from the gcc 4.2 branch.
The libraries in the gcc-4_2-branch remained under the LGPLv2.
The changes can be reproduced with the following command:
svn diff svn://gcc.gnu.org/svn/gcc/branches/gcc-4_2-branch/libstdc++-v3
-r 127959:135556
Reviewed by: mm
Approved by: jhb (mentor)
MFC after: 2 weeks