Created attachment 406176 [details] ssse3 is superset of sse2 (not sse3) Can't compile media-video/ffmpeg-2.6.3 as X86_CPU_REQUIRED_USE is set wrong in the ebuild. Example: For a fairly resent Intel cpu the following is correct setting. CPU_FLAGS_X86="mmx mmxext sse sse2 ssse3 sse4_1 sse4_2" However media-video/ffmpeg-2.6.3 (and all >2.6.0) require use of "sse3" to allow "ssse3". Unfortunately that's wrong as sse3 is NOT a subset of ssse3. sse2 is subset of sse3 and ssse3 but each of them contain commands that the other doesn't.
ffmpeg's configure has the following line: ssse3_deps="sse3" meaning that if you disable 'sse3' you also disable 'ssse3', so the ebuild is correct and you should actually get that line (and possibly the asm code if some of it rely on this assumption) changed upstream if you think this is wrong
(In reply to Alexis Ballier from comment #1) > ffmpeg's configure has the following line: > ssse3_deps="sse3" > > meaning that if you disable 'sse3' you also disable 'ssse3', so the ebuild > is correct and you should actually get that line (and possibly the asm code > if some of it rely on this assumption) changed upstream if you think this is > wrong Can see how this can be correct. I for one has CPU that supports among it flags sse2 and ssse3 but not sse3. Similarly, it supports sse but not mmxext which says that in real world ssse3 is disconnected with sse3 cat /proc/cpuinfo vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 Duo CPU L7100 @ 1.20GHz stepping : 11 ..... flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm ida dtherm tpr_shadow vnmi flexpriority so ffmpeg update is currently blocked for me with The following REQUIRED_USE flag constraints are unsatisfied: cpu_flags_x86_ssse3? ( cpu_flags_x86_sse3 ) cpu_flags_x86_sse? ( cpu_flags_x86_mmxext )
you do have sse3: equery uses ffmpeg says: cpu_flags_x86_sse3 : Use the SSE3 instruction set ([pni] in cpuinfo, NOT ssse3)
