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From: "mehdi.chinoune at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rust/109853] New: WIN64 is a predefined constant on GCC
 MinGW-w64
Date: Sun, 14 May 2023 12:22:01 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: rust
X-Bugzilla-Version: 13.1.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109853

            Bug ID: 109853
           Summary: WIN64 is a predefined constant on GCC MinGW-w64
           Product: gcc
           Version: 13.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rust
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mehdi.chinoune at hotmail dot com
                CC: dkm at gcc dot gnu.org, gcc-rust at gcc dot gnu.org
  Target Milestone: ---

Building rust on MinGW-w64 fails because rust uses WIN64 as member of ABI e=
num
in gcc/rust/util/rust-abi.h
```
...
enum ABI
{
  UNKNOWN,
  RUST,
  INTRINSIC,
  C,
  CDECL,
  STDCALL,
  FASTCALL,
  WIN64,
  SYSV64
};
...
```
WIN64 is a defined to 1 on MinGW-w64
```
$ echo | gcc -dM -E - | grep WIN64
#define _WIN64 1
#define __WIN64 1
#define __WIN64__ 1
#define WIN64 1
```
So, Please consider choosing a different name for Windows ABI.=