[Mingw-users] Announcement: Experimental GCC-3.4.5 with Dwarf2-EH

[Danny S. <dan...@cl...>]

Experimental GCC 3.4.5 binaries for mingw, built with Dwarf2 exception
handling enabled, are available.

You can download them from:
https://sourceforge.net/project/showfiles.php?group_id=2435,
in the PROPOSED section, as  "GCC with Dwarf2-EH" release files.

The binaries are archived by language.

To get core C compiler, download:

  gcc-DW2-core-3.4.5-20060117-1.tar.gz

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

  gcc-DW2-g++-3.4.5-20060117-1.tar.gz
  gcc-DW2-g77-3.4.5-20060117-1.tar.gz
  gcc-DW2-objc-3.4.5-20060117-1.tar.gz

Sorry, I have left out java and ada for now.  Popular demand could
change that.


* 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++ requires version 3.0 or higher of mingw-runtime and
  w32api version 2.2 or higher.  The GNU extension class
  __gnu_cxx::stdio_sync_filebuf requires version 3.5 of the mingw-runtime
  (with large-file support) to resolve references to fseeko64.

* The Dwarf2-enabled libgcc.a uses weak declarations. You will need
   a recent binutils (2.16) to be able to handle these correctly at link
   time.

* Dwarf2 exception handling fails when functions that throw exceptions
  are used as callbacks from functions that have not been built with DW2
  EH tables. The W32API system libraries were not built with DW2. 
  
The new features of GCC 3.4 and bug-fixes om the gcc-3.4.x series are
documented in the GCC release notes at:

  http://gcc.gnu.org/gcc-3.4/

This release also incorporates a patch to fix a bug in the (undocumented
and win32-specific) feature of allowing exceptions to cross dll-exe
boundaries. The patch changes the structure used to share pointers to
global exception data and so introduces an ABI-incompatibility with
earlier gcc-3.4.x releases. This means that for C++ code that needs to
throw exceptions across dll boundaries, both exe and dll must be
compiled with the same version of gcc.

Source distributions, with mingw-local patches incorporated, are the
same as for the gcc-3.4.5 release candidate. The only difference
is in the configure options, which include -disable-sjlj-exceptions
for this build.  These sources are at:

http://prdownloads.sourceforge.net/mingw/gcc-core-3.4.5-20060117-1-src.tar.gz 

http://prdownloads.sourceforge.net/mingw/gcc-g++-3.4.5-20060117-1-src.tar.gz

http://prdownloads.sourceforge.net/mingw/gcc-g77-3.4.5-20060117-1-src.tar.gz

http://prdownloads.sourceforge.net/mingw/gcc-objc-3.4.5-20060117-1-src.tar.gz

Danny
2006-02-11