[Bug target/106529] existence of sincos is assumed

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106529

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Thomas Klausner from comment #4)
> a) there is no conflict since there is no builtin or otherwise sincos()
> function
> b) it is not declared in math.h

As it says, it's a built-in function automatically recognized by GCC, which is
documented here:
https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html
With -std=c17 instead of the -std=gnu17 default that doesn't happen.

The warning is correct, GCC gives that special handling. You can use
-fno-builtin-sincos to disable the handling for this particular function, but
maybe that should be the default on NetBSD.


> the linker warning is correct though :)

Error, not warning :)