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From: "brechtsanders at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/108678] New: Windows on ARM64 platform target
 aarch64-w64-mingw32
Date: Sun, 05 Feb 2023 14:43:03 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108678

            Bug ID: 108678
           Summary: Windows on ARM64 platform target aarch64-w64-mingw32
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: brechtsanders at users dot sourceforge.net
  Target Milestone: ---

Are there plans to support Windows (using MinGW-w64) on ARM64?

The triplet for this platform should be: aarch64-w64-mingw32

I'm trying to build natively on a Windows on ARM device (bootstrapping from
LLVM/CLang).

Since binutils 2.40 there some support for aarch64 COFF/PE format, and I
already built a working binutils with the following supported targets:

ld --help|sed -n "s/^.*supported targets: //p"
pe-x86-64 pei-x86-64 pe-bigobj-x86-64 elf64-x86-64 pe-i386 pei-i386 elf32-i=
386
elf32-iamcu pdb elf64-little elf64-big elf32-little elf32-big pe-bigobj-i386
pe-aarch64-little pei-aarch64-little srec symbolsrec verilog tekhex binary =
ihex
plugin

So it looks like pe-aarch64-little and pei-aarch64-little are listed.

I'm don't know if a pe-bigobj-aarch64-little is needed or if it will be
supported in the future.

My first attempt to get gcc (I tried with source tarball 12.2.0) to configu=
re
was changing the following line in gcc/config.gcc:

i[34567]86-*-mingw* | x86_64-*-mingw*)

to:

i[34567]86-*-mingw* | x86_64-*-mingw* | aarch64-*-mingw*)

but then I get the following error:

Unknown tune used in --with-tune=3Dgeneric

What needs to be changed to get past that?=