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 #   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([libtool.m4])
  27 m4_include([ltoptions.m4])
  28 m4_include([ltsugar.m4])
  29 m4_include([ltversion.m4])
  30 m4_include([lt~obsolete.m4])
  31 m4_include([config/isl.m4])
  32 m4_include([config/cloog.m4])
  33
  34 AC_INIT(move-if-change)
  35 AC_PREREQ(2.64)
  36 AC_DISABLE_OPTION_CHECKING
  37
  38 progname=$0
  39 # if PWD already has a value, it is probably wrong.
  40 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  41
  42 # Export original configure arguments for use by sub-configures.
  43 # Quote arguments with shell meta charatcers.
  44 TOPLEVEL_CONFIGURE_ARGUMENTS=
  45 set -- "$progname" "$@"
  46 for ac_arg
  47 do
  48   case "$ac_arg" in
  49   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  50     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  51     # if the argument is of the form -foo=baz, quote the baz part only
  52     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  53   *) ;;
  54   esac
  55   # Add the quoted argument to the list.
  56   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  57 done
  58 if test "$silent" = yes; then
  59   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  60 fi
  61 # Remove the initial space we just introduced and, as these will be
  62 # expanded by make, quote '$'.
  63 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  64 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  65
  66 # Find the build, host, and target systems.
  67 ACX_NONCANONICAL_BUILD
  68 ACX_NONCANONICAL_HOST
  69 ACX_NONCANONICAL_TARGET
  70
  71 dnl Autoconf 2.5x and later will set a default program prefix if
  72 dnl --target was used, even if it was the same as --host.  Disable
  73 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  74 dnl to take effect.
  75 test "$host_noncanonical" = "$target_noncanonical" &&
  76   test "$program_prefix$program_suffix$program_transform_name" = \
  77     NONENONEs,x,x, &&
  78   program_transform_name=s,y,y,
  79
  80 AC_CANONICAL_SYSTEM
  81 AC_ARG_PROGRAM
  82
  83 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  84 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  85
  86 # Get 'install' or 'install-sh' and its variants.
  87 AC_PROG_INSTALL
  88 ACX_PROG_LN
  89 AC_PROG_LN_S
  90 AC_PROG_SED
  91 AC_PROG_AWK
  92
  93 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  94
  95 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  96 # a relative path.
  97 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  98   INSTALL="${srcpwd}/install-sh -c"
  99 fi
 100
 101 # Set srcdir to "." if that's what it is.
 102 # This is important for multilib support.
 103 pwd=`${PWDCMD-pwd}`
 104 if test "${pwd}" = "${srcpwd}" ; then
 105   srcdir=.
 106 fi
 107
 108 topsrcdir=$srcpwd
 109
 110 extra_host_args=
 111
 112 ### To add a new directory to the tree, first choose whether it is a target
 113 ### or a host dependent tool.  Then put it into the appropriate list
 114 ### (library or tools, host or target), doing a dependency sort.
 115
 116 # Subdirs will be configured in the order listed in build_configdirs,
 117 # configdirs, or target_configdirs; see the serialization section below.
 118
 119 # Dependency sorting is only needed when *configuration* must be done in
 120 # a particular order.  In all cases a dependency should be specified in
 121 # the Makefile, whether or not it's implicitly specified here.
 122
 123 # Double entries in build_configdirs, configdirs, or target_configdirs may
 124 # cause circular dependencies and break everything horribly.
 125
 126 # these library is used by various programs built for the build
 127 # environment
 128 #
 129 build_libs="build-libiberty"
 130
 131 # these tools are built for the build environment
 132 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 133
 134 # these libraries are used by various programs built for the host environment
 135 #
 136 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libdecnumber gmp mpfr mpc isl cloog libelf libiconv"
 137
 138 # these tools are built for the host environment
 139 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 140 # know that we are building the simulator.
 141 # binutils, gas and ld appear in that order because it makes sense to run
 142 # "make check" in that particular order.
 143 # If --enable-gold is used, "gold" may replace "ld".
 144 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gprof etc expect dejagnu m4 utils guile fastjar gnattools"
 145
 146 # libgcj represents the runtime libraries only used by gcj.
 147 libgcj="target-libffi \
 148         target-zlib \
 149         target-libjava"
 150
 151 # these libraries are built for the target environment, and are built after
 152 # the host libraries and the host tools (which may be a cross compiler)
 153 # Note that libiberty is not a target library.
 154 target_libraries="target-libgcc \
 155                 target-libbacktrace \
 156                 target-libgloss \
 157                 target-newlib \
 158                 target-libgomp \
 159                 target-libcilkrts \
 160                 target-libatomic \
 161                 target-libitm \
 162                 target-libstdc++-v3 \
 163                 target-libsanitizer \
 164                 target-libvtv \
 165                 target-libssp \
 166                 target-libquadmath \
 167                 target-libgfortran \
 168                 target-boehm-gc \
 169                 ${libgcj} \
 170                 target-libobjc \
 171                 target-libada \
 172                 target-libgo"
 173
 174 # these tools are built using the target libraries, and are intended to
 175 # run only in the target environment
 176 #
 177 # note: any program that *uses* libraries that are in the "target_libraries"
 178 # list belongs in this list.
 179 #
 180 target_tools="target-rda"
 181
 182 ################################################################################
 183
 184 ## All tools belong in one of the four categories, and are assigned above
 185 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 186 ## is important because configure will choke if they ever get through.
 187 ## ${configdirs} is directories we build using the host tools.
 188 ## ${target_configdirs} is directories we build using the target tools.
 189 configdirs=`echo ${host_libs} ${host_tools}`
 190 target_configdirs=`echo ${target_libraries} ${target_tools}`
 191 build_configdirs=`echo ${build_libs} ${build_tools}`
 192
 193 m4_divert_text([PARSE_ARGS],
 194 [case $srcdir in
 195   *" "*)
 196 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 197     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 198 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 199     ;;
 200 esac
 201 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 202 ])
 203
 204 ################################################################################
 205
 206 srcname="gnu development package"
 207
 208 # This gets set non-empty for some net releases of packages.
 209 appdirs=""
 210
 211 # Define is_cross_compiler to save on calls to 'test'.
 212 is_cross_compiler=
 213 if test x"${host}" = x"${target}" ; then
 214   is_cross_compiler=no
 215 else
 216   is_cross_compiler=yes
 217 fi
 218
 219 # Find the build and target subdir names.
 220 GCC_TOPLEV_SUBDIRS
 221 # Be sure to cover against remnants of an in-tree build.
 222 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 223   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 224 Use a pristine source tree when building in a separate tree])
 225 fi
 226
 227 # Skipdirs are removed silently.
 228 skipdirs=
 229 # Noconfigdirs are removed loudly.
 230 noconfigdirs=""
 231
 232 use_gnu_ld=
 233 # Make sure we don't let GNU ld be added if we didn't want it.
 234 if test x$with_gnu_ld = xno ; then
 235   use_gnu_ld=no
 236   noconfigdirs="$noconfigdirs ld gold"
 237 fi
 238
 239 use_gnu_as=
 240 # Make sure we don't let GNU as be added if we didn't want it.
 241 if test x$with_gnu_as = xno ; then
 242   use_gnu_as=no
 243   noconfigdirs="$noconfigdirs gas"
 244 fi
 245
 246 use_included_zlib=
 247 # Make sure we don't let ZLIB be added if we didn't want it.
 248 if test x$with_system_zlib = xyes ; then
 249   use_included_zlib=no
 250   noconfigdirs="$noconfigdirs zlib"
 251 fi
 252
 253 # some tools are so dependent upon X11 that if we're not building with X,
 254 # it's not even worth trying to configure, much less build, that tool.
 255
 256 case ${with_x} in
 257   yes | "") ;; # the default value for this tree is that X11 is available
 258   no)
 259     skipdirs="${skipdirs} tk itcl libgui"
 260     # We won't be able to build gdbtk without X.
 261     enable_gdbtk=no
 262     ;;
 263   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 264 esac
 265
 266 # Some are only suitable for cross toolchains.
 267 # Remove these if host=target.
 268 cross_only="target-libgloss target-newlib target-opcodes"
 269
 270 case $is_cross_compiler in
 271   no) skipdirs="${skipdirs} ${cross_only}" ;;
 272 esac
 273
 274 # If both --with-headers and --with-libs are specified, default to
 275 # --without-newlib.
 276 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 277    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 278   if test x"${with_newlib}" = x ; then
 279     with_newlib=no
 280   fi
 281 fi
 282
 283 # Recognize --with-newlib/--without-newlib.
 284 case ${with_newlib} in
 285   no) skipdirs="${skipdirs} target-newlib" ;;
 286   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 287 esac
 288
 289 # Handle --enable-gold, --enable-ld.
 290 # --disable-gold [--enable-ld]
 291 #     Build only ld.  Default option.
 292 # --enable-gold [--enable-ld]
 293 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 294 #     as "ld.bfd" and "ld".
 295 # --enable-gold=default [--enable-ld]
 296 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 297 #     install ld as "ld.bfd".
 298 # --enable-gold[=default] --disable-ld
 299 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 300 # --enable-gold --enable-ld=default
 301 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 302 #     and ld.bfd).
 303 #     In other words, ld is default
 304 # --enable-gold=default --enable-ld=default
 305 #     Error.
 306
 307 default_ld=
 308 AC_ARG_ENABLE(gold,
 309 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 310                 [build gold @<:@ARG={default,yes,no}@:>@])],
 311 ENABLE_GOLD=$enableval,
 312 ENABLE_GOLD=no)
 313 case "${ENABLE_GOLD}" in
 314   yes|default)
 315     # Check for ELF target.
 316     is_elf=no
 317     case "${target}" in
 318       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 319       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 320       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 321       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 322         case "${target}" in
 323           *-*-linux*aout* | *-*-linux*oldld*)
 324             ;;
 325           *)
 326             is_elf=yes
 327             ;;
 328         esac
 329     esac
 330
 331     if test "$is_elf" = "yes"; then
 332       # Check for target supported by gold.
 333       case "${target}" in
 334         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* | tilegx*-*-*)
 335           configdirs="$configdirs gold"
 336           if test x${ENABLE_GOLD} = xdefault; then
 337             default_ld=gold
 338           fi
 339           ENABLE_GOLD=yes
 340           ;;
 341       esac
 342     fi
 343     ;;
 344   no)
 345     ;;
 346   *)
 347     AC_MSG_ERROR([invalid --enable-gold argument])
 348     ;;
 349 esac
 350
 351 AC_ARG_ENABLE(ld,
 352 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 353                 [build ld @<:@ARG={default,yes,no}@:>@])],
 354 ENABLE_LD=$enableval,
 355 ENABLE_LD=yes)
 356
 357 case "${ENABLE_LD}" in
 358   default)
 359     if test x${default_ld} != x; then
 360       AC_MSG_ERROR([either gold or ld can be the default ld])
 361     fi
 362     ;;
 363   yes)
 364     ;;
 365   no)
 366     if test x${ENABLE_GOLD} != xyes; then
 367       AC_MSG_WARN([neither ld nor gold are enabled])
 368     fi
 369     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 370     ;;
 371   *)
 372     AC_MSG_ERROR([invalid --enable-ld argument])
 373     ;;
 374 esac
 375
 376 # Configure extra directories which are host specific
 377
 378 case "${host}" in
 379   *-cygwin*)
 380     configdirs="$configdirs libtermcap" ;;
 381 esac
 382
 383 # A target can indicate whether a language isn't supported for some reason.
 384 # Only spaces may be used in this macro; not newlines or tabs.
 385 unsupported_languages=
 386
 387 # Remove more programs from consideration, based on the host or
 388 # target this usually means that a port of the program doesn't
 389 # exist yet.
 390
 391 case "${host}" in
 392   i[[3456789]]86-*-msdosdjgpp*)
 393     noconfigdirs="$noconfigdirs tcl tk itcl"
 394     ;;
 395 esac
 396
 397
 398 AC_ARG_ENABLE(libquadmath,
 399 AS_HELP_STRING([--disable-libquadmath],
 400   [do not build libquadmath directory]),
 401 ENABLE_LIBQUADMATH=$enableval,
 402 ENABLE_LIBQUADMATH=yes)
 403 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 404   noconfigdirs="$noconfigdirs target-libquadmath"
 405 fi
 406
 407
 408 AC_ARG_ENABLE(libquadmath-support,
 409 AS_HELP_STRING([--disable-libquadmath-support],
 410   [disable libquadmath support for Fortran]),
 411 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 412 ENABLE_LIBQUADMATH_SUPPORT=yes)
 413 enable_libquadmath_support=
 414 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 415   enable_libquadmath_support=no
 416 fi
 417
 418
 419 AC_ARG_ENABLE(libada,
 420 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 421 ENABLE_LIBADA=$enableval,
 422 ENABLE_LIBADA=yes)
 423 if test "${ENABLE_LIBADA}" != "yes" ; then
 424   noconfigdirs="$noconfigdirs gnattools"
 425 fi
 426
 427 AC_ARG_ENABLE(libssp,
 428 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 429 ENABLE_LIBSSP=$enableval,
 430 ENABLE_LIBSSP=yes)
 431
 432 AC_ARG_ENABLE(libstdcxx,
 433 AS_HELP_STRING([--disable-libstdcxx],
 434   [do not build libstdc++-v3 directory]),
 435 ENABLE_LIBSTDCXX=$enableval,
 436 ENABLE_LIBSTDCXX=default)
 437 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 438   noconfigdirs="$noconfigdirs libstdc++-v3"
 439 fi]
 440
 441 # Save it here so that, even in case of --enable-libgcj, if the Java
 442 # front-end isn't enabled, we still get libgcj disabled.
 443 libgcj_saved=$libgcj
 444 case $enable_libgcj in
 445 yes)
 446   # If we reset it here, it won't get added to noconfigdirs in the
 447   # target-specific build rules, so it will be forcibly enabled
 448   # (unless the Java language itself isn't enabled).
 449   libgcj=
 450   ;;
 451 no)
 452   # Make sure we get it printed in the list of not supported target libs.
 453   # Don't disable libffi, though, other languages use it.
