bug#74217: Bootstrapping Zig with no Binary Blobs

[Hilton Chain via Bug reports for GNU Guix <bug-guix@gnu.org>]

On Thu, 14 Nov 2024 09:05:41 +0800,
Hilton Chain wrote:
>
> On Thu, 14 Nov 2024 07:40:05 +0800,
> Hilton Chain wrote:
> >
> > I thought Zig was using lld as a library for linking.  Just looked at
> > src/link/Elf.zig, this is not true, it invokes ld.lld.
> >
> > I have more time today.  I'll test this out and see if lld-as-ld-wrapper can
> > also add glibc RUNPATH.
>
> Zig manages linking to libc seperately, if this approach works, we have to
> keep validate-runpath? off for Zig.  Reference to ld.lld can't be patched
> since it's both native-inputs (for building Zig) and inputs (for using the
> built Zig), maybe we can add a zig-toolchain (zig + lld-wrapper) later?

ld.lld is invoked in 'zig clang' route, sorry for the noise.

Currently I'm 1. modifying each-lib-rpath option of 'zig build'.  2. passing
libc to linker.  I'll write details on this when succeed.