That is missing a space and also some other information.
There are two different options.
The -l (lower-case L) option needs to be followed by the name of a library to link into the object. An example of that is -llibMatlabDataArray which is saying that the libMatlabDataArray library needs to be located and linked into the object.
The -L (upper-case L) option needs to be followed by a directory name. The option indicates that the linker should add the given directory to the list of directories to search for libraries whose name have been given by -l (lower-case L) options.
Note that it is recommended that directory names with spaces in them be enclosed in double-quotes,