(top level)

2004-03-11  Nathanael Nerode  <neroden@gcc.gnu.org>

	* configure: Regenerate.

2004-03-08  Paolo Bonzini  <bonzini@gnu.org>

	PR ada/14131
	Move language detection to the top level.
	* configure.in: Find default values for the tools as
	soon as possible.  Disable ada if GNAT is not found.
	Emit error message about missing languages.  Expand
	--enable-languages=all for the gcc subdirectory.

(config)
2004-03-08  Paolo Bonzini  <bonzini@gnu.org>

	PR ada/14131
	Move language detection to the top level.
	* acx.m4 (ACX_PROG_GNAT): New macro, moved here
	from the gcc subdirectory.

2004-03-09  Hans-Peter Nilsson  <hp@axis.com>

	* accross.m4 (AC_C_BIGENDIAN_CROSS): Compile endian probe with
	"-c".  Properly quote parameter for AC_MSG_ERROR.

1 files changed, 433 insertions, 403 deletions

diff --git a/configure.in b/configure.in
index 6b8154a3549..485d8f3b6eb 100644
--- a/configure.in
+++ b/configure.in
@@ -747,97 +747,448 @@ case "${noconfigdirs}" in
   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
 esac
 
+# Work in distributions that contain no compiler tools, like Autoconf.
+tentative_cc=""
+host_makefile_frag=/dev/null
+if test -d ${srcdir}/config ; then
+case "${host}" in
+  m68k-hp-hpux*)
+    # Avoid "too much defining" errors from HPUX compiler.
+    tentative_cc="cc -Wp,-H256000"
+    # If "ar" in $PATH is GNU ar, the symbol table may need rebuilding.
+    # If it's HP/UX ar, this should be harmless.
+    RANLIB="ar ts"
+    ;;
+  m68k-apollo-sysv*)
+    tentative_cc="cc -A ansi -A runtype,any -A systype,any -U__STDC__ -DUSG"
+    ;;
+  m68k-apollo-bsd*)
+    #None of the Apollo compilers can compile gas or binutils.  The preprocessor
+    # chokes on bfd, the compiler won't let you assign integers to enums, and
+    # other problems.  Defining CC to gcc is a questionable way to say "don't use
+    # the apollo compiler" (the preferred version of GCC could be called cc,
+    # or whatever), but I'm not sure leaving CC as cc is any better...
+    #CC=cc -A ansi -A runtype,any -A systype,any -U__STDC__ -DNO_STDARG
+    # Used to have BISON=yacc.
+    tentative_cc=gcc
+    ;;
+  m88k-dg-dgux*)
+    tentative_cc="gcc -Wall -ansi -D__using_DGUX"
+    ;;
+  m88k-harris-cxux*)
+    # Under CX/UX, we want to tell the compiler to use ANSI mode.
+    tentative_cc="cc -Xa"
+    host_makefile_frag="config/mh-cxux"
+    ;;
+  m88k-motorola-sysv*)
+    ;;
+  mips*-dec-ultrix*)
+    tentative_cc="cc -Wf,-XNg1000"
+    host_makefile_frag="config/mh-decstation"
+    ;;
+  mips*-nec-sysv4*)
+    # The C compiler on NEC MIPS SVR4 needs bigger tables.
+    tentative_cc="cc -ZXNd=5000 -ZXNg=1000"
+    host_makefile_frag="config/mh-necv4"
+    ;;
+  mips*-sgi-irix4*)
+    # Tell compiler to use K&R C.  We can't compile under the SGI Ansi
+    # environment.  Also bump switch table size so that cp-parse will
+    # compile.  Bump string length limit so linker builds.
+    tentative_cc="cc -cckr -Wf,-XNg1500 -Wf,-XNk1000 -Wf,-XNh2000 -Wf,-XNl8192"
+    ;;
+  mips*-*-sysv4*)
+    host_makefile_frag="config/mh-sysv4"
+    ;;
+  mips*-*-sysv*)
+    # This is for a MIPS running RISC/os 4.52C.
+
+    # This is needed for GDB, but needs to be in the top-level make because
+    # if a library is compiled with the bsd headers and gets linked with the
+    # sysv system libraries all hell can break loose (e.g. a jmp_buf might be
+    # a different size).
+    # ptrace(2) apparently has problems in the BSD environment.  No workaround is
+    # known except to select the sysv environment.  Could we use /proc instead?
+    # These "sysv environments" and "bsd environments" often end up being a pain.
+    #
+    # This is not part of CFLAGS because perhaps not all C compilers have this
+    # option.
+    tentative_cc="cc -systype sysv"
+    ;;
+  i370-ibm-opened*)
+    tentative_cc="c89"
+    ;;
+  i[[3456789]]86-*-sysv5*)
+    host_makefile_frag="config/mh-sysv5"
+    ;;
+  i[[3456789]]86-*-dgux*)
+    tentative_cc="gcc -Wall -ansi -D__using_DGUX"
+    host_makefile_frag="config/mh-dgux386"
