configure.ac

  xtensa*-*-elf*)
    ;;

  *-*-beos* | \
  *-*-elf* | \
  *-*-hpux* | \
  *-*-netware* | \
  *-*-nto-qnx* | \
  *-*-rtems* | \
  *-*-solaris2* | \
  *-*-sysv[[45]]* | \
  *-*-vxworks* | \
  *-wrs-windiss)
    md_exec_prefix=/usr/ccs/bin
    ;;
esac

extra_arflags_for_target=
extra_nmflags_for_target=
extra_ranlibflags_for_target=
target_makefile_frag=/dev/null
case "${target}" in
  mep*-*-*)
    target_makefile_frag="config/mt-mep"
    ;;
  spu-*-*)
    target_makefile_frag="config/mt-spu"
    ;;
  mips*-sde-elf*)
    target_makefile_frag="config/mt-sde"
    ;;
  mipsisa*-*-elfoabi*)
    target_makefile_frag="config/mt-mips-elfoabi"
    ;;
  mips*-*-*linux* | mips*-*-gnu*)
    target_makefile_frag="config/mt-mips-gnu"
    ;;
  *-*-netware*)
    target_makefile_frag="config/mt-netware"
    ;;
  *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
    target_makefile_frag="config/mt-gnu"
    ;;
  *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
    # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm 
    # commands to handle both 32-bit and 64-bit objects.  These flags are
    # harmless if we're using GNU nm or ar.
    extra_arflags_for_target=" -X32_64"
    extra_nmflags_for_target=" -B -X32_64"
    ;;
  *-*-darwin*)
    # ranlib from Darwin requires the -c flag to look at common symbols.
    extra_ranlibflags_for_target=" -c"
    ;;
  mips*-*-pe | sh*-*-pe | *arm-wince-pe)
    target_makefile_frag="config/mt-wince"
    ;;
esac

alphaieee_frag=/dev/null
case $target in
  alpha*-*-*)
    # This just makes sure to use the -mieee option to build target libs.
    # This should probably be set individually by each library.
    alphaieee_frag="config/mt-alphaieee"
    ;;
esac

# If --enable-target-optspace always use -Os instead of -O2 to build
# the target libraries, similarly if it is not specified, use -Os
# on selected platforms.
ospace_frag=/dev/null
case "${enable_target_optspace}:${target}" in
  yes:*)
    ospace_frag="config/mt-ospace"
    ;;
  :d30v-*)
    ospace_frag="config/mt-d30v"
    ;;
  :m32r-* | :d10v-* | :fr30-*)
    ospace_frag="config/mt-ospace"
    ;;
  no:* | :*)
    ;;
  *)
    echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
    ;;
esac

# Default to using --with-stabs for certain targets.
if test x${with_stabs} = x ; then
  case "${target}" in
  mips*-*-irix[[56]]*)
    ;;
  mips*-*-* | alpha*-*-osf*)
    with_stabs=yes;
    extra_host_args="${extra_host_args} --with-stabs"
    ;;
  esac
fi

# hpux11 in 64bit mode has libraries in a weird place.  Arrange to find
# them automatically.
case "${host}" in
  hppa*64*-*-hpux11*)	
    extra_host_args="$extra_host_args -x-libraries=/usr/lib/pa20_64 -x-includes=/usr/X11R6/include"
    ;;
esac

# Some systems (e.g., one of the i386-aix systems the gas testers are
# using) don't handle "\$" correctly, so don't use it here.
tooldir='${exec_prefix}'/${target_noncanonical}
build_tooldir=${tooldir}

# Create a .gdbinit file which runs the one in srcdir
# and tells GDB to look there for source files.

if test -r ${srcdir}/.gdbinit ; then
  case ${srcdir} in
    .) ;;
    *) cat > ./.gdbinit <<EOF
# ${NO_EDIT}
dir ${srcdir}
dir .
source ${srcdir}/.gdbinit
EOF
    ;;
  esac
fi

