Thanks, this works perfectly!
On Mon, Dec 5, 2016 at 3:33 AM, Elias Naur <elias.n...@gmail.com> wrote:
>
> On Monday, December 5, 2016 at 7:44:23 AM UTC+1, andrey mirtchovski wrote:
>>
>> I'm having issues with the latest gomobile + reverse java bindings. I
>> have a piece of code that linked with a C library via CGO. Previously
>> (around 6 months ago) everything appeared file: cross compile library
>> with NDK toolchain (gcc), link against go code with cgo, run "gomobile
>> bind -target=android" and everything worked.
>>
>> now it appears gomobile has switched to targeting arm64 with clang. I
>> tried compiling my code against 32-bit gcc, 32-bit clang, and 64-bit
>> clang. even though i can create a successful 32-bit arm binary with
>> the standard Go tools, I am unable to create one with gomobile. here's
>> an example of the 32-bit library I'm using (i've also compiled it
>> static):
>>
>> /opt/arm-linux-androideabi/sysroot/usr/lib/mylibrary.so: ELF 32-bit
>> LSB shared object, ARM, version 1 (SYSV), dynamically linked (uses
>> shared libs), not stripped
>>
>> gradle build however invokes gomobile bind thusly (major parts of the
>> classpaths stripped):
>>
>>
>> --------8<----------------
>> /.../gomobile bind -i -classpath
>>
>> /.../android/android/build/intermediates/exploded-aar/com.android.support/appcompat-v7/24.2.1/jars/classes.jar:[...]:/.../android/android/build/intermediates/classes/debug
>> -o
>> /var/folders/sp/06p28g2d0vs7gd2vhf26wl9m0000gn/T/gobind-2223404674934856774.aar
>> -target android -bootclasspath
>> /.../sdk/platforms/android-24/android.jar -x my/project
>>
>> gomobile then issues this command and receives the following error:
>>
>>
>> /Users/aam/pkg/gomobile/android-ndk-r12b/arm64/bin/aarch64-linux-android-clang
>> -I . -fPIC -pthread -fno-caret-diagnostics -Qunused-arguments
>> -fmessage-length=0 -fdebug-prefix-map=$WORK=/tmp/go-build
>> -gno-record-gcc-switches -o $WORK/my/project/_obj/_cgo_.o ...-target
>> aarch64-none-linux-android --sysroot
>> /.../pkg/gomobile/android-ndk-r12b/arm64/sysroot
>> /opt/arm-linux-androideabi/sysroot/usr/lib/mylibrary.a -lm -lz -pie
>>
>> # my/project
>>
>> /opt/arm-linux-androideabi/sysroot/usr/lib/mylibrary.a: error adding
>> symbols: File in wrong format
>>
>> clang: error: linker command failed with exit code 1 (use -v to see
>> invocation)
>> --------8<----------------
>>
>> again, this works when using GOOS=arm GOARCH=android CGO_ENABLED=1 go
>> build... also, the reverse example works fine with this setup, but
>> that doesn't attempt any cgo tomfoolery.
>>
>> TL;DR: i'm unable to figure out a way to force 32-bit gomobile
>> compilation, especially while staring from outside the "gradle build"
>> wall.
>
>
>
> The gradle plugin supports the GOARCH settings which contains a list of the
> architectures you want to include. Use it in your gobind {...} section of
> your build.gradle, along with your "pkg" setting:
>
> apply plugin: "org.golang.mobile.bind"
>
> gobind {
> pkg = "...golang.org/x/mobile/example/bind/hello"
>
> GOARCH = "arm"
> }
>
>
> - elias
>
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