Oh, seems like upstream already have this patch... Well, clang doesn't have -mcpu at all, there -march only, just for gcc compatibility.
26.03.2016, 23:37, "Reimar Döffinger" <reimar.doeffin...@gmx.de>: > On 26.03.2016, at 13:10, yukari yakumo <yukar...@yandex.ru> wrote: >> Hi everyone! >> I'm Gentoo Linux user and currently I play with Clang as default compiler. >> And currently I tried to build ffmpeg 2.8.6 with Clang 3.9.0 and >> `-march=native` in C(XX)FLAGS (ffmpeg-2.8.6.ebuild automatically convert >> this to `--cpu=host` configure flag). >> But I get `--cpu=host not supported with compiler clang` error on >> configure phase. It's seems like output of clang test compilation different >> from GCC's output. >> I make a little patch that you can find in attachment to fix this issue. >> This is very similar to GCC's check_native method. > > Is there a need for all that? > It's used for gcc because the gcc developers decided to randomly use -march > and -mcpu with no sense or system. > If -march=native always does the right thing for clang, just testing if it is > accepted should be enough? > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
