x/mobile: init fails when running make_standalone_toolchain.py #27265

pieterclaerhout · 2018-08-27T06:54:43Z

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

go version go1.11 darwin/amd64

Does this issue reproduce with the latest release?

Yes.

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

GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/pclaerhout/Library/Caches/go-build"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/pclaerhout/gopath"
GORACE=""
GOROOT="/usr/local/Cellar/go/1.10.3/libexec"
GOTMPDIR=""
GOTOOLDIR="/usr/local/Cellar/go/1.10.3/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/hb/92v_9tgd5g5f2npqwk4ztfrh0000gq/T/go-build451235970=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

I'm trying to install gomobile, but the init step fails.

$ go install golang.org/x/mobile/cmd/gomobile/
$ bin/gomobile clean
$ bin/gomobile init -ndk /Library/Android/sdk/ndk-bundle
bin/gomobile: /Library/Android/sdk/ndk-bundle/prebuilt/darwin-x86_64/bin/python2.7 build/tools/make_standalone_toolchain.py --arch=arm --api=15 --install-dir=/Users/pclaerhout/Documents/shp-projects/TwixlPublisher/git/distribution-platform/pkg/gomobile/ndk-toolchains/arm failed: exit status 1
15 is less than minimum platform for arm (16)

The Android SDK version which I have installed is 18.0.4951716 rc2.

What did you expect to see?

I expected to see no error message at all.

What did you see instead?

From what I can see, the arguments specified to run the Android NDK make_standalone_toolchain.py are incorrect. When making the toolchain for either arm or x86 requires a minimum api level of 16, not 15. This can easily be fixed by updating the following file:

golang.org/x/mobile/cmd/gomobile/env.go

There, the NDK config should be updated from:

var ndk = ndkConfig{
	"arm": {
		arch:       "arm",
		abi:        "armeabi-v7a",
		platform:   "android-15",
		gcc:        "arm-linux-androideabi-4.9",
		toolPrefix: "arm-linux-androideabi",
	},
	"arm64": {
		arch:       "arm64",
		abi:        "arm64-v8a",
		platform:   "android-21",
		gcc:        "aarch64-linux-android-4.9",
		toolPrefix: "aarch64-linux-android",
	},

	"386": {
		arch:       "x86",
		abi:        "x86",
		platform:   "android-15",
		gcc:        "x86-4.9",
		toolPrefix: "i686-linux-android",
	},
	"amd64": {
		arch:       "x86_64",
		abi:        "x86_64",
		platform:   "android-21",
		gcc:        "x86_64-4.9",
		toolPrefix: "x86_64-linux-android",
	},
}

to

var ndk = ndkConfig{
	"arm": {
		arch:       "arm",
		abi:        "armeabi-v7a",
		platform:   "android-16",
		gcc:        "arm-linux-androideabi-4.9",
		toolPrefix: "arm-linux-androideabi",
	},
	"arm64": {
		arch:       "arm64",
		abi:        "arm64-v8a",
		platform:   "android-21",
		gcc:        "aarch64-linux-android-4.9",
		toolPrefix: "aarch64-linux-android",
	},

	"386": {
		arch:       "x86",
		abi:        "x86",
		platform:   "android-16",
		gcc:        "x86-4.9",
		toolPrefix: "i686-linux-android",
	},
	"amd64": {
		arch:       "x86_64",
		abi:        "x86_64",
		platform:   "android-21",
		gcc:        "x86_64-4.9",
		toolPrefix: "x86_64-linux-android",
	},
}

After patching this file manually, rebuilding the gomobile command, I was able to succesfully run bin/gomobile init -ndk /Library/Android/sdk/ndk-bundle.

The text was updated successfully, but these errors were encountered:

willauld · 2018-10-03T00:48:46Z

I believe I am having the same problem. I've updated the env.go file but how do you rebuild gomobile at this point?
I'm working on win10.

pieterclaerhout · 2018-10-03T06:21:32Z

Running the gomobile init -ndk ... command should do the rebuild.

willauld · 2018-10-03T17:34:51Z

Thanks.

Given this I tried the following and pretty much get the same result as before. So, maybe I'm still doing something wrong or my problem is different. Does the following command look correct? I've trimmed the middle of its output.
Thanks,
Will

powershell> gomobile init -ndk C:\Users\auld\AppData\Local\Android\sdk1\ndk-bundle -v

Installing std for android/arm.

runtime/cgo

C:\Users\auld\AppData\Local\Android\sdk1\ndk-bundle\toolchains\arm-linux-androideabi-4.9\prebuilt\windows-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin\ld: error: cannot open crtbegin_dynamic.o: No such file or directory
C:\Users\auld\AppData\Local\Android\sdk1\ndk-bundle\toolchains\arm-linux-androideabi-4.9\prebuilt\windows-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin\ld: error: cannot open crtend_android.o: No such file or directory
...
C:\Users\auld\AppData\Local\Temp\go-build552291650\b081_x010.o:gcc_util.c:function x_cgo_thread_start: error: undefined reference to '__sF'
clang.exe: error: linker command failed with exit code 1 (use -v to see invocation)
C:\home\auld\godev\bin\gomobile.exe: go install -gcflags=-shared -ldflags=-shared -pkgdir=C:\home\auld\godev\pkg\gomobile/pkg_android_arm -v std failed: exit status 2

pieterclaerhout · 2018-10-04T07:25:14Z

From what I can see, your problem seems to be different.

