makefile_frag="config/mh-ppc-aix"
1283     ;;
1284 esac
1285 fi
1286
1287 if test "${build}" != "${host}" ; then
1288   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1289   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1290   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1291   CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CC_FOR_BUILD) -E}"
1292   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1293   DSYMUTIL_FOR_BUILD=${DSYMUTIL_FOR_BUILD-dsymutil}
1294   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1295   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1296   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1297   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1298   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1299   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1300   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1301   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1302   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1303 else
1304   AR_FOR_BUILD="\$(AR)"
1305   AS_FOR_BUILD="\$(AS)"
1306   CC_FOR_BUILD="\$(CC)"
1307   CXX_FOR_BUILD="\$(CXX)"
1308   DSYMUTIL_FOR_BUILD="\$(DSYMUTIL)"
1309   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1310   GOC_FOR_BUILD="\$(GOC)"
1311   GDC_FOR_BUILD="\$(GDC)"
1312   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1313   LD_FOR_BUILD="\$(LD)"
1314   NM_FOR_BUILD="\$(NM)"
1315   RANLIB_FOR_BUILD="\$(RANLIB)"
1316   WINDRES_FOR_BUILD="\$(WINDRES)"
1317   WINDMC_FOR_BUILD="\$(WINDMC)"
1318 fi
1319
1320 AC_PROG_CC_C99
1321 AC_PROG_CXX
1322
1323 # We must set the default linker to the linker used by gcc for the correct
1324 # operation of libtool.  If LD is not defined and we are using gcc, try to
1325 # set the LD default to the ld used by gcc.
1326 if test -z "$LD"; then
1327   if test "$GCC" = yes; then
1328     case $build in
1329     *-*-mingw*)
1330       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1331     *)
1332       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1333     esac
1334     case $gcc_prog_ld in
1335     # Accept absolute paths.
1336     [[\\/]* | [A-Za-z]:[\\/]*)]
1337       LD="$gcc_prog_ld" ;;
1338     esac
1339   fi
1340 fi
1341
1342 # Check whether -static-libstdc++ -static-libgcc is supported.
1343 have_static_libs=no
1344 if test "$GCC" = yes; then
1345   saved_LDFLAGS="$LDFLAGS"
1346
1347   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1348   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1349   AC_LANG_PUSH(C++)
1350   AC_LINK_IFELSE([AC_LANG_SOURCE([
1351 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1352 #error -static-libstdc++ not implemented
1353 #endif
1354 int main() {}])],
1355     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1356     [AC_MSG_RESULT([no])])
1357   AC_LANG_POP(C++)
1358
1359   LDFLAGS="$saved_LDFLAGS"
1360 fi
1361
1362 ACX_PROG_GNAT
1363 ACX_PROG_GDC
1364 ACX_PROG_CMP_IGNORE_INITIAL
1365
1366 AC_ARG_ENABLE([bootstrap],
1367 [AS_HELP_STRING([--enable-bootstrap],
1368                 [enable bootstrapping @<:@yes if native build@:>@])],,
1369 enable_bootstrap=default)
1370
1371 # Issue errors and warnings for invalid/strange bootstrap combinations.
1372 if test -r $srcdir/gcc/configure; then
1373   have_compiler=yes
1374 else
1375   have_compiler=no
1376 fi
1377
1378 case "$have_compiler:$host:$target:$enable_bootstrap" in
1379   *:*:*:no) ;;
1380
1381   # Default behavior.  Enable bootstrap if we have a compiler
1382   # and we are in a native configuration.
1383   yes:$build:$build:default)
1384     enable_bootstrap=yes ;;
1385
1386   *:*:*:default)
1387     enable_bootstrap=no ;;
1388
1389   # We have a compiler and we are in a native configuration, bootstrap is ok
1390   yes:$build:$build:yes)
1391     ;;
1392
1393   # Other configurations, but we have a compiler.  Assume the user knows
1394   # what he's doing.
1395   yes:*:*:yes)
1396     AC_MSG_WARN([trying to bootstrap a cross compiler])
1397     ;;
1398
1399   # No compiler: if they passed --enable-bootstrap explicitly, fail
1400   no:*:*:yes)
1401     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1402
1403   # Fail if wrong command line
1404   *)
1405     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1406     ;;
1407 esac
1408
1409 # When bootstrapping with GCC, build stage 1 in C++11 mode to ensure that a
1410 # C++11 compiler can still start the bootstrap.  Otherwise, if building GCC,
1411 # require C++11 (or higher).
1412 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1413   CXX="$CXX -std=c++11"
1414 elif test "$have_compiler" = yes; then
1415   AX_CXX_COMPILE_STDCXX(11)
1416
1417   if test "${build}" != "${host}"; then
1418     AX_CXX_COMPILE_STDCXX(11, [], [], [_FOR_BUILD])
1419   fi
1420 fi
1421
1422 AC_ARG_ENABLE([pgo-build],
1423 [AS_HELP_STRING([--enable-pgo-build[[=lto]]],
1424                 [enable the PGO build])],
1425 [enable_pgo_build=$enableval],
1426 [enable_pgo_build=no])
1427
1428 # Issue errors and warnings for invalid/strange PGO build combinations.
1429 case "$have_compiler:$host:$target:$enable_pgo_build" in
1430   *:*:*:no) ;;
1431
1432   # Allow the PGO build only if we aren't building a compiler and
1433   # we are in a native configuration.
1434   no:$build:$build:yes | no:$build:$build:lto) ;;
1435
1436   # Disallow the PGO bootstrap if we are building a compiler.
1437   yes:*:*:yes | yes:*:*:lto)
1438     AC_MSG_ERROR([cannot perform the PGO bootstrap when building a compiler]) ;;
1439
1440   *)
1441     AC_MSG_ERROR([invalid option for --enable-pgo-build])
1442     ;;
1443 esac
1444
1445 if test "$enable_pgo_build" != "no"; then
1446   AC_MSG_CHECKING([whether the compiler supports -fprofile-generate])
1447   old_CFLAGS="$CFLAGS"
1448   PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
1449   CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
1450   AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1451                     [PGO_BUILD_GEN_CFLAGS=])
1452   CFLAGS="$old_CFLAGS"
1453   if test -n "$PGO_BUILD_GEN_CFLAGS"; then
1454     AC_MSG_RESULT([yes])
1455     PGO_BUILD_USE_CFLAGS="-fprofile-use"
1456   else
1457     AC_MSG_RESULT([no])
1458     AC_MSG_ERROR([cannot perform the PGO build without -fprofile-generate])
1459   fi
1460
1461   if test "$enable_pgo_build" = "lto"; then
1462     AC_MSG_CHECKING([whether the compiler supports -flto=jobserver -ffat-lto-objects])
1463     old_CFLAGS="$CFLAGS"
1464     PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
1465     CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
1466     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
1467                       [PGO_BUILD_LTO_CFLAGS=])
1468     CFLAGS="$old_CFLAGS"
1469     if test -n "$PGO_BUILD_LTO_CFLAGS"; then
1470       AC_MSG_RESULT([yes])
1471     else
1472       AC_MSG_RESULT([no])
1473       AC_MSG_WARN([LTO is disabled for the PGO build])
1474     fi
1475   fi
1476 fi
1477 AC_SUBST(PGO_BUILD_GEN_CFLAGS)
1478 AC_SUBST(PGO_BUILD_USE_CFLAGS)
1479 AC_SUBST(PGO_BUILD_LTO_CFLAGS)
1480
1481 # Used for setting $lt_cv_objdir
1482 _LT_CHECK_OBJDIR
1483
1484 # Check for GMP, MPFR and MPC
1485 require_gmp=no
1486 require_mpc=no
1487 if test -d ${srcdir}/gcc ; then
1488   require_gmp=yes
1489   require_mpc=yes
1490 fi
1491 if test -d ${srcdir}/gdb ; then
1492   require_gmp=yes
1493 fi
1494
1495 gmplibs="-lmpfr -lgmp"
1496 if test x"$require_mpc" = "xyes" ; then
1497   gmplibs="-lmpc $gmplibs"
1498 fi
1499 gmpinc=
1500 have_gmp=no
1501
1502 # Specify a location for mpc
1503 # check for this first so it ends up on the link line before mpfr.
1504 AC_ARG_WITH(mpc,
1505 [AS_HELP_STRING([--with-mpc=PATH],
1506                 [specify prefix directory for installed MPC package.
1507                  Equivalent to --with-mpc-include=PATH/include
1508                  plus --with-mpc-lib=PATH/lib])])
1509 AC_ARG_WITH(mpc-include,
1510 [AS_HELP_STRING([--with-mpc-include=PATH],
1511                 [specify directory for installed MPC include files])])
1512 AC_ARG_WITH(mpc-lib,
1513 [AS_HELP_STRING([--with-mpc-lib=PATH],
1514                 [specify directory for the installed MPC library])])
1515
1516 if test "x$with_mpc" != x; then
1517   gmplibs="-L$with_mpc/lib $gmplibs"
1518   gmpinc="-I$with_mpc/include $gmpinc"
1519 fi
1520 if test "x$with_mpc_include" != x; then
1521   gmpinc="-I$with_mpc_include $gmpinc"
1522 fi
1523 if test "x$with_mpc_lib" != x; then
1524   gmplibs="-L$with_mpc_lib $gmplibs"
1525 fi
1526 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1527   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1528   gmpinc='-I$$s/mpc/src '"$gmpinc"
1529   # Do not test the mpc version.  Assume that it is sufficient, since
1530   # it is in the source tree, and the library has not been built yet
1531   # but it would be included on the link line in the version check below
1532   # hence making the test fail.
1533   have_gmp=yes
1534 fi
1535
1536 # Specify a location for mpfr
1537 # check for this first so it ends up on the link line before gmp.
1538 AC_ARG_WITH(mpfr,
1539 [AS_HELP_STRING([--with-mpfr=PATH],
1540                 [specify prefix directory for installed MPFR package.
1541                  Equivalent to --with-mpfr-include=PATH/include
1542                  plus --with-mpfr-lib=PATH/lib])])
1543 AC_ARG_WITH(mpfr-include,
1544 [AS_HELP_STRING([--with-mpfr-include=PATH],
1545                 [specify directory for installed MPFR include files])])
1546 AC_ARG_WITH(mpfr-lib,
1547 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1548                 [specify directory for the installed MPFR library])])
1549
1550 if test "x$with_mpfr" != x; then
1551   gmplibs="-L$with_mpfr/lib $gmplibs"
1552   gmpinc="-I$with_mpfr/include $gmpinc"
1553 fi
1554 if test "x$with_mpfr_include" != x; then
1555   gmpinc="-I$with_mpfr_include $gmpinc"
1556 fi
1557 if test "x$with_mpfr_lib" != x; then
1558   gmplibs="-L$with_mpfr_lib $gmplibs"
1559 fi
1560 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1561   # MPFR v3.1.0 moved the sources into a src sub-directory.
