brew安装不了
https://github.com/EOSIO/eosio.cdt
$ brew tap eosio/eosio.cdt
$ brew install eosio.cdt
用源码编译方式安装：
$ git clone --recursive https://github.com/eosio/eosio.cdt
$ cd eosio.cdt
$ ./build.sh
$ ./install.sh
./install.sh 时报错：
-- Install configuration: ""
CMake Error at cmake_install.cmake:44 (file):
file cannot create directory: /usr/local/eosio.cdt/lib/cmake/eosio.cdt.
Maybe need administrative privileges.
make: *** [install] Error 1
>>>>>>>>>>>>>>>>>>>> MAKE installing EOSIO has exited with the above error
解决： 手动创建 eosio.cdt 目录，重新执行即可。
