Support for the Ninja Multi-Config generator

[MathiasMagnus]

Brief Issue Summary

CMake Tools bails out when trying to use the Ninja Multi-Config generator.

Expected:

1. Set "preferredGenerator": { "name": "Ninja Multi-Config" } for a Kit
2. Develop much like on would with a multi-configuration generator, such as MSBuild

Apparent Behavior:

Receive an error when setting the kit: Unable to set kit "{0}".

CMake Tools Log

[main] Configuring folder: Test-Boost.UT 
[main] Unable to determine what CMake generator to use. Please install or configure a preferred generator, or update settings.json, your Kit configuration or PATH variable. Error: No usable generator found.
[main] Unable to determine what CMake generator to use. Please install or configure a preferred generator, or update settings.json, your Kit configuration or PATH variable. Error: No usable generator found.

Platform and Versions

• Operating System: Windows
• CMake Version: 3.18.1
• VSCode Version: 1.48.2
• CMake Tools Extension Version: 1.4.1
• Compiler/Toolchain: Visual C++ 2019

[Wastus]

Ran into this issue as well, you can workaround this by setting: "cmake.generator": "Ninja Multi-Config", in the settings.json. Though this will not help if you want to switch between kits with different generators.
It's a bit strange that this works without complaints, but setting it in preferredGenerator does not.

As the cmake.generator settings overrides the preferredGenerator setting, you do not have to remove the content from the kit definition until the issue is resolved.

Platform and Versions

• Operating System: WIndows
• CMake Version: 3.19.4
• VSCode Version: 1.53.0
• CMake Tools Extension Version: 1.5.3
• Compiler/Toolchain: ARM GCC 10.2.1

[lygstate]

Any plan on this?

[bobbrow]

We are considering it for 1.10.0

[bobbrow]

The fix for this issue is available in 1.10 "pre-release". You can help us validate it by:

1. Opening the extensions panel in VS Code
2. Selecting the CMake Tools extension
3. Clicking the "Switch to Pre-release Version" button

[bobbrow]

This was included in 1.10 which is now generally available.