From f84a2e26082943436e86c70bb309e50ffd7261bf Mon Sep 17 00:00:00 2001
From: rofl0r <rofl0r@users.noreply.github.com>
Date: Fri, 27 Aug 2021 03:17:11 +0000
Subject: [PATCH] configure.in: make XShm.h test compatible with modern
 autotools

https://www.gnu.org/software/autoconf/manual/autoconf-2.64/html_node/Present-But-Cannot-Be-Compiled.html
---
 configure.in | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/configure.in b/configure.in
index 6c21407..ed8d0a6 100644
--- a/configure.in
+++ b/configure.in
@@ -99,7 +99,13 @@ AC_PATH_X
 if test "$no_x" != "yes" ; then
 with_x=yes
 AC_CHECK_LIB(Xext, XShmCreateImage)
-AC_CHECK_HEADERS(sys/ipc.h sys/shm.h X11/extensions/XShm.h)
+AC_CHECK_HEADERS(sys/ipc.h sys/shm.h X11/Xlib.h X11/Xutil.h X11/keysym.h X11/extensions/XShm.h, [], [], [[
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/keysym.h>
+#define _SVID_SOURCE
+#define _XOPEN_SOURCE
+]])
 test "$x_includes" && XINCS="-I$x_includes"
 test "$x_libraries" && XLIBS="-L$x_libraries"
 else
-- 
2.11.4.GIT