Sync toplevel configure with upstream GCC.

This fixes a problem, where libgloss wouldn't be built for ARC processors,
even though it is actually supported. The original patch that introduced
support for ARC in libgloss hasn't been submitted to GCC maillist, hence
when top-level configure has been synced with GCC - this libgloss patch has
been effectively reverted.

Libgloss support for ARC has been accepted in GCC:
https://gcc.gnu.org/ml/gcc-patches/2016-05/msg01148.html

ChangeLog

2016-05-17  Anton Kolesov  <Anton.Kolesov@synopsys.com>

	* configure.ac: Sync with upstream GCC.
	* configure: Regenerate.

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>

configure

@@ -3446,8 +3446,6 @@ case "${target}" in
     ;;
   sh-*-* | sh[34]*-*-*)
     ;;
-  sh64-*-* | sh5*-*-*)
-    ;;
   sparc*-*-*)
     ;;
   x86_64-*-*)
@@ -3758,9 +3756,6 @@ case "${target}" in
   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
     ;;
-  arc-*-*|arceb-*-*)
-    noconfigdirs="$noconfigdirs target-libgloss"
-    ;;
   arm-*-pe*)
     noconfigdirs="$noconfigdirs target-libgloss"
     ;;
@@ -3946,7 +3941,7 @@ case "${target}" in
   or1k*-*-*)
     noconfigdirs="$noconfigdirs gdb"
     ;;
-  sh-*-* | sh64-*-*)
+  sh-*-*)
     case "${target}" in
       sh*-*-elf)
          ;;
@@ -5570,16 +5565,9 @@ if test "x$with_mpfr_lib" != x; then
   gmplibs="-L$with_mpfr_lib $gmplibs"
 fi
 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
-  # MPFR v3.1.0 moved the sources into a src sub-directory.
-  if test -d ${srcdir}/mpfr/src; then
   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
-  else
-    gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir $gmplibs"
-    gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr -I$$s/mpfr '"$gmpinc"
-    extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir"
-  fi
   # Do not test the mpfr version.  Assume that it is sufficient, since
   # it is in the source tree, and the library has not been built yet
   # but it would be included on the link line in the version check below
@@ -14850,16 +14838,17 @@ else
   # For --disable-checking or implicit --enable-checking=release, avoid
   # setting --enable-checking=gc in the default stage1 checking for LTO
   # bootstraps.  See PR62077.
-  stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types
   case $BUILD_CONFIG in
     *lto*)
+      stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
+    *)
+      stage1_checking=--enable-checking=yes,types;;
+  esac
   if test "x$enable_checking" = x && \
      test -d ${srcdir}/gcc && \
      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
-	stage1_checking=--enable-checking=yes,types
+    stage1_checking=--enable-checking=yes,types,extra
-      fi;;
+  fi
-    *) stage1_checking=--enable-checking=yes,types;;
-  esac
 else
   stage1_checking=--enable-checking=$enable_checking,types
 fi

configure.ac

@@ -782,8 +782,6 @@ case "${target}" in
     ;;
   sh-*-* | sh[[34]]*-*-*)
     ;;
-  sh64-*-* | sh5*-*-*)
-    ;;
   sparc*-*-*)
     ;;
   x86_64-*-*)
@@ -1094,9 +1092,6 @@ case "${target}" in
   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
     ;;
-  arc-*-*|arceb-*-*)
-    noconfigdirs="$noconfigdirs target-libgloss"
-    ;;
   arm-*-pe*)
     noconfigdirs="$noconfigdirs target-libgloss"
     ;;
@@ -1282,7 +1277,7 @@ case "${target}" in
   or1k*-*-*)
     noconfigdirs="$noconfigdirs gdb"
     ;;
-  sh-*-* | sh64-*-*)
+  sh-*-*)
     case "${target}" in
       sh*-*-elf)
          ;;
@@ -1550,16 +1545,9 @@ if test "x$with_mpfr_lib" != x; then
   gmplibs="-L$with_mpfr_lib $gmplibs"
 fi
 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
-  # MPFR v3.1.0 moved the sources into a src sub-directory.
-  if test -d ${srcdir}/mpfr/src; then
   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
-  else
-    gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir $gmplibs"
-    gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr -I$$s/mpfr '"$gmpinc"
-    extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir"
-  fi
   # Do not test the mpfr version.  Assume that it is sufficient, since
   # it is in the source tree, and the library has not been built yet
   # but it would be included on the link line in the version check below
@@ -3530,16 +3518,17 @@ AC_ARG_ENABLE(stage1-checking,
   # For --disable-checking or implicit --enable-checking=release, avoid
   # setting --enable-checking=gc in the default stage1 checking for LTO
   # bootstraps.  See PR62077.
-  stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types
   case $BUILD_CONFIG in
     *lto*)
+      stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
+    *)
+      stage1_checking=--enable-checking=yes,types;;
+  esac
   if test "x$enable_checking" = x && \
      test -d ${srcdir}/gcc && \
      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
-	stage1_checking=--enable-checking=yes,types
+    stage1_checking=--enable-checking=yes,types,extra
-      fi;;
+  fi
-    *) stage1_checking=--enable-checking=yes,types;;
-  esac
 else
   stage1_checking=--enable-checking=$enable_checking,types
 fi])