http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52853
--- Comment #6 from Bastien Montagne <montagne29 at wanadoo dot fr> 2012-04-04 11:08:45 UTC --- Bah, it’s not my day :/ Now it appears the error was on our side – quoting commit r45392 on blender svn (ten minutes ago): "fix for building on linux with gcc4.7, an error was caused by undefining __cplusplus, so as to work with mingw4.4" So this report can be closed, I think. Sorry for the noise.