diff --git a/ChangeLog b/ChangeLog
index 3166bf9ba..05ad1b95a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2009-03-16  Tristan Gingold  <gingold@adacore.com>
+
+	* configure.ac: Treat gdb as supported on x86_64-darwin.
+	* configure: Regenerate.
+
 2009-03-16  Joseph Myers  <joseph@codesourcery.com>
 
 	Merge from GCC:
diff --git a/configure b/configure
index fc95fec84..c807df8ec 100755
--- a/configure
+++ b/configure
@@ -2211,11 +2211,11 @@ case "${target}" in
   *-*-chorusos)
     noconfigdirs="$noconfigdirs target-newlib target-libgloss ${libgcj}"
     ;;
-  powerpc-*-darwin* | x86_64-*-darwin[912]*)
+  powerpc-*-darwin*)
     noconfigdirs="$noconfigdirs ld gas gdb gprof"
     noconfigdirs="$noconfigdirs sim target-rda"
     ;;
-  i[3456789]86-*-darwin*)
+  i[3456789]86-*-darwin* | x86_64-*-darwin9*)
     noconfigdirs="$noconfigdirs ld gas gprof"
     noconfigdirs="$noconfigdirs sim target-rda"
     ;;
diff --git a/configure.ac b/configure.ac
index 9ac0824a5..3b51f743f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -446,11 +446,11 @@ case "${target}" in
   *-*-chorusos)
     noconfigdirs="$noconfigdirs target-newlib target-libgloss ${libgcj}"
     ;;
-  powerpc-*-darwin* | x86_64-*-darwin[[912]]*)
+  powerpc-*-darwin*)
     noconfigdirs="$noconfigdirs ld gas gdb gprof"
     noconfigdirs="$noconfigdirs sim target-rda"
     ;;
-  i[[3456789]]86-*-darwin*)
+  i[[3456789]]86-*-darwin* | x86_64-*-darwin9*)
     noconfigdirs="$noconfigdirs ld gas gprof"
     noconfigdirs="$noconfigdirs sim target-rda"
     ;;