Fix non-x86 builds and approximately one million warnings
commit 3efe53a5:
meson: Don't error out when assembler type is unknown
We don't use an assembler for non-x86 builds
commit e8f02123:
avutil/mem: Fix invalid use of av_alloc_size
The alloc_size attribute is valid only on functions that return a
pointer. GCC 9 (not yet released) warns about invalid usage:
./libavutil/mem.h:342:1: warning: 'alloc_size' attribute ignored on a function returning int' [-Wattributes]
342 | av_alloc_size(2, 3) int av_reallocp_array(void *ptr, size_t nmemb, size_t size);
| ^~~~~~~~~~~~~
The mem.h
change is from upstream: https://patchwork.ffmpeg.org/patch/11148/