PREFIX ?= /usr
BINDIR ?= $(PREFIX)/bin
CC ?= gcc

CFLAGS ?= -O2 -Wall -Wextra -Wpedantic -std=gnu99 -I./include
LDFLAGS ?= -Wl,-z,relro,-z,now -Wl,-z,noexecstack -Wl,-z,separate-code -pie
LDLIBS ?= -lsystemd

SRCDIR = src
OBJDIR = obj

SRCS = $(wildcard $(SRCDIR)/*.c)
OBJS = $(patsubst $(SRCDIR)/%.c,$(OBJDIR)/%.o,$(SRCS))

BIN = sin

.PHONY: all clean install test dirs

all: dirs $(BIN)

dirs:
	@mkdir -p $(OBJDIR)

fmt:
	clang-format -i src/*.c

$(BIN): $(OBJS)
	$(CC) $(LDFLAGS) -o $@ $^ $(LDLIBS)

$(OBJDIR)/%.o: $(SRCDIR)/%.c
	$(CC) $(CFLAGS) -c -o $@ $<

install: $(BIN)
	install -d $(DESTDIR)$(BINDIR)
	install -m 0755 $(BIN) $(DESTDIR)$(BINDIR)/$(BIN)

clean:
	-rm -rf $(OBJDIR) $(BIN)

test: $(BIN)
	./$(BIN) --version