Wrong unconditional dependency on nanl
Corinna Vinschen
vinschen@redhat.com
Wed Oct 10 16:05:00 GMT 2018
On Oct 10 17:31, Corinna Vinschen wrote:
> On Oct 10 11:22, Craig Howland wrote:
> > On 10/10/2018 10:52 AM, Corinna Vinschen wrote:
> > > On Oct 10 15:48, Christophe Lyon wrote:
> > > > On Wed, 10 Oct 2018 at 11:41, Corinna Vinschen <vinschen@redhat.com> wrote:
> > > > > On Oct 8 15:06, Christophe Lyon wrote:
> > > > >
> > > > It does help on aarch64-elf, but a change to rdimon.specs is required
> > > > because libc now depends on libm: this can be seen when compiling a
> > > > C++ hello.cpp.
> > > Hmm, that's an interesting point. What I don't understand is why this
> > > dependency wasn't already visible before. strtod.c and wcstod.c call
> > > nan() and nanf(), vfprintf.c and vfwprintf.c call nanf(). Why is a
> > > call to nanl() different?
> > The nanl() call was only added perhaps a few weeks ago. At that time we
> > missed the thought that it comes from libm. We'd need to add it to
> > newlib/Makefile to be copied like s_nan and sf_nan presently are.
>
> Yeah, just found this myself. nan/nanf are pulled in via newlib's
> top-level Makefile.am:
>
> MATHOBJS_IN_LIBC = ...
>
> Pulling in nanl is a problem because it's build depends on
> HAVE_LONG_DOUBLE.
>
> Maybe we should really just use __builtin_nanl in strtorx.c...?
...and build strtorx.c only if HAVE_LONG_DOUBLE, just like strtold.c and
wcstold.c.
Corinna
--
Corinna Vinschen
Cygwin Maintainer
Red Hat
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