Hi Giuseppe, I do not know the answer to your questions. I think it is off topic for this forum. (I do not say that to chastise. I say it because you may get faster, more knowledgeable, more accurate responses on a more appropriate forum.) You may want to try the MinGW / MSYS list for assistance: mingw-users (at) lists (dot) sourceforge (dot) net Information about that forum at: http://www.mingw.org/about HTH, --Eljay