diff options
Diffstat (limited to 'gl/m4/include_next.m4')
| -rw-r--r-- | gl/m4/include_next.m4 | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/gl/m4/include_next.m4 b/gl/m4/include_next.m4 index 062753c5..d6101fe3 100644 --- a/gl/m4/include_next.m4 +++ b/gl/m4/include_next.m4 @@ -1,5 +1,5 @@ -# 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. @@ -32,14 +32,15 @@ AC_DEFUN([gl_INCLUDE_NEXT], [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> |