use m2w64-sysroot as m2w64_c_stdlib; set version

[h-vetinari]

This is I think a leftover TODO from the work that @isuruf did on the m2w64-stack. I notice that other places (e.g. r-base or our linux compilers) set

c_stdlib:                  # [win]
  - m2w64-sysroot          # [win]
c_stdlib_version:          # [win]
  - 12                     # [win]

AFAICT this would be the correct behaviour to aim for for recipes that use {{ stdlib("m2w64_c") }} # [win]. I noticed this in libhwloc, where the default rerender still pulls in an old toolchain.

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

[isuruf]

There's a migrator on the way, so let's not do this until we are ready to merge in the migrator

[h-vetinari]

There's a migrator on the way, so let's not do this until we are ready to merge in the migrator

Is there any issue or PR for this? If not, could you please open one? It's hard to keep track of things if it's all just in our heads.

[isuruf]

No there's no issue. We usually don't make issue for migrators to be closed. Please open an issue if you prefer.

[h-vetinari]

Ah I misunderstood. When you said "on the way" I thought you meant a new one, but presumably you mean the R migration?