[gentoo-musl] Re: Self-hosting Clang-based (libc++, musl libc) stage4

[Jens Staal]

On Sat, May 13, 2017 at 12:01:04PM +0200, Michał Górny wrote:
> On nie, 2017-05-07 at 11:19 +0200, Jens Staal wrote:
> > On Sun, May 07, 2017 at 09:27:41AM +0200, Michał Górny wrote:
> > > On nie, 2017-05-07 at 08:05 +0200, Jens Staal wrote:
> > > > - it would be really cool if an "official" custom crt package for
> > > >   llvm/clang could be in portage
> > > >
> > >
> > > This is something I really look forward to adding. Any suggestion on
> > > which crt implementation to use?
> > >
> > > I know that glibc provides crt1/i/n. Does musl provide them too, or does
> > > it need a more complete crt* set?
> > >
> > > --
> > > Best regards,
> > > Michał Górny
> >
> > musl itself does not provide crt* as far as I know, but I downloaded the
> > relevant files from ELLCC, which is a musl/libc++ LLVM/clang toolchain
> >
> > http://ellcc.org/viewvc/svn/ellcc/trunk/libecc/src/musl/crt/
> >
> > Those crt files originate from NetBSD and googling for crt
> > implementations often point to the NetBSD variants as drop-in
> > replacements of libgcc.
> >
>
> To be honest, I'm not sure if this is complete enough as useful
> replacement. For reference, the implementation submitted for compiler-rt
> was a little larger, and still wasn't considered good enough [1].
>
> [1]:https://reviews.llvm.org/D28791
>
> --
> Best regards,
> Michał Górny

I just know that it works on my experimental system. Perhaps there are
additional stuff needed for corner cases that I have not yet
encountered...

(hobbyist learning-by-doing so might be obvious things that I have
missed)

I have rebuilt @world several times (and llvm/clang), built llvm-patched linux on this gcc-free system.