Developer(s) Erik Andersen
Initial release February 13, 2000 (2000-02-13)
Stable release (May 15, 2012 (2012-05-15)) [1]
Written in C
Operating system Linux
Platform Embedded Linux
License GNU LGPL[2]
Website .org.uclibcwww

In computing, uClibc is a small C standard library intended for Linux kernel-based operating systems for embedded systems and mobile devices. uClibc was created to support μClinux, a version of Linux not requiring a memory management unit and thus suited for microcontrollers (uCs; the "u" is a romanization of μ for "micro").[3]

Development on uClibc started around 1999.[4] uClibc was mostly written from scratch,[5] but has incorporated code from glibc and other projects.[6] The project lead is Erik Andersen, and the other main contributor is Manuel Novoa III. Licensed under the GNU Lesser General Public License, uClibc is free and open-source software.

uClibc is a wrapper around the system calls of the Linux kernel and μClinux.

uClibc is much smaller than the glibc, the C library normally used with Linux distributions. While glibc is intended to fully support all relevant C standards across a wide range of hardware and kernel platforms, uClibc is specifically focused on embedded Linux. Features can be enabled or disabled according to space requirements.

uClibc runs on standard and MMU-less Linux systems. It supports i386, x86-64, ARM (big/little endian), AVR32, Blackfin, h8300, m68k, MIPS (big/little endian), PowerPC, SuperH (big/little endian), SPARC, and v850 processors.

uClibc-ng[7] is a spin-off of uClibc that regularly provides a stable and tested release, which is more suitable for different software development processes.

See also


  1. ^ "µClibc News". µClibc. 2012-02-01. Retrieved 2012-03-24. 
  2. ^ "uClibc FAQ: Licensing". uclibc.org. Retrieved 11 July 2015. 
  3. ^ uClibc naming Accessed on February 10, 2008.
  4. ^ http://www.uclibc.org/copyright.txt
  5. ^ "History". uClibc FAQ. Retrieved 2007-06-19. 
  6. ^ "uClibc Changelog". Archived from the original on 2007-06-09. Retrieved 2007-06-19. pthreads support (derived from glibc 2.1.3's linuxthreads library) [...] Merged in the random number support (rand, srand, etc) from glibc. 
  7. ^ "uClibc-ng". uclibc-ng.org. Retrieved 11 July 2015. 

Further reading

  • Karim Yaghmour, Jon Masters, Gilad Ben-Yossef, Philippe Gerum (2008). Building Embedded Linux Systems (2 ed.). O'Reilly Media. pp. 115–127.  
  • von Hagen, William L. (2006). The Definitive Guide to GCC, Second Edition. Berkeley, CA: APress. pp. 290–297.  

External links

  • Official website
  • uClibc at Freecode
  • Comparison of C/POSIX standard library implementations for Linux