On Thu, 2002-12-12 at 16:15, Ahmed A wrote: > What do you mean by check, how do I check them. Uh they are defines... look in features.h. You can do something like: #include <features.h> ... printf("glibc: %d.%d\n", __GLIBC__, __GLIBC_MINOR__); If you just want to know what version is installed on a particular machine then just look in /lib: /lib/libc-2.3.1.so /lib/libc.so.6 -> libc-2.3.1.so So I have glibc 2.3.1 installed. Robert Love -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/