#!/bin/bash
########################################################################
# build-avr-gnu-toolchain.sh
#
# This script builds the GNU toolchain for the AVR target.
#
# Copyright (C) 2006-2010 Atmel Corporation
#
# This script is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation version 2.1.
#
# This script is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this script; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#
########################################################################
#
# $Id: build-avr8-gnu-toolchain.sh 119628 2012-08-03 10:12:23Z vidhya.praveen $
#
########################################################################

usage="\
Usage: `basename $0` [OPTIONS] <package...>

This script builds the GNU toolchain for the AVR target.

Packages can be given as arguments. The order they are given defines the
build order. Use option '-l' to list default packages.

The script build the tools in the 'build' folder based on the sources in the
'source' folder. The tools are installed in the 'prefix' folder.
Default 'build' folder is a '<current>/build'. Change it with option '-b <folder>'.
Default 'source' folder is '<current>'. Change it with option 's <folder>'.
Default 'prefix' folder is '/usr/local'. Change it by setting enviroment 'AVR_PREFIX',
                                         or use option '-p <prefix>'.

Options:
  -b <folder>           Defines build folder
  -h                    Prints this help message
  -k                    Keep old build folder
  -l                    Lists default packages
  -p <prefix>           Sets the installation prefix
  -P <password>			The password for executing sudo command
  -s <folder>           Defines source folder

  -B <target>           sets build platform for 'configure'
  -H <target>           sets host platform for 'configure'

Enviroment:
  AVR_PREFIX            Installation prefix
  AVR_8_GNU_TOOLCHAIN_VERSION     Gives the version number of the toochain
  BUILD_NUMBER          Adds a build number to the version string if set"

######## General helper functions ###############################
function task_start () {
    printf "%-52s" "$1"
}

function task_success () {
    echo OK
}

function task_error () {
    echo FAILED
    echo $1
    exit 1
}

function wipe_directory () {
    if [ -e "$1" ]; then
        task_start "Wiping $1 ($2)... "
        rm -rf "$1" && task_success || task_error
    fi
}

function do_make () {
    make $MAKEOPTS > make.out 2>&1 || task_error "$1"
}

function do_make_install () {
    if test -z ${SUDO_PASSWORD}
    then
        make install > make.install.out 2>&1 || task_error "$1"
    else
        echo ${SUDO_PASSWORD}| sudo -S -E PATH=${PATH}:${PREFIX}/bin \
        make install > make.install.out 2>&1 || task_error "$1"
    fi
}

function do_pushd () {
    pushd $1 > /dev/null
}

function do_popd () {
    popd $1 > /dev/null
}

function do_mkpushd () {
    mkdir -p $1
    do_pushd $1
}

function start_timer () {
    begin_time=`date +%s`
}

function end_timer () {
    end_time=`date +%s`
}

function report_time() {
    elapsed=$[$end_time - $begin_time]
    hours=$[$elapsed/3600]
    mins=$[($elapsed%3600)/60]
    secs=$[$elapsed%60]
    echo "Finished at `date`"
    echo "Task completed in $hours hours, $mins minutes and $secs seconds."
}

######## Functions for avr gnu toolchain ###############################
function remove_build_folder()
{
    # arg1 = the package subfolder in builddir
    if test -d ${builddir}/$1 -a ${KEEP_BUILD_FOLDER} != "YES" ; then
        rm -rf ${builddir}/$1 || task_error "Could not remove $1 build folder."
    fi
}


#Tries to set platform types
# $1 = package
function set_platform_variables()
{
    build_platform=${srcdir}/${1}/config.guess
    if test -z ${host_platform}; then
        host_platform=${build_platform}
    fi
}


function unpack_upstream_source()
{
    local workdir=$1
    local archive_name=$2
    local archive_tar_flag=""

    case $archive_name in
        *.tar.gz|*.tgz)
            archive_tar_flag='--gzip';;
        *.tar.bz2|*.tbz2)
            archive_tar_flag='--bzip2';;
        *.tar)
            archive_tar_flag="";;
        *)
            task_error "Unknown archive format."
    esac

    if ! tar --directory ${workdir} ${archive_tar_flag} -x -f ${archive_name}; then
        task_error "Corrupt file ${archive_name}"
    fi
}


function apply_patches()
{
    local workdir=$1
    local archivedir=$2

    do_pushd ${workdir}

        # Patch Categories
        #    0x = Distribution specific (distro names and versions)
        #    1x = Host platform specific
        #    2x = Build system specific
        #    3x = New target features
        #    4x = Patches to fix target bugs
        #    5x = New devices

    if test -z "$(ls ${archivedir}/*.patch)"; then
        echo "No patch files, skipping patch"
        do_popd
        return
    fi

    for i in ${archivedir}/*.patch ; do
        echo "Patch: $i" >> patch.log
        patch --verbose --strip=0 --input="$i"  >> patch.log || task_error "Patching failed."
    done
    do_popd
}


