ping! I've got the world building on gcc + mips32 just patching cxx_contention_t to be 32 bits, but it looks like an ABI change.
Would the better thing be to just make it 32 bits on FreeBSD + MIPS for now? I don't think anyone is going to mind that changing at this point. -adrian On Sat, 3 Oct 2020 at 13:35, Adrian Chadd <adr...@freebsd.org> wrote: > > > On Mon, 21 Sep 2020 at 00:43, Alexander Richardson < > arichard...@freebsd.org> wrote: > >> >> On Mon, 21 Sep 2020, 07:38 Adrian Chadd, <adr...@freebsd.org> wrote: >> >>> So, the big list of unknown symbols was my fault! Whoops. >>> >>> i've gotten further using gcc-6.4 by fixing some of the warnings/issues >>> that have crept up. >>> >>> Here's a review for one of them: >>> >>> https://reviews.freebsd.org/D26504 >>> >>> However, now I've hit: >>> >>> /usr/local/bin/mips-unknown-freebsd13.0-ld: >>> >>> /usr/home/adrian/work/freebsd/head-embedded/obj/mips_ap/usr/home/adrian/work/freebsd/head-embedded/src/mips.mips/tmp/usr/lib/libc++.so.1: >>> undefined reference to `__atomic_fetch_sub_8' >>> /usr/local/bin/mips-unknown-freebsd13.0-ld: >>> >>> /usr/home/adrian/work/freebsd/head-embedded/obj/mips_ap/usr/home/adrian/work/freebsd/head-embedded/src/mips.mips/tmp/usr/lib/libc++.so.1: >>> undefined reference to `__atomic_load_8' >>> /usr/local/bin/mips-unknown-freebsd13.0-ld: >>> >>> /usr/home/adrian/work/freebsd/head-embedded/obj/mips_ap/usr/home/adrian/work/freebsd/head-embedded/src/mips.mips/tmp/usr/lib/libc++.so.1: >>> undefined reference to `__atomic_fetch_add_8' >>> >>> .. looks like we need some 64 bit atomics now in mips32 for libc++ / devd >>> >> >> Those are now provided by compiler-rt when using clang. With GCC you'll >> have to link libatomic. I had a quick look at the code in libc++ that uses >> the 64-bit atomics a few weeks ago and I believe it's the futex fallback >> code. The best solution would probably be to port it to use umtx but for >> MIPS32 it might be fine to use a 32 bit atomic instead. >> > > It compiled fine with a 32 bit atomic. Why's it 64 bit for everything but > Linux? > > Can we make it a 32 bit atomic for all FreeBSD platforms? Are there ABI > concerns? > > > > -adrian > > >> >> Alex >> >>> _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
