X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=configure.ac;h=5f7f9d1d33f57617bd4b284a04c0a2423c302567;hb=fe28477410156dd23a82361d99553973986c932f;hp=dc72b2f137fa7a60fbcf4b260e593e4ebda44e1d;hpb=7ab76cecd643d0d098fb7293340afa0e2b5f9f37;p=pf3gnuchains%2Fgcc-fork.git

diff --git a/configure.ac b/configure.ac
index dc72b2f137f..5f7f9d1d33f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -24,7 +24,8 @@ m4_include(config/override.m4)
 m4_include(config/proginstall.m4)
 
 AC_INIT(move-if-change)
-AC_PREREQ(2.59)
+AC_PREREQ(2.64)
+AC_DISABLE_OPTION_CHECKING
 
 progname=$0
 # if PWD already has a value, it is probably wrong.
@@ -78,6 +79,8 @@ m4_pattern_allow([^AS_FOR_BUILD$])dnl
 AC_PROG_INSTALL
 ACX_PROG_LN
 AC_PROG_LN_S
+AC_PROG_SED
+AC_PROG_AWK
 
 ### we might need to use some other shell than /bin/sh for running subshells
 ### If we are on Windows, search for the shell.  This will permit people
@@ -166,7 +169,7 @@ host_libs="intl mmalloc libiberty opcodes bfd readline tcl tk itcl libgui zlib l
 # binutils, gas and ld appear in that order because it makes sense to run
 # "make check" in that particular order.
 # If --enable-gold is used, "gold" will replace "ld".
-host_tools="texinfo byacc flex bison binutils gas ld fixincludes gcc sid sim gdb make patch prms send-pr gprof etc expect dejagnu ash bash bzip2 m4 autoconf automake libtool diff rcs fileutils shellutils time textutils wdiff find uudecode hello tar gzip indent recode release sed utils guile perl gawk findutils gettext zip fastjar gnattools"
+host_tools="texinfo byacc flex bison binutils gas ld fixincludes gcc cgen sid sim gdb make patch prms send-pr gprof etc expect dejagnu ash bash bzip2 m4 autoconf automake libtool diff rcs fileutils shellutils time textutils wdiff find uudecode hello tar gzip indent recode release sed utils guile perl gawk findutils gettext zip fastjar gnattools"
 
 # libgcj represents the runtime libraries only used by gcj.
 libgcj="target-libffi \
@@ -232,6 +235,11 @@ fi
 
 # Find the build and target subdir names.
 GCC_TOPLEV_SUBDIRS
+# Be sure to cover against remnants of an in-tree build.
+if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
+  AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
+Use a pristine source tree when building in a separate tree])
+fi
 
 # Skipdirs are removed silently.
 skipdirs=
@@ -252,6 +260,13 @@ if test x$with_gnu_as = xno ; then
   noconfigdirs="$noconfigdirs gas"
 fi
 
+use_included_zlib=
+# Make sure we don't let ZLIB be added if we didn't want it.
+if test x$with_system_zlib = xyes ; then
+  use_included_zlib=no
+  noconfigdirs="$noconfigdirs zlib"
+fi
+
 # some tools are so dependent upon X11 that if we're not building with X, 
 # it's not even worth trying to configure, much less build, that tool.
 
