___darwin_check_fd_set_overflow in macOS builds #5210
Description
Lots of github CI jobs on macOS fail with this error message when linking sockfilt:
CCLD sockfilt
Undefined symbols for architecture x86_64:
"___darwin_check_fd_set_overflow", referenced from:
_main in sockfilt-sockfilt.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Seems to be a bug in Apple's Xcode 11.4: https://openradar.appspot.com/FB7647406