ffmpeg-3.4.2 can compile with graphite and lto enabled #103
Description
My USE flags are very stripped down, encoding and all the other jazz is disabled, so I could imagine results might differ on a more complete ffmpeg, but nonetheless it's worth noting.
These are my USE flags: X, alsa, aes, mmx, mmxext, sse ,sse2 ,sse3, sse4_1, sse4_2, ssse3, gpl, hardcoded-tables, iconv, libass, libdrm, mp3, network, opengl, sdl, threads, truetype, vaapi, vorbis, xcb, xvid, zlib.
I used the cflags from your make.conf plus -ffast-math. There is a minor but nonetheless real improvement from enabling graphite and lto here. A particularly intense 3 minute segment of video which consistently dropped around 160 frames in MPV prior to recompiling with lto and graphite now only drops 140. If there are indeed issues with compiling a full ffmpeg with grapite and lto, they obviously should be disabled by default. But it might be worth commenting in that it can work with them, as it can be a noticable improvement for people with trash hardware like me.