@@ -450,7 +465,11 @@ case "${target}" in
     noconfigdirs="$noconfigdirs ld gas gdb gprof"
     noconfigdirs="$noconfigdirs sim target-rda"
     ;;
-  i[[3456789]]86-*-darwin* | x86_64-*-darwin[[912]]*)
+  i[[3456789]]86-*-darwin*)
+    noconfigdirs="$noconfigdirs ld gprof"
+    noconfigdirs="$noconfigdirs sim target-rda"
+    ;;
+  x86_64-*-darwin[[912]]*)
     noconfigdirs="$noconfigdirs ld gas gprof"
     noconfigdirs="$noconfigdirs sim target-rda"
     ;;
@@ -596,7 +615,8 @@ case "${target}" in
     noconfigdirs="$noconfigdirs target-libiberty target-libstdc++-v3 ${libgcj} target-libssp"
     ;;
   bfin-*-*)
-    noconfigdirs="$noconfigdirs gdb"
+    unsupported_languages="$unsupported_languages java"
+    noconfigdirs="$noconfigdirs target-boehm-gc gdb"
     if test x${is_cross_compiler} != xno ; then
       target_configdirs="${target_configdirs} target-bsp target-cygmon"
     fi
@@ -721,14 +741,16 @@ case "${target}" in
     # if the --with-newlib option has been given, because otherwise
     # 'target-newlib' will appear in skipdirs.
     ;;
-  i[[3456789]]86-*-mingw32*)
+  i[[3456789]]86-w64-mingw*)
+    noconfigdirs="$noconfigdirs expect target-libgloss target-newlib ${libgcj}"
+    ;;
+  i[[3456789]]86-*-mingw*)
     target_configdirs="$target_configdirs target-winsup"
     noconfigdirs="$noconfigdirs expect target-libgloss target-newlib ${libgcj}"
-    ;;    
+    ;;
   x86_64-*-mingw*)
-    target_configdirs="$target_configdirs target-winsup"
     noconfigdirs="$noconfigdirs expect target-libgloss target-newlib ${libgcj}"
-    ;;    
+    ;;
   *-*-cygwin*)
     target_configdirs="$target_configdirs target-libtermcap target-winsup"
     noconfigdirs="$noconfigdirs target-gperf target-libgloss"
@@ -738,7 +760,7 @@ case "${target}" in
     elif test -d "$srcdir/newlib"; then
       echo "Warning: winsup/cygwin is missing so newlib can't be built."
     fi
-    ;;    
+    ;;
   i[[3456789]]86-moss-msdos | i[[3456789]]86-*-moss* | \
   i[[3456789]]86-*-uwin* | i[[3456789]]86-*-interix* )
     ;;
@@ -836,6 +858,9 @@ case "${target}" in
   m68k-apollo-*)
     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss ${libgcj}"
     ;;
+  microblaze*)
+    noconfigdirs="$noconfigdirs gprof ${libgcj}"
+    ;;
   mips*-sde-elf*)
     skipdirs="$skipdirs target-libiberty"
     noconfigdirs="$noconfigdirs ${libgcj}"
@@ -874,7 +899,12 @@ case "${target}" in
       i[[3456789]]86-*-msdosdjgpp*) ;; # don't add gprof back in
       *) skipdirs=`echo " ${skipdirs} " | sed -e 's/ gprof / /'` ;;
     esac
-    noconfigdirs="$noconfigdirs target-libgloss ${libgcj}"
+    case "${target}" in
+      sh*-*-elf)
+         noconfigdirs="$noconfigdirs ${libgcj}" ;;
+      *)
+         noconfigdirs="$noconfigdirs target-libgloss ${libgcj}" ;;
+    esac
     ;;
   sparclet-*-aout* | sparc86x-*-*)
     libgloss_dir=sparc
@@ -1337,7 +1367,7 @@ if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
     CFLAGS="$CFLAGS $mpcinc"
     AC_MSG_CHECKING([for the correct version of mpc.h])
     AC_TRY_COMPILE([#include <mpc.h>],[
-    #if MPC_VERSION < MPC_VERSION_NUM (0,6,0)
+    #if MPC_VERSION < MPC_VERSION_NUM (0,7,0)
     choke me
     #endif
     ], [AC_MSG_RESULT([yes]); have_mpc=maybe],
@@ -1383,6 +1413,7 @@ if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
     mpc_proj (n, n, MPC_RNDNN);
     mpc_neg (n, n, MPC_RNDNN);
     mpc_sqr (n, n, MPC_RNDNN);
+    mpc_pow (n, n, n, MPC_RNDNN);
     mpc_clear (n);
     ], [AC_MSG_RESULT([yes]); have_mpc=yes],
        [AC_MSG_RESULT([no]); have_mpc=no; mpclibs= ; mpcinc= ])
@@ -1468,11 +1499,11 @@ AC_SUBST(poststage1_ldflags)
 # Libraries to use for stage2 and later builds.  This defaults to the
 # argument passed to --with-host-libstdcxx.
 AC_ARG_WITH(boot-libs,
-[  --with-boot-libs=LIBS     Libraries for stage2 and later]
+[  --with-boot-libs=LIBS     Libraries for stage2 and later],
 [if test "$withval" = "no" -o "$withval" = "yes"; then
    poststage1_libs=
  else
-  poststage1_libs=$withval
+   poststage1_libs=$withval
  fi],
 [poststage1_libs=$with_host_libstdcxx])
 AC_SUBST(poststage1_libs)
@@ -1485,7 +1516,7 @@ pplinc=
 