 454   noconfigdirs="$noconfigdirs `echo ${libgcj} | sed -e 's/target-libffi//'`"
 455   # Clear libgcj_saved so that even if java is enabled libffi won't be
 456   # built.
 457   libgcj_saved=
 458   ;;
 459 esac
 460
 461 AC_ARG_ENABLE(static-libjava,
 462 [AS_HELP_STRING([[--enable-static-libjava[=ARG]]],
 463                 [build static libjava @<:@default=no@:>@])],
 464 ENABLE_STATIC_LIBJAVA=$enableval,
 465 ENABLE_STATIC_LIBJAVA=no)
 466 enable_static_libjava=
 467 if test "${ENABLE_STATIC_LIBJAVA}" = "yes" ; then
 468   enable_static_libjava=yes
 469 fi
 470
 471 if test x$enable_static_libjava != xyes ; then
 472   EXTRA_CONFIGARGS_LIBJAVA=--disable-static
 473 fi
 474 AC_SUBST(EXTRA_CONFIGARGS_LIBJAVA)
 475
 476 # Disable libgomp on non POSIX hosted systems.
 477 if test x$enable_libgomp = x ; then
 478     # Enable libgomp by default on hosted POSIX systems.
 479     case "${target}" in
 480     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 481         ;;
 482     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 483         ;;
 484     *-*-solaris2* | *-*-hpux11*)
 485         ;;
 486     *-*-darwin* | *-*-aix*)
 487         ;;
 488     *)
 489         noconfigdirs="$noconfigdirs target-libgomp"
 490         ;;
 491     esac
 492 fi
 493
 494 # Disable libatomic on unsupported systems.
 495 if test -d ${srcdir}/libatomic; then
 496     if test x$enable_libatomic = x; then
 497         AC_MSG_CHECKING([for libatomic support])
 498         if (srcdir=${srcdir}/libatomic; \
 499                 . ${srcdir}/configure.tgt; \
 500                 test -n "$UNSUPPORTED")
 501         then
 502             AC_MSG_RESULT([no])
 503             noconfigdirs="$noconfigdirs target-libatomic"
 504         else
 505             AC_MSG_RESULT([yes])
 506         fi
 507     fi
 508 fi
 509
 510 # Disable libcilkrts on unsupported systems.
 511 if test -d ${srcdir}/libcilkrts; then
 512     if test x$enable_libcilkrts = x; then
 513         AC_MSG_CHECKING([for libcilkrts support])
 514         if (srcdir=${srcdir}/libcilkrts; \
 515                 . ${srcdir}/configure.tgt; \
 516                 test -n "$UNSUPPORTED")
 517         then
 518             AC_MSG_RESULT([no])
 519             noconfigdirs="$noconfigdirs target-libcilkrts"
 520         else
 521             AC_MSG_RESULT([yes])
 522         fi
 523     fi
 524 fi
 525
 526 # Disable libitm on unsupported systems.
 527 if test -d ${srcdir}/libitm; then
 528     if test x$enable_libitm = x; then
 529         AC_MSG_CHECKING([for libitm support])
 530         if (srcdir=${srcdir}/libitm; \
 531                 . ${srcdir}/configure.tgt; \
 532                 test -n "$UNSUPPORTED")
 533         then
 534             AC_MSG_RESULT([no])
 535             noconfigdirs="$noconfigdirs target-libitm"
 536         else
 537             AC_MSG_RESULT([yes])
 538         fi
 539     fi
 540 fi
 541
 542 # Disable libsanitizer on unsupported systems.
 543 if test -d ${srcdir}/libsanitizer; then
 544     if test x$enable_libsanitizer = x; then
 545         AC_MSG_CHECKING([for libsanitizer support])
 546         if (srcdir=${srcdir}/libsanitizer; \
 547                 . ${srcdir}/configure.tgt; \
 548                 test -n "$UNSUPPORTED")
 549         then
 550             AC_MSG_RESULT([no])
 551             noconfigdirs="$noconfigdirs target-libsanitizer"
 552         else
 553             AC_MSG_RESULT([yes])
 554         fi
 555     fi
 556 fi
 557
 558 # Disable libvtv on unsupported systems.
 559 if test -d ${srcdir}/libvtv; then
 560     if test x$enable_libvtv = x; then
 561         AC_MSG_CHECKING([for libvtv support])
 562         if (srcdir=${srcdir}/libvtv; \
 563                 . ${srcdir}/configure.tgt; \
 564                 test "$VTV_SUPPORTED" != "yes")
 565         then
 566             AC_MSG_RESULT([no])
 567             noconfigdirs="$noconfigdirs target-libvtv"
 568         else
 569             AC_MSG_RESULT([yes])
 570         fi
 571     fi
 572 fi
 573
 574 # Disable libquadmath for some systems.
 575 case "${target}" in
 576   avr-*-*)
 577     noconfigdirs="$noconfigdirs target-libquadmath"
 578     ;;
 579   # libquadmath is unused on AIX and libquadmath build process use of
 580   # LD_LIBRARY_PATH can break AIX bootstrap.
 581   powerpc-*-aix* | rs6000-*-aix*)
 582     noconfigdirs="$noconfigdirs target-libquadmath"
 583     ;;
 584 esac
 585
 586 # Disable libssp for some systems.
 587 case "${target}" in
 588   avr-*-*)
 589     # No hosted I/O support.
 590     noconfigdirs="$noconfigdirs target-libssp"
 591     ;;
 592   powerpc-*-aix* | rs6000-*-aix*)
 593     noconfigdirs="$noconfigdirs target-libssp"
 594     ;;
 595   rl78-*-*)
 596     # libssp uses a misaligned load to trigger a fault, but the RL78
 597     # doesn't fault for those - instead, it gives a build-time error
 598     # for explicit misaligned loads.
 599     noconfigdirs="$noconfigdirs target-libssp"
 600     ;;
 601 esac
 602
 603 # Disable libstdc++-v3 for some systems.
 604 # Allow user to override this if they pass --enable-libstdc++-v3
 605 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 606   case "${target}" in
 607     *-*-vxworks*)
 608       # VxWorks uses the Dinkumware C++ library.
 609       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 610       ;;
 611     arm*-wince-pe*)
 612       # the C++ libraries don't build on top of CE's C libraries
 613       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 614       ;;
 615     avr-*-*)
 616       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 617       ;;
 618   esac
 619 fi
 620
 621 # Disable Fortran for some systems.
 622 case "${target}" in
 623   mmix-*-*)
 624     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 625     unsupported_languages="$unsupported_languages fortran"
 626     ;;
 627 esac
 628
 629 # Disable Java if libffi is not supported.
 630 case "${target}" in
 631   aarch64-*-*)
 632     ;;
 633   alpha*-*-*)
 634     ;;
 635   arm*-*-*)
 636     ;;
 637   cris-*-*)
 638     ;;
 639   frv-*-*)
 640     ;;
 641   hppa*-*-linux*)
 642     ;;
 643   hppa*-*-hpux*)
 644     ;;
 645   i?86-*-*)
 646     ;;
 647   ia64*-*-*)
 648     ;;
 649   m32r*-*-*)
 650     ;;
 651   m68k-*-*)
 652     ;;
 653   mips*-*-rtems*)
 654     ;;
 655   mips*-*-linux*)
 656     ;;
 657   powerpc*-*-linux*)
 658     ;;
 659   powerpc-*-darwin*)
 660     ;;
 661   powerpc-*-aix* | rs6000-*-aix*)
 662     ;;
 663   powerpc-*-freebsd*)
 664     ;;
 665   powerpc64-*-freebsd*)
 666     ;;
 667   powerpc*-*-rtems*)
 668     ;;
 669   s390-*-* | s390x-*-*)
 670     ;;
 671   sh-*-* | sh[[34]]*-*-*)
 672     ;;
 673   sh64-*-* | sh5*-*-*)
 674     ;;
 675   sparc*-*-*)
 676     ;;
 677   x86_64-*-*)
 678     ;;
 679   *-*-*)
 680     unsupported_languages="$unsupported_languages java"
 681     ;;
 682 esac
 683
 684 # Disable Java, libgcj or related libraries for some systems.
 685 case "${target}" in
 686   powerpc-*-darwin*)
 687     ;;
 688   i[[3456789]]86-*-darwin*)
 689     ;;
 690   x86_64-*-darwin[[912]]*)
 691     ;;
 692   *-*-darwin*)
 693     noconfigdirs="$noconfigdirs ${libgcj}"
 694     ;;
 695   *-*-netware*)
 696     noconfigdirs="$noconfigdirs ${libgcj}"
 697     ;;
 698   *-*-rtems*)
 699     noconfigdirs="$noconfigdirs ${libgcj}"
 700     ;;
 701   *-*-tpf*)
 702     noconfigdirs="$noconfigdirs ${libgcj}"
 703     ;;
 704   *-*-uclinux*)
 705     noconfigdirs="$noconfigdirs ${libgcj}"
 706     ;;
 707   *-*-vxworks*)
 708     noconfigdirs="$noconfigdirs ${libgcj}"
 709     ;;
 710   alpha*-*-*vms*)
 711     noconfigdirs="$noconfigdirs ${libgcj}"
 712     ;;
 713   arm-wince-pe)
 714     noconfigdirs="$noconfigdirs ${libgcj}"
 715     ;;
 716   arm*-*-symbianelf*)
 717     noconfigdirs="$noconfigdirs ${libgcj}"
 718     ;;
 719   bfin-*-*)
 720     noconfigdirs="$noconfigdirs target-boehm-gc"
 721     ;;
 722   cris-*-* | crisv32-*-*)
 723     unsupported_languages="$unsupported_languages java"
 724     case "${target}" in
 725       *-*-linux*)
 726         ;;
 727       *) # See PR46792 regarding target-libffi.
 728         noconfigdirs="$noconfigdirs target-libffi target-boehm-gc";;
 729     esac
 730     ;;
 731   hppa*64*-*-linux*)
 732     # In this case, it's because the hppa64-linux target is for
 733     # the kernel only at this point and has no libc, and thus no
 734     # headers, crt*.o, etc., all of which are needed by these.
 735     unsupported_languages="$unsupported_languages java"
 736     ;;
 737   hppa*64*-*-hpux*)
 738     noconfigdirs="$noconfigdirs ${libgcj}"
 739     ;;
 740   hppa*-hp-hpux11*)
 741     ;;
 742   hppa*-*-hpux*)
 743     # According to Alexandre Oliva <aoliva@redhat.com>, libjava won't
 744     # build on HP-UX 10.20.
 745     noconfigdirs="$noconfigdirs ${libgcj}"
 746     ;;
 747   ia64*-*-*vms*)
 748     noconfigdirs="$noconfigdirs ${libgcj}"
 749     ;;
 750   i[[3456789]]86-w64-mingw*)
 751     noconfigdirs="$noconfigdirs ${libgcj}"
 752     ;;
 753   i[[3456789]]86-*-mingw*)
 754     noconfigdirs="$noconfigdirs ${libgcj}"
 755     ;;
 756   x86_64-*-mingw*)
 757     noconfigdirs="$noconfigdirs ${libgcj}"
 758     ;;
 759   mmix-*-*)
 760     noconfigdirs="$noconfigdirs target-libffi target-boehm-gc"
 761     ;;
 762   powerpc-*-aix*)
 763     # copied from rs6000-*-* entry
 764     noconfigdirs="$noconfigdirs ${libgcj}"
 765     ;;
 766   rs6000-*-aix*)
 767     noconfigdirs="$noconfigdirs ${libgcj}"
 768     ;;
 769   *-*-lynxos*)
 770     noconfigdirs="$noconfigdirs ${libgcj}"
 771     ;;
 772 esac
 773
 774 # Disable libgo for some systems where it is known to not work.
 775 # For testing, you can easily override this with --enable-libgo.
 776 if test x$enable_libgo = x; then
 777     case "${target}" in
 778     *-*-darwin*)
 779         # PR 46986
 780         noconfigdirs="$noconfigdirs target-libgo"
 781         ;;
 782     *-*-cygwin* | *-*-mingw*)
 783         noconfigdirs="$noconfigdirs target-libgo"
 784         ;;
 785     *-*-aix*)
 786         noconfigdirs="$noconfigdirs target-libgo"
 787         ;;
 788     esac
 789 fi
 790
 791 # Default libgloss CPU subdirectory.
 792 libgloss_dir="$target_cpu"
 793
 794 case "${target}" in
 795   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 796     libgloss_dir=wince
 797     ;;
 798   aarch64*-*-* )
 799     libgloss_dir=aarch64
 800     ;;
 801   arm*-*-*)
 802     libgloss_dir=arm
 803     ;;
 804   cris-*-* | crisv32-*-*)
 805     libgloss_dir=cris
 806     ;;
 807   hppa*-*-*)
 808     libgloss_dir=pa
 809     ;;
 810   i[[3456789]]86-*-*)
 811     libgloss_dir=i386
 812     ;;
 813   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 814     libgloss_dir=m68hc11
 815     ;;
 816   m68*-*-* | fido-*-*)
 817     libgloss_dir=m68k
 818     ;;
 819   mips*-*-*)
 820     libgloss_dir=mips
 821     ;;
 822   powerpc*-*-*)
 823     libgloss_dir=rs6000
 824     ;;
 825   sparc*-*-*)
 826     libgloss_dir=sparc
 827     ;;
 828 esac
 829
 830 # Disable newlib and libgloss for various target OSes.
 831 case "${target}" in
 832   alpha*-dec-osf*)
 833     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 834     ;;
 835   i[[3456789]]86-*-linux*)
 836     # This section makes it possible to build newlib natively on linux.
 837     # If we are using a cross compiler then don't configure newlib.
 838     if test x${is_cross_compiler} != xno ; then
 839       noconfigdirs="$noconfigdirs target-newlib"
 840     fi
 841     noconfigdirs="$noconfigdirs target-libgloss"
 842     # If we are not using a cross compiler, do configure newlib.
 843     # Note however, that newlib will only be configured in this situation
 844     # if the --with-newlib option has been given, because otherwise
 845     # 'target-newlib' will appear in skipdirs.
