Hi boosters, On WinXP32 I'm using the gcc-4.3.0 released as an alpha version by the mingw folks. The alpha status is AFAIK because it has to tested to some extend before it can be considered stable. Installing this compiler and make it work AFAIK doesn't work with any of the .exe mingw installer. The mingw-runtime, binutils etc. have to be downloaded an extracted by hand. Additionally the c++config.h should be altered to not performing concepts checks, since this isn't enabled in any linux-distro I know. I've done that and got the mingw folder packed as and 180MB sized .tgz . While I'm not recommending compiling anything for production, it might be helpful for the library authors working on windows and want to check if their code works. Is there interest by the windows centric authors to get it and are the boost-consulting people willing to host such a package at their servers? Best, -- Maik