Makefile

Makefile

@@ -0,0 +1,33 @@
+CFLAGS_FILE?=.cflags
+COMPILE_TEST_FILE?=.test.c
+PREFIX?=/usr/local
+
+all: cvpn
+
+cvpn: $(CFLAGS_FILE) Makefile src/vpn.c src/charm.c src/os.c include/charm.h include/vpn.h include/os.h
+	$(CC) $$(cat "$(CFLAGS_FILE)") $(OPTFLAGS) -Iinclude -o $@ src/vpn.c src/charm.c src/os.c
+	strip $@
+
+install: cvpn
+	install -d $(PREFIX)/sbin
+	install -m 0755 cvpn $(PREFIX)/sbin
+
+uninstall:
+	rm -f $(PREFIX)/sbin/cvpn
+
+clean:
+	rm -f cvpn *~ $(CFLAGS_FILE) $(COMPILE_TEST_FILE)
+
+$(CFLAGS_FILE):
+	@CFLAGS="$(CFLAGS)"
+	@if [ -z "$$CFLAGS" ]; then \
+		if [ ! -r "$(CFLAGS_FILE)" ]; then \
+			echo "int main(void) { return 0; }" > "$(COMPILE_TEST_FILE)"; \
+			for flag in -march=native -mtune=native -Ofast -Wno-unused-command-line-argument; do \
+				$(CC) $${CFLAGS} $${flag} "$(COMPILE_TEST_FILE)" >/dev/null 2>&1 && CFLAGS="$$CFLAGS $$flag"; \
+			done; \
+			rm -f a.out \
+			CFLAGS="$${CFLAGS} -Wall -W -Wshadow -Wmissing-prototypes"; \
+		fi \
+	fi; \
+	echo "$$CFLAGS" > "$(CFLAGS_FILE)"