Re: libm -fno-builtin

[Jeff Johnston <jjohnstn at redhat dot com>]

I suggest it still be defaulted but a configuration switch added.
Platforms can override in configure.host to make their own
default or users can experiment with the option turned off/on if desired.
What builtins are provided for each platform and how well they work and how
they will affect the
build is unknown at this point.

-- Jeff J.

On Tue, Jun 26, 2018 at 4:22 AM, Corinna Vinschen <vinschen@redhat.com>
wrote:

> On Jun 25 11:44, Jeff Johnston wrote:
> > On Mon, Jun 25, 2018 at 9:27 AM, Corinna Vinschen <vinschen@redhat.com>
> > wrote:
> >
> > > On Jun 25 13:47, Jon Beniston wrote:
> > > > Hi Corinna,
> > > >
> > > > >Uhm... even more importantly, your patch is changing the configure
> > > files directly,
> > > > > rather than changing the configure.in files the configure files
> are
> > > generated from.
> > > > >
> > > > > For the patch, just change the configure.in files and send the
> below
> > > manual configure changes alongside
> > > >
> > > > -fno-builtin isn't in configure.in. Where does that come from?
> > >
> > > Huh, I didn't check before writing my reply, but in fact it's in
> > > acinclude.m4.  The line is unchanged since the dawn of time,
> > > AKA creation of the original sourceware CVS repo back in 2000.
> > >
> > > Jeff, any idea why it's there and if this is more than just a
> > > remnant of the dark ages?
> > >
> > >
> > I don't know the history of it.
>
> That's a bit disappointing.  However, just as Jon it's not clear to
> me how to proceed.  ANy input?
>
>
> Thanks,
> Corinna
>
> --
> Corinna Vinschen
> Cygwin Maintainer
> Red Hat
>