GCC 4.2 Release Series
Changes, New Features, and Fixes

Caveats

General Optimizer Improvements

New Languages and Language specific improvements

C family

C++

Runtime Library (libstdc++)

Fortran

Java (GCJ)

New Targets and Target Specific Improvements

IA-32/x86-64

SPARC

M32C

MIPS

IA-64

HPPA

Obsolete Systems

Documentation improvements

PDF Documentation

Other significant improvements

Build system improvements

Incompatible changes to the build system