Error: Package: glibc-common-2.15-37.fc17.i686 (@anaconda-0)
       Requires: glibc = 2.15-37.fc17
       Removing: glibc-2.15-37.fc17.i686 (@anaconda-0)
           glibc = 2.15-37.fc17
       Updated By: glibc-2.15-57.fc17.i686 (updates)
           glibc = 2.15-57.fc17
       Removing: glibc-2.15-56.fc17.i686 (installed)
           glibc = 2.15-56.fc17
       Updated By: glibc-2.15-57.fc17.i686 (updates)
           glibc = 2.15-57.fc17

uname -a
Linux laptop 3.3.4-5.fc17.i686.PAE #1 SMP Mon May 7 17:37:39 UTC 2012 i686 i686 i386 GNU/Linux

yum clean all

yum upgrade

yum install gcc