On Sun, 24 May 2020 20:25:11 +0000 (UTC) "Thomas Deutschmann" <whi...@gentoo.org> wrote:
> commit: 6e149596cc76f1bbcee6720828c8c8c92420f2a3 > Author: Thomas Deutschmann <whissi <AT> gentoo <DOT> org> > AuthorDate: Sun May 24 19:47:08 2020 +0000 > Commit: Thomas Deutschmann <whissi <AT> gentoo <DOT> org> > CommitDate: Sun May 24 20:23:53 2020 +0000 > URL: > https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=6e149596 > > media-libs/x265: drop USE=pic > > Gentoo's toolchain uses PIC by default. Since USE=asm was added, > we no longer need a USE flag to control that behavior. You got it wrong here it seems: USE=pic does not control whether the toolchain produces PIC or not. Shared libs always are, and have always been, built that way on Gentoo. In this case, USE=pic means "no matter what it costs, I do not want textrels", for the cases of hand written assembly that has to be rewritten to support PIC. And, still in this case, this costs a lot of performance, so it is enabled by default on hardened profiles and not others. Textrels work fine (on some architectures), they disallow W^X and force each process using the shared lib to make a "copy" at runtime in order to resolve relocations, so are not desirable but sometimes the cost outweights the gain. Plus, profiles/features/hardened enables pic by default but knows nothing about USE=asm so this is a regression for them. Alexis.
