#!/bin/bash

# Setup

PREFIX=/usr/local/arm
TARGET=armv4l-unknown-linux-gnu
SYSROOT=${PREFIX}/sysroot
export ARCH=arm
export SUBARCH=armv4l
export CROSS_COMPILE=${TARGET}-
export PATH=$PATH:${PREFIX}/bin
mkdir -p ${PREFIX}/src

# Get the sources

cd ${PREFIX}/src
for URL in \
http://ftp.gnu.org/gnu/binutils/binutils-2.16.tar.gz \
http://ftp.gnu.org/gnu/gcc/gcc-3.4.4/gcc-3.4.4.tar.bz2 \
"http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/flow.c.diff?cvsroot=gcc&only_with_tag=csl-arm-branch&r1=1.563.4.2&r2=1.563.4.3" \
http://frank.harvard.edu/~coldwell/toolchain/t-linux.diff \
http://ftp.gnu.org/gnu/glibc/glibc-2.3.5.tar.gz \
http://ftp.gnu.org/gnu/glibc/glibc-linuxthreads-2.3.5.tar.gz \
http://frank.harvard.edu/~coldwell/toolchain/ioperm.c.diff \
http://littlechips.com/downloads/customer/CD_Images/LN2410SBC/Linux/Kernel/linux-2.6.13.2-lc6.tar.gz
#http://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.10.tar.gz \
#http://maxim.org.za/AT91RM9200/2.6/2.6.10-at91.patch.gz \
#http://maxim.org.za/AT91RM9200/2.6/26_at91_serial.c.gz
do
    FILE=${URL##*/}
    FILE=${FILE%%\?*}
    [ -f ${FILE} ] || wget -O ${FILE} ${URL} 
done

# GNU binutils

cd ${PREFIX}/src
tar xvfz binutils-2.16.tar.gz
mkdir -p BUILD/binutils-2.16
cd BUILD/binutils-2.16
 ../../binutils-2.16/configure --prefix=${PREFIX} --target=${TARGET} --with-sysroot=${SYSROOT} 2>&1 | tee configure.out
make 2>&1 | tee make.out
make install 2>&1 | tee -a make.out

# Linux Kernel Headers

cd ${PREFIX}/src
tar xvfz linux-2.6.13.2-lc6.tar.gz
ln -s linux-2.6.13.2-lc6 linux
#zcat 2.6.10-at91.patch.gz | patch -d linux -p1
#zcat 26_at91_serial.c.gz >linux/drivers/serial/at91_serial.c
cd linux
#make at91rm9200dk_defconfig
make include/linux/version.h
mkdir -p ${SYSROOT}/usr/include
cp -a ${PREFIX}/src/linux/include/linux ${SYSROOT}/usr/include/linux
cp -a ${PREFIX}/src/linux/include/asm-arm ${SYSROOT}/usr/include/asm
cp -a ${PREFIX}/src/linux/include/asm-generic ${SYSROOT}/usr/include/asm-generic

# Glibc headers

cd ${PREFIX}/src
tar xvfz glibc-2.3.5.tar.gz
patch -d glibc-2.3.5 -p1 <ioperm.c.diff
cd glibc-2.3.5
tar xvfz ../glibc-linuxthreads-2.3.5.tar.gz
cd ..
mkdir BUILD/glibc-2.3.5-headers
cd BUILD/glibc-2.3.5-headers
../../glibc-2.3.5/configure --prefix=/usr --host=${TARGET} --enable-add-ons=linuxthreads --with-headers=${SYSROOT}/usr/include 2>&1 | tee configure.out
make cross-compiling=yes install_root=${SYSROOT} install-headers 2>&1 | tee make.out
touch ${SYSROOT}/usr/include/gnu/stubs.h
touch ${SYSROOT}/usr/include/bits/stdio_lim.h

# Step 4: stage 1 gcc

cd ${PREFIX}/src
bunzip2 -c gcc-3.4.4.tar.bz2 | tar xvf -
patch -d gcc-3.4.4 -p1 < flow.c.diff
patch -d gcc-3.4.4 -p1 < t-linux.diff
mkdir -p BUILD/gcc-3.4.4-stage1
cd BUILD/gcc-3.4.4-stage1
../../gcc-3.4.4/configure --prefix=${PREFIX} --target=${TARGET} --enable-languages=c --with-sysroot=${SYSROOT} 2>&1 | tee configure.out
make 2>&1 | tee make.out
make install 2>&1 | tee -a make.out

# Step 5: glibc

cd ${PREFIX}/src
mkdir BUILD/glibc-2.3.5
cd BUILD/glibc-2.3.5
BUILD_CC=gcc CC=${CROSS_COMPILE}gcc AR=${CROSS_COMPILE}ar RANLIB=${CROSS_COMPILE}ranlib AS=${CROSS_COMPILE}as LD=${CROSS_COMPILE}ld ../../glibc-2.3.5/configure --prefix=/usr --build=i386-debian-linux --host=${TARGET} --target=${TARGET} --without-__thread --enable-add-ons=linuxthreads --with-headers=${SYSROOT}/usr/include 2>&1 | tee configure.out
make 2>&1 | tee make.out
make install_root=${SYSROOT} install

# Step 6: stage 2 gcc

cd ${PREFIX}/src
mkdir BUILD/gcc-3.4.4
cd BUILD/gcc-3.4.4
../../gcc-3.4.4/configure --prefix=${PREFIX} --target=${TARGET} --enable-languages=c --with-sysroot=${SYSROOT} 2>&1 | tee configure.out
make 2>&1 | tee make.out
make install 2>&1 | tee -a make.out
cd ../..

# Step 7: Linux kernel

cd ${PREFIX}/src/linux
make zImage
make modules
make INSTALL_MOD_PATH=${SYSROOT} modules_install