Hi,
I think I am skipping something obvious - but I really can't understand
what. I looked both in Github and in golang-nuts for information.
I want to make a CLI app in Go to run in Android's Termux. I have Android
NDK's installed and configured.
When I run:
```
CC="${GOPATH}/android-ndk/bin/arm-linux-androideabi-gcc" CGO_ENABLED=0
GOOS=linux GOARCH=arm GOARM=7 go build
```
It compiles fine, but DNS does not work.
When I run:
```
CC="${GOPATH}/android-ndk/bin/arm-linux-androideabi-gcc" GOOS=linux
GOARCH=arm GOARM=7 go build
```
It compiles fine, but DNS does not work too.
It fails when I run:
```
CC="${GOPATH}/android-ndk/bin/arm-linux-androideabi-gcc" GOOS=android
GOARCH=arm GOARM=7 go build
# github.com/ucirello/android-test
warning: unable to find runtime/cgo.a
```
Even worse, when I run:
```
CC="${GOPATH}/android-ndk/bin/arm-linux-androideabi-gcc" GOOS=android go
build
...
arm-linux-androideabi-gcc: error: unrecognized command line option '-m64'
```
Finally, when I check Termux's own go package, I see:
```
$ go version
go version go1.9 android/arm64
```
The application I am running is pretty simple: it only makes a simple HTTP
Get call.
```
package main
import (
"fmt"
"io/ioutil"
"log"
"net/http"
)
func main() {
resp, err := http.Get("http://freegeoip.net/?q=67.161.33.142";)
if err != nil {
log.Fatal(err)
}
b, _ := ioutil.ReadAll(resp.Body)
fmt.Println(string(b))
}
```
The error I get is that it can't talk to the DNS server at [:::]:53 - which
makes sense, because there is not a DNS server running locally.
It seems that GOOS=android will configure itself internally to use CGO,
whereas GOOS=linux might end up using `/etc/resolv.conf` which is not
present in the Termux's sandbox. So the question really is how do I get a
GOOS=android build? The CC variable is there, and it seems correct.
Any suggestions?
Thanks.
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