From 098add06eb7d742ff0e6ee0e294931a93a60c71c Mon Sep 17 00:00:00 2001
From: Robert Pluim <rpluim@gmail.com>
Date: Tue, 21 Feb 2023 18:21:56 +0100
Subject: Say whether we're using X11 double buffering

* configure.ac (EMACS_CONFIG_FEATURES): Output value of HAVE_XDBE.
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index c44165fb5c1..e1fcf1254df 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6637,6 +6637,7 @@ AC_DEFINE_UNQUOTED([EMACS_CONFIG_FEATURES], ["${emacs_config_features}"],
   [Summary of some of the main features enabled by configure.])
 
 AS_ECHO(["  Does Emacs use -lXaw3d?                                 ${HAVE_XAW3D}
+  Does Emacs use X11 double buffering?                    ${HAVE_XDBE}
   Does Emacs use -lXpm?                                   ${HAVE_XPM}
   Does Emacs use -ljpeg?                                  ${HAVE_JPEG}
   Does Emacs use -ltiff?                                  ${HAVE_TIFF}
-- 
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