 AC_ARG_WITH(ppl, [  --with-ppl=PATH         Specify prefix directory for the installed PPL package
                           Equivalent to --with-ppl-include=PATH/include
-                          plus --with-ppl-lib=PATH/lib],, with_ppl=no)
+                          plus --with-ppl-lib=PATH/lib],, with_ppl=yes)
 AC_ARG_WITH(ppl_include, [  --with-ppl-include=PATH Specify directory for installed PPL include files])
 AC_ARG_WITH(ppl_lib, [  --with-ppl-lib=PATH     Specify the directory for the installed PPL library])
 
@@ -1493,10 +1524,11 @@ case $with_ppl in
   no)
     ppllibs=
     ;;
+  yes)
+    ;;
   *)
     ppllibs="-L$with_ppl/lib -lppl_c -lppl -lgmpxx"
     pplinc="-I$with_ppl/include $pplinc"
-    LIBS="$ppllibs $LIBS"
     ;;
 esac
 if test "x$with_ppl_include" != x; then
@@ -1504,12 +1536,10 @@ if test "x$with_ppl_include" != x; then
 fi
 if test "x$with_ppl_lib" != x; then
   ppllibs="-L$with_ppl_lib -lppl_c -lppl -lgmpxx"
-  LIBS="$ppllibs $LIBS"
 fi
 if test "x$with_ppl$with_ppl_include$with_ppl_lib" = x && test -d ${srcdir}/ppl; then
   ppllibs='-L$$r/$(HOST_SUBDIR)/ppl/.libs -L$$r/$(HOST_SUBDIR)/ppl/_libs -lppl_c -lppl -lgmpxx '
   pplinc='-I$$r/$(HOST_SUBDIR)/ppl/include -I$$s/ppl/include '
-  LIBS="$ppllibs $LIBS"
 fi
 
 AC_ARG_ENABLE(ppl-version-check,
@@ -1517,7 +1547,7 @@ AC_ARG_ENABLE(ppl-version-check,
 ENABLE_PPL_CHECK=$enableval,
 ENABLE_PPL_CHECK=yes)
 
-if test "${ENABLE_PPL_CHECK}" = "yes"; then
+if test "x$with_ppl" != "xno" -a "${ENABLE_PPL_CHECK}" = "yes"; then
   saved_CFLAGS="$CFLAGS"
   CFLAGS="$CFLAGS $pplinc $gmpinc"
   AC_MSG_CHECKING([for version $ppl_major_version.$ppl_minor_version of PPL])
@@ -1525,7 +1555,7 @@ if test "${ENABLE_PPL_CHECK}" = "yes"; then
   #if PPL_VERSION_MAJOR != $ppl_major_version || PPL_VERSION_MINOR != $ppl_minor_version
   choke me
   #endif
-  ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); ppllibs= ; pplinc= ])
+  ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); ppllibs= ; pplinc= ; with_ppl=no ])
   CFLAGS="$saved_CFLAGS"
 fi
 
@@ -1540,19 +1570,24 @@ clooginc=" -DCLOOG_PPL_BACKEND "
 
 AC_ARG_WITH(cloog, [  --with-cloog=PATH       Specify prefix directory for the installed CLooG-PPL package
                           Equivalent to --with-cloog-include=PATH/include
-                          plus --with-cloog-lib=PATH/lib],, with_cloog=no)
+                          plus --with-cloog-lib=PATH/lib],, with_cloog=yes)
 AC_ARG_WITH(cloog_include, [  --with-cloog-include=PATH Specify directory for installed CLooG include files])
 AC_ARG_WITH(cloog_lib, [  --with-cloog-lib=PATH   Specify the directory for the installed CLooG library])
 
