Ack… please don’t do this. It will break if you’re cross-compiling binaries for a different OS than the OS you’re building on. If you want to do per-OS config

Ack… please don’t do this. It will break if you’re cross-compiling binaries for a different OS than the OS you’re building on. If you want to do per-OS configuration in a Makefile or some type of configure step, that’s fine – but you should do it either based on a target triple (--host in autoconf-speak) which can be overridden by the user, or by running the given compiler on test programs and checking the output (like autoconf does, but ideally with one or two tests rather than a bazillion of them).