diff --git a/ChangeLog b/ChangeLog
index cf0933ee2..42701f7a3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2008-02-14  Nick Clifton  <nickc@redhat.com>
+
+	Import this patch from gcc:
+	2008-01-24  David Edelsohn  <edelsohn@gnu.org>
+
+	* libtool.m4: Backport AIX 6 support from ToT Libtool.
+
 2008-02-02  Hans-Peter Nilsson  <hp@axis.com>
 
 	* configure.ac: Enable fortran for cris-*-elf and crisv32-*-elf.
diff --git a/libtool.m4 b/libtool.m4
index df40fe83e..ddc4b1189 100644
--- a/libtool.m4
+++ b/libtool.m4
@@ -1993,7 +1993,7 @@ aix3*)
   soname_spec='${libname}${release}${shared_ext}$major'
   ;;
 
-aix4* | aix5*)
+aix[[4-9]]*)
   version_type=linux
   need_lib_prefix=no
   need_version=no
@@ -2834,7 +2834,7 @@ lt_cv_deplibs_check_method='unknown'
 # whether `pass_all' will *always* work, you probably want this one.
 
 case $host_os in
-aix4* | aix5*)
+aix[[4-9]]*)
   lt_cv_deplibs_check_method=pass_all
   ;;
 
@@ -3461,7 +3461,7 @@ m4_if([$1], [CXX], [
     esac
   else
     case $host_os in
-      aix4* | aix5*)
+      aix[[4-9]]*)
 	# All AIX code is PIC.
 	if test "$host_cpu" = ia64; then
 	  # AIX 5 now supports IA64 processor
@@ -3986,7 +3986,7 @@ AC_MSG_CHECKING([whether the $compiler linker ($LD) supports shared libraries])
 m4_if([$1], [CXX], [
   _LT_TAGVAR(export_symbols_cmds, $1)='$NM $libobjs $convenience | $global_symbol_pipe | $SED '\''s/.* //'\'' | sort | uniq > $export_symbols'
   case $host_os in
-  aix4* | aix5*)
+  aix[[4-9]]*)
     # If we're using GNU nm, then we don't want the "-C" option.
     # -C means demangle to AIX nm, but means don't demangle with GNU nm
     if $NM -V 2>&1 | $GREP 'GNU' > /dev/null; then
@@ -4092,7 +4092,7 @@ m4_if([$1], [CXX], [
 
     # See if GNU ld supports shared libraries.
     case $host_os in
-    aix3* | aix4* | aix5*)
+    aix[[3-9]]*)
       # On AIX/PPC, the GNU linker is very broken
       if test "$host_cpu" != ia64; then
 	_LT_TAGVAR(ld_shlibs, $1)=no
@@ -4326,7 +4326,7 @@ _LT_EOF
       fi
       ;;
 
-    aix4* | aix5*)
+    aix[[4-9]]*)
       if test "$host_cpu" = ia64; then
 	# On IA64, the linker does run time linking by default, so we don't
 	# have to do anything special.
@@ -4346,7 +4346,7 @@ _LT_EOF
 	# Test if we are trying to use run time linking or normal
 	# AIX style linking. If -brtl is somewhere in LDFLAGS, we
 	# need to do runtime linking.
-	case $host_os in aix4.[[23]]|aix4.[[23]].*|aix5*)
+	case $host_os in aix4.[[23]]|aix4.[[23]].*|aix[[5-9]]*)
 	  for ld_flag in $LDFLAGS; do
 	  if (test $ld_flag = "-brtl" || test $ld_flag = "-Wl,-brtl"); then
 	    aix_use_runtimelinking=yes
@@ -5138,7 +5138,7 @@ if test -n "$compiler"; then
     fi
     ;;
 
-  aix4* | aix5*)
+  aix[[4-9]]*)
     if test "$host_cpu" != ia64 && test "$aix_use_runtimelinking" = no ; then
       test "$enable_shared" = yes && enable_static=no
     fi
@@ -5328,7 +5328,7 @@ if test "$_lt_caught_CXX_error" != yes; then
         # FIXME: insert proper C++ library support
         _LT_TAGVAR(ld_shlibs, $1)=no
         ;;
-      aix4* | aix5*)
+      aix[[4-9]]*)
         if test "$host_cpu" = ia64; then
           # On IA64, the linker does run time linking by default, so we don't
           # have to do anything special.
@@ -5341,7 +5341,7 @@ if test "$_lt_caught_CXX_error" != yes; then
           # Test if we are trying to use run time linking or normal
           # AIX style linking. If -brtl is somewhere in LDFLAGS, we
           # need to do runtime linking.
-          case $host_os in aix4.[[23]]|aix4.[[23]].*|aix5*)
+          case $host_os in aix4.[[23]]|aix4.[[23]].*|aix[[5-9]]*)
 	    for ld_flag in $LDFLAGS; do
 	      case $ld_flag in
 	      *-brtl*)
@@ -6555,7 +6555,7 @@ if test "$_lt_disable_F77" != yes; then
           postinstall_cmds='$RANLIB $lib'
         fi
         ;;
-      aix4* | aix5*)
+      aix[[4-9]]*)
 	if test "$host_cpu" != ia64 && test "$aix_use_runtimelinking" = no ; then
 	  test "$enable_shared" = yes && enable_static=no
 	fi
@@ -6696,7 +6696,7 @@ if test "$_lt_disable_FC" != yes; then
           postinstall_cmds='$RANLIB $lib'
         fi
         ;;
-      aix4* | aix5*)
+      aix[[4-9]]*)
 	if test "$host_cpu" != ia64 && test "$aix_use_runtimelinking" = no ; then
 	  test "$enable_shared" = yes && enable_static=no
 	fi