ld.frankenstein

[Rafael Espíndola via llvm-commits]

I spoke too soon. There are still a fix test failures. I missed it the
previous time because I was using a reduced linker script :-(

Cheers,
Rafael


On 20 September 2016 at 13:53, Rafael Espíndola
<rafael.espindola at gmail.com> wrote:
> It is pretty annoying to check if a given linker script behaviour is
> intentional or not. I think there are two main factors contributing to
> it
>
> * It is not very well documented.
> * Linker scripts are responsible for a lot of the layout.
>
> The second part makes it difficult to reduce a case where bfd and gold
> work but lld does not. Running delta on a linker script will normally
> produce a case where it is just incidental that bfd and/or gold
> produce a working output.
>
> Given that, I think at least for now we need to depend a bit on
> integration testing. The last fixes I did on linker script handling
> were so that I could create a "frankenstein ld": lld, but with bfd's
> linker script.
>
> With r281989 it is now able to link all of llvm/lld/clang on x86_64
> and all tests pass :-)
>
> To use it, edit the attached script to point to the linker script you
> want and put it the same directory as ld.lld. Then run clang with
> -fuse-ld=frankenstein.
>
> Cheers,
> Rafael