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• A copy of Android/Google's version of GCC 4.8's source.
• A copy of Android/Google's version of Binutils 2.24's source.
• Recent Android NDK.
• Recent Android SDK.
• Native library template.
• Some low-level understanding of programming in target language.
• A terminal (linux/mac/unix) or terminal emulator (cygwin/mingw on windows)
• git and gcc installed on your machine.
• Fortran Mod source template (download:here)

 mkdir mytoolkit
cd mytoolkit
git clone https://android.googlesource.com/toolchain/gcc
git clone https://android.googlesource.com/toolchain/binutils
cd gcc/gcc-4.8
./contrib/download_prerequisites
cd ../..
mkdir binutils-build
cd binutils-build
../binutils/binutils-2.24/configure --prefix=/tmp/ndk-User/build/toolchain/prefix --target=arm-linux-androideabi
make
make install
cd ..
mkdir gcc-build
cd gcc-build
../gcc/gcc-4.8/configure --prefix=/tmp/ndk-User/build/toolchain/prefix --target=arm-linux-androideabi --enable-languages=c,c++,fortran --disable-ppl-version-check --disable-cloog-version-check --disable-isl-version-check --enable-cloog-backend=isl --with-host-libstdcxx='-static-libgcc -lstdc++ -lm' --disable-libssp --enable-threads --disable-nls --disable-libmudflap --disable-libgomp --disable-libstdc__-v3 --disable-sjlj-exceptions --disable-shared --disable-tls --disable-libitm --with-float=soft --with-fpu=vfp --with-arch=armv5te --enable-target-optspace --enable-initfini-array --disable-nls --prefix=/tmp/ndk-User/build/toolchain/prefix --with-sysroot=SYSROOT --with-binutils-version=2.24 --with-mpfr-version=3.1.1 --with-mpc-version=1.0.1 --with-gmp-version=5.0.5 --with-gcc-version=4.8 --with-gdb-version=7.6 --with-python=/Users/User/mydroid/ndk/prebuilt/darwin-x86_64/bin/python-config.sh --with-gxx-include-dir=/tmp/ndk-User/build/toolchain/prefix/include/c++/4.8 --with-bugurl=http://source.android.com/source/report-bugs.html --disable-bootstrap --disable-libquadmath --enable-plugins --enable-libgomp --disable-libsanitizer --enable-gold --enable-graphite=yes --with-cloog-version=0.18.0 --with-isl-version=0.11.1 --enable-eh-frame-hdr-for-static --with-arch=armv5te --program-transform-name='s&^&arm-linux-androideabi-&' --enable-gold=default CC=gcc CXX=g++
make
make install

import sys
import mcpi.minecraft as minecraft
import mcpi.block as block

mc = minecraft.Minecraft.create()
mc.setBlocks(-128,0,-128,128,64,128,0)
if(len(sys.argv) > 1):
bid = int(sys.argv[1])
else:
bid = block.SANDSTONE.id

if bid < 0 or bid > 108:
bid = block.SANDSTONE.id

mc.setBlocks(-128,0,-128,128,-64,128,bid)

java -jar patchtool.jar -cl patch1.mod patch2.mod patch3.mod

FF 50 54 50 BF 00 09 B1 EC 09 20 00 BF

FF 50 54 50

E9

movs r0, #9
nop

#!/bin/sh

## ========================================================================

## Script:
##
## mcpetmb (Minecraft PE Transmute A)
##
##
## Description:
##
## Change all blocks of one type into another type.
##
##
## Instructions:
##
## Copy chunks.dat from your mobile device to your computer.
##
## Open a terminal window on your computer and navigate to
## the directory containing the copy of chunks.dat.
##
## Run the script to produce a modified chunks.dat file
## named chunks.dat.[something].
##
## Rename the output file to chunks.dat and transfer it to
## your mobile device to replace the original chunks.dat.
##
##
## Examples:
##
## Command         Output filename         Effect
## mcpetma         chunks.dat.1353325156 31 --> 00 (obsidian --> air)
## mcpetma 2e     chunks.dat.1353325156 31 --> 2e (obsidian --> tnt)
## mcpetma 49 0e chunks.dat.1353325156 49 --> 0e (redstone ore --> gold ore)
##
##
## Tested with OS X v10.7.4 and Minecraft Pocket Edition v0.5.0 alpha.

## ========================================================================

case "${#@}" in
0) oldblock="31"
     newblock="00"
     ;;
1) oldblock="31"
     newblock="${1}"
     ;;
2) oldblock="${1}"
     newblock="${2}"
     ;;
esac

unixtime="$( date +"%s" )"

infile="chunks.dat"

outfile="${infile}.${unixtime}"

## ------------------------------------------------------------------------

echo "Converting block type ${oldblock} to ${newblock}."

echo "Saving output: ${outfile}"

xxd -p -c 1 "${infile}" | \
awk \
-v oldblock="${oldblock}" \
-v newblock="${newblock}" \
'{
if ( NR > 4096 && $1==oldblock ) $1=newblock ;
print ;
}' | \
xxd -p -r \
> "${outfile}"

echo "Finished."

## ------------------------------------------------------------------------

exit 0

## ========================================================================