1562   if ! test -d ${srcdir}/mpfr/src; then
1563     AC_MSG_ERROR([dnl
1564 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1565   fi
1566   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1567   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1568   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1569   # Do not test the mpfr version.  Assume that it is sufficient, since
1570   # it is in the source tree, and the library has not been built yet
1571   # but it would be included on the link line in the version check below
1572   # hence making the test fail.
1573   have_gmp=yes
1574 fi
1575
1576 # Specify a location for gmp
1577 AC_ARG_WITH(gmp,
1578 [AS_HELP_STRING([--with-gmp=PATH],
1579                 [specify prefix directory for the installed GMP package.
1580                  Equivalent to --with-gmp-include=PATH/include
1581                  plus --with-gmp-lib=PATH/lib])])
1582 AC_ARG_WITH(gmp-include,
1583 [AS_HELP_STRING([--with-gmp-include=PATH],
1584                 [specify directory for installed GMP include files])])
1585 AC_ARG_WITH(gmp-lib,
1586 [AS_HELP_STRING([--with-gmp-lib=PATH],
1587                 [specify directory for the installed GMP library])])
1588
1589
1590 if test "x$with_gmp" != x; then
1591   gmplibs="-L$with_gmp/lib $gmplibs"
1592   gmpinc="-I$with_gmp/include $gmpinc"
1593 fi
1594 if test "x$with_gmp_include" != x; then
1595   gmpinc="-I$with_gmp_include $gmpinc"
1596 fi
1597 if test "x$with_gmp_lib" != x; then
1598   gmplibs="-L$with_gmp_lib $gmplibs"
1599 fi
1600 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1601   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1602   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1603   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1604   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1605   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1606   # Do not test the gmp version.  Assume that it is sufficient, since
1607   # it is in the source tree, and the library has not been built yet
1608   # but it would be included on the link line in the version check below
1609   # hence making the test fail.
1610   have_gmp=yes
1611 fi
1612
1613 if test "x$require_gmp" = xyes && test "x$have_gmp" = xno; then
1614   have_gmp=yes
1615   saved_CFLAGS="$CFLAGS"
1616   CFLAGS="$CFLAGS $gmpinc"
1617   # Check for the recommended and required versions of GMP.
1618   AC_MSG_CHECKING([for the correct version of gmp.h])
1619   AC_TRY_COMPILE([#include "gmp.h"],[
1620   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1621   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1622   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1623   choke me
1624   #endif
1625   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1626   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1627   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1628   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1629   choke me
1630   #endif
1631   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1632    [AC_MSG_RESULT([no]); have_gmp=no])
1633
1634   # If we have GMP, check the MPFR version.
1635   if test x"$have_gmp" = xyes; then
1636     # Check for the recommended and required versions of MPFR.
1637     AC_MSG_CHECKING([for the correct version of mpfr.h])
1638     AC_TRY_COMPILE([#include <gmp.h>
1639     #include <mpfr.h>],[
1640     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,0)
1641     choke me
1642     #endif
1643     ], [AC_TRY_COMPILE([#include <gmp.h>
1644     #include <mpfr.h>],[
1645     #if MPFR_VERSION < MPFR_VERSION_NUM(3,1,6)
1646     choke me
1647     #endif
1648     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1649      [AC_MSG_RESULT([no]); have_gmp=no])
1650   fi
1651
1652   # Check for the MPC header version.
1653   if test "x$require_mpc" = xyes && test x"$have_gmp" = xyes ; then
1654     # Check for the recommended and required versions of MPC.
1655     AC_MSG_CHECKING([for the correct version of mpc.h])
1656     AC_TRY_COMPILE([#include <mpc.h>],[
1657     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1658     choke me
1659     #endif
1660     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1661     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1662     choke me
1663     #endif
1664     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1665      [AC_MSG_RESULT([no]); have_gmp=no])
1666   fi
1667
1668   # Now check the MPFR library.
1669   if test x"$have_gmp" = xyes; then
1670     saved_LIBS="$LIBS"
1671     LIBS="$LIBS $gmplibs"
1672     AC_MSG_CHECKING([for the correct version of the gmp/mpfr libraries])
1673     AC_TRY_LINK([#include <mpfr.h>],[
1674     mpfr_t n;
1675     mpfr_t x;
1676     int t;
1677     mpfr_init (n);
1678     mpfr_init (x);
1679     mpfr_atan2 (n, n, x, MPFR_RNDN);
1680     mpfr_erfc (n, x, MPFR_RNDN);
1681     mpfr_subnormalize (x, t, MPFR_RNDN);
1682     mpfr_clear(n);
1683     mpfr_clear(x);
1684     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1685     LIBS="$saved_LIBS"
1686   fi
1687
1688   # Now check the MPC library
1689   if test "x$require_mpc" = xyes && test x"$have_gmp" = xyes; then
1690     saved_LIBS="$LIBS"
1691     LIBS="$LIBS $gmplibs"
1692     AC_MSG_CHECKING([for the correct version of the mpc libraries])
1693     AC_TRY_LINK([#include <mpc.h>],[
1694     mpc_t c;
1695     mpc_init2 (c, 53);
1696     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1697     mpc_cosh (c, c, MPC_RNDNN);
1698     mpc_pow (c, c, c, MPC_RNDNN);
1699     mpc_acosh (c, c, MPC_RNDNN);
1700     mpc_clear (c);
1701     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1702     LIBS="$saved_LIBS"
1703   fi
1704
1705   CFLAGS="$saved_CFLAGS"
1706
1707 # The library versions listed in the error message below should match
1708 # the HARD-minimums enforced above.
1709   if test x$have_gmp != xyes; then
1710     if test -d ${srcdir}/gcc ; then
1711       AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 3.1.0+ and MPC 0.8.0+.
1712 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1713 their locations.  Source code for these libraries can be found at
1714 their respective hosting sites as well as at
1715 https://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1716 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1717 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1718 make sure that you have installed both the libraries and the header
1719 files.  They may be located in separate packages.])
1720     else
1721       AC_MSG_ERROR([Building GDB requires GMP 4.2+, and MPFR 3.1.0+.
1722 Try the --with-gmp and/or --with-mpfr options to specify
1723 their locations.  If you obtained GMP and/or MPFR from a vendor
1724 distribution package, make sure that you have installed both the libraries
1725 and the header files.  They may be located in separate packages.])
1726     fi
1727   fi
1728 fi
1729
1730 # Flags needed for both GMP, MPFR and/or MPC.
1731 AC_SUBST(gmplibs)
1732 AC_SUBST(gmpinc)
1733 AC_SUBST(extra_mpfr_configure_flags)
1734 AC_SUBST(extra_mpc_gmp_configure_flags)
1735 AC_SUBST(extra_mpc_mpfr_configure_flags)
1736 AC_SUBST(extra_isl_gmp_configure_flags)
1737
1738 # Libraries to use for stage1 or when not bootstrapping.
1739 AC_ARG_WITH(stage1-libs,
1740 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1741 [if test "$withval" = "no" -o "$withval" = "yes"; then
1742    stage1_libs=
1743  else
1744    stage1_libs=$withval
1745  fi],
1746 [stage1_libs=])
1747 AC_SUBST(stage1_libs)
1748
1749 # Whether or not to use -static-libstdc++ and -static-libgcc.  The
1750 # default is yes if gcc is being built; no otherwise.  The reason for
1751 # this default is that gdb is sometimes linked against GNU Source
1752 # Highlight, which is a shared library that uses C++ exceptions.  In
1753 # this case, -static-libstdc++ will cause crashes.
1754 AC_ARG_WITH(static-standard-libraries,
1755 [AS_HELP_STRING([--with-static-standard-libraries],
1756                 [use -static-libstdc++ and -static-libgcc (default=auto)])],
1757 [], [with_static_standard_libraries=auto])
1758 if test "$with_static_standard_libraries" = auto; then
1759   with_static_standard_libraries=$have_compiler
1760 fi
1761
1762 # Linker flags to use for stage1 or when not bootstrapping.
1763 AC_ARG_WITH(stage1-ldflags,
1764 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1765 [if test "$withval" = "no" -o "$withval" = "yes"; then
1766    stage1_ldflags=
1767  else
1768    stage1_ldflags=$withval
1769  fi],
1770 [stage1_ldflags=
1771  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1772  # if supported.  But if the user explicitly specified the libraries to use,
1773  # trust that they are doing what they want.
1774  if test "$with_static_standard_libraries" = yes -a "$stage1_libs" = "" \
1775      -a "$have_static_libs" = yes; then
1776    stage1_ldflags="-static-libstdc++ -static-libgcc"
1777  fi])
1778 AC_SUBST(stage1_ldflags)
1779
1780 # Libraries to use for stage2 and later builds.
1781 AC_ARG_WITH(boot-libs,
1782 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1783 [if test "$withval" = "no" -o "$withval" = "yes"; then
1784    poststage1_libs=
1785  else
1786    poststage1_libs=$withval
1787  fi],
1788 [poststage1_libs=])
1789 AC_SUBST(poststage1_libs)
1790
1791 # Linker flags to use for stage2 and later builds.
1792 AC_ARG_WITH(boot-ldflags,
1793 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1794                 [linker flags for stage2 and later])],
1795 [if test "$withval" = "no" -o "$withval" = "yes"; then
1796    poststage1_ldflags=
1797  else
1798    poststage1_ldflags=$withval
1799  fi],
1800 [poststage1_ldflags=
1801  # In stages 2 and 3, default to linking libstdc++ and libgcc
1802  # statically.  But if the user explicitly specified the libraries to
1803  # use, trust that they are doing what they want.
1804  if test "$poststage1_libs" = ""; then
1805    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1806  fi])
1807 AC_SUBST(poststage1_ldflags)
1808
1809 # GCC GRAPHITE dependency isl.
1810 # Basic setup is inlined here, actual checks are in config/isl.m4
1811
1812 AC_ARG_WITH(isl,
1813   [AS_HELP_STRING(
1814    [--with-isl=PATH],
1815    [Specify prefix directory for the installed isl package.
1816     Equivalent to --with-isl-include=PATH/include
1817     plus --with-isl-lib=PATH/lib])])
1818
1819 # Treat --without-isl as a request to disable
1820 # GRAPHITE support and skip all following checks.
1821 if test "x$with_isl" != "xno"; then
1822   # Check for isl
1823   dnl Provide configure switches and initialize islinc & isllibs
1824   dnl with user input.
1825   ISL_INIT_FLAGS
1826   dnl The versions of isl that work for Graphite
1827   ISL_CHECK_VERSION()
1828   dnl Only execute fail-action, if isl has been requested.
