[llvm-dev] Switching to Ninja

[Travis Finkenauer via llvm-dev]

On Sun, Aug 9, 2020 at 11:04 AM Paul C. Anagnostopoulos via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
>
> 2. The first build attempt failed because the existing TableGen Language Reference has multiple instances of the production 'SimpleValue', which produces warnings from Sphinx. I fixed that by adding -DSPHINX_WARNINGS_AS_ERRORS:BOOL=OFF to the cmake command. Does the official build do that, too? I searched all the CMakeLists files but didn't find any use of that option.
>

I ran into the same issue (on Ubuntu) and already filed an issue:
https://bugs.llvm.org/show_bug.cgi?id=47062