Tydus

HOWTO Cross compiling on Android

5W1H

What is NDK

NDK (Native Develop Toolkit) is a toolchain from Android official, originally for users who writes native C/C++ code as JNI library. It's not designed for compiling standalone programs (./a.out) and not compatible with automake/cmake etc.

What is Standalone Toolchain

"Standalone" refers to two meanings:

The program is standalone (has nothing connect to NDK, and don't need helper scripts to run it)
The toolchain is made for building standalone programs and libs, and which can used by automake etc.

(Optional) Why NDK is hard to use

By default, NDK uses android flavor directory structure when it's finding headers and libs, which is different from GNU flavor, so the compiler cannot find them. For Example:

	<?xml version="1.0" encoding="UTF-8"?>
	<AnyConnectProfile xmlns="http://schemas.xmlsoap.org/encoding/">
	<ClientInitialization>
	<UseStartBeforeLogon UserControllable="true">false</UseStartBeforeLogon>
	<AutomaticCertSelection UserControllable="true">true</AutomaticCertSelection>
	<ShowPreConnectMessage>false</ShowPreConnectMessage>
	<CertificateStore>All</CertificateStore>
	<CertificateStoreMac>All</CertificateStoreMac>
	<CertificateStoreOverride>false</CertificateStoreOverride>
	<ProxySettings>Native</ProxySettings>

	Game.Win('Third-party');
	if(FortuneCookie === undefined) var FortuneCookie = {};
	if(typeof CCSE == 'undefined') Game.LoadMod('https://klattmose.github.io/CookieClicker/' + (0 ? 'Beta/' : '') + 'CCSE.js');
	FortuneCookie.name = 'Fortune Cookie';
	FortuneCookie.version = '2.17';
	FortuneCookie.GameVersion = '2.022';

	FortuneCookie.launch = function(){
	FortuneCookie.init = function(){
	FortuneCookie.isLoaded = 1;

	/**********
	* Header *
	**********/

	CM = {};

	CM.Backup = {};

	CM.Cache = {};

	#!/bin/sh

	# ifrename.sh: rename ethx and wlanx to persistent names
	# Dependency: ip ethtool
	# See also: https://github.com/systemd/systemd/blob/master/src/udev/udev-builtin-net_id.c
	# TODO: currently only support pci-e devices

	ip -br l \| cut -d' ' -f1 \| while read i; do

	prefix=$(echo "$i" \| cut -c-2)

	#!/bin/sh

	#=======================================
	# config_vwifi.sh
	# Config virtual wi-fi (bridge to vlans)
	#=======================================

	# show which port you have by `robocfg show'
	PORT_LIST="0t 1t 2t 3t 4t 8t"

	from tensorflow.examples.tutorials.mnist import input_data
	mnist = input_data.read_data_sets('MNIST_data', one_hot=True)

	import tensorflow as tf
	sess = tf.InteractiveSession()

	weight_variable = lambda shape: tf.Variable(tf.truncated_normal(shape, stddev=0.1))
	bias_variable = lambda shape: tf.Variable(tf.constant(0.1, shape=shape))

	conv2d = lambda x, W: tf.nn.conv2d(x, W, strides=[1, 1, 1, 1], padding='SAME')

	import json, sys, numpy as np
	from scipy import misc, signal
	from PIL import Image
	infile, outfile, modelpath = sys.argv[1:]
	model = json.load(open(modelpath))
	im = Image.open(infile).convert("YCbCr")
	im = misc.fromimage(im.resize((2im.size[0], 2im.size[1]), resample=Image.NEAREST)).astype("float32")
	planes = [np.pad(im[:,:,0], len(model), "edge") / 255.0]
	for step in model:
	o_planes = [sum([signal.convolve2d(ip, np.float32(kernel), "valid")

	#!/usr/bin/python2

	import sys
	import json
	import urllib2
	import lxml.html

	def fetch(url):
	ua = "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:33.0) Gecko/20100101 Firefox/33.0.2"
	return urllib2.urlopen(urllib2.Request(

	import System;
	import System.Windows.Forms;
	import Fiddler;

	// INTRODUCTION
	// This is the FiddlerScript Rules file, which creates some of the menu commands and
	// other features of Fiddler. You can edit this file to modify or add new commands.
	//
	// The original version of this file is named SampleRules.js and it is in the
	// \Program Files\Fiddler\ folder. When Fiddler first starts, it creates a copy named