1829   ISL_IF_FAILED([
1830     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1831 fi
1832
1833 # If the isl check failed, disable builds of in-tree variant of isl
1834 if test "x$with_isl" = xno ||
1835    test "x$gcc_cv_isl" = xno; then
1836   noconfigdirs="$noconfigdirs isl"
1837   islinc=
1838 fi
1839
1840 AC_SUBST(isllibs)
1841 AC_SUBST(islinc)
1842
1843 # Check for LTO support.
1844 AC_ARG_ENABLE(lto,
1845 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1846 enable_lto=$enableval,
1847 enable_lto=yes; default_enable_lto=yes)
1848
1849 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1850   build_lto_plugin=yes
1851 ],[if test x"$default_enable_lto" = x"yes" ; then
1852     case $target in
1853       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1854       # On other non-ELF platforms, LTO has yet to be validated.
1855       *) enable_lto=no ;;
1856     esac
1857   else
1858   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1859   # It would also be nice to check the binutils support, but we don't
1860   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1861   # warn during gcc/ subconfigure; unless you're bootstrapping with
1862   # -flto it won't be needed until after installation anyway.
1863     case $target in
1864       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1865       *) if test x"$enable_lto" = x"yes"; then
1866         AC_MSG_ERROR([LTO support is not enabled for this target.])
1867         fi
1868       ;;
1869     esac
1870   fi
1871   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1872   # Build it unless LTO was explicitly disabled.
1873   case $target in
1874     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1875     *) ;;
1876   esac
1877 ])
1878
1879 AC_ARG_ENABLE(linker-plugin-configure-flags,
1880   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1881     [additional flags for configuring linker plugins @<:@none@:>@])],
1882   extra_linker_plugin_configure_flags=$enableval,
1883   extra_linker_plugin_configure_flags=)
1884 AC_SUBST(extra_linker_plugin_configure_flags)
1885 AC_ARG_ENABLE(linker-plugin-flags,
1886   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1887     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1888   extra_linker_plugin_flags=$enableval,
1889   extra_linker_plugin_flags=)
1890 AC_SUBST(extra_linker_plugin_flags)
1891
1892 # Enable --enable-host-shared.
1893 # Checked early to determine whether jit is an 'all' language
1894 AC_ARG_ENABLE(host-shared,
1895 [AS_HELP_STRING([--enable-host-shared],
1896                 [build host code as shared libraries])],
1897 [host_shared=$enableval
1898  case $host in
1899    x86_64-*-darwin* | aarch64-*-darwin*)
1900      if test x$host_shared != xyes ; then
1901        # PIC is the default, and actually cannot be switched off.
1902        echo configure.ac: warning: PIC code is required for the configured target, host-shared setting ignored. 1>&2
1903        host_shared=yes
1904      fi ;;
1905   *) ;;
1906  esac],
1907 [case $host in
1908   x86_64-*-darwin* | aarch64-*-darwin*) host_shared=yes ;;
1909   *) host_shared=no ;;
1910  esac])
1911
1912 AC_SUBST(host_shared)
1913
1914 # If we are building PIC/PIE host executables, and we are building dependent
1915 # libs (e.g. GMP) in-tree those libs need to be configured to generate PIC
1916 # code.
1917 host_libs_picflag=
1918 if test "$host_shared" = "yes";then
1919 host_libs_picflag='--with-pic'
1920 fi
1921 AC_SUBST(host_libs_picflag)
1922
1923 # By default, C and C++ are the only stage 1 languages.
1924 stage1_languages=,c,
1925
1926 # Target libraries that we bootstrap.
1927 bootstrap_target_libs=,target-libgcc,
1928
1929 # Figure out what language subdirectories are present.
1930 # Look if the user specified --enable-languages="..."; if not, use
1931 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1932 # go away some day.
1933 # NB:  embedded tabs in this IF block -- do not untabify
1934 if test -d ${srcdir}/gcc; then
1935   if test x"${enable_languages+set}" != xset; then
1936     if test x"${LANGUAGES+set}" = xset; then
1937       enable_languages="${LANGUAGES}"
1938         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1939     else
1940       enable_languages=default
1941     fi
1942   else
1943     if test x"${enable_languages}" = x ||
1944        test x"${enable_languages}" = xyes;
1945        then
1946       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1947       exit 1
1948     fi
1949   fi
1950   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1951
1952   # 'f95' is the old name for the 'fortran' language. We issue a warning
1953   # and make the substitution.
1954   case ,${enable_languages}, in
1955     *,f95,*)
1956       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1957       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1958       ;;
1959   esac
1960
1961   # If bootstrapping, C++ must be enabled.
1962   case ",$enable_languages,:$enable_bootstrap" in
1963     *,c++,*:*) ;;
1964     *:yes)
1965       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1966         enable_languages="${enable_languages},c++"
1967       else
1968         AC_MSG_ERROR([bootstrapping requires c++ sources])
1969       fi
1970       ;;
1971   esac
1972
1973   # First scan to see if an enabled language requires some other language.
1974   # We assume that a given config-lang.in will list all the language
1975   # front ends it requires, even if some are required indirectly.
1976   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1977     case ${lang_frag} in
1978       ..) ;;
1979       # The odd quoting in the next line works around
1980       # an apparent bug in bash 1.12 on linux.
1981       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1982       *)
1983         # From the config-lang.in, get $language, $lang_requires, and
1984         # $lang_requires_boot_languages.
1985         language=
1986         lang_requires=
1987         lang_requires_boot_languages=
1988         # set srcdir during sourcing lang_frag to the gcc dir.
1989         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
1990         # polutes this shell
1991         saved_srcdir=${srcdir}
1992         srcdir=${srcdir}/gcc . ${lang_frag}
1993         srcdir=${saved_srcdir}
1994         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1995           case ,${enable_languages}, in
1996             *,$other,*) ;;
1997             *,default,*) ;;
1998             *,all,*) ;;
1999             *,$language,*)
2000               echo " \`$other' language required by \`$language'; enabling" 1>&2
2001               enable_languages="${enable_languages},${other}"
2002               ;;
2003           esac
2004         done
2005         for other in ${lang_requires_boot_languages} ; do
2006           if test "$other" != "c"; then
2007             case ,${enable_stage1_languages}, in
2008               *,$other,*) ;;
2009               *,default,*) ;;
2010               *,all,*) ;;
2011               *)
2012                 case ,${enable_languages}, in
2013                   *,$language,*)
2014                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
2015                     enable_stage1_languages="$enable_stage1_languages,${other}"
2016                     ;;
2017                 esac
2018                 ;;
2019             esac
2020           fi
2021         done
2022         ;;
2023     esac
2024   done
2025
2026   new_enable_languages=,c,
2027
2028   # If LTO is enabled, add the LTO front end.
2029   if test "$enable_lto" = "yes" ; then
2030     case ,${enable_languages}, in
2031       *,lto,*) ;;
2032       *) enable_languages="${enable_languages},lto" ;;
2033     esac
2034     if test "${build_lto_plugin}" = "yes" ; then
2035       configdirs="$configdirs lto-plugin"
2036     fi
2037   fi
2038
2039   # If we're building an offloading compiler, add the LTO front end.
2040   if test x"$enable_as_accelerator_for" != x ; then
2041     case ,${enable_languages}, in
2042       *,lto,*) ;;
2043       *) enable_languages="${enable_languages},lto" ;;
2044     esac
2045   fi
2046
2047   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
2048   potential_languages=,c,
2049
2050   enabled_target_libs=
2051   disabled_target_libs=
2052
2053   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2054     case ${lang_frag} in
2055       ..) ;;
2056       # The odd quoting in the next line works around
2057       # an apparent bug in bash 1.12 on linux.
2058       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2059       *)
2060         # From the config-lang.in, get $language, $target_libs,
2061         # $lang_dirs, $boot_language, and $build_by_default
2062         language=
2063         target_libs=
2064         lang_dirs=
2065         subdir_requires=
2066         boot_language=no
2067         build_by_default=yes
2068         # set srcdir during sourcing.  See above about save & restore
2069         saved_srcdir=${srcdir}
2070         srcdir=${srcdir}/gcc . ${lang_frag}
2071         srcdir=${saved_srcdir}
2072         if test x${language} = x; then
2073           echo "${lang_frag} doesn't set \$language." 1>&2
2074           exit 1
2075         fi
2076
2077         if test "$language" = "c++"; then
2078           boot_language=yes
2079         fi
2080
2081         add_this_lang=no
2082         # C is always enabled, so no need to add it again
2083         if test "$language" != "c"; then
2084           case ,${enable_languages}, in
2085             *,${language},*)
2086               # Language was explicitly selected; include it
2087               add_this_lang=yes
2088               ;;
2089             *,all,*)
2090               # All languages are enabled
2091               add_this_lang=all
2092               ;;
2093             *,default,*)
2094               # 'default' was selected, select it if it is a default language
2095               add_this_lang=${build_by_default}
2096               ;;
2097           esac
2098         fi
2099
2100         # Disable languages that need other directories if these aren't available.
2101         for i in $subdir_requires; do
2102           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2103           case ${add_this_lang} in
2104             yes)
2105               # Specifically requested language; tell them.
2106               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2107               ;;
2108             all)
2109               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2110               add_this_lang=unsupported
2111               ;;
2112             *)
2113               # Silently disable.
2114               add_this_lang=unsupported
2115               ;;
2116           esac
2117         done
2118
2119         # Disable Ada if no preexisting GNAT is available.
2120         case ${add_this_lang}:${language}:${have_gnat} in
2121           yes:ada:no)
2122             # Specifically requested language; tell them.
2123             AC_MSG_ERROR([GNAT is required to build $language])
2124             ;;
2125           all:ada:no)
2126             AC_MSG_WARN([GNAT is required to build $language])
2127             add_this_lang=unsupported
2128             ;;
2129           *:ada:no)
2130             # Silently disable.
2131             add_this_lang=unsupported
2132             ;;
2133         esac
2134
2135         # Disable D if no preexisting GDC is available.
2136         case ${add_this_lang}:${language}:${have_gdc} in
2137           yes:d:no)
2138             # Specifically requested language; tell them.
2139             AC_MSG_ERROR([GDC is required to build $language])
2140            ;;
2141           all:d:no)
2142             AC_MSG_WARN([GDC is required to build $language])
2143             add_this_lang=unsupported
2144             ;;
2145           *:d:no)
2146             # Silently disable.
2147             add_this_lang=unsupported
2148             ;;
2149         esac
2150
2151         # Disable jit if -enable-host-shared not specified
2152         # but not if building for Mingw. All code in Windows
2153         # is position independent code (PIC).
2154         case $target in
2155           *mingw*) ;;
2156           *)
2157           case ${add_this_lang}:${language}:${host_shared} in
2158             yes:jit:no)
2159                    # PR jit/64780: explicitly specify --enable-host-shared
2160             AC_MSG_ERROR([
2161 Enabling language "jit" requires --enable-host-shared.
2162
2163 --enable-host-shared typically slows the rest of the compiler down by
2164 a few %, so you must explicitly enable it.
