# HG changeset patch
# User Paolo Bonzini <bonzini@gnu.org>
# Date 1226408140 -3600
# Node ID 59bb86777cb979585bb039caa663ae4174e0c894
# Parent  0d9e838c523c9fbb642b0dda8170bdc4efd7b263
warnings: Think right.

2008-11-11  Paolo Bonzini  <bonzini@gnu.org>

	* m4/warnings.m4 (gl_WARN_ADD): Don't AC_SUBST the empty string.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2008-11-11  Paolo Bonzini  <bonzini@gnu.org>
+
+	* m4/warnings.m4 (gl_WARN_ADD): Don't AC_SUBST the empty string.
+
 2008-11-11  Paolo Bonzini  <bonzini@gnu.org>
 
 	* m4/warnings.m4 (gl_WARN_INIT): Substitute WARN_CFLAGS.
diff --git a/m4/warnings.m4 b/m4/warnings.m4
--- a/m4/warnings.m4
+++ b/m4/warnings.m4
@@ -47,5 +47,5 @@
 gl_AS_VAR_IF([gl_Warn], [yes], [gl_AS_VAR_APPEND([gl_Flags], [" $1"])])
 AS_VAR_POPDEF([gl_Flags])dnl
 AS_VAR_POPDEF([gl_Warn])dnl
-AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])dnl
+m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl
 ])