############ Define functions used for the different tasks ########
function set_binutils_parameters()
{
    if test -f "${srcdir}/binutils/bfd/ATMEL-VER"; then
        read binutils_version_atmel < ${srcdir}/binutils/bfd/ATMEL-VER
    else
        binutils_version_atmel="atmel-$(date +%Y%m%d%H%M%Z)"
    fi
}

function binutils_prep()
{
    if test -f ${srcdir}/binutils/.prep_done
    then
        set_binutils_parameters
        return
    fi

    task_start "Preparing Binutils... "
    if [ ! -d ${srcdir}/binutils-*-patches ] ; then
        echo "Can't find binutils source."
        exit 1
    fi
    do_pushd ${srcdir}
    rm -rf binutils binutils-[0-9]\.[0-9][0-9]* || task_error "Removing old binutils folders failed"
    upstream_source=$(ls ./binutils-*-patches/binutils-*.*)
    unpack_upstream_source ${srcdir} ${upstream_source}

    # Link the unpacked folder to a generic folder for future work.
    ln -s $(ls -d binutils-[0-9]\.[0-9][0-9]*)  binutils || task_error "Error linking binutils folder"

    # Apply patches to source.
    apply_patches ${srcdir}/binutils $(ls -d ${srcdir}/binutils-*-patches)

    # Prepare for configuration.
    if [ ! -d ${srcdir}/binutils ] ; then
        echo "Can't find binutils source."
        exit 1
    fi

    set_binutils_parameters
    cd binutils

    # Some sed magic to make autotools work on platforms with different autotools version
    # Works for binutils 2.20.1. May work for other versions.
    sed -i 's/AC_PREREQ(2.64)/AC_PREREQ(2.63)/g' ./configure.ac || task_error "sed failed"
    sed -i 's/AC_PREREQ(2.64)/AC_PREREQ(2.63)/g' ./libiberty/configure.ac || task_error "sed failed"
    sed -i 's/  \[m4_fatal(\[Please use exactly Autoconf \]/  \[m4_errprintn(\[Please use exactly Autoconf \]/g' ./config/override.m4 || task_error "sed failed"

    # This one is necessary for 2.21 (but not for 2.21.2
    sed -i 's/\@include gnu-oids.texi//' ./etc/standards.texi

    autoconf || task_error "autoconf failed"
    for d in ld ; do
        do_pushd ${d}
        autoreconf	 || task_error "autoreconf in $d failed."
        do_popd
    done

    do_popd
    task_success
    touch ${srcdir}/binutils/.prep_done
}


function binutils_build()
{
    local binutils_target=${1}
    local binutils_extra_opts=""
    local binutils_doc_opts=""
    local binutils_extra_config=""

    task_start "Building Binutils for ${binutils_target}... "
    remove_build_folder "${binutils_target}-binutils"
    OLD_MAKEOPTS=$MAKEOPTS
    MAKEOPTS=""
    do_mkpushd ${builddir}/${binutils_target}-binutils
    case "${host_platform}" in
    i[3456]86*-linux*)
        binutils_extra_config="LDFLAGS=-all-static"
        ;;
    x86_64*-linux*)
        binutils_extra_config="LDFLAGS=-all-static"
        ;;
    i[3456789]86*-mingw32*)
        binutils_extra_config=""
        ;;
    *)
        binutils_extra_config=""
    esac

    # Configure.
    ${srcdir}/binutils/configure \
        --target=${binutils_target} \
        --host=${host_platform} \
        --build=${build_platform} \
        --prefix=$PREFIX \
        --with-pkgversion="AVR_8_bit_GNU_Toolchain_${avr_8_gnu_toolchain_version}_${BUILD_NUMBER}" \
        --with-bugurl="http://www.atmel.com" \
        --disable-nls \
        --enable-doc \
        --libdir=${PREFIX}/${LIB_DIR} \
        --infodir=${PREFIX}/info \
        --mandir=${PREFIX}/man \
        --docdir=${PREFIX}/doc/binutils \
        --disable-werror \
        --enable-install-libiberty \
        --enable-install-libbfd \
        > configure.out 2>&1 || task_error "configure failed. See configure.out."

