Re: bootstrap fails on Debian ppc64 with fatal error: bits/libc-header-start.h: No such file or directory

[Jonathan Wakely <jwakely.gcc@gmail.com>]

On Sat, 14 May 2022 at 00:22, Dennis Clarke <dclarke@blastwave.org> wrote:
>
>
> >>> Honestly, I find that hard to believe.
> >>
> >> Me too!
> >>
> >>>
> >>> One or the other is needed. If you need both, I think you're the only
> >>> person in the world who needs that.
> >>>
> >>
> >> Not bloody likely right?  I am looking into that and I think the real
> >> issue is that the versions wanted in the source tree must be the same as
> >> the stuff dragging in by the script kicker download_prerequisites :
> >>
> >>       https://gcc.gnu.org/install/prerequisites.html
> >>
> >>       The in-tree build is only supported with the GMP version that
> >>       download_prerequisites installs.
> >
> > Right, you should be using that script.
> >
> > https://gcc.gnu.org/wiki/InstallingGCC
> >
>
> Well what difference does it make anyways?
> The correct versions are the correct versions.

Well you keep running into problems doing things your way, so I'm
suggesting you just use the well-tested route that is known to work.

>
> > Or (as that page says) just install the debian packages and stop
> > installing them by hand.
>
> But I want to have the libs around as fully non-optimized and no
> assembly single steppable debug enabled full of goodness. Which I
> can certianly do.
>
>
> >> However what do I know? There is another page that says do a bootstrap4
> >> for extra spice and flavour in your result. That doesn't fly.
> >
> > Well stop trying to do weird stuff and just Keep It Simple.
> >
>
> That just drains the joy out of everything.

OK, I'll leave you to it then, have fun.

> >> Okay so it needs 'wget'. Fine. Easy to fix that.
> >
> > It uses curl instead if wget is not found. Most people have one or the
> > other already installed.
>
> Yeah, I prefer curl. Regardless ...
>
> >
> >> Same stuff I use however the mpfr *needs* a patch.
> >
> > Eh? Why?
>
> Those folks working on gmp and mpfr really are the experts. The page
> says :
>
>      https://www.mpfr.org/mpfr-current/#download
>
>      The bugs listed below have been fixed (latest update: 2021-05-17).
>
>      See https://www.mpfr.org/mpfr-current/#fixed
>
> Thirteen bug fixes and from what I have heard directly from some good
> folks the code in GMP has been subjected to an actual proof. The MPFR
> code is in process. I gather those bug fixes are valuable and trivial
> to apply. In fact the download_prerequisites script could be updated
> to fetch the patches and just apply them.

They don't affect the code GCC uses.