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... 56 of 57 tests passed. The one that didn't said: time_uvar_gcd.exe: timing univarite GCD GCD of relatively prime polynomials a and b degree(a) = 100, degree(b) = 50 mod_gcd : 1 5.96e-002 heur_gcd : 1 1.71e-002 sr_gcd: : 1 3.73e+001 Non-trivial GCD, degree(a) = 100, degree(b) = 100 mod_gcd : 51 1.70e-001 heur_gcd : 51 1.56e-002 heur_gcd (old) : 51 2.40e-001 sr_gcd: : 51 6.62e+000 sr_gcd (old) : 51 1.16e+001 Non-trivial GCD, degree(a) = 908, degree(b) = 908 mod_gcd : 1 1.66e+000 heur_gcd : 1 4.67e-001 Assertion failed: sfinder.found.size() == 1, file time_uvar_gcd.cpp, line 1621 Jan