+    ;;
+  i[[3456789]]86-ncr-sysv4.3*)
+    # The MetaWare compiler will generate a copyright message unless you
+    # turn it off by adding the -Hnocopyr flag.
+    tentative_cc="cc -Hnocopyr"
+    ;;
+  i[[3456789]]86-ncr-sysv4*)
+    # for an NCR 3000 (i486/SVR4) system.
+    # The NCR 3000 ships with a MetaWare compiler installed as /bin/cc.
+    # This compiler not only emits obnoxious copyright messages every time
+    # you run it, but it chokes and dies on a whole bunch of GNU source
+    # files.  Default to using the AT&T compiler installed in /usr/ccs/ATT/cc.
+    tentative_cc="/usr/ccs/ATT/cc"
+    host_makefile_frag="config/mh-ncr3000"
+    ;;
+  i[[3456789]]86-*-sco3.2v5*)
+    ;;
+  i[[3456789]]86-*-sco*)
+    # The native C compiler botches some simple uses of const.  Unfortunately,
+    # it doesn't defined anything like "__sco__" for us to test for in ansidecl.h.
+    tentative_cc="cc -Dconst="
+    host_makefile_frag="config/mh-sco"
+    ;;
+  i[[3456789]]86-*-udk*)
+    host_makefile_frag="config/mh-sysv5"
+    ;;
+  i[[3456789]]86-*-solaris2*)
+    host_makefile_frag="config/mh-sysv4"
+    ;;
+  i[[3456789]]86-*-msdosdjgpp*)
+    host_makefile_frag="config/mh-djgpp"
+    ;;
+  *-cygwin*)
+    host_makefile_frag="config/mh-cygwin"
+    ;;
+  *-mingw32*)
+    host_makefile_frag="config/mh-mingw32"
+    ;;
+  *-interix*)
+    host_makefile_frag="config/mh-interix"
+    ;;
+  vax-*-ultrix2*)
+    # The old BSD pcc isn't up to compiling parts of gdb so use gcc
+    tentative_cc=gcc
+    ;;
+  *-*-solaris2*)
+    host_makefile_frag="config/mh-solaris"
+    ;;
+  m68k-sun-sunos*)
+    # Sun's C compiler needs the -J flag to be able to compile cp-parse.c
+    # without overflowing the jump tables (-J says to use a 32 bit table)
+    tentative_cc="cc -J"
+    ;;
+  *-hp-hpux*)
+    tentative_cc="cc -Wp,-H256000"
+    ;;
+  *-*-hiux*)
+    tentative_cc="cc -Wp,-H256000"
+    ;;
+  rs6000-*-lynxos*)
+    # /bin/cc is less than useful for our purposes.  Always use GCC
+    tentative_cc="/usr/cygnus/progressive/bin/gcc"
+    host_makefile_frag="config/mh-lynxrs6k"
+    ;;
+  *-*-lynxos*)
+    # /bin/cc is less than useful for our purposes.  Always use GCC
+    tentative_cc="/bin/gcc"
+    ;;
+  *-*-sysv4*)
+    host_makefile_frag="config/mh-sysv4"
+    ;;
+esac
+fi
+
+# If we aren't going to be using gcc, see if we can extract a definition
+# of CC from the fragment.
+# Actually, use the 'pre-extracted' version above.
+if test -z "${CC}" && test "${build}" = "${host}" ; then
+  IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
+  found=
+  for dir in $PATH; do
+    test -z "$dir" && dir=.
+    if test -f $dir/gcc; then
+      found=yes
+      break
+    fi
+  done
+  IFS="$save_ifs"
+  if test -z "${found}" && test -n "${tentative_cc}" ; then
+    CC=$tentative_cc
+  fi
+fi
+
+if test "${build}" != "${host}" ; then
+  # If we are doing a Canadian Cross, in which the host and build systems
+  # are not the same, we set reasonable default values for the tools.
+
+  BISON=${BISON-bison}
+  CC=${CC-${host_alias}-gcc}
+  CFLAGS=${CFLAGS-"-g -O2"}
+  CXX=${CXX-${host_alias}-c++}
+  CXXFLAGS=${CXXFLAGS-"-g -O2"}
+  CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
+  CC_FOR_TARGET=${CC_FOR_TARGET-${target_alias}-gcc}
+  CXX_FOR_TARGET=${CXX_FOR_TARGET-${target_alias}-c++}
+  GCJ_FOR_TARGET=${GCJ_FOR_TARGET-${target_alias}-gcj}
+  GCC_FOR_TARGET=${GCC_FOR_TARGET-${CC_FOR_TARGET-${target_alias}-gcc}}
+  BUILD_PREFIX=${build_alias}-
+  BUILD_PREFIX_1=${build_alias}-
+  MAKEINFO=${MAKEINFO-makeinfo}
+
+  if test -z "${YACC}" ; then
+    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
+    for dir in $PATH; do
+      test -z "$dir" && dir=.
+      if test -f $dir/bison; then
+	YACC="bison -y"
+	break
+      fi
+      if test -f $dir/byacc; then
+	YACC=byacc
+	break
+      fi
+      if test -f $dir/yacc; then
+	YACC=yacc
+	break
+      fi
+    done
+    IFS="$save_ifs"
+    if test -z "${YACC}" ; then
+      YACC="bison -y"
+    fi
+  fi
+
+  if test -z "${LEX}" ; then
