Hermes does not build for React Native macOS on ARM64

[Saadnajmi]

Bug Description

• I have run gradle clean and confirmed this bug does not occur with JSC

Hermes version: 0.5.1
React Native version (if any):
OS version (if any): macOS 11.3.1
Platform (most likely one of arm64-v8a, armeabi-v7a, x86, x86_64): macOS on arm64 (AKA, an M1 Mac mini

Steps To Reproduce

1. Clone the react-native-macos repo (https://github.com/microsoft/react-native-macos)
2. Setup RNTester & open Xcode project (yarn && cd RNTester && pod install && open RNTesterPods.xcworkspace)
3. Try to build RNTester-macOS for Target "My Mac" (in my case it's am M1 Mac mini)

The Expected Behavior

It builds successfully

Actual Behavior

Several Errors:

[Saadnajmi]

Cross reference microsoft/react-native-macos#781

[Saadnajmi]

Looks like this will be fixed by #475 =)

[Huxpro]

@Saadnajmi Hey yes it's a KP and you've found the PR correctly. We are going to merge it soon but you'll need to upgrade to RN 0.65 and Hermes 0.8 to be able to use it ;)

[Saadnajmi]

@Huxpro Oh hey, I recognize you from the Callstack podcast! Noted, why do we need to be on RN 0.65? Would it not work with 0.63 or 0.64?

[Huxpro]

@Saadnajmi 😛

why do we need to be on RN 0.65? Would it not work with 0.63 or 0.64?

We may try to cherry-pick this fix to Hermes 0.7 and make a patch release (e.g. 0.7.3) for RN 0.64 (likely to work). I'm not sure how to make #475 working on Hermes 0.5 since the code changed was not even there back to 0.5. 🤔 cc @alloy.

I thought RN macOS 0.64 had released (from the https://microsoft.github.io/react-native-windows/) but from https://github.com/microsoft/react-native-macos/releases it seems not?

[Saadnajmi]

@Huxpro Yep! We're not caught up yet on RN-macOS😅.
I was mostly curious what the difference was between versions. Good to know there's a dependency. Thanks for the info!