reduce autoconf warnings

[Eric Blake]

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When running with 'autoconf -Wall', gnulib generates very noisy output.
I'm not touching the AC_TRY_LINK vs AC_LINK_IFELSE issue (as I know that
Bruno already has strong feelings about continuing to use the deprecated
interface).  But this fixes other issues that are less controversial,
using the fact that gnulib requires autoconf 2.59.  AC_FOREACH wasn't
replaced by m4_foreach_w until 2.60, but gnulib-tool guarantees
m4_foreach_w even for 2.59, so that change was safe.  And AS_HELP_STRING
was already available in 2.59.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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>From 90f8d0d3e4ce4b1f4118d35eba6a051558323ace Mon Sep 17 00:00:00 2001
From: Eric Blake <address@hidden>
Date: Wed, 9 Apr 2008 06:42:08 -0600
Subject: [PATCH] Avoid some autoconf warnings.

* m4/regex.m4 (gl_REGEX): s/AC_HELP_STRING/AS_HELP_STRING/.
* m4/include_next.m4 (gl_INCLUDE_NEXT): s/AC_FOREACH/m4_foreach_w/.

Signed-off-by: Eric Blake <address@hidden>
---
 ChangeLog          |    6 ++++++
 m4/include_next.m4 |    4 ++--
 m4/regex.m4        |    4 ++--
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 3461092..64704e5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-04-09  Eric Blake  <address@hidden>
+
+       Avoid some autoconf warnings.
+       * m4/regex.m4 (gl_REGEX): s/AC_HELP_STRING/AS_HELP_STRING/.
+       * m4/include_next.m4 (gl_INCLUDE_NEXT): s/AC_FOREACH/m4_foreach_w/.
+
 2008-04-08  Eric Blake  <address@hidden>
 
        Use 'git describe --match' if present (added in git 1.5.5).
diff --git a/m4/include_next.m4 b/m4/include_next.m4
index 7c08e93..a842e2a 100644
--- a/m4/include_next.m4
+++ b/m4/include_next.m4
@@ -1,4 +1,4 @@
-# include_next.m4 serial 5
+# include_next.m4 serial 6
 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,
@@ -71,7 +71,7 @@ AC_DEFUN([gl_CHECK_NEXT_HEADERS],
   AC_REQUIRE([gl_INCLUDE_NEXT])
   AC_CHECK_HEADERS_ONCE([$1])
 
-  AC_FOREACH([gl_HEADER_NAME], [$1],
+  m4_foreach_w([gl_HEADER_NAME], [$1],
     [AS_VAR_PUSHDEF([gl_next_header],
                    [gl_cv_next_]m4_quote(m4_defn([gl_HEADER_NAME])))
      if test $gl_cv_have_include_next = yes; then
diff --git a/m4/regex.m4 b/m4/regex.m4
index 4879bd8..656cef7 100644
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -1,4 +1,4 @@
-#serial 49
+#serial 50
 
 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005,
 # 2006, 2007, 2008 Free Software Foundation, Inc.
@@ -17,7 +17,7 @@ AC_DEFUN([gl_REGEX],
   AC_CHECK_HEADERS_ONCE([locale.h])
 
   AC_ARG_WITH([included-regex],
-    [AC_HELP_STRING([--without-included-regex],
+    [AS_HELP_STRING([--without-included-regex],
                    [don't compile regex; this is the default on 32-bit
                     systems with recent-enough versions of the GNU C
                     Library (use with caution on other systems).
-- 
1.5.4