+if test "x$with_ppl" = "xno"; then
+  with_cloog=no
+fi
+
 case $with_cloog in 
   no)
     clooglibs=
     clooginc=
     ;;
+  yes)
+    ;;
   *)
     clooglibs="-L$with_cloog/lib -lcloog"
     clooginc="-I$with_cloog/include -DCLOOG_PPL_BACKEND "
-    LIBS="$clooglibs $LIBS"
     ;;
 esac
 if test "x$with_cloog_include" != x; then
@@ -1560,12 +1595,10 @@ if test "x$with_cloog_include" != x; then
 fi
 if test "x$with_cloog_lib" != x; then
   clooglibs="-L$with_cloog_lib -lcloog"
-  LIBS="$clooglibs $LIBS"
 fi
 if test "x$with_cloog$with_cloog_include$with_cloog_lib" = x && test -d ${srcdir}/cloog; then
   clooglibs='-L$$r/$(HOST_SUBDIR)/cloog/.libs -L$$r/$(HOST_SUBDIR)/cloog/_libs -lcloog '
   clooginc='-I$$r/$(HOST_SUBDIR)/cloog/include -I$$s/cloog/include -DCLOOG_PPL_BACKEND '
-  LIBS="$clooglibs $LIBS"
 fi
 
 AC_ARG_ENABLE(cloog-version-check,
@@ -1573,7 +1606,7 @@ AC_ARG_ENABLE(cloog-version-check,
 ENABLE_CLOOG_CHECK=$enableval,
 ENABLE_CLOOG_CHECK=yes)
 
-if test "${ENABLE_CLOOG_CHECK}" = "yes"; then
+if test "x$with_cloog" != "xno" -a "${ENABLE_CLOOG_CHECK}" = "yes"; then
   saved_CFLAGS="$CFLAGS"
   CFLAGS="$CFLAGS $clooginc $gmpinc $pplinc"
   AC_MSG_CHECKING([for correct version of CLooG])
@@ -1589,6 +1622,127 @@ fi
 AC_SUBST(clooglibs)
 AC_SUBST(clooginc)
 
