Don't know if the the default glibc in Debian ("libc6") supports NPTL, for sure seems that "libc6-i686" does it...
Hello Andrea,yes, I know, that's why I installed libc-i686 which is supposed to coexist with libc6. But I must be be doing something wrong, as apparently, I can't use named semaphores which are supported by the NPTL.
Thanks, Viktor.