有关QT桌面的问题

[windfantasy]

在编译QT桌面时出现的问题
[root@windfantasy qt-x11]# echo yes|./configure -no-xft

This is the Qt Free Edition.

You are licensed to use this software under the terms of either
the Q Public License (QPL) or the GNU General Public License (GPL).

Type 'Q' to view the Q Public License.
Type 'G' to view the GNU General Public License.
Type 'yes' to accept this license offer.
Type 'no' to decline this license offer.

Do you accept the terms of the license?
        /usr/lib/libGLU.so is a threaded library, Qt needs to be as well.

        This target is using the GNU C++ compiler (linux-g++).

        Recent versions of this compiler automatically include
        code for exceptions, which increase both the size of
        the Qt library and the amount of memory taken by your
        applications.

        You may elect to re-run ./configure with the -no-g++-exceptions
        option to compile Qt without exceptions.  This is
        completely binary compatible, and existing
        applications will continue to work (like KDE 2).


Build type:    linux-g++-shared

Thread support..................... no
GIF support........................ no
MNG support........................ no
JPEG support....................... no
OpenGL support .................... no
NAS sound support.................. no
Session management................. no《------问题在此
Xft support (Anti-Aliased Fonts) .. no
XKB support ....................... yes

Creating makefiles...
Qt is now configured for building. Just run make.
To reconfigure, run make clean and configure.
在实验室机器上“Session management”是“yes”哪位能帮忙解释一下