To link an executable with a library that resides in a standard location, one can do the following in a CmakeLists.txt file:
create_executable(generate_mesh generate_mesh.cpp)
target_link_libraries(generate_mesh OpenMeshCore)
This would work if the library, that is being linked against, was placed in
/usr/local/lib/libOpenMeshCore.dylib
However, in this case the library resides under
/usr/local/lib/OpenMesh/libOpenMeshCore.dylib
How can I specify that target_link_libraries should really link against a library placed in a sibdirectory? I wonder there is some useful option to target_link_libraries that would specify that the library is in a subdirectory in a standandard location, e.g.
target_link_libraries(generate_mesh OpenMesh/OpenMeshCore)
If that is not possible, is there a way to use find_library to search /usr/local/lib recursively, including its sub-directories, for the given library file?
You can add different directories to find_library. To use this library call cmake by cmake -DFOO_PREFIX=/some/path ....
find_library( CPPUNIT_LIBRARY_DEBUG NAMES cppunit cppunit_dll cppunitd cppunitd_dll
PATHS ${FOO_PREFIX}/lib
/usr/lib
/usr/lib64
/usr/local/lib
/usr/local/lib64
PATH_SUFFIXES debug )
find_library( CPPUNIT_LIBRARY_RELEASE NAMES cppunit cppunit_dll
PATHS ${FOO_PREFIX}/lib
/usr/lib
/usr/lib64
/usr/local/lib
/usr/local/lib64
PATH_SUFFIXES release )
if(CPPUNIT_LIBRARY_DEBUG AND NOT CPPUNIT_LIBRARY_RELEASE)
set(CPPUNIT_LIBRARY_RELEASE ${CPPUNIT_LIBRARY_DEBUG})
endif(CPPUNIT_LIBRARY_DEBUG AND NOT CPPUNIT_LIBRARY_RELEASE)
set( CPPUNIT_LIBRARY debug ${CPPUNIT_LIBRARY_DEBUG}
optimized ${CPPUNIT_LIBRARY_RELEASE} )
# ...
target_link_libraries(foo ${CPPUNIT_LIBRARY})
来源：https://stackoverflow.com/questions/3380888/how-to-find-a-library-with-cmake