CC ?= cc
CFLAGS ?= -O2 -Wall -Wextra
PREFIX ?= /usr

all: {command}

{command}: hello.c
	$(CC) $(CFLAGS) -o $@ hello.c

install: {command}
	install -Dm755 {command} $(DESTDIR)$(PREFIX)/bin/{command}

clean:
	rm -f {command}

.PHONY: all install clean