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34 lines
1.6 KiB
ReStructuredText
34 lines
1.6 KiB
ReStructuredText
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CMP0137
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-------
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.. versionadded:: 3.24
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:command:`try_compile` passes platform variables in project mode.
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The :command:`try_compile` command :ref:`source file <Try Compiling Source
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Files>` signature propagates CMake variables containing platform settings,
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and those specified by the :variable:`CMAKE_TRY_COMPILE_PLATFORM_VARIABLES`
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variable, into the generated test project. This helps the test project drive
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the toolchain the same way the calling project will. In CMake 3.23 and below,
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the :ref:`whole-project <Try Compiling Whole Projects>` signature does not
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propagate platform variables automatically. CMake 3.24 and above prefer to
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propagate platform variables in the :ref:`whole-project <Try Compiling Whole
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Projects>` signature. This policy provides compatibility with projects that
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have not been updated to expect the behavior.
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The ``OLD`` behavior for this policy is to not pass any additional variables to
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the :ref:`whole-project <Try Compiling Whole Projects>` signature.
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The ``NEW`` behavior for this policy is to pass the same variables that the
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:ref:`source file <Try Compiling Source Files>` signature does.
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Regardless of the policy setting, the
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:variable:`CMAKE_TRY_COMPILE_NO_PLATFORM_VARIABLES` variable may be set
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to suppress passing the platform variables through either signature.
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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 this policy to ``OLD`` or ``NEW``
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explicitly. Unlike many policies, CMake version |release| does *not* warn
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by default when this policy is not set and simply uses ``OLD`` behavior.
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.. include:: DEPRECATED.txt
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