[llvm-branch-commits] [mlir] [MLIR][Standalone] test Standalone against install distributions (PR #157944)

[Christopher Bate via llvm-branch-commits]

christopherbate wrote:

I don't fully understand the rationale for adding this test. I followed the links, and it seems to stem from [this comment](https://github.com/llvm/llvm-project/pull/157583#issuecomment-3274164357). But the relationship between that failure and this test is not clear to me. What does Standalone project have to do with testing `install-distributions`?

Wouldn't the failure mentioend by @ftynse be caught by exercising `install-distributions` in any normal CI test? 

The test appears to be launching a CMake configuration process operating on the same build/source directory, and then also a nested build command...but the parent process is itself a cmake build command in the same build directory. Is such a thing even supported by CMake? Seems like the result of doing that would be undefined behavior.

https://github.com/llvm/llvm-project/pull/157944