libm: sync with upstream.
There's potential here to maybe lose some/all of builtins.cpp, but I'll
look at that separately later.
Test: treehugger
Change-Id: I2c2bc1d0753affdd214daeb09fa1ac7cd73db347
diff --git a/libm/NOTICE b/libm/NOTICE
index 0c37b2b..64d253a 100644
--- a/libm/NOTICE
+++ b/libm/NOTICE
@@ -689,6 +689,14 @@
-------------------------------------------------------------------
+Copyright (c) 2005-2020 Rich Felker, et al.
+
+
+Please see https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
+for all contributors to musl.
+
+-------------------------------------------------------------------
+
Copyright (c) 2007 David Schultz
All rights reserved.
@@ -1173,6 +1181,32 @@
-------------------------------------------------------------------
+Copyright (c) 2017 Steven G. Kargl
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+ notice unmodified, this list of conditions, and the following
+ disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+-------------------------------------------------------------------
+
From: @(#)s_ilogb.c 5.1 93/09/24
====================================================
Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.