Github user achristianson commented on the issue:
https://github.com/apache/nifi-minifi-cpp/pull/301
Going to close this PR as invalid. FlexLexer.h appears to be incompatible
between common versions. Flex/bison are build requirements when EL code is
generated. This ticket made it possible to build when system headers were not
in the include path (e.g. Android builds); this remains a requirement, but a
different solution needs to be applied.---
