How can I check in a generator expression if a target has a given property?
I am looking for somethig like
$<TARGET_HAS_PROPERTY:tgt,property>
CMake: generator expression to check if target has a property
Viewed 140
1 Answers
Since a non-existing property yields the empty string, you could always do a string comparison to the empty string. This requires the property to be set to a value other than the empty string, if it's set of course so specific cases this approach may not work:
$<STREQUAL:$<TARGET_PROPERTY:tgt,property>,>
yields the negation, so
$<NOT:$<STREQUAL:$<TARGET_PROPERTY:tgt,property>,>>
yields the bool value you're looking for.
Example
add_custom_target(test_print COMMAND ${CMAKE_COMMAND} -E echo $<IF:$<STREQUAL:$<TARGET_PROPERTY:MyTarget,CXX_STANDARD>,>,"CXX_STANDARD not set for target MyTarget","CXX_STANDARD set for target MyTarget">)
Related