building node-webkit on armv7 hardfp

sudo apt-get install libatk1.0-0 libc6 libasound2 libcairo2 libcups2 libexpat1 libfontconfig1 libfreetype6 libglib2.0-0 libgnome-keyring0 libgtk2.0-0 libpam0g libpango1.0-0 libpci3 libpcre3 libpixman-1-0 libpng12-0 libspeechd2 libstdc++6 libsqlite3-0 libx11-6 libxau6 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxdmcp6 libxext6 libxfixes3 libxi6 libxinerama1 libxrandr2 libxrender1 libxtst6 zlib1g apache2.2-bin bison curl elfutils fakeroot flex g++ gperf libapache2-mod-php5 libasound2-dev libbz2-dev libcairo2-dev libcups2-dev libcurl4-gnutls-dev libelf-dev libgconf2-dev libgl1-mesa-dev libglib2.0-dev libglu1-mesa-dev libgnome-keyring-dev libgtk2.0-dev libkrb5-dev libnspr4-dev libnss3-dev libpam0g-dev libpci-dev libpulse-dev libsctp-dev libspeechd-dev libsqlite3-dev libssl-dev libudev-dev libwww-perl libxslt1-dev libxss-dev libxt-dev libxtst-dev mesa-common-dev metacity patch perl php5-cgi pkg-config python python-cherrypy3 python-dev python-psutil rpm ruby subversion ttf-dejavu-core ttf-indic-fonts ttf-kochi-gothic ttf-kochi-mincho wdiff git-core yasm

cd ~
git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
mkdir -p .gyp
nano .gyp/include.gypi
paste the following
{
    'variables': {
        'linux_link_libpci': 1,
        'linux_link_libspeechd': 1,
        'linux_link_pulseaudio': 1,
        'proprietary_codecs': 1,
        'use_system_bzip2': 1,
        'use_system_flac': 1,
        'use_system_ffmpeg': 0,
        'use_system_harfbuzz': 1,
        'use_system_libevent': 1,
        'use_system_libjpeg': 1,
        'use_system_libpng': 1,
        'use_system_libxml': 0,
        'use_system_opus': 1,
        'use_system_snappy': 1,
        'use_system_ssl': 0,
        'use_system_xdg_utils': 1,
        'use_system_yasm': 1,
        'use_system_zlib': 0,
        'disable_sse2': 1,
        'werror': '',
        'sysroot': '',
        'disable_nacl': 1,
        'linux_use_gold_binary': 0,
        'linux_use_gold_flags': 0,
        'arm_neon': 0,
        'target_arch': 'arm',
        'arm_neon_optional': 0,
        'v8_use_arm_eabi_hardfloat': 'true',
        'arm_fpu': 'vfpv3-d16',
        'arm_float_abi': 'hard',
        'armv7': 1,
        'linux_use_tcmalloc': 0
    }
}

-Save
 
nano arm.env
paste the following
export CXX=g++
export CC=gcc
export AR=ar
export AS=as
export RANLIB=ranlib
export CFLAGS="-I/usr/include/gtk-2.0 -I/usr/include/glib-2.0 -DUSE_EABI_HARDFLOAT"
export CCFLAGS=$CFLAGS
export CXXFLAGS="-I/usr/include/gtk-2.0 -I/usr/include/glib-2.0/ -I/usr/lib/glib-2.0/include/ -I/usr/include/pango-1.0 -I/usr/include/cairo/ -I/usr/include/librsvg-2 -DUSE_EABI_HARDFLOAT"
export GYP_DEFINES="disable_sse2=1 werror= sysroot= linux_link_pulseaudio=1 proprietary_codecs=1 linux_link_libpci=1 linux_link_libspeechd=1 use_system_bzip2=1 use_system_flac=1 use_system_ffmpeg=0 use_system_harfbuzz=1 use_system_libevent=1 use_system_libjpeg=1 use_system_libpng=1 use_system_libxml=0 use_system_opus=1 use_system_snappy=1 use_system_ssl=0 use_system_xdg_utils=1 use_system_yasm=1 disable_nacl=1 linux_use_gold_binary=0 linux_use_gold_flags=0 arm_neon=0 target_arch=arm arm_neon_optional=0 v8_use_arm_eabi_hardfloat=true arm_fpu=vfpv3-d16 arm_float_abi=hard armv7=1 linux_use_tcmalloc=0"
export GYP_GENERATORS="ninja"
 