 846     ;;
 847   i[[3456789]]86-*-rdos*)
 848     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 849     ;;
 850   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 851     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 852     ;;
 853   sparc-*-sunos4*)
 854     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 855     ;;
 856   *-*-aix*)
 857     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 858     ;;
 859   *-*-beos*)
 860     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 861     ;;
 862   *-*-chorusos)
 863     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 864     ;;
 865   *-*-dragonfly*)
 866     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 867     ;;
 868   *-*-freebsd*)
 869     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 870     ;;
 871   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 872     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 873     ;;
 874   *-*-lynxos*)
 875     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 876     ;;
 877   *-*-mingw*)
 878     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 879     ;;
 880   *-*-netbsd*)
 881     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 882     ;;
 883   *-*-netware*)
 884     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 885     ;;
 886   *-*-tpf*)
 887     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 888     ;;
 889   *-*-uclinux*)
 890     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 891     ;;
 892   *-*-vxworks*)
 893     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 894     ;;
 895 esac
 896
 897 case "${target}" in
 898   *-*-chorusos)
 899     ;;
 900   powerpc-*-darwin*)
 901     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 902     noconfigdirs="$noconfigdirs sim target-rda"
 903     ;;
 904   i[[3456789]]86-*-darwin*)
 905     noconfigdirs="$noconfigdirs ld gprof"
 906     noconfigdirs="$noconfigdirs sim target-rda"
 907     ;;
 908   x86_64-*-darwin[[912]]*)
 909     noconfigdirs="$noconfigdirs ld gas gprof"
 910     noconfigdirs="$noconfigdirs sim target-rda"
 911     ;;
 912   *-*-darwin*)
 913     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 914     noconfigdirs="$noconfigdirs sim target-rda"
 915     ;;
 916   *-*-dragonfly*)
 917     ;;
 918   *-*-freebsd*)
 919     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
 920         && test -f /usr/local/include/gmp.h; then
 921       with_gmp=/usr/local
 922     fi
 923     ;;
 924   *-*-kaos*)
 925     # Remove unsupported stuff on all kaOS configurations.
 926     noconfigdirs="$noconfigdirs target-libgloss"
 927     ;;
 928   *-*-netbsd*)
 929     ;;
 930   *-*-netware*)
 931     ;;
 932   *-*-rtems*)
 933     noconfigdirs="$noconfigdirs target-libgloss"
 934     # this is not caught below because this stanza matches earlier
 935     case $target in
 936       or1k*-*-*) noconfigdirs="$noconfigdirs gdb" ;;
 937     esac
 938     ;;
 939     # The tpf target doesn't support gdb yet.
 940   *-*-tpf*)
 941     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
 942     ;;
 943   *-*-uclinux*)
 944     noconfigdirs="$noconfigdirs target-rda"
 945     ;;
 946   *-*-vxworks*)
 947     ;;
 948   alpha*-dec-osf*)
 949     # ld works, but does not support shared libraries.
 950     # gas doesn't generate exception information.
 951     noconfigdirs="$noconfigdirs gas ld"
 952     ;;
 953   alpha*-*-*vms*)
 954     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
 955     ;;
 956   alpha*-*-*)
 957     # newlib is not 64 bit ready
 958     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 959     ;;
 960   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 961     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
 962     ;;
 963   arc-*-*|arceb-*-*)
 964     noconfigdirs="$noconfigdirs target-libgloss"
 965     ;;
 966   arm-*-pe*)
 967     noconfigdirs="$noconfigdirs target-libgloss"
 968     ;;
 969   arm-*-riscix*)
 970     noconfigdirs="$noconfigdirs ld target-libgloss"
 971     ;;
 972   avr-*-rtems*)
 973     ;;
 974   avr-*-*)
 975     if test x${with_avrlibc} != xno; then
 976       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 977     fi
 978     ;;
 979   c4x-*-* | tic4x-*-*)
 980     noconfigdirs="$noconfigdirs target-libgloss"
 981     ;;
 982   tic54x-*-*)
 983     noconfigdirs="$noconfigdirs target-libgloss gdb"
 984     ;;
 985   d10v-*-*)
 986     noconfigdirs="$noconfigdirs target-libgloss"
 987     ;;
 988   d30v-*-*)
 989     noconfigdirs="$noconfigdirs gdb"
 990     ;;
 991   fr30-*-elf*)
 992     noconfigdirs="$noconfigdirs gdb"
 993     ;;
 994   moxie-*-*)
 995     noconfigdirs="$noconfigdirs gprof"
 996     ;;
 997   h8300*-*-*)
 998     noconfigdirs="$noconfigdirs target-libgloss"
 999     ;;
1000   h8500-*-*)
1001     noconfigdirs="$noconfigdirs target-libgloss"
1002     ;;
1003   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1004     ;;
1005   hppa*64*-*-linux*)
1006     ;;
1007   hppa*-*-linux*)
1008     ;;
1009   hppa*-*-*elf* | \
1010   hppa*-*-lites* | \
1011   hppa*-*-openbsd* | \
1012   hppa*64*-*-*)
1013     ;;
1014   hppa*-hp-hpux11*)
1015     noconfigdirs="$noconfigdirs ld"
1016     ;;
1017   hppa*-*-pro*)
1018     ;;
1019   hppa*-*-*)
1020     noconfigdirs="$noconfigdirs ld"
1021     ;;
1022   i960-*-*)
1023     noconfigdirs="$noconfigdirs gdb"
1024     ;;
1025   ia64*-*-elf*)
1026     # No gdb support yet.
1027     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1028     ;;
1029   ia64*-**-hpux*)
1030     # No ld support yet.
1031     noconfigdirs="$noconfigdirs libgui itcl ld"
1032     ;;
1033   ia64*-*-*vms*)
1034     # No ld support yet.
1035     noconfigdirs="$noconfigdirs libgui itcl ld"
1036     ;;
1037   i[[3456789]]86-w64-mingw*)
1038     ;;
1039   i[[3456789]]86-*-mingw*)
1040     target_configdirs="$target_configdirs target-winsup"
1041     ;;
1042   *-*-cygwin*)
1043     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1044     noconfigdirs="$noconfigdirs target-libgloss"
1045     # always build newlib if winsup directory is present.
1046     if test -d "$srcdir/winsup/cygwin"; then
1047       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1048     elif test -d "$srcdir/newlib"; then
1049       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1050     fi
1051     ;;
1052   i[[3456789]]86-*-pe)
1053     noconfigdirs="$noconfigdirs target-libgloss"
1054     ;;
1055   i[[3456789]]86-*-sco3.2v5*)
1056     # The linker does not yet know about weak symbols in COFF,
1057     # and is not configured to handle mixed ELF and COFF.
1058     noconfigdirs="$noconfigdirs ld target-libgloss"
1059     ;;
1060   i[[3456789]]86-*-sco*)
1061     noconfigdirs="$noconfigdirs gprof target-libgloss"
1062     ;;
1063   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1064     noconfigdirs="$noconfigdirs target-libgloss"
1065     ;;
1066   i[[3456789]]86-*-sysv4*)
1067     noconfigdirs="$noconfigdirs target-libgloss"
1068     ;;
1069   i[[3456789]]86-*-beos*)
1070     noconfigdirs="$noconfigdirs gdb"
1071     ;;
1072   i[[3456789]]86-*-rdos*)
1073     noconfigdirs="$noconfigdirs gdb"
1074     ;;
1075   mmix-*-*)
1076     noconfigdirs="$noconfigdirs gdb"
1077     ;;
1078   mt-*-*)
1079     noconfigdirs="$noconfigdirs sim"
1080     ;;
1081   powerpc-*-aix*)
1082     # copied from rs6000-*-* entry
1083     noconfigdirs="$noconfigdirs gprof"
1084     ;;
1085   powerpc*-*-winnt* | powerpc*-*-pe*)
1086     target_configdirs="$target_configdirs target-winsup"
1087     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1088     # always build newlib.
1089     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1090     ;;
1091     # This is temporary until we can link against shared libraries
1092   powerpcle-*-solaris*)
1093     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1094     ;;
1095   powerpc-*-beos*)
1096     noconfigdirs="$noconfigdirs gdb"
1097     ;;
1098   rs6000-*-lynxos*)
1099     noconfigdirs="$noconfigdirs gprof"
1100     ;;
1101   rs6000-*-aix*)
1102     noconfigdirs="$noconfigdirs gprof"
1103     ;;
1104   rs6000-*-*)
1105     noconfigdirs="$noconfigdirs gprof"
1106     ;;
1107   m68k-apollo-*)
1108     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1109     ;;
1110   microblaze*)
1111     noconfigdirs="$noconfigdirs gprof"
1112     ;;
1113   mips*-sde-elf* | mips*-mti-elf*)
1114     if test x$with_newlib = xyes; then
1115       noconfigdirs="$noconfigdirs gprof"
1116     fi
1117     ;;
1118   mips*-*-irix5*)
1119     noconfigdirs="$noconfigdirs gprof target-libgloss"
1120     ;;
1121   mips*-*-irix6*)
1122     noconfigdirs="$noconfigdirs gprof target-libgloss"
1123     ;;
1124   mips*-*-bsd*)
1125     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1126     ;;
1127   mips*-*-linux*)
1128     ;;
1129   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1130   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1131     noconfigdirs="$noconfigdirs ld gas gprof"
1132     ;;
1133   mips*-*-*)
1134     noconfigdirs="$noconfigdirs gprof"
1135     ;;
1136   or1k*-*-*)
1137     noconfigdirs="$noconfigdirs gdb"
1138     ;;
1139   sh-*-* | sh64-*-*)
1140     case "${target}" in
1141       sh*-*-elf)
1142          ;;
1143       *)
1144          noconfigdirs="$noconfigdirs target-libgloss" ;;
1145     esac
1146     ;;
1147   sparc-*-sunos4*)
1148     if test x${is_cross_compiler} = xno ; then
1149            use_gnu_ld=no
1150     fi
1151     ;;
1152   tic6x-*-*)
1153     noconfigdirs="$noconfigdirs sim"
1154     ;;
1155   tilepro*-*-* | tilegx*-*-*)
1156     noconfigdirs="$noconfigdirs sim"
1157     ;;
1158   v810-*-*)
1159     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1160     ;;
1161   vax-*-*)
1162     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1163     ;;
1164 esac
1165
1166 # If we aren't building newlib, then don't build libgloss, since libgloss
1167 # depends upon some newlib header files.
1168 case "${noconfigdirs}" in
1169   *target-libgloss*) ;;
1170   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1171 esac
1172
1173 # Work in distributions that contain no compiler tools, like Autoconf.
1174 host_makefile_frag=/dev/null
1175 if test -d ${srcdir}/config ; then
1176 case "${host}" in
1177   i[[3456789]]86-*-msdosdjgpp*)
1178     host_makefile_frag="config/mh-djgpp"
1179     ;;
1180   *-cygwin*)
1181     ACX_CHECK_CYGWIN_CAT_WORKS
1182     host_makefile_frag="config/mh-cygwin"
1183     ;;
1184   *-mingw*)
1185     host_makefile_frag="config/mh-mingw"
1186     ;;
1187   hppa*-hp-hpux10*)
1188     host_makefile_frag="config/mh-pa-hpux10"
1189     ;;
1190   hppa*-hp-hpux*)
1191     host_makefile_frag="config/mh-pa"
1192     ;;
1193   hppa*-*)
1194     host_makefile_frag="config/mh-pa"
1195     ;;
1196   *-*-darwin*)
1197     host_makefile_frag="config/mh-darwin"
1198     ;;
1199   powerpc-*-aix*)
1200     host_makefile_frag="config/mh-ppc-aix"
1201     ;;
1202   rs6000-*-aix*)
1203     host_makefile_frag="config/mh-ppc-aix"
1204     ;;
1205 esac
1206 fi
1207
1208 if test "${build}" != "${host}" ; then
1209   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1210   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1211   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1212   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1213   GCJ_FOR_BUILD=${GCJ_FOR_BUILD-gcj}
1214   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1215   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1216   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1217   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1218   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1219   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1220   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1221   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1222 else
1223   AR_FOR_BUILD="\$(AR)"
1224   AS_FOR_BUILD="\$(AS)"
1225   CC_FOR_BUILD="\$(CC)"
1226   CXX_FOR_BUILD="\$(CXX)"
1227   GCJ_FOR_BUILD="\$(GCJ)"
1228   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1229   GOC_FOR_BUILD="\$(GOC)"
1230   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1231   LD_FOR_BUILD="\$(LD)"
1232   NM_FOR_BUILD="\$(NM)"
1233   RANLIB_FOR_BUILD="\$(RANLIB)"
1234   WINDRES_FOR_BUILD="\$(WINDRES)"
1235   WINDMC_FOR_BUILD="\$(WINDMC)"
1236 fi
1237
1238 AC_PROG_CC
1239 AC_PROG_CXX
1240
1241 # We must set the default linker to the linker used by gcc for the correct
1242 # operation of libtool.  If LD is not defined and we are using gcc, try to
1243 # set the LD default to the ld used by gcc.
1244 if test -z "$LD"; then
1245   if test "$GCC" = yes; then
1246     case $build in
1247     *-*-mingw*)
1248       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1249     *)
1250       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1251     esac
1252     case $gcc_prog_ld in
1253     # Accept absolute paths.
1254     [[\\/]* | [A-Za-z]:[\\/]*)]
1255       LD="$gcc_prog_ld" ;;
1256     esac
1257   fi
1258 fi
1259
1260 # Check whether -static-libstdc++ -static-libgcc is supported.
1261 have_static_libs=no
1262 if test "$GCC" = yes; then
1263   saved_LDFLAGS="$LDFLAGS"
1264
1265   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1266   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1267   AC_LANG_PUSH(C++)
1268   AC_LINK_IFELSE([
1269 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1270 #error -static-libstdc++ not implemented
1271 #endif
1272 int main() {}],
1273     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1274     [AC_MSG_RESULT([no])])
1275   AC_LANG_POP(C++)
1276
1277   LDFLAGS="$saved_LDFLAGS"
1278 fi
1279
1280 ACX_PROG_GNAT
1281 ACX_PROG_CMP_IGNORE_INITIAL
1282
1283 AC_ARG_ENABLE([bootstrap],
1284 [AS_HELP_STRING([--enable-bootstrap],
1285                 [enable bootstrapping @<:@yes if native build@:>@])],,
1286 enable_bootstrap=default)
1287
1288 # Issue errors and warnings for invalid/strange bootstrap combinations.