+    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
+    for dir in $PATH; do
+      test -z "$dir" && dir=.
+      if test -f $dir/flex; then
+	LEX=flex
+	break
+      fi
+      if test -f $dir/lex; then
+	LEX=lex
+	break
+      fi
+    done
+    IFS="$save_ifs"
+    LEX=${LEX-flex}
+  fi
+
+else
+  # Set reasonable default values for some tools even if not Canadian.
+  # Of course, these are different reasonable default values, originally
+  # specified directly in the Makefile.
+  # We don't export, so that autoconf can do its job.
+  # Note that all these settings are above the fragment inclusion point
+  # in Makefile.in, so can still be overridden by fragments.
+  # This is all going to change when we autoconfiscate...
+
+  BISON="\$(USUAL_BISON)"
+  CC_FOR_BUILD="\$(CC)"
+  GCC_FOR_TARGET="\$(USUAL_GCC_FOR_TARGET)"
+  BUILD_PREFIX=
+  BUILD_PREFIX_1=loser-
+  MAKEINFO="\$(USUAL_MAKEINFO)"
+  LEX="\$(USUAL_LEX)"
+  YACC="\$(USUAL_YACC)"
+
+  # If CC is still not set, try to get gcc.
+  cc_prog_is_gcc=
+  if test -z "${CC}" ; then
+    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
+    for dir in $PATH; do
+      test -z "$dir" && dir=.
+      if test -f $dir/gcc; then
+	CC="gcc"
+	cc_prog_is_gcc=yes
+	echo 'void f(){}' > conftest.c
+	if test -z "`${CC} -g -c conftest.c 2>&1`"; then
+	  CFLAGS=${CFLAGS-"-g -O2"}
+	  CXXFLAGS=${CXXFLAGS-"-g -O2"}
+	else
+	  CFLAGS=${CFLAGS-"-O2"}
+	  CXXFLAGS=${CXXFLAGS-"-O2"}
+	fi
+	rm -f conftest*
+	break
+      fi
+    done
+    IFS="$save_ifs"
+    CC=${CC-cc}
+  else
+    # Determine if we are using gcc.
+    cat > conftest.c <<EOF
+#ifdef __GNUC__
+  yes;
+#endif
+EOF
+    if ${CC} -E conftest.c | grep yes >/dev/null 2>&1; then
+      cc_prog_is_gcc=yes
+    fi
+    rm -f conftest.c
+    if test -z "${CFLAGS}"; then
+      # Here CC is set but CFLAGS is not.  Use a quick hack to use -O2 if CC
+      # is set to a version of gcc.
+      if test "$cc_prog_is_gcc" = yes; then
+	echo 'void f(){}' > conftest.c
+	if test -z "`${CC} -g -c conftest.c 2>&1`"; then
+	  CFLAGS=${CFLAGS-"-g -O2"}
+	  CXXFLAGS=${CXXFLAGS-"-g -O2"}
+	else
+	  CFLAGS=${CFLAGS-"-O2"}
+	  CXXFLAGS=${CXXFLAGS-"-O2"}
+	fi
+	rm -f conftest*
+      fi
+    fi
+  fi
+
+  # We must set the default linker to the linker used by gcc for the correct
+  # operation of libtool.  If LD is not defined and we are using gcc, try to
+  # set the LD default to the ld used by gcc.
+  if test -z "$LD"; then
+    if test "$cc_prog_is_gcc" = yes; then
+      case $build in
+      *-*-mingw*)
+	gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
+      *)
+	gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
+      esac
+      case $gcc_prog_ld in
+      # Accept absolute paths.
+      [[\\/]* | [A-Za-z]:[\\/]*)]
+        LD="$gcc_prog_ld" ;;
+      esac
+    fi
+  fi
+
+  CXX=${CXX-"c++"}
+  CFLAGS=${CFLAGS-"-g"}
+  CXXFLAGS=${CXXFLAGS-"-g -O2"}
+fi
+
+ACX_PROG_GNAT
+
 # Figure out what language subdirectories are present.
 # Look if the user specified --enable-languages="..."; if not, use
 # the environment variable $LANGUAGES if defined. $LANGUAGES might
 # go away some day.
 # NB:  embedded tabs in this IF block -- do not untabify
-if test x"${enable_languages+set}" != xset; then
-  if test x"${LANGUAGES+set}" = xset; then
-    enable_languages="${LANGUAGES}"
-      echo configure.in: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
+if test -d ${srcdir}/gcc; then
+  if test x"${enable_languages+set}" != xset; then
+    if test x"${LANGUAGES+set}" = xset; then
+      enable_languages="${LANGUAGES}"
+        echo configure.in: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
+    else
+      enable_languages=all
+    fi
   else
-    enable_languages=all
-  fi
-else
-  if test x"${enable_languages}" = x ||
-     test x"${enable_languages}" = xyes;
-     then
-    echo configure.in: --enable-languages needs at least one language argument 1>&2
-    exit 1
+    if test x"${enable_languages}" = x ||
+       test x"${enable_languages}" = xyes;
+       then
