-# serial 2
+# serial 3
# From Paul Eggert.
# so you can't declare an object of that type.
# Check for this incompatibility with Standard C.
-# Include stdio.h first, because otherwise this test would fail on Linux
-# (at least 2.2.16) because the `_XOPEN_SOURCE 500' definition elicits
+# Include stdlib.h first, because otherwise this test would fail on Linux
+# (at least glibc-2.1.3) because the `_XOPEN_SOURCE 500' definition elicits
# a syntax error in wchar.h due to the use of undefined __int32_t.
AC_DEFUN(AC_MBSTATE_T_OBJECT,
[AC_CACHE_CHECK([for mbstate_t object type], ac_cv_type_mbstate_t_object,
- [AC_TRY_COMPILE([#include <stdio.h>
+ [AC_TRY_COMPILE([
+#if HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
#include <wchar.h>],
[mbstate_t x; return sizeof x;],
ac_cv_type_mbstate_t_object=yes,