How about that?
amd64 stable
ia64 stable
x86 stable
hppa stable
ppc/ppc64 stable
fails to compile on ARM. 2.6 is the last that compiles, 2.7 and 2.8 fail at the encoder target with errrors in PFX(pixel_avg_pp_32x64_neon)
arm stable, all arches done.