Github user chetmurthy commented on the issue:
https://github.com/apache/thrift/pull/1433
If nobody uses the compiler plug-in API, then it's not a breaking change
*grin*. But I think it's a great API to have -- it allows people to develop
new Thrifcompiler backends without having to understand all of the current
compiler.
And of course, to write those compiler backends in other languages. I'm in
the process of writing a new backend in Ocaml.---
