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 http://gcc.gnu.org/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 $host in
1868   x86_64-*-darwin* | aarch64-*-darwin*) host_shared=yes ;;
1869   *) host_shared=no ;;
1870  esac])
1871 AC_SUBST(host_shared)
1872
1873 # Enable --enable-host-pie.
1874 AC_ARG_ENABLE(host-pie,
1875 [AS_HELP_STRING([--enable-host-pie],
1876        [build host code as PIE])])
1877 AC_SUBST(enable_host_pie)
1878
1879 if test x$enable_host_shared = xyes; then
1880   PICFLAG=-fPIC
1881 elif test x$enable_host_pie = xyes; then
1882   PICFLAG=-fPIE
1883 else
1884   PICFLAG=
1885 fi
1886
1887 AC_SUBST(PICFLAG)
1888
1889 # By default, C and C++ are the only stage 1 languages.
1890 stage1_languages=,c,
1891
1892 # Target libraries that we bootstrap.
1893 bootstrap_target_libs=,target-libgcc,
1894
1895 # Figure out what language subdirectories are present.
1896 # Look if the user specified --enable-languages="..."; if not, use
1897 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1898 # go away some day.
1899 # NB:  embedded tabs in this IF block -- do not untabify
1900 if test -d ${srcdir}/gcc; then
1901   if test x"${enable_languages+set}" != xset; then
1902     if test x"${LANGUAGES+set}" = xset; then
1903       enable_languages="${LANGUAGES}"
1904         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1905     else
1906       enable_languages=default
1907     fi
1908   else
1909     if test x"${enable_languages}" = x ||
1910        test x"${enable_languages}" = xyes;
1911        then
1912       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1913       exit 1
1914     fi
1915   fi
1916   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1917
1918   # 'f95' is the old name for the 'fortran' language. We issue a warning
1919   # and make the substitution.
1920   case ,${enable_languages}, in
1921     *,f95,*)
1922       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1923       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1924       ;;
1925   esac
1926
1927   # If bootstrapping, C++ must be enabled.
1928   case ",$enable_languages,:$enable_bootstrap" in
1929     *,c++,*:*) ;;
1930     *:yes)
1931       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1932         enable_languages="${enable_languages},c++"
1933       else
1934         AC_MSG_ERROR([bootstrapping requires c++ sources])
1935       fi
1936       ;;
1937   esac
1938
1939   # First scan to see if an enabled language requires some other language.
1940   # We assume that a given config-lang.in will list all the language
1941   # front ends it requires, even if some are required indirectly.
1942   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1943     case ${lang_frag} in
1944       ..) ;;
1945       # The odd quoting in the next line works around
1946       # an apparent bug in bash 1.12 on linux.
1947       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1948       *)
1949         # From the config-lang.in, get $language, $lang_requires, and
1950         # $lang_requires_boot_languages.
1951         language=
1952         lang_requires=
1953         lang_requires_boot_languages=
1954         # set srcdir during sourcing lang_frag to the gcc dir.
1955         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
1956         # polutes this shell
1957         saved_srcdir=${srcdir}
1958         srcdir=${srcdir}/gcc . ${lang_frag}
1959         srcdir=${saved_srcdir}
1960         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1961           case ,${enable_languages}, in
1962             *,$other,*) ;;
1963             *,default,*) ;;
1964             *,all,*) ;;
1965             *,$language,*)
1966               echo " \`$other' language required by \`$language'; enabling" 1>&2
1967               enable_languages="${enable_languages},${other}"
1968               ;;
1969           esac
1970         done
1971         for other in ${lang_requires_boot_languages} ; do
1972           if test "$other" != "c"; then
1973             case ,${enable_stage1_languages}, in
1974               *,$other,*) ;;
1975               *,default,*) ;;
1976               *,all,*) ;;
1977               *)
1978                 case ,${enable_languages}, in
1979                   *,$language,*)
1980                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1981                     enable_stage1_languages="$enable_stage1_languages,${other}"
1982                     ;;
1983                 esac
1984                 ;;
1985             esac
1986           fi
1987         done
1988         ;;
1989     esac
1990   done
1991
1992   new_enable_languages=,c,
1993
1994   # If LTO is enabled, add the LTO front end.
1995   if test "$enable_lto" = "yes" ; then
1996     case ,${enable_languages}, in
1997       *,lto,*) ;;
1998       *) enable_languages="${enable_languages},lto" ;;
1999     esac
2000     if test "${build_lto_plugin}" = "yes" ; then
2001       configdirs="$configdirs lto-plugin"
2002     fi
2003   fi
2004
2005   # If we're building an offloading compiler, add the LTO front end.
2006   if test x"$enable_as_accelerator_for" != x ; then
2007     case ,${enable_languages}, in
2008       *,lto,*) ;;
2009       *) enable_languages="${enable_languages},lto" ;;
2010     esac
2011   fi
2012
2013   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
2014   potential_languages=,c,
2015
2016   enabled_target_libs=
2017   disabled_target_libs=
2018
2019   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
2020     case ${lang_frag} in
2021       ..) ;;
2022       # The odd quoting in the next line works around
2023       # an apparent bug in bash 1.12 on linux.
2024       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
2025       *)
2026         # From the config-lang.in, get $language, $target_libs,
2027         # $lang_dirs, $boot_language, and $build_by_default
2028         language=
2029         target_libs=
2030         lang_dirs=
2031         subdir_requires=
2032         boot_language=no
2033         build_by_default=yes
2034         # set srcdir during sourcing.  See above about save & restore
2035         saved_srcdir=${srcdir}
2036         srcdir=${srcdir}/gcc . ${lang_frag}
2037         srcdir=${saved_srcdir}
2038         if test x${language} = x; then
2039           echo "${lang_frag} doesn't set \$language." 1>&2
2040           exit 1
2041         fi
2042
2043         if test "$language" = "c++"; then
2044           boot_language=yes
2045         fi
2046
2047         add_this_lang=no
2048         # C is always enabled, so no need to add it again
2049         if test "$language" != "c"; then
2050           case ,${enable_languages}, in
2051             *,${language},*)
2052               # Language was explicitly selected; include it
2053               add_this_lang=yes
2054               ;;
2055             *,all,*)
2056               # All languages are enabled
2057               add_this_lang=all
2058               ;;
2059             *,default,*)
2060               # 'default' was selected, select it if it is a default language
2061               add_this_lang=${build_by_default}
2062               ;;
2063           esac
2064         fi
2065
2066         # Disable languages that need other directories if these aren't available.
2067         for i in $subdir_requires; do
2068           test -f "$srcdir/gcc/$i/config-lang.in" && continue
2069           case ${add_this_lang} in
2070             yes)
2071               # Specifically requested language; tell them.
2072               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
2073               ;;
2074             all)
2075               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
2076               add_this_lang=unsupported
2077               ;;
2078             *)
2079               # Silently disable.
2080               add_this_lang=unsupported
2081               ;;
2082           esac
2083         done
2084
2085         # Disable Ada if no preexisting GNAT is available.
2086         case ${add_this_lang}:${language}:${have_gnat} in
2087           yes:ada:no)
2088             # Specifically requested language; tell them.
2089             AC_MSG_ERROR([GNAT is required to build $language])
2090             ;;
2091           all:ada:no)
2092             AC_MSG_WARN([GNAT is required to build $language])
2093             add_this_lang=unsupported
2094             ;;
2095           *:ada:no)
2096             # Silently disable.
2097             add_this_lang=unsupported
2098             ;;
2099         esac
2100
2101         # Disable D if no preexisting GDC is available.
2102         case ${add_this_lang}:${language}:${have_gdc} in
2103           yes:d:no)
2104             # Specifically requested language; tell them.
