move c binding into separate dir

examples/lang_c/Makefile

@@ -2,24 +2,21 @@ ROOT_DIR := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))
 OUT_DIR := ${ROOT_DIR}/out
 
 SP2_DIR := ${ROOT_DIR}/../../servicepoint2
-SP2_INCLUDE := ${SP2_DIR}/include
+SP2_INCLUDE := ${ROOT_DIR}/../../servicepoint2-binding-c
 SP2_TARGET_RELEASE := ${ROOT_DIR}/../../target/release
 
-.PHONY: clean
+.PHONY: build run clean
+
+build: ${OUT_DIR}/lang_c
 
 run: ${OUT_DIR}/lang_c
 	out/lang_c
 
-all: ${OUT_DIR}/lang_c
-
-${OUT_DIR}/lang_c: ${SP2_TARGET_RELEASE} main.c
-	mkdir -p ${OUT_DIR}
-	gcc main.c -I ${SP2_INCLUDE} -L ${SP2_TARGET_RELEASE} -Wl,-Bstatic -lservicepoint2 -Wl,-Bdynamic -o ${OUT_DIR}/lang_c
-
-${SP2_TARGET_RELEASE}:
-	cd ${SP2_DIR} && cargo build --release --all-features
-
 clean:
-	rm -r ${SP2_INCLUDE_DIR} || true
 	rm -r ${OUT_DIR} || true
-	rm -r ${SP2_TARGET_RELEASE} || true
+	rm -r ${SP2_TARGET_RELEASE} || true
+
+${OUT_DIR}/lang_c: main.c
+	cd ${SP2_DIR} && cargo build --release --all-features
+	mkdir -p ${OUT_DIR}
+	gcc main.c -I ${SP2_INCLUDE} -L ${SP2_TARGET_RELEASE} -Wl,-Bstatic -lservicepoint2 -Wl,-Bdynamic -o ${OUT_DIR}/lang_c

servicepoint2-binding-c/generate.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+
+# if the script crashes here, run `cargo install cbindgen`
+cbindgen --config cbindgen.toml --clean --output servicepoint2.h ../servicepoint2

servicepoint2/generate-include

@@ -1,5 +0,0 @@
-#!/usr/bin/env sh
-rm -r include || true
-
-# if the script crashes here, run `cargo install cbindgen`
-cbindgen --config cbindgen.toml --clean --output include/servicepoint2.h