helloworld example build mode problem,default is debug,how to change it to release?

[唐雷]

I have build grpc in Ubuntu 16.04.When I build the hellowold example,I find that gdb can run it,I  realise it run debug mode now,how can i to use release mode, I use Cmake release it not work。

[Richard Belleville]

This is really more of a cmake question, but a release build can be created with cmake -DCMAKE_BUILD_TYPE=Release