2165
2166 If you want to build both the jit and the regular compiler, it is often
2167 best to do this via two separate configure/builds, in separate
2168 directories, to avoid imposing the performance cost of
2169 --enable-host-shared on the regular compiler.])
2170                     ;;
2171             all:jit:no)
2172               AC_MSG_WARN([--enable-host-shared required to build $language])
2173               add_this_lang=unsupported
2174               ;;
2175             *:jit:no)
2176               # Silently disable.
2177               add_this_lang=unsupported
2178               ;;
2179                 esac
2180           ;;
2181         esac
2182
2183         # Disable a language that is unsupported by the target.
2184         case "${add_this_lang}: $unsupported_languages " in
2185           no:*) ;;
2186           unsupported:*) ;;
2187           *:*" $language "*)
2188             AC_MSG_WARN([${language} not supported for this target])
2189             add_this_lang=unsupported
2190             ;;
2191         esac
2192
2193         case $add_this_lang in
2194           unsupported)
2195             # Remove language-dependent dirs.
2196             disabled_target_libs="$disabled_target_libs $target_libs"
2197             noconfigdirs="$noconfigdirs $lang_dirs"
2198             ;;
2199           no)
2200             # Remove language-dependent dirs; still show language as supported.
2201             disabled_target_libs="$disabled_target_libs $target_libs"
2202             noconfigdirs="$noconfigdirs $lang_dirs"
2203             potential_languages="${potential_languages}${language},"
2204             ;;
2205           all|yes)
2206             new_enable_languages="${new_enable_languages}${language},"
2207             potential_languages="${potential_languages}${language},"
2208             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2209             enabled_target_libs="$enabled_target_libs $target_libs"
2210             case "${boot_language}:,$enable_stage1_languages," in
2211               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2212                 # Add to (comma-separated) list of stage 1 languages.
2213                 case ",$stage1_languages," in
2214                   *,$language,* | ,yes, | ,all,) ;;
2215                   *) stage1_languages="${stage1_languages}${language}," ;;
2216                 esac
2217                 # We need to bootstrap any supporting libraries.
2218                 bootstrap_target_libs=`echo "${bootstrap_target_libs}${target_libs}," | sed "s/ /,/g"`
2219                 ;;
2220             esac
2221             ;;
2222         esac
2223         ;;
2224     esac
2225   done
2226
2227   # Add target libraries which are only needed for disabled languages
2228   # to noconfigdirs.
2229   if test -n "$disabled_target_libs"; then
2230     for dir in $disabled_target_libs; do
2231       case " $enabled_target_libs " in
2232       *" ${dir} "*) ;;
2233       *) noconfigdirs="$noconfigdirs $dir" ;;
2234       esac
2235     done
2236   fi
2237
2238   AC_ARG_ENABLE(stage1-languages,
2239   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2240                   [choose additional languages to build during
2241                   stage1.  Mostly useful for compiler development])],
2242   [case ,${enable_stage1_languages}, in
2243     ,no,|,,)
2244       # Set it to something that will have no effect in the loop below
2245       enable_stage1_languages=c ;;
2246     ,yes,)
2247       enable_stage1_languages=`echo $new_enable_languages | \
2248         sed -e "s/^,//" -e "s/,$//" ` ;;
2249     *,all,*)
2250       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2251         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2252   esac
2253
2254   # Add "good" languages from enable_stage1_languages to stage1_languages,
2255   # while "bad" languages go in missing_languages.  Leave no duplicates.
2256   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2257     case $potential_languages in
2258       *,$i,*)
2259         case $stage1_languages in
2260           *,$i,*) ;;
2261           *) stage1_languages="$stage1_languages$i," ;;
2262         esac ;;
2263       *)
2264         case $missing_languages in
2265           *,$i,*) ;;
2266           *) missing_languages="$missing_languages$i," ;;
2267         esac ;;
2268      esac
2269   done])
2270
2271   # Remove leading/trailing commas that were added for simplicity
2272   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2273   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2274   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2275   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2276
2277   if test "x$missing_languages" != x; then
2278     AC_MSG_ERROR([
2279 The following requested languages could not be built: ${missing_languages}
2280 Supported languages are: ${potential_languages}])
2281   fi
2282   if test "x$new_enable_languages" != "x$enable_languages"; then
2283     echo The following languages will be built: ${new_enable_languages}
2284     enable_languages="$new_enable_languages"
2285   fi
2286
2287   AC_SUBST(stage1_languages)
2288   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2289 fi
2290
2291 # Handle --disable-<component> generically.
2292 for dir in $configdirs $build_configdirs $target_configdirs ; do
2293   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2294   varname=`echo $dirname | sed -e s/+/_/g`
2295   if eval test x\${enable_${varname}} "=" xno ; then
2296     noconfigdirs="$noconfigdirs $dir"
2297   fi
2298 done
2299
2300 # Check for Boehm's garbage collector
2301 AC_ARG_ENABLE(objc-gc,
2302 [AS_HELP_STRING([--enable-objc-gc],
2303                 [enable use of Boehm's garbage collector with the
2304                  GNU Objective-C runtime])])
2305 AC_ARG_WITH([target-bdw-gc],
2306 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2307                 [specify prefix directory for installed bdw-gc package.
2308                  Equivalent to --with-target-bdw-gc-include=PATH/include
2309                  plus --with-target-bdw-gc-lib=PATH/lib])])
2310 AC_ARG_WITH([target-bdw-gc-include],
2311 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2312                 [specify directories for installed bdw-gc include files])])
2313 AC_ARG_WITH([target-bdw-gc-lib],
2314 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2315                 [specify directories for installed bdw-gc library])])
2316
2317 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2318   AC_MSG_CHECKING([for bdw garbage collector])
2319   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2320     dnl no bdw-gw options, assume default locations
2321     AC_MSG_RESULT([using bdw-gc in default locations])
2322   else
2323     dnl bdw-gw options, first error checking, complete checking in libobjc
2324     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2325       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2326     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2327       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2328     else
2329       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2330     fi
2331   fi
2332 esac
2333
2334 # Disable libitm, libsanitizer, libvtv if we're not building C++
2335 case ,${enable_languages}, in
2336   *,c++,*)
2337     # Disable libitm, libsanitizer if we're not building libstdc++
2338     case "${noconfigdirs}" in
2339       *target-libstdc++-v3*)
2340         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2341         ;;
2342       *) ;;
2343     esac
2344     ;;
2345   *)
2346     noconfigdirs="$noconfigdirs target-libitm target-libsanitizer target-libvtv"
2347     ;;
2348 esac
2349
2350 # If gcc/ is not in the source tree then we'll not be building a
2351 # target compiler, assume in that case we don't want to build any
2352 # target libraries or tools.
2353 #
2354 # This was added primarily for the benefit for binutils-gdb who reuse
2355 # this configure script, but don't always have target tools available.
2356 if test ! -d ${srcdir}/gcc; then
2357    skipdirs="${skipdirs} ${target_configdirs}"
2358 fi
2359
2360 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2361 # $build_configdirs and $target_configdirs.
2362 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2363
2364 notsupp=""
2365 for dir in . $skipdirs $noconfigdirs ; do
2366   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2367   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2368     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2369     if test -r $srcdir/$dirname/configure ; then
2370       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2371         true
2372       else
2373         notsupp="$notsupp $dir"
2374       fi
2375     fi
2376   fi
2377   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2378     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2379     if test -r $srcdir/$dirname/configure ; then
2380       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2381         true
2382       else
2383         notsupp="$notsupp $dir"
2384       fi
2385     fi
2386   fi
2387   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2388     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2389     if test -r $srcdir/$dirname/configure ; then
2390       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2391         true
2392       else
2393         notsupp="$notsupp $dir"
2394       fi
2395     fi
2396   fi
2397 done
2398
2399 # Quietly strip out all directories which aren't configurable in this tree.
2400 # This relies on all configurable subdirectories being autoconfiscated, which
2401 # is now the case.
2402 build_configdirs_all="$build_configdirs"
2403 build_configdirs=
2404 for i in ${build_configdirs_all} ; do
2405   j=`echo $i | sed -e s/build-//g`
2406   if test -f ${srcdir}/$j/configure ; then
2407     build_configdirs="${build_configdirs} $i"
2408   fi
2409 done
2410
2411 configdirs_all="$configdirs"
2412 configdirs=
2413 for i in ${configdirs_all} ; do
2414   if test -f ${srcdir}/$i/configure ; then
2415     configdirs="${configdirs} $i"
2416   fi
2417 done
2418
2419 target_configdirs_all="$target_configdirs"
2420 target_configdirs=
2421 for i in ${target_configdirs_all} ; do
2422   j=`echo $i | sed -e s/target-//g`
2423   if test -f ${srcdir}/$j/configure ; then
2424     target_configdirs="${target_configdirs} $i"
2425   fi
2426 done
2427
2428 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2429 # so we have to add it after the preceding checks.
2430 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2431 then
2432   case " $configdirs " in
2433     *" libiberty "*)
2434       # If we can build libiberty, we can also build libiberty-linker-plugin.
2435       configdirs="$configdirs libiberty-linker-plugin"
2436       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2437         --with-libiberty=../libiberty-linker-plugin";;
2438     *)
2439       AC_MSG_ERROR([libiberty missing]);;
2440   esac
2441 fi
2442
2443 # Sometimes we have special requirements for the host libiberty.
2444 extra_host_libiberty_configure_flags=
2445 case " $configdirs " in
2446   *" lto-plugin "* | *" libcc1 "* | *" gdbserver "*)
2447     # When these are to be built as shared libraries, the same applies to
2448     # libiberty.
2449     extra_host_libiberty_configure_flags=--enable-shared
2450     ;;
2451 esac
2452 AC_SUBST(extra_host_libiberty_configure_flags)
2453
2454 # Sometimes we have special requirements for the host zlib.
2455 extra_host_zlib_configure_flags=
2456 case " $configdirs " in
2457   *" bfd "*)
2458     # When bfd is to be built as a shared library, the same applies to
2459     # zlib.
2460     if test "$enable_shared" = "yes"; then
2461       extra_host_zlib_configure_flags=--enable-host-shared
2462     fi
2463     ;;
2464 esac
2465 AC_SUBST(extra_host_zlib_configure_flags)
2466
2467 # Produce a warning message for the subdirs we can't configure.
2468 # This isn't especially interesting in the Cygnus tree, but in the individual
2469 # FSF releases, it's important to let people know when their machine isn't
2470 # supported by the one or two programs in a package.
