The msp430-gcc package is:

* Derived from the official GNU gcc-4.4.3.tar.gz available on any
  GNU mirror, such as http://mirrors.dotsrc.org/gnu/gcc/gcc-core-4.4.3.tar.gz
  and http://mirrors.dotsrc.org/gnu/gcc/gcc-g++-4.4.3.tar.gz

* Includes mspgcc4 patches from mspgcc.sf.net.  mspgcc.sf.net maintains much of
  its changes to the gcc as a sparse tree for each version.  The dpatch patch
  named debian/patches/ports-gcc-4.x.dpatch contains the modifications to
  standard gcc-4.3.3 as a result of applying the mspgcc sparse tree from their
  CVS checked out at date 2008-08-19.  mspgcc CVS is available via pserver at
  anonymous@mspgcc.cvs.sourceforge.net:/cvsroot/mspgcc in the gcc-4.x module.

* The dpatch patch named debian/patches/gcc-4.4.3.dpatch contains the patch
  also provided in mspgcc.sf.net in the packaging module in patches/.