A GCC 4.2.1 binary release for mingw is available.

You can download it from:
https://sourceforge.net/project/showfiles.php?group_id=2435
under gcc-4

The binaries are archived by language.

There are two versions, differing in the model used for exception unwind
info.
 (1) Setjump-longjump (sjlj). Historically,and currently, the
     default model.
 (2) Dwarf2 table-based unwinding (dw2). The more efficient model. 

*This version is built with Dwarf 2 unwind info enabled. The gcc, g++
and
gfortran drivers in the bin directory have a '-dw2' suffix to indicate
that, You can remove '-dw2; from these files if you like. 

If you want sjlj you will find them (soon) in the gcc-4.2.1-sjlj-1
package

The binaries were compiled with --enable-version-specific-runtime-libs.
The runtime libs are in <mingw-root>/lib/gcc/mingw32/gcc-4.2.1-dw2. Do
not move these files. If you really must, don't bother reporting
installation bugs.

Please consider this package as experimental. 

To get core C compiler, download:

  gcc-core-4.2.1-dw2-1.tar.gz

To add on other languages, download one or more
of these (in addition to core):

  gcc-ada-4.2.1-dw2-1.tar.gz  
  gcc-g++-4.2.1-dw2-1.tar.gz
  gcc-gfortran-4.2.1-dw2-1.tar.gz
  gcc-objc-4.2.1-dw2-1.tar.gz

Extract the files, maintaining the directory structure, into your root
directory for mingw.

Be aware that some archive extracters do not preserve read-only
attributes of files. If you are installing the Ada component, please
check that the files in the /lib/gcc/mingw32/4.2.1-dw2/adainclude and
adalib
directories are flagged as read-only. This attribute is necessary to
prevent them from being deleted when using gnatclean to clean a project.

* libstdc++ and libgfortran require version 3.13 of mingw-runtime and
  w32api version 2.2 or higher. 

* This package does _not_ contain binutils, the mingw-runtime
  or the w32api. You will need to get these if you do not already
  have mingw installed.

* libstdc++ and libgfortran require version 3.13 of mingw-runtime and
  w32api version 2.2 or higher.  Yes, I've said it twice now.

* Static and dll libraries of libgcc and libstdc++ are in the release.
  By default, linkage is to static libraries.  More details later.

* OpenMP is enabled.  To use it you will need to have  win32-pthreads
  package installed. More details later.

This release contains:

1) Source distribution, with mingw-local patches incorporated: 
  gcc-4.2.1-1-src.tar.gz
  (This is the whole shebang. Maybe some day I'll have time to break
   up into language components.)

2) Binaries
  gcc-core-4.2.1-dw2-1.tar.gz
  gcc-ada-4.2.1-dw2-1.tar.gz  
  gcc-g++-4.2.1-dw2-1.tar.gz
  gcc-gfortran-4.2.1-dw2-1.tar.gz
  gcc-objc-4.2.1-dw2-1.tar.gz

3) gcc-4.2.1-build-dw2.sh, which is the script I used to configure
   and build.

4) This file.

Danny 
2007-08-07

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