export PKG_CONFIG_LIBDIR=/usr/lib ; cmake -DCMAKE_INSTALL_PREFIX=/usr -NO_DEFAULT_PATH ..                                  
abort: repository /var/pkgmk/work/eigen/src/eigen-eigen-6e7488e20373 not found!
abort: repository /var/pkgmk/work/eigen/src/eigen-eigen-6e7488e20373 not found!
-- Standard libraries to link to explicitly: none
-- searching for 'pkgconfig' directory in PKG_CONFIG_LIBDIR ( /usr/lib ), /usr/share, and /usr/lib
-- pkg_config_libdir_search directory /usr/lib
-- found /opt/lib/pkgconfig
-- Using GSL from /usr
-- Found Qt4: /usr/bin/qmake (found version "4.8.1")