From f54e555d27ba4e2bf2209002a8f1582cd5837f33 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Sun, 1 May 2016 20:15:53 +0200
Subject: wscript: make at least 1 OpenGL output mandatory

You have to explicitly disable it if you really want to compile without
it (like with libass).
---
 wscript | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/wscript b/wscript
index 061b14ee61..d4f84e13b4 100644
--- a/wscript
+++ b/wscript
@@ -816,7 +816,11 @@ video_output_features = [
         'desc': 'OpenGL video outputs',
         'deps_any': [ 'gl-cocoa', 'gl-x11', 'egl-x11', 'egl-drm',
                       'gl-win32', 'gl-wayland', 'rpi', 'plain-gl' ],
-        'func': check_true
+        'func': check_true,
+        'req': True,
+        'fmsg': "Unable to find OpenGL header files for video output. " +
+                "Aborting. If you really mean to compile without OpenGL " +
+                "video outputs use --disable-gl."
     }, {
         'name': 'egl-helpers',
         'desc': 'EGL helper functions',
-- 
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