On 29/07/2021 08:34, Richard Biener wrote:
On Wed, Jul 28, 2021 at 3:04 PM Andrew Stubbs <a...@codesourcery.com> wrote:
This patch follows up my previous patch and supports more variants of
LLVM 12.
There are still other incompatibilities with LLVM 12, but this at least
the ELF attributes should now automatically tune to any LLVM 9, 10, or
12 assembler (It would be nice if one set of options would just work
everywhere, but no).
LLVM 11 was not tested, but is broken in other ways in any case. LLVM 13
(dev) needs more work.
Unfortunately, the need for configure tests and the CLI instability
within the LLVM 12 release branch means that GCC probably needs to be
rebuilt whenever LLVM is upgraded, even for minor versions.
Is it possible to handle some incompatibilities with command line arguments
to llvm-mc in a wrapper script that could dispatch based on the
installed llvm-mc
version? Or maybe some specs magic that passes down -mllvm-mc-version=XYZ
from a %{llvm-mc-version} specs handler that somehow queries the installed
llvm-mc? Or is the llvm-mc version not enough to decide things? I realize this
still needs adjustments for each new llvm-mc version that pops up.
Hopefully things will stabilize and all this will become overkill, but
if not then we may have to consider some of those ideas.
Andrew
