New math library from ARM

[Pedro Giffuni]

On 12/31/18 10:19 AM, Steve Kargl wrote:
> On Mon, Dec 31, 2018 at 10:06:57AM -0500, Pedro Giffuni wrote:
>> Hi;
>>
>> Just noted a recent initiative from musl-libc:
>>
>> https://www.openwall.com/lists/musl/2018/12/08/1
>>
>> It appears they plan to replace their (FreeBSD) math code with a new ARM
>> implementation:
>>
>> https://github.com/ARM-software/optimized-routines
>>
> The Copyright on this code is unclear.  For example, in
> single/e_rem_pio2.c  lines 1-6:
>
> /*
>   * e_rem_pio2.c
>   *
>   * Copyright (c) 1999-2018, Arm Limited.
>   * SPDX-License-Identifier: MIT
>   */
>
> Then lines 16-18:
>
>      /*
>       * Simple cases: all nicked from the fdlibm version for speed.
>       */
>
> The original fdlibm licenses applies ot the nicked lines.
>
They should have kept the original headers. That is why I personally 
dislike the idea of replacing licenses with SPDX tags.

We should probably report that upstream :(.

FWIW, they had originally adopted an Apache License and later they 
relicensed it under MIT, apparently with the idea of assigning the 
result to the FSF.

Pedro.