dongmou9260 2014-07-03 14:54
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在Mac OS X上使用go 1.3启用cgo的问题交叉编译

I tried to cross compile cgo code to linux/arm on my darwin/amd64 MBP with Go 1.3, but ended with no luck :(

My environment:

go version go1.3 darwin/amd64

My goal:

Cross compiling cgo code targeting linux/arm.

Step 1:

Building gcc/g++ cross compiler with ct-ng. It was a long way to build arm-unknown-linux-gnueabi-g++ and arm-unknown-linux-gnueabi-gcc, but I finally made it. I tested with simple C/C++ programs and the outputs worked fine on my linux/arm R-Pi box.

Step 2:

cd /path/to/go/src

sudo CGO_ENABLED=1 CC_FOR_TARGET=/path/to/arm-unknown-linux-gnueabi-gcc CXX_FOR_TARGET=/path/to/arm-unknown-linux-gnueabi-g++ GOOS=linux GOARCH=arm ./make.bash

Everything built OK.

Step 3:

Compiling the following simple cgo code:

package main

/*
#include <stdio.h>
#include <stdlib.h>
*/
import "C"

import (
"unsafe"
)

func main() {
    str := C.CString("abc
")
    C.printf(str)
    C.free(unsafe.Pointer(str))
}

For my host machine:

go install package/of/test

Failed with

arm-unknown-linux-gnueabi-gcc: error: unrecognized command line option '-m64'

For linux/arm:

GOOS=linux GOARCH=arm go install package/of/test

Failed with

runtime.main: call to external function main.main runtime.main:

undefined: main.main

Any idea? Thanks.

  • 写回答

2条回答 默认 最新

  • dongliang1996 2014-11-09 20:33
    关注

    Had same problem for cross compiling Android on Mac. Hope it help you.

    On your step 2:

    sudo CGO_ENABLED=1 CC_FOR_TARGET=/path/to/arm-unknown-linux-gnueabi-gcc CXX_FOR_TARGET=/path/to/arm-unknown-linux-gnueabi-g++ GOOS=linux GOARCH=arm ./make.bash

    add target for RANLIB, something like this (I do not know certain)

    sudo CGO_ENABLED=1 CC_FOR_TARGET=/path/to/arm-unknown-linux-gnueabi-gcc CXX_FOR_TARGET=/path/to/arm-unknown-linux-gnueabi-g++ RANLIB_FOR_TARGET=/path/to/arm-unknown-linux-gnueabi-ranlib GOOS=linux GOARCH=arm ./make.bash

    评论

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