simplify example

example/Makefile

@@ -0,0 +1,30 @@
+CC := gcc
+
+THIS_DIR := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))
+REPO_ROOT := $(THIS_DIR)/..
+
+build: out/example
+
+clean:
+	rm -r out || true
+	rm include/servicepoint.h || true
+	cargo clean
+
+run: out/example
+	out/example
+
+PHONY: build clean dependencies run
+
+out/example: dependencies main.c
+	mkdir -p out || true
+	${CC} main.c \
+		-I $(REPO_ROOT)/include \
+		-L $(REPO_ROOT)/target/release \
+		-Wl,-Bstatic -lservicepoint_binding_c \
+		-Wl,-Bdynamic -llzma \
+		-o out/example
+
+dependencies: FORCE
+	cargo build --manifest-path=$(REPO_ROOT)/Cargo.toml --release
+
+FORCE: ;