Allow projects using the CMake integration to automatically select an appropriate 'static' triplet

[fredemmott]

With MSBuild I can do something like this:

 <PropertyGroup Label="Globals">
 <!-- .... -->
 <VcpkgTriplet Condition="'$(Platform)'=='Win32'">x86-windows-static</VcpkgTriplet>
 <VcpkgTriplet Condition="'$(Platform)'=='x64'">x64-windows-static</VcpkgTriplet>
</PropertyGroup>

it would be nice if I could do something similar when using the CMake project, instead of requiring the user to specify -DVCPKG_TARGET_TRIPLET

This isn't current possible as:

• CMake doesn't make the architecture available until after project()
• When using the vcpkg toolchain file, the triplet must be set before project()

[fredemmott]

@FrankXie05 this post is about cmake, not msbuild, and it is a vcpkg feature request, not a general usage question - i used vcpkg’s msbuild support as an example. your response is answering a different question to what I asked.

[FrankXie05]

If you choose the vcpkg build triplet based on the project, it is indeed more convenient.

However, I think this is almost impossible to achieve. Without calling vcpkg in the cmake project, toolchain is the best integration method.
If you want to adapt, you must call vcpkg in the cmake project.

Just like the project() mechanism you mentioned, we can't bypass it.

[FrankXie05]

I wish I could find a way to do this. But it seems to me that this is not possible, so I'm turning this into a discussion.