    MAKEOPTS="all-bfd TARGET-bfd=headers"
    do_make "make bfd headers failed. See make.out."

    # Force reconfiguring.
    rm bfd/Makefile || task_error "Can't remove bfd/Makefile"
    MAKEOPTS=""

    # Build.
    make configure-host >> make.out 2>&1 || task_error "make configure-host failed. See make.out"
    make ${binutils_extra_config} all html >> make.out 2>&1 || task_error "make failed. See make.out."
    task_success

    # Install.
    task_start "Installing binutils for ${binutils_target}... "
    #do_make_install "make install failed. See make.install.out."
    # Do not call do_make_install() as binutils needs extra make targets.
    if test -z ${SUDO_PASSWORD}
    then
        make install install-html > make.install.out 2>&1 || task_error "make install failed. See make.install.out."
    else
        echo ${SUDO_PASSWORD}| sudo -S -E PATH=${PATH}:${PREFIX}/bin \
        make install install-html > make.install.out 2>&1 || task_error "make install failed. See make.install.out."
    fi

    do_popd
    MAKEOPTS=$OLD_MAKEOPTS

    task_success
}


function set_gcc_parameters()
{
    if test -f "${srcdir}/gcc/gcc/BASE-VER"; then
        gcc_version_base=$(cat ${srcdir}/gcc/gcc/BASE-VER)
        case ${gcc_version_base} in
               4.[3456].*)
                read gcc_version_atmel < ${srcdir}/gcc/gcc/ATMEL-VER
                ;;
               4.[12].*)
                # GCC 4.1.x or 4.2.x
                      gcc_version_atmel=`grep -E "define[[:space:]]{1,}VERSUFFIX" "${srcdir}/gcc/gcc/version.c" | sed -e 's/.*"\([^"]*\)".*/\1/'`

                # Add some version specific info for certain platforms
                case ${host_platform} in
                    i68[3456]-*mingw32 )
                        sed 's/\(.*VERSUFFIX "\)\([^"]*\)/\1\2 (mingw32 special)/' ${srcdir}/gcc/gcc/version.c > ${srcdir}/gcc/gcc/version.c.new \
                            || task_error "error adding '(mingw32 special)' to gcc/version.c"
                        mv -f ${srcdir}/gcc/gcc/version.c.new ${srcdir}/gcc/gcc/version.c || task_error "error renaming gcc/version.c"
                        ;;
                    i68[3456]-*mingw64 )
                        sed 's/\(.*VERSUFFIX "\)\([^"]*\)/\1\2 (mingw64 special)/' ${srcdir}/gcc/gcc/version.c > ${srcdir}/gcc/gcc/version.c.new \
                             || task_error "error adding '(mingw64 special)' to gcc/version.c"
                        mv -f ${srcdir}/gcc/gcc/version.c.new ${srcdir}/gcc/gcc/version.c || task_error "error renaming gcc/version.c"
                        ;;
                    * )
                        ;;
                esac
                ;;
            4.0.*)
                # GCC 4.0.x
                      gcc_version_atmel=`grep version_string "gcc/version.c" | sed -e 's/.*"\([^"]*\)".*/\1/'`
                # Add some version specific info for certain platforms
                case ${host_platform} in
                    i68[3456]-*mingw32 )
                        sed 's/\(.*VERSUFFIX "\)\([^"]*\)/\1\2 (mingw32 special)/' ${srcdir}/gcc/gcc/version.c > ${srcdir}/gcc/gcc/version.c.new \
                            || task_error "error adding '(mingw32 special)' to gcc/version.c"
                        mv -f ${srcdir}/gcc/gcc/version.c.new ${srcdir}/gcc/gcc/version.c || task_error "error renaming gcc/version.c"
                        ;;
                    i68[3456]-*mingw64 )
                        sed 's/\(.*VERSUFFIX "\)\([^"]*\)/\1\2 (mingw64 special)/' ${srcdir}/gcc/gcc/version.c > ${srcdir}/gcc/gcc/version.c.new \
                             || task_error "error adding '(mingw64 special)' to gcc/version.c"
                        mv -f ${srcdir}/gcc/gcc/version.c.new ${srcdir}/gcc/gcc/version.c || task_error "error renaming gcc/version.c"
                        ;;
                    * )
                        ;;
                esac
                ;;
            *)
            echo "unsupported GCC Version ${gcc_version_base}"
            exit 1
            ;;
        esac
    else
        # Cant't get gcc version, just set something usefull.
        gcc_version_base="4.3.2"
          gcc_version_atmel="atmel-$(date +%Y%m%d%H%M%Z)"
    fi

