Support ARM64 Windows desktop

[jkunkee]

Is your suggestion related to a problem?
At present the Electron project does not support the new Windows 10 on ARM (ARM64 Win32) platform. One of its dependencies is Node.js, which also does not support it. This means that on these devices Electron apps run emulated which, with the complexity of Electron, means a suboptimal user experience.

Describe the solution you'd like
I would like Node.js to support Windows 10 on ARM. Ideally this would include any tweaks needed to make Electron embedding easier, and I would be pleased as punch to see Node.js host ARM64 Windows EXEs on its main page.

Describe alternatives you've considered
As mentioned earlier, Windows 10 on ARM includes an IA32 emulation layer that runs Node.js. This works well for many applications, but my prototype ARM64 build of Node.js runs much faster in significantly less memory.

[jkunkee]

Per my message to the mailing list, this is not a simple request, but it is one for which I'm willing to do most of the heavy lifting.

This was also discussed in the build repo: nodejs/build#1138

My prototyping branch is here:
https://github.com/jkunkee/node/tree/arm64

Branch with everything merged so it builds and passes tests:
https://github.com/jkunkee/node/tree/wip/arm64-merged-for-build

Node.js changes:

• OpenSSL configs (PR: openssl: add arm64 Windows config files #26001)
• Build system changes (PR: win, build: arm64 port script and doc changes #25995)
• Ingest GYP with MARMASM support (PR gyp, win: teach MSVS generator about MARMASM Items #26020 will be overwritten by tools: replace GYP with GYP3 #26620)
• Ingest NPM with node-gyp with ARM64 support (PR deps: cherry-pick ARM64 Windows changes to node-gyp #28604)
• Node.js v12 picks up deps: cherry-pick ARM64 Windows changes to node-gyp #28604 and deps, v8: strip out overly broad DLL Export annotations #28602

Bonus changes:

• Add convenience features to vcbuild.bat (PR: win, build: add arbitrary MSBuild flag option and binlog option #25994)
• Add ARM64 Windows to the native modules setup scripts suggested by node-gyp (PR: Add ARM64 Windows tool option felixrieseberg/windows-build-tools#176)

Needed deps updates:

• GYP MARMASM support
  • Upstream: msvs: add ARM64 build file generation refack/GYP3#23
  • node.js: gyp, win: teach MSVS generator about MARMASM Items #26020
  • optional node-gyp Add arm64 asm node-gyp#1679
• GYP ARM64 full native modules support
  • Upstream: msvs: Support ARM64 configuration platform refack/GYP3#33
  • node-gyp: msvs: Add support for Windows on Arm node-gyp#1739
• node-gyp - ARM64 support for tests' native modules (src: add arm64 to Windows native module compilation node-gyp#1655)
• node-gyp - ARM64 support for 3rd party native modules (configure: Enable ARM64 single-toolchain build on Windows node-gyp#1678)
• node-gyp - make release with above changes (issue Make release with ARM64 Windows support node-gyp#1764)
• NPM - ingest node-gyp with above changes (npm has taken node-gyp v5+)
• v8 to 7.3 (PR deps: update V8 to 7.3 #25852; ETA ~Mar 12)
• v8 7.3 patches for ARM64 Windows (Merge and backport tracked in discussion of PR deps: get new v8 building for ARM64 Windows #26087)
• OpenSSL
• ICU (upstream PR done: ICU-20382 ICU4C: pkgdata and genccode support ARM32 but not ARM64 on Windows unicode-org/icu#412; backport PR: deps: backport ICU fix for ARM64 Windows #26090)
• OpenSSL TLS regression fix (PR: deps: make VC-WIN config generation deterministic #27543 and deps: regenerate OpenSSL configs with fixed tooling #27544)
• V8_EXPORT_PRIVATE regression fix (deps, v8: strip out overly broad DLL Export annotations #28602)

[refack]

• GYP (necessary change not yet upstream)

What's needed from GYP?
Happy to accept PRs to https://github.com/refack/GYP

[jkunkee]

OpenSSL config PR: #26001

[jkunkee]

@refack, here you go: refack/GYP3#23

[jkunkee]

refack/GYP3#23 also submitted as #26020 so it can be merged sooner.

[jefgen]

FYI, @jkunkee the ARM64 change for ICU is here: unicode-org/icu#412, and the ICU issue/ticket is: ICU-20382.

[jkunkee]

(progress-tracking comment updated)

[jkunkee]

For those interested, my hope is for Electron 6 to support Windows 10 on ARM (natively, not via emulation). electron/electron#16876

[jkunkee]

[EDIT: merged info into earlier comment]