1289 if test -r $srcdir/gcc/configure; then
1290   have_compiler=yes
1291 else
1292   have_compiler=no
1293 fi
1294
1295 case "$have_compiler:$host:$target:$enable_bootstrap" in
1296   *:*:*:no) ;;
1297
1298   # Default behavior.  Enable bootstrap if we have a compiler
1299   # and we are in a native configuration.
1300   yes:$build:$build:default)
1301     enable_bootstrap=yes ;;
1302
1303   *:*:*:default)
1304     enable_bootstrap=no ;;
1305
1306   # We have a compiler and we are in a native configuration, bootstrap is ok
1307   yes:$build:$build:yes)
1308     ;;
1309
1310   # Other configurations, but we have a compiler.  Assume the user knows
1311   # what he's doing.
1312   yes:*:*:yes)
1313     AC_MSG_WARN([trying to bootstrap a cross compiler])
1314     ;;
1315
1316   # No compiler: if they passed --enable-bootstrap explicitly, fail
1317   no:*:*:yes)
1318     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1319
1320   # Fail if wrong command line
1321   *)
1322     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1323     ;;
1324 esac
1325
1326 # Used for setting $lt_cv_objdir
1327 _LT_CHECK_OBJDIR
1328
1329 # Check for GMP, MPFR and MPC
1330 gmplibs="-lmpc -lmpfr -lgmp"
1331 gmpinc=
1332 have_gmp=no
1333
1334 # Specify a location for mpc
1335 # check for this first so it ends up on the link line before mpfr.
1336 AC_ARG_WITH(mpc,
1337 [AS_HELP_STRING([--with-mpc=PATH],
1338                 [specify prefix directory for installed MPC package.
1339                  Equivalent to --with-mpc-include=PATH/include
1340                  plus --with-mpc-lib=PATH/lib])])
1341 AC_ARG_WITH(mpc-include,
1342 [AS_HELP_STRING([--with-mpc-include=PATH],
1343                 [specify directory for installed MPC include files])])
1344 AC_ARG_WITH(mpc-lib,
1345 [AS_HELP_STRING([--with-mpc-lib=PATH],
1346                 [specify directory for the installed MPC library])])
1347
1348 if test "x$with_mpc" != x; then
1349   gmplibs="-L$with_mpc/lib $gmplibs"
1350   gmpinc="-I$with_mpc/include $gmpinc"
1351 fi
1352 if test "x$with_mpc_include" != x; then
1353   gmpinc="-I$with_mpc_include $gmpinc"
1354 fi
1355 if test "x$with_mpc_lib" != x; then
1356   gmplibs="-L$with_mpc_lib $gmplibs"
1357 fi
1358 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1359   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1360   gmpinc='-I$$s/mpc/src '"$gmpinc"
1361   # Do not test the mpc version.  Assume that it is sufficient, since
1362   # it is in the source tree, and the library has not been built yet
1363   # but it would be included on the link line in the version check below
1364   # hence making the test fail.
1365   have_gmp=yes
1366 fi
1367
1368 # Specify a location for mpfr
1369 # check for this first so it ends up on the link line before gmp.
1370 AC_ARG_WITH(mpfr-dir,
1371 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1372 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1373 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1374
1375 AC_ARG_WITH(mpfr,
1376 [AS_HELP_STRING([--with-mpfr=PATH],
1377                 [specify prefix directory for installed MPFR package.
1378                  Equivalent to --with-mpfr-include=PATH/include
1379                  plus --with-mpfr-lib=PATH/lib])])
1380 AC_ARG_WITH(mpfr-include,
1381 [AS_HELP_STRING([--with-mpfr-include=PATH],
1382                 [specify directory for installed MPFR include files])])
1383 AC_ARG_WITH(mpfr-lib,
1384 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1385                 [specify directory for the installed MPFR library])])
1386
1387 if test "x$with_mpfr" != x; then
1388   gmplibs="-L$with_mpfr/lib $gmplibs"
1389   gmpinc="-I$with_mpfr/include $gmpinc"
1390 fi
1391 if test "x$with_mpfr_include" != x; then
1392   gmpinc="-I$with_mpfr_include $gmpinc"
1393 fi
1394 if test "x$with_mpfr_lib" != x; then
1395   gmplibs="-L$with_mpfr_lib $gmplibs"
1396 fi
1397 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1398   # MPFR v3.1.0 moved the sources into a src sub-directory.
1399   if test -d ${srcdir}/mpfr/src; then
1400     gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1401     gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1402     extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1403   else
1404     gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir $gmplibs"
1405     gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr -I$$s/mpfr '"$gmpinc"
1406     extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir"
1407   fi
1408   # Do not test the mpfr version.  Assume that it is sufficient, since
1409   # it is in the source tree, and the library has not been built yet
1410   # but it would be included on the link line in the version check below
1411   # hence making the test fail.
1412   have_gmp=yes
1413 fi
1414
1415 # Specify a location for gmp
1416 AC_ARG_WITH(gmp-dir,
1417 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1418 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1419 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1420
1421 AC_ARG_WITH(gmp,
1422 [AS_HELP_STRING([--with-gmp=PATH],
1423                 [specify prefix directory for the installed GMP package.
1424                  Equivalent to --with-gmp-include=PATH/include
1425                  plus --with-gmp-lib=PATH/lib])])
1426 AC_ARG_WITH(gmp-include,
1427 [AS_HELP_STRING([--with-gmp-include=PATH],
1428                 [specify directory for installed GMP include files])])
1429 AC_ARG_WITH(gmp-lib,
1430 [AS_HELP_STRING([--with-gmp-lib=PATH],
1431                 [specify directory for the installed GMP library])])
1432
1433
1434 if test "x$with_gmp" != x; then
1435   gmplibs="-L$with_gmp/lib $gmplibs"
1436   gmpinc="-I$with_gmp/include $gmpinc"
1437 fi
1438 if test "x$with_gmp_include" != x; then
1439   gmpinc="-I$with_gmp_include $gmpinc"
1440 fi
1441 if test "x$with_gmp_lib" != x; then
1442   gmplibs="-L$with_gmp_lib $gmplibs"
1443 fi
1444 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1445   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1446   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1447   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1448   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1449   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1450   # Do not test the gmp version.  Assume that it is sufficient, since
1451   # it is in the source tree, and the library has not been built yet
1452   # but it would be included on the link line in the version check below
1453   # hence making the test fail.
1454   have_gmp=yes
1455 fi
1456
1457 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1458   have_gmp=yes
1459   saved_CFLAGS="$CFLAGS"
1460   CFLAGS="$CFLAGS $gmpinc"
1461   # Check for the recommended and required versions of GMP.
1462   AC_MSG_CHECKING([for the correct version of gmp.h])
1463   AC_TRY_COMPILE([#include "gmp.h"],[
1464   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1465   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1466   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1467   choke me
1468   #endif
1469   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1470   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1471   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1472   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1473   choke me
1474   #endif
1475   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1476    [AC_MSG_RESULT([no]); have_gmp=no])
1477
1478   # If we have GMP, check the MPFR version.
1479   if test x"$have_gmp" = xyes; then
1480     # Check for the recommended and required versions of MPFR.
1481     AC_MSG_CHECKING([for the correct version of mpfr.h])
1482     AC_TRY_COMPILE([#include <gmp.h>
1483     #include <mpfr.h>],[
1484     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,0)
1485     choke me
1486     #endif
1487     ], [AC_TRY_COMPILE([#include <gmp.h>
1488     #include <mpfr.h>],[
1489     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,2)
1490     choke me
1491     #endif
1492     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1493      [AC_MSG_RESULT([no]); have_gmp=no])
1494   fi
1495
1496   # Check for the MPC header version.
1497   if test x"$have_gmp" = xyes ; then
1498     # Check for the recommended and required versions of MPC.
1499     AC_MSG_CHECKING([for the correct version of mpc.h])
1500     AC_TRY_COMPILE([#include <mpc.h>],[
1501     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1502     choke me
1503     #endif
1504     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1505     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1506     choke me
1507     #endif
1508     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1509      [AC_MSG_RESULT([no]); have_gmp=no])
1510   fi
1511
1512   # Now check the MPFR library.
1513   if test x"$have_gmp" = xyes; then
1514     saved_LIBS="$LIBS"
1515     LIBS="$LIBS $gmplibs"
1516     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1517     AC_TRY_LINK([#include <mpc.h>],[
1518     mpfr_t n;
1519     mpfr_t x;
1520     mpc_t c;
1521     int t;
1522     mpfr_init (n);
1523     mpfr_init (x);
1524     mpfr_atan2 (n, n, x, GMP_RNDN);
1525     mpfr_erfc (n, x, GMP_RNDN);
1526     mpfr_subnormalize (x, t, GMP_RNDN);
1527     mpfr_clear(n);
1528     mpfr_clear(x);
1529     mpc_init2 (c, 53);
1530     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1531     mpc_cosh (c, c, MPC_RNDNN);
1532     mpc_pow (c, c, c, MPC_RNDNN);
1533     mpc_acosh (c, c, MPC_RNDNN);
1534     mpc_clear (c);
1535     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1536     LIBS="$saved_LIBS"
1537   fi
1538
1539   CFLAGS="$saved_CFLAGS"
1540
1541 # The library versions listed in the error message below should match
1542 # the HARD-minimums enforced above.
1543   if test x$have_gmp != xyes; then
1544     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
1545 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1546 their locations.  Source code for these libraries can be found at
1547 their respective hosting sites as well as at
1548 ftp://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1549 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1550 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1551 make sure that you have installed both the libraries and the header
1552 files.  They may be located in separate packages.])
1553   fi
1554 fi
1555
1556 # Flags needed for both GMP, MPFR and/or MPC.
1557 AC_SUBST(gmplibs)
1558 AC_SUBST(gmpinc)
1559 AC_SUBST(extra_mpfr_configure_flags)
1560 AC_SUBST(extra_mpc_gmp_configure_flags)
1561 AC_SUBST(extra_mpc_mpfr_configure_flags)
1562 AC_SUBST(extra_isl_gmp_configure_flags)
1563
1564 # Allow host libstdc++ to be specified for static linking with PPL.
1565 AC_ARG_WITH(host-libstdcxx,
1566 [AS_HELP_STRING([--with-host-libstdcxx=L],
1567                 [use linker arguments L to link with libstdc++
1568                  when linking with PPL])])
1569
1570 case $with_host_libstdcxx in
1571   no|yes)
1572     AC_MSG_ERROR([-with-host-libstdcxx needs an argument])
1573     ;;
1574 esac
1575
1576 # Libraries to use for stage1 or when not bootstrapping.
1577 AC_ARG_WITH(stage1-libs,
1578 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1579 [if test "$withval" = "no" -o "$withval" = "yes"; then
1580    stage1_libs=
1581  else
1582    stage1_libs=$withval
1583  fi],
1584 [stage1_libs=$with_host_libstdcxx])
1585 AC_SUBST(stage1_libs)
1586
1587 # Linker flags to use for stage1 or when not bootstrapping.
1588 AC_ARG_WITH(stage1-ldflags,
1589 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1590 [if test "$withval" = "no" -o "$withval" = "yes"; then
1591    stage1_ldflags=
1592  else
1593    stage1_ldflags=$withval
1594  fi],
1595 [stage1_ldflags=
1596  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1597  # if supported.  But if the user explicitly specified the libraries to use,
1598  # trust that they are doing what they want.
1599  if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
1600    stage1_ldflags="-static-libstdc++ -static-libgcc"
1601  fi])
1602 AC_SUBST(stage1_ldflags)
1603
1604 # Libraries to use for stage2 and later builds.  This defaults to the
1605 # argument passed to --with-host-libstdcxx.
1606 AC_ARG_WITH(boot-libs,
1607 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1608 [if test "$withval" = "no" -o "$withval" = "yes"; then
1609    poststage1_libs=
1610  else
1611    poststage1_libs=$withval
1612  fi],
1613 [poststage1_libs=$with_host_libstdcxx])
1614 AC_SUBST(poststage1_libs)
1615
1616 # Linker flags to use for stage2 and later builds.
1617 AC_ARG_WITH(boot-ldflags,
1618 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1619                 [linker flags for stage2 and later])],
1620 [if test "$withval" = "no" -o "$withval" = "yes"; then
1621    poststage1_ldflags=
1622  else
1623    poststage1_ldflags=$withval
1624  fi],
1625 [poststage1_ldflags=
1626  # In stages 2 and 3, default to linking libstdc++ and libgcc
1627  # statically.  But if the user explicitly specified the libraries to
1628  # use, trust that they are doing what they want.
1629  if test "$poststage1_libs" = ""; then
1630    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1631  fi])
1632 AC_SUBST(poststage1_ldflags)
1633
1634 # GCC GRAPHITE dependences, ISL and CLOOG which in turn requires ISL.
1635 # Basic setup is inlined here, actual checks are in config/cloog.m4 and
1636 # config/isl.m4
1637
1638 AC_ARG_WITH(cloog,
1639   [AS_HELP_STRING(
1640     [--with-cloog=PATH],
1641     [Specify prefix directory for the installed CLooG-ISL package.
1642      Equivalent to --with-cloog-include=PATH/include
1643      plus --with-cloog-lib=PATH/lib])])
1644 AC_ARG_WITH(isl,
1645   [AS_HELP_STRING(
1646    [--with-isl=PATH],
1647    [Specify prefix directory for the installed ISL package.
1648     Equivalent to --with-isl-include=PATH/include
1649     plus --with-isl-lib=PATH/lib])])
1650
1651 # Treat either --without-cloog or --without-isl as a request to disable
1652 # GRAPHITE support and skip all following checks.
1653 if test "x$with_isl" != "xno" &&
1654    test "x$with_cloog" != "xno"; then
1655   # Check for ISL
1656   dnl Provide configure switches and initialize islinc & isllibs
1657   dnl with user input.
