Fix for aix4 which defines clock_gettime, but it only returns

ENOSYS

configure.in

@@ -1913,7 +1913,7 @@ AC_CHECK_FUNCS(alarm bcmp bfill bmove bzero chsize cuserid fchmod fcntl \
   getcwd gethostbyaddr_r gethostbyname_r getpass getpassphrase getpwnam \
   getpwuid getrlimit getrusage getwd gmtime_r index initgroups isnan \
   localtime_r locking longjmp lrand48 madvise mallinfo memcpy memmove \
-  mkstemp mlockall perror poll pread pthread_attr_create clock_gettime \
+  mkstemp mlockall perror poll pread pthread_attr_create \
   pthread_attr_getstacksize pthread_attr_setprio pthread_attr_setschedparam \
   pthread_attr_setstacksize pthread_condattr_create pthread_getsequence_np \
   pthread_key_delete pthread_rwlock_rdlock pthread_setprio \
@@ -1922,6 +1922,18 @@ AC_CHECK_FUNCS(alarm bcmp bfill bmove bzero chsize cuserid fchmod fcntl \
   snprintf socket stpcpy strcasecmp strerror strnlen strpbrk strstr strtol \
   strtoll strtoul strtoull tell tempnam thr_setconcurrency vidattr)
 
+#
+#
+#
+case "$target" in
+ *-*-aix4*)
+	# (grr) aix 4.3 has a stub for clock_gettime, (returning ENOSYS)
+	# and using AC_TRY_RUN is hard when cross-compiling
+    ;;
+ *) AC_CHECK_FUNCS(clock_gettime)
+    ;;
+esac
+
 # isinf() could be a function or a macro (HPUX)
 AC_MSG_CHECKING(for isinf with <math.h>)
 AC_TRY_LINK([#include <math.h>], [float f = 0.0; isinf(f)],