# Make sure that the compiler is able to generate an executable.  If it
# can't, we are probably in trouble.  We don't care whether we can run the
# executable--we might be using a cross compiler--we only care whether it
# can be created.  At this point the main configure script has set CC.
we_are_ok=no
echo "int main () { return 0; }" > conftest.c
${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
if test $? = 0 ; then
  if test -s conftest || test -s conftest.exe ; then
    we_are_ok=yes
  fi
fi 
case $we_are_ok in
  no)
    echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
    echo 1>&2 "*** You must set the environment variable CC to a working compiler."
    rm -f conftest*
    exit 1
    ;;
esac
rm -f conftest*

# The Solaris /usr/ucb/cc compiler does not appear to work.
case "${host}" in
  sparc-sun-solaris2*)
      CCBASE="`echo ${CC-cc} | sed 's/ .*$//'`"
      if test "`type $CCBASE | sed 's/^[[^/]]*//'`" = "/usr/ucb/cc" ; then
          could_use=
          test -d /opt/SUNWspro/bin && could_use="/opt/SUNWspro/bin"
          if test -d /opt/cygnus/bin ; then
              if test "$could_use" = "" ; then
                  could_use="/opt/cygnus/bin"
              else
                  could_use="$could_use or /opt/cygnus/bin"
              fi
          fi
        if test "$could_use" = "" ; then
            echo "Warning: compilation may fail because you're using"
            echo "/usr/ucb/cc.  You should change your PATH or CC "
            echo "variable and rerun configure."
        else
            echo "Warning: compilation may fail because you're using"
            echo "/usr/ucb/cc, when you should use the C compiler from"
            echo "$could_use.  You should change your"
            echo "PATH or CC variable and rerun configure."
        fi
      fi
  ;;
esac

# Decide which environment variable is used to find dynamic libraries.
case "${host}" in
  *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
  *-*-darwin* | *-*-rhapsody* ) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
  *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
  *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
esac

# On systems where the dynamic library environment variable is PATH,
# gcc/ will put dynamic libraries into a subdirectory to avoid adding
# built executables to PATH.
if test "$RPATH_ENVVAR" = PATH; then
  GCC_SHLIB_SUBDIR=/shlib
else
  GCC_SHLIB_SUBDIR=
fi

# Record target_configdirs and the configure arguments for target and
# build configuration in Makefile.
target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`

# Determine whether gdb needs tk/tcl or not.
# Use 'maybe' since enable_gdbtk might be true even if tk isn't available
# and in that case we want gdb to be built without tk.  Ugh!
# In fact I believe gdb is the *only* package directly dependent on tk,
# so we should be able to put the 'maybe's in unconditionally and
# leave out the maybe dependencies when enable_gdbtk is false.  I'm not
# 100% sure that that's safe though.

gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
case "$enable_gdbtk" in
  no)
    GDB_TK="" ;;
  yes)
    GDB_TK="${gdb_tk}" ;;
  *)
    # Only add the dependency on gdbtk when GDBtk is part of the gdb
    # distro.  Eventually someone will fix this and move Insight, nee
    # gdbtk to a separate directory.
    if test -d ${srcdir}/gdb/gdbtk ; then
      GDB_TK="${gdb_tk}"
    else
      GDB_TK=""
    fi
    ;;
esac
CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`

# Strip out unwanted targets.

# While at that, we remove Makefiles if we were started for recursive
# configuration, so that the top-level Makefile reconfigures them,
# like we used to do when configure itself was recursive.

# Loop over modules.  $extrasub must be used with care, limiting as
# much as possible the usage of range addresses.  That's because autoconf
# splits the sed script to overcome limits in the number of commands,
# and relying on carefully-timed sed passes may turn out to be very hard
# to maintain later.  In this particular case, you just have to be careful
# not to nest @if/@endif pairs, because configure will not warn you at all.