1658   ISL_INIT_FLAGS
1659   dnl The versions of ISL that work for Graphite
1660   ISL_CHECK_VERSION(0,10)
1661   if test "${gcc_cv_isl}" = no ; then
1662     ISL_CHECK_VERSION(0,11)
1663     if test "${gcc_cv_isl}" = no ; then
1664       ISL_CHECK_VERSION(0,12)
1665     fi
1666   fi
1667   dnl Only execute fail-action, if ISL has been requested.
1668   ISL_IF_FAILED([
1669     AC_MSG_ERROR([Unable to find a usable ISL.  See config.log for details.])])
1670
1671   if test "x$gcc_cv_isl" != "xno"; then
1672     # Check for CLOOG
1673     dnl Provide configure switches and initialize clooginc & clooglibs
1674     dnl with user input.
1675     CLOOG_INIT_FLAGS
1676     dnl The versions of CLooG that work for Graphite.
1677     CLOOG_CHECK_VERSION(0,17,0)
1678     if test "${gcc_cv_cloog}" = no ; then
1679       CLOOG_CHECK_VERSION(0,18,0)
1680     fi
1681
1682     dnl Only execute fail-action, if CLooG has been requested.
1683     CLOOG_IF_FAILED([
1684       AC_MSG_ERROR([Unable to find a usable CLooG.  See config.log for details.])])
1685   fi
1686 fi
1687
1688 # If either the ISL or the CLooG check failed, disable builds of in-tree
1689 # variants of both
1690 if test "x$with_isl" = xno ||
1691    test "x$with_cloog" = xno ||
1692    test "x$gcc_cv_cloog" = xno ||
1693    test "x$gcc_cv_isl" = xno; then
1694   noconfigdirs="$noconfigdirs cloog isl"
1695   islinc=
1696   clooginc=
1697   clooglibs=
1698 fi
1699
1700 AC_SUBST(islinc)
1701 AC_SUBST(clooglibs)
1702 AC_SUBST(clooginc)
1703
1704
1705 # Check for LTO support.
1706 AC_ARG_ENABLE(lto,
1707 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1708 enable_lto=$enableval,
1709 enable_lto=yes; default_enable_lto=yes)
1710
1711 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1712   build_lto_plugin=yes
1713 ],[if test x"$default_enable_lto" = x"yes" ; then
1714     case $target in
1715       *-apple-darwin9* | *-cygwin* | *-mingw*) ;;
1716       # On other non-ELF platforms, LTO has yet to be validated.
1717       *) enable_lto=no ;;
1718     esac
1719   else
1720   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1721   # It would also be nice to check the binutils support, but we don't
1722   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1723   # warn during gcc/ subconfigure; unless you're bootstrapping with
1724   # -flto it won't be needed until after installation anyway.
1725     case $target in
1726       *-cygwin* | *-mingw* | *-apple-darwin*) ;;
1727       *) if test x"$enable_lto" = x"yes"; then
1728         AC_MSG_ERROR([LTO support is not enabled for this target.])
1729         fi
1730       ;;
1731     esac
1732   fi
1733   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1734   # Build it unless LTO was explicitly disabled.
1735   case $target in
1736     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1737     *) ;;
1738   esac
1739 ])
1740
1741
1742 # By default, C and C++ are the only stage 1 languages.
1743 stage1_languages=,c,
1744
1745 # Target libraries that we bootstrap.
1746 bootstrap_target_libs=,target-libgcc,
1747
1748 # Figure out what language subdirectories are present.
1749 # Look if the user specified --enable-languages="..."; if not, use
1750 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1751 # go away some day.
1752 # NB:  embedded tabs in this IF block -- do not untabify
1753 if test -d ${srcdir}/gcc; then
1754   if test x"${enable_languages+set}" != xset; then
1755     if test x"${LANGUAGES+set}" = xset; then
1756       enable_languages="${LANGUAGES}"
1757         echo configure.in: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1758     else
1759       enable_languages=all
1760     fi
1761   else
1762     if test x"${enable_languages}" = x ||
1763        test x"${enable_languages}" = xyes;
1764        then
1765       echo configure.in: --enable-languages needs at least one language argument 1>&2
1766       exit 1
1767     fi
1768   fi
1769   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1770
1771   # 'f95' is the old name for the 'fortran' language. We issue a warning
1772   # and make the substitution.
1773   case ,${enable_languages}, in
1774     *,f95,*)
1775       echo configure.in: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1776       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1777       ;;
1778   esac
1779
1780   # If bootstrapping, C++ must be enabled.
1781   case ",$enable_languages,:$enable_bootstrap" in
1782     *,c++,*:*) ;;
1783     *:yes)
1784       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1785         enable_languages="${enable_languages},c++"
1786       else
1787         AC_MSG_ERROR([bootstrapping requires c++ sources])
1788       fi
1789       ;;
1790   esac
1791
1792   # First scan to see if an enabled language requires some other language.
1793   # We assume that a given config-lang.in will list all the language
1794   # front ends it requires, even if some are required indirectly.
1795   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1796     case ${lang_frag} in
1797       ..) ;;
1798       # The odd quoting in the next line works around
1799       # an apparent bug in bash 1.12 on linux.
1800       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1801       *)
1802         # From the config-lang.in, get $language, $lang_requires, and
1803         # $lang_requires_boot_languages.
1804         language=
1805         lang_requires=
1806         lang_requires_boot_languages=
1807         . ${lang_frag}
1808         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1809           case ,${enable_languages}, in
1810             *,$other,*) ;;
1811             *,all,*) ;;
1812             *,$language,*)
1813               echo " \`$other' language required by \`$language'; enabling" 1>&2
1814               enable_languages="${enable_languages},${other}"
1815               ;;
1816           esac
1817         done
1818         for other in ${lang_requires_boot_languages} ; do
1819           if test "$other" != "c"; then
1820             case ,${enable_stage1_languages}, in
1821               *,$other,*) ;;
1822               *,all,*) ;;
1823               *)
1824                 case ,${enable_languages}, in
1825                   *,$language,*)
1826                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1827                     enable_stage1_languages="$enable_stage1_languages,${other}"
1828                     ;;
1829                 esac
1830                 ;;
1831             esac
1832           fi
1833         done
1834         ;;
1835     esac
1836   done
1837
1838   new_enable_languages=,c,
1839
1840   # If LTO is enabled, add the LTO front end.
1841   extra_host_libiberty_configure_flags=
1842   if test "$enable_lto" = "yes" ; then
1843     case ,${enable_languages}, in
1844       *,lto,*) ;;
1845       *) enable_languages="${enable_languages},lto" ;;
1846     esac
1847     if test "${build_lto_plugin}" = "yes" ; then
1848       configdirs="$configdirs lto-plugin"
1849       extra_host_libiberty_configure_flags=--enable-shared
1850     fi
1851   fi
1852   AC_SUBST(extra_host_libiberty_configure_flags)
1853
1854   missing_languages=`echo ",$enable_languages," | sed -e s/,all,/,/ -e s/,c,/,/ `
1855   potential_languages=,c,
1856
1857   enabled_target_libs=
1858   disabled_target_libs=
1859
1860   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1861     case ${lang_frag} in
1862       ..) ;;
1863       # The odd quoting in the next line works around
1864       # an apparent bug in bash 1.12 on linux.
1865       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1866       *)
1867         # From the config-lang.in, get $language, $target_libs,
1868         # $lang_dirs, $boot_language, and $build_by_default
1869         language=
1870         target_libs=
1871         lang_dirs=
1872         subdir_requires=
1873         boot_language=no
1874         build_by_default=yes
1875         . ${lang_frag}
1876         if test x${language} = x; then
1877           echo "${lang_frag} doesn't set \$language." 1>&2
1878           exit 1
1879         fi
1880
1881         if test "$language" = "c++"; then
1882           boot_language=yes
1883         fi
1884
1885         add_this_lang=no
1886         case ,${enable_languages}, in
1887           *,${language},*)
1888             # Language was explicitly selected; include it
1889             # unless it is C, which is enabled by default.
1890             if test "$language" != "c"; then
1891               add_this_lang=yes
1892             fi
1893             ;;
1894           *,all,*)
1895             # 'all' was selected, select it if it is a default language
1896             if test "$language" != "c"; then
1897               add_this_lang=${build_by_default}
1898             fi
1899             ;;
1900         esac
1901
1902         # Disable languages that need other directories if these aren't available.
1903         for i in $subdir_requires; do
1904           test -f "$srcdir/gcc/$i/config-lang.in" && continue
1905           case ,${enable_languages}, in
1906             *,${language},*)
1907               # Specifically requested language; tell them.
1908               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
1909               ;;
1910             *)
1911               # Silently disable.
1912               add_this_lang=unsupported
1913               ;;
1914           esac
1915         done
1916
1917         # Disable Ada if no preexisting GNAT is available.
1918         case ,${enable_languages},:${language}:${have_gnat} in
1919           *,${language},*:ada:no)
1920             # Specifically requested language; tell them.
1921             AC_MSG_ERROR([GNAT is required to build $language])
1922             ;;
1923           *:ada:no)
1924             # Silently disable.
1925             add_this_lang=unsupported
1926             ;;
1927         esac
1928
1929         # Disable a language that is unsupported by the target.
1930         case " $unsupported_languages " in
1931           *" $language "*)
1932             add_this_lang=unsupported
1933             ;;
1934         esac
1935
1936         case $add_this_lang in
1937           unsupported)
1938             # Remove language-dependent dirs.
1939             disabled_target_libs="$disabled_target_libs $target_libs"
1940             noconfigdirs="$noconfigdirs $lang_dirs"
1941             ;;
1942           no)
1943             # Remove language-dependent dirs; still show language as supported.
1944             disabled_target_libs="$disabled_target_libs $target_libs"
1945             noconfigdirs="$noconfigdirs $lang_dirs"
1946             potential_languages="${potential_languages}${language},"
1947             ;;
1948           yes)
1949             new_enable_languages="${new_enable_languages}${language},"
1950             potential_languages="${potential_languages}${language},"
1951             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
1952             enabled_target_libs="$enabled_target_libs $target_libs"
1953             case "${boot_language}:,$enable_stage1_languages," in
1954               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
1955                 # Add to (comma-separated) list of stage 1 languages.
1956                 case ",$stage1_languages," in
1957                   *,$language,* | ,yes, | ,all,) ;;
1958                   *) stage1_languages="${stage1_languages}${language}," ;;
1959                 esac
1960                 # We need to bootstrap any supporting libraries.
1961                 bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
1962                 ;;
1963             esac
1964             ;;
1965         esac
1966         ;;
1967     esac
1968   done
1969
1970   # Add target libraries which are only needed for disabled languages
1971   # to noconfigdirs.
1972   if test -n "$disabled_target_libs"; then
1973     for dir in $disabled_target_libs; do
1974       case " $enabled_target_libs " in
1975       *" ${dir} "*) ;;
1976       *) noconfigdirs="$noconfigdirs $dir" ;;
1977       esac
1978     done
1979   fi
1980
1981   AC_ARG_ENABLE(stage1-languages,
1982   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
1983                   [choose additional languages to build during
1984                   stage1.  Mostly useful for compiler development])],
1985   [case ,${enable_stage1_languages}, in
1986     ,no,|,,)
1987       # Set it to something that will have no effect in the loop below
1988       enable_stage1_languages=c ;;
1989     ,yes,)
1990       enable_stage1_languages=`echo $new_enable_languages | \
1991         sed -e "s/^,//" -e "s/,$//" ` ;;
1992     *,all,*)
1993       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
1994         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
1995   esac
1996
1997   # Add "good" languages from enable_stage1_languages to stage1_languages,
1998   # while "bad" languages go in missing_languages.  Leave no duplicates.
1999   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2000     case $potential_languages in
2001       *,$i,*)
2002         case $stage1_languages in
2003           *,$i,*) ;;
2004           *) stage1_languages="$stage1_languages$i," ;;
2005         esac ;;
2006       *)
2007         case $missing_languages in
2008           *,$i,*) ;;
2009           *) missing_languages="$missing_languages$i," ;;
2010         esac ;;
2011      esac
2012   done])
2013
2014   # Remove leading/trailing commas that were added for simplicity
2015   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2016   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2017   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2018   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2019
2020   if test "x$missing_languages" != x; then
2021     AC_MSG_ERROR([
2022 The following requested languages could not be built: ${missing_languages}
2023 Supported languages are: ${potential_languages}])
2024   fi
2025   if test "x$new_enable_languages" != "x$enable_languages"; then
2026     echo The following languages will be built: ${new_enable_languages}
2027     enable_languages="$new_enable_languages"
2028   fi
2029
2030   AC_SUBST(stage1_languages)
2031   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2032 fi
2033
2034 # Handle --disable-<component> generically.
2035 for dir in $configdirs $build_configdirs $target_configdirs ; do
2036   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2037   varname=`echo $dirname | sed -e s/+/_/g`
2038   if eval test x\${enable_${varname}} "=" xno ; then
2039     noconfigdirs="$noconfigdirs $dir"
2040   fi
2041 done
2042
2043 # Check for Boehm's garbage collector
2044 AC_ARG_ENABLE(objc-gc,
2045 [AS_HELP_STRING([--enable-objc-gc],
2046                 [enable use of Boehm's garbage collector with the
2047                  GNU Objective-C runtime])],
2048 [case ,${enable_languages},:${enable_objc_gc}:${noconfigdirs} in
2049   *,objc,*:*:yes:*target-boehm-gc*)
2050     AC_MSG_ERROR([Boehm's garbage collector was requested yet not supported in this configuration])
2051     ;;
2052 esac])
2053
2054 # Make sure we only build Boehm's garbage collector if required.
2055 case ,${enable_languages},:${enable_objc_gc} in
2056   *,objc,*:yes)
2057     # Keep target-boehm-gc if requested for Objective-C.
2058     ;;
2059   *)
2060     # Otherwise remove target-boehm-gc depending on target-libjava.
