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Musl libc.svg
Developer(s)Rich Felker (dalias) and others
Initial releaseFebruary 11, 2011; 7 years ago (2011-02-11)[1]
Stable release
1.1.20[2] / September 4, 2018; 3 months ago (2018-09-04)
Repository Edit this at Wikidata
Operating systemLinux 2.6 or later
Platformx86, x86 64, ARM, MIPS, Microblaze, PowerPC, powerpc64, x32, OpenRISC, s390x, SuperH
LicenseMIT License

musl is a C standard library intended for operating systems based on the Linux kernel, released under the MIT License.[3] It was developed by Rich Felker with the goal to write a clean, efficient and standards-conformant libc implementation.[4]


Musl was designed from scratch to allow efficient static linking and to have realtime-quality robustness by avoiding races, internal failures on resource exhaustion and various other bad worst-case behaviors present in existing implementations.[4] The dynamic runtime is a single file with stable ABI allowing race-free updates and the static linking support allows an application to be deployed as a single portable binary without significant size overhead.

It claims compatibility with the POSIX 2008 specification and the C11 standard.[5] It also implements most of the widely used non-standard Linux, BSD, and glibc functions.[citation needed]


Some Linux distributions that can use musl as the standard C library include Alpine Linux, Dragora 3, Gentoo Linux, OpenWRT,[6] Sabotage,[7] Morpheus Linux[8] and Void Linux.

See also[edit]


  1. ^ "musl - obsolete versions". 2017-10-31. Retrieved 2018-01-14.>
  2. ^ "musl - Download". 2018-09-04. Retrieved 2018-10-27.
  3. ^ Rich Felker et al. (2016-04-29). "COPYRIGHT". Retrieved 2016-09-26.
  4. ^ a b "Introduction to musl". 2016-04-21. Retrieved 2016-09-26.
  5. ^ "Compatibility". 2014-05-27. Retrieved 2016-09-26.
  6. ^ Fietkau, Felix (2015-06-15). "OpenWrt switches to musl by default". openwrt-devel. Retrieved 2016-09-26.
  7. ^ on GitHub
  8. ^ "morpheus:". Retrieved 2018-06-15.

External links[edit]

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