[CMake] What is --build-two-config good for

[Robert Maynard]

It is possible to have CMake projects where an initial configuration of the
project is insufficient for it to be in a valid state. This is generally
caused by a project which evaluates variables before they exist and saved
into the cache. By running CMake a second time for these projects the
evaluation works 'as intended' at the build is the correct state.

On Thu, Dec 6, 2018 at 1:05 AM Torsten Robitzki <Torsten at robitzki.de> wrote:

> Hello,
> can someone of you tell me, what the purpose of the CTest
> —build-two-config command line option is? The documentation says, that it
> is part of the CTest Build and Test Mode and that it will cause CTest to
> run CMake twice. I’ve checked the code and yes, it does exactly this.
>
> But why? What could be the reason to run CMake twice, when running CMake
> in a test from CTest?
>
> Best regards,
>
> Torsten
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