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LINK_LIBRARY_OVERRIDEΒΆ

New in version 3.24.

To resolve incompatible features introduced by LINK_LIBRARY generator expression, this property offers the possibility to override, per link-item (CMake target or external library) involved in the link step, any defined features with a new one.

This property takes a ;-list of override declarations which have the following format:

feature[,link-item]*

For the list of link-item (CMake target or external library) specified, the feature feature will be used in place of any declared feature. For example:

add_library(lib1 ...)
target_link_libraries(lib1 PUBLIC "$<LINK_LIBRARY:feature1,external>")

add_library(lib2 ...)
target_link_libraries(lib2 PUBLIC "$<LINK_LIBRARY:feature2,lib1>")

add_library(lib3 ...)
target_link_libraries(lib3 PRIVATE lib1 lib2)
# Here, lib1 has two different features which prevents to link lib3
# So, define LINK_LIBRARY_OVERRIDE property to ensure correct link
set_property(TARGET lib3 PROPERTY LINK_LIBRARY_OVERRIDE "feature2,lib1,external")
# The lib1 and external will be used with FEATURE2 to link lib3

It is also possible to override any feature with the pre-defined feature DEFAULT to get the standard behavior (i.e. no feature):

set_property(TARGET lib3 PROPERTY LINK_LIBRARY_OVERRIDE "DEFAULT,lib1"
                                                        "feature2,external")
# The lib1 will be used without any feature and external will use feature2 to link lib3

Contents of LINK_LIBRARY_OVERRIDE may use generator expressions.

See also LINK_LIBRARY_OVERRIDE_<LIBRARY> target property for a per linked target oriented approach to override features.

For more information about features, see CMAKE_<LANG>_LINK_LIBRARY_USING_<FEATURE> and CMAKE_LINK_LIBRARY_USING_<FEATURE> variables.

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