Hi d hongqian, > I want to know the version of gcc 's mean. For example: the gcc > 3.4.6, what's the difference between the 3.4.6 and 3.4.5. > and what's difference between 3.3.0 and 3.2.0 and what's the > difference between 3.0.0 and 4.0.0. Look at the GCC release notes. Using Google (for example), search for: release notes site:gcc.gnu.org > If I want to update my gcc, how many things should also be update > so that the system could be stable. q.v.: http://gcc.gnu.org/install/prerequisites.html HTH, --Eljay