AC_ARG_ENABLE([bootstrap],
[  --enable-bootstrap      enable bootstrapping @<:@yes if native build@:>@],,
enable_bootstrap=default)

# Issue errors and warnings for invalid/strange bootstrap combinations.
case "$configdirs" in
  *gcc*) have_compiler=yes ;;
  *) have_compiler=no ;;
esac

case "$have_compiler:$host:$target:$enable_bootstrap" in
  *:*:*:no) ;;

  # Default behavior.  Enable bootstrap if we have a compiler
  # and we are in a native configuration.
  yes:$build:$build:default)
    enable_bootstrap=yes ;;

  *:*:*:default)
    enable_bootstrap=no ;;

  # We have a compiler and we are in a native configuration, bootstrap is ok
  yes:$build:$build:yes)
    ;;

  # Other configurations, but we have a compiler.  Assume the user knows
  # what he's doing.
  yes:*:*:yes)
    AC_MSG_WARN([trying to bootstrap a cross compiler])
    ;;

  # No compiler: if they passed --enable-bootstrap explicitly, fail
  no:*:*:yes)
    AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;

  # Fail if wrong command line
  *)
    AC_MSG_ERROR([invalid option for --enable-bootstrap])
    ;;
esac

# Adjust the toplevel makefile according to whether bootstrap was selected.
case "$enable_bootstrap" in
  yes)
    bootstrap_suffix=bootstrap ;;
  no)
    bootstrap_suffix=no-bootstrap ;;
esac

for module in ${build_configdirs} ; do
  if test -z "${no_recursion}" \
     && test -f ${build_subdir}/${module}/Makefile; then
    echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
    rm -f ${build_subdir}/${module}/Makefile
  fi
  extrasub="$extrasub
/^@if build-$module\$/d
/^@endif build-$module\$/d
/^@if build-$module-$bootstrap_suffix\$/d
/^@endif build-$module-$bootstrap_suffix\$/d"
done
for module in ${configdirs} ; do
  if test -z "${no_recursion}"; then
    for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
      if test -f ${file}; then
	echo 1>&2 "*** removing ${file} to force reconfigure"
	rm -f ${file}
      fi
    done
  fi
  extrasub="$extrasub
/^@if $module\$/d
/^@endif $module\$/d
/^@if $module-$bootstrap_suffix\$/d
/^@endif $module-$bootstrap_suffix\$/d"
done
for module in ${target_configdirs} ; do
  if test -z "${no_recursion}" \
     && test -f ${target_subdir}/${module}/Makefile; then
    echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
    rm -f ${target_subdir}/${module}/Makefile
  fi
  extrasub="$extrasub
/^@if target-$module\$/d
/^@endif target-$module\$/d
/^@if target-$module-$bootstrap_suffix\$/d
/^@endif target-$module-$bootstrap_suffix\$/d"
done

extrasub="$extrasub
/^@if /,/^@endif /d"

# Create the serialization dependencies.  This uses a temporary file.

AC_ARG_ENABLE([serial-configure],
[  --enable-serial-@<:@{host,target,build}-@:>@configure
                          force sequential configuration of
                          sub-packages for the host, target or build
                          machine, or all sub-packages])

case ${enable_serial_configure} in
  yes)
    enable_serial_build_configure=yes
    enable_serial_host_configure=yes
    enable_serial_target_configure=yes
    ;;
esac

# These force 'configure's to be done one at a time, to avoid problems
# with contention over a shared config.cache.
rm -f serdep.tmp
echo '# serdep.tmp' > serdep.tmp
olditem=
test "x${enable_serial_build_configure}" = xyes &&
for item in ${build_configdirs} ; do
  case ${olditem} in
    "") ;;
    *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
  esac
  olditem=${item}
done
olditem=
test "x${enable_serial_host_configure}" = xyes &&
for item in ${configdirs} ; do
  case ${olditem} in
    "") ;;
    *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
  esac
  olditem=${item}
done
olditem=
test "x${enable_serial_target_configure}" = xyes &&
for item in ${target_configdirs} ; do
  case ${olditem} in
    "") ;;
    *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
  esac
  olditem=${item}
done
serialization_dependencies=serdep.tmp
AC_SUBST_FILE(serialization_dependencies)

# Base args.  Strip norecursion, cache-file, srcdir, host, build,
# target, nonopt, and variable assignments.  These are the ones we
# might not want to pass down to subconfigures.  Also strip
# program-prefix, program-suffix, and program-transform-name, so that
# we can pass down a consistent program-transform-name.
baseargs=
keep_next=no
skip_next=no
eval "set -- $ac_configure_args"
for ac_arg
do
  if test X"$skip_next" = X"yes"; then
    skip_next=no
    continue
  fi
  if test X"$keep_next" = X"yes"; then
    case $ac_arg in
      *\'*)
	ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
    esac
    baseargs="$baseargs '$ac_arg'"
    keep_next=no
    continue
  fi

