Download musl

Git repository

The latest musl source is always available via the git revision control system. Efforts are made to keep the master branch in a state that not only compiles and works, but that works at least as well or better than the latest release.

The following command can be used to checkout a copy of the musl git repository:

$ git clone git://

Source and revision history are also browsable online via cgit.

Official releases

musl generally follows a time-based release cycle, with versions spaced roughly one to three months apart. Version numbering, however, is based on an evolving roadmap for particular compatibility and feature goals. Releases are timed so as to make fixes for major bugs available in release form as soon as possible while leaving ample time for testing after significant invasive changes.

Beginning with 1.1.7, releases are signed with the project GPG key. Its fingerprint is 8364 8929 0BB6 B70F 99FF DA05 56BC DB59 3020 450F and can be cross-checked against @musllibc on Twitter.

See below for release notes summaries and download links.

Current Versions

Mainline - 1.1.7

This series is actively developed but intended for use in production environments as long as appropriate testing is performed, and should be preferred whenever there is a need for supporting an arbitrary, expanding set of packages or environments.

musl-1.1.7.tar.gz (sig) - Mar 18, 2015

This release features support for alternate user/group database backends via the nscd protocol, an experimental AArch64 (64-bit ARM) port, overhauled POSIX AIO functionality that is cancellable and safe against close, and significant memset performance improvements on x86[_64]. The set*id() family of functions are now safer (including async-signal safety and safety against partial privilege-retention issues) in multi-threaded programs. Application compatibility improvements in getaddrinfo, getopt_long, and other functions have been made, and various additional low-impact bugs have been fixed.

Stable - 1.0.4

This series does not add new features and avoids changes that might affect building packages against musl or using applications in environments where they are already known to work. It is intended mostly for developers targetting a fixed profile of application software and kernel, such as in embedded development.

musl-1.0.4.tar.gz - Aug 1, 2014

This maintenance release brings the 1.0 branch up to date with all important bug fixes that have been applied to mainline as of 1.1.4. These include a major logic bug in memmem which yielded both false negatives and false positives, numerous issues that were specific to mips, powerpc, and microblaze, and various other lower-severity bugs.

Older versions

Earlier versions of musl have been moved to a separate page.