The Julia language is licensed under the MIT License. The "language" consists of the compiler (the contents of src/), most of the standard library (base/), and some utilities (most of the rest of the files in this repository). See below for exceptions. > Copyright (c) 2009-2019: Jeff Bezanson, Stefan Karpinski, Viral B. Shah, > and other contributors: > > https://github.com/JuliaLang/julia/contributors > > Permission is hereby granted, free of charge, to any person obtaining > a copy of this software and associated documentation files (the > "Software"), to deal in the Software without restriction, including > without limitation the rights to use, copy, modify, merge, publish, > distribute, sublicense, and/or sell copies of the Software, and to > permit persons to whom the Software is furnished to do so, subject to > the following conditions: > > The above copyright notice and this permission notice shall be > included in all copies or substantial portions of the Software. > > THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, > EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF > MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND > NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE > LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION > OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION > WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Julia includes code from the following projects, which have their own licenses: - [crc32c.c](https://stackoverflow.com/questions/17645167/implementing-sse-4-2s-crc32c-in-software) (CRC-32c checksum code by Mark Adler) [[ZLib](https://opensource.org/licenses/Zlib)]. - [LDC](https://github.com/ldc-developers/ldc/blob/master/LICENSE) (for ccall/cfunction ABI definitions) [BSD-3]. The portion of code that Julia uses from LDC is [BSD-3] licensed. - [LLVM](https://releases.llvm.org/3.9.0/LICENSE.TXT) (for parts of src/jitlayers.cpp and src/disasm.cpp) [BSD-3, effectively] - [MUSL](https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT) (for getopt implementation on Windows) [MIT] - [MINGW](https://sourceforge.net/p/mingw/mingw-org-wsl/ci/legacy/tree/mingwrt/mingwex/dirname.c) (for dirname implementation on Windows) [MIT] - [NetBSD](https://www.netbsd.org/about/redistribution.html) (for setjmp, longjmp, and strptime implementations on Windows) [BSD-3] - [Python](https://docs.python.org/3/license.html) (for strtod and joinpath implementation on Windows) [BSD-3, effectively] - [Google Benchmark](https://github.com/google/benchmark) (for cyclecount implementation) [Apache 2.0] The following components included in Julia `Base` have their own separate licenses: - base/ryu/* [Boost] (see [ryu](https://github.com/ulfjack/ryu/blob/master/LICENSE-Boost)) - base/grisu/* [BSD-3] (see [double-conversion](https://github.com/google/double-conversion/blob/master/LICENSE)) - base/special/{exp,rem_pio2,hyperbolic}.jl [Freely distributable with preserved copyright notice] (see [FDLIBM](https://www.netlib.org/fdlibm)) The Julia language links to the following external libraries, which have their own licenses: - [FEMTOLISP](https://github.com/JeffBezanson/femtolisp) [BSD-3] - [LIBUNWIND](https://git.savannah.gnu.org/gitweb/?p=libunwind.git;a=blob_plain;f=LICENSE;hb=master) [MIT] - [LIBUV](https://github.com/joyent/libuv/blob/master/LICENSE) [MIT] - [LLVM](https://releases.llvm.org/6.0.0/LICENSE.TXT) [BSD-3, effectively] - [UTF8PROC](https://github.com/JuliaStrings/utf8proc) [MIT] Julia's `stdlib` uses the following external libraries, which have their own licenses: - [DSFMT](http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/SFMT/LICENSE.txt) [BSD-3] - [OPENLIBM](https://github.com/JuliaMath/openlibm/blob/master/LICENSE.md) [MIT, BSD-2, ISC] - [GMP](https://gmplib.org/manual/Copying.html#Copying) [LGPL3+ or GPL2+] - [LIBGIT2](https://github.com/libgit2/libgit2/blob/development/COPYING) [GPL2+ with unlimited linking exception] - [CURL](https://curl.haxx.se/docs/copyright.html) [MIT/X derivative] - [LIBSSH2](https://github.com/libssh2/libssh2/blob/master/COPYING) [BSD-3] - [MBEDTLS](https://tls.mbed.org/how-to-get) [either GPLv2 or Apache 2.0] - [MPFR](https://www.mpfr.org/mpfr-current/mpfr.html#Copying) [LGPL3+] - [OPENBLAS](https://raw.github.com/xianyi/OpenBLAS/master/LICENSE) [BSD-3] - [LAPACK](https://netlib.org/lapack/LICENSE.txt) [BSD-3] - [PCRE](https://www.pcre.org/licence.txt) [BSD-3] - [SUITESPARSE](http://suitesparse.com) [mix of LGPL2+ and GPL2+; see individual module licenses] Julia's build process uses the following external tools: - [PATCHELF](https://nixos.org/patchelf.html) - [OBJCONV](https://www.agner.org/optimize/#objconv) Julia bundles the following external programs and libraries: - [7-Zip](https://www.7-zip.org/license.txt) - [ZLIB](https://zlib.net/zlib_license.html) On some platforms, distributions of Julia contain SSL certificate authority certificates, released under the [Mozilla Public License](https://en.wikipedia.org/wiki/Mozilla_Public_License).