Hi again, I also tries to use newer versioin of clib available with debian-2.2, but still the compilation does not work. The clib version used for debian-2.2 is 2.1.3 and in this release (of clib), sockaddr_in6 (defined in 'linux/in6.h') does not have sin6_scope_id field. I think one more check should be needed while configure to detect whether this field is defined in 'in6.h' or not. Any idea? Kiyo