rc/sh/pre

#!/usr/bin/env bash
if [ -n "${ZSH_VERSION:-}" ]; then
    ${CC:-gcc} -dM -E - $=CPPFLAGS $=CFLAGS $=LDFLAGS < /dev/null
else
    ${CC:-gcc} -dM -E - $CPPFLAGS $CFLAGS $LDFLAGS < /dev/null
fi