On 10/22/07, Johann Rost wrote: > Thanks for your answer. How can I create the "true" > library file "/usr/lib/libg2c.so" ? I assume you have a root permission for 'root' on your machine. Do a following sequence of commands: --> su - Now insert root's password --> cd /usr/lib/ --> ln -s /usr/lib/libg2c.so.0.0 libg2c.so This creates a soft link to a library. --> exit Then try to compile your code. If does not help - you will have to do a small intervention into makefiles, be prepared :) By the way, does somebody in this list know what may cause gcc to find shared libraries supplied with "-l" option during linking ? Thanks, regards, Dima.