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