Merge GDB 7.5.1

configure

Index: configure
diff --git a/configure b/configure
index 9a0086c99c93e9efa455a52409678c5a20a2e91f..6079e6c07511e12bb51ae5197e7110d79c36b098 100755
--- a/configure
+++ b/configure
@@ -2869,7 +2869,7 @@ case "${ENABLE_GOLD}" in
       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
       | *-*-linux* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
-      | *-*-solaris2* | *-*-nto*)
+      | *-*-solaris2* | *-*-nto* | *-*-nacl*)
         case "${target}" in
           *-*-linux*aout* | *-*-linux*oldld*)
             ;;
@@ -3054,7 +3054,7 @@ if test x$enable_libgomp = x ; then
 	;;
     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 	;;
-    *-*-solaris2* | *-*-irix6* | *-*-osf* | *-*-hpux11*)
+    *-*-solaris2* | *-*-hpux11*)
 	;;
     *-*-darwin* | *-*-aix*)
 	;;
@@ -3093,7 +3093,9 @@ case "${target}" in
     noconfigdirs="$noconfigdirs target-libssp"
     ;;
   rl78-*-*)
-    # Dereferencing -1 is a compile-time error
+    # libssp uses a misaligned load to trigger a fault, but the RL78
+    # doesn't fault for those - instead, it gives a build-time error
+    # for explicit misaligned loads.
     noconfigdirs="$noconfigdirs target-libssp"
     ;;
 esac
@@ -3143,7 +3145,7 @@ case "${target}" in
     ;;
   m68k-*-*)
     ;;
-  mips-sgi-irix6.* | mips*-*-rtems*)
+  mips*-*-rtems*)
     ;;
   mips*-*-linux*)
     ;;
@@ -3259,13 +3261,6 @@ case "${target}" in
   rs6000-*-aix*)
     noconfigdirs="$noconfigdirs ${libgcj}"
     ;;
-  mips*-*-irix6*)
-    # Linking libjava exceeds command-line length limits on at least
-    # IRIX 6.2, but not on IRIX 6.5.
-    # Also, boehm-gc won't build on IRIX 6.5, according to Jeffrey Oldham
-    # <oldham@codesourcery.com>
-    noconfigdirs="$noconfigdirs ${libgcj}"
-    ;;
   *-*-lynxos*)
     noconfigdirs="$noconfigdirs ${libgcj}"
     ;;
@@ -3503,8 +3498,7 @@ case "${target}" in
     noconfigdirs="$noconfigdirs libgui itcl ld"
     ;;
   ia64*-*-*vms*)
-    # No gdb or ld support yet.
-    noconfigdirs="$noconfigdirs readline libgui itcl gdb ld"
+    noconfigdirs="$noconfigdirs libgui itcl"
     ;;
   i[3456789]86-w64-mingw*)
     ;;
@@ -4977,7 +4971,7 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $acx_cv_cc_gcc_supports_ada" >&5
 $as_echo "$acx_cv_cc_gcc_supports_ada" >&6; }
 
-if test x$GNATBIND != xno && test x$GNATMAKE != xno && test x$acx_cv_cc_gcc_supports_ada != xno; then
+if test "x$GNATBIND" != xno && test "x$GNATMAKE" != xno && test x$acx_cv_cc_gcc_supports_ada != xno; then
   have_gnat=yes
 else
   have_gnat=no
@@ -5195,9 +5189,16 @@ 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
-  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=$$r/$(HOST_SUBDIR)/mpfr/'"$lt_cv_objdir"
+  # MPFR v3.1.0 moved the sources into a src sub-directory.
+  if test -d ${srcdir}/mpfr/src; then
+    gmplibs='-L$$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
@@ -6666,11 +6667,11 @@ if test "x$CFLAGS_FOR_TARGET" = x; then
   CFLAGS_FOR_TARGET=$CFLAGS
   case " $CFLAGS " in
     *" -O2 "*) ;;
-    *) CFLAGS_FOR_TARGET="-O2 $CFLAGS" ;;
+    *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
   esac
   case " $CFLAGS " in
     *" -g "* | *" -g3 "*) ;;
-    *) CFLAGS_FOR_TARGET="-g $CFLAGS" ;;
+    *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
   esac
 fi
 
@@ -6679,11 +6680,11 @@ if test "x$CXXFLAGS_FOR_TARGET" = x; then
   CXXFLAGS_FOR_TARGET=$CXXFLAGS
   case " $CXXFLAGS " in
     *" -O2 "*) ;;
-    *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS" ;;
+    *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
   esac
   case " $CXXFLAGS " in
     *" -g "* | *" -g3 "*) ;;
-    *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS" ;;
+    *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
   esac
 fi
 
@@ -6873,18 +6874,6 @@ case "${enable_target_optspace}:${target}" in
     ;;
 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="${extra_host_args} --with-stabs"
-    ;;
-  esac
-fi
-
 # Some systems (e.g., one of the i386-aix systems the gas testers are
 # using) don't handle "\$" correctly, so don't use it here.
 tooldir='${exec_prefix}'/${target_noncanonical}