.POSIX:

CC ?= gcc
CFLAGS = -Wall -pedantic --std=c99 -O2
DBG_CFLAGS = -Wall -Werror -pedantic --std=c99 -O0 -g
SYSTEM != uname
LDFLAGS != if [ '${SYSTEM}' = 'Linux' ]; then echo '-lcrypt'; fi
PREFIX = /usr/local
MANPREFIX = ${PREFIX}/share/man

us: us.c

dbg:
	${CC} ${LDFLAGS} ${DBG_CFLAGS} us.c -o us

install: us
	mkdir -p ${DESTDIR}${PREFIX}/bin
	cp -f us ${DESTDIR}${PREFIX}/bin/us
	chown 0:0 ${DESTDIR}${PREFIX}/bin/us
	chmod 4755 ${DESTDIR}${PREFIX}/bin/us
#	mkdir -p ${DESTDIR}${MANPREFIX}/man1
#	cp -f us.1 ${DESTDIR}${MANPREFIX}/man1/us.1
#	chmod 644 ${DESTDIR}${MANPREFIX}/man1/us.1

uninstall:
	rm -f ${DESTDIR}${PREFIX}/bin/us
#		${DESTDIR}${MANPREFIX}/man1/us.1

clean:
	rm -f us us-dbg