Vcpkg: How do I apply 'vcpkg integrate' to e.g. v140 toolchain with v142 installed?

[ocornut]

Hello,

I have installed VS 2019 (v142) along with the 2015 and 2017 toolchains (v140 and v141) which are available in the VS 2019 installer.
(The reason is I am developing a free software which aims for high compatibility with many toolchains, I am testing dozen of compilers down to VS 2010 etc., so even though I am using the VS 2019 IDE I need to use older compilers on an daily basis.)

When I use vcpkg integrate install the include/lib integrate works if my project toolchain is set to v142 but not when set to v140, although supposedly vcpkg supports VS 2015 v140 toolchain.
How I can setup VS integration to work with the v140 toolchain? All the FAQ/documents I've checked were surprisingly evasive on how vcpkg support multiple toolchains installed on the computer.

Without support for v140 I need to always retarget my projects to v142. Dealing with many repo and many branches this is becoming very inconvenient.
Note: I do NOT have the full VS 2015 installed, only the VS 2015 toolchain available as part of VS 2019. Perhaps installing the full VS 2015 would work better?

Thank you!

EDIT may be similar to #707

[ghost]

@ocornut

• ".\vcpkg.exe integrate install" is system wide and user wide for the PC/Laptop
• ".\vcpkg.exe integrate project" is the route I took, having a vcpkg instance setup for each version of visual studio and forcing each version to use the native toolset, compiler, link, etc for that version.
• The initial setup required much thought, attention to detail, to make it versatile yet easy to work with.
• The end result has a series of scripts with shortcut setting various environment variables for both Visual Studio and vcpkg in each instance.

It would be a nice enhancement if there was a way to integrate vcpkg into each version of VS separately targeting the toolset of your choice.

[LilyWangL]

Thanks for posting this issue. Please open a new issue if this is still a problem for you.

[ocornut]

Hello @LilyWangL,

I don't understand why the issue was closed. @timautry answer is pretty much not answering the issue, albeit ignoring it. integrate install is NOT system wide as it does NOT work with alternate toolsets made available by the installer, unless the toolset gets the IDE installed., I don't understand why it couldn't be fixed at it is clearly an assymetry and limitation of vcpkg which has an obvious possible improvement:

e.g. Scenario 1
VS 2019 IDE w/ Toolchain 2019 installed
VS 2017 IDE w/ Toolchain 2017 installed

integrate install works for both toolchains.

e.g. Scenario 2
VS 2019 IDE w/ Toolchain 2019 + Toolchain 2017 installed

integrate install only works for toolchain 2019.

[ghost]

See this documentation - it may help to create an overlay custom triplet file to do what is needed:
https://github.com/microsoft/vcpkg/blob/master/docs/users/triplets.md

In depth details:
https://vcpkg.readthedocs.io/en/latest/