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rc/sh/pre

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#!/usr/bin/env sh
# YES_ZSH
# YES_BASH
# YES_DASH
pre() { ### @-
### dump all the `#define`s that `$CC $CPPFLAGS $CFLAGS $LDFLAGS` would result in.
###
### **TODO:** restore examples.
if [ -n "${ZSH_VERSION:-}" ]; then
${CC:-gcc} -dM -E - $=CPPFLAGS $=CFLAGS $=LDFLAGS < /dev/null
else
${CC:-gcc} -dM -E - $CPPFLAGS $CFLAGS $LDFLAGS < /dev/null
fi
}
[ "${SOURCING:-0}" -gt 0 ] || pre "$@"