#!/bin/sh

# Copyright (c) 2023–2024 Emma Tebibyte <emma@tebibyte.media>
# SPDX-License-Identifier: FSFAP
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice and this
# notice are preserved.  This file is offered as-is, without any warranty.

set -e

CFLAGS='-Lbuild/lib -idirafter include -O3'
RUSTFLAGS='-Copt-level=z -Ccodegen-units=1 -Cpanic=abort -Clto=y \
	-Cstrip=symbols -Ctarget-cpu=native \
	--extern sysexits=build/o/libsysexits.rlib'

if [ "$1" = "clean" ]; then
	rm *.mk || true
	exit 0
fi

while test -n "$1"; do
	case "$1" in
		clang)
			CFLAGS="$CFLAGS -Wall"
			;;
		gcc)
			CFLAGS="$CFLAGS -s -Wl,-z,noseparate-code,-z,nosectionheader -flto"
			;;
		'rustc +nightly')
			RUSTFLAGS="+nightly -Zlocation-detail=none $RUSTFLAGS"
			;;
		*)
			printf 'Usage: %s [clean | compiler]\n' "$0"
			exit 64 # sysexits.h(3) EX_USAGE
			;;
	esac

	shift
done

printf 'CFLAGS=%s\n' "$CFLAGS" >cc.mk
printf 'RUSTFLAGS=%s\n' "$RUSTFLAGS" >rustc.mk