The -l
flags are also linker options.
For an IMPORTED
target, it’s something like:
add_library(custom STATIC IMPORTED)
set_target_properties(custom PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "/abs/path/to/custom/includes/dir"
IMPORTED_LOCATION "/opt/custom/lib/libcustom.a"
INTERFACE_LINK_LIBRARIES "gfortran;m"
)
You then use it by target_link_libraries(main PRIVATE custom)
.