2105             AC_MSG_ERROR([GDC is required to build $language])
2106            ;;
2107           all:d:no)
2108             AC_MSG_WARN([GDC is required to build $language])
2109             add_this_lang=unsupported
2110             ;;
2111           *:d:no)
2112             # Silently disable.
2113             add_this_lang=unsupported
2114             ;;
2115         esac
2116
2117         # Disable jit if -enable-host-shared not specified
2118         # but not if building for Mingw. All code in Windows
2119         # is position independent code (PIC).
2120         case $target in
2121           *mingw*) ;;
2122           *)
2123           case ${add_this_lang}:${language}:${host_shared} in
2124             yes:jit:no)
2125                    # PR jit/64780: explicitly specify --enable-host-shared
2126             AC_MSG_ERROR([
2127 Enabling language "jit" requires --enable-host-shared.
2128
2129 --enable-host-shared typically slows the rest of the compiler down by
2130 a few %, so you must explicitly enable it.
2131
2132 If you want to build both the jit and the regular compiler, it is often
2133 best to do this via two separate configure/builds, in separate
2134 directories, to avoid imposing the performance cost of
2135 --enable-host-shared on the regular compiler.])
2136                     ;;
2137             all:jit:no)
2138               AC_MSG_WARN([--enable-host-shared required to build $language])
2139               add_this_lang=unsupported
2140               ;;
2141             *:jit:no)
2142               # Silently disable.
2143               add_this_lang=unsupported
2144               ;;
2145                 esac
2146           ;;
2147         esac
2148
2149         # Disable a language that is unsupported by the target.
2150         case "${add_this_lang}: $unsupported_languages " in
2151           no:*) ;;
2152           unsupported:*) ;;
2153           *:*" $language "*)
2154             AC_MSG_WARN([${language} not supported for this target])
2155             add_this_lang=unsupported
2156             ;;
2157         esac
2158
2159         case $add_this_lang in
2160           unsupported)
2161             # Remove language-dependent dirs.
2162             disabled_target_libs="$disabled_target_libs $target_libs"
2163             noconfigdirs="$noconfigdirs $lang_dirs"
2164             ;;
2165           no)
2166             # Remove language-dependent dirs; still show language as supported.
2167             disabled_target_libs="$disabled_target_libs $target_libs"
2168             noconfigdirs="$noconfigdirs $lang_dirs"
2169             potential_languages="${potential_languages}${language},"
2170             ;;
2171           all|yes)
2172             new_enable_languages="${new_enable_languages}${language},"
2173             potential_languages="${potential_languages}${language},"
2174             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2175             enabled_target_libs="$enabled_target_libs $target_libs"
2176             case "${boot_language}:,$enable_stage1_languages," in
2177               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2178                 # Add to (comma-separated) list of stage 1 languages.
2179                 case ",$stage1_languages," in
2180                   *,$language,* | ,yes, | ,all,) ;;
2181                   *) stage1_languages="${stage1_languages}${language}," ;;
2182                 esac
2183                 # We need to bootstrap any supporting libraries.
2184                 bootstrap_target_libs=`echo "${bootstrap_target_libs}${target_libs}," | sed "s/ /,/g"`
2185                 ;;
2186             esac
2187             ;;
2188         esac
2189         ;;
2190     esac
2191   done
2192
2193   # Add target libraries which are only needed for disabled languages
2194   # to noconfigdirs.
2195   if test -n "$disabled_target_libs"; then
2196     for dir in $disabled_target_libs; do
2197       case " $enabled_target_libs " in
2198       *" ${dir} "*) ;;
2199       *) noconfigdirs="$noconfigdirs $dir" ;;
2200       esac
2201     done
2202   fi
2203
2204   AC_ARG_ENABLE(stage1-languages,
2205   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2206                   [choose additional languages to build during
2207                   stage1.  Mostly useful for compiler development])],
2208   [case ,${enable_stage1_languages}, in
2209     ,no,|,,)
2210       # Set it to something that will have no effect in the loop below
2211       enable_stage1_languages=c ;;
2212     ,yes,)
2213       enable_stage1_languages=`echo $new_enable_languages | \
2214         sed -e "s/^,//" -e "s/,$//" ` ;;
2215     *,all,*)
2216       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2217         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2218   esac
2219
2220   # Add "good" languages from enable_stage1_languages to stage1_languages,
2221   # while "bad" languages go in missing_languages.  Leave no duplicates.
2222   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2223     case $potential_languages in
2224       *,$i,*)
2225         case $stage1_languages in
2226           *,$i,*) ;;
2227           *) stage1_languages="$stage1_languages$i," ;;
2228         esac ;;
2229       *)
2230         case $missing_languages in
2231           *,$i,*) ;;
2232           *) missing_languages="$missing_languages$i," ;;
2233         esac ;;
2234      esac
2235   done])
2236
2237   # Remove leading/trailing commas that were added for simplicity
2238   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2239   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2240   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2241   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2242
2243   if test "x$missing_languages" != x; then
2244     AC_MSG_ERROR([
2245 The following requested languages could not be built: ${missing_languages}
2246 Supported languages are: ${potential_languages}])
2247   fi
2248   if test "x$new_enable_languages" != "x$enable_languages"; then
2249     echo The following languages will be built: ${new_enable_languages}
2250     enable_languages="$new_enable_languages"
2251   fi
2252
2253   AC_SUBST(stage1_languages)
2254   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2255 fi
2256
2257 # Handle --disable-<component> generically.
2258 for dir in $configdirs $build_configdirs $target_configdirs ; do
2259   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2260   varname=`echo $dirname | sed -e s/+/_/g`
2261   if eval test x\${enable_${varname}} "=" xno ; then
2262     noconfigdirs="$noconfigdirs $dir"
2263   fi
2264 done
2265
2266 # Check for Boehm's garbage collector
2267 AC_ARG_ENABLE(objc-gc,
2268 [AS_HELP_STRING([--enable-objc-gc],
2269                 [enable use of Boehm's garbage collector with the
2270                  GNU Objective-C runtime])])
2271 AC_ARG_WITH([target-bdw-gc],
2272 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2273                 [specify prefix directory for installed bdw-gc package.
2274                  Equivalent to --with-target-bdw-gc-include=PATH/include
2275                  plus --with-target-bdw-gc-lib=PATH/lib])])
2276 AC_ARG_WITH([target-bdw-gc-include],
2277 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2278                 [specify directories for installed bdw-gc include files])])
2279 AC_ARG_WITH([target-bdw-gc-lib],
2280 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2281                 [specify directories for installed bdw-gc library])])
2282
2283 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2284   AC_MSG_CHECKING([for bdw garbage collector])
2285   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2286     dnl no bdw-gw options, assume default locations
2287     AC_MSG_RESULT([using bdw-gc in default locations])
2288   else
2289     dnl bdw-gw options, first error checking, complete checking in libobjc
2290     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2291       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2292     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2293       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2294     else
2295       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2296     fi
2297   fi
2298 esac
2299
2300 # Disable libitm, libsanitizer, libvtv if we're not building C++
2301 case ,${enable_languages}, in
2302   *,c++,*)
2303     # Disable libitm, libsanitizer if we're not building libstdc++
2304     case "${noconfigdirs}" in
2305       *target-libstdc++-v3*)
2306         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2307         ;;
2308       *) ;;
2309     esac
2310     ;;
2311   *)
2312     noconfigdirs="$noconfigdirs target-libitm target-libsanitizer target-libvtv"
2313     ;;
2314 esac
2315
2316 # If gcc/ is not in the source tree then we'll not be building a
2317 # target compiler, assume in that case we don't want to build any
2318 # target libraries or tools.
2319 #
2320 # This was added primarily for the benefit for binutils-gdb who reuse
2321 # this configure script, but don't always have target tools available.
