I compiled ginac-1.5.7 with Microsoft Visual C++. You can find an account of my adventures on http://sourceforge.net/apps/mediawiki/ooo-imath/index.php?title=Installation... 10 of 57 tests passed (those that didn't usually crashed with a runtime error). Since I am not an expert programmer, I have no idea if my source code modifications are acceptable or "evil", and what it means if the tests don't pass. Have fun, Jan