+# Check for LTO support.
+AC_ARG_ENABLE(lto,
+[  --enable-lto            enable link time optimization support],
+enable_lto=$enableval,
+enable_lto=yes; default_enable_lto=yes)
+
+if test x"$enable_lto" = x"yes" ; then
+  # Make sure that libelf.h and gelf.h are available.
+  AC_ARG_WITH(libelf, [  --with-libelf=PATH       Specify prefix directory for the installed libelf package
+                          Equivalent to --with-libelf-include=PATH/include
+                          plus --with-libelf-lib=PATH/lib])
+
+  AC_ARG_WITH(libelf_include, [  --with-libelf-include=PATH Specify directory for installed libelf include files])
+
+  AC_ARG_WITH(libelf_lib, [  --with-libelf-lib=PATH   Specify the directory for the installed libelf library])
+
+  saved_CFLAGS="$CFLAGS"
+  saved_CPPFLAGS="$CPPFLAGS"
+  saved_LIBS="$LIBS"
+
+  case $with_libelf in 
+    "")
+      libelflibs="-lelf"
+      libelfinc="-I/usr/include/libelf"
+      ;;
+    *)
+      libelflibs="-L$with_libelf/lib -lelf"
+      libelfinc="-I$with_libelf/include -I$with_libelf/include/libelf"
+      LIBS="$libelflibs $LIBS"
+      ;;
+  esac
+
+  if test "x$with_libelf_include" != x; then
+    libelfinc="-I$with_libelf_include"
+  fi
+
+  if test "x$with_libelf_lib" != x; then
+    libelflibs="-L$with_libelf_lib -lelf"
+    LIBS="$libelflibs $LIBS"
+  fi
+
+  if test "x$with_libelf$with_libelf_include$with_libelf_lib" = x \
+     && test -d ${srcdir}/libelf; then
+    libelflibs='-L$$r/$(HOST_SUBDIR)/libelf/.libs -L$$r/$(HOST_SUBDIR)/libelf/_libs -lelf '
+    libelfinc='-I$$r/$(HOST_SUBDIR)/libelf/include -I$$s/libelf/include'
+    LIBS="$libelflibs $LIBS"
+  fi
+
+  CFLAGS="$CFLAGS $libelfinc"
+  CPPFLAGS="$CPPFLAGS $libelfinc"
+  LIBS="$LIBS $libelflibs"
+
+  AC_CHECK_HEADERS(libelf.h, [have_libelf_h=yes])
+  AC_CHECK_HEADERS(gelf.h, [have_gelf_h=yes])
+
+  AC_CHECK_HEADERS(libelf/libelf.h, [have_libelf_libelf_h=yes])
+  AC_CHECK_HEADERS(libelf/gelf.h, [have_libelf_gelf_h=yes])
+
+  # If we couldn't find libelf.h and the user forced it, emit an error.
+  if test x"$have_libelf_h" != x"yes" \
+     && test x"$have_libelf_libelf_h" != x"yes" ; then
+    if test x"$default_enable_lto" != x"yes" ; then
+      AC_MSG_ERROR([LTO support requires libelf.h or libelf/libelf.h.])
+    else
+      enable_lto=no
+      libelflibs=
+      libelfinc=
+    fi
+  fi
+
+  # If we couldn't find gelf.h and the user forced it, emit an error.
+  if test x"$have_gelf_h" != x"yes" \
+     && test x"$have_libelf_gelf_h" != x"yes" ; then
+    if test x"$default_enable_lto" != x"yes" ; then
+      AC_MSG_ERROR([LTO support requires gelf.h or libelf/gelf.h.])
+    else
+      enable_lto=no
+      libelflibs=
+      libelfinc=
+    fi
+  fi
+
+  # Check that the detected libelf has the functions we need.  We cannot
+  # rely on just detecting the headers since they do not include 
+  # versioning information.  Add functions, if needed.
+  if test x"$enable_lto" = x"yes" ; then
+    AC_MSG_CHECKING([for the correct version of libelf])
+    AC_TRY_LINK(
+      [#include <libelf.h>],[
+      elf_errmsg (0);
+      elf_getscn (0, 0);
+      elf_nextscn (0, 0);
+      elf_strptr (0, 0, 0);
+      elf_getident (0, 0);
+      elf_getshdrstrndx (0, 0);
+      elf_begin (0, 0, 0);
+      elf_ndxscn (0);
+      elf_end (0);
+      ],
+      [AC_MSG_RESULT([yes]);],
+      [AC_MSG_RESULT([no]); enable_lto=no; libelflibs= ; libelfinc= ]
+    )
+
+    # If we couldn't enable LTO and the user forced it, emit an error.
+    if test x"$enable_lto" = x"no" \
+       && test x"$default_enable_lto" != x"yes" ; then
+      AC_MSG_ERROR([To enable LTO, GCC requires libelf v0.8.12+.
+Try the --with-libelf, --with-libelf-include and --with-libelf-lib options
+to specify its location.])
+    fi
+  fi
+
+  CFLAGS="$saved_CFLAGS"
+  CPPFLAGS="$saved_CPPFLAGS"
+  LIBS="$saved_LIBS"
+
+  # Flags needed for libelf.
+  AC_SUBST(libelflibs)
+  AC_SUBST(libelfinc)
+fi
+
 
 # By default, C is the only stage 1 language.
 stage1_languages=,c,
@@ -1657,6 +1811,21 @@ if test -d ${srcdir}/gcc; then
   done
 
   new_enable_languages=,c,
+
+  # If LTO is enabled, add the LTO front end.
+  extra_host_libiberty_configure_flags=
+  if test "$enable_lto" = "yes" ; then
+    case ,${enable_languages}, in
+      *,lto,*) ;;
+      *) enable_languages="${enable_languages},lto" ;;
+    esac
+    if test "${ENABLE_GOLD}" = "yes" ; then
+      configdirs="$configdirs lto-plugin"
+      extra_host_libiberty_configure_flags=--enable-shared
+    fi
+  fi
+  AC_SUBST(extra_host_libiberty_configure_flags)
+
   missing_languages=`echo ",$enable_languages," | sed -e s/,all,/,/ -e s/,c,/,/ `
   potential_languages=,c,
 
@@ -1747,10 +1916,13 @@ if test -d ${srcdir}/gcc; then
 	    new_enable_languages="${new_enable_languages}${language},"
             potential_languages="${potential_languages}${language},"
 	    missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
-	    case ${boot_language} in
-	      yes)
+	    case "${boot_language}:,$enable_stage1_languages," in
+	      yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
 		# Add to (comma-separated) list of stage 1 languages.
-		stage1_languages="${stage1_languages}${language},"
+		case ",$stage1_languages," in
+		  *,$language,* | ,yes, | ,all,) ;;
+		  *) stage1_languages="${stage1_languages}${language}," ;;
+		esac
 		# We need to bootstrap any supporting libraries.
 		bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
 		;;
@@ -2063,7 +2235,7 @@ if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
   fi
 fi
 
