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1rust-lang/libm as a whole is available for use under the MIT license:
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226------------------------------------------------------------------------------
227
228This Rust library contains the following copyrights:
229
230    Copyright (c) 2018 Jorge Aparicio
231
232Portions of this software are derived from third-party works licensed under
233terms compatible with the above MIT license:
234
235* musl libc https://www.musl-libc.org/. This library contains the following
236  copyright:
237
238      Copyright © 2005-2020 Rich Felker, et al.
239
240* The CORE-MATH project https://core-math.gitlabpages.inria.fr/. CORE-MATH
241  routines are available under the MIT license on a per-file basis.
242
243The musl libc COPYRIGHT file also includes the following notice relevant to
244math portions of the library:
245
246------------------------------------------------------------------------------
247Much of the math library code (src/math/* and src/complex/*) is
248Copyright © 1993,2004 Sun Microsystems or
249Copyright © 2003-2011 David Schultz or
250Copyright © 2003-2009 Steven G. Kargl or
251Copyright © 2003-2009 Bruce D. Evans or
252Copyright © 2008 Stephen L. Moshier or
253Copyright © 2017-2018 Arm Limited
254and labelled as such in comments in the individual source files. All
255have been licensed under extremely permissive terms.
256------------------------------------------------------------------------------
257
258Copyright notices are retained in src/* files where relevant.
259