0d6a2381b2
When using modules for compiler (and/or external package), if a package's `setup_[dependent_]build_environment` sets `PYTHONHOME`, it can influence the python subprocess executed to gather module information. The error seen was: ``` json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0) ``` But the actual hidden error happened in the `python -c 'import json...'` subprocess, which made it return an empty string as json: ``` ModuleNotFoundError: No module named 'encodings' ``` This fix uses `python -E` to ignore `PYTHONHOME` and `PYTHONPATH`. Should be safe here because the python subprocess code only use packages built-in python. The python subprocess in `environment.py` was also patched to be safe and consistent. |
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