-# Set with_gnu_as and with_gnu_ld as appropriate.
+# Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
 #
 # This is done by determining whether or not the appropriate directory
 # is available, and by checking whether or not specific configurations
@@ -2074,7 +2246,9 @@ fi
 #
 # If the default for a toolchain is to use GNU as and ld, and you don't 
 # want to do that, then you should use the --without-gnu-as and
-# --without-gnu-ld options for the configure script.
+# --without-gnu-ld options for the configure script.  Similarly, if
+# the default is to use the included zlib and you don't want to do that,
+# you should use the --with-system-zlib option for the configure script.
 
 if test x${use_gnu_as} = x &&
    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
@@ -2088,6 +2262,14 @@ if test x${use_gnu_ld} = x &&
   extra_host_args="$extra_host_args --with-gnu-ld"
 fi
 
+if test x${use_included_zlib} = x &&
+   echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
+  :
+else
+  with_system_zlib=yes
+  extra_host_args="$extra_host_args --with-system-zlib"
+fi
+
 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
 # can detect this case.
 
@@ -2395,12 +2577,13 @@ INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
 # configuration, so that the top-level Makefile reconfigures them,
 # like we used to do when configure itself was recursive.
 
-# Loop over modules.  $extrasub must be used with care, limiting as
-# much as possible the usage of range addresses.  That's because autoconf
-# splits the sed script to overcome limits in the number of commands,
-# and relying on carefully-timed sed passes may turn out to be very hard
-# to maintain later.  In this particular case, you just have to be careful
-# not to nest @if/@endif pairs, because configure will not warn you at all.
+# Loop over modules.  We used to use the "$extrasub" feature from Autoconf
+# but now we're fixing up the Makefile ourselves with the additional
+# commands passed to AC_CONFIG_FILES.  Use separate variables
+# extrasub-{build,host,target} not because there is any reason to split
+# the substitutions up that way, but only to remain below the limit of
+# 99 commands in a script, for HP-UX sed.
+# Do not nest @if/@endif pairs, because configure will not warn you at all.
 
 AC_ARG_ENABLE([bootstrap],
 [  --enable-bootstrap      enable bootstrapping @<:@yes if native build@:>@],,
@@ -2443,26 +2626,78 @@ case "$have_compiler:$host:$target:$enable_bootstrap" in
     ;;
 esac
 
+case ",$enable_languages,:$ENABLE_BUILD_WITH_CXX:$enable_bootstrap" in
+  *,c++,*:yes:yes) ;;
+  *:yes:yes)
+    AC_MSG_ERROR([bootstrapping with --enable-build-with-cxx requires c++ in --enable-languages])
+    ;;
+esac
+
+case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
+  yes:yes:*\ gold\ *:*,c++,*) ;;
+  yes:yes:*\ gold\ *:*)
+    AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
+    ;;
+esac
+
 # Adjust the toplevel makefile according to whether bootstrap was selected.
-case "$enable_bootstrap" in
+case $enable_bootstrap in
   yes)
-    bootstrap_suffix=bootstrap ;;
+    bootstrap_suffix=bootstrap
+    BUILD_CONFIG=bootstrap-debug
+    ;;
   no)
-    bootstrap_suffix=no-bootstrap ;;
+    bootstrap_suffix=no-bootstrap
+    BUILD_CONFIG=
+    ;;
 esac
 
