Please answer these questions before submitting your issue. Thanks!

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

go version go1.7.3 darwin/amd64

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

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/tenntenn/Documents/gopath"
GORACE=""
GOROOT="/usr/local/go1.7"
GOTOOLDIR="/usr/local/go1.7/pkg/tool/darwin_amd64"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/mq/m9_twy8j1vl9ppr6j5xqtfq80000gn/T/go-build520115728=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"

What did you do?

If possible, provide a recipe for reproducing the error.
A complete runnable program is good.
A link on play.golang.org is best.

gradle plugin uses same command-line flags for gomobile and gobind as GOMOBILEFLAGS.
But thier flags are not same.
if -x or -v would be given to GOMOBILEFLAGS, gradle reports errors:

:gobindDebug
flag provided but not defined: -x
Usage of /Users/tenntenn/Documents/gopath/bin/gobind:
  -bootclasspath string
        Java bootstrap classpath.
  -classpath string
        Java classpath.
  -javapkg string
        custom Java package path prefix used instead of the default 'go'. Valid only with -lang=java.
  -lang string
        target language for bindings, either java, go, or objc (experimental). (default "java")
  -outdir string
        result will be written to the directory instead of stdout.
  -prefix string
        custom Objective-C name prefix used instead of the default 'Go'. Valid only with -lang=objc.
:gobindDebug FAILED

What did you expect to see?

gomobile and gobind flags should be given different variables such as GOMOBILEFLAGS and GOBINDFLAGS.

What did you see instead?

gradle reports errors.