Hi, I would like to use CLN (and later Ginac) together with the Compiler Tools provided by Microsoft. I am working on a project, which is fixed to the Microsoft compiler for the Windows build. So I tried to build CLN with the help of cccl (see http://folti.blogs.balabit.com/2009/08/compiling-autoconfmake-using-sources....), which works great for most of the source. I had some problems with the small files, that are written in assembler, but I managed to compile them seperatly to create the .obj files needed for the shared library. After having compiled all files with the Microsoft compiler under cygwin, the link process fails with lots of undefined refs to core functions of cln. Most of them are located in the header files cl_low.h and cl_DS.h. But I cannot figure out, why the DLL build fails. Is anyone interested in the subject? I think, it would be a great thing to finally get CLN to work under Visual Studio. And I almost got it ... Please help me to get through it. Regards Christian -- Dipl.-Inform. Christian Stussak Martin-Luther-Universitaet Halle-Wittenberg Naturwissenschaftliche Fakultaet III Institut fuer Informatik Von-Seckendorf-Platz 1 06120 Halle (Saale) Phone +49 0345 55 24744 Email stussak@informatik.uni-halle.de Web http://www.informatik.uni-halle.de/~stussak