[cmake-developers] Status of pre-compiled headers

[Daniel Pfeifer]

On Mon, Jun 27, 2016 at 5:09 PM, Brad King <brad.king at kitware.com> wrote:
> On 06/24/2016 12:19 PM, Oleh Kravchenko wrote:
>> As far as I can see from issue tracker and the mail list archives of
>> "precompiled headers" feature we are still struggling for solution.
>> https://cmake.org/Bug/view.php?id=1260
>> https://gitlab.kitware.com/cmake/cmake/issues/1260
>
> Yes.  Currently we support some primitives that make it possible to use
> PCH in some circumstances but it is not a first-class feature.  One
> reason is that we (upstream) have never needed it for our own projects.
>
>> I'm ready to contribute to development, but have not idea where shall I start :)
>> I have in-depth knowledge of C/C++ development for different platforms
>> (Windows, Linux), (arm, x86, amd64) and GCC/MSVC compilers.
>
> Great, thanks for stepping forward.
>
> The first step is to propose porcelain (e.g. a target property) to
> enable and configure PCH settings, along with examples of how that
> would map to the underlying generator behavior.  We need to find an
> abstraction that works well for the way each native toolchain does
> PCH.

You may find this branch useful as a staring point:
https://github.com/purpleKarrot/CMake/commits/pch

The reason I never finished that is the same as Brad mentioned above:
I currently don't need this feature for any project.

cheers, Daniel