diff -r 54fb77e0762c configure
--- a/configure	Thu Jun 23 14:22:59 2011 +0200
+++ b/configure	Thu Jun 23 18:44:19 2011 +0200
@@ -8816,7 +8816,7 @@
 
       # Bug 662787: Using semaphores causes unexplicable hangs on Solaris 8.
       case  $ac_sys_system/$ac_sys_release in
-  SunOS/5.6)
+      SunOS/5.6)
 $as_echo "#define HAVE_PTHREAD_DESTRUCTOR 1" >>confdefs.h
 
 		       ;;
@@ -8824,14 +8824,10 @@
 $as_echo "#define HAVE_BROKEN_POSIX_SEMAPHORES 1" >>confdefs.h
 
 		       ;;
-      AIX/5)
+      AIX/*)
 $as_echo "#define HAVE_BROKEN_POSIX_SEMAPHORES 1" >>confdefs.h
 
 		       ;;
-      AIX/6)
-$as_echo "#define HAVE_BROKEN_POSIX_SEMAPHORES 1" >>confdefs.h
-
-                      ;;
       esac
 
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking if PTHREAD_SCOPE_SYSTEM is supported" >&5
diff -r 54fb77e0762c configure.in
--- a/configure.in	Thu Jun 23 14:22:59 2011 +0200
+++ b/configure.in	Thu Jun 23 18:44:19 2011 +0200
@@ -2196,18 +2196,15 @@
 
       # Bug 662787: Using semaphores causes unexplicable hangs on Solaris 8.
       case  $ac_sys_system/$ac_sys_release in
-  SunOS/5.6) AC_DEFINE(HAVE_PTHREAD_DESTRUCTOR, 1,
+      SunOS/5.6) AC_DEFINE(HAVE_PTHREAD_DESTRUCTOR, 1,
                        [Defined for Solaris 2.6 bug in pthread header.])
 		       ;;
       SunOS/5.8) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
 		       [Define if the Posix semaphores do not work on your system])
 		       ;;
-      AIX/5) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
+      AIX/*) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
 		       [Define if the Posix semaphores do not work on your system])
 		       ;;
-      AIX/6) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
-                      Define if the Posix semaphores do not work on your system)
-                      ;;
       esac
 
       AC_MSG_CHECKING(if PTHREAD_SCOPE_SYSTEM is supported)