[Scons-users] Add arm64ec support on Visual Studio

[Mats Wichmann]

On 7/12/25 10:35, Leonard de Ruijter wrote:
> Hi,
> 
> 
> Arm64ec is an architecture supported on Windows 11. In short, it runs 
> smooth on arm64 processors without emulation, but it is compatible with 
> x64. So you can load arm64ec dll's in x64 processes and vise versa, as 
> long as you're on an arm64 host system.
> 
> It is already possible to compile arm64ec on SCons by adding /ARM64EC to 
> ccflags and /machine:arm64ec to linkflags. However I think it would be 
> better to add arm64ec as a supported architecture directly in SCons 
> itself, and it should append to ccflags and linkflags itself.
> 
> Would you be open for a pull request that adds this?

Thanks for asking first - I know Bill feels that's a big deal :-)

Is this "emulation compatible" ABI a Windows-only thing (admit I'd never 
heard of it)?

It seems from glancing around a bit that llvm has made some effort to 
support it, too (mingw clang builds).

I don't know how any of this would map into what exists now, it might be 
just a few table updates or there might be more.

Maybe if you could share a few more details here (or use a github 
discussion) of what you'll propose before going all the way to a PR? 
Hate to see you prepare one and then have it sit because we "don't get it".