2471
2472 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2473   # If $appdirs is non-empty, at least one of those directories must still
2474   # be configured, or we error out.  (E.g., if the gas release supports a
2475   # specified target in some subdirs but not the gas subdir, we shouldn't
2476   # pretend that all is well.)
2477   if test -n "$appdirs" ; then
2478     for dir in $appdirs ; do
2479       if test -r $dir/Makefile.in ; then
2480         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2481           appdirs=""
2482           break
2483         fi
2484         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2485           appdirs=""
2486           break
2487         fi
2488       fi
2489     done
2490     if test -n "$appdirs" ; then
2491       echo "*** This configuration is not supported by this package." 1>&2
2492       exit 1
2493     fi
2494   fi
2495   # Okay, some application will build, or we don't care to check.  Still
2496   # notify of subdirs not getting built.
2497   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2498   echo "    ${notsupp}" 1>&2
2499   echo "    (Any other directories should still work fine.)" 1>&2
2500 fi
2501
2502 case "$host" in
2503   *msdosdjgpp*)
2504     enable_gdbtk=no ;;
2505 esac
2506
2507 # To find our prefix, in gcc_cv_tool_prefix.
2508 ACX_TOOL_DIRS
2509
2510 copy_dirs=
2511
2512 AC_ARG_WITH([build-sysroot],
2513   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2514                   [use sysroot as the system root during the build])],
2515   [if test x"$withval" != x ; then
2516      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2517    fi],
2518   [SYSROOT_CFLAGS_FOR_TARGET=])
2519 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2520
2521 AC_ARG_WITH([debug-prefix-map],
2522   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2523                   [map A to B, C to D ... in debug information])],
2524   [if test x"$withval" != x; then
2525      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2526      for debug_map in $withval; do
2527        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2528      done
2529    fi],
2530   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2531 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2532
2533 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2534 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2535 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2536 # We want to ensure that TARGET libraries (which we know are built with
2537 # gcc) are built with "-O2 -g", so include those options when setting
2538 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2539 if test "x$CFLAGS_FOR_TARGET" = x; then
2540   if test "x${is_cross_compiler}" = xyes; then
2541     CFLAGS_FOR_TARGET="-g -O2"
2542   else
2543     CFLAGS_FOR_TARGET=$CFLAGS
2544     case " $CFLAGS " in
2545       *" -O2 "*) ;;
2546       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2547     esac
2548     case " $CFLAGS " in
2549       *" -g "* | *" -g3 "*) ;;
2550       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2551     esac
2552   fi
2553 fi
2554 AC_SUBST(CFLAGS_FOR_TARGET)
2555
2556 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2557   if test "x${is_cross_compiler}" = xyes; then
2558     CXXFLAGS_FOR_TARGET="-g -O2"
2559   else
2560     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2561     case " $CXXFLAGS " in
2562       *" -O2 "*) ;;
2563       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2564     esac
2565     case " $CXXFLAGS " in
2566       *" -g "* | *" -g3 "*) ;;
2567       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2568     esac
2569   fi
2570 fi
2571 AC_SUBST(CXXFLAGS_FOR_TARGET)
2572
2573 AC_SUBST(LDFLAGS_FOR_TARGET)
2574
2575 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2576 # the named directory are copied to $(tooldir)/sys-include.
2577 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2578   if test x${is_cross_compiler} = xno ; then
2579     echo 1>&2 '***' --with-headers is only supported when cross compiling
2580     exit 1
2581   fi
2582   if test x"${with_headers}" != xyes ; then
2583     x=${gcc_cv_tool_prefix}
2584     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2585   fi
2586 fi
2587
2588 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2589 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2590 # are permitted.
2591 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2592   if test x${is_cross_compiler} = xno ; then
2593     echo 1>&2 '***' --with-libs is only supported when cross compiling
2594     exit 1
2595   fi
2596   if test x"${with_libs}" != xyes ; then
2597     # Copy the libraries in reverse order, so that files in the first named
2598     # library override files in subsequent libraries.
2599     x=${gcc_cv_tool_prefix}
2600     for l in ${with_libs}; do
2601       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2602     done
2603   fi
2604 fi
2605
2606 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2607 #
2608 # This is done by determining whether or not the appropriate directory
2609 # is available, and by checking whether or not specific configurations
2610 # have requested that this magic not happen.
2611 #
2612 # The command line options always override the explicit settings in
2613 # configure.ac, and the settings in configure.ac override this magic.
2614 #
2615 # If the default for a toolchain is to use GNU as and ld, and you don't
2616 # want to do that, then you should use the --without-gnu-as and
2617 # --without-gnu-ld options for the configure script.  Similarly, if
2618 # the default is to use the included zlib and you don't want to do that,
2619 # you should use the --with-system-zlib option for the configure script.
2620
2621 if test x${use_gnu_as} = x &&
2622    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2623   with_gnu_as=yes
2624   extra_host_args="$extra_host_args --with-gnu-as"
2625 fi
2626
2627 if test x${use_gnu_ld} = x &&
2628    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2629   with_gnu_ld=yes
2630   extra_host_args="$extra_host_args --with-gnu-ld"
2631 fi
2632
2633 if test x${use_included_zlib} = x &&
2634    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2635   :
2636 else
2637   with_system_zlib=yes
2638   extra_host_args="$extra_host_args --with-system-zlib"
2639 fi
2640
2641 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2642 # can detect this case.
2643
2644 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2645   with_newlib=yes
2646   extra_host_args="$extra_host_args --with-newlib"
2647 fi
2648
2649 # Handle ${copy_dirs}
2650 set fnord ${copy_dirs}
2651 shift
2652 while test $# != 0 ; do
2653   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2654     :
2655   else
2656     echo Copying $1 to $2
2657
2658     # Use the install script to create the directory and all required
2659     # parent directories.
2660     if test -d $2 ; then
2661       :
2662     else
2663       echo >config.temp
2664       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2665     fi
2666
2667     # Copy the directory, assuming we have tar.
2668     # FIXME: Should we use B in the second tar?  Not all systems support it.
2669     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2670
2671     # It is the responsibility of the user to correctly adjust all
2672     # symlinks.  If somebody can figure out how to handle them correctly
2673     # here, feel free to add the code.
2674
2675     echo $1 > $2/COPIED
2676   fi
2677   shift; shift
2678 done
2679
2680 # Determine a target-dependent exec_prefix that the installed
2681 # gcc will search in.  Keep this list sorted by triplet, with
2682 # the *-*-osname triplets last.
2683 md_exec_prefix=
2684 case "${target}" in
2685   i[[34567]]86-pc-msdosdjgpp*)
2686     md_exec_prefix=/dev/env/DJDIR/bin
2687     ;;
2688   *-*-hpux* | \
2689   *-*-nto-qnx* | \
2690   *-*-solaris2*)
2691     md_exec_prefix=/usr/ccs/bin
2692     ;;
2693 esac
2694
2695 extra_arflags_for_target=
2696 extra_nmflags_for_target=
2697 extra_ranlibflags_for_target=
2698 target_makefile_frag=/dev/null
2699 case "${target}" in
2700   spu-*-*)
2701     target_makefile_frag="config/mt-spu"
2702     ;;
2703   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2704     target_makefile_frag="config/mt-sde"
2705     ;;
2706   mipsisa*-*-elfoabi*)
2707     target_makefile_frag="config/mt-mips-elfoabi"
2708     ;;
2709   mips*-*-*linux* | mips*-*-gnu*)
2710     target_makefile_frag="config/mt-mips-gnu"
2711     ;;
2712   nios2-*-elf*)
2713     target_makefile_frag="config/mt-nios2-elf"
2714     ;;
2715   *-*-linux-android*)
2716     target_makefile_frag="config/mt-android"
2717     ;;
2718   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2719     target_makefile_frag="config/mt-gnu"
2720     ;;
2721   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2722     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2723     # commands to handle both 32-bit and 64-bit objects.  These flags are
2724     # harmless if we're using GNU nm or ar.
2725     extra_arflags_for_target=" -X32_64"
2726     extra_nmflags_for_target=" -B -X32_64"
2727     ;;
2728 esac
2729
2730 alphaieee_frag=/dev/null
2731 case $target in
2732   alpha*-*-*)
2733     # This just makes sure to use the -mieee option to build target libs.
2734     # This should probably be set individually by each library.
2735     alphaieee_frag="config/mt-alphaieee"
2736     ;;
2737 esac
2738
2739 # If --enable-target-optspace always use -Os instead of -O2 to build
2740 # the target libraries, similarly if it is not specified, use -Os
2741 # on selected platforms.
2742 ospace_frag=/dev/null
2743 case "${enable_target_optspace}:${target}" in
2744   yes:*)
2745     ospace_frag="config/mt-ospace"
2746     ;;
2747   :d30v-*)
2748     ospace_frag="config/mt-d30v"
2749     ;;
2750   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2751     ospace_frag="config/mt-ospace"
2752     ;;
2753   no:* | :*)
2754     ;;
2755   *)
2756     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2757     ;;
2758 esac
2759
2760 # Some systems (e.g., one of the i386-aix systems the gas testers are
2761 # using) don't handle "\$" correctly, so don't use it here.
2762 tooldir='${exec_prefix}'/${target_noncanonical}
2763 build_tooldir=${tooldir}
2764
2765 # Create a .gdbinit file which runs the one in srcdir
2766 # and tells GDB to look there for source files.
2767
2768 if test -r ${srcdir}/.gdbinit ; then
2769   case ${srcdir} in
2770     .) ;;
2771     *) cat > ./.gdbinit <<EOF
2772 # ${NO_EDIT}
2773 dir ${srcdir}
2774 dir .
2775 source ${srcdir}/.gdbinit
2776 EOF
2777     ;;
2778   esac
2779 fi
2780
2781 # Make sure that the compiler is able to generate an executable.  If it
2782 # can't, we are probably in trouble.  We don't care whether we can run the
2783 # executable--we might be using a cross compiler--we only care whether it
2784 # can be created.  At this point the main configure script has set CC.
2785 we_are_ok=no
2786 echo "int main () { return 0; }" > conftest.c
2787 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2788 if test $? = 0 ; then
2789   if test -s conftest || test -s conftest.exe ; then
2790     we_are_ok=yes
2791   fi
2792 fi
2793 case $we_are_ok in
2794   no)
2795     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2796     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2797     rm -f conftest*
2798     exit 1
2799     ;;
2800 esac
2801 rm -f conftest*
2802
2803 # Decide which environment variable is used to find dynamic libraries.
2804 case "${host}" in
2805   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2806   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2807   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2808   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2809 esac
2810
2811 # On systems where the dynamic library environment variable is PATH,
2812 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2813 # built executables to PATH.
2814 if test "$RPATH_ENVVAR" = PATH; then
2815   GCC_SHLIB_SUBDIR=/shlib
2816 else
2817   GCC_SHLIB_SUBDIR=
2818 fi
2819
2820 # Adjust the toplevel makefile according to whether bootstrap was selected.