In your case it seems that the actual compilation of the Android native stuff fails:


C:\Users\auld\AppData\Local\Temp\go-build552291650\b081_x010.o:gcc_util.c:function x_cgo_thread_start: error: undefined reference to '__sF'
clang.exe: error: linker command failed with exit code 1 (use -v to see invocation)

willauld · 2018-10-04T16:48:47Z

OK, well thanks for your help, I'll keep digging.

willauld · 2018-10-04T21:08:43Z

OK here is what works for me (I'm on Win10):

Make pieterclaerhout's change to env.go in $GOPATH/src\golang.org\x\mobile\cmd\gomobile\
In $GOPATH/src\golang.org\x\mobile\cmd\gomobile\ issue the command:
go install
to build and install the new version of gomible.exe
gomobile init -ndk C:\Users\auld\AppData\Local\Android\sdk1\ndk-bundle
ndk path will be specific to the person and their android environment
use gomobile as you normally would

eliasnaur · 2018-10-10T09:10:28Z

I believe this is fixed in the latest gomobile version. Can you confirm?

pieterclaerhout · 2018-10-10T17:18:12Z

Yes, it seems to be working fine now.

willauld · 2018-10-10T17:21:07Z

OK, I renamed my GOPATH/src/x to xold

$ go get golang.org/x/mobile/cmd/gomobile
$ gomobile init
$ gomobile version
gomobile version +92f3b9c Wed Oct 10 16:34:05 2018 +0000 (android); androidSDK=C:\Users\auld\AppData\Local\Android\sdk1\platforms\android-27

Then I rebuilt / bind my go lib and built my android app and all works fine

Thanks,
Wil

FiloSottile changed the title ~~gomobile init fails when running make_standalone_toolchain.py~~ x/mobile: init fails when running make_standalone_toolchain.py Aug 30, 2018

gopherbot added this to the Unreleased milestone Aug 30, 2018

gopherbot added the mobile Android, iOS, and x/mobile label Aug 30, 2018

FiloSottile added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Aug 30, 2018

eliasnaur closed this as completed Oct 10, 2018

golang locked and limited conversation to collaborators Oct 10, 2019

gopherbot added the FrozenDueToAge label Oct 10, 2019

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x/mobile: init fails when running make_standalone_toolchain.py #27265

x/mobile: init fails when running make_standalone_toolchain.py #27265

pieterclaerhout commented Aug 27, 2018

willauld commented Oct 3, 2018

pieterclaerhout commented Oct 3, 2018

willauld commented Oct 3, 2018

pieterclaerhout commented Oct 4, 2018

willauld commented Oct 4, 2018

willauld commented Oct 4, 2018

eliasnaur commented Oct 10, 2018 •

edited

pieterclaerhout commented Oct 10, 2018

willauld commented Oct 10, 2018

x/mobile: init fails when running make_standalone_toolchain.py #27265

x/mobile: init fails when running make_standalone_toolchain.py #27265

Comments

pieterclaerhout commented Aug 27, 2018

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

Does this issue reproduce with the latest release?

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

What did you do?

What did you expect to see?

What did you see instead?

willauld commented Oct 3, 2018

pieterclaerhout commented Oct 3, 2018

willauld commented Oct 3, 2018

Installing std for android/arm.

runtime/cgo

pieterclaerhout commented Oct 4, 2018

willauld commented Oct 4, 2018

willauld commented Oct 4, 2018

eliasnaur commented Oct 10, 2018 • edited

pieterclaerhout commented Oct 10, 2018

willauld commented Oct 10, 2018

OK, I renamed my GOPATH/src/x to xold

$ go get golang.org/x/mobile/cmd/gomobile $ gomobile init $ gomobile version gomobile version +92f3b9c Wed Oct 10 16:34:05 2018 +0000 (android); androidSDK=C:\Users\auld\AppData\Local\Android\sdk1\platforms\android-27

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

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

eliasnaur commented Oct 10, 2018 •

edited

$ go get golang.org/x/mobile/cmd/gomobile
$ gomobile init
$ gomobile version
gomobile version +92f3b9c Wed Oct 10 16:34:05 2018 +0000 (android); androidSDK=C:\Users\auld\AppData\Local\Android\sdk1\platforms\android-27