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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/94586] trigd_lib.inc:84:28: error: implicit
 declaration of function 'fmaf'
Date: Thu, 16 Apr 2020 02:10:48 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94586

--- 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=3D94586
>=20
> --- 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 =3D cos(x)
> > end function foo
> foo (real(kind=3D16) & restrict x)
> {
> =C2=A0 real(kind=3D16) __result_foo;
>=20
> =C2=A0 __result_foo =3D __builtin_cosl (*x);
> =C2=A0 return __result_foo;
> }

This is what I anticipated after I sent the email.=20
With -fno-builtin, you'll get cosl, which you don't
have.  So, you'll need to figure out how to force=20
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).=