[CMake] Unknown generator output with CMake

[Craig Scott]

I have a very similar situation at work to yours. We build a generator
which produces source files, but we don't know the set of source files that
will be produced until after the generator has been run. The solution that
is working for us is documented here:

http://stackoverflow.com/a/36084786/1938798

It's a little more involved than you probably want, but we've been using it
for close to a year now and it is serving us well.


On Wed, Mar 29, 2017 at 6:57 AM, Jeandet Alexis <
alexis.jeandet at member.fsf.org> wrote:

> Hi,
>
> I play with CMake on PythonQt build. I faced a chalenge:
>
> PythonQt is composed of:
> 1)The generator which wrap Qt api(parses Qt sources to produce cpp/python
> wrappers)
> 2)The Lib (main engine)
> 3)The wrappers generated by 1)
>
> The chalenge was to build in this order:
> 1) build generator
> 2) generate from generator wrappers
> 3) build Lib
> 4) build wrappers
>
> My issue was to build wrappers from generator output since I can't predict
> how many files it will produce. And what I understood is that Glob can only
> be used at config time and I cant use *.cpp as sources.
>
> So my basic solution was to build generator and call it at config time
> using ExternalProject and execute_process:
> https://github.com/jeandet/PythonQt/blob/cmake-clean/
> cmake/generated_cpp.cmake
> Then build src and wrapper normally.
> I'm a CMake beginner but I feel that this solution is ugly and it slows
> down config time.
>
> Did I miss something?
>
> Best regards,
> Alexis.
>
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-- 
Craig Scott
Melbourne, Australia
https://crascit.com
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