  # Handle separated arguments.  Based on the logic generated by
  # autoconf 2.59.
  case $ac_arg in
    *=* | --config-cache | -C | -disable-* | --disable-* \
      | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
      | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
      | -with-* | --with-* | -without-* | --without-* | --x)
      separate_arg=no
      ;;
    -*)
      separate_arg=yes
      ;;
    *)
      separate_arg=no
      ;;
  esac

  case "$ac_arg" in
    --no*)
      continue
      ;;
    --c* | \
    --sr* | \
    --ho* | \
    --bu* | \
    --t* | \
    --program-* | \
    -cache_file* | \
    -srcdir* | \
    -host* | \
    -build* | \
    -target* | \
    -program-prefix* | \
    -program-suffix* | \
    -program-transform-name* )
      skip_next=$separate_arg
      continue
      ;;
    -*)
      # An option.  Add it.
      case $ac_arg in
	*\'*)
	  ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
      esac
      baseargs="$baseargs '$ac_arg'"
      keep_next=$separate_arg
      ;;
    *)
      # Either a variable assignment, or a nonopt (triplet).  Don't
      # pass it down; let the Makefile handle this.
      continue
      ;;
  esac
done
# Remove the initial space we just introduced and, as these will be
# expanded by make, quote '$'.
baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`

# Add in --program-transform-name, after --program-prefix and
# --program-suffix have been applied to it.  Autoconf has already
# doubled dollar signs and backslashes in program_transform_name; we want
# the backslashes un-doubled, and then the entire thing wrapped in single
# quotes, because this will be expanded first by make and then by the shell. 
# Also, because we want to override the logic in subdir configure scripts to
# choose program_transform_name, replace any s,x,x, with s,y,y,.
sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
${program_transform_name}
EOF_SED
gcc_transform_name=`cat conftestsed.out`
rm -f conftestsed.out
baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
if test "$silent" = yes; then
  baseargs="$baseargs --silent"
fi

# For the build-side libraries, we just need to pretend we're native,
# and not use the same cache file.  Multilibs are neither needed nor
# desired.
build_configargs="--cache-file=../config.cache ${baseargs}"

# For host modules, accept cache file option, or specification as blank.
case "${cache_file}" in
"") # empty
  cache_file_option="" ;;
/* | [[A-Za-z]]:[[\\/]]* ) # absolute path
  cache_file_option="--cache-file=${cache_file}" ;;
*) # relative path
  cache_file_option="--cache-file=../${cache_file}" ;;
esac

# Host dirs don't like to share a cache file either, horribly enough.
# This seems to be due to autoconf 2.5x stupidity.
host_configargs="--cache-file=./config.cache ${extra_host_args} ${baseargs}"

target_configargs=${baseargs}

# Passing a --with-cross-host argument lets the target libraries know
# whether they are being built with a cross-compiler or being built
# native.  However, it would be better to use other mechanisms to make the
# sorts of decisions they want to make on this basis.  Please consider
# this option to be deprecated.  FIXME.
if test x${is_cross_compiler} = xyes ; then
  target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
fi

# Default to --enable-multilib.
if test x${enable_multilib} = x ; then
  target_configargs="--enable-multilib ${target_configargs}"
fi

# Pass --with-newlib if appropriate.  Note that target_configdirs has
# changed from the earlier setting of with_newlib.
if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
  target_configargs="--with-newlib ${target_configargs}"
fi

# Different target subdirs use different values of certain variables
# (notably CXX).  Worse, multilibs use *lots* of different values.
# Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
# it doesn't automatically accept command-line overrides of them.
# This means it's not safe for target subdirs to share a cache file,
# which is disgusting, but there you have it.  Hopefully this can be
# fixed in future.  It's still worthwhile to use a cache file for each
# directory.  I think.

