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Musl Libc 1.0 Is Going To Be Released Real Soon

Free Software

Published on 06 March 2014 10:51 AM EST
Written by Michael Larabel in Free Software
15 Comments

I've been informed by the musl development camp that they intend to release version 1.0 of their standard C library in the next few weeks.

The Musl standard library is known for being lightweight, fast, and free while being standard-conformant as a standard C library. A comparison against other libc implementations was done by the Musl project on this web-page. Musl was compared to uClibc, dietlibc, and eglibc.

Rich Felker of the Musl project wrote into Phoronix to share their press release that they are now in a code freeze ahead of the upcoming 1.0 release. With Musl 1.0 they have implemented all required interfaces for C99 and POSIX 2008 compatibility.
Musl libc enters freeze for milestone 1.0 release

March 5, 2014

Following three years of extensive development, testing, and cooperation with distributions and toolchain providers, the musl libc development team has declared a feature freeze in preparation for the release of musl 1.0. This milestone comes at a point where all required interfaces from C99 and POSIX 2008 have been implemented, well over 5000 packages have built successfully against musl, and a number of other compatibility and feature goals have been met.

Musl, pronounced like the word "mussel", is a project to create for Linux a new MIT-licensed implementation of the standard C library suitable for a full range of deployment environments, offering efficient static and dynamic linking support, lightweight code and low runtime overhead, strong fail-safe guarantees under correct usage, and correctness in the sense of standards conformance and safety. Musl is built on the principle that these goals are best achieved through simple code that is easy to understand and maintain.

Used alongside an existing Android userspace, musl bridges the gap between full-fledged Linux systems and Android, providing the necessary library foundation to run standard C and C++ software while retaining the license freedom developers have come to expect. Its permissive license, small size, and low memory footprint are advantages for other mobile computing and embedded uses too. A collection of build scripts and pre-built cross compiler binaries is provided through the musl-cross project, making it easy to get started.

Musl also serves as an alternative to the GNU C Library (glibc) on workstation and server class systems, offering comparable performance for most functionality, lighter and faster-starting programs, greatly simplified build and upgrade procedures, and a newly designed POSIX threads implementation that solves a number of longstanding race condition bugs present in glibc. Many of musl's earliest adopters have been alternative Linux distributions oriented towards desktop and server usage. These include distributions that have sprung up around musl development (Sabotage and Snowflake, among others), as well as several established distributions adding support for musl-based variants (Gentoo, OpenWRT) or switching entirely to musl as their core libc (Aboriginal, Alpine, Bedrock, Dragora).

More details on the project can be learned at musl-libc.org.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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