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27 lines
1.2 KiB
ReStructuredText
27 lines
1.2 KiB
ReStructuredText
CMP0132
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.. versionadded:: 3.24
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Apart from when using the Xcode generator and some Visual Studio generators,
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CMake 3.23 and below will set environment variables like :envvar:`CC`,
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:envvar:`CXX`, etc. when the corresponding language is enabled.
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This only occurs on the very first time CMake is run in a build directory,
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and the environment variables are only defined at configure time, not build
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time. On subsequent CMake runs, these environment variables are not set,
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opening up the opportunity for different behavior between the first and
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subsequent CMake runs. CMake 3.24 and above prefer to not set these
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environment variables when a language is enabled, even on the first run in
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a build directory.
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The ``OLD`` behavior for this policy sets the relevant environment variable
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on the first run when a language is enabled. The ``NEW`` behavior for this
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policy does not set any such environment variables.
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This policy was introduced in CMake version 3.24. Use the
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:command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly.
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Unlike many policies, CMake version |release| does *not* warn
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when this policy is not set and simply uses ``OLD`` behavior.
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.. include:: DEPRECATED.txt
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