# Pass the appropriate --build, --host, --target and --cache-file arguments.
# We need to pass --target, as newer autoconf's requires consistency
# for target_alias and gcc doesn't manage it consistently.
target_configargs="--cache-file=./config.cache ${target_configargs}"

FLAGS_FOR_TARGET=
case " $target_configdirs " in
 *" newlib "*)
  case " $target_configargs " in
  *" --with-newlib "*)
   case "$target" in
   *-cygwin*)
     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/include -isystem $$s/winsup/cygwin/include -isystem $$s/winsup/w32api/include' ;;
   esac

   # If we're not building GCC, don't discard standard headers.
   if test -d ${srcdir}/gcc; then
     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'

     if test "${build}" != "${host}"; then
       # On Canadian crosses, CC_FOR_TARGET will have already been set
       # by `configure', so we won't have an opportunity to add -Bgcc/
       # to it.  This is right: we don't want to search that directory
       # for binaries, but we want the header files in there, so add
       # them explicitly.
       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include'

       # Someone might think of using the pre-installed headers on
       # Canadian crosses, in case the installed compiler is not fully
       # compatible with the compiler being built.  In this case, it
       # would be better to flag an error than risking having
       # incompatible object files being constructed.  We can't
       # guarantee that an error will be flagged, but let's hope the
       # compiler will do it, when presented with incompatible header
       # files.
     fi
   fi

   case "${target}-${is_cross_compiler}" in
   i[[3456789]]86-*-linux*-no)
      # Here host == target, so we don't need to build gcc,
      # so we don't want to discard standard headers.
      FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
      ;;
   *)
      # If we're building newlib, use its generic headers last, but search
      # for any libc-related directories first (so make it the last -B
      # switch).
      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'

      # If we're building libgloss, find the startup file, simulator library
      # and linker script.
      case " $target_configdirs " in
	*" libgloss "*)
	# Look for startup file, simulator library and maybe linker script.
	FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
	# Look for libnosys.a in case the target needs it.
	FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
	# Most targets have the linker script in the source directory.
	FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
	;;
      esac
      ;;
   esac
   ;;
  esac
  ;;
esac
case "$target" in
*-mingw*)
  # Can't be handled as Cygwin above since Mingw does not use newlib.
  FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include' ;;
esac

# Allow the user to override the flags for
# our build compiler if desired.
if test x"${build}" = x"${host}" ; then
  CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
  CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
  LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
fi

# On Canadian crosses, we'll be searching the right directories for
# the previously-installed cross compiler, so don't bother to add
# flags for directories within the install tree of the compiler
# being built; programs in there won't even run.
if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
  # Search for pre-installed headers if nothing else fits.
  FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
fi

if test "x${use_gnu_ld}" = x &&
   echo " ${configdirs} " | grep " ld " > /dev/null ; then
  # Arrange for us to find uninstalled linker scripts.
  FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
fi

# Search for other target-specific linker scripts and such.
case "${target}" in
  mep*)
    FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
    ;;
esac

# Makefile fragments.
for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
do
  eval fragval=\$$frag
  if test $fragval != /dev/null; then
    eval $frag=${srcdir}/$fragval
  fi
done
AC_SUBST_FILE(host_makefile_frag)
AC_SUBST_FILE(target_makefile_frag)
AC_SUBST_FILE(alphaieee_frag)
AC_SUBST_FILE(ospace_frag)

# Miscellanea: directories, flags, etc.
AC_SUBST(RPATH_ENVVAR)
AC_SUBST(GCC_SHLIB_SUBDIR)
AC_SUBST(tooldir)
AC_SUBST(build_tooldir)
AC_SUBST(CONFIGURE_GDB_TK)
AC_SUBST(GDB_TK)
AC_SUBST(INSTALL_GDB_TK)

# Build module lists & subconfigure args.
AC_SUBST(build_configargs)
AC_SUBST(build_configdirs)

# Host module lists & subconfigure args.
AC_SUBST(host_configargs)
AC_SUBST(configdirs)

# Target module lists & subconfigure args.
AC_SUBST(target_configargs)


# Build tools.
AC_SUBST(AR_FOR_BUILD)
AC_SUBST(AS_FOR_BUILD)
AC_SUBST(CC_FOR_BUILD)
AC_SUBST(CFLAGS_FOR_BUILD)
AC_SUBST(CXXFLAGS_FOR_BUILD)
AC_SUBST(CXX_FOR_BUILD)
AC_SUBST(DLLTOOL_FOR_BUILD)
AC_SUBST(GCJ_FOR_BUILD)
AC_SUBST(GFORTRAN_FOR_BUILD)
AC_SUBST(LDFLAGS_FOR_BUILD)
AC_SUBST(LD_FOR_BUILD)
AC_SUBST(NM_FOR_BUILD)
AC_SUBST(RANLIB_FOR_BUILD)
AC_SUBST(WINDMC_FOR_BUILD)
AC_SUBST(WINDRES_FOR_BUILD)
AC_SUBST(config_shell)

# Generate default definitions for YACC, M4, LEX and other programs that run
# on the build machine.  These are used if the Makefile can't locate these
# programs in objdir.
MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing

AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
case " $build_configdirs " in
  *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
  *" byacc "*) YACC='$$r/$(BUILD_SUBDIR)/byacc/byacc' ;;
esac

AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
case " $build_configdirs " in
  *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
esac

AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
case " $build_configdirs " in
  *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
esac

AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
case " $build_configdirs " in
  *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
  *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
esac

AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
case " $build_configdirs " in
  *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
esac

AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
case " $build_configdirs " in
  *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
  *)
changequote(,)
    # For an installed makeinfo, we require it to be from texinfo 4.6 or
    # higher, else we use the "missing" dummy.
    if ${MAKEINFO} --version \
       | egrep 'texinfo[^0-9]*(4\.([6-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
      :
    else
      MAKEINFO="$MISSING makeinfo"
    fi
    ;;
changequote([,])
esac

# FIXME: expect and dejagnu may become build tools?

AC_CHECK_PROGS(EXPECT, expect, expect)
case " $configdirs " in
  *" expect "*)
    test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
    ;;
esac

AC_CHECK_PROGS(RUNTEST, runtest, runtest)
case " $configdirs " in
  *" dejagnu "*)
    test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
    ;;
esac


# Host tools.
NCN_STRICT_CHECK_TOOLS(AR, ar)
NCN_STRICT_CHECK_TOOLS(AS, as)
NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
NCN_STRICT_CHECK_TOOLS(LD, ld)
NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
NCN_STRICT_CHECK_TOOLS(NM, nm)
NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, :)
NCN_STRICT_CHECK_TOOLS(STRIP, strip, :)
NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
AC_SUBST(CC)
AC_SUBST(CXX)
AC_SUBST(CFLAGS)
AC_SUBST(CXXFLAGS)

# Target tools.
AC_ARG_WITH([build-time-tools], 
  [  --with-build-time-tools=PATH
                          use given path to find target tools during the build],
  [case x"$withval" in
     x/*) ;;
     *)
       with_build_time_tools=
       AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
       ;;
   esac],
  [with_build_time_tools=])

NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
NCN_STRICT_CHECK_TARGET_TOOLS(GCJ_FOR_TARGET, gcj)
NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)

ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib, :)
ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)

RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"

GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
		[gcc/g++ -B$$r/$(HOST_SUBDIR)/gcc/ -nostdinc++ `test ! -f $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags || $(SHELL) $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags --build-includes` -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs],
		c++)
GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
		[gcc/xgcc -shared-libgcc -B$$r/$(HOST_SUBDIR)/gcc -nostdinc++ -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs],
		c++)
GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
GCC_TARGET_TOOL(gcj, GCJ_FOR_TARGET, GCJ,
		[gcc/gcj -B$$r/$(HOST_SUBDIR)/gcc/], java)
GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
		[gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip])
GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])

AC_SUBST(FLAGS_FOR_TARGET)
AC_SUBST(RAW_CXX_FOR_TARGET)

# Certain tools may need extra flags.
AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}

# When building target libraries, except in a Canadian cross, we use
# the same toolchain as the compiler we just built.
COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
if test $host = $build; then
  case " $configdirs " in
    *" gcc "*)
      COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
      COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
      COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
      ;;
  esac
fi

AC_SUBST(COMPILER_AS_FOR_TARGET)
AC_SUBST(COMPILER_LD_FOR_TARGET)
AC_SUBST(COMPILER_NM_FOR_TARGET)

AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
AC_ARG_ENABLE(maintainer-mode,
[  --enable-maintainer-mode enable make rules and dependencies not useful
                          (and sometimes confusing) to the casual installer],
      USE_MAINTAINER_MODE=$enableval,
      USE_MAINTAINER_MODE=no)
AC_MSG_RESULT($USE_MAINTAINER_MODE)
AC_SUBST(MAINTAINER_MODE_TRUE)
AC_SUBST(MAINTAINER_MODE_FALSE)
if test "$USE_MAINTAINER_MODE" = yes; then
  MAINTAINER_MODE_TRUE=
  MAINTAINER_MODE_FALSE='#'
else
  MAINTAINER_MODE_TRUE='#'
  MAINTAINER_MODE_FALSE=
fi	
MAINT=$MAINTAINER_MODE_TRUE
AC_SUBST(MAINT)dnl

# ---------------------
# GCC bootstrap support
# ---------------------

# Stage specific cflags for build.
stage1_cflags="-g"
case $build in
  vax-*-*)
    case ${GCC} in
      yes) stage1_cflags="-g -Wa,-J" ;;
      *) stage1_cflags="-g -J" ;;
    esac ;;
esac

# This is aimed to mimic bootstrap with a non-GCC compiler to catch problems.
if test "$GCC" = yes; then
  saved_CFLAGS="$CFLAGS"

  # Pass -fkeep-inline-functions for stage 1 if the GCC version supports it.
  CFLAGS="$CFLAGS -fkeep-inline-functions"
  AC_MSG_CHECKING([whether -fkeep-inline-functions is supported])
  AC_TRY_COMPILE([
#if (__GNUC__ < 3) \
    || (__GNUC__ == 3 && (__GNUC_MINOR__ < 3 \
			  || (__GNUC_MINOR__ == 3 && __GNUC_PATCHLEVEL__ < 1)))
#error http://gcc.gnu.org/PR29382
#endif
    ],,
    [AC_MSG_RESULT([yes]); stage1_cflags="$stage1_cflags -fkeep-inline-functions"],
    [AC_MSG_RESULT([no])])

  CFLAGS="$saved_CFLAGS"
fi

AC_SUBST(stage1_cflags)

# Enable --enable-checking in stage1 of the compiler.
AC_ARG_ENABLE(stage1-checking,
[  --enable-stage1-checking@<:@=all@:>@   choose additional checking for stage1
                          of the compiler],
[stage1_checking=--enable-checking=${enable_stage1_checking}],
[if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
  stage1_checking=--enable-checking=yes,types
else
  stage1_checking=--enable-checking=$enable_checking,types
fi])
AC_SUBST(stage1_checking)

# Enable -Werror in bootstrap stage2 and later.
AC_ARG_ENABLE(werror,
[  --enable-werror         enable -Werror in bootstrap stage2 and later], [],
[if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
  enable_werror=yes
else
  enable_werror=no
fi])
case ${enable_werror} in
  yes) stage2_werror_flag="--enable-werror-always" ;;
  *) stage2_werror_flag="" ;;
esac
AC_SUBST(stage2_werror_flag)

# Flags needed to enable html installing and building
AC_ARG_WITH(datarootdir,
[  --with-datarootdir      use datarootdir as the data root directory.],
[datarootdir="\${prefix}/${withval}"],
[datarootdir="\${prefix}/share"])

AC_ARG_WITH(docdir,
[  --with-docdir           install documentation in this directory.],
[docdir="\${prefix}/${withval}"],
[docdir="\${datarootdir}/doc"])

AC_ARG_WITH(pdfdir,
[  --with-pdfdir           install pdf in this directory.],
[pdfdir="\${prefix}/${withval}"],
[pdfdir="\${docdir}"])

AC_ARG_WITH(htmldir,
[  --with-htmldir          install html in this directory.],
[htmldir="\${prefix}/${withval}"],
[htmldir="\${docdir}"])

AC_SUBST(datarootdir)
AC_SUBST(docdir)
AC_SUBST(pdfdir)
AC_SUBST(htmldir)

AC_OUTPUT(Makefile)