[bug#49471] [PATCH] gnu: lld: Update to 12.0.0.

["Ludovic Courtès" <ludo@gnu.org>]

Hi,

Leo Prikler <leo.prikler@student.tugraz.at> skribis:

> * gnu/packages/llvm.scm (llvm-subprojects-origin, %llvm-project-12.0.0-hash):
> New variables.
> (lld-11, lld-12): New variables.
> (lld): Point to lld-11.
> ---
> This patch is an alternative to the one sent by terramorpha.
>
> Supposed advantages of it are:
> * lld still points to lld-11, not breaking any packages that rely on it
> * llvm-subprojects-origin can be reused by other LLVM subprojects
>   (think of libcxx and libcxxabi, which both require each other, or
>   libunwind, which requires libcxx)
>
> Disadvantages are:
> * llvm-project is a beefy tarball and somewhat of a pain to unpack
> * Both this version and the original use an unclean approach to building
>   subprojects, that is propagated by LLVM.  Perhaps we ought to instead
>   clean up their mess?

I’m not sure that the 2nd point means, but perhaps it can be addressed
separately?

> -(define-public lld
> +(define-public lld-11
>    (package
>      (name "lld")
>      (version "11.0.0")

Does it make sense to keep old versions of the linker around?  To me
it’s much less useful than keeping old versions of the compiler.

> +(define %llvm-project-12.0.0-hash "0a1n88dmbwp1ww7h3ykf0s001cndk1bm3i2cj1y2sh548f4nilcy")
                                     ^
I’d use ‘base32’ here (for expansion-time base32 decoding) and remove it
from ‘llvm-subprojects-origin’.

Otherwise LGTM.

Thanks!

Ludo’.