please fill out the entire template.

Looks like he is hitting this panic https://github.com/golang/mobile/blob/master/cmd/gomobile/env.go#L298
And looking up NDK, there is no darwin arm64 build https://developer.android.com/ndk/downloads

cc @hajimehoshi

What version of Go are you using (go version)?

$ go version
go version go1.16.3 darwin/arm64

Does this issue reproduce with the latest release?

yes

What operating system and processor architecture are you using (go env)?

$ go env
GO111MODULE="auto"

GOARCH="arm64"

GOBIN=""

GOCACHE="/Users/xxx/Library/Caches/go-build"

GOENV="/Users/xxx/Library/Application Support/go/env"

GOEXE=""

GOFLAGS=""

GOHOSTARCH="arm64"

GOHOSTOS="darwin"

GOINSECURE=""

GOMODCACHE="/Users/xxx/go/pkg/mod"

GONOPROXY=""

GONOSUMDB=""

GOOS="darwin"

GOPATH="/Users/xxx/go"

GOPRIVATE=""

GOPROXY="https://proxy.golang.org,direct"

GOROOT="/opt/homebrew/Cellar/go/1.16.3/libexec"

GOSUMDB="sum.golang.org"

GOTMPDIR=""

GOTOOLDIR="/opt/homebrew/Cellar/go/1.16.3/libexec/pkg/tool/darwin_arm64"

GOVCS=""

GOVERSION="go1.16.3"

GCCGO="gccgo"

AR="ar"

CC="clang"

CXX="clang++"

CGO_ENABLED="1"

GOMOD=""

CGO_CFLAGS="-g -O2"

CGO_CPPFLAGS=""

CGO_CXXFLAGS="-g -O2"

CGO_FFLAGS="-g -O2"

CGO_LDFLAGS="-g -O2"

PKG_CONFIG="pkg-config"

GOGCCFLAGS="-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/qh/w0rmms1543l0501ptgw_zhxh0000gn/T/go-build2439043797=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

gomobile init

What did you expect to see?

What did you see instead?

goroutine 1 [running]:
main.archNDK(...)
/Users/xxx/go/src/golang.org/x/mobile/cmd/gomobile/env.go:298
main.(*ndkToolchain).Path(0x14000197b00, 0x140000b8000, 0x29, 0x1011be402, 0x5, 0x0, 0x14000197938)
/Users/xxx/go/src/golang.org/x/mobile/cmd/gomobile/env.go:327 +0xc0
main.envInit(0x14000016047, 0x31)
/Users/xxx/go/src/golang.org/x/mobile/cmd/gomobile/env.go:108 +0xa0c
main.buildEnvInit(0x1014a8980, 0x1400011dc20, 0x0)
/Users/xxx/go/src/golang.org/x/mobile/cmd/gomobile/env.go:79 +0x1a8
main.runBuildImpl(0x10149f860, 0x0, 0x0, 0x0)
/Users/xxx/go/src/golang.org/x/mobile/cmd/gomobile/build.go:76 +0x38
main.runBuild(0x10149f860, 0x14000140020, 0x2)
/Users/xxx/go/src/golang.org/x/mobile/cmd/gomobile/build.go:69 +0x28
main.main()
/Users/xxx/go/src/golang.org/x/mobile/cmd/gomobile/main.go:73 +0x2c0

@hyangah I don't have M1 Mac then I cannot test this, but I guess gomobile should support M1 environments and this should be easy. What do you think?

And looking up NDK, there is no darwin arm64 build https://developer.android.com/ndk/downloads

Can't the toolchains be downloaded via Android Studio?

Can't the toolchains be downloaded via Android Studio?

Nope, as far as I can tell, there is no M1 build of NDK at all yet.
But M1 should be able to run x86_64 code but I'm not sure if that works with the NDK

Ah that makes sense. Then for M1 mac, we should invoke x64 toolchains with Rosetta.

ndk support should be android/ndk#1299 , comments there say rosetta works

Can't the toolchains be downloaded via Android Studio?

Nope, as far as I can tell, there is no M1 build of NDK at all yet.
But M1 should be able to run x86_64 code but I'm not sure if that works with the NDK

” gomobile build -target=ios ” ，the same mistake

Ah that makes sense. Then for M1 mac, we should invoke x64 toolchains with Rosetta.

Unfortunately this may help for Android by now, but not for iOS as with Xcode 13:

❯ clang --version
Apple clang version 13.0.0 (clang-1300.0.18.6)
Target: arm64-apple-darwin20.4.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

Change https://golang.org/cl/346153 mentions this issue: cmd/gomobile: handle NDK path for darwin/arm64