When building from source, meshlab and meshlabserver are dynamically linked to libcommon.so. Unfortunately the binaries search for this library in the directory structure where meshlab was built. Usually the source tree structure is removed after the binaries has been installed to some place like /usr/local/meshlab.
The included patch sets '$ORIGIN' in rpath so the binaries searches for libraries in the same directory as where the binaries resides. Many thanks to the page http://codea-dev.blogspot.com/2010/12/qmake-rpath-and-evil-origin.html which explains the mess with qmake and rpath.
Anonymous
Sets '$ORIGIN' in rpath