2322 if test ! -d ${srcdir}/gcc; then
2323    skipdirs="${skipdirs} ${target_configdirs}"
2324 fi
2325
2326 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2327 # $build_configdirs and $target_configdirs.
2328 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2329
2330 notsupp=""
2331 for dir in . $skipdirs $noconfigdirs ; do
2332   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2333   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2334     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2335     if test -r $srcdir/$dirname/configure ; then
2336       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2337         true
2338       else
2339         notsupp="$notsupp $dir"
2340       fi
2341     fi
2342   fi
2343   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2344     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2345     if test -r $srcdir/$dirname/configure ; then
2346       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2347         true
2348       else
2349         notsupp="$notsupp $dir"
2350       fi
2351     fi
2352   fi
2353   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2354     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2355     if test -r $srcdir/$dirname/configure ; then
2356       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2357         true
2358       else
2359         notsupp="$notsupp $dir"
2360       fi
2361     fi
2362   fi
2363 done
2364
2365 # Quietly strip out all directories which aren't configurable in this tree.
2366 # This relies on all configurable subdirectories being autoconfiscated, which
2367 # is now the case.
2368 build_configdirs_all="$build_configdirs"
2369 build_configdirs=
2370 for i in ${build_configdirs_all} ; do
2371   j=`echo $i | sed -e s/build-//g`
2372   if test -f ${srcdir}/$j/configure ; then
2373     build_configdirs="${build_configdirs} $i"
2374   fi
2375 done
2376
2377 configdirs_all="$configdirs"
2378 configdirs=
2379 for i in ${configdirs_all} ; do
2380   if test -f ${srcdir}/$i/configure ; then
2381     configdirs="${configdirs} $i"
2382   fi
2383 done
2384
2385 target_configdirs_all="$target_configdirs"
2386 target_configdirs=
2387 for i in ${target_configdirs_all} ; do
2388   j=`echo $i | sed -e s/target-//g`
2389   if test -f ${srcdir}/$j/configure ; then
2390     target_configdirs="${target_configdirs} $i"
2391   fi
2392 done
2393
2394 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2395 # so we have to add it after the preceding checks.
2396 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2397 then
2398   case " $configdirs " in
2399     *" libiberty "*)
2400       # If we can build libiberty, we can also build libiberty-linker-plugin.
2401       configdirs="$configdirs libiberty-linker-plugin"
2402       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2403         --with-libiberty=../libiberty-linker-plugin";;
2404     *)
2405       AC_MSG_ERROR([libiberty missing]);;
2406   esac
2407 fi
2408
2409 # Sometimes we have special requirements for the host libiberty.
2410 extra_host_libiberty_configure_flags=
2411 case " $configdirs " in
2412   *" lto-plugin "* | *" libcc1 "* | *" gdbserver "*)
2413     # When these are to be built as shared libraries, the same applies to
2414     # libiberty.
2415     extra_host_libiberty_configure_flags=--enable-shared
2416     ;;
2417 esac
2418 AC_SUBST(extra_host_libiberty_configure_flags)
2419
2420 # Sometimes we have special requirements for the host zlib.
2421 extra_host_zlib_configure_flags=
2422 case " $configdirs " in
2423   *" bfd "*)
2424     # When bfd is to be built as a shared library, the same applies to
2425     # zlib.
2426     if test "$enable_shared" = "yes"; then
2427       extra_host_zlib_configure_flags=--enable-host-shared
2428     fi
2429     ;;
2430 esac
2431 AC_SUBST(extra_host_zlib_configure_flags)
2432
2433 # Produce a warning message for the subdirs we can't configure.
2434 # This isn't especially interesting in the Cygnus tree, but in the individual
2435 # FSF releases, it's important to let people know when their machine isn't
2436 # supported by the one or two programs in a package.
2437
2438 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2439   # If $appdirs is non-empty, at least one of those directories must still
2440   # be configured, or we error out.  (E.g., if the gas release supports a
2441   # specified target in some subdirs but not the gas subdir, we shouldn't
2442   # pretend that all is well.)
2443   if test -n "$appdirs" ; then
2444     for dir in $appdirs ; do
2445       if test -r $dir/Makefile.in ; then
2446         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2447           appdirs=""
2448           break
2449         fi
2450         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2451           appdirs=""
2452           break
2453         fi
2454       fi
2455     done
2456     if test -n "$appdirs" ; then
2457       echo "*** This configuration is not supported by this package." 1>&2
2458       exit 1
2459     fi
2460   fi
2461   # Okay, some application will build, or we don't care to check.  Still
2462   # notify of subdirs not getting built.
2463   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2464   echo "    ${notsupp}" 1>&2
2465   echo "    (Any other directories should still work fine.)" 1>&2
2466 fi
2467
2468 case "$host" in
2469   *msdosdjgpp*)
2470     enable_gdbtk=no ;;
2471 esac
2472
2473 # To find our prefix, in gcc_cv_tool_prefix.
2474 ACX_TOOL_DIRS
2475
2476 copy_dirs=
2477
2478 AC_ARG_WITH([build-sysroot],
2479   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2480                   [use sysroot as the system root during the build])],
2481   [if test x"$withval" != x ; then
2482      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2483    fi],
2484   [SYSROOT_CFLAGS_FOR_TARGET=])
2485 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2486
2487 AC_ARG_WITH([debug-prefix-map],
2488   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2489                   [map A to B, C to D ... in debug information])],
2490   [if test x"$withval" != x; then
2491      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2492      for debug_map in $withval; do
2493        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2494      done
2495    fi],
2496   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2497 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2498
2499 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2500 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2501 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2502 # We want to ensure that TARGET libraries (which we know are built with
2503 # gcc) are built with "-O2 -g", so include those options when setting
2504 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2505 if test "x$CFLAGS_FOR_TARGET" = x; then
2506   if test "x${is_cross_compiler}" = xyes; then
2507     CFLAGS_FOR_TARGET="-g -O2"
2508   else
2509     CFLAGS_FOR_TARGET=$CFLAGS
2510     case " $CFLAGS " in
2511       *" -O2 "*) ;;
2512       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2513     esac
2514     case " $CFLAGS " in
2515       *" -g "* | *" -g3 "*) ;;
2516       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2517     esac
2518   fi
2519 fi
2520 AC_SUBST(CFLAGS_FOR_TARGET)
2521
2522 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2523   if test "x${is_cross_compiler}" = xyes; then
2524     CXXFLAGS_FOR_TARGET="-g -O2"
2525   else
2526     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2527     case " $CXXFLAGS " in
2528       *" -O2 "*) ;;
2529       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2530     esac
2531     case " $CXXFLAGS " in
2532       *" -g "* | *" -g3 "*) ;;
2533       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2534     esac
2535   fi
2536 fi
2537 AC_SUBST(CXXFLAGS_FOR_TARGET)
2538
2539 AC_SUBST(LDFLAGS_FOR_TARGET)
2540
2541 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2542 # the named directory are copied to $(tooldir)/sys-include.
2543 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2544   if test x${is_cross_compiler} = xno ; then
2545     echo 1>&2 '***' --with-headers is only supported when cross compiling
2546     exit 1
2547   fi
2548   if test x"${with_headers}" != xyes ; then
2549     x=${gcc_cv_tool_prefix}
2550     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2551   fi
2552 fi
2553
2554 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2555 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2556 # are permitted.
2557 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2558   if test x${is_cross_compiler} = xno ; then
2559     echo 1>&2 '***' --with-libs is only supported when cross compiling
2560     exit 1
2561   fi
2562   if test x"${with_libs}" != xyes ; then
2563     # Copy the libraries in reverse order, so that files in the first named
2564     # library override files in subsequent libraries.
2565     x=${gcc_cv_tool_prefix}
2566     for l in ${with_libs}; do
2567       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2568     done
2569   fi
2570 fi
2571
2572 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2573 #
2574 # This is done by determining whether or not the appropriate directory
2575 # is available, and by checking whether or not specific configurations
2576 # have requested that this magic not happen.