2821 case $enable_bootstrap in
2822   yes)
2823     bootstrap_suffix=bootstrap
2824     BUILD_CONFIG=bootstrap-debug
2825     ;;
2826   no)
2827     bootstrap_suffix=no-bootstrap
2828     BUILD_CONFIG=
2829     ;;
2830 esac
2831
2832 AC_MSG_CHECKING(for default BUILD_CONFIG)
2833
2834 AC_ARG_WITH([build-config],
2835   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2836                   [use config/NAME.mk build configuration])],
2837   [case $with_build_config in
2838    yes) with_build_config= ;;
2839    no) with_build_config= BUILD_CONFIG= ;;
2840    esac])
2841
2842 if test "x${with_build_config}" != x; then
2843   BUILD_CONFIG=$with_build_config
2844 else
2845   case $BUILD_CONFIG in
2846   bootstrap-debug)
2847     if echo "int f (void) { return 0; }" > conftest.c &&
2848        ${CC} -c conftest.c &&
2849        mv conftest.o conftest.o.g0 &&
2850        ${CC} -c -g conftest.c &&
2851        mv conftest.o conftest.o.g &&
2852        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2853       :
2854     else
2855       BUILD_CONFIG=
2856     fi
2857     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2858     ;;
2859   esac
2860 fi
2861 AC_MSG_RESULT($BUILD_CONFIG)
2862 AC_SUBST(BUILD_CONFIG)
2863
2864 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2865 AC_MSG_CHECKING([for --enable-vtable-verify])
2866 AC_ARG_ENABLE(vtable-verify,
2867 [AS_HELP_STRING([--enable-vtable-verify],
2868                 [Enable vtable verification feature])],
2869 [case "$enableval" in
2870  yes) enable_vtable_verify=yes ;;
2871  no)  enable_vtable_verify=no ;;
2872  *)   enable_vtable_verify=no;;
2873  esac],
2874 [enable_vtable_verify=no])
2875 AC_MSG_RESULT($enable_vtable_verify)
2876
2877 # Record target_configdirs and the configure arguments for target and
2878 # build configuration in Makefile.
2879 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2880 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2881 bootstrap_fixincludes=no
2882
2883 # If we are building libgomp, bootstrap it.
2884 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2885   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2886 fi
2887
2888 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2889 # or bootstrap-ubsan, bootstrap it.
2890 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2891   case "$BUILD_CONFIG" in
2892     *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
2893       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2894       bootstrap_fixincludes=yes
2895       ;;
2896   esac
2897 fi
2898
2899 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2900 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2901    test "$enable_vtable_verify" != no; then
2902   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2903 fi
2904
2905 # If we are building libatomic and the list of enabled languages includes the
2906 # D frontend, bootstrap it.
2907 if echo " ${target_configdirs} " | grep " libatomic " > /dev/null 2>&1; then
2908   case ,${enable_languages}, in
2909     *,d,*)
2910       bootstrap_target_libs=${bootstrap_target_libs}target-libatomic,
2911       ;;
2912   esac
2913 fi
2914
2915 # Determine whether gdb needs tk/tcl or not.
2916 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2917 # and in that case we want gdb to be built without tk.  Ugh!
2918 # In fact I believe gdb is the *only* package directly dependent on tk,
2919 # so we should be able to put the 'maybe's in unconditionally and
2920 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2921 # 100% sure that that's safe though.
2922
2923 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2924 case "$enable_gdbtk" in
2925   no)
2926     GDB_TK="" ;;
2927   yes)
2928     GDB_TK="${gdb_tk}" ;;
2929   *)
2930     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2931     # distro.  Eventually someone will fix this and move Insight, nee
2932     # gdbtk to a separate directory.
2933     if test -d ${srcdir}/gdb/gdbtk ; then
2934       GDB_TK="${gdb_tk}"
2935     else
2936       GDB_TK=""
2937     fi
2938     ;;
2939 esac
2940 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2941 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2942
2943 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
2944 # else does, only include them if one of these is built.  The Makefile
2945 # provides the ordering, so it's enough here to add to the list.
2946 case " ${configdirs} " in
2947   *\ gdb\ *)
2948     configdirs="${configdirs} gnulib gdbsupport"
2949     ;;
2950   *\ gdbserver\ *)
2951     configdirs="${configdirs} gnulib gdbsupport"
2952     ;;
2953   *\ sim\ *)
2954     configdirs="${configdirs} gnulib"
2955     ;;
2956 esac
2957
2958 # Strip out unwanted targets.
2959
2960 # While at that, we remove Makefiles if we were started for recursive
2961 # configuration, so that the top-level Makefile reconfigures them,
2962 # like we used to do when configure itself was recursive.
2963
2964 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2965 # but now we're fixing up the Makefile ourselves with the additional
2966 # commands passed to AC_CONFIG_FILES.  Use separate variables
2967 # extrasub-{build,host,target} not because there is any reason to split
2968 # the substitutions up that way, but only to remain below the limit of
2969 # 99 commands in a script, for HP-UX sed.
2970
2971 # Do not nest @if/@endif or @unless/@endunless pairs, because
2972 # configure will not warn you at all.
2973
2974 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2975   yes:yes:*\ gold\ *:*,c++,*) ;;
2976   yes:yes:*\ gold\ *:*)
2977     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2978     ;;
2979 esac
2980
2981 extrasub_build=
2982 for module in ${build_configdirs} ; do
2983   if test -z "${no_recursion}" \
2984      && test -f ${build_subdir}/${module}/Makefile; then
2985     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2986     rm -f ${build_subdir}/${module}/Makefile
2987   fi
2988   extrasub_build="$extrasub_build
2989 /^@if build-$module\$/d
2990 /^@endif build-$module\$/d
2991 /^@unless build-$module\$/,/^@endunless build-$module\$/d
2992 /^@if build-$module-$bootstrap_suffix\$/d
2993 /^@endif build-$module-$bootstrap_suffix\$/d
2994 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
2995 done
2996 extrasub_host=
2997 for module in ${configdirs} ; do
2998   if test -z "${no_recursion}"; then
2999     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
3000       if test -f ${file}; then
3001         echo 1>&2 "*** removing ${file} to force reconfigure"
3002         rm -f ${file}
3003       fi
3004     done
3005   fi
3006   case ${module},${bootstrap_fixincludes} in
3007     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
3008     *) host_bootstrap_suffix=$bootstrap_suffix ;;
3009   esac
3010   extrasub_host="$extrasub_host
3011 /^@if $module\$/d
3012 /^@endif $module\$/d
3013 /^@unless $module\$/,/^@endunless $module\$/d
3014 /^@if $module-$host_bootstrap_suffix\$/d
3015 /^@endif $module-$host_bootstrap_suffix\$/d
3016 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
3017 done
3018 extrasub_target=
3019 for module in ${target_configdirs} ; do
3020   if test -z "${no_recursion}" \
3021      && test -f ${target_subdir}/${module}/Makefile; then
3022     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
3023     rm -f ${target_subdir}/${module}/Makefile
3024   fi
3025
3026   # We only bootstrap target libraries listed in bootstrap_target_libs.
3027   case $bootstrap_target_libs in
3028     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
3029     *) target_bootstrap_suffix=no-bootstrap ;;
3030   esac
3031
3032   extrasub_target="$extrasub_target
3033 /^@if target-$module\$/d
3034 /^@endif target-$module\$/d
3035 /^@unless target-$module\$/,/^@endunless target-$module\$/d
3036 /^@if target-$module-$target_bootstrap_suffix\$/d
3037 /^@endif target-$module-$target_bootstrap_suffix\$/d
3038 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
3039 done
3040
3041 # Do the final fixup along with target modules.
3042 extrasub_target="$extrasub_target
3043 /^@if /,/^@endif /d
3044 /^@unless /d
3045 /^@endunless /d"
3046
3047 if test "$enable_pgo_build" != "no"; then
3048   extrasub_build="$extrasub_build
3049 /^@if pgo-build\$/d
3050 /^@endif pgo-build\$/d"
3051 fi
3052
3053 # Create the serialization dependencies.  This uses a temporary file.
3054
3055 AC_ARG_ENABLE([serial-configure],
3056 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
3057                 [force sequential configuration of
3058                  sub-packages for the host, target or build
3059                  machine, or all sub-packages])])
3060
3061 case ${enable_serial_configure} in
3062   yes)
3063     enable_serial_build_configure=yes
3064     enable_serial_host_configure=yes
3065     enable_serial_target_configure=yes
3066     ;;
3067 esac
3068
3069 # These force 'configure's to be done one at a time, to avoid problems
3070 # with contention over a shared config.cache.
3071 rm -f serdep.tmp
3072 echo '# serdep.tmp' > serdep.tmp
3073 olditem=
3074 test "x${enable_serial_build_configure}" = xyes &&
3075 for item in ${build_configdirs} ; do
3076   case ${olditem} in
3077     "") ;;
3078     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
3079   esac
3080   olditem=${item}
3081 done
3082 olditem=
3083 test "x${enable_serial_host_configure}" = xyes &&
3084 for item in ${configdirs} ; do
3085   case ${olditem} in
3086     "") ;;
3087     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
3088   esac
3089   olditem=${item}
3090 done
3091 olditem=
3092 test "x${enable_serial_target_configure}" = xyes &&
3093 for item in ${target_configdirs} ; do
3094   case ${olditem} in
3095     "") ;;
3096     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
3097   esac
3098   olditem=${item}
3099 done
3100 serialization_dependencies=serdep.tmp
3101 AC_SUBST_FILE(serialization_dependencies)
3102
3103 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
3104 # target, nonopt, and variable assignments.  These are the ones we
3105 # might not want to pass down to subconfigures.  The exception being
3106 # --cache-file=/dev/null, which is used to turn off the use of cache
3107 # files altogether, and which should be passed on to subconfigures.
3108 # Also strip program-prefix, program-suffix, and program-transform-name,
3109 # so that we can pass down a consistent program-transform-name.
3110 baseargs=
3111 tbaseargs=
3112 keep_next=no
3113 skip_next=no
3114 eval "set -- $ac_configure_args"
3115 for ac_arg
3116 do
3117   if test X"$skip_next" = X"yes"; then
3118     skip_next=no
3119     continue
3120   fi
3121   if test X"$keep_next" = X"yes"; then
3122     case $ac_arg in
3123       *\'*)
3124         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3125     esac
3126     baseargs="$baseargs '$ac_arg'"
3127     tbaseargs="$tbaseargs '$ac_arg'"
3128     keep_next=no
3129     continue
3130   fi
3131
3132   # Handle separated arguments.  Based on the logic generated by
3133   # autoconf 2.59.
