Dear Martinsm,

thank you very much for your kind help. It works! Just normal mesa works ok, I cannot link glut functions from the demo/osmesa.c example, but I do not need them really.
...

Hi,

I am using OpenGL almost 10 years for scientific data visualization of many (millions) of triangles and it is operated in our C home made sources via

glBegin(...); glVertex3fv(...);...