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CMake/Tests/RunCMake/CMP0022/CMP0022-WARN.cmake

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Introduce the INTERFACE_LINK_LIBRARIES property. This property replaces the properties which match (IMPORTED_)?LINK_INTERFACE_LIBRARIES(_<CONFIG>)?, and is enabled for IMPORTED targets, and for non-IMPORTED targets only with a policy. For static libraries, the INTERFACE_LINK_LIBRARIES property is also used as the source of transitive usage requirements content. Static libraries still require users to link to all entries in their LINK_LIBRARIES, but usage requirements such as INCLUDE_DIRECTORIES COMPILE_DEFINITIONS and COMPILE_OPTIONS can be restricted to only certain interface libraries. Because the INTERFACE_LINK_LIBRARIES property is populated unconditionally, we need to compare the evaluated result of it with the link implementation to determine whether to issue the policy warning for static libraries. For shared libraries, the policy warning is issued if the contents of the INTERFACE_LINK_LIBRARIES property differs from the contents of the relevant config-specific old LINK_INTERFACE_LIBRARIES property.
2013-06-04 18:25:47 +04:00
project(CMP0022-WARN)
add_library(foo SHARED empty_vs6_1.cpp)
add_library(bar SHARED empty_vs6_2.cpp)
add_library(bat SHARED empty_vs6_3.cpp)
set_property(TARGET bar PROPERTY INTERFACE_LINK_LIBRARIES foo)
set_property(TARGET bar PROPERTY LINK_INTERFACE_LIBRARIES bat)
add_library(user empty.cpp)
target_link_libraries(user bar)
CMP0022: Warn about a given target at most once Since cmTarget::ComputeLinkInterface is called separately for each "head" target that links a target, the warning we produce when CMP0022 is not set could be repeated. Add explicit logic to allow the warning to appear at most once. Multiple copies of the warning for the same target are almost always identical and therefore redundant. In the rare case that two copies of the warning are different, the second can appear in a future run after the first is fixed.
2013-11-03 15:45:21 +04:00
# Use "bar" again with a different "head" target to check
# that the warning does not appear again.
add_library(user2 empty_vs6_3.cpp)
target_link_libraries(user2 bar)