Add compat for RHEL-5 autoconf

ChangeLog

+Tue Apr 29 11:54:28 EST 2008 Daniel P. Berrange <berrange@redhat.com>
+
+	* configure.in: Add compatability macros AC_CHECK_*_ONCE for
+	older autoconf (RHEL-5 vintage)
+
 Tue Apr 29 08:13:28 EST 2008 Daniel P. Berrange <berrange@redhat.com>
 
 	* src/qemu_conf.c, src/qemu_conf.h, src/xend_internal.c,

configure.in

@@ -41,6 +41,17 @@ m4_ifndef([m4_foreach_w],
   [m4_define([m4_foreach_w],
     [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])])
 
+dnl Compatability macros for RHEL-5 era autoconf
+m4_ifndef([AC_CHECK_HEADERS_ONCE],
+  [m4_define([AC_CHECK_HEADERS_ONCE],
+    [AC_CHECK_HEADERS([$1])])])
+m4_ifndef([AC_CHECK_DECLS_ONCE],
+  [m4_define([AC_CHECK_DECLS_ONCE],
+    [AC_CHECK_DECLS([$1])])])
+m4_ifndef([AC_CHECK_FUNCS_ONCE],
+  [m4_define([AC_CHECK_FUNCS_ONCE],
+    [AC_CHECK_FUNCS([$1])])])
+
 gl_EARLY
 gl_INIT