}


function gcc_prep()
{
    if test -f ${srcdir}/gcc/.prep_done
    then
        set_gcc_parameters
        return
    fi


    task_start "Preparing GCC... "
    do_pushd ${srcdir}

    rm -rf gcc gcc-[0-9]\.[0-9]\.[0-9] || task_error "Removing old gcc folders failed"

    upstream_source=$(ls ${srcdir}/gcc-*-patches/gcc-*.*.*)

    unpack_upstream_source ${srcdir} ${upstream_source}

    # Link the unpacked folder to a generic folder for futhure work
    ln -s $(ls -d gcc-[0-9]\.[0-9]\.[0-9])  gcc || task_error "Error linking gcc folder"
    apply_patches ${srcdir}/gcc $(ls -d ${srcdir}/gcc-*-patches)

    # Prepare for configuration.
    if [ ! -d ${srcdir}/gcc ] ; then
        echo "Can't find gcc source."
        exit 1
    fi
    set_gcc_parameters

    cd gcc
    case ${gcc_version_base} in
         4.[3456].*)
            # Some sed magic to make autotools work on platforms with different autotools version
            sed -i 's/m4_copy(\[AC_PREREQ\]/m4_copy_force(\[AC_PREREQ\]/g' ./config/override.m4 || task_error "sed failed"
            sed -i 's/m4_copy(\[_AC_PREREQ\]/m4_copy_force(\[_AC_PREREQ\]/g' ./config/override.m4 || task_error "sed failed"
            sed -i 's/  \[m4_fatal(\[Please use exactly Autoconf \]/  \[m4_errprintn(\[Please use exactly Autoconf \]/g' ./config/override.m4 || task_error "sed failed"
            autoconf || task_error "autoconf failed"
            # Running autoreconf in libstdc++ does not seem to be necessary in 4.3.x
            # and it causes some problems on platform with auto-tool >2.61
            ;;
         4.[012].*)
            ${AUTOCONF213_EXE} || task_error "autoconf failed"
            # TODO: Check if this autoreconf is necessary?
            # I do not remember why we have to do this in libstdc++
            # Its here because it has "always" been here.
            do_pushd libstdc++-v3
            autoreconf || task_error "libstdc++-v3 autoreconf failed"
            do_popd
            ;;
        *)
            echo "Unsupported GCC version ${gcc_version_base}"
            exit 1
            ;;
    esac

    do_popd
    task_success
    touch ${srcdir}/gcc/.prep_done
}


# First step building GCC.
# arg1 = target
function gcc_build_bootstrap()
{
    local gcc_target=${1}
    local gcc_extra_opts=""
    local gcc_doc_opts=""
    local gcc_extra_config=""
    local gcc_ldflags=""
    local gcc_cppflags=""

    task_start "Building bootstrap GCC for ${gcc_target}... "
    remove_build_folder "${gcc_target}-gcc-bootstrap"
    OLD_MAKEOPTS=$MAKEOPTS
    MAKEOPTS=""
    do_mkpushd ${builddir}/${gcc_target}-gcc-bootstrap

    # Are we doing a canadian cross?
    if ${canadian_cross}; then
        gcc_extra_opts=""
    else
        gcc_extra_opts=""
    fi

    case ${gcc_version_base} in
         4.[3456].*)
        gcc_extra_opts="${gcc_extra_opts} \
                   --with-pkgversion="AVR_Toolchain_3.0_$(date +%Y%m%d%H%M)" \
                   --with-bugurl="http://www.atmel.com"
                  "
        ;;

         *)
         # Do nothing
         ;;
    esac

    gcc_ldflags="-L${PREFIX}/${LIB_DIR}"

