James Hilliard <james.hillia...@gmail.com> writes: > On Thu, Nov 19, 2020 at 6:04 PM Tom Lane <t...@sss.pgh.pa.us> wrote: >> The cases we've got in the buildfarm are Xcode 12.0 on Catalina (10.15.7) >> and Xcode 12.2 on Big Sur (11.0.1 ... although that one is ARM not Intel). >> Maybe you're found some corner case in between those, but I guess it's >> more likely due to a configuration choice.
> I guess to verify one could try compiling with Xcode 12.2 on catalina 10.15.7. To check this, I updated my laptop (still on Catalina 10.15.7) to latest Xcode, 12.2 (12B45b), from 12.0 --- and behold, I could duplicate it: Undefined symbols for architecture x86_64: "___darwin_check_fd_set_overflow", referenced from: _ClientAuthentication in auth.o _pgstat_init in pgstat.o _ServerLoop in postmaster.o ld: symbol(s) not found for architecture x86_64 However ... it then occurred to me to blow away my ccache and accache, and after rebuilding from scratch, everything's fine. So, are you using ccache? regards, tom lane