增加 readme
diff --git a/Makefile b/Makefile
index d030da8..9ecdece 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,8 @@
 CARGO ?=cargo
 RM ?=rm
+NDK ?= $(ANDROID_NDK)
+ANDROID_ARM64_STRIP ?= $(shell $(NDK)/ndk-which --abi arm64-v8a strip)
+ANDROID_ARM_STRIP ?= $(shell $(NDK)/ndk-which --abi armeabi-v7a strip)
 
 .PHONY: clean
 
@@ -9,7 +12,9 @@
 
 android:
 	$(CARGO) build --target aarch64-linux-android --release
+	$(ANDROID_ARM64_STRIP) target/aarch64-linux-android/release/libdlsmk.so
 	$(CARGO) build --target armv7-linux-androideabi --release
+	$(ANDROID_ARM_STRIP) target/armv7-linux-androideabi/release/libdlsmk.so