[NOT READY FOR REVIEW] config mk to py, reduce dependency on make#4014

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oharboe wants to merge 9 commits intoThe-OpenROAD-Project:masterfrom

Pinata-Consulting:config-mk-to-py

Commits on Mar 18, 2026

flow: move PYTHON_EXE definition before platform config.mk include

oharboe
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claude
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flow: replace platform config.mk with Python config.py + shim

oharboe
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claude
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flow: add 137 unit tests for platform config.py files

oharboe
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claude
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flow: guard test files against missing pytest in CI

oharboe
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claude
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flow: keep $(PLATFORM_DIR) and $(PLATFORM) unexpanded in config.py output

oharboe
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claude
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flow: add 18 unit tests for unexpanded $(PLATFORM_DIR) and $(PLATFORM)

oharboe
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claude
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flow: document config.py variable rules in variables.md

oharboe
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claude
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flow: convert platform config tests from pytest to unittest

oharboe
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claude
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flow: run black on platform_config_utils.py

oharboe
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claude
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