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Help: Clarify wording of CMP0124

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Craig Scott
2021-07-17 16:43:12 +10:00
parent 7c6234dd21
commit 6d5f74fcd7
1 changed files with 5 additions and 7 deletions
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Help/policy/CMP0124.rst
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@@ -3,14 +3,12 @@ CMP0124
.. versionadded:: 3.21
The loop variables created by :command:`foreach` command have now their scope
restricted to the loop scope.
When this policy is set to ``NEW``, the scope of loop variables defined by the
:command:`foreach` command is restricted to the loop only. They will be unset
at the end of the loop.
Starting with CMake 3.21, the :command:`foreach` command ensures that the loop
variables have their scope restricted to the loop scope.
The ``OLD`` behavior for this policy let the loop variables to exist, with an
empty value, in the outer scope of loop scope.
The ``OLD`` behavior for this policy still clears the loop variables at the end
of the loop, but does not unset them. This leaves them as defined, but empty.
This policy was introduced in CMake version 3.21. Use the
:command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly.