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diff --git a/gl/m4/include_next.m4 b/gl/m4/include_next.m4
index 062753c5880836337e46cb4144a691653421b4f5..d6101fe328370e91f7cab9c937a634ec17d31d6b 100644 (file)
--- a/gl/m4/include_next.m4
+++ b/gl/m4/include_next.m4
-# include_next.m4 serial 10
-dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
+# include_next.m4 serial 12
+dnl Copyright (C) 2006-2009 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
[gl_cv_have_include_next],
[rm -rf conftestd1a conftestd1b conftestd2
mkdir conftestd1a conftestd1b 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. Additionally,
- dnl with this same compiler, include_next is a no-op when used in a
- dnl header file that was included by specifying its absolute file name.
- dnl Despite these two bugs, include_next is used in the compiler's
- dnl <math.h>. By virtue of the second bug, we need to use include_next
- dnl as well in this case.
+ dnl IBM C 9.0, 10.1 (original versions, prior to the 2009-01 updates) on
+ dnl AIX 6.1 support include_next when used as first preprocessor directive
+ dnl in a file, but not when preceded by another include directive. Check
+ dnl for this bug by including <stdio.h>.
+ dnl Additionally, with this same compiler, include_next is a no-op when
+ dnl used in a header file that was included by specifying its absolute
+ dnl file name. Despite these two bugs, include_next is used in the
+ dnl compiler's <math.h>. By virtue of the second bug, we need to use
+ dnl include_next as well in this case.
cat <<EOF > conftestd1a/conftest.h
#define DEFINED_IN_CONFTESTD1
#include_next <conftest.h>