find used variables doesn't consider short-circuiting

[isuruf]

Actual Behavior

If I have # [osx and c_compiler == 'toolchain_c'], then conda-build thinks c_compiler is used in windows as well.

Expected Behavior

c_compiler not in used variables in windows.

Steps to Reproduce

example recipe: conda-forge/r-base-feedstock#61

Using conda-build 3.16.2

[msarahan]

Known issue. Conda build would have to parse, not just pattern match. It would be a large increase in complexity. PRs definitely welcome here if you have good ideas on how to do this without too much work. It would be a big improvement, but it's not one that we have time to do ourselves right now.

[github-actions]

Hi there, thank you for your contribution!

This issue has been automatically marked as stale because it has not had recent activity. It will be closed automatically if no further activity occurs.

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Thanks!

[jakirkham]

Let's keep this open