Steeve Morin steeve

How to cross compile Go with CGO programs for a different OS/Arch

It is possible to compile Go programs for a different OS, even though go build says otherwise.

You'll need:

a valid toolchain for the platform/os you're targetting
Go Tip (works on 1.1 and 1.2rc1 but you might as well be on tip)
golang-crosscompile helper script https://github.com/davecheney/golang-crosscompile
the patch provided

	void
	_wrap_add_torrent_params_name_get(void *swig_v)
	{
	libtorrent::add_torrent_params arg1 = (libtorrent::add_torrent_params ) 0 ;
	std::string *result = 0 ;

	struct swigargs {
	libtorrent::add_torrent_params *arg1;
	long : 0;
	_gostring_ result;

	################################################################################
	# This file is part of OpenELEC - http://www.openelec.tv
	# Copyright (C) 2009-2012 Stephan Raue ([email protected])
	# Inspired and partly copied from:
	# http://youresuchageek.blogspot.fr/2012/09/howto-raspberry-pi-openelec-on.html
	#
	# This Program is free software; you can redistribute it and/or modify
	# it under the terms of the GNU General Public License as published by
	# the Free Software Foundation; either version 2, or (at your option)
	# any later version.

	cd /
	touch /var/lock/xbmc.disabled
	killall -9 xbmc.bin
	fuser -m /storage \| xargs kill -9; umount /storage
	parted /dev/mmcblk0
	unit s
	rm 2
	mkpart primary 258048 -1
	quit
	e2fsck -f /dev/mmcblk0p2 && resize2fs /dev/mmcblk0p2 && mount /dev/mmcblk0p2 /storage

	#include <windows.h>
	#include <assert.h>

	#ifdef __cplusplus
	extern "C" {
	#endif
	void (crosscall2)(void (fn)(void , int), void , int);
	void (_cgo_allocate)(void , int);
	void (_cgo_panic)(void , int);
	#ifdef __cplusplus

	fatal error: runtime: stack split during syscall

	runtime stack:
	runtime.throw(0x6a8934)
	/usr/local/go/src/pkg/runtime/panic.c:464 +0x5c
	runtime.newstack()
	/usr/local/go/src/pkg/runtime/stack.c:261 +0x5bc
	runtime.morestack()
	/usr/local/go/src/pkg/runtime/asm_arm.s:212 +0x44

	$ make clean all TARGET_OS=android ARCH=arm CROSS_PREFIX=arm-linux-androideabi CROSS_HOME=/usr/local/gcc-4.8.0-arm-linux-androideabi
	rm -rf build/android_arm build/android_arm/obj/libtorrent_wrap.o build/android_arm/obj/libtorrent_wrap.cxx libtorrent_gc.c libtorrent.go *.so
	mkdir -p build/android_arm
	mkdir -p build/android_arm/obj
	mkdir -p build/android_arm/bin

	swig -go -c++ -soname libtorrent-go.so -intgosize 32 -I/usr/local/gcc-4.8.0-arm-linux-androideabi/include -I/usr/local/gcc-4.8.0-arm-linux-androideabi/arm-linux-androideabi/include -DTORRENT_USE_OPENSSL -DWITH_SHIPPED_GEOIP_H -DBOOST_ASIO_HASH_MAP_BUCKETS=1021 -DBOOST_EXCEPTION_DISABLE -DBOOST_ASIO_ENABLE_CANCELIO -DBOOST_ASIO_DYN_LINK -I/usr/local/gcc-4.8.0-arm-linux-androideabi

	sed -i '' 's/} \swig_a/} __attribute__((__packed__)) \swig_a/g' build/android_arm/obj/libtorrent_wrap.cxx
	sed -i '' 's/} a/} __attribute__((__packed__)) a/g' build/android_arm/obj/libtorrent_wrap.cxx

	~/p/g/s/g/s/t/build git:master ❯❯❯ ls -la
	total 0
	drwxr-xr-x 8 steeve staff 272 2 déc 20:27 .
	drwxr-xr-x 16 steeve staff 544 2 déc 20:01 ..
	drwxr-xr-x 3 steeve staff 102 2 déc 18:07 android_arm
	drwxr-xr-x 5 steeve staff 170 2 déc 18:06 darwin_x64
	drwxr-xr-x 3 steeve staff 102 2 déc 20:24 linux_arm
	drwxr-xr-x 3 steeve staff 102 2 déc 14:14 linux_x64
	drwxr-xr-x 3 steeve staff 102 2 déc 20:28 linux_x86
	drwxr-xr-x 4 steeve staff 136 2 déc 14:04 windows_x86