+AC_MSG_CHECKING(for default BUILD_CONFIG)
+
+AC_ARG_WITH([build-config],
+  [--with-build-config='NAME NAME2...'
+                          Use config/NAME.mk build configuration],
+  [case $with_build_config in
+   yes) with_build_config= ;;
+   no) with_build_config= BUILD_CONFIG= ;;
+   esac])
+
+if test "x${with_build_config}" != x; then
+  BUILD_CONFIG=$with_build_config
+else
+  case $BUILD_CONFIG in
+  bootstrap-debug)
+    if echo "int f (void) { return 0; }" > conftest.c &&
+       ${CC} -c conftest.c &&
+       mv conftest.o conftest.o.g0 &&
+       ${CC} -c -g conftest.c &&
+       mv conftest.o conftest.o.g &&
+       ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g; then
+      :
+    else
+      BUILD_CONFIG=
+    fi
+    rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
+    ;;
+  esac
+fi
+AC_MSG_RESULT($BUILD_CONFIG)
+AC_SUBST(BUILD_CONFIG)
+
+extrasub_build=
 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="$extrasub
+  extrasub_build="$extrasub_build
 /^@if build-$module\$/d
 /^@endif build-$module\$/d
 /^@if build-$module-$bootstrap_suffix\$/d
 /^@endif build-$module-$bootstrap_suffix\$/d"
 done
+extrasub_host=
 for module in ${configdirs} ; do
   if test -z "${no_recursion}"; then
     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
@@ -2472,12 +2707,13 @@ for module in ${configdirs} ; do
       fi
     done
   fi
-  extrasub="$extrasub
+  extrasub_host="$extrasub_host
 /^@if $module\$/d
 /^@endif $module\$/d
 /^@if $module-$bootstrap_suffix\$/d
 /^@endif $module-$bootstrap_suffix\$/d"
 done
+extrasub_target=
 for module in ${target_configdirs} ; do
   if test -z "${no_recursion}" \
      && test -f ${target_subdir}/${module}/Makefile; then
@@ -2491,14 +2727,15 @@ for module in ${target_configdirs} ; do
     *) target_bootstrap_suffix=no-bootstrap ;;
   esac
 
-  extrasub="$extrasub
+  extrasub_target="$extrasub_target
 /^@if target-$module\$/d
 /^@endif target-$module\$/d
 /^@if target-$module-$target_bootstrap_suffix\$/d
 /^@endif target-$module-$target_bootstrap_suffix\$/d"
 done
 
-extrasub="$extrasub
+# Do the final fixup along with target modules.
+extrasub_target="$extrasub_target
 /^@if /,/^@endif /d"
 
 # Create the serialization dependencies.  This uses a temporary file.
@@ -2553,9 +2790,11 @@ 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.
+# might not want to pass down to subconfigures.  The exception being
+# --cache-file=/dev/null, which is used to turn off the use of cache
+# files altogether, and which should be passed on 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
@@ -2594,6 +2833,13 @@ do
   esac
 
   case "$ac_arg" in
+    --cache-file=/dev/null | \
+    -cache-file=/dev/null )
+      # Handled here to avoid the test to skip args below.
+      baseargs="$baseargs '$ac_arg'"
+      # Assert: $separate_arg should always be no.
+      keep_next=$separate_arg
+      ;;
     --no*)
       continue
       ;;
@@ -2650,6 +2896,7 @@ baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
 if test "$silent" = yes; then
   baseargs="$baseargs --silent"
 fi
+baseargs="$baseargs --disable-option-checking"
 
 # 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
@@ -2712,8 +2959,9 @@ case " $target_configdirs " in
   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' ;;
+    *-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.
@@ -2769,10 +3017,17 @@ case " $target_configdirs " in
   esac
   ;;
 esac
+
 case "$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' ;;
+  x86_64-*mingw* | *-w64-mingw*)
+  # MinGW-w64 does not use newlib, nor does it use winsup. It may,
+  # however, use a symlink named 'mingw' in ${prefix} .
+    FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
+    ;;
+  *-mingw*)
+  # MinGW can't be handled as Cygwin above since it does not use newlib.
+    FLAGS_FOR_TARGET=$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
@@ -3106,30 +3361,21 @@ case ${enable_werror} in
 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)
+# Specify what files to not compare during bootstrap.
+
+compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
+case "$target" in
+  hppa*64*-*-hpux*) ;;
+  hppa*-*-hpux*) compare_exclusions="gcc/cc*-checksum\$(objext) | */libgcc/lib2funcs* | gcc/ada/*tools/*" ;;
+esac
+AC_SUBST(compare_exclusions)
+
+AC_CONFIG_FILES([Makefile],
+  [sed "$extrasub_build" Makefile |
+   sed "$extrasub_host" |
+   sed "$extrasub_target" > mf$$
+   mv -f mf$$ Makefile],
+  [extrasub_build="$extrasub_build"
+   extrasub_host="$extrasub_host"
+   extrasub_target="$extrasub_target"])
+AC_OUTPUT