I am trying to obey modern CMake target-based practices, with a twist that
everything is available as an OBJECT library if desired. I have this working
and can explain why if desired, but I feel it is extraneous for this question.
What I create:
- mylib <- the main library
- mylib_obj <- contains all of the actual objects for the library (OBJECT
library)
- mylib_interface <- linked with mylib
So it looks like this:
add_library(mylib_obj OBJECT "")
add_library(mylib_interface INTERFACE)
Based on various options / settings, target_sources(mylib_obj) will be set and
all of the various compiler operations etc. At the end, I have
# MYLIB_LIBRARY_TYPE is either SHARED or STATIC
add_library(mylib ${MYLIB_LIBRARY_TYPE} $<TARGET_OBJECTS:mylib_obj>)
target_link_libraries(mylib mylib_interface)
This works nicely, but internally I have to do the same operations for both
mylib_obj and mylib_interface.
target_include_directories(mylib_obj PUBLIC ${SomeLib_INCLUDE_DIRS})
target_include_directories(mylib_interface INTERFACE
${SomeLib_INCLUDE_DIRS})
target_link_libraries(mylib_interface INTERFACE ${SomeLib_LIBRARIES})
Without mylib_interface, I cannot include the future linking information as
well as include / compiler directive information will not be propagated with
target_link_libraries(something mylib). But mylib_obj also needs include
information, etc. But I can’t do
target_link_libraries(mylib_obj mylib_interface)
because mylib_obj is an object library.
Is there a way to avoid having to set the same thing for both mylib_obj and
mylib_interface given the requirement that mylib_obj is intended to house all
of the actual objects?
Thank you for any guidance, I’m sorry if this question doesn’t make much sense.
I’m trying to unlearn all of my outdated self-taught CMake!
-Stephen
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