[Bug] CGO_ENABLED on macos amd64 is not correct

[timandy]

Description:
A clear and concise description of what the bug is.

Action version:
actions/setup-go@v5

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:
go 1.18
go 1.19

Repro steps:

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: ${{ matrix.go }}

      # darwin
      - name: 'Test on [darwin] arch [amd64]'
        if: ${{ matrix.os == 'darwin' && contains(fromJson('["amd64"]'), matrix.arch) }}
        env:
          GOOS: ${{ matrix.os }}
          GOARCH: ${{ matrix.arch }}
        run: |
          echo ${CGO_ENABLED}   //print empty
          go env CGO_ENABLED //print 0 - should be 1

Expected behavior:
go env CGO_ENABLED //should be 1

Actual behavior:
printed 0, On windows and linux print 1

mac
https://github.com/timandy/routine/actions/runs/8965563348/job/24619393933#step:4:11

linux
https://github.com/timandy/routine/actions/runs/8965563348/job/24619398442#step:6:11

[aparnajyothi-y]

Hello @timandy, zthank you for creating this issue and we will look into it :)

[matthewhughes934]

I suspect this might be something to do with those versions of Go being built differently/in such a way that they don't support cross compilation. Possibly related to #181

EDIT: digging a bit more I see

$ tar -tzf go-1.20.14-darwin-arm64.tar.gz | grep 'src/runtime/.*syso'
./src/runtime/race/internal/amd64v1/race_windows.syso
./src/runtime/race/internal/amd64v1/race_darwin.syso
./src/runtime/race/internal/amd64v1/race_linux.syso
./src/runtime/race/internal/amd64v1/race_freebsd.syso
./src/runtime/race/internal/amd64v1/race_netbsd.syso
./src/runtime/race/internal/amd64v1/race_openbsd.syso
./src/runtime/race/internal/amd64v3/race_linux.syso
./src/runtime/race/race_darwin_arm64.syso
./src/runtime/race/syso_test.go
$ tar -tzf go1.18.10.darwin-arm64.tar.gz | grep 'src/runtime/.*syso'
go/src/runtime/race/race_darwin_arm64.syso
go/src/runtime/race/syso_test.go

files take from:

• https://github.com/actions/go-versions/blob/74d3ad35e25603a981b7fed05ea4103d03cb7bbb/versions-manifest.json#L504
• https://github.com/actions/go-versions/blob/74d3ad35e25603a981b7fed05ea4103d03cb7bbb/versions-manifest.json#L921

Indeed I see the same output in the upstream download from https://go.dev/dl/#go1.20.14 🤔 I wonder if those are meant to be there (via tar -tzf go1.20.14.darwin-arm64.tar.gz | grep 'src/runtime/.*syso') ... indeed it looks like the build process has involved quite a bit over time and I guess those are expected now