-# include_next.m4 serial 7
+# include_next.m4 serial 8
dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
[gl_cv_have_include_next],
[rm -rf conftestd1 conftestd2
mkdir conftestd1 conftestd2
+ dnl The include of <stdio.h> is because IBM C 9.0 on AIX 6.1 supports
+ dnl include_next when used as first preprocessor directive in a file,
+ dnl but not when preceded by another include directive.
cat <<EOF > conftestd1/conftest.h
#define DEFINED_IN_CONFTESTD1
+#include <stdio.h>
#include_next <conftest.h>
#ifdef DEFINED_IN_CONFTESTD2
int foo;