Improve the AIX size_t size detection test

diff --git a/configure.in b/configure.in
index 1b7bf3475c439133a6e8aee6cacecc57370c0873..e4682d507458f38ad2ea413796f7a5ae1c3f05aa 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -787,7 +787,7 @@ dnl
 if test $ac_cv_sizeof_size_t = $ac_cv_sizeof_int &&
    test $ac_cv_sizeof_size_t = $ac_cv_sizeof_long ; then
   GLIB_CHECK_COMPILE_WARNINGS([
-#ifdef _AIX
+#if defined(_AIX) && !defined(__GNUC__)
 #pragma options langlvl=stdc89
 #endif
 #include <stddef.h>