On 20/07/16 15:13, David Edelsohn wrote: > On Wed, Jul 20, 2016 at 7:09 AM, Szabolcs Nagy <szabolcs.n...@arm.com> wrote: >> On 20/07/16 14:45, David Edelsohn wrote: >>>> Musl libc does not support gnu ifunc, so disable it by default. >>>> (not disabled on s390-* since that has no musl support yet.) >>> >>> Musl libc now supports PPC64. Support for s390 is in progress. >>> >> >> it seemed to me that on ppc64 ifunc is disabled by default. >> (at least it is not enabled in config.gcc) > > Ifunc is used on PPC64. >
only if you build gcc with --enable-gnu-indirect-function otherwise the ifunc attribute does not work, and target libs (e.g. libatomic on x86_64) don't use ifunc. in glibc i think you need --enable-multiarch to use ifunc, but it handles ifunc in user code independently of that. i just want to make sure that --enable-gnu-indirect-function is not the default with *-musl (since musl has no ifunc support).
