Github user apiri commented on the issue:
https://github.com/apache/nifi-minifi-cpp/pull/103
After performing cmake configuration, the RAT check can be performed via
```
make apache-rat
<lots of output>
*****************************************************
Summary
-------
Generated at: 2017-05-23T13:21:38-04:00
Notes: 2
Binaries: 9
Archives: 0
Standards: 194
Apache Licensed: 194
Generated Documents: 0
JavaDocs are generated, thus a license header is optional.
Generated files do not require license headers.
0 Unknown Licenses
```
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