+      echo configure.in: --enable-languages needs at least one language argument 1>&2
+      exit 1
+    fi
   fi
-fi
-enable_languages=`echo "${enable_languages}" | sed -e 's/[[ 	,]][[ 	,]]*/,/g' -e 's/,$//'`
-
-# First scan to see if an enabled language requires some other language.
-# We assume that a given config-lang.in will list all the language
-# front ends it requires, even if some are required indirectly.
-for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
-  case ${lang_frag} in
-    ..) ;;
-    # The odd quoting in the next line works around
-    # an apparent bug in bash 1.12 on linux.
-    ${srcdir}/gcc/[[*]]/config-lang.in) ;;
-    *)
-      # From the config-lang.in, get $language, $lang_requires
-      language=
-      lang_requires=
-      . ${lang_frag}
-      for other in ${lang_requires} ; do
-        case ,${enable_languages}, in
-	  *,$other,*) ;;
-	  *,all,*) ;;
-	  *,$language,*)
-	    echo " \`$other' language required by \`$language'; enabling" 1>&2
-	    enable_languages="${enable_languages},${other}"
+  enable_languages=`echo "${enable_languages}" | sed -e 's/[[ 	,]][[ 	,]]*/,/g' -e 's/,$//'`
+
+  # First scan to see if an enabled language requires some other language.
+  # We assume that a given config-lang.in will list all the language
+  # front ends it requires, even if some are required indirectly.
+  for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
+    case ${lang_frag} in
+      ..) ;;
+      # The odd quoting in the next line works around
+      # an apparent bug in bash 1.12 on linux.
+      ${srcdir}/gcc/[[*]]/config-lang.in) ;;
+      *)
+        # From the config-lang.in, get $language, $lang_requires
+        language=
+        lang_requires=
+        . ${lang_frag}
+        for other in ${lang_requires} ; do
+          case ,${enable_languages}, in
+	    *,$other,*) ;;
+	    *,all,*) ;;
+	    *,$language,*)
+	      echo " \`$other' language required by \`$language'; enabling" 1>&2
+	      enable_languages="${enable_languages},${other}"
+	      ;;
+	  esac
+        done
+        ;;
+    esac
+  done
+
+  new_enable_languages=c
+  missing_languages=`echo ",$enable_languages," | sed -e s/,all,/,/ -e s/,c,/,/ `
+
+  for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
+    case ${lang_frag} in
+      ..) ;;
+      # The odd quoting in the next line works around
+      # an apparent bug in bash 1.12 on linux.
+      ${srcdir}/gcc/[[*]]/config-lang.in) ;;
+      *)
+        # From the config-lang.in, get $language, $target_libs, 
+        # $lang_dirs, and $build_by_default
+        language=
+        target_libs=
+        lang_dirs=
+        build_by_default=
+        . ${lang_frag}
+        # This is quite sensitive to the ordering of the case statement arms.
+        case ,${enable_languages},:${language}:${have_gnat}:${build_by_default} in
+          *::*:*)
+            echo "${lang_frag} doesn't set \$language." 1>&2
+            exit 1
 	    ;;
-	esac
-      done
-      ;;
-  esac
-done
+          *:ada:no:*)
+            # Ada was requested with no preexisting GNAT.  Disable unconditionally.
+            add_this_lang=no
+            ;;
+          *,${language},*:*:*:*)
+            # Language was explicitly selected; include it.
+            add_this_lang=yes
+            ;;
+          *,all,*:*:*:no)
+            # 'all' was selected, but this is not a default language
+	    # so do not include it.
+            add_this_lang=no
+	    ;;
+          *,all,*:*:*:*)
+            # 'all' was selected and this is a default language; include it.
+            add_this_lang=yes
+            ;;
+          *)
+            add_this_lang=no
+            ;;
+        esac
+        case $add_this_lang in
+	  no)
+            # Remove language-dependent dirs.
+            eval noconfigdirs='"$noconfigdirs "'\"$target_libs $lang_dirs\" ;;
+          *)
+	    new_enable_languages="$new_enable_languages,$language"
+	    missing_languages="`echo "$missing_languages" | sed "s/,$language,/,/"`" ;;
+        esac
+        ;;
+    esac
+  done
 
