Mark Mitchell announced the availability of GCC 4.2.1 saying, "GCC 4.2.1 is a bug-fix release, containing fixes for regressions in GCC 4.2.0 relative to previous GCC releases." He went on to note that future versions of GCC will be released under a new license, "GCC 4.2.1 will be the last release of GCC covered by version 2 of the GNU General Public License. All future releases will be released under GPL version 3."

GCC is the GNU Compiler Collection which includes C, C++, Objective-C, Fortran, Java, and Ada compilers. Download GCC 4.2.1 from your nearest gcc.gnu.org mirror.