[CMake] Custom transitive list-valued properties

[Mark Stijnman]

Hi,



Is there a way to declare a target property to be transitive and accumulate
into a list? Similar to how COMPILE_DEFINITIONS works, but for custom
properties? I know about COMPATIBLE_INTERFACE_STRING etc, which create a
transitive property, but the values don't accumulate into a list.


As a minimal example, I would like the below code to generate
properties.txt with contents like “C;B;A” (I don’t really care about the
order), instead of just "C", which it currently generates. Can I do this
somehow? Thanks,


regards Mark


cmake_minimum_required(VERSION 3.7)

project(proptest)



# insert something like “add_transitive_property(MYPROP)” here?



add_library(lib1 INTERFACE)

set_property(TARGET lib1 PROPERTY INTERFACE_MYPROP "A")



add_library(lib2 STATIC lib2.cpp)

set_property(TARGET lib2 PROPERTY INTERFACE_MYPROP "B")

target_link_libraries(lib2 lib1)



add_executable(proptest main.cpp)

target_link_libraries(proptest lib2)

set_property(TARGET proptest PROPERTY MYPROP "C")



file(GENERATE OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/properties.txt

  CONTENT "$<TARGET_PROPERTY:proptest,MYPROP>")
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