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IMPORTED_OBJECTS_<CONFIG>
New in version 3.9.
<CONFIG>-specific version of IMPORTED_OBJECTS property.
Configuration names correspond to those provided by the project from which the target is imported.
Xcode Generator Considerations
Do not use this <CONFIG>-specific property if you need to use Xcode variables like $(CURRENT_ARCH) or $(EFFECTIVE_PLATFORM_NAME) in the value. The <CONFIG>-specific properties will be ignored in such cases because CMake cannot determine whether a file exists at the configuration-specific path at configuration time. For such cases, use IMPORTED_OBJECTS instead.
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https://cmake.org/cmake/help/v3.21/prop_tgt/IMPORTED_OBJECTS_CONFIG.html