    # Configure.
    ${srcdir}/gcc/configure \
        "LDFLAGS=${gcc_ldflags}" "CPPFLAGS=${gcc_cppflags}" \
        --target=${gcc_target} \
        --host=${host_platform} \
        --build=${build_platform} \
        --prefix=${PREFIX} \
        --libdir=${PREFIX}/${LIB_DIR} \
        --enable-languages="c" \
        ${gcc_extra_opts} \
        --with-dwarf2 \
        --enable-doc \
        --disable-shared \
        --disable-libada \
        --disable-libssp \
        --disable-nls \
        --with-mpfr=${PREFIX} \
        --with-gmp=${PREFIX} \
        --with-mpc=${PREFIX} \
        > configure.out 2>&1 || task_error "configure failed. See configure.out."

    # Build.
    do_make "Building failed. See make.out."
    task_success

    # Install.
    task_start "Installing bootstrap GCC for ${gcc_target}... "
    do_make_install "Installing failed. See make.install.out."

    do_popd
    MAKEOPTS=$OLD_MAKEOPTS
    task_success
}


# Build GCC again, after avr-libc has been built.
# arg1 = target
function gcc_build_full()
{
    local gcc_target=${1}
    local gcc_extra_opts=""
    local gcc_doc_opts=""
    local gcc_extra_config=""
    local gcc_ldflags=""
    local gcc_cppflags=""

    task_start "Building full GCC for $1... "
    remove_build_folder "${1}-gcc-full"
    OLD_MAKEOPTS=$MAKEOPTS
    MAKEOPTS=""
    do_mkpushd ${builddir}/${1}-gcc-full
    # Are we doing a canadian cross?
    if ${canadian_cross}; then
        case ${host_platform} in
            i68[3456]-*mingw32 )
                gcc_extra_opts="--enable-win32-registry=avrtoolchain"
                #export LDFLAGS="-L ${PREFIX}/lib"
                #export CPPFLAGS="-I ${PREFIX}/include"

                ;;
            * )
                gcc_extra_opts=""
                ;;
        esac
    fi

    case ${gcc_version_base} in
        4.[456].*)
            gcc_extra_opts="${gcc_extra_opts} \
                --enable-fixed-point
            "
            gcc_extra_opts="${gcc_extra_opts} \
                   --with-pkgversion="AVR_8_bit_GNU_Toolchain_${avr_8_gnu_toolchain_version}_${BUILD_NUMBER}" \
                   --with-bugurl="http://www.atmel.com"
                  "
        ;;
        4.[3].*)
            gcc_extra_opts="${gcc_extra_opts} \
                   --with-pkgversion="AVR_8_bit_GNU_Toolchain_${avr_8_gnu_toolchain_version}_${BUILD_NUMBER}" \
                   --with-bugurl="http://www.atmel.com"
                  "
        ;;

         *)
         # Do nothing
         ;;
    esac

    # Make sure we always include the correct library folder when linking
    gcc_ldflags="-L${PREFIX}/${LIB_DIR}"

    # Add extra configs to be used when running make
    case "${host_platform}" in
        i[3456]86*-linux*)
            gcc_extra_config="LDFLAGS=-static"

            ;;
        x86_64*-linux*)
            gcc_extra_config="LDFLAGS=-static"
            ;;
        i[3456789]86*-mingw32*)
            gcc_extra_config=""
#	Commented out by pablaasmo due to problemes setting docdir for GCC 4.4.x
#            gcc_doc_opts="--infodir=${PREFIX}/info \
#                     --mandir=${PREFIX}/man \
#                     --docdir=${PREFIX}/doc/gcc/${gcc_version_base}"
            ;;
        *)
            gcc_extra_config=""
    esac

    # Configure.
    ${srcdir}/gcc/configure \
        "LDFLAGS=${gcc_ldflags}" "CPPFLAGS=${gcc_cppflags}" \
        --target=$1 \
        --host=${host_platform} \
        --build=${build_platform} \
        --prefix=${PREFIX} \
        --libdir=${PREFIX}/${LIB_DIR} \
        --enable-languages="c,c++" \
        --with-dwarf2 \
        --enable-doc \
        --disable-shared \
        --disable-libada \
        --disable-libssp \
        --disable-nls \
        --with-mpfr=${PREFIX} \
        --with-gmp=${PREFIX} \
        --with-mpc=${PREFIX} \
        ${gcc_extra_opts} \
        ${gcc_doc_opts} \
        > configure.out 2>&1 || task_error "configure failed. See configure.out."

