James Hilliard <james(dot)hilliard1(at)gmail(dot)com> writes:
> It would appear weak symbol linking is not handled properly without
> 'isysroot' parameter passed to linker.
Nobody else has reported this problem, so maybe you should tell us
how to reproduce it before you suggest a build process change.
(And yes, we have buildfarm members testing Xcode > 11.4 ...)
regards, tom lane