Apple Silicon support (it builds local too)

[hannesa2]

Because there is no M1 runner, currently only a local build is possible.
It's based on #15

[hannesa2]

This local build work on my side

[claytonrcarter]

I don't know much about xcode or these builds, but the link you posted me to UTM was very help to getting CI set up for gitx. FWIW, they appear to be building for arm64, and it looks like they're doing it via the build matrix and explicitly passing -arch ${{ matrix.arch }} to xcodebuild. Something like this:

      matrix:
        arch: [ x86_64 ]
        xcode: [ Xcode_12.5, Xcode_13.1, Xcode_13.2.1, Xcode_13.0, Xcode_12.4 ]
        include:
          - arch: arm64
            xcode: Xcode_13.2.1
...
      - name: Build project
        run: xcodebuild -workspace ObjectiveGitFramework.xcworkspace -scheme "ObjectiveGit Mac" -arch ${{ matrix.arch }} archive

I'm sure they're more to it, but perhaps this might be helpful?

[claytonrcarter]

Actually, they're doing 2 builds:

• the matrix arch build at https://github.com/utmapp/UTM/blob/master/.github/workflows/build.yml#L73
• a universal build at https://github.com/utmapp/UTM/blob/master/.github/workflows/build.yml#L117

Both of those call into https://github.com/utmapp/UTM/blob/master/scripts/build_utm.sh, which looks like it ends up calling xcodebuild with -arch x86_64 -arch arm64 for the universal build. (ie it passes both -arch flags)

Again, I'm in over my head on this, and I don't even use an M1, but perhaps this will be helpful to you.

[claytonrcarter]

These all appear to be lists of locations to search. Instead of changing /usr/local/opt/openssl/lib to /opt/homebrew/opt/openssl/lib, can you just add it (to all of these locations) so that both are present? That way way the linker might be able to build using /usr/local/opt/openssl/lib but then load /opt/homebrew/opt/openssl/lib @ runtime. Perhaps this could help us get the gitx CI builds to run on x86 and M1?

[claytonrcarter]

What about trying something like -lssh2, -L/usr/local/lib, -L/opt/homebrew/lib in these OTHER_LDFLAGS declarations?

[hannesa2]

Nothing was here successful.
I asked at

• https://developer.apple.com/forums/thread/700085 and
• https://stackoverflow.com/questions/71041332/xcode-architecture-independent-ldflags-arm64-x86-apple-silicon-m1

[claytonrcarter]

Well, I'm glad you got something to work.

[hannesa2]

I moved to similar approach like with libgit2.a and it build locally with M1 as well.
If we find a better solution, we can change this anytime