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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/96168] GCC support for Apple Silicon (Arm64) on macOS
 requested
Date: Sun, 12 Jul 2020 00:48:01 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96168

--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Keno Fischer from comment #8)
> Is there a list of all the things that need doing? I don't know very much
> about how GCC is architected (but am familiar with LLVM,MachO,Aarch64 ISA,
> etc), but from my naive point of view, at least
>=20
> - Add all the ARM64 MachO relocations
GCC does not output macho files directly, so this part is just printing.

> - Add special cases for the Aarch64 ABI differences on Apple platforms
This one should be the majority of the work really.

> - Implement parsing/(& printing?) for Apple's assembly dialect
The printing part is part of GCC, GCC has support for alternative dialect t=
hat
can be used here.

> - Add CPU models for the relevant chips
You don't need this to start out with really, since ARMv8.3-a is backwards
compatiable with ARMv8-a.  You could default the arch to armv8.3-a if you w=
ant.=