2577 #
2578 # The command line options always override the explicit settings in
2579 # configure.ac, and the settings in configure.ac override this magic.
2580 #
2581 # If the default for a toolchain is to use GNU as and ld, and you don't
2582 # want to do that, then you should use the --without-gnu-as and
2583 # --without-gnu-ld options for the configure script.  Similarly, if
2584 # the default is to use the included zlib and you don't want to do that,
2585 # you should use the --with-system-zlib option for the configure script.
2586
2587 if test x${use_gnu_as} = x &&
2588    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2589   with_gnu_as=yes
2590   extra_host_args="$extra_host_args --with-gnu-as"
2591 fi
2592
2593 if test x${use_gnu_ld} = x &&
2594    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2595   with_gnu_ld=yes
2596   extra_host_args="$extra_host_args --with-gnu-ld"
2597 fi
2598
2599 if test x${use_included_zlib} = x &&
2600    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2601   :
2602 else
2603   with_system_zlib=yes
2604   extra_host_args="$extra_host_args --with-system-zlib"
2605 fi
2606
2607 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2608 # can detect this case.
2609
2610 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2611   with_newlib=yes
2612   extra_host_args="$extra_host_args --with-newlib"
2613 fi
2614
2615 # Handle ${copy_dirs}
2616 set fnord ${copy_dirs}
2617 shift
2618 while test $# != 0 ; do
2619   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2620     :
2621   else
2622     echo Copying $1 to $2
2623
2624     # Use the install script to create the directory and all required
2625     # parent directories.
2626     if test -d $2 ; then
2627       :
2628     else
2629       echo >config.temp
2630       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2631     fi
2632
2633     # Copy the directory, assuming we have tar.
2634     # FIXME: Should we use B in the second tar?  Not all systems support it.
2635     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2636
2637     # It is the responsibility of the user to correctly adjust all
2638     # symlinks.  If somebody can figure out how to handle them correctly
2639     # here, feel free to add the code.
2640
2641     echo $1 > $2/COPIED
2642   fi
2643   shift; shift
2644 done
2645
2646 # Determine a target-dependent exec_prefix that the installed
2647 # gcc will search in.  Keep this list sorted by triplet, with
2648 # the *-*-osname triplets last.
2649 md_exec_prefix=
2650 case "${target}" in
2651   i[[34567]]86-pc-msdosdjgpp*)
2652     md_exec_prefix=/dev/env/DJDIR/bin
2653     ;;
2654   *-*-hpux* | \
2655   *-*-nto-qnx* | \
2656   *-*-solaris2*)
2657     md_exec_prefix=/usr/ccs/bin
2658     ;;
2659 esac
2660
2661 extra_arflags_for_target=
2662 extra_nmflags_for_target=
2663 extra_ranlibflags_for_target=
2664 target_makefile_frag=/dev/null
2665 case "${target}" in
2666   spu-*-*)
2667     target_makefile_frag="config/mt-spu"
2668     ;;
2669   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2670     target_makefile_frag="config/mt-sde"
2671     ;;
2672   mipsisa*-*-elfoabi*)
2673     target_makefile_frag="config/mt-mips-elfoabi"
2674     ;;
2675   mips*-*-*linux* | mips*-*-gnu*)
2676     target_makefile_frag="config/mt-mips-gnu"
2677     ;;
2678   nios2-*-elf*)
2679     target_makefile_frag="config/mt-nios2-elf"
2680     ;;
2681   *-*-linux-android*)
2682     target_makefile_frag="config/mt-android"
2683     ;;
2684   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2685     target_makefile_frag="config/mt-gnu"
2686     ;;
2687   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2688     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2689     # commands to handle both 32-bit and 64-bit objects.  These flags are
2690     # harmless if we're using GNU nm or ar.
2691     extra_arflags_for_target=" -X32_64"
2692     extra_nmflags_for_target=" -B -X32_64"
2693     ;;
2694 esac
2695
2696 alphaieee_frag=/dev/null
2697 case $target in
2698   alpha*-*-*)
2699     # This just makes sure to use the -mieee option to build target libs.
2700     # This should probably be set individually by each library.
2701     alphaieee_frag="config/mt-alphaieee"
2702     ;;
2703 esac
2704
2705 # If --enable-target-optspace always use -Os instead of -O2 to build
2706 # the target libraries, similarly if it is not specified, use -Os
2707 # on selected platforms.
2708 ospace_frag=/dev/null
2709 case "${enable_target_optspace}:${target}" in
2710   yes:*)
2711     ospace_frag="config/mt-ospace"
2712     ;;
2713   :d30v-*)
2714     ospace_frag="config/mt-d30v"
2715     ;;
2716   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2717     ospace_frag="config/mt-ospace"
2718     ;;
2719   no:* | :*)
2720     ;;
2721   *)
2722     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2723     ;;
2724 esac
2725
2726 # Some systems (e.g., one of the i386-aix systems the gas testers are
2727 # using) don't handle "\$" correctly, so don't use it here.
2728 tooldir='${exec_prefix}'/${target_noncanonical}
2729 build_tooldir=${tooldir}
2730
2731 # Create a .gdbinit file which runs the one in srcdir
2732 # and tells GDB to look there for source files.
2733
2734 if test -r ${srcdir}/.gdbinit ; then
2735   case ${srcdir} in
2736     .) ;;
2737     *) cat > ./.gdbinit <<EOF
2738 # ${NO_EDIT}
2739 dir ${srcdir}
2740 dir .
2741 source ${srcdir}/.gdbinit
2742 EOF
2743     ;;
2744   esac
2745 fi
2746
2747 # Make sure that the compiler is able to generate an executable.  If it
2748 # can't, we are probably in trouble.  We don't care whether we can run the
2749 # executable--we might be using a cross compiler--we only care whether it
2750 # can be created.  At this point the main configure script has set CC.
2751 we_are_ok=no
2752 echo "int main () { return 0; }" > conftest.c
2753 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2754 if test $? = 0 ; then
2755   if test -s conftest || test -s conftest.exe ; then
2756     we_are_ok=yes
2757   fi
2758 fi
2759 case $we_are_ok in
2760   no)
2761     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2762     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2763     rm -f conftest*
2764     exit 1
2765     ;;
2766 esac
2767 rm -f conftest*
2768
2769 # Decide which environment variable is used to find dynamic libraries.
2770 case "${host}" in
2771   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2772   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2773   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2774   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2775 esac
2776
2777 # On systems where the dynamic library environment variable is PATH,
2778 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2779 # built executables to PATH.
2780 if test "$RPATH_ENVVAR" = PATH; then
2781   GCC_SHLIB_SUBDIR=/shlib
2782 else
2783   GCC_SHLIB_SUBDIR=
2784 fi
2785
2786 # Adjust the toplevel makefile according to whether bootstrap was selected.
