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Date:	Wed, 29 Jan 2020 18:57:15 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: headache on build repeatibility: octave vs BLODA ?
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On Jan 30 01:08, Takashi Yano wrote:
> On Wed, 29 Jan 2020 16:34:28 +0100
> Corinna Vinschen wrote:
> > On Jan 29 16:32, Corinna Vinschen wrote:
> > > On Jan 29 22:46, Takashi Yano wrote:
> > > > --- m4/fseeko.m4.orig   2020-01-29 21:39:37.280507900 +0900
> > > > +++ m4/fseeko.m4        2020-01-29 21:36:29.263747100 +0900
> > > > @@ -30,16 +30,19 @@
> > > >      HAVE_FSEEKO=3D0
> > > >    else
> > > >      if test $WINDOWS_64_BIT_OFF_T =3D 1; then
> >=20
> > This makes me a bit suspicious... it looks like a check only
> > required for native builds, not for Cygwin.
>=20
> I think REPLACE_FSEEKO is set to 1 not here,
>=20
> > > >      m4_ifdef([gl_FUNC_FFLUSH_STDIN], [
> > > >        gl_FUNC_FFLUSH_STDIN
> > > >        case "$gl_cv_func_fflush_stdin" in
> > > >          *yes) ;;
> > > > -        *) REPLACE_FSEEKO=3D1 ;;
> > > > +        dnl *) REPLACE_FSEEKO=3D1 ;;
> > > > +        *) REPLACE_FSEEKO=3D0 ;;
> > > >        esac
>=20
> but here.
>=20
> gl_cv_func_fflush_stdin is set here in configure by:
>=20
> if ac_fn_c_try_run "$LINENO"; then :
>   gl_cv_func_fflush_stdin=3Dyes
> else
>   gl_cv_func_fflush_stdin=3Dno
> fi
>=20
> and the test code for this decision is as attached. conftest.c
> returns 0 in cygwin 3.0.7, while cygwin with commit 59362c80e3a
> returns 5.
>=20
> I am not sure why segfault occurs if fseeko is replaced.
> Probably due to a bug in octave or cygwin.

Thanks, that was very helpful.  I'll revert commit 59362c80e3a0.


Corinna

--=20
Corinna Vinschen
Cygwin Maintainer

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