# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1258913254 -3600
# Node ID 90584cfd31a4077a9eda25cfb5f9a3b43e1c0de2
# Parent  d6110537824ba3acc4abbc5b95768316c103312b
Add comment.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2009-11-22  Bruno Haible  <bruno@clisp.org>
+
+	diffseq: Add comment.
+	* lib/diffseq.h (IF_LINT): Add comment about pitfall.
+
 2009-11-22  Jim Meyering  <meyering@redhat.com>
 
 	c-stack: avoid defining an unused static function
diff --git a/lib/diffseq.h b/lib/diffseq.h
--- a/lib/diffseq.h
+++ b/lib/diffseq.h
@@ -68,7 +68,8 @@
 # define EARLY_ABORT(ctxt) false
 #endif
 
-/* Use this to suppress gcc's `...may be used before initialized' warnings. */
+/* Use this to suppress gcc's `...may be used before initialized' warnings.
+   Beware: The Code argument must not contain commas.  */
 #ifndef IF_LINT
 # ifdef lint
 #  define IF_LINT(Code) Code