CRT linking option of Triplet not considered by CMake Toolchain

[Squareys]

Hi everybody, Hi @ras0219-msft !

When installing packages with the x64-windows-static triplet, the CRT ist linked statically. When compiling with the CMake toolchain (scripts/buildsystems/vcpkg.cmake), and VCPKG_TARGET_TRIPLET=x64-windows-static, the CRT is dynamically linked.

Effectively this makes compilation a little difficult, as then a mismatch of runtimes is detected and compilation fails.

While some libraries (like sdl2) provide an configuration option to force runtime linkage to static or dynamic, I believe for libraries should generally not require notion of CRT linking types in such a way. The toolchain should instead correctly set CMAKE_C(XX)_FLAGS as with installation.

Please let me know what you think. I would be great if someone could handle this (as I won't be able to get around to doing so myself in the near future.)

Cheers, Jonathan

[Squareys]

@ras0219-msft Any comments? :)

[Squareys]

@ras0219-msft I may have a bit of time to look at this (it doesn't look like a complex task to me). In case you agree that it should behave as described.

[Squareys]

I just noticed that alot of the toolchain handling etc has changed in the past couple of days. As far as I understand, with the new scripts/toolchains/windows.cmake, this should all work fine! 🎉 it would be fine, if scripts/buildsystems/vcpkg.cmake would be using it (?)

[Squareys]

@ras0219-msft Sorry for being so obtrusive, but it would be really great to know what to do about this.

As mentioned, I would even have time to do another PR, in case you see the need for something being changed.

[Squareys]

There is the VCPKG_CRT_LINKAGE environment variable, see documentation