You are correct that the SDK3.0.2 has to be used with Creator 3.3 DP1. There will not compiling error will be pop-up. This error show up for Build error: error: lto-wrapper failed is because the gcc compiler is changed from 3.3 to 4.1, and CCGx 3.0.2 is released before Creator 4.1. I am checking if there is anyway to link the compiler of Creator 3.3 DP1 to Creator 4.1 to help out this issue.
For other errors, you could update all of components to latest one will fix it.