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From: "arsen at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/109814] [13/14 Regression] freestanding using cmath
 does not compile anymore
Date: Fri, 28 Jul 2023 10:54:49 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109814

--- Comment #13 from Arsen Arsenovi=C4=87 <arsen at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #12)

> I suppose we could enable <cmath> if hosted || newlib, but that wouldn't
> always be right because (IIUC) you can configure newlib without any of the
> libm functions. I suppose if you use such a newlib and then include <cmat=
h>
> that's your own fault and you get to keep both pieces.

that seems reasonable, though my thinking is that maybe we can bring newlib
closer to hosted in general.  it even features C buffered IO (AFAIU) and
malloc, so it could provide the stuff that 'blocks' other features from wor=
king
on freestanding (besides threading, presumably?  I'd need to check what exa=
ctly
newlib provides)=