Initially asked on the forum, will post description here. https://discourse.cmake.org/t/is-there-a-way-to-implement-a-feature-similar-to-cmake-my-var-for-setting-properties/1196 To disable some compile flags based on a target property, consumers of my library have to do something like the following: ```cmake find_package(Mylib) add_executable(app_target) target_link_libraries(app_target INTERFACE mylib::mylib) set_target_properties(app_target PROPERTIES DISABLE_SPECIAL_FLAG 1) ``` and my library when created has something like the following ```cmake add_library(SHARED mylib) set(genex_condition "$<NOT:$<BOOL:$<TARGET_PROPERTY:DISABLE_SPECIAL_FLAG>>>") set(flags "$<${genex_condition}:-my-nice-flag>") target_compile_options("mylib" INTERFACE "${flags}") ``` The above API forces users to explicitly set the `DISABLE_SPECIAL_FLAG` property on each target that is directly linking against mylib (I’m aware that users can work around it by linking publicly against their own interface library that sets it only once). It would be nice if users could define something like `CMAKE_AUTOMOC`, where if the `CMAKE_AUTOMOC` variable is set in a scope, all targets created below that variable get their `AUTOMOC` property initialized to whatever is set in `CMAKE_AUTOMOC`. So I’d like the user to set a `GLOBAL_DISABLE_SPECIAL_FLAG` variable to 1, and then the `DISABLE_SPECIAL_FLAG` property is automatically populated with 1 for all targets created below that statement. Perhaps it could be done via a command call rather than a variable. Something like: `add_properties(PROPERTY_NAME "value")`, and all targets created within this scope and later would have that property set.