3 # Note: Darwin is the original code name for macOS, also known as OS X.
4 # We still use "darwin" as the port name, partly because config.guess does.
6 # Select appropriate semaphore support. Darwin 6.0 (macOS 10.2) and up
7 # support System V semaphores; before that we have to use named POSIX
8 # semaphores, which are less good for our purposes because they eat a
9 # file descriptor per backend per max_connection slot.
12 USE_NAMED_POSIX_SEMAPHORES=1