Paul Smith 8791d2b38e [SV 61463] Don't export inherited private variables ...

If a parent target has an exported variable that is private, don't
export it in child targets.

* NEWS: Mention this change.
* src/variable.c (target_environment): Ignore private inherited
variables.
* tests/thelp.pl: Add a new "env" operation to show env.var. values.
* tests/scripts/variables/private: Verify this new behavior.

2023-01-02 23:02:33 -05:00

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