[question] toolset v143 in CMakePresets.json while the libraries are built with vcvars_ver=14.4, why?

[artem-kamyshev]

What is your question?

Hello,
I want to build my project with newest MS VS 2022.
I use Ninja to build it.

I use myown CMakePreset.json but it lacks PATH env setup which is done for conan-debug preset. While thinking on switching to the one generated by conan I see

            "toolset": {
                "value": "v143",
                "strategy": "external"
            },

This does not seem right, as my MS VS 2022 is of Version 17.13.6. Looking at https://learn.microsoft.com/en-us/cpp/overview/compiler-versions?view=msvc-170 we see that compiler version is 1944. And as written in https://devblogs.microsoft.com/cppblog/msvc-toolset-minor-version-number-14-40-in-vs-2022-v17-10/ I assume the right and latest toolset should be v144:

Custom build systems, projects, libraries, and VS Extensions checking for valid MSVC build version will need to be adjusted to allow for ‘14.4x’.

I have both v143 and 14.42.34433 in c:\Program Files\Microsoft Visual Studio\2022\Community\VC\Redist\MSVC.
c:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\Microsoft.VCToolsVersion.default.txt contains 14.43.34808.

My conan profile for building the depedencies is the following:

[settings]
arch=x86_64
build_type=Debug
compiler=msvc
compiler.cppstd=17
compiler.runtime=dynamic
compiler.version=194
os=Windows

[conf]
tools.cmake.cmaketoolchain:generator=Ninja
tools.env.virtualenv:powershell=powershell.exe
tools.microsoft.msbuild:installation_path=C:\Program Files\Microsoft Visual Studio\2022\Community\
tools.microsoft.msbuild:vs_version=17
tools.microsoft:winsdk_version=10.0.22621.0

As I see the following line during the build of the conan packages

conanvcvars.bat: Activating environment Visual Studio 17 - amd64 - winsdk_version=10.0.22621.0 - vcvars_ver=14.4

I assume it should use v144, but when I look at the generated CMakePresets.json I see 144 in it.

I've read something like them being compatible but what bothers me is that if I use this preset, will it make myown code build with v144 as well? This wouldn't be the result I want to get.

Have you read the CONTRIBUTING guide?

• I've read the CONTRIBUTING guide

[memsharded]

Hi @artem-kamyshev

Thanks for your question.

That is a thing from Microsoft versioning. They overflow the compiler version, but they kept the toolset numbering:

So the compiler can be 1944 or 19.44 from the VS 17.14 update (see https://learn.microsoft.com/en-us/cpp/overview/compiler-versions?view=msvc-170).
Then, the toolset version can also be 14.4 (14.40, 14.41, etc), see https://devblogs.microsoft.com/cppblog/msvc-toolset-minor-version-number-14-40-in-vs-2022-v17-10/

But see in that that link that the platform toolset, is still v143 (starting with the v):

The C++ Project System (MS Build) is being updated to support ‘14.4x’ MSVC toolsets under the v143 Platform Toolset.

So the "toolset version" and the "platform toolset" are different things.