Bug: https://bugs.gentoo.org/782553

--- ffmpeg-4.4.4/tools/cl2c.orig        2024-03-14 04:53:45.468507151 +0300
+++ ffmpeg-4.4.4/tools/cl2c     2024-03-14 04:54:53.503086088 +0300
@@ -24,6 +24,7 @@

 name=$(basename "$input" | sed 's/.cl$//')

+mkdir -p "$(dirname "$output")"
 cat >$output <<EOF
 // Generated from $input
 const char *ff_opencl_source_$name =