From: Eric Blake <ebb9@byu.net>
Date: Tue, 12 Feb 2008 15:49:59 +0000 (-0700)
Subject: Avoid trailing space in config.h with AC_DEFINE([var], []).
X-Git-Tag: v2.62~65
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=49ffd6c9c13b0df14df1c42d56eaecac6bb246c2;p=thirdparty%2Fautoconf.git

Avoid trailing space in config.h with AC_DEFINE([var], []).

* lib/autoconf/general.m4 (_AC_DEFINE_Q): Explicitly mark empty
defines with a comment.

Signed-off-by: Eric Blake <ebb9@byu.net>
---

diff --git a/ChangeLog b/ChangeLog
index 4ee1cd46..8fe8873d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-02-12  Eric Blake  <ebb9@byu.net>
+
+	Avoid trailing space in config.h with AC_DEFINE([var], []).
+	* lib/autoconf/general.m4 (_AC_DEFINE_Q): Explicitly mark empty
+	defines with a comment.
+
 2008-02-08  Eric Blake  <ebb9@byu.net>
 
 	Fix texinfo typos in previous patch.
diff --git a/lib/autoconf/general.m4 b/lib/autoconf/general.m4
index 92483db3..645108e0 100644
--- a/lib/autoconf/general.m4
+++ b/lib/autoconf/general.m4
@@ -2056,7 +2056,7 @@ m4_cond([m4_index([$3], [
 m4_ifval([$4], [AH_TEMPLATE(AC_name, [$4])])dnl
 m4_popdef([AC_name])dnl
 cat >>confdefs.h <<$1_ACEOF
-[@%:@define] $2 m4_if($#, 2, 1, [$3])
+[@%:@define] $2 m4_if([$#], 2, 1, [$3], [], [/**/], [$3])
 _ACEOF
 ])