From 773d52162e92530d5d0639caa804c56f42f0e8ab Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Thu, 20 Oct 2016 19:54:06 +0200
Subject: build: add required failure message for libavfilter check

If req==True, a fmsg must be set (apparently).

Fixes #3692, probably.
---
 wscript | 1 +
 1 file changed, 1 insertion(+)

diff --git a/wscript b/wscript
index 9fa00b01f0..b347364d2c 100644
--- a/wscript
+++ b/wscript
@@ -430,6 +430,7 @@ FFmpeg/Libav libraries. You need at least {0}. Aborting.".format(libav_versions_
         'desc': 'libavfilter',
         'func': check_pkg_config('libavfilter', '>= 5.0.0'),
         'req':  True,
+        'fmsg': 'libavfilter is a required dependency.',
     }, {
         'name': '--libavdevice',
         'desc': 'libavdevice',
-- 
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