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diff --git a/Help/policy/CMP0043.rst b/Help/policy/CMP0043.rst new file mode 100644 index 0000000..89a6cde --- /dev/null +++ b/Help/policy/CMP0043.rst @@ -0,0 +1,39 @@ +CMP0043 +------- + +Ignore COMPILE_DEFINITIONS_<Config> properties + +CMake 2.8.12 and lower allowed setting the +:prop_tgt:`COMPILE_DEFINITIONS_<CONFIG>` target property and +:prop_dir:`COMPILE_DEFINITIONS_<CONFIG>` directory property to apply +configuration-specific compile definitions. + +Since CMake 2.8.10, the :prop_tgt:`COMPILE_DEFINITIONS` property has supported +:manual:`generator expressions <cmake-generator-expressions(7)>` for setting +configuration-dependent content. The continued existence of the suffixed +variables is redundant, and causes a maintenance burden. Population of the +:prop_tgt:`COMPILE_DEFINITIONS_DEBUG <COMPILE_DEFINITIONS_<CONFIG>>` property +may be replaced with a population of :prop_tgt:`COMPILE_DEFINITIONS` directly +or via :command:`target_compile_definitions`: + +.. code-block:: cmake + + # Old Interface: + set_property(TARGET tgt APPEND PROPERTY + COMPILE_DEFINITIONS_DEBUG DEBUG_MODE + ) + + # New Interfaces: + set_property(TARGET tgt APPEND PROPERTY + COMPILE_DEFINITIONS $<$<CONFIG:Debug>:DEBUG_MODE> + ) + target_compile_definitions(tgt PRIVATE $<$<CONFIG:Debug>:DEBUG_MODE>) + +The OLD behavior for this policy is to consume the content of the suffixed +:prop_tgt:`COMPILE_DEFINITIONS_<CONFIG>` target property when generating the +compilation command. The NEW behavior for this policy is to ignore the content +of the :prop_tgt:`COMPILE_DEFINITIONS_<CONFIG>` target property . + +This policy was introduced in CMake version 3.0.0. CMake version +|release| warns when the policy is not set and uses OLD behavior. Use +the cmake_policy command to set it to OLD or NEW explicitly. |