2061     if echo " ${noconfigdirs} " | grep "target-libjava" >/dev/null 2>&1; then
2062       noconfigdirs="$noconfigdirs target-boehm-gc"
2063     fi
2064     ;;
2065 esac
2066
2067 # Disable libitm, libsanitizer, libvtv if we're not building C++
2068 case ,${enable_languages}, in
2069   *,c++,*) ;;
2070   *)
2071     noconfigdirs="$noconfigdirs target-libcilkrts target-libitm target-libsanitizer target-libvtv"
2072     ;;
2073 esac
2074
2075 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2076 # $build_configdirs and $target_configdirs.
2077 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2078
2079 notsupp=""
2080 for dir in . $skipdirs $noconfigdirs ; do
2081   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2082   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2083     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2084     if test -r $srcdir/$dirname/configure ; then
2085       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2086         true
2087       else
2088         notsupp="$notsupp $dir"
2089       fi
2090     fi
2091   fi
2092   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2093     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2094     if test -r $srcdir/$dirname/configure ; then
2095       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2096         true
2097       else
2098         notsupp="$notsupp $dir"
2099       fi
2100     fi
2101   fi
2102   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2103     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2104     if test -r $srcdir/$dirname/configure ; then
2105       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2106         true
2107       else
2108         notsupp="$notsupp $dir"
2109       fi
2110     fi
2111   fi
2112 done
2113
2114 # Quietly strip out all directories which aren't configurable in this tree.
2115 # This relies on all configurable subdirectories being autoconfiscated, which
2116 # is now the case.
2117 build_configdirs_all="$build_configdirs"
2118 build_configdirs=
2119 for i in ${build_configdirs_all} ; do
2120   j=`echo $i | sed -e s/build-//g`
2121   if test -f ${srcdir}/$j/configure ; then
2122     build_configdirs="${build_configdirs} $i"
2123   fi
2124 done
2125
2126 configdirs_all="$configdirs"
2127 configdirs=
2128 for i in ${configdirs_all} ; do
2129   if test -f ${srcdir}/$i/configure ; then
2130     configdirs="${configdirs} $i"
2131   fi
2132 done
2133
2134 target_configdirs_all="$target_configdirs"
2135 target_configdirs=
2136 for i in ${target_configdirs_all} ; do
2137   j=`echo $i | sed -e s/target-//g`
2138   if test -f ${srcdir}/$j/configure ; then
2139     target_configdirs="${target_configdirs} $i"
2140   fi
2141 done
2142
2143 # Produce a warning message for the subdirs we can't configure.
2144 # This isn't especially interesting in the Cygnus tree, but in the individual
2145 # FSF releases, it's important to let people know when their machine isn't
2146 # supported by the one or two programs in a package.
2147
2148 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2149   # If $appdirs is non-empty, at least one of those directories must still
2150   # be configured, or we error out.  (E.g., if the gas release supports a
2151   # specified target in some subdirs but not the gas subdir, we shouldn't
2152   # pretend that all is well.)
2153   if test -n "$appdirs" ; then
2154     for dir in $appdirs ; do
2155       if test -r $dir/Makefile.in ; then
2156         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2157           appdirs=""
2158           break
2159         fi
2160         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2161           appdirs=""
2162           break
2163         fi
2164       fi
2165     done
2166     if test -n "$appdirs" ; then
2167       echo "*** This configuration is not supported by this package." 1>&2
2168       exit 1
2169     fi
2170   fi
2171   # Okay, some application will build, or we don't care to check.  Still
2172   # notify of subdirs not getting built.
2173   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2174   echo "    ${notsupp}" 1>&2
2175   echo "    (Any other directories should still work fine.)" 1>&2
2176 fi
2177
2178 case "$host" in
2179   *msdosdjgpp*)
2180     enable_gdbtk=no ;;
2181 esac
2182
2183 # To find our prefix, in gcc_cv_tool_prefix.
2184 ACX_TOOL_DIRS
2185
2186 copy_dirs=
2187
2188 AC_ARG_WITH([build-sysroot],
2189   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2190                   [use sysroot as the system root during the build])],
2191   [if test x"$withval" != x ; then
2192      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2193    fi],
2194   [SYSROOT_CFLAGS_FOR_TARGET=])
2195 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2196
2197 AC_ARG_WITH([debug-prefix-map],
2198   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2199                   [map A to B, C to D ... in debug information])],
2200   [if test x"$withval" != x; then
2201      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2202      for debug_map in $withval; do
2203        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2204      done
2205    fi],
2206   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2207 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2208
2209 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2210 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2211 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2212 # We want to ensure that TARGET libraries (which we know are built with
2213 # gcc) are built with "-O2 -g", so include those options when setting
2214 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2215 if test "x$CFLAGS_FOR_TARGET" = x; then
2216   CFLAGS_FOR_TARGET=$CFLAGS
2217   case " $CFLAGS " in
2218     *" -O2 "*) ;;
2219     *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2220   esac
2221   case " $CFLAGS " in
2222     *" -g "* | *" -g3 "*) ;;
2223     *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2224   esac
2225 fi
2226 AC_SUBST(CFLAGS_FOR_TARGET)
2227
2228 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2229   CXXFLAGS_FOR_TARGET=$CXXFLAGS
2230   case " $CXXFLAGS " in
2231     *" -O2 "*) ;;
2232     *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2233   esac
2234   case " $CXXFLAGS " in
2235     *" -g "* | *" -g3 "*) ;;
2236     *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2237   esac
2238 fi
2239 AC_SUBST(CXXFLAGS_FOR_TARGET)
2240
2241 AC_SUBST(LDFLAGS_FOR_TARGET)
2242
2243 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2244 # the named directory are copied to $(tooldir)/sys-include.
2245 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2246   if test x${is_cross_compiler} = xno ; then
2247     echo 1>&2 '***' --with-headers is only supported when cross compiling
2248     exit 1
2249   fi
2250   if test x"${with_headers}" != xyes ; then
2251     x=${gcc_cv_tool_prefix}
2252     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2253   fi
2254 fi
2255
2256 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2257 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2258 # are permitted.
2259 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2260   if test x${is_cross_compiler} = xno ; then
2261     echo 1>&2 '***' --with-libs is only supported when cross compiling
2262     exit 1
2263   fi
2264   if test x"${with_libs}" != xyes ; then
2265     # Copy the libraries in reverse order, so that files in the first named
2266     # library override files in subsequent libraries.
2267     x=${gcc_cv_tool_prefix}
2268     for l in ${with_libs}; do
2269       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2270     done
2271   fi
2272 fi
2273
2274 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2275 #
2276 # This is done by determining whether or not the appropriate directory
2277 # is available, and by checking whether or not specific configurations
2278 # have requested that this magic not happen.
2279 #
2280 # The command line options always override the explicit settings in
2281 # configure.in, and the settings in configure.in override this magic.
2282 #
2283 # If the default for a toolchain is to use GNU as and ld, and you don't
2284 # want to do that, then you should use the --without-gnu-as and
2285 # --without-gnu-ld options for the configure script.  Similarly, if
2286 # the default is to use the included zlib and you don't want to do that,
2287 # you should use the --with-system-zlib option for the configure script.
2288
2289 if test x${use_gnu_as} = x &&
2290    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2291   with_gnu_as=yes
2292   extra_host_args="$extra_host_args --with-gnu-as"
2293 fi
2294
2295 if test x${use_gnu_ld} = x &&
2296    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2297   with_gnu_ld=yes
2298   extra_host_args="$extra_host_args --with-gnu-ld"
2299 fi
2300
2301 if test x${use_included_zlib} = x &&
2302    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2303   :
2304 else
2305   with_system_zlib=yes
2306   extra_host_args="$extra_host_args --with-system-zlib"
2307 fi
2308
2309 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2310 # can detect this case.
2311
2312 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2313   with_newlib=yes
2314   extra_host_args="$extra_host_args --with-newlib"
2315 fi
2316
2317 # Handle ${copy_dirs}
2318 set fnord ${copy_dirs}
2319 shift
2320 while test $# != 0 ; do
2321   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2322     :
2323   else
2324     echo Copying $1 to $2
2325
2326     # Use the install script to create the directory and all required
2327     # parent directories.
2328     if test -d $2 ; then
2329       :
2330     else
2331       echo >config.temp
2332       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2333     fi
2334
2335     # Copy the directory, assuming we have tar.
2336     # FIXME: Should we use B in the second tar?  Not all systems support it.
2337     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2338
2339     # It is the responsibility of the user to correctly adjust all
2340     # symlinks.  If somebody can figure out how to handle them correctly
2341     # here, feel free to add the code.
2342
2343     echo $1 > $2/COPIED
2344   fi
2345   shift; shift
2346 done
2347
2348 # Determine a target-dependent exec_prefix that the installed
2349 # gcc will search in.  Keep this list sorted by triplet, with
2350 # the *-*-osname triplets last.
2351 md_exec_prefix=
2352 case "${target}" in
2353   i[[34567]]86-pc-msdosdjgpp*)
2354     md_exec_prefix=/dev/env/DJDIR/bin
2355     ;;
2356   *-*-hpux* | \
2357   *-*-nto-qnx* | \
2358   *-*-solaris2*)
2359     md_exec_prefix=/usr/ccs/bin
2360     ;;
2361 esac
2362
2363 extra_arflags_for_target=
2364 extra_nmflags_for_target=
2365 extra_ranlibflags_for_target=
2366 target_makefile_frag=/dev/null
2367 case "${target}" in
2368   spu-*-*)
2369     target_makefile_frag="config/mt-spu"
2370     ;;
2371   mips*-sde-elf* | mips*-mti-elf*)
2372     target_makefile_frag="config/mt-sde"
2373     ;;
2374   mipsisa*-*-elfoabi*)
2375     target_makefile_frag="config/mt-mips-elfoabi"
2376     ;;
2377   mips*-*-*linux* | mips*-*-gnu*)
2378     target_makefile_frag="config/mt-mips-gnu"
2379     ;;
2380   nios2-*-elf*)
2381     target_makefile_frag="config/mt-nios2-elf"
2382     ;;
2383   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2384     target_makefile_frag="config/mt-gnu"
2385     ;;
2386   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2387     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2388     # commands to handle both 32-bit and 64-bit objects.  These flags are
2389     # harmless if we're using GNU nm or ar.
2390     extra_arflags_for_target=" -X32_64"
2391     extra_nmflags_for_target=" -B -X32_64"
2392     ;;
2393 esac
2394
2395 alphaieee_frag=/dev/null
2396 case $target in
2397   alpha*-*-*)
2398     # This just makes sure to use the -mieee option to build target libs.
2399     # This should probably be set individually by each library.
2400     alphaieee_frag="config/mt-alphaieee"
2401     ;;
2402 esac
2403
2404 # If --enable-target-optspace always use -Os instead of -O2 to build
2405 # the target libraries, similarly if it is not specified, use -Os
2406 # on selected platforms.
2407 ospace_frag=/dev/null
2408 case "${enable_target_optspace}:${target}" in
2409   yes:*)
2410     ospace_frag="config/mt-ospace"
2411     ;;
2412   :d30v-*)
2413     ospace_frag="config/mt-d30v"
2414     ;;
2415   :m32r-* | :d10v-* | :fr30-*)
2416     ospace_frag="config/mt-ospace"
2417     ;;
2418   no:* | :*)
2419     ;;
2420   *)
2421     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2422     ;;
2423 esac
2424
2425 # Some systems (e.g., one of the i386-aix systems the gas testers are
2426 # using) don't handle "\$" correctly, so don't use it here.
2427 tooldir='${exec_prefix}'/${target_noncanonical}
2428 build_tooldir=${tooldir}
2429
2430 # Create a .gdbinit file which runs the one in srcdir
2431 # and tells GDB to look there for source files.
2432
2433 if test -r ${srcdir}/.gdbinit ; then
2434   case ${srcdir} in
2435     .) ;;
2436     *) cat > ./.gdbinit <<EOF
2437 # ${NO_EDIT}
2438 dir ${srcdir}
2439 dir .
2440 source ${srcdir}/.gdbinit
2441 EOF
2442     ;;
2443   esac
2444 fi
2445
2446 # Make sure that the compiler is able to generate an executable.  If it
2447 # can't, we are probably in trouble.  We don't care whether we can run the
2448 # executable--we might be using a cross compiler--we only care whether it
2449 # can be created.  At this point the main configure script has set CC.
2450 we_are_ok=no
2451 echo "int main () { return 0; }" > conftest.c
2452 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2453 if test $? = 0 ; then
2454   if test -s conftest || test -s conftest.exe ; then
2455     we_are_ok=yes
2456   fi
2457 fi
2458 case $we_are_ok in
2459   no)
2460     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2461     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2462     rm -f conftest*
2463     exit 1
2464     ;;
2465 esac
2466 rm -f conftest*
2467
2468 # Decide which environment variable is used to find dynamic libraries.
2469 case "${host}" in
2470   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2471   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2472   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2473   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2474 esac
2475
2476 # On systems where the dynamic library environment variable is PATH,
2477 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2478 # built executables to PATH.
2479 if test "$RPATH_ENVVAR" = PATH; then
2480   GCC_SHLIB_SUBDIR=/shlib
2481 else
2482   GCC_SHLIB_SUBDIR=
2483 fi
2484
2485 # Adjust the toplevel makefile according to whether bootstrap was selected.
2486 case $enable_bootstrap in
2487   yes)
2488     bootstrap_suffix=bootstrap
2489     BUILD_CONFIG=bootstrap-debug
2490     ;;
2491   no)
2492     bootstrap_suffix=no-bootstrap
2493     BUILD_CONFIG=
2494     ;;
2495 esac
2496
2497 AC_MSG_CHECKING(for default BUILD_CONFIG)
2498
2499 AC_ARG_WITH([build-config],
2500   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2501                   [use config/NAME.mk build configuration])],
2502   [case $with_build_config in
2503    yes) with_build_config= ;;
2504    no) with_build_config= BUILD_CONFIG= ;;
2505    esac])
2506
2507 if test "x${with_build_config}" != x; then
2508   BUILD_CONFIG=$with_build_config
2509 else
2510   case $BUILD_CONFIG in
2511   bootstrap-debug)
2512     if echo "int f (void) { return 0; }" > conftest.c &&
2513        ${CC} -c conftest.c &&
2514        mv conftest.o conftest.o.g0 &&
2515        ${CC} -c -g conftest.c &&
2516        mv conftest.o conftest.o.g &&
2517        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2518       :
2519     else
2520       BUILD_CONFIG=
2521     fi
2522     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2523     ;;
2524   esac
2525 fi
2526 AC_MSG_RESULT($BUILD_CONFIG)
2527 AC_SUBST(BUILD_CONFIG)
2528
2529 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2530 AC_MSG_CHECKING([for --enable-vtable-verify])
2531 AC_ARG_ENABLE(vtable-verify,
2532 [  --enable-vtable-verify    Enable vtable verification feature ],
2533 [case "$enableval" in
2534  yes) enable_vtable_verify=yes ;;
2535  no)  enable_vtable_verify=no ;;
2536  *)   enable_vtable_verify=no;;
2537  esac],
2538 [enable_vtable_verify=no])
2539 AC_MSG_RESULT($enable_vtable_verify)
2540
2541 # Record target_configdirs and the configure arguments for target and
2542 # build configuration in Makefile.