    # Build.
    make ${gcc_extra_config} all html >> make.out 2>&1 || task_error "make failed. See make.out."
    task_success

    # Install.
    task_start "Installing full GCC for $1..."
    #do_make_install "make install failed. See make.install.out."
    # Do not call do_make_install() as gcc needs extra make targets.
    if test -z ${SUDO_PASSWORD}
    then
        make install install-html > make.install.out 2>&1 || task_error "make install failed. See make.install.out."
    else
        echo ${SUDO_PASSWORD}| sudo -S -E PATH=${PATH}:${PREFIX}/bin \
        make install install-html > make.install.out 2>&1 || task_error "make install failed. See make.install.out."
    fi

    do_popd
    MAKEOPTS=$OLD_MAKEOPTS
    task_success
}

function prep_headers () {
    task_start "Preparing Headers..."

    # Checking if headers exist. Error is it does not

    HEADER=$(ls -1 ${srcdir}/headers/ | tail -n 1)
    if test -z "$HEADER"
    then
      echo "No file present in the directory"
      exit 1
    fi

    # Unzipping the latest header in the
    unzip -o ${srcdir}/headers/$HEADER -d ${srcdir}/avr-headers-latest/

    # Copying non public header files to the avr location.
    for i in `find ${srcdir}/avr-headers-latest/avr/nonpublic -name *.h`
    do
      cp $i ${srcdir}/avr-headers-latest/avr/ -v
    done

    task_success
}

function replace_avr_headers()
{
    avr_headers_dir=$1
    avr_libc_srcdir=$2
    for i in ${avr_headers_dir}/avr/io[0-9a-zA-Z]*.h
    do
      # Copy the avr-headers generated header files but do not replace legacy headers
      # header_name=`basename $i`
      # if ! test -a ${avr_libc_srcdir}/include/avr/$header_name; then
        cp --verbose --force $i ${avr_libc_srcdir}/include/avr/ || task_error "Replacing avr-libc headers with avr-headers"
      # else
      #  echo "skipping: $header_name"
      # fi
    done
}

function avr_libc_prep()
{
    if test -f ${srcdir}/avr-libc/.prep_done
    then
        return
    fi

    task_start "Preparing avr-libc... "
    do_pushd ${srcdir}


    rm -rf avr-libc avr-libc-[0-9]\.[0-9]*\.[0-9] || task_error "Removing old avr-libc folders failed"

    upstream_source=$(ls ${srcdir}/avr-libc-*-patches/avr-libc-*.*.*)

    unpack_upstream_source ${srcdir} ${upstream_source}

    # Link the unpacked folder to a generic folder for futhure work
    ln -s $(ls -d avr-libc-[0-9]\.[0-9]*\.[0-9])  avr-libc || task_error "Error linking avr-libc folder"
    apply_patches ${srcdir}/avr-libc $(ls -d ${srcdir}/avr-libc-*-patches)

    if [ ! -d ${srcdir}/avr-libc ] ; then
        echo "Can't find avr-libc source."
        exit 1
    fi

    # Prepare the headers before replacing
    prep_headers
    # Replace the AVR-libc headers with the header files from avr-headers
    replace_avr_headers ${srcdir}/avr-headers-latest ${srcdir}/avr-libc

    # Run the bootstrap script.
    cd ${srcdir}/avr-libc
    ./bootstrap > preparation.out 2>&1

    do_popd
    task_success
    touch ${srcdir}/avr-libc/.prep_done
}


function avr_libc_build()
{
    task_start "Building avr-libc ... "
    remove_build_folder "avr-libc"
    OLD_MAKEOPTS=$MAKEOPTS
    MAKEOPTS=""
    do_mkpushd ${builddir}/avr-libc

    ${srcdir}/avr-libc/configure \
        --host=avr \
        --prefix="$PREFIX" \
        --libdir=${PREFIX}/${LIB_DIR} \
        --enable-doc \
        --disable-versioned-doc \
        --enable-html-doc \
        --enable-pdf-doc \
        --enable-man-doc \
        --mandir="$PREFIX"/man \
        --datadir="$PREFIX" \
        > configure.out 2>&1 || \
        task_error "configure failed. See configure.out"

    make >make.out 2>&1 || task_error "Building failed. See make.out."
    task_success

    # Installing.
    task_start "Installing avr-libc ... "
    make install >make-install.out 2>&1 || task_error "Installing avr-libc failed. See make.install.out."

