On Sun, 9 Aug 2020 15:36:51 +0400 Gleb Popov <[email protected]> wrote: > On Sat, Aug 8, 2020 at 5:30 PM Konstantin Belousov <[email protected]> > wrote: >> For code generated by gcc or clang, yes. >> If the reference to the symbol was generated by ghc, then I do not know. > > This doesn't seem to work. > > The code referencing __atomic_load_n() is C and GHC buildsystem already > passes -march=i686. Still, the problem persists. > Interestingly, 12.1-RELEASE-p2 doesn't have this problem, but > 12.1-RELEASE-p7 does. > > What library provides these symbols when clang is used? And I'm a bit > obscured how -march flag can affect these symbols' visibility at all?
There is no such library. i586 supports 64 bit atomic operations so the compiler should emit instructions for that instead of a function call. Check that *.o files that match "__atomic_load" are in fact built with -march. 12.1-RELEASE-p7 probably has a newer clang that fixed an issue where the compiler would always emit instructions, even for i386 and i486. _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-toolchain To unsubscribe, send any mail to "[email protected]"
