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33 lines
1.5 KiB
33 lines
1.5 KiB
11 years ago
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CMP0018
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-------
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Ignore CMAKE_SHARED_LIBRARY_<Lang>_FLAGS variable.
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CMake 2.8.8 and lower compiled sources in SHARED and MODULE libraries
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using the value of the undocumented CMAKE_SHARED_LIBRARY_<Lang>_FLAGS
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platform variable. The variable contained platform-specific flags
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needed to compile objects for shared libraries. Typically it included
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a flag such as -fPIC for position independent code but also included
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other flags needed on certain platforms. CMake 2.8.9 and higher
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prefer instead to use the POSITION_INDEPENDENT_CODE target property to
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determine what targets should be position independent, and new
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undocumented platform variables to select flags while ignoring
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CMAKE_SHARED_LIBRARY_<Lang>_FLAGS completely.
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The default for either approach produces identical compilation flags,
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but if a project modifies CMAKE_SHARED_LIBRARY_<Lang>_FLAGS from its
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original value this policy determines which approach to use.
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The OLD behavior for this policy is to ignore the
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POSITION_INDEPENDENT_CODE property for all targets and use the
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modified value of CMAKE_SHARED_LIBRARY_<Lang>_FLAGS for SHARED and
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MODULE libraries.
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The NEW behavior for this policy is to ignore
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CMAKE_SHARED_LIBRARY_<Lang>_FLAGS whether it is modified or not and
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honor the POSITION_INDEPENDENT_CODE target property.
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This policy was introduced in CMake version 2.8.9. CMake version
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|release| warns when the policy is not set and uses OLD behavior. Use
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the cmake_policy command to set it to OLD or NEW explicitly.
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