[PATCH] * m4/gnulib-common.m4: Fix comment.

[Paul Eggert]

---
 m4/gnulib-common.m4 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index 30911d1581..8a5daa230e 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -313,7 +313,8 @@ AC_DEFUN([gl_COMMON_BODY], [
 #else
 # define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED
 #endif
-/* Alternative spelling of this macro, for convenience.  */
+/* Alternative spelling of this macro, for convenience and for
+   compatibility with glibc/include/libc-symbols.h.  */
 #define _GL_UNUSED _GL_ATTRIBUTE_MAYBE_UNUSED
 /* Earlier spellings of this macro.  */
 #define _UNUSED_PARAMETER_ _GL_ATTRIBUTE_MAYBE_UNUSED
-- 
2.37.2