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| author | Simon Josefsson <simon@josefsson.org> | 2008-11-04 09:46:21 +0100 |
|---|---|---|
| committer | Simon Josefsson <simon@josefsson.org> | 2008-11-04 09:46:21 +0100 |
| commit | b0db98bca89cc790389da95f0bdb1fe90d799e5d (patch) | |
| tree | 8e39e249ce4bd04b2d0564c24bbf04c8d666e037 /gl/m4/include_next.m4 | |
| parent | 55db9535ee8a1491503c02826dd8b060a11f45c9 (diff) | |
| download | libtasn1-b0db98bca89cc790389da95f0bdb1fe90d799e5d.tar.gz libtasn1-b0db98bca89cc790389da95f0bdb1fe90d799e5d.tar.bz2 libtasn1-b0db98bca89cc790389da95f0bdb1fe90d799e5d.zip | |
Update gnulib files. Use GFDLv1.3 for manual.
Diffstat (limited to 'gl/m4/include_next.m4')
| -rw-r--r-- | gl/m4/include_next.m4 | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/gl/m4/include_next.m4 b/gl/m4/include_next.m4 index b6e4d3a..c70c413 100644 --- a/gl/m4/include_next.m4 +++ b/gl/m4/include_next.m4 @@ -1,4 +1,4 @@ -# include_next.m4 serial 8 +# include_next.m4 serial 9 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, @@ -87,6 +87,7 @@ EOF AC_DEFUN([gl_CHECK_NEXT_HEADERS], [ AC_REQUIRE([gl_INCLUDE_NEXT]) + AC_REQUIRE([AC_CANONICAL_HOST]) AC_CHECK_HEADERS_ONCE([$1]) m4_foreach_w([gl_HEADER_NAME], [$1], @@ -105,11 +106,22 @@ AC_DEFUN([gl_CHECK_NEXT_HEADERS], [AC_LANG_SOURCE( [[#include <]]m4_dquote(m4_defn([gl_HEADER_NAME]))[[>]] )]) - dnl eval is necessary to expand ac_cpp. + dnl AIX "xlc -E" and "cc -E" omit #line directives for header files + dnl that contain only a #include of other header files and no + dnl non-comment tokens of their own. This leads to a failure to + dnl detect the absolute name of <dirent.h>, <signal.h>, <poll.h> + dnl and others. The workaround is to force preservation of comments + dnl through option -C. This ensures all necessary #line directives + dnl are present. GCC supports option -C as well. + case "$host_os" in + aix*) gl_absname_cpp="$ac_cpp -C" ;; + *) gl_absname_cpp="$ac_cpp" ;; + esac + dnl eval is necessary to expand gl_absname_cpp. dnl Ultrix and Pyramid sh refuse to redirect output of eval, dnl so use subshell. AS_VAR_SET([gl_next_header], - ['"'`(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD | + ['"'`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD | sed -n '\#/]m4_quote(m4_defn([gl_HEADER_NAME]))[#{ s#.*"\(.*/]m4_quote(m4_defn([gl_HEADER_NAME]))[\)".*#\1# s#^/[^/]#//&# |