From 4e884a71bcccab4bd6768dc85bb159368a1b8e29 Mon Sep 17 00:00:00 2001
From: Lukas Rucka <xrucka@fi.muni.cz>
Date: Wed, 6 Jun 2018 10:50:30 +0200
Subject: [PATCH] BUILD: do not build hwaccel module, if empty

---
 configure.ac | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 22cb28d67..75556a739 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2577,7 +2577,10 @@ then
         HW_ACC_OBJ="${HW_ACC_OBJ} src/hwaccel_vaapi.o"
 fi
 
-ADD_MODULE("hw_accel", "$HW_ACC_OBJ", "$LAVC_HWACC_LIBS")
+if test -n "$HW_ACC_OBJ"
+then
+        ADD_MODULE("hw_accel", "$HW_ACC_OBJ", "$LAVC_HWACC_LIBS")
+fi
 
 if test $lavc_hwacc_vdpau_req = yes -a $lavc_hwacc_vdpau = no; then
 	AC_MSG_ERROR([Could not find hwacc vdpau dependencies!]);