[CMake] Dependencies on imported libraries

[Dennis Schridde]

Hello!

The binary I am building has a dependency on an external
library.
This library may be present system-wide, otherwise I am building it
in a subdirectory.
Therefore I am calling these
commands:

add_custom_target(BuildMyLib ...)
add_library(MyLib SHARED
IMPORTED)
add_dependencies(MyLib BuildMyLib)
set_property(TARGET MyLib
PROPERTY IMPORTED_LOCATION "${MYLIB_DIR}/build")
target_link_libraries(MyBin
MyLib)

This however does not work:
Apparently imported libraries cannot
have dependencies:
"""add_dependencies Adding dependency to non-existent
target"""

Is there a way to make the imported library a real target, which
can have dependencies? Or, if not, can such a feature be added to
CMake?

Kind regards,
Dennis
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