From 11b63facd52ddf77f73facff164df1f171e3511e Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: Mon, 2 Mar 2020 15:14:02 -0800
Subject: [PATCH] Prevent Mesa from including X11 headers if X11 is disabled
 This fixes compilation errors that occur when trying to compile SDL2 for a
 X11-less target. The errors were due to the fact that Mesa will include X11
 headers unless a couple of macros are defined.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
 configure.ac | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/configure.ac b/configure.ac
index 7ace411a7..19361a4b8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2035,6 +2035,9 @@ AS_HELP_STRING([--enable-video-x11-vm], [use X11 VM extension for fullscreen [[d
                 SUMMARY_video_x11="${SUMMARY_video_x11} xvidmode"
             fi
         fi
+    else
+        # Prevent Mesa from including X11 headers
+        EXTRA_CFLAGS="$EXTRA_CFLAGS -DMESA_EGL_NO_X11_HEADERS -DEGL_NO_X11"
     fi
 }