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From: Florian Weimer <fweimer@redhat.com>
To: GT <tnggil@protonmail.com>
Cc: Bill Schmidt <wschmidt@linux.ibm.com>,  "libc-alpha\@sourceware.org" <libc-alpha@sourceware.org>
Subject: Re: PPC64 libmvec sincos/sincosf ABI
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Date: Thu, 08 Aug 2019 15:56:00 -0000
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* GT:

> ./tst_sincos.c: In function =E2=80=98main=E2=80=99:
> ./tst_sincos.c:15:5: warning: implicit declaration of function =E2=80=98s=
incos=E2=80=99 [-Wimplicit-function-declaration]
>      sincos (a[i], &b[i], &c[i]);
>      ^~~~~~
> ./tst_sincos.c:15:5: warning: incompatible implicit declaration of built-=
in function =E2=80=98sincos=E2=80=99
> ./tst_sincos.c:15:5: note: include =E2=80=98<math.h>=E2=80=99 or provide =
a declaration of =E2=80=98sincos=E2=80=99
> ./tst_sincos.c:2:1:
> +#include <math.h>

For sincos, you currently need to build with _GNU_SOURCE.  (I don't get
a vector call for this, though.)

We should probably make sincos etc. available by default because these
functions are widely available elsewhere.

Thanks,
Florian