2543 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2544 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2545 bootstrap_fixincludes=no
2546
2547 # If we are building libgomp, bootstrap it.
2548 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2549   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2550 fi
2551
2552 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2553 # or bootstrap-ubsan, bootstrap it.
2554 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2555   case "$BUILD_CONFIG" in
2556     *bootstrap-asan* | *bootstrap-ubsan* )
2557       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2558       bootstrap_fixincludes=yes
2559       ;;
2560   esac
2561 fi
2562
2563 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2564 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2565    test "$enable_vtable_verify" != no; then
2566   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2567 fi
2568
2569 # Determine whether gdb needs tk/tcl or not.
2570 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2571 # and in that case we want gdb to be built without tk.  Ugh!
2572 # In fact I believe gdb is the *only* package directly dependent on tk,
2573 # so we should be able to put the 'maybe's in unconditionally and
2574 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2575 # 100% sure that that's safe though.
2576
2577 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2578 case "$enable_gdbtk" in
2579   no)
2580     GDB_TK="" ;;
2581   yes)
2582     GDB_TK="${gdb_tk}" ;;
2583   *)
2584     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2585     # distro.  Eventually someone will fix this and move Insight, nee
2586     # gdbtk to a separate directory.
2587     if test -d ${srcdir}/gdb/gdbtk ; then
2588       GDB_TK="${gdb_tk}"
2589     else
2590       GDB_TK=""
2591     fi
2592     ;;
2593 esac
2594 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2595 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2596
2597 # Strip out unwanted targets.
2598
2599 # While at that, we remove Makefiles if we were started for recursive
2600 # configuration, so that the top-level Makefile reconfigures them,
2601 # like we used to do when configure itself was recursive.
2602
2603 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2604 # but now we're fixing up the Makefile ourselves with the additional
2605 # commands passed to AC_CONFIG_FILES.  Use separate variables
2606 # extrasub-{build,host,target} not because there is any reason to split
2607 # the substitutions up that way, but only to remain below the limit of
2608 # 99 commands in a script, for HP-UX sed.
2609 # Do not nest @if/@endif pairs, because configure will not warn you at all.
2610
2611 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2612   yes:yes:*\ gold\ *:*,c++,*) ;;
2613   yes:yes:*\ gold\ *:*)
2614     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2615     ;;
2616 esac
2617
2618 extrasub_build=
2619 for module in ${build_configdirs} ; do
2620   if test -z "${no_recursion}" \
2621      && test -f ${build_subdir}/${module}/Makefile; then
2622     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2623     rm -f ${build_subdir}/${module}/Makefile
2624   fi
2625   extrasub_build="$extrasub_build
2626 /^@if build-$module\$/d
2627 /^@endif build-$module\$/d
2628 /^@if build-$module-$bootstrap_suffix\$/d
2629 /^@endif build-$module-$bootstrap_suffix\$/d"
2630 done
2631 extrasub_host=
2632 for module in ${configdirs} ; do
2633   if test -z "${no_recursion}"; then
2634     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2635       if test -f ${file}; then
2636         echo 1>&2 "*** removing ${file} to force reconfigure"
2637         rm -f ${file}
2638       fi
2639     done
2640   fi
2641   case ${module},${bootstrap_fixincludes} in
2642     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2643     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2644   esac
2645   extrasub_host="$extrasub_host
2646 /^@if $module\$/d
2647 /^@endif $module\$/d
2648 /^@if $module-$host_bootstrap_suffix\$/d
2649 /^@endif $module-$host_bootstrap_suffix\$/d"
2650 done
2651 extrasub_target=
2652 for module in ${target_configdirs} ; do
2653   if test -z "${no_recursion}" \
2654      && test -f ${target_subdir}/${module}/Makefile; then
2655     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2656     rm -f ${target_subdir}/${module}/Makefile
2657   fi
2658
2659   # We only bootstrap target libraries listed in bootstrap_target_libs.
2660   case $bootstrap_target_libs in
2661     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2662     *) target_bootstrap_suffix=no-bootstrap ;;
2663   esac
2664
2665   extrasub_target="$extrasub_target
2666 /^@if target-$module\$/d
2667 /^@endif target-$module\$/d
2668 /^@if target-$module-$target_bootstrap_suffix\$/d
2669 /^@endif target-$module-$target_bootstrap_suffix\$/d"
2670 done
2671
2672 # Do the final fixup along with target modules.
2673 extrasub_target="$extrasub_target
2674 /^@if /,/^@endif /d"
2675
2676 # Create the serialization dependencies.  This uses a temporary file.
2677
2678 AC_ARG_ENABLE([serial-configure],
2679 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
2680                 [force sequential configuration of
2681                  sub-packages for the host, target or build
2682                  machine, or all sub-packages])])
2683
2684 case ${enable_serial_configure} in
2685   yes)
2686     enable_serial_build_configure=yes
2687     enable_serial_host_configure=yes
2688     enable_serial_target_configure=yes
2689     ;;
2690 esac
2691
2692 # These force 'configure's to be done one at a time, to avoid problems
2693 # with contention over a shared config.cache.
2694 rm -f serdep.tmp
2695 echo '# serdep.tmp' > serdep.tmp
2696 olditem=
2697 test "x${enable_serial_build_configure}" = xyes &&
2698 for item in ${build_configdirs} ; do
2699   case ${olditem} in
2700     "") ;;
2701     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
2702   esac
2703   olditem=${item}
2704 done
2705 olditem=
2706 test "x${enable_serial_host_configure}" = xyes &&
2707 for item in ${configdirs} ; do
2708   case ${olditem} in
2709     "") ;;
2710     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
2711   esac
2712   olditem=${item}
2713 done
2714 olditem=
2715 test "x${enable_serial_target_configure}" = xyes &&
2716 for item in ${target_configdirs} ; do
2717   case ${olditem} in
2718     "") ;;
2719     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
2720   esac
2721   olditem=${item}
2722 done
2723 serialization_dependencies=serdep.tmp
2724 AC_SUBST_FILE(serialization_dependencies)
2725
2726 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
2727 # target, nonopt, and variable assignments.  These are the ones we
2728 # might not want to pass down to subconfigures.  The exception being
2729 # --cache-file=/dev/null, which is used to turn off the use of cache
2730 # files altogether, and which should be passed on to subconfigures.
2731 # Also strip program-prefix, program-suffix, and program-transform-name,
2732 # so that we can pass down a consistent program-transform-name.
2733 baseargs=
2734 tbaseargs=
2735 keep_next=no
2736 skip_next=no
2737 eval "set -- $ac_configure_args"
2738 for ac_arg
2739 do
2740   if test X"$skip_next" = X"yes"; then
2741     skip_next=no
2742     continue
2743   fi
2744   if test X"$keep_next" = X"yes"; then
2745     case $ac_arg in
2746       *\'*)
2747         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2748     esac
2749     baseargs="$baseargs '$ac_arg'"
2750     tbaseargs="$tbaseargs '$ac_arg'"
2751     keep_next=no
2752     continue
2753   fi
2754
2755   # Handle separated arguments.  Based on the logic generated by
2756   # autoconf 2.59.
2757   case $ac_arg in
2758     *=* | --config-cache | -C | -disable-* | --disable-* \
2759       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
2760       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
2761       | -with-* | --with-* | -without-* | --without-* | --x)
2762       separate_arg=no
2763       ;;
2764     -*)
2765       separate_arg=yes
2766       ;;
2767     *)
2768       separate_arg=no
2769       ;;
2770   esac
2771
2772   skip_targ=no
2773   case $ac_arg in
2774 changequote(,)
2775   --with-* | --without-*)
2776     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
2777
2778     case $libopt in
2779     *[-_]include)
2780       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
2781       ;;
2782     *[-_]lib)
2783       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
2784       ;;
2785     *)
2786       lib=$libopt
2787       ;;
2788     esac
2789 changequote([,])
2790
2791     case $lib in
2792     mpc | mpfr | gmp | cloog)
2793       # If we're processing --with-$lib, --with-$lib-include or
2794       # --with-$lib-lib, for one of the libs above, and target is
2795       # different from host, don't pass the current argument to any
2796       # target library's configure.
2797       if test x$is_cross_compiler = xyes; then
2798         skip_targ=yes
2799       fi
2800       ;;
2801     esac
2802     ;;
2803   esac
2804
2805   case "$ac_arg" in
2806     --cache-file=/dev/null | \
2807     -cache-file=/dev/null )
2808       # Handled here to avoid the test to skip args below.
2809       baseargs="$baseargs '$ac_arg'"
2810       tbaseargs="$tbaseargs '$ac_arg'"
2811       # Assert: $separate_arg should always be no.
2812       keep_next=$separate_arg
2813       ;;
2814     --no*)
2815       continue
2816       ;;
2817     --c* | \
2818     --sr* | \
2819     --ho* | \
2820     --bu* | \
2821     --t* | \
2822     --program-* | \
2823     -cache_file* | \
2824     -srcdir* | \
2825     -host* | \
2826     -build* | \
2827     -target* | \
2828     -program-prefix* | \
2829     -program-suffix* | \
2830     -program-transform-name* )
2831       skip_next=$separate_arg
2832       continue
2833       ;;
2834     -*)
2835       # An option.  Add it.
2836       case $ac_arg in
2837         *\'*)
2838           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2839       esac
2840       baseargs="$baseargs '$ac_arg'"
2841       if test X"$skip_targ" = Xno; then
2842         tbaseargs="$tbaseargs '$ac_arg'"
2843       fi
2844       keep_next=$separate_arg
2845       ;;
2846     *)
2847       # Either a variable assignment, or a nonopt (triplet).  Don't
2848       # pass it down; let the Makefile handle this.
2849       continue
2850       ;;
2851   esac
2852 done
2853 # Remove the initial space we just introduced and, as these will be
2854 # expanded by make, quote '$'.
2855 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
2856
2857 # Add in --program-transform-name, after --program-prefix and
2858 # --program-suffix have been applied to it.  Autoconf has already
2859 # doubled dollar signs and backslashes in program_transform_name; we want
2860 # the backslashes un-doubled, and then the entire thing wrapped in single
2861 # quotes, because this will be expanded first by make and then by the shell.
2862 # Also, because we want to override the logic in subdir configure scripts to
2863 # choose program_transform_name, replace any s,x,x, with s,y,y,.
2864 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
2865 ${program_transform_name}
2866 EOF_SED
2867 gcc_transform_name=`cat conftestsed.out`
2868 rm -f conftestsed.out
2869 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
2870 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
2871 if test "$silent" = yes; then
2872   baseargs="$baseargs --silent"
2873   tbaseargs="$tbaseargs --silent"
2874 fi
2875 baseargs="$baseargs --disable-option-checking"
2876 tbaseargs="$tbaseargs --disable-option-checking"
2877
2878 # Record and document user additions to sub configure arguments.
2879 AC_ARG_VAR([build_configargs],
2880            [additional configure arguments for build directories])
2881 AC_ARG_VAR([host_configargs],
2882            [additional configure arguments for host directories])
2883 AC_ARG_VAR([target_configargs],
2884            [additional configure arguments for target directories])
2885
2886 # For the build-side libraries, we just need to pretend we're native,
2887 # and not use the same cache file.  Multilibs are neither needed nor
2888 # desired.
2889 build_configargs="$build_configargs --cache-file=../config.cache ${baseargs}"
2890
2891 # For host modules, accept cache file option, or specification as blank.
2892 case "${cache_file}" in
2893 "") # empty
2894   cache_file_option="" ;;
2895 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
2896   cache_file_option="--cache-file=${cache_file}" ;;
2897 *) # relative path
2898   cache_file_option="--cache-file=../${cache_file}" ;;
2899 esac
2900
2901 # Host dirs don't like to share a cache file either, horribly enough.
2902 # This seems to be due to autoconf 2.5x stupidity.
2903 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
2904
2905 target_configargs="$target_configargs ${tbaseargs}"
2906
2907 # Passing a --with-cross-host argument lets the target libraries know
2908 # whether they are being built with a cross-compiler or being built
2909 # native.  However, it would be better to use other mechanisms to make the
2910 # sorts of decisions they want to make on this basis.  Please consider
2911 # this option to be deprecated.  FIXME.
2912 if test x${is_cross_compiler} = xyes ; then
2913   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
2914 fi
2915
2916 # Special user-friendly check for native x86_64-linux build, if
2917 # multilib is not explicitly enabled.
2918 case "$target:$have_compiler:$host:$target:$enable_multilib" in
2919   x86_64-*linux*:yes:$build:$build:)
2920     # Make sure we have a developement environment that handles 32-bit
2921     dev64=no
2922     echo "int main () { return 0; }" > conftest.c
2923     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2924     if test $? = 0 ; then
2925       if test -s conftest || test -s conftest.exe ; then
2926         dev64=yes
2927       fi
2928     fi
2929     rm -f conftest*
2930     if test x${dev64} != xyes ; then
2931       AC_MSG_ERROR([I suspect your system does not have 32-bit developement 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.])
2932     fi
2933     ;;
2934 esac
2935
2936 # Default to --enable-multilib.
2937 if test x${enable_multilib} = x ; then
2938   target_configargs="--enable-multilib ${target_configargs}"
2939 fi
2940
2941 # Pass --with-newlib if appropriate.  Note that target_configdirs has
2942 # changed from the earlier setting of with_newlib.