    # todo: Convert line endings in examples, if host=mingw.
    # find $installdir/doc/avr-libc/examples -name '*.*' -print -exec $startdir/utils/bin/todos -o '{}' ';'


    # todo: Move man pages.
    # cp -rf "$PREFIX"/doc/avr-libc/man "$PREFIX"/man
    # rm -rf "$PREFIX"/doc/avr-libc/man


    do_popd
    MAKEOPTS=$OLD_MAKEOPTS
    task_success
}


function set_gdb_parameters()
{
    if test -f "${srcdir}/gdb/bfd/ATMEL-VER"; then
        read gdb_version_atmel < ${srcdir}/gdb/bfd/ATMEL-VER
    else
        gdb_version_atmel="atmel-$(date +%Y%m%d%H%M%Z)"
    fi
}


function gdb_prep()
{
    if test -f ${srcdir}/gdb/.prep_done
    then
        set_gdb_parameters
        return
    fi

    task_start "Preparing GDB... "

    do_pushd ${srcdir}
    rm -rf gdb gdb-[0-9]\.[0-9]* || task_error "Removing old gdb folders failed"
    upstream_source=$(ls ${srcdir}/gdb-*-patches/gdb-*.*)
    unpack_upstream_source ${srcdir} ${upstream_source}

    # Link the unpacked folder to a generic folder for futhure work
    ln -s $(ls -d gdb-[0-9]\.[0-9]*)  gdb || task_error "Error linking gcc folder"
    apply_patches ${srcdir}/gdb $(ls -d ${srcdir}/gdb-*-patches)

    if [ ! -d ${srcdir}/gdb ] ; then
        echo "Can't find gdb source."
        exit 1
    fi
    set_gdb_parameters

    do_popd
    task_success
    touch ${srcdir}/gdb/.prep_done
}


function gdb_build()
{
    task_start "Building GDB for $1... "
    remove_build_folder "${1}-gdb"
    OLD_MAKEOPTS=$MAKEOPTS
    MAKEOPTS=""
    do_mkpushd ${builddir}/${1}-gdb

    # Are we doing a canadian cross?
    if ${canadian_cross}; then
        case ${host_platform} in
            i[3456]86-*mingw32 )
                export LDFLAGS="-L${PREFIX}/lib"
                export CPPFLAGS="-I${PREFIX}/include"
                ;;
            i[3456]86*-linux*)
                export LDFLAGS="-static"
                ;;
            * )
                ;;
        esac
    else
        export LDFLAGS="-static"
    fi


    # only from version 7.0 is --with-pkgversion and bugurls supported
#    LDFLAGS='-static' \
    CFLAGS="-I${PREFIX}/include -L${PREFIX}/lib" \
    ${srcdir}/gdb/configure \
        --with-pkgversion="AVR_8_bit_GNU_Toolchain_${avr_8_gnu_toolchain_version}_${BUILD_NUMBER}"\
        --with-bugurl="http://www.atmel.com"\
        --target=$1 \
        --host=${host_platform} \
        --build=${build_platform} \
        --libdir=${PREFIX}/${LIB_DIR} \
        --prefix="$PREFIX" \
        --disable-nls \
        --disable-werror \
        > configure.out 2>&1 \
        || task_error "configure for $1 failed. See configure.out"

    # Build.
    do_make "Building for $1 failed. See make.out."
    task_success

    # Install.
    task_start "Installing GBD for $1... "
    do_make_install "Installing GDB for $1 failed. See make.install.out."
    do_popd


    MAKEOPTS=$OLD_MAKEOPTS
    task_success
}
function mpfr_prep() {
    task_start "Unpacking mpfr... "
    tar --extract --ungzip --directory ${srcdir} --file ${srcdir}/mpfr/mpfr*.tar.gz ||\
     task_error "Failed to unpack mpfr"
    task_success
}


function mpfr_build() {

    task_start "Building libmpfr ..."
    remove_build_folder "mpfr"
    do_mkpushd ${builddir}/mpfr

    CFLAGS="-fPIC" $(ls -d ${srcdir}/mpfr-*)/configure \
        --build=${build_platform} \
        --host=${host_platform} \
        --prefix=${PREFIX} \
        --libdir=${PREFIX}/${LIB