[Bug libfortran/94586] trigd_lib.inc:84:28: error: implicit declaration of function 'fmaf'

[sgk at troutmask dot apl.washington.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94586

--- Comment #20 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Thu, Apr 16, 2020 at 01:10:21AM +0000, dave.anglin at bell dot net wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94586
> 
> --- Comment #18 from dave.anglin at bell dot net ---
> On 2020-04-15 2:14 p.m., sgk at troutmask dot apl.washington.edu wrote:
> > What does -fdump-tree-original show for
> >
> > function foo(x)
> >    real(16) foo, x
> >    foo = cos(x)
> > end function foo
> foo (real(kind=16) & restrict x)
> {
>   real(kind=16) __result_foo;
> 
>   __result_foo = __builtin_cosl (*x);
>   return __result_foo;
> }

This is what I anticipated after I sent the email. 
With -fno-builtin, you'll get cosl, which you don't
have.  So, you'll need to figure out how to force 
gfortran to use 'q' suffixes instead of 'l'.  I don't
know how the frontend will handle this.  Using weak
references as you suggested in your other reply might
be the easily (if it worked).