[PATCH] D23833: [Polly] Introduce unittests.

[Tobias Grosser via llvm-commits]

> Meinersbur marked 3 inline comments as done.
> Meinersbur added a comment.
> 
> Out-of-tree unit tests are not easy as it requires gtest from the LLVM
> source tree. Polly up to now only requires the LLVM_INSTALL_ROOT.
> llvm-config can be queried for the source dir, but then we need to
> compile gtest ourselves.
> 
> Clang has a different approach: It requires the source tree and broadly
> imports all cmake files such that it can use the LLVM functions to build
> the files.

We can possibly just skip them in out-of-tree builds. This is clearly
not the most common configuration.

Best,
Tobias