-for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
-  case ${lang_frag} in
-    ..) ;;
-    # The odd quoting in the next line works around
-    # an apparent bug in bash 1.12 on linux.
-    ${srcdir}/gcc/[[*]]/config-lang.in) ;;
-    *)
-      # From the config-lang.in, get $language, $target_libs, 
-      # $lang_dirs, and $build_by_default
-      language=
-      target_libs=
-      lang_dirs=
-      build_by_default=
-      . ${lang_frag}
-      if test "x$language" = x ; then
-        echo "${lang_frag} doesn't set \$language." 1>&2
-        exit 1
-      fi
-      case ,${enable_languages}, in
-        *,${language},*)
-          # Language was explicitly selected; include it.
-          add_this_lang=yes
-          ;;
-        *,all,*)
-          # 'all' was selected; include 'default' languages.
-          case ${build_by_default} in
-            no) add_this_lang=no ;;
-            *) add_this_lang=yes ;;
-          esac 
-          ;;
-        *) add_this_lang=no ;;
-      esac
-      case ${add_this_lang} in
-        no)
-          # Remove language-dependent dirs.
-          eval noconfigdirs='"$noconfigdirs "'\"$target_libs $lang_dirs\"
-          ;;
-      esac
-      ;;
-  esac
-done
+  missing_languages="`echo "$missing_languages" | sed -e s/^,// -e s/,$//`"
+  if test "x$missing_languages" != x; then
+    AC_MSG_ERROR([
+The following requested languages were not found: ${missing_languages}])
+  fi
+
+  if test "x$new_enable_languages" != "x$enable_languages"; then
+    echo The following languages will be built: ${new_enable_languages}
+  fi
+  enable_languages="$new_enable_languages"
+  ac_configure_args="`echo " $ac_configure_args" | sed -e 's/ --enable-languages=[[^ ]]*//' -e 's/$/ --enable-languages='"$enable_languages"/ `"
+fi
 
 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs and
 # $target_configdirs.
@@ -1014,157 +1365,6 @@ while test $# != 0 ; do
   shift; shift
 done
 
-# Work in distributions that contain no compiler tools, like Autoconf.
-tentative_cc=""
-host_makefile_frag=/dev/null
-if test -d ${srcdir}/config ; then
-case "${host}" in
-  m68k-hp-hpux*)
-    # Avoid "too much defining" errors from HPUX compiler.
-    tentative_cc="cc -Wp,-H256000"
-    # If "ar" in $PATH is GNU ar, the symbol table may need rebuilding.
-    # If it's HP/UX ar, this should be harmless.
-    RANLIB="ar ts"
-    ;;
-  m68k-apollo-sysv*)
-    tentative_cc="cc -A ansi -A runtype,any -A systype,any -U__STDC__ -DUSG"
-    ;;
-  m68k-apollo-bsd*)
-    #None of the Apollo compilers can compile gas or binutils.  The preprocessor
-    # chokes on bfd, the compiler won't let you assign integers to enums, and
-    # other problems.  Defining CC to gcc is a questionable way to say "don't use
-    # the apollo compiler" (the preferred version of GCC could be called cc,
-    # or whatever), but I'm not sure leaving CC as cc is any better...
-    #CC=cc -A ansi -A runtype,any -A systype,any -U__STDC__ -DNO_STDARG
-    # Used to have BISON=yacc.
-    tentative_cc=gcc
-    ;;
-  m88k-dg-dgux*)
-    tentative_cc="gcc -Wall -ansi -D__using_DGUX"
-    ;;
-  m88k-harris-cxux*)
-    # Under CX/UX, we want to tell the compiler to use ANSI mode.
-    tentative_cc="cc -Xa"
-    host_makefile_frag="config/mh-cxux"
-    ;;
-  m88k-motorola-sysv*)
-    ;;
-  mips*-dec-ultrix*)
-    tentative_cc="cc -Wf,-XNg1000"
-    host_makefile_frag="config/mh-decstation"
-    ;;
-  mips*-nec-sysv4*)
-    # The C compiler on NEC MIPS SVR4 needs bigger tables.
-    tentative_cc="cc -ZXNd=5000 -ZXNg=1000"
-    host_makefile_frag="config/mh-necv4"
-    ;;
-  mips*-sgi-irix4*)
-    # Tell compiler to use K&R C.  We can't compile under the SGI Ansi
-    # environment.  Also bump switch table size so that cp-parse will
-    # compile.  Bump string length limit so linker builds.
-    tentative_cc="cc -cckr -Wf,-XNg1500 -Wf,-XNk1000 -Wf,-XNh2000 -Wf,-XNl8192"
-    ;;
-  mips*-*-sysv4*)
-    host_makefile_frag="config/mh-sysv4"
-    ;;
-  mips*-*-sysv*)
-    # This is for a MIPS running RISC/os 4.52C.
-
-    # This is needed for GDB, but needs to be in the top-level make because
-    # if a library is compiled with the bsd headers and gets linked with the
-    # sysv system libraries all hell can break loose (e.g. a jmp_buf might be
-    # a different size).
-    # ptrace(2) apparently has problems in the BSD environment.  No workaround is
-    # known except to select the sysv environment.  Could we use /proc instead?
-    # These "sysv environments" and "bsd environments" often end up being a pain.
-    #