2943 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
2944   target_configargs="--with-newlib ${target_configargs}"
2945 fi
2946
2947 # Different target subdirs use different values of certain variables
2948 # (notably CXX).  Worse, multilibs use *lots* of different values.
2949 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
2950 # it doesn't automatically accept command-line overrides of them.
2951 # This means it's not safe for target subdirs to share a cache file,
2952 # which is disgusting, but there you have it.  Hopefully this can be
2953 # fixed in future.  It's still worthwhile to use a cache file for each
2954 # directory.  I think.
2955
2956 # Pass the appropriate --build, --host, --target and --cache-file arguments.
2957 # We need to pass --target, as newer autoconf's requires consistency
2958 # for target_alias and gcc doesn't manage it consistently.
2959 target_configargs="--cache-file=./config.cache ${target_configargs}"
2960
2961 FLAGS_FOR_TARGET=
2962 case " $target_configdirs " in
2963  *" newlib "*)
2964   case " $target_configargs " in
2965   *" --with-newlib "*)
2966    case "$target" in
2967     *-cygwin*)
2968       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
2969       ;;
2970    esac
2971
2972    # If we're not building GCC, don't discard standard headers.
2973    if test -d ${srcdir}/gcc; then
2974      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
2975
2976      if test "${build}" != "${host}"; then
2977        # On Canadian crosses, CC_FOR_TARGET will have already been set
2978        # by `configure', so we won't have an opportunity to add -Bgcc/
2979        # to it.  This is right: we don't want to search that directory
2980        # for binaries, but we want the header files in there, so add
2981        # them explicitly.
2982        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
2983
2984        # Someone might think of using the pre-installed headers on
2985        # Canadian crosses, in case the installed compiler is not fully
2986        # compatible with the compiler being built.  In this case, it
2987        # would be better to flag an error than risking having
2988        # incompatible object files being constructed.  We can't
2989        # guarantee that an error will be flagged, but let's hope the
2990        # compiler will do it, when presented with incompatible header
2991        # files.
2992      fi
2993    fi
2994
2995    case "${target}-${is_cross_compiler}" in
2996    i[[3456789]]86-*-linux*-no)
2997       # Here host == target, so we don't need to build gcc,
2998       # so we don't want to discard standard headers.
2999       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3000       ;;
3001    *)
3002       # If we're building newlib, use its generic headers last, but search
3003       # for any libc-related directories first (so make it the last -B
3004       # switch).
3005       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3006
3007       # If we're building libgloss, find the startup file, simulator library
3008       # and linker script.
3009       case " $target_configdirs " in
3010         *" libgloss "*)
3011         # Look for startup file, simulator library and maybe linker script.
3012         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3013         # Look for libnosys.a in case the target needs it.
3014         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3015         # Most targets have the linker script in the source directory.
3016         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3017         ;;
3018       esac
3019       ;;
3020    esac
3021    ;;
3022   esac
3023   ;;
3024 esac
3025
3026 case "$target" in
3027   x86_64-*mingw* | *-w64-mingw*)
3028   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3029   # however, use a symlink named 'mingw' in ${prefix} .
3030     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3031     ;;
3032   *-mingw*)
3033   # MinGW can't be handled as Cygwin above since it does not use newlib.
3034     FLAGS_FOR_TARGET=$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'
3035     ;;
3036 esac
3037
3038 # Allow the user to override the flags for
3039 # our build compiler if desired.
3040 if test x"${build}" = x"${host}" ; then
3041   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3042   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3043   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3044 fi
3045
3046 # On Canadian crosses, we'll be searching the right directories for
3047 # the previously-installed cross compiler, so don't bother to add
3048 # flags for directories within the install tree of the compiler
3049 # being built; programs in there won't even run.
3050 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3051   # Search for pre-installed headers if nothing else fits.
3052   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3053 fi
3054
3055 if test "x${use_gnu_ld}" = x &&
3056    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3057   # Arrange for us to find uninstalled linker scripts.
3058   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3059 fi
3060
3061 # Search for other target-specific linker scripts and such.
3062 case "${target}" in
3063   mep*)
3064     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3065     ;;
3066 esac
3067
3068 # Makefile fragments.
3069 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3070 do
3071   eval fragval=\$$frag
3072   if test $fragval != /dev/null; then
3073     eval $frag=${srcdir}/$fragval
3074   fi
3075 done
3076 AC_SUBST_FILE(host_makefile_frag)
3077 AC_SUBST_FILE(target_makefile_frag)
3078 AC_SUBST_FILE(alphaieee_frag)
3079 AC_SUBST_FILE(ospace_frag)
3080
3081 # Miscellanea: directories, flags, etc.
3082 AC_SUBST(RPATH_ENVVAR)
3083 AC_SUBST(GCC_SHLIB_SUBDIR)
3084 AC_SUBST(tooldir)
3085 AC_SUBST(build_tooldir)
3086 AC_SUBST(CONFIGURE_GDB_TK)
3087 AC_SUBST(GDB_TK)
3088 AC_SUBST(INSTALL_GDB_TK)
3089
3090 # Build module lists & subconfigure args.
3091 AC_SUBST(build_configargs)
3092 AC_SUBST(build_configdirs)
3093
3094 # Host module lists & subconfigure args.
3095 AC_SUBST(host_configargs)
3096 AC_SUBST(configdirs)
3097 AC_SUBST(target_configdirs)
3098
3099 # Target module lists & subconfigure args.
3100 AC_SUBST(target_configargs)
3101
3102
3103 # Build tools.
3104 AC_SUBST(AR_FOR_BUILD)
3105 AC_SUBST(AS_FOR_BUILD)
3106 AC_SUBST(CC_FOR_BUILD)
3107 AC_SUBST(CFLAGS_FOR_BUILD)
3108 AC_SUBST(CXXFLAGS_FOR_BUILD)
3109 AC_SUBST(CXX_FOR_BUILD)
3110 AC_SUBST(DLLTOOL_FOR_BUILD)
3111 AC_SUBST(GCJ_FOR_BUILD)
3112 AC_SUBST(GFORTRAN_FOR_BUILD)
3113 AC_SUBST(GOC_FOR_BUILD)
3114 AC_SUBST(LDFLAGS_FOR_BUILD)
3115 AC_SUBST(LD_FOR_BUILD)
3116 AC_SUBST(NM_FOR_BUILD)
3117 AC_SUBST(RANLIB_FOR_BUILD)
3118 AC_SUBST(WINDMC_FOR_BUILD)
3119 AC_SUBST(WINDRES_FOR_BUILD)
3120
3121 # Generate default definitions for YACC, M4, LEX and other programs that run
3122 # on the build machine.  These are used if the Makefile can't locate these
3123 # programs in objdir.
3124 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3125
3126 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3127 case " $build_configdirs " in
3128   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3129 esac
3130
3131 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3132 case " $build_configdirs " in
3133   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3134 esac
3135
3136 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3137 case " $build_configdirs " in
3138   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3139 esac
3140
3141 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3142 case " $build_configdirs " in
3143   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3144   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3145 esac
3146
3147 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3148 case " $build_configdirs " in
3149   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3150 esac
3151
3152 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3153 case " $build_configdirs " in
3154   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3155   *)
3156 changequote(,)
3157     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3158     # higher, else we use the "missing" dummy.
3159     if ${MAKEINFO} --version \
3160        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3161       :
3162     else
3163       MAKEINFO="$MISSING makeinfo"
3164     fi
3165     ;;
3166 changequote([,])
3167 esac
3168
3169 # FIXME: expect and dejagnu may become build tools?
3170
3171 AC_CHECK_PROGS(EXPECT, expect, expect)
3172 case " $configdirs " in
3173   *" expect "*)
3174     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3175     ;;
3176 esac
3177
3178 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3179 case " $configdirs " in
3180   *" dejagnu "*)
3181     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3182     ;;
3183 esac
3184
3185
3186 # Host tools.
3187 NCN_STRICT_CHECK_TOOLS(AR, ar)
3188 NCN_STRICT_CHECK_TOOLS(AS, as)
3189 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3190 NCN_STRICT_CHECK_TOOLS(LD, ld)
3191 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3192 NCN_STRICT_CHECK_TOOLS(NM, nm)
3193 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3194 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3195 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3196 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3197 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3198 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3199 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3200 AC_SUBST(CC)
3201 AC_SUBST(CXX)
3202 AC_SUBST(CFLAGS)
3203 AC_SUBST(CXXFLAGS)
3204
3205 # Target tools.
3206 AC_ARG_WITH([build-time-tools],
3207   [AS_HELP_STRING([--with-build-time-tools=PATH],
3208                   [use given path to find target tools during the build])],
3209   [case x"$withval" in
3210      x/*) ;;
3211      *)
3212        with_build_time_tools=
3213        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3214        ;;
3215    esac],
3216   [with_build_time_tools=])
3217
3218 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3219 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3220 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3221 NCN_STRICT_CHECK_TARGET_TOOLS(GCJ_FOR_TARGET, gcj)
3222 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3223 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3224
3225 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3226 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3227 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3228 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3229 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3230 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3231 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3232 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3233 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3234 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3235 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3236 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3237
3238 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3239
3240 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3241 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3242 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3243 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3244 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3245                 [gcc/xg++ -B$$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$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3246                 c++)
3247 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3248                 [gcc/xgcc -shared-libgcc -B$$r/$(HOST_SUBDIR)/gcc -nostdinc++ -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3249                 c++)
3250 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3251 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3252 GCC_TARGET_TOOL(gcj, GCJ_FOR_TARGET, GCJ,
3253                 [gcc/gcj -B$$r/$(HOST_SUBDIR)/gcc/], java)
3254 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3255                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3256 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3257                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3258 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3259 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3260 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3261 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3262 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3263 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3264 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3265 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3266 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3267
3268 AC_SUBST(FLAGS_FOR_TARGET)
3269 AC_SUBST(RAW_CXX_FOR_TARGET)
3270
3271 # Certain tools may need extra flags.
3272 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3273 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3274 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3275
3276 # When building target libraries, except in a Canadian cross, we use
3277 # the same toolchain as the compiler we just built.
3278 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3279 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3280 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3281 if test $host = $build; then
3282   case " $configdirs " in
3283     *" gcc "*)
3284       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3285       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3286       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3287       ;;
3288   esac
3289 fi
3290
3291 AC_SUBST(COMPILER_AS_FOR_TARGET)
3292 AC_SUBST(COMPILER_LD_FOR_TARGET)
3293 AC_SUBST(COMPILER_NM_FOR_TARGET)
3294
3295 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3296 AC_ARG_ENABLE(maintainer-mode,
3297 [AS_HELP_STRING([--enable-maintainer-mode],
3298                 [enable make rules and dependencies not useful
3299                  (and sometimes confusing) to the casual installer])],
3300       USE_MAINTAINER_MODE=$enableval,
3301       USE_MAINTAINER_MODE=no)
3302 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3303 AC_SUBST(MAINTAINER_MODE_TRUE)
3304 AC_SUBST(MAINTAINER_MODE_FALSE)
3305 if test "$USE_MAINTAINER_MODE" = yes; then
3306   MAINTAINER_MODE_TRUE=
3307   MAINTAINER_MODE_FALSE='#'
3308 else
3309   MAINTAINER_MODE_TRUE='#'
3310   MAINTAINER_MODE_FALSE=
3311 fi
3312 MAINT=$MAINTAINER_MODE_TRUE
3313 AC_SUBST(MAINT)dnl
3314
3315 # ---------------------
3316 # GCC bootstrap support
3317 # ---------------------
3318
3319 # Stage specific cflags for build.
3320 stage1_cflags="-g"
3321 case $build in
3322   vax-*-*)
3323     case ${GCC} in
3324       yes) stage1_cflags="-g -Wa,-J" ;;
3325       *) stage1_cflags="-g -J" ;;
3326     esac ;;
3327 esac
3328
3329 AC_SUBST(stage1_cflags)
3330
3331 # Enable --enable-checking in stage1 of the compiler.
3332 AC_ARG_ENABLE(stage1-checking,
3333 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3334                 [choose additional checking for stage1 of the compiler])],
3335 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3336 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3337   stage1_checking=--enable-checking=yes,types
3338 else
3339   stage1_checking=--enable-checking=$enable_checking,types
3340 fi])
3341 AC_SUBST(stage1_checking)
3342
3343 # Enable -Werror in bootstrap stage2 and later.
3344 AC_ARG_ENABLE(werror,
3345 [AS_HELP_STRING([--enable-werror],
3346                 [enable -Werror in bootstrap stage2 and later])], [],
3347 [if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3348   enable_werror=yes
3349 else
3350   enable_werror=no
3351 fi])
3352 case ${enable_werror} in
3353   yes) stage2_werror_flag="--enable-werror-always" ;;
3354   *) stage2_werror_flag="" ;;
3355 esac
3356 AC_SUBST(stage2_werror_flag)
3357
3358 # Enable --enable-host-shared.
3359 AC_ARG_ENABLE(host-shared,
3360 [AS_HELP_STRING([--enable-host-shared],
3361                 [build host code as shared libraries])],
3362 [host_shared=$enableval], [host_shared=no])
3363 AC_SUBST(host_shared)
3364
3365 # Specify what files to not compare during bootstrap.
3366
3367 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3368 case "$target" in
3369   hppa*64*-*-hpux*) ;;
3370   hppa*-*-hpux*) compare_exclusions="gcc/cc*-checksum\$(objext) | */libgcc/lib2funcs* | gcc/ada/*tools/*" ;;
3371   powerpc*-ibm-aix*) compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/* | *libgomp*\$(objext)" ;;
3372 esac
3373 AC_SUBST(compare_exclusions)
3374
3375 AC_CONFIG_FILES([Makefile],
3376   [sed "$extrasub_build" Makefile |
3377    sed "$extrasub_host" |
3378    sed "$extrasub_target" > mf$$
3379    mv -f mf$$ Makefile],
3380   [extrasub_build="$extrasub_build"
3381    extrasub_host="$extrasub_host"
3382    extrasub_target="$extrasub_target"])
3383 AC_OUTPUT