fix example path

examples/lang_c/Makefile

@@ -0,0 +1,34 @@
+CC := gcc
+
+THIS_DIR := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))
+REPO_ROOT := $(THIS_DIR)/../../
+
+build: out/lang_c
+
+clean:
+	rm -r out || true
+	rm include/servicepoint.h || true
+	cargo clean
+
+run: out/lang_c
+	out/lang_c
+
+PHONY: build clean dependencies run
+
+out/lang_c: dependencies src/main.c
+	mkdir -p out || true
+	${CC} src/main.c \
+		-I include \
+		-L $(REPO_ROOT)/target/release \
+		-Wl,-Bstatic -lservicepoint_binding_c \
+		-Wl,-Bdynamic -llzma \
+		-o out/lang_c
+
+dependencies: FORCE
+	mkdir -p include || true
+	# generate servicepoint header and binary to link against
+	SERVICEPOINT_HEADER_OUT=$(THIS_DIR)/include cargo build \
+		--manifest-path=$(REPO_ROOT)/Cargo.toml \
+		--release
+
+FORCE: ;