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cmake_policy(SET CMP0004 OLD)
add_library(foo SHARED empty.cpp)
add_library(bar SHARED empty.cpp)
add_library(bing SHARED empty.cpp)
add_library(bung SHARED empty.cpp)
cmake_policy(SET CMP0004 NEW)
add_library(bat SHARED empty.cpp)
target_link_libraries(foo "$<1: bar >")
target_link_libraries(bing "$<$<NOT:$<TARGET_POLICY:CMP0004>>: bar >")
target_link_libraries(bung "$<$<TARGET_POLICY:CMP0004>: bar >")
# The line below causes the error because the policy is NEW when bat
# is created.
target_link_libraries(bat "$<1: bar >")