3134   case $ac_arg in
3135     *=* | --config-cache | -C | -disable-* | --disable-* \
3136       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3137       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3138       | -with-* | --with-* | -without-* | --without-* | --x)
3139       separate_arg=no
3140       ;;
3141     -*)
3142       separate_arg=yes
3143       ;;
3144     *)
3145       separate_arg=no
3146       ;;
3147   esac
3148
3149   skip_targ=no
3150   case $ac_arg in
3151 changequote(,)
3152   --with-* | --without-*)
3153     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3154
3155     case $libopt in
3156     *[-_]include)
3157       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3158       ;;
3159     *[-_]lib)
3160       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3161       ;;
3162     *)
3163       lib=$libopt
3164       ;;
3165     esac
3166 changequote([,])
3167
3168     case $lib in
3169     mpc | mpfr | gmp | isl)
3170       # If we're processing --with-$lib, --with-$lib-include or
3171       # --with-$lib-lib, for one of the libs above, and target is
3172       # different from host, don't pass the current argument to any
3173       # target library's configure.
3174       if test x$is_cross_compiler = xyes; then
3175         skip_targ=yes
3176       fi
3177       ;;
3178     esac
3179     ;;
3180   esac
3181
3182   case "$ac_arg" in
3183     --cache-file=/dev/null | \
3184     -cache-file=/dev/null )
3185       # Handled here to avoid the test to skip args below.
3186       baseargs="$baseargs '$ac_arg'"
3187       tbaseargs="$tbaseargs '$ac_arg'"
3188       # Assert: $separate_arg should always be no.
3189       keep_next=$separate_arg
3190       ;;
3191     --no*)
3192       continue
3193       ;;
3194     --c* | \
3195     --sr* | \
3196     --ho* | \
3197     --bu* | \
3198     --t* | \
3199     --program-* | \
3200     -cache_file* | \
3201     -srcdir* | \
3202     -host* | \
3203     -build* | \
3204     -target* | \
3205     -program-prefix* | \
3206     -program-suffix* | \
3207     -program-transform-name* )
3208       skip_next=$separate_arg
3209       continue
3210       ;;
3211     -*)
3212       # An option.  Add it.
3213       case $ac_arg in
3214         *\'*)
3215           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3216       esac
3217       baseargs="$baseargs '$ac_arg'"
3218       if test X"$skip_targ" = Xno; then
3219         tbaseargs="$tbaseargs '$ac_arg'"
3220       fi
3221       keep_next=$separate_arg
3222       ;;
3223     *)
3224       # Either a variable assignment, or a nonopt (triplet).  Don't
3225       # pass it down; let the Makefile handle this.
3226       continue
3227       ;;
3228   esac
3229 done
3230 # Remove the initial space we just introduced and, as these will be
3231 # expanded by make, quote '$'.
3232 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3233
3234 # Add in --program-transform-name, after --program-prefix and
3235 # --program-suffix have been applied to it.  Autoconf has already
3236 # doubled dollar signs and backslashes in program_transform_name; we want
3237 # the backslashes un-doubled, and then the entire thing wrapped in single
3238 # quotes, because this will be expanded first by make and then by the shell.
3239 # Also, because we want to override the logic in subdir configure scripts to
3240 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3241 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3242 ${program_transform_name}
3243 EOF_SED
3244 gcc_transform_name=`cat conftestsed.out`
3245 rm -f conftestsed.out
3246 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3247 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3248 if test "$silent" = yes; then
3249   baseargs="$baseargs --silent"
3250   tbaseargs="$tbaseargs --silent"
3251 fi
3252 baseargs="$baseargs --disable-option-checking"
3253 tbaseargs="$tbaseargs --disable-option-checking"
3254
3255 # Record and document user additions to sub configure arguments.
3256 AC_ARG_VAR([build_configargs],
3257            [additional configure arguments for build directories])
3258 AC_ARG_VAR([host_configargs],
3259            [additional configure arguments for host directories])
3260 AC_ARG_VAR([target_configargs],
3261            [additional configure arguments for target directories])
3262
3263 # For the build-side libraries, we just need to pretend we're native,
3264 # and not use the same cache file.  Multilibs are neither needed nor
3265 # desired.  We can't even use the same cache file for all build-side
3266 # libraries, as they're compiled differently; some with C, some with
3267 # C++ or with different feature-enabling options.
3268 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3269
3270 # For host modules, accept cache file option, or specification as blank.
3271 case "${cache_file}" in
3272 "") # empty
3273   cache_file_option="" ;;
3274 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3275   cache_file_option="--cache-file=${cache_file}" ;;
3276 *) # relative path
3277   cache_file_option="--cache-file=../${cache_file}" ;;
3278 esac
3279
3280 # Host dirs don't like to share a cache file either, horribly enough.
3281 # This seems to be due to autoconf 2.5x stupidity.
3282 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3283
3284 target_configargs="$target_configargs ${tbaseargs}"
3285
3286 # Passing a --with-cross-host argument lets the target libraries know
3287 # whether they are being built with a cross-compiler or being built
3288 # native.  However, it would be better to use other mechanisms to make the
3289 # sorts of decisions they want to make on this basis.  Please consider
3290 # this option to be deprecated.  FIXME.
3291 if test x${is_cross_compiler} = xyes ; then
3292   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3293 fi
3294
3295 # Special user-friendly check for native x86_64-linux build, if
3296 # multilib is not explicitly enabled.
3297 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3298   x86_64-*linux*:yes:$build:$build:)
3299     # Make sure we have a development environment that handles 32-bit
3300     dev64=no
3301     echo "int main () { return 0; }" > conftest.c
3302     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3303     if test $? = 0 ; then
3304       if test -s conftest || test -s conftest.exe ; then
3305         dev64=yes
3306       fi
3307     fi
3308     rm -f conftest*
3309     if test x${dev64} != xyes ; then
3310       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.])
3311     fi
3312     ;;
3313 esac
3314
3315 # Default to --enable-multilib.
3316 if test x${enable_multilib} = x ; then
3317   target_configargs="--enable-multilib ${target_configargs}"
3318 fi
3319
3320 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3321 # changed from the earlier setting of with_newlib.
3322 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3323   target_configargs="--with-newlib ${target_configargs}"
3324 fi
3325
3326 # Different target subdirs use different values of certain variables
3327 # (notably CXX).  Worse, multilibs use *lots* of different values.
3328 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3329 # it doesn't automatically accept command-line overrides of them.
3330 # This means it's not safe for target subdirs to share a cache file,
3331 # which is disgusting, but there you have it.  Hopefully this can be
3332 # fixed in future.  It's still worthwhile to use a cache file for each
3333 # directory.  I think.
3334
3335 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3336 # We need to pass --target, as newer autoconf's requires consistency
3337 # for target_alias and gcc doesn't manage it consistently.
3338 target_configargs="--cache-file=./config.cache ${target_configargs}"
3339
3340 FLAGS_FOR_TARGET=
3341 case " $target_configdirs " in
3342  *" newlib "*)
3343   case " $target_configargs " in
3344   *" --with-newlib "*)
3345    case "$target" in
3346     *-cygwin*)
3347       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3348       ;;
3349    esac
3350
3351    # If we're not building GCC, don't discard standard headers.
3352    if test -d ${srcdir}/gcc; then
3353      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3354
3355      if test "${build}" != "${host}"; then
3356        # On Canadian crosses, CC_FOR_TARGET will have already been set
3357        # by `configure', so we won't have an opportunity to add -Bgcc/
3358        # to it.  This is right: we don't want to search that directory
3359        # for binaries, but we want the header files in there, so add
3360        # them explicitly.
3361        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3362
3363        # Someone might think of using the pre-installed headers on
3364        # Canadian crosses, in case the installed compiler is not fully
3365        # compatible with the compiler being built.  In this case, it
3366        # would be better to flag an error than risking having
3367        # incompatible object files being constructed.  We can't
3368        # guarantee that an error will be flagged, but let's hope the
3369        # compiler will do it, when presented with incompatible header
3370        # files.
3371      fi
3372    fi
3373
3374    case "${target}-${is_cross_compiler}" in
3375    i[[3456789]]86-*-linux*-no)
3376       # Here host == target, so we don't need to build gcc,
3377       # so we don't want to discard standard headers.
3378       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3379       ;;
3380    *)
3381       # If we're building newlib, use its generic headers last, but search
3382       # for any libc-related directories first (so make it the last -B
3383       # switch).
3384       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3385
3386       # If we're building libgloss, find the startup file, simulator library
3387       # and linker script.
3388       case " $target_configdirs " in
3389         *" libgloss "*)
3390         # Look for startup file, simulator library and maybe linker script.
3391         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3392         # Look for libnosys.a in case the target needs it.
3393         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3394         # Most targets have the linker script in the source directory.
3395         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3396         ;;
3397       esac
3398       ;;
3399    esac
3400    ;;
3401   esac
3402   ;;
3403 esac
3404
3405 case "$target" in
3406   x86_64-*mingw* | *-w64-mingw*)
3407   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3408   # however, use a symlink named 'mingw' in ${prefix} .
3409     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3410     ;;
3411   *-mingw*)
3412   # MinGW can't be handled as Cygwin above since it does not use newlib.
3413     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3414     ;;
3415 esac
3416
3417 # Allow the user to override the flags for
3418 # our build compiler if desired.
3419 if test x"${build}" = x"${host}" ; then
3420   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3421   CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
3422   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3423   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3424 fi
3425
3426 # On Canadian crosses, we'll be searching the right directories for
3427 # the previously-installed cross compiler, so don't bother to add
3428 # flags for directories within the install tree of the compiler
3429 # being built; programs in there won't even run.
3430 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3431   # Search for pre-installed headers if nothing else fits.
3432   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3433 fi
3434
3435 if test "x${use_gnu_ld}" = x &&
3436    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3437   # Arrange for us to find uninstalled linker scripts.
3438   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3439 fi
3440
3441 # Search for other target-specific linker scripts and such.
3442 case "${target}" in
3443   mep*)
3444     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3445     ;;
3446   # The VxWorks support for shared libraries is getting in
3447   # incrementally.  Make sure it doesn't get activated implicitly:
3448   *vxworks*)
3449     if test "${enable_shared-unset}" = unset ; then
3450       enable_shared=no
3451       # So the build of libraries knows ...
3452       target_configargs="${target_configargs} --disable-shared"
3453       # So gcc knows ...
3454       host_configargs="${host_configargs} --disable-shared"
3455     fi
3456     ;;
3457 esac
3458
3459 # Makefile fragments.
3460 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3461 do
3462   eval fragval=\$$frag
3463   if test $fragval != /dev/null; then
3464     eval $frag=${srcdir}/$fragval
3465   fi
3466 done
3467 AC_SUBST_FILE(host_makefile_frag)
3468 AC_SUBST_FILE(target_makefile_frag)
3469 AC_SUBST_FILE(alphaieee_frag)
3470 AC_SUBST_FILE(ospace_frag)
3471
3472 # Miscellanea: directories, flags, etc.
