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GNU C Library 2.21

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GPL (GNU General Public License)
Nov 30, -1
Submit date:
Feb 15, 2015
Roland McGrath
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GNU C Library 2.21

by Roland McGrath

The GNU C Library is an open source, free and powerful library software for any GNU/Linux distribution. It is also known as Glibc and required by any UNIX-like computer operating system. GNU C Library is in charge of defining the system calls, as well as various other basic functionality, such as malloc, open, exit, printf, etc.

Used by default in all Linux kernel-based operating systems

The GNU C Library is installed and used by default in all Linux kernel-based operating system, designed from the ground up to act as the main C library in GNU systems and any other operating system powered by the Linux kernel.

Designed to be portable

Glibc is a high performance C library, written entirely in the C programming language. It is designed to be portable, internationalized, and engineered to support all relevant standards, including POSIX.1-2008 and ISO C11.

Supports features of well known UNIX variants

While the GNU C Library has a fully internationalized interface, it tries to support features of well known UNIX variants, such as BSD and System V, thanks to its built-in compatibility modes.

Getting started with GNU C Library

While the GNU C Library is installed by default in almost all GNU/Linux operating systems, you can also reinstall it yourself using the source package distributed on its website or Softpedia free of charge. To begin, download and save the archive on your Home directory.

Unpack the archive with an archive manager utility, open a terminal window, go to the location where the archive files have been extracted, run the ‘./configure’ command to configure the program (see the ‘./configure --help’ command for various optimization options).

Then run the ‘make’ command to compile the library, which can be installed system wide by running either of the ‘make install’ or ‘sudo make install’ commands, depending if your root or a privileged user.


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