Migrate Conda recipes to {{ stdlib('c') }}

[jakirkham]

The sysroot* syntax used currently by RAPIDS recipes is getting phased out

Sample syntax as seen currently in librmm:

recipe/meta.yaml:

    - sysroot_{{ target_platform }} {{ sysroot_version }}

recipe/conda_build_config.yaml:

sysroot_version:
  - "2.17"

---

The recommendation is to move to {{ stdlib('c') }} ( conda-forge/conda-forge.github.io#2102 )

Changes would look something like this

recipe/meta.yaml:

-    - sysroot_{{ target_platform }} {{ sysroot_version }}
+    - {{ stdlib('c') }}

recipe/conda_build_config.yaml:

-sysroot_version:
+c_stdlib_version:
  - "2.17"

---

Raising this issue to track making these changes in RAPIDS

[bdice]

@jakirkham This seems like an easy change to automate for conda recipes. Let me know if I should work on that.

What should be done about sysroot packages in dependencies.yaml?

https://github.com/rapidsai/rmm/blob/9e6db746f1a4a6361fb9fadf381f749dc52faaea/dependencies.yaml#L91

[jakirkham]

Yep seems like a good rapids-reviser task. Could also be a good learning opportunity potentially

Are those just being used in environment files? If so, that seems ok to keep. The sysroot package still exists. It is just we are changing the recipe specification

Also spelled out the changes a bit more above

[jameslamb]

@hcho3 I've assigned this to you here since you've been working on it.

[jakirkham]

Bradley and I reviewed. We think they look good

Asking OPS for a review. That will likely happen early next week

If OPS approves, we can merge

[jakirkham]

These are all now merged. Closing as complete

Thanks Hyunsu for the PRs and everyone for the reviews! 🙏