From 04d84d16f07e4008964dd932b7e704e95b923d57 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sat, 19 Apr 2014 15:19:54 -0700
Subject: [PATCH] * configure.ac: Add comment explaining why HAVE_GLIB is
 different.

---
 configure.ac | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/configure.ac b/configure.ac
index 9096681d78c..8250d89b669 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3806,6 +3806,13 @@ AC_FUNC_FORK
 
 AC_CHECK_FUNCS(snprintf)
 
+dnl Check for glib.  This differs from other library checks in that
+dnl Emacs need not link to glib unless some other library is already
+dnl linking to glib.  Although glib provides no facilities that Emacs
+dnl needs for its own purposes, when glib is present Emacs needs to
+dnl use primitives like g_main_context_query to avoid clashing with
+dnl glib at a low level.
+dnl
 dnl Check this late, since it depends on $GTK_CFLAGS etc.
 XGSELOBJ=
 OLDCFLAGS="$CFLAGS"
-- 
2.39.2