[llvm-dev] [PATCH] [CMake] Allow parent projects to use in-source builds

Chris Bieneman via llvm-dev
Mon, 09 Oct 2017 17:25:32 -0000

This patch looks reasonable to me. Thank you for submitting it.

Is it correct to assume you don't have commit access? If you don't I can
commit it for you later today.

-Chris

> On Oct 8, 2017, at 9:36 PM, Henrique Jung via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
>
> Hi
>
> Would the maintainers please consider merging the attached patch? Detailed
description of my problem is on the commit log.
>
> I tracked down this build-time check back to a commit by Oscar Fuentes in
2008
(https://github.com/llvm-mirror/llvm/commit/6326a0d5090110c334a3a554bfb10b37a6fe4709
<https://github.com/llvm-mirror/llvm/commit/6326a0d5090110c334a3a554bfb10b37a6fe4709>)
and hasn't been changed since. It seems to be unnecessary to prevent a
parent project from doing in-source builds.
>
> I ran my project with `make` and it seems to have solved my problem. LLVM
now builds out-of-tree while my project can be built in-tree.
>
> I ran 'make check-llvm' to test it, which gave me this result.
>
> Testing Time: 121.05s
>   Expected Passes    : 21278
>   Expected Failures  : 220
>   Unsupported Tests  : 788
> [100%] Built target check-llvm
>
> However I couldn't build `make check-llvm` using in-tree builds, I had
to fall back to out-of-tree builds. So to summarize: now LLVM can be part of a
parent project that uses in-source builds, but the tests must still be built
out-of-tree. If the maintainers are OK with this limitation, the patch is ready.
Otherwise I'd have to track down what changes are necessary on the test
targets.
>
> Best regards
> Henrique Jung
>
>
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