http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50914
--- Comment #1 from jdasu86 at gmail dot com 2011-10-29 19:08:39 UTC --- I want to install ns-2.34 which requires gcc-4.3.0 but I am having gcc-4.6.0 in fedora 15. So I tried to install gcc-4.3.0, taht reported me above mentioned bug.