ok, I'll tell you the story:
This project was born early in visual Fortran, the program creates graphs with these libraries, etc. .. I used these libraries under windows xp 32 so far, and also with CodeBlocks on Windows XP gives me the same problems. So from what I say is probably an incompatibility with the compiler and ask if I can rewrite the libraries to be compatible with gcc if I can give me the source that, as far as I have said, are written in OBJ and I saw it in minigw including this compiler. According to you the difference between these libraries and those compatible with the compiler may be just what compiler was compiled with these libraries, that is if they give me the source code and recompile I minigw the board using the compiler obj is feasible or is more complex it?
However, thanks very much for your help