Shared Precompiled Headers

Question

How do I share a precompiled header across multiple projects in the same solution in Visual Studio 2019?

As a requirement, I do not want to create a project just to compile the precompiled header, which then is included and referenced by other projects.

I know the feature simply didn't exist in the past and you'd have to use a pre-build event to copy the actual output file for it to each other project. Since VS has changed a lot over the years, I figure it's time to reask this question because there's no information immediately available on google.

I was looking at this question but it seems that it isn't viable in a production environment.

Or is there something better using C++20 modules?

Would https://stackoverflow.com/a/42760563/2707864 not work? — sancho.s ReinstateMonicaCellio, Apr 21 '20 at 08:49
@sancho.sReinstateMonicaCellio In my specific case, it would unfortunately not. That is why I specified it in the question. — nowi, Apr 21 '20 at 08:58
If you could specify why would that not work (did I miss that from your OP?), it helps. — sancho.s ReinstateMonicaCellio, Apr 21 '20 at 10:44
I do not have permission to add a whole new project, but I do have permission to modify project properties as necessary — nowi, Apr 21 '20 at 18:27
As far as I'm concerned, for more details about the support for shared PCHs, you could refer to the [devblogs](https://devblogs.microsoft.com/cppblog/shared-pch-usage-sample-in-visual-studio/).I am afraid that there is no more convenient and quick way for now. — Jeaninez - MSFT, Apr 23 '20 at 03:16
@Jeaninez-MSFT Where would I go to make a request for a feature like this? — nowi, Apr 28 '20 at 01:02
I suggest you could post the issue to the [Developer Community](https://developercommunity.visualstudio.com/spaces/8/index.html) for better help. — Jeaninez - MSFT, Apr 28 '20 at 01:28

score 0 · Answer 1 · answered Apr 07 '20 at 05:38

As far as I concerned, you should need a SharedPCH, it is building the pch and the static library. When ConsoleApplication projects reference the SharedPCH one, the build will automatically link the SharedPCH’s static lib, but several project properties need to be changed as well. As those properties need to be changed similarly for all projects, I suggest you could create the SharedPCH.props and CustomBuildStep.props files and imported them to your projects using the Property Manager tool window.For more details I suggest you could refer to the Blog

Shared Precompiled Headers

1 Answers1