-Save 

git clone https://github.com/martine/ninja.git -b v1.4.0
./ninja/bootstrap.py

sudo nano /etc/bash.bashrc
paste the following, replace USER with your user:

source /home/USER/arm.env
export PATH=/home/USER/ninja:"$PATH":/home/USER/depot_tools

- Save

source  ~/arm.env
export PATH=~/ninja:"$PATH":~/depot_tools

mkdir -p node-webkit

node-webkit will take about 14gb of diskspace, so an external drive is required.
Ignore the following steps, if you will not run out of space

-   plug in the drive
-   sudo mkfs.ext4 /dev/sdX
-   sudo mount /dev/sdX node-webkit
-   sudo chown USER:USER -R node-webkit

cd node-webkit
nano node-webkit/.gclient

paste the following:
solutions = [
   { "name"        : "src",
     "url"         : "https://github.com/rogerwang/chromium.src.git@origin/node",
     "deps_file"   : ".DEPS.git",
     "managed"     : True,
     "custom_deps" : {
       "src/third_party/WebKit/LayoutTests": None,
       "src/chrome_frame/tools/test/reference_build/chrome": None,
       "src/chrome_frame/tools/test/reference_build/chrome_win": None,
       "src/chrome/tools/test/reference_build/chrome": None,
       "src/chrome/tools/test/reference_build/chrome_linux": None,
       "src/chrome/tools/test/reference_build/chrome_mac": None,
       "src/chrome/tools/test/reference_build/chrome_win": None,
     },
     "safesync_url": "",
   },
]

- Save

create a 3gb swap file:
sudo fallocate -l 3072M /swap
sudo chmod 600 /swap
sudo mkswap /swap
sudo swapon /swap
sudo nano /etc/fstab

add at the end:
/swap none swap defaults 0 0

- Save

gclient sync --nohooks

this will take a while... downloading required files and source (~14GB)

nano src/third_party/webrtc/system_wrappers/source/cpu_features.cc

add after:
#if defined(WEBRTC_ARCH_X86_FAMILY) && defined(_MSC_VER)
#include <intrin.h>
#endif

#include "webrtc/typedefs.h"

the following:

#include <elf.h>

#ifdef __arm__
#include <fcntl.h>
#include <unistd.h>
#include <linux/auxvec.h>
#include <asm/hwcap.h>
#endif

#ifdef __arm__
uint64_t WebRtc_GetCPUFeaturesARM() {
        static bool detected = false;
        static uint64_t have_neon = 0;

        int fd;
        Elf32_auxv_t auxv;
        unsigned int hwcaps;

        if (!detected) {
                int fd;
                Elf32_auxv_t auxv;
                unsigned int hwcaps;

                fd = open("/proc/self/auxv", O_RDONLY);
                if (fd >= 0) {
                        while (read(fd, &auxv, sizeof(Elf32_auxv_t)) == sizeof(Elf32_auxv_t)) {
                                if (auxv.a_type == AT_HWCAP) {
                                        have_neon = (auxv.a_un.a_val & HWCAP_NEON) ? kCPUFeatureNEON : 0;
                                        break;
                                }
                        }
                        close (fd);
                } else {
                        have_neon = 0;
                }
                detected = true;
        }

        return 0 | have_neon; // others here as we need them
}
#endif

- Save

nano src/skia/skia_library_opts.gyp
 
- change from

        [ 'target_arch == "arm" and arm_version >= 6', {
          'sources': [
            '../third_party/skia/src/opts/SkBlitRow_opts_arm.cpp',
            '../third_party/skia/src/opts/SkBlitRow_opts_arm.h',
            '../third_party/skia/src/opts/opts_check_arm.cpp',
          ],
        }],

- to

        [ 'target_arch == "arm" and arm_version >= 6', {
          'sources': [
            '../third_party/skia/src/opts/SkBlitRow_opts_arm.cpp',
            '../third_party/skia/src/opts/SkBlitRow_opts_arm.h',
            '../third_party/skia/src/opts/opts_check_arm.cpp',
            '../third_party/skia/src/opts/memset.arm.S',
          ],
        }],

- Save

that's all, now configure gyp and compile with ninja

./build/gyp_chromium content/content.gyp
ninja -C out/Release nw -j4

Compiling will take about 3 to 4 hours