3473 AC_SUBST(RPATH_ENVVAR)
3474 AC_SUBST(GCC_SHLIB_SUBDIR)
3475 AC_SUBST(tooldir)
3476 AC_SUBST(build_tooldir)
3477 AC_SUBST(CONFIGURE_GDB_TK)
3478 AC_SUBST(GDB_TK)
3479 AC_SUBST(INSTALL_GDB_TK)
3480
3481 # Build module lists & subconfigure args.
3482 AC_SUBST(build_configargs)
3483 AC_SUBST(build_configdirs)
3484
3485 # Host module lists & subconfigure args.
3486 AC_SUBST(host_configargs)
3487 AC_SUBST(configdirs)
3488 AC_SUBST(target_configdirs)
3489
3490 # Target module lists & subconfigure args.
3491 AC_SUBST(target_configargs)
3492
3493
3494 # Build tools.
3495 AC_SUBST(AR_FOR_BUILD)
3496 AC_SUBST(AS_FOR_BUILD)
3497 AC_SUBST(CC_FOR_BUILD)
3498 AC_SUBST(CFLAGS_FOR_BUILD)
3499 AC_SUBST(CPP_FOR_BUILD)
3500 AC_SUBST(CPPFLAGS_FOR_BUILD)
3501 AC_SUBST(CXXFLAGS_FOR_BUILD)
3502 AC_SUBST(CXX_FOR_BUILD)
3503 AC_SUBST(DLLTOOL_FOR_BUILD)
3504 AC_SUBST(DSYMUTIL_FOR_BUILD)
3505 AC_SUBST(GFORTRAN_FOR_BUILD)
3506 AC_SUBST(GOC_FOR_BUILD)
3507 AC_SUBST(GDC_FOR_BUILD)
3508 AC_SUBST(LDFLAGS_FOR_BUILD)
3509 AC_SUBST(LD_FOR_BUILD)
3510 AC_SUBST(NM_FOR_BUILD)
3511 AC_SUBST(RANLIB_FOR_BUILD)
3512 AC_SUBST(WINDMC_FOR_BUILD)
3513 AC_SUBST(WINDRES_FOR_BUILD)
3514
3515 # Generate default definitions for YACC, M4, LEX and other programs that run
3516 # on the build machine.  These are used if the Makefile can't locate these
3517 # programs in objdir.
3518 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3519
3520 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3521 case " $build_configdirs " in
3522   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3523 esac
3524
3525 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3526 case " $build_configdirs " in
3527   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3528 esac
3529
3530 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3531 case " $build_configdirs " in
3532   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3533 esac
3534
3535 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3536 case " $build_configdirs " in
3537   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3538   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3539 esac
3540
3541 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3542 case " $build_configdirs " in
3543   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3544 esac
3545
3546 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3547 case " $build_configdirs " in
3548   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3549   *)
3550 changequote(,)
3551     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3552     # higher, else we use the "missing" dummy.
3553     if ${MAKEINFO} --version \
3554        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3555       :
3556     else
3557       MAKEINFO="$MISSING makeinfo"
3558     fi
3559     ;;
3560 changequote([,])
3561 esac
3562
3563 # FIXME: expect and dejagnu may become build tools?
3564
3565 AC_CHECK_PROGS(EXPECT, expect, expect)
3566 case " $configdirs " in
3567   *" expect "*)
3568     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3569     ;;
3570 esac
3571
3572 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3573 case " $configdirs " in
3574   *" dejagnu "*)
3575     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3576     ;;
3577 esac
3578
3579
3580 # Host tools.
3581 NCN_STRICT_CHECK_TOOLS(AR, ar)
3582 NCN_STRICT_CHECK_TOOLS(AS, as)
3583 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3584 NCN_STRICT_CHECK_TOOLS(DSYMUTIL, dsymutil)
3585 NCN_STRICT_CHECK_TOOLS(LD, ld)
3586 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3587 NCN_STRICT_CHECK_TOOLS(NM, nm)
3588 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3589 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3590 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3591 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3592 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3593 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3594 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3595 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3596 AC_SUBST(CC)
3597 AC_SUBST(CXX)
3598 AC_SUBST(CFLAGS)
3599 AC_SUBST(CXXFLAGS)
3600 AC_SUBST(GDC)
3601 AC_SUBST(GDCFLAGS)
3602
3603 # Target tools.
3604 AC_ARG_WITH([build-time-tools],
3605   [AS_HELP_STRING([--with-build-time-tools=PATH],
3606                   [use given path to find target tools during the build])],
3607   [case x"$withval" in
3608      x/*) ;;
3609      *)
3610        with_build_time_tools=
3611        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3612        ;;
3613    esac],
3614   [with_build_time_tools=])
3615
3616 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3617 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3618 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3619 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3620 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3621 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3622 NCN_STRICT_CHECK_TARGET_TOOLS(GM2_FOR_TARGET, gm2)
3623
3624 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3625 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3626 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3627 ACX_CHECK_INSTALLED_TARGET_TOOL(DSYMUTIL_FOR_TARGET, dsymutil)
3628 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3629 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3630 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3631 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3632 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3633 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3634 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3635 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3636 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3637 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3638 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3639
3640 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3641
3642 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3643 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3644 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3645 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3646 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3647                 [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],
3648                 c++)
3649 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3650                 [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],
3651                 c++)
3652 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3653 GCC_TARGET_TOOL(dsymutil, DSYMUTIL_FOR_TARGET, DSYMUTIL)
3654 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3655 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3656                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3657 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3658                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3659 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3660                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3661 GCC_TARGET_TOOL(gm2, GM2_FOR_TARGET, GM2,
3662                 [gcc/gm2 -B$$r/$(HOST_SUBDIR)/gcc/], m2)
3663 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3664 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3665 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3666 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3667 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3668 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3669 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3670 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3671 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3672 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3673 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3674
3675 AC_SUBST(FLAGS_FOR_TARGET)
3676 AC_SUBST(RAW_CXX_FOR_TARGET)
3677
3678 # Certain tools may need extra flags.
3679 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3680 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3681 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3682
3683 # When building target libraries, except in a Canadian cross, we use
3684 # the same toolchain as the compiler we just built.
3685 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3686 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3687 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3688 if test $host = $build; then
3689   case " $configdirs " in
3690     *" gcc "*)
3691       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3692       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3693       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3694       ;;
3695   esac
3696 fi
3697
3698 AC_SUBST(COMPILER_AS_FOR_TARGET)
3699 AC_SUBST(COMPILER_LD_FOR_TARGET)
3700 AC_SUBST(COMPILER_NM_FOR_TARGET)
3701
3702 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3703 AC_ARG_ENABLE(maintainer-mode,
3704 [AS_HELP_STRING([--enable-maintainer-mode],
3705                 [enable make rules and dependencies not useful
3706                  (and sometimes confusing) to the casual installer])],
3707       USE_MAINTAINER_MODE=$enableval,
3708       USE_MAINTAINER_MODE=no)
3709 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3710 AC_SUBST(MAINTAINER_MODE_TRUE)
3711 AC_SUBST(MAINTAINER_MODE_FALSE)
3712 if test "$USE_MAINTAINER_MODE" = yes; then
3713   MAINTAINER_MODE_TRUE=
3714   MAINTAINER_MODE_FALSE='#'
3715 else
3716   MAINTAINER_MODE_TRUE='#'
3717   MAINTAINER_MODE_FALSE=
3718 fi
3719 MAINT=$MAINTAINER_MODE_TRUE
3720 AC_SUBST(MAINT)dnl
3721
3722 # ---------------------
3723 # GCC bootstrap support
3724 # ---------------------
3725
3726 # Stage specific cflags for build.
3727 stage1_cflags="-g"
3728 case $build in
3729   vax-*-*)
3730     case ${GCC} in
3731       yes) stage1_cflags="-g -Wa,-J" ;;
3732       *) stage1_cflags="-g -J" ;;
3733     esac ;;
3734 esac
3735
3736 AC_SUBST(stage1_cflags)
3737
3738 # Enable --enable-checking in stage1 of the compiler.
3739 AC_ARG_ENABLE(stage1-checking,
3740 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3741                 [choose additional checking for stage1 of the compiler])],
3742 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3743 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3744   # For --disable-checking or implicit --enable-checking=release, avoid
3745   # setting --enable-checking=gc in the default stage1 checking for LTO
3746   # bootstraps.  See PR62077.
3747   case $BUILD_CONFIG in
3748     *lto*)
3749       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3750     *)
3751       stage1_checking=--enable-checking=yes,types;;
3752   esac
3753   if test "x$enable_checking" = x && \
3754      test -d ${srcdir}/gcc && \
3755      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3756     stage1_checking=--enable-checking=yes,types,extra
3757   fi
3758 else
3759   stage1_checking=--enable-checking=$enable_checking,types
3760 fi])
3761 AC_SUBST(stage1_checking)
3762
3763 # Enable -Werror in bootstrap stage2 and later.
3764 AC_ARG_ENABLE(werror,
3765 [AS_HELP_STRING([--enable-werror],
3766                 [enable -Werror in bootstrap stage2 and later])],
3767 [
3768 case ${enable_werror} in
3769   yes) stage2_werror_flag="--enable-werror-always" ;;
3770   *) stage2_werror_flag="" ;;
3771 esac
3772 ],
3773 [
3774 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3775   case $BUILD_CONFIG in
3776   bootstrap-debug)
3777       stage2_werror_flag="--enable-werror-always" ;;
3778   "")
3779       stage2_werror_flag="--enable-werror-always" ;;
3780   esac
3781 fi
3782 ])
3783
3784 AC_SUBST(stage2_werror_flag)
3785
3786 # Specify what files to not compare during bootstrap.
3787
3788 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3789 compare_exclusions="$compare_exclusions | gcc/m2/gm2-compiler-boot/M2Version*"
3790 compare_exclusions="$compare_exclusions | gcc/m2/gm2-compiler-boot/SYSTEM*"
3791 compare_exclusions="$compare_exclusions | gcc/m2/gm2version*"
3792 case "$target" in
3793   hppa*64*-*-hpux*) ;;
3794   powerpc*-ibm-aix*) compare_exclusions="$compare_exclusions | *libgomp*\$(objext)" ;;
3795 esac
3796 AC_SUBST(compare_exclusions)
3797
3798 AC_CONFIG_FILES([Makefile],
3799   [sed "$extrasub_build" Makefile |
3800    sed "$extrasub_host" |
3801    sed "$extrasub_target" > mf$$
3802    mv -f mf$$ Makefile],
3803   [extrasub_build="$extrasub_build"
3804    extrasub_host="$extrasub_host"
3805    extrasub_target="$extrasub_target"])
3806 AC_OUTPUT