-    # This is not part of CFLAGS because perhaps not all C compilers have this
-    # option.
-    tentative_cc="cc -systype sysv"
-    ;;
-  i370-ibm-opened*)
-    tentative_cc="c89"
-    ;;
-  i[[3456789]]86-*-sysv5*)
-    host_makefile_frag="config/mh-sysv5"
-    ;;
-  i[[3456789]]86-*-dgux*)
-    tentative_cc="gcc -Wall -ansi -D__using_DGUX"
-    host_makefile_frag="config/mh-dgux386"
-    ;;
-  i[[3456789]]86-ncr-sysv4.3*)
-    # The MetaWare compiler will generate a copyright message unless you
-    # turn it off by adding the -Hnocopyr flag.
-    tentative_cc="cc -Hnocopyr"
-    ;;
-  i[[3456789]]86-ncr-sysv4*)
-    # for an NCR 3000 (i486/SVR4) system.
-    # The NCR 3000 ships with a MetaWare compiler installed as /bin/cc.
-    # This compiler not only emits obnoxious copyright messages every time
-    # you run it, but it chokes and dies on a whole bunch of GNU source
-    # files.  Default to using the AT&T compiler installed in /usr/ccs/ATT/cc.
-    tentative_cc="/usr/ccs/ATT/cc"
-    host_makefile_frag="config/mh-ncr3000"
-    ;;
-  i[[3456789]]86-*-sco3.2v5*)
-    ;;
-  i[[3456789]]86-*-sco*)
-    # The native C compiler botches some simple uses of const.  Unfortunately,
-    # it doesn't defined anything like "__sco__" for us to test for in ansidecl.h.
-    tentative_cc="cc -Dconst="
-    host_makefile_frag="config/mh-sco"
-    ;;
-  i[[3456789]]86-*-udk*)
-    host_makefile_frag="config/mh-sysv5"
-    ;;
-  i[[3456789]]86-*-solaris2*)
-    host_makefile_frag="config/mh-sysv4"
-    ;;
-  i[[3456789]]86-*-msdosdjgpp*)
-    host_makefile_frag="config/mh-djgpp"
-    ;;
-  *-cygwin*)
-    host_makefile_frag="config/mh-cygwin"
-    ;;
-  *-mingw32*)
-    host_makefile_frag="config/mh-mingw32"
-    ;;
-  *-interix*)
-    host_makefile_frag="config/mh-interix"
-    ;;
-  vax-*-ultrix2*)
-    # The old BSD pcc isn't up to compiling parts of gdb so use gcc
-    tentative_cc=gcc
-    ;;
-  *-*-solaris2*)
-    host_makefile_frag="config/mh-solaris"
-    ;;
-  m68k-sun-sunos*)
-    # Sun's C compiler needs the -J flag to be able to compile cp-parse.c
-    # without overflowing the jump tables (-J says to use a 32 bit table)
-    tentative_cc="cc -J"
-    ;;
-  *-hp-hpux*)
-    tentative_cc="cc -Wp,-H256000"
-    ;;
-  *-*-hiux*)
-    tentative_cc="cc -Wp,-H256000"
-    ;;
-  rs6000-*-lynxos*)
-    # /bin/cc is less than useful for our purposes.  Always use GCC
-    tentative_cc="/usr/cygnus/progressive/bin/gcc"
-    host_makefile_frag="config/mh-lynxrs6k"
-    ;;
-  *-*-lynxos*)
-    # /bin/cc is less than useful for our purposes.  Always use GCC
-    tentative_cc="/bin/gcc"
-    ;;
-  *-*-sysv4*)
-    host_makefile_frag="config/mh-sysv4"
-    ;;
-esac
-fi
-
 extra_arflags_for_target=
 extra_nmflags_for_target=
 extra_ranlibflags_for_target=
@@ -1279,25 +1479,6 @@ case "${host}" in
     ;;
 esac
 
