let FindLPSolve also specify library dir

finders/FindLPSolve.cmake

@@ -22,13 +22,15 @@ find_library(LPSOLVE_LIBRARY
                    /usr/lib
             )
 
+get_filename_component(LPSOLVE_LIBRARY_DIR ${LPSOLVE_LIBRARY} DIRECTORY CACHE)
 
 include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(LPSOLVE DEFAULT_MSG LPSOLVE_INCLUDE_DIR LPSOLVE_LIBRARY)
+find_package_handle_standard_args(LPSOLVE DEFAULT_MSG LPSOLVE_INCLUDE_DIR LPSOLVE_LIBRARY LPSOLVE_LIBRARY_DIR)
 
 if(LPSOLVE_FOUND AND NOT TARGET lpsolve::lpsolve)
     add_library(lpsolve::lpsolve INTERFACE IMPORTED)
     target_include_directories(lpsolve::lpsolve INTERFACE ${LPSOLVE_INCLUDE_DIR})
+    target_link_directories(lpsolve::lpsolve INTERFACE ${LPSOLVE_LIBRARY_DIR})
     target_link_libraries(lpsolve::lpsolve INTERFACE ${LPSOLVE_LIBRARY})
 endif()