Do you have qemu-user-static or a similarly named package installed? Then
the magic of binfmt_misc may be invoking it. For me:
$ cat /proc/sys/fs/binfmt_misc/qemu-arm
enabled
interpreter /usr/bin/qemu-arm-static
flags: OC
offset 0
magic 7f454c460101010002002800
mask ff00feff
Cheers,
mwh
On 16 February 2017 at 20:37, Dan Kortschak
wrote:
> Can someone explain to me why this works? I am cross-compiling for
> arm5, but the executable works on amd64.
>
> $ cat hello.go
> package main
>
> import "fmt"
>
> func main() {
> fmt.Println("hello")
> }
> $ GOARCH=arm GOARM=5 go build hello.go
> $ ./hello
> hello
> $ go env
> GOARCH="amd64"
> GOBIN=""
> GOEXE=""
> GOHOSTARCH="amd64"
> GOHOSTOS="linux"
> GOOS="linux"
> GOPATH="/home/daniel"
> GORACE=""
> GOROOT="/home/daniel/go"
> GOTOOLDIR="/home/daniel/go/pkg/tool/linux_amd64"
> CC="gcc"
> GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-
> map=/tmp/go-build014006335=/tmp/go-build -gno-record-gcc-switches"
> CXX="g++"
> CGO_ENABLED="1"
> $ go version
> go version go1.7.4 linux/amd64
>
>
> The executable also works on the arm5 device. I'm not worried, but I
> don't understand how this works.
>
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