-# If we aren't going to be using gcc, see if we can extract a definition
-# of CC from the fragment.
-# Actually, use the 'pre-extracted' version above.
-if test -z "${CC}" && test "${build}" = "${host}" ; then
-  IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
-  found=
-  for dir in $PATH; do
-    test -z "$dir" && dir=.
-    if test -f $dir/gcc; then
-      found=yes
-      break
-    fi
-  done
-  IFS="$save_ifs"
-  if test -z "${found}" && test -n "${tentative_cc}" ; then
-    CC=$tentative_cc
-  fi
-fi
-
 # Some systems (e.g., one of the i386-aix systems the gas testers are
 # using) don't handle "\$" correctly, so don't use it here.
 tooldir='${exec_prefix}'/${target_alias}
@@ -1360,157 +1541,6 @@ do
   test -n "$DEFAULT_LEX" && break
 done
 
-if test "${build}" != "${host}" ; then
-  # If we are doing a Canadian Cross, in which the host and build systems
-  # are not the same, we set reasonable default values for the tools.
-
-  BISON=${BISON-bison}
-  CC=${CC-${host_alias}-gcc}
-  CFLAGS=${CFLAGS-"-g -O2"}
-  CXX=${CXX-${host_alias}-c++}
-  CXXFLAGS=${CXXFLAGS-"-g -O2"}
-  CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
-  CC_FOR_TARGET=${CC_FOR_TARGET-${target_alias}-gcc}
-  CXX_FOR_TARGET=${CXX_FOR_TARGET-${target_alias}-c++}
-  GCJ_FOR_TARGET=${GCJ_FOR_TARGET-${target_alias}-gcj}
-  GCC_FOR_TARGET=${GCC_FOR_TARGET-${CC_FOR_TARGET-${target_alias}-gcc}}
-  BUILD_PREFIX=${build_alias}-
-  BUILD_PREFIX_1=${build_alias}-
-  MAKEINFO=${MAKEINFO-makeinfo}
-
-  if test -z "${YACC}" ; then
-    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
-    for dir in $PATH; do
-      test -z "$dir" && dir=.
-      if test -f $dir/bison; then
-	YACC="bison -y"
-	break
-      fi
-      if test -f $dir/byacc; then
-	YACC=byacc
-	break
-      fi
-      if test -f $dir/yacc; then
-	YACC=yacc
-	break
-      fi
-    done
-    IFS="$save_ifs"
-    if test -z "${YACC}" ; then
-      YACC="bison -y"
-    fi
-  fi
-
-  if test -z "${LEX}" ; then
-    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
-    for dir in $PATH; do
-      test -z "$dir" && dir=.
-      if test -f $dir/flex; then
-	LEX=flex
-	break
-      fi
-      if test -f $dir/lex; then
-	LEX=lex
-	break
-      fi
-    done
-    IFS="$save_ifs"
-    LEX=${LEX-flex}
-  fi
-
-else
-  # Set reasonable default values for some tools even if not Canadian.
-  # Of course, these are different reasonable default values, originally
-  # specified directly in the Makefile.
-  # We don't export, so that autoconf can do its job.
-  # Note that all these settings are above the fragment inclusion point
-  # in Makefile.in, so can still be overridden by fragments.
-  # This is all going to change when we autoconfiscate...
-
-  BISON="\$(USUAL_BISON)"
-  CC_FOR_BUILD="\$(CC)"
-  GCC_FOR_TARGET="\$(USUAL_GCC_FOR_TARGET)"
-  BUILD_PREFIX=
-  BUILD_PREFIX_1=loser-
-  MAKEINFO="\$(USUAL_MAKEINFO)"
-  LEX="\$(USUAL_LEX)"
-  YACC="\$(USUAL_YACC)"
-
-  # If CC is still not set, try to get gcc.
-  cc_prog_is_gcc=
-  if test -z "${CC}" ; then
-    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
-    for dir in $PATH; do
-      test -z "$dir" && dir=.
-      if test -f $dir/gcc; then
-	CC="gcc"
-	cc_prog_is_gcc=yes
-	echo 'void f(){}' > conftest.c
-	if test -z "`${CC} -g -c conftest.c 2>&1`"; then
-	  CFLAGS=${CFLAGS-"-g -O2"}
-	  CXXFLAGS=${CXXFLAGS-"-g -O2"}
-	else
-	  CFLAGS=${CFLAGS-"-O2"}
-	  CXXFLAGS=${CXXFLAGS-"-O2"}
-	fi
-	rm -f conftest*
-	break
-      fi
-    done
-    IFS="$save_ifs"
-    CC=${CC-cc}
-  else
-    # Determine if we are using gcc.
-    cat > conftest.c <<EOF
-#ifdef __GNUC__
-  yes;
-#endif
-EOF
-    if ${CC} -E conftest.c | grep yes >/dev/null 2>&1; then
-      cc_prog_is_gcc=yes
-    fi
-    rm -f conftest.c
-    if test -z "${CFLAGS}"; then
-      # Here CC is set but CFLAGS is not.  Use a quick hack to use -O2 if CC
-      # is set to a version of gcc.
-      if test "$cc_prog_is_gcc" = yes; then
-	echo 'void f(){}' > conftest.c
-	if test -z "`${CC} -g -c conftest.c 2>&1`"; then
-	  CFLAGS=${CFLAGS-"-g -O2"}
-	  CXXFLAGS=${CXXFLAGS-"-g -O2"}
-	else
-	  CFLAGS=${CFLAGS-"-O2"}
-	  CXXFLAGS=${CXXFLAGS-"-O2"}
-	fi
-	rm -f conftest*
-      fi
-    fi
-  fi
-
-  # We must set the default linker to the linker used by gcc for the correct
-  # operation of libtool.  If LD is not defined and we are using gcc, try to
-  # set the LD default to the ld used by gcc.
-  if test -z "$LD"; then
-    if test "$cc_prog_is_gcc" = yes; then
-      case $build in
-      *-*-mingw*)
-	gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
-      *)
-	gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
-      esac
-      case $gcc_prog_ld in
-      # Accept absolute paths.
-      [[\\/]* | [A-Za-z]:[\\/]*)]
-        LD="$gcc_prog_ld" ;;
-      esac
-    fi
-  fi
-
-  CXX=${CXX-"c++"}
-  CFLAGS=${CFLAGS-"-g"}
-  CXXFLAGS=${CXXFLAGS-"-g -O2"}
-fi
-
 # FIXME Should this be done recursively ??? (Useful for e.g. gdbtest)
 # Set up the list of links to be made.
 # ${links} is the list of link names, and ${files} is the list of names to link to.