work around ld64 issue

[matthiasdiener]

See also conda-forge/cctools-and-ld64-feedstock#66

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-webservices]

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) and found it was in an excellent condition.

[matthiasdiener]

https://dev.azure.com/conda-forge/feedstock-builds/_build/results?buildId=898533&view=logs&jobId=ced5d8de-8227-5f3f-33a1-45cf1592c45a&j=4b3757f9-99c5-5891-6c0c-93d7030cdf7d&t=2ff5d027-ebfd-5364-5607-51694385a7af
(with the workaround reverted) illustrates the issue:

+ python demo.py
ld: dynamic main executables must link with libSystem.dylib for architecture x86_64
error: linker command failed with exit code 1 (use -v to see invocation)
Final linking of kernel sum failed.
/Users/runner/miniforge3/conda-bld/pocl-core_1710796486497/test_tmp/run_test.sh: line 11: 57149 Abort trap: 6           python demo.py

[matthiasdiener]

What do you think of 83ed9a4 ?

[inducer]

In this comment, @isuruf specifically requested to not introduce dependency cycles.

[matthiasdiener]

Should be fixed in aba69ca

[conda-forge-webservices]

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) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe:

• You're setting a constraint on the __osx virtual package directly; this should now be done by adding a build dependence on {{ stdlib("c") }}, and overriding c_stdlib_version in recipe/conda_build_config.yaml for the respective platform as necessary. For further details, please see META: {{ stdlib("c") }} migration conda-forge.github.io#2102.

[conda-forge-webservices]

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) and found it was in an excellent condition.

[matthiasdiener]

side note: this package does not seem to be built at all anymore for hwloc v1, despite the entry in conda_build_config.yaml

[matthiasdiener]

For aarch64, it seems both the Travis native and Azure emulation builds are broken at the moment. I have tested the build locally though and it seems to work fine, so we could go ahead with merging if the rest of the CI passes. This PR shouldn't affect anything related to aarch64.