* Provide compilers using Windows and POSIX threads. The default setup uses Windows threads, thus avoiding the dependency on the pthreads DLL (Closes: #748353, #750741). * Use the default exception-handling (SJLJ on 32-bit Windows, SEH on 64-bit Windows). (With the above, LP: #1338043.) * Build a mingw32 transition package (Closes: #756142): - C++ code with interface/implementation pragmas links correctly (Closes: #179760); - libstdc++.la is no longer shipped (Closes: #281030); - the libstdc++ DLL is provided (Closes: #317146); - _NO_OLD_NAMES doesn't break unistd.h (Closes: #338412); - the gccbug manpage is no longer linked to (Closes: #351790); - the package description doesn't mention "freedom through obsolescence" (Closes: #403720); - g77 is provided (Closes: #418167); - nothing is installed in /usr/libexec (Closes: #470574); - Lintian overrides are correct (Closes: #470873); - powf and sinf can be used in the same project (Closes: #484299); - there's no "it's"/"its" typo in the Debian-specific files (Closes: #498400); - the package builds gcc 4.9 (Closes: #514186); - a 64-bit compiler is available (Closes: #514187); - powf is defined correctly (Closes: #525016); - no compilercache symlinks are shipped (Closes: #583262). * Ship the C++ header files in the default location instead of /usr/include/c++/; this avoids having to introduce a new package for the target-independent headers. * Remove obsolete gnat files.