Mobile/Fennec/Android/PatchQueue

Install the modified NDK with libstdc++ support: http://crystax.net/android/ndk.php

Get Michael Wu's Android patch queue and apply it to mozilla-central:

hg clone http://hg.mozilla.org/mozilla-central/
cd mozilla-central/.hg
hg clone http://hg.mozilla.org/users/mwu_mozilla.com/test-repo/ patches
cd ..
hg clone http://hg.mozilla.org/mobile-browser/ mobile
hg qpush -a

Put the following in your mozconfig file. Make sure you set the paths to the NDK/SDK appropriately.

# Uncomment these two lines to use objdir with client.mk
#OBJDIR=objdir-android
#mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/$OBJDIR

# Global options
ac_add_options --disable-debug
ac_add_options --enable-optimize

# Build Fennec
ac_add_options --enable-application=mobile

# Android
ac_add_options --target=arm-android-eabi
ac_add_options --with-endian=little
ac_add_options --with-android-ndk="/PATH/TO/android-ndk-r4-crystax"
ac_add_options --with-android-sdk="/PATH/TO/android-sdk/platforms/android-8"
ac_add_options --with-android-tools="/PATH/TO/android-sdk/tools"

# ssltunnel can't build because the ndk doesn't have string, vector, or algorithm headers
ac_add_options --disable-tests