fix(example2): skip build example2 in windows

skip build example2 in windows

Signed-off-by: jokemanfire <hu.dingyang@zte.com.cn>

Author: jokemanfire

example2/Makefile

@@ -1,21 +1,27 @@
-export PROTOC=${HOME}/protoc/bin/protoc
-
 #
 # Build
 #
 
 .PHONY: build
 build:
+ifeq ($(OS),Windows_NT)
+	@echo "Skipping build on Windows"
+else
 	cargo build
+endif
 
 .PHONY: build-examples
 build-examples: build
+ifeq ($(OS),Windows_NT)
+	@echo "Skipping build-examples on Windows"
+else
 	cargo build --example server
 	cargo build --example client
 	cargo build --example async-server
 	cargo build --example async-client
 	cargo build --example async-stream-server
 	cargo build --example async-stream-client
+endif
 
 .PHONY: deps
 deps: