On 20 March 2016 at 19:20, Sean Bruno <sbr...@freebsd.org> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA512 > > aarch64 targets are now failing to build on i386 hosts due to missing > __atomic_load_8() calls since this commit: > > https://github.com/qemu/qemu/commit/a0aa44b488b3601415d55041e4619aef5f3a4ba8#diff-c143d686899ae51d7b927d9c682e12fd > > I'm unsure if Linux is disabling aarch64 targets for i386 hosts or if > this commit works "just fine" on Linux hosts right now, as it doesn't > work with clang or gcc.
I think it just works on most Linux 32-bit architectures because the compiler support can inline a suitable atomic op (there is one case where it doesn't, which I think is PPC32). In any case, we mustn't use atomics on types larger than the host pointer type, because it's not portable enough. Paolo or Alex, can you have a look at this? thanks -- PMM
