Index: ffmpeg-4.0/configure
===================================================================
--- ffmpeg-4.0.orig/configure	2018-05-22 18:16:53.554251617 +0300
+++ ffmpeg-4.0/configure	2018-05-22 18:16:53.550251592 +0300
@@ -6541,7 +6541,7 @@ if enabled icc; then
             disable aligned_stack
     fi
 elif enabled gcc; then
-    check_optflags -fno-tree-vectorize
+    # check_optflags -fno-tree-vectorize
     check_cflags -Werror=format-security
     check_cflags -Werror=implicit-function-declaration
     check_cflags -Werror=missing-prototypes