The GNU C Library

　　Any Unix-like operating system needs a C library: the library which defines the ``system calls‘‘ and other basic facilities such as open, malloc, printf, exit...

The GNU C Library is used as the C library in the GNU systems and most systems with the Linux kernel.

index : http://www.gnu.org/software/libc/

manual:  https://www.gnu.org/software/libc/manual/html_node/index.html#toc_Top

download: http://ftp.gnu.org/gnu/glibc/

原文：http://www.cnblogs.com/iclk/p/3929839.html