2787 case $enable_bootstrap in
2788   yes)
2789     bootstrap_suffix=bootstrap
2790     BUILD_CONFIG=bootstrap-debug
2791     ;;
2792   no)
2793     bootstrap_suffix=no-bootstrap
2794     BUILD_CONFIG=
2795     ;;
2796 esac
2797
2798 AC_MSG_CHECKING(for default BUILD_CONFIG)
2799
2800 AC_ARG_WITH([build-config],
2801   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2802                   [use config/NAME.mk build configuration])],
2803   [case $with_build_config in
2804    yes) with_build_config= ;;
2805    no) with_build_config= BUILD_CONFIG= ;;
2806    esac])
2807
2808 if test "x${with_build_config}" != x; then
2809   BUILD_CONFIG=$with_build_config
2810 else
2811   case $BUILD_CONFIG in
2812   bootstrap-debug)
2813     if echo "int f (void) { return 0; }" > conftest.c &&
2814        ${CC} -c conftest.c &&
2815        mv conftest.o conftest.o.g0 &&
2816        ${CC} -c -g conftest.c &&
2817        mv conftest.o conftest.o.g &&
2818        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2819       :
2820     else
2821       BUILD_CONFIG=
2822     fi
2823     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2824     ;;
2825   esac
2826 fi
2827 AC_MSG_RESULT($BUILD_CONFIG)
2828 AC_SUBST(BUILD_CONFIG)
2829
2830 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2831 AC_MSG_CHECKING([for --enable-vtable-verify])
2832 AC_ARG_ENABLE(vtable-verify,
2833 [AS_HELP_STRING([--enable-vtable-verify],
2834                 [Enable vtable verification feature])],
2835 [case "$enableval" in
2836  yes) enable_vtable_verify=yes ;;
2837  no)  enable_vtable_verify=no ;;
2838  *)   enable_vtable_verify=no;;
2839  esac],
2840 [enable_vtable_verify=no])
2841 AC_MSG_RESULT($enable_vtable_verify)
2842
2843 # Record target_configdirs and the configure arguments for target and
2844 # build configuration in Makefile.
2845 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2846 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2847 bootstrap_fixincludes=no
2848
2849 # If we are building libgomp, bootstrap it.
2850 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2851   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2852 fi
2853
2854 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2855 # or bootstrap-ubsan, bootstrap it.
2856 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2857   case "$BUILD_CONFIG" in
2858     *bootstrap-hwasan* | *bootstrap-asan* | *bootstrap-ubsan* )
2859       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2860       bootstrap_fixincludes=yes
2861       ;;
2862   esac
2863 fi
2864
2865 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2866 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2867    test "$enable_vtable_verify" != no; then
2868   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2869 fi
2870
2871 # If we are building libatomic and the list of enabled languages includes the
2872 # D frontend, bootstrap it.
2873 if echo " ${target_configdirs} " | grep " libatomic " > /dev/null 2>&1; then
2874   case ,${enable_languages}, in
2875     *,d,*)
2876       bootstrap_target_libs=${bootstrap_target_libs}target-libatomic,
2877       ;;
2878   esac
2879 fi
2880
2881 # Determine whether gdb needs tk/tcl or not.
2882 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2883 # and in that case we want gdb to be built without tk.  Ugh!
2884 # In fact I believe gdb is the *only* package directly dependent on tk,
2885 # so we should be able to put the 'maybe's in unconditionally and
2886 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2887 # 100% sure that that's safe though.
2888
2889 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2890 case "$enable_gdbtk" in
2891   no)
2892     GDB_TK="" ;;
2893   yes)
2894     GDB_TK="${gdb_tk}" ;;
2895   *)
2896     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2897     # distro.  Eventually someone will fix this and move Insight, nee
2898     # gdbtk to a separate directory.
2899     if test -d ${srcdir}/gdb/gdbtk ; then
2900       GDB_TK="${gdb_tk}"
2901     else
2902       GDB_TK=""
2903     fi
2904     ;;
2905 esac
2906 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2907 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2908
2909 # gdb and gdbserver depend on gnulib and gdbsupport, but as nothing
2910 # else does, only include them if one of these is built.  The Makefile
2911 # provides the ordering, so it's enough here to add to the list.
2912 case " ${configdirs} " in
2913   *\ gdb\ *)
2914     configdirs="${configdirs} gnulib gdbsupport"
2915     ;;
2916   *\ gdbserver\ *)
2917     configdirs="${configdirs} gnulib gdbsupport"
2918     ;;
2919   *\ sim\ *)
2920     configdirs="${configdirs} gnulib"
2921     ;;
2922 esac
2923
2924 # Strip out unwanted targets.
2925
2926 # While at that, we remove Makefiles if we were started for recursive
2927 # configuration, so that the top-level Makefile reconfigures them,
2928 # like we used to do when configure itself was recursive.
2929
2930 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2931 # but now we're fixing up the Makefile ourselves with the additional
2932 # commands passed to AC_CONFIG_FILES.  Use separate variables
2933 # extrasub-{build,host,target} not because there is any reason to split
2934 # the substitutions up that way, but only to remain below the limit of
2935 # 99 commands in a script, for HP-UX sed.
2936
2937 # Do not nest @if/@endif or @unless/@endunless pairs, because
2938 # configure will not warn you at all.
2939
2940 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2941   yes:yes:*\ gold\ *:*,c++,*) ;;
2942   yes:yes:*\ gold\ *:*)
2943     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2944     ;;
2945 esac
2946
2947 extrasub_build=
2948 for module in ${build_configdirs} ; do
2949   if test -z "${no_recursion}" \
2950      && test -f ${build_subdir}/${module}/Makefile; then
2951     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2952     rm -f ${build_subdir}/${module}/Makefile
2953   fi
2954   extrasub_build="$extrasub_build
2955 /^@if build-$module\$/d
2956 /^@endif build-$module\$/d
2957 /^@unless build-$module\$/,/^@endunless build-$module\$/d
2958 /^@if build-$module-$bootstrap_suffix\$/d
2959 /^@endif build-$module-$bootstrap_suffix\$/d
2960 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
2961 done
2962 extrasub_host=
2963 for module in ${configdirs} ; do
2964   if test -z "${no_recursion}"; then
2965     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2966       if test -f ${file}; then
2967         echo 1>&2 "*** removing ${file} to force reconfigure"
2968         rm -f ${file}
2969       fi
2970     done
2971   fi
2972   case ${module},${bootstrap_fixincludes} in
2973     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2974     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2975   esac
2976   extrasub_host="$extrasub_host
2977 /^@if $module\$/d
2978 /^@endif $module\$/d
2979 /^@unless $module\$/,/^@endunless $module\$/d
2980 /^@if $module-$host_bootstrap_suffix\$/d
2981 /^@endif $module-$host_bootstrap_suffix\$/d
2982 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
2983 done
2984 extrasub_target=
2985 for module in ${target_configdirs} ; do
2986   if test -z "${no_recursion}" \
2987      && test -f ${target_subdir}/${module}/Makefile; then
2988     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2989     rm -f ${target_subdir}/${module}/Makefile
2990   fi
2991
2992   # We only bootstrap target libraries listed in bootstrap_target_libs.
2993   case $bootstrap_target_libs in
2994     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2995     *) target_bootstrap_suffix=no-bootstrap ;;
2996   esac
2997
2998   extrasub_target="$extrasub_target
2999 /^@if target-$module\$/d
3000 /^@endif target-$module\$/d
3001 /^@unless target-$module\$/,/^@endunless target-$module\$/d
3002 /^@if target-$module-$target_bootstrap_suffix\$/d
3003 /^@endif target-$module-$target_bootstrap_suffix\$/d
3004 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
3005 done
3006
3007 # Do the final fixup along with target modules.
3008 extrasub_target="$extrasub_target
3009 /^@if /,/^@endif /d
3010 /^@unless /d
3011 /^@endunless /d"
3012
3013 if test "$enable_pgo_build" != "no"; then
3014   extrasub_build="$extrasub_build
3015 /^@if pgo-build\$/d
3016 /^@endif pgo-build\$/d"
3017 fi
3018
3019 # Create the serialization dependencies.  This uses a temporary file.
3020
3021 AC_ARG_ENABLE([serial-configure],
3022 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
3023                 [force sequential configuration of
3024                  sub-packages for the host, target or build
3025                  machine, or all sub-packages])])
3026
3027 case ${enable_serial_configure} in
3028   yes)
3029     enable_serial_build_configure=yes
3030     enable_serial_host_configure=yes
3031     enable_serial_target_configure=yes
3032     ;;
3033 esac
3034
3035 # These force 'configure's to be done one at a time, to avoid problems
3036 # with contention over a shared config.cache.
3037 rm -f serdep.tmp
3038 echo '# serdep.tmp' > serdep.tmp
3039 olditem=
3040 test "x${enable_serial_build_configure}" = xyes &&
3041 for item in ${build_configdirs} ; do
3042   case ${olditem} in
3043     "") ;;
3044     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
3045   esac
3046   olditem=${item}
3047 done
3048 olditem=
3049 test "x${enable_serial_host_configure}" = xyes &&
3050 for item in ${configdirs} ; do
3051   case ${olditem} in
3052     "") ;;
3053     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
3054   esac
3055   olditem=${item}
3056 done
3057 olditem=
3058 test "x${enable_serial_target_configure}" = xyes &&
3059 for item in ${target_configdirs} ; do
3060   case ${olditem} in
3061     "") ;;
3062     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
3063   esac
3064   olditem=${item}
3065 done
3066 serialization_dependencies=serdep.tmp
3067 AC_SUBST_FILE(serialization_dependencies)
3068
3069 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
3070 # target, nonopt, and variable assignments.  These are the ones we
3071 # might not want to pass down to subconfigures.  The exception being
3072 # --cache-file=/dev/null, which is used to turn off the use of cache
3073 # files altogether, and which should be passed on to subconfigures.
3074 # Also strip program-prefix, program-suffix, and program-transform-name,
3075 # so that we can pass down a consistent program-transform-name.
3076 baseargs=
3077 tbaseargs=
3078 keep_next=no
3079 skip_next=no
3080 eval "set -- $ac_configure_args"
3081 for ac_arg
3082 do
3083   if test X"$skip_next" = X"yes"; then
3084     skip_next=no
3085     continue
3086   fi
3087   if test X"$keep_next" = X"yes"; then
3088     case $ac_arg in
3089       *\'*)
3090         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3091     esac
3092     baseargs="$baseargs '$ac_arg'"
3093     tbaseargs="$tbaseargs '$ac_arg'"
3094     keep_next=no
3095     continue
3096   fi
3097
3098   # Handle separated arguments.  Based on the logic generated by
3099   # autoconf 2.59.
3100   case $ac_arg in
3101     *=* | --config-cache | -C | -disable-* | --disable-* \
3102       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
3103       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
3104       | -with-* | --with-* | -without-* | --without-* | --x)
3105       separate_arg=no
3106       ;;
3107     -*)
3108       separate_arg=yes
3109       ;;
3110     *)
3111       separate_arg=no
3112       ;;
3113   esac
3114
3115   skip_targ=no
3116   case $ac_arg in
3117 changequote(,)
3118   --with-* | --without-*)
3119     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
3120
3121     case $libopt in
3122     *[-_]include)
3123       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
3124       ;;
3125     *[-_]lib)
3126       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
3127       ;;
3128     *)
3129       lib=$libopt
3130       ;;
3131     esac
3132 changequote([,])
3133
3134     case $lib in
3135     mpc | mpfr | gmp | isl)
3136       # If we're processing --with-$lib, --with-$lib-include or
3137       # --with-$lib-lib, for one of the libs above, and target is
3138       # different from host, don't pass the current argument to any
3139       # target library's configure.
3140       if test x$is_cross_compiler = xyes; then
3141         skip_targ=yes
3142       fi
3143       ;;
3144     esac
3145     ;;
3146   esac
3147
3148   case "$ac_arg" in
3149     --cache-file=/dev/null | \
3150     -cache-file=/dev/null )
3151       # Handled here to avoid the test to skip args below.
3152       baseargs="$baseargs '$ac_arg'"
3153       tbaseargs="$tbaseargs '$ac_arg'"
3154       # Assert: $separate_arg should always be no.
3155       keep_next=$separate_arg
3156       ;;
3157     --no*)
3158       continue
3159       ;;
3160     --c* | \
3161     --sr* | \
3162     --ho* | \
3163     --bu* | \
3164     --t* | \
3165     --program-* | \
3166     -cache_file* | \
3167     -srcdir* | \
3168     -host* | \
3169     -build* | \
3170     -target* | \
3171     -program-prefix* | \
3172     -program-suffix* | \
3173     -program-transform-name* )
3174       skip_next=$separate_arg
3175       continue
3176       ;;
3177     -*)
3178       # An option.  Add it.
3179       case $ac_arg in
3180         *\'*)
3181           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3182       esac
3183       baseargs="$baseargs '$ac_arg'"
3184       if test X"$skip_targ" = Xno; then
3185         tbaseargs="$tbaseargs '$ac_arg'"
3186       fi
3187       keep_next=$separate_arg
3188       ;;
3189     *)
3190       # Either a variable assignment, or a nonopt (triplet).  Don't
3191       # pass it down; let the Makefile handle this.
3192       continue
3193       ;;
3194   esac
3195 done
3196 # Remove the initial space we just introduced and, as these will be
3197 # expanded by make, quote '$'.
3198 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3199
3200 # Add in --program-transform-name, after --program-prefix and
3201 # --program-suffix have been applied to it.  Autoconf has already
3202 # doubled dollar signs and backslashes in program_transform_name; we want
3203 # the backslashes un-doubled, and then the entire thing wrapped in single
3204 # quotes, because this will be expanded first by make and then by the shell.
3205 # Also, because we want to override the logic in subdir configure scripts to
3206 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3207 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3208 ${program_transform_name}
3209 EOF_SED
3210 gcc_transform_name=`cat conftestsed.out`
3211 rm -f conftestsed.out
3212 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3213 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3214 if test "$silent" = yes; then
3215   baseargs="$baseargs --silent"
3216   tbaseargs="$tbaseargs --silent"
3217 fi
3218 baseargs="$baseargs --disable-option-checking"
3219 tbaseargs="$tbaseargs --disable-option-checking"
3220
3221 # Record and document user additions to sub configure arguments.
3222 AC_ARG_VAR([build_configargs],
3223            [additional configure arguments for build directories])
3224 AC_ARG_VAR([host_configargs],
3225            [additional configure arguments for host directories])
3226 AC_ARG_VAR([target_configargs],
3227            [additional configure arguments for target directories])
3228
3229 # For the build-side libraries, we just need to pretend we're native,
3230 # and not use the same cache file.  Multilibs are neither needed nor
3231 # desired.  We can't even use the same cache file for all build-side
3232 # libraries, as they're compiled differently; some with C, some with
3233 # C++ or with different feature-enabling options.
3234 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3235
3236 # For host modules, accept cache file option, or specification as blank.
3237 case "${cache_file}" in
3238 "") # empty
3239   cache_file_option="" ;;
3240 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3241   cache_file_option="--cache-file=${cache_file}" ;;
3242 *) # relative path
3243   cache_file_option="--cache-file=../${cache_file}" ;;
3244 esac
3245
3246 # Host dirs don't like to share a cache file either, horribly enough.
3247 # This seems to be due to autoconf 2.5x stupidity.
3248 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3249
3250 target_configargs="$target_configargs ${tbaseargs}"
3251
3252 # Passing a --with-cross-host argument lets the target libraries know
3253 # whether they are being built with a cross-compiler or being built
3254 # native.  However, it would be better to use other mechanisms to make the
3255 # sorts of decisions they want to make on this basis.  Please consider
3256 # this option to be deprecated.  FIXME.
3257 if test x${is_cross_compiler} = xyes ; then
3258   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3259 fi
3260
3261 # Special user-friendly check for native x86_64-linux build, if
3262 # multilib is not explicitly enabled.
3263 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3264   x86_64-*linux*:yes:$build:$build:)
3265     # Make sure we have a development environment that handles 32-bit
3266     dev64=no
3267     echo "int main () { return 0; }" > conftest.c
3268     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3269     if test $? = 0 ; then
3270       if test -s conftest || test -s conftest.exe ; then
3271         dev64=yes
3272       fi
3273     fi
3274     rm -f conftest*
3275     if test x${dev64} != xyes ; then
3276       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.])
3277     fi
3278     ;;
3279 esac
3280
3281 # Default to --enable-multilib.
3282 if test x${enable_multilib} = x ; then
3283   target_configargs="--enable-multilib ${target_configargs}"
3284 fi
3285
3286 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3287 # changed from the earlier setting of with_newlib.
3288 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3289   target_configargs="--with-newlib ${target_configargs}"
3290 fi
3291
3292 # Different target subdirs use different values of certain variables
3293 # (notably CXX).  Worse, multilibs use *lots* of different values.
3294 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3295 # it doesn't automatically accept command-line overrides of them.
3296 # This means it's not safe for target subdirs to share a cache file,
3297 # which is disgusting, but there you have it.  Hopefully this can be
3298 # fixed in future.  It's still worthwhile to use a cache file for each
3299 # directory.  I think.
3300
3301 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3302 # We need to pass --target, as newer autoconf's requires consistency
3303 # for target_alias and gcc doesn't manage it consistently.
3304 target_configargs="--cache-file=./config.cache ${target_configargs}"
3305
3306 FLAGS_FOR_TARGET=
3307 case " $target_configdirs " in
3308  *" newlib "*)
3309   case " $target_configargs " in
3310   *" --with-newlib "*)
3311    case "$target" in
3312     *-cygwin*)
3313       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3314       ;;
3315    esac
3316
3317    # If we're not building GCC, don't discard standard headers.
3318    if test -d ${srcdir}/gcc; then
3319      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3320
3321      if test "${build}" != "${host}"; then
3322        # On Canadian crosses, CC_FOR_TARGET will have already been set
3323        # by `configure', so we won't have an opportunity to add -Bgcc/
3324        # to it.  This is right: we don't want to search that directory
3325        # for binaries, but we want the header files in there, so add
3326        # them explicitly.
3327        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3328
3329        # Someone might think of using the pre-installed headers on
3330        # Canadian crosses, in case the installed compiler is not fully
3331        # compatible with the compiler being built.  In this case, it
3332        # would be better to flag an error than risking having
3333        # incompatible object files being constructed.  We can't
3334        # guarantee that an error will be flagged, but let's hope the
3335        # compiler will do it, when presented with incompatible header
3336        # files.
3337      fi
3338    fi
3339
3340    case "${target}-${is_cross_compiler}" in
3341    i[[3456789]]86-*-linux*-no)
3342       # Here host == target, so we don't need to build gcc,
3343       # so we don't want to discard standard headers.
3344       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3345       ;;
3346    *)
3347       # If we're building newlib, use its generic headers last, but search
3348       # for any libc-related directories first (so make it the last -B
3349       # switch).
3350       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3351
3352       # If we're building libgloss, find the startup file, simulator library
3353       # and linker script.
3354       case " $target_configdirs " in
3355         *" libgloss "*)
3356         # Look for startup file, simulator library and maybe linker script.
3357         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3358         # Look for libnosys.a in case the target needs it.
3359         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3360         # Most targets have the linker script in the source directory.
3361         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3362         ;;
3363       esac
3364       ;;
3365    esac
3366    ;;
3367   esac
3368   ;;
3369 esac
3370
3371 case "$target" in
3372   x86_64-*mingw* | *-w64-mingw*)
3373   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3374   # however, use a symlink named 'mingw' in ${prefix} .
3375     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3376     ;;
3377   *-mingw*)
3378   # MinGW can't be handled as Cygwin above since it does not use newlib.
3379     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3380     ;;
3381 esac
3382
3383 # Allow the user to override the flags for
3384 # our build compiler if desired.
3385 if test x"${build}" = x"${host}" ; then
3386   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3387   CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
3388   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3389   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3390 fi
3391
3392 # On Canadian crosses, we'll be searching the right directories for
3393 # the previously-installed cross compiler, so don't bother to add
3394 # flags for directories within the install tree of the compiler
3395 # being built; programs in there won't even run.
3396 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3397   # Search for pre-installed headers if nothing else fits.
3398   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3399 fi
3400
3401 if test "x${use_gnu_ld}" = x &&
3402    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3403   # Arrange for us to find uninstalled linker scripts.
3404   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3405 fi
3406
3407 # Search for other target-specific linker scripts and such.
3408 case "${target}" in
3409   mep*)
3410     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3411     ;;
3412   # The VxWorks support for shared libraries is getting in
3413   # incrementally.  Make sure it doesn't get activated implicitly:
3414   *vxworks*)
3415     if test "${enable_shared-unset}" = unset ; then
3416       enable_shared=no
3417       # So the build of libraries knows ...
3418       target_configargs="${target_configargs} --disable-shared"
3419       # So gcc knows ...
3420       host_configargs="${host_configargs} --disable-shared"
3421     fi
3422     ;;
3423 esac
3424
3425 # Makefile fragments.
3426 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3427 do
3428   eval fragval=\$$frag
3429   if test $fragval != /dev/null; then
3430     eval $frag=${srcdir}/$fragval
3431   fi
3432 done
3433 AC_SUBST_FILE(host_makefile_frag)
3434 AC_SUBST_FILE(target_makefile_frag)
3435 AC_SUBST_FILE(alphaieee_frag)
3436 AC_SUBST_FILE(ospace_frag)
3437
3438 # Miscellanea: directories, flags, etc.
3439 AC_SUBST(RPATH_ENVVAR)
3440 AC_SUBST(GCC_SHLIB_SUBDIR)
3441 AC_SUBST(tooldir)
3442 AC_SUBST(build_tooldir)
3443 AC_SUBST(CONFIGURE_GDB_TK)
3444 AC_SUBST(GDB_TK)
3445 AC_SUBST(INSTALL_GDB_TK)
3446
3447 # Build module lists & subconfigure args.
3448 AC_SUBST(build_configargs)
3449 AC_SUBST(build_configdirs)
3450
3451 # Host module lists & subconfigure args.
3452 AC_SUBST(host_configargs)
3453 AC_SUBST(configdirs)
3454 AC_SUBST(target_configdirs)
3455
3456 # Target module lists & subconfigure args.
3457 AC_SUBST(target_configargs)
3458
3459
3460 # Build tools.
3461 AC_SUBST(AR_FOR_BUILD)
3462 AC_SUBST(AS_FOR_BUILD)
3463 AC_SUBST(CC_FOR_BUILD)
3464 AC_SUBST(CFLAGS_FOR_BUILD)
3465 AC_SUBST(CPP_FOR_BUILD)
3466 AC_SUBST(CPPFLAGS_FOR_BUILD)
3467 AC_SUBST(CXXFLAGS_FOR_BUILD)
3468 AC_SUBST(CXX_FOR_BUILD)
3469 AC_SUBST(DLLTOOL_FOR_BUILD)
3470 AC_SUBST(DSYMUTIL_FOR_BUILD)
3471 AC_SUBST(GFORTRAN_FOR_BUILD)
3472 AC_SUBST(GOC_FOR_BUILD)
3473 AC_SUBST(GDC_FOR_BUILD)
3474 AC_SUBST(LDFLAGS_FOR_BUILD)
3475 AC_SUBST(LD_FOR_BUILD)
3476 AC_SUBST(NM_FOR_BUILD)
3477 AC_SUBST(RANLIB_FOR_BUILD)
3478 AC_SUBST(WINDMC_FOR_BUILD)
3479 AC_SUBST(WINDRES_FOR_BUILD)
3480
3481 # Generate default definitions for YACC, M4, LEX and other programs that run
3482 # on the build machine.  These are used if the Makefile can't locate these
3483 # programs in objdir.
3484 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3485
3486 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3487 case " $build_configdirs " in
3488   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3489 esac
3490
3491 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3492 case " $build_configdirs " in
3493   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3494 esac
3495
3496 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3497 case " $build_configdirs " in
3498   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3499 esac
3500
3501 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3502 case " $build_configdirs " in
3503   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3504   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3505 esac
3506
3507 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3508 case " $build_configdirs " in
3509   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3510 esac
3511
3512 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3513 case " $build_configdirs " in
3514   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3515   *)
3516 changequote(,)
3517     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3518     # higher, else we use the "missing" dummy.
3519     if ${MAKEINFO} --version \
3520        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3521       :
3522     else
3523       MAKEINFO="$MISSING makeinfo"
3524     fi
3525     ;;
3526 changequote([,])
3527 esac
3528
3529 # FIXME: expect and dejagnu may become build tools?
3530
3531 AC_CHECK_PROGS(EXPECT, expect, expect)
3532 case " $configdirs " in
3533   *" expect "*)
3534     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3535     ;;
3536 esac
3537
3538 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3539 case " $configdirs " in
3540   *" dejagnu "*)
3541     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3542     ;;
3543 esac
3544
3545
3546 # Host tools.
3547 NCN_STRICT_CHECK_TOOLS(AR, ar)
3548 NCN_STRICT_CHECK_TOOLS(AS, as)
3549 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3550 NCN_STRICT_CHECK_TOOLS(DSYMUTIL, dsymutil)
3551 NCN_STRICT_CHECK_TOOLS(LD, ld)
3552 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3553 NCN_STRICT_CHECK_TOOLS(NM, nm)
3554 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3555 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3556 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3557 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3558 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3559 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3560 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3561 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3562 AC_SUBST(CC)
3563 AC_SUBST(CXX)
3564 AC_SUBST(CFLAGS)
3565 AC_SUBST(CXXFLAGS)
3566 AC_SUBST(GDC)
3567 AC_SUBST(GDCFLAGS)
3568
3569 # Target tools.
3570 AC_ARG_WITH([build-time-tools],
3571   [AS_HELP_STRING([--with-build-time-tools=PATH],
3572                   [use given path to find target tools during the build])],
3573   [case x"$withval" in
3574      x/*) ;;
3575      *)
3576        with_build_time_tools=
3577        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3578        ;;
3579    esac],
3580   [with_build_time_tools=])
3581
3582 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3583 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3584 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3585 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3586 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3587 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3588
3589 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3590 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3591 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3592 ACX_CHECK_INSTALLED_TARGET_TOOL(DSYMUTIL_FOR_TARGET, dsymutil)
3593 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3594 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3595 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3596 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3597 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3598 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3599 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3600 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3601 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3602 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3603 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3604
3605 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3606
3607 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3608 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3609 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3610 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3611 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3612                 [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],
3613                 c++)
3614 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3615                 [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],
3616                 c++)
3617 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3618 GCC_TARGET_TOOL(dsymutil, DSYMUTIL_FOR_TARGET, DSYMUTIL)
3619 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3620 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3621                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3622 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3623                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3624 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3625                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3626 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3627 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3628 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3629 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3630 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3631 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3632 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3633 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3634 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3635 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3636 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3637
3638 AC_SUBST(FLAGS_FOR_TARGET)
3639 AC_SUBST(RAW_CXX_FOR_TARGET)
3640
3641 # Certain tools may need extra flags.
3642 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3643 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3644 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3645
3646 # When building target libraries, except in a Canadian cross, we use
3647 # the same toolchain as the compiler we just built.
3648 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3649 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3650 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3651 if test $host = $build; then
3652   case " $configdirs " in
3653     *" gcc "*)
3654       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3655       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3656       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3657       ;;
3658   esac
3659 fi
3660
3661 AC_SUBST(COMPILER_AS_FOR_TARGET)
3662 AC_SUBST(COMPILER_LD_FOR_TARGET)
3663 AC_SUBST(COMPILER_NM_FOR_TARGET)
3664
3665 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3666 AC_ARG_ENABLE(maintainer-mode,
3667 [AS_HELP_STRING([--enable-maintainer-mode],
3668                 [enable make rules and dependencies not useful
3669                  (and sometimes confusing) to the casual installer])],
3670       USE_MAINTAINER_MODE=$enableval,
3671       USE_MAINTAINER_MODE=no)
3672 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3673 AC_SUBST(MAINTAINER_MODE_TRUE)
3674 AC_SUBST(MAINTAINER_MODE_FALSE)
3675 if test "$USE_MAINTAINER_MODE" = yes; then
3676   MAINTAINER_MODE_TRUE=
3677   MAINTAINER_MODE_FALSE='#'
3678 else
3679   MAINTAINER_MODE_TRUE='#'
3680   MAINTAINER_MODE_FALSE=
3681 fi
3682 MAINT=$MAINTAINER_MODE_TRUE
3683 AC_SUBST(MAINT)dnl
3684
3685 # ---------------------
3686 # GCC bootstrap support
3687 # ---------------------
3688
3689 # Stage specific cflags for build.
3690 stage1_cflags="-g"
3691 case $build in
3692   vax-*-*)
3693     case ${GCC} in
3694       yes) stage1_cflags="-g -Wa,-J" ;;
3695       *) stage1_cflags="-g -J" ;;
3696     esac ;;
3697 esac
3698
3699 AC_SUBST(stage1_cflags)
3700
3701 # Enable --enable-checking in stage1 of the compiler.
3702 AC_ARG_ENABLE(stage1-checking,
3703 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3704                 [choose additional checking for stage1 of the compiler])],
3705 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3706 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3707   # For --disable-checking or implicit --enable-checking=release, avoid
3708   # setting --enable-checking=gc in the default stage1 checking for LTO
3709   # bootstraps.  See PR62077.
3710   case $BUILD_CONFIG in
3711     *lto*)
3712       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3713     *)
3714       stage1_checking=--enable-checking=yes,types;;
3715   esac
3716   if test "x$enable_checking" = x && \
3717      test -d ${srcdir}/gcc && \
3718      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3719     stage1_checking=--enable-checking=yes,types,extra
3720   fi
3721 else
3722   stage1_checking=--enable-checking=$enable_checking,types
3723 fi])
3724 AC_SUBST(stage1_checking)
3725
3726 # Enable -Werror in bootstrap stage2 and later.
3727 AC_ARG_ENABLE(werror,
3728 [AS_HELP_STRING([--enable-werror],
3729                 [enable -Werror in bootstrap stage2 and later])],
3730 [
3731 case ${enable_werror} in
3732   yes) stage2_werror_flag="--enable-werror-always" ;;
3733   *) stage2_werror_flag="" ;;
3734 esac
3735 ],
3736 [
3737 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3738   case $BUILD_CONFIG in
3739   bootstrap-debug)
3740       stage2_werror_flag="--enable-werror-always" ;;
3741   "")
3742       stage2_werror_flag="--enable-werror-always" ;;
3743   esac
3744 fi
3745 ])
3746
3747 AC_SUBST(stage2_werror_flag)
3748
3749 # Specify what files to not compare during bootstrap.
3750
3751 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3752 case "$target" in
3753   hppa*64*-*-hpux*) ;;
3754   powerpc*-ibm-aix*) compare_exclusions="$compare_exclusions | *libgomp*\$(objext)" ;;
3755 esac
3756 AC_SUBST(compare_exclusions)
3757
3758 AC_CONFIG_FILES([Makefile],
3759   [sed "$extrasub_build" Makefile |
3760    sed "$extrasub_host" |
3761    sed "$extrasub_target" > mf$$
3762    mv -f mf$$ Makefile],
3763   [extrasub_build="$extrasub_build"
3764    extrasub_host="$extrasub_host"
3765    extrasub_target="$extrasub_target"])
3766 AC_OUTPUT