引入poco库，基于mac-c++

所有的步骤参考https://github.com/pocoproject/poco
需要提前安装openssl

brew install openssl

拉poco代码

# 编译
git clone -b master https://github.com/pocoproject/poco.git
cd poco
mkdir cmake-build
cd cmake-build
cmake ..
cmake --build . --config Release
# 安装
sudo cmake --build . --target install

去/usr/local/include/查看是否有Poco，
去/usr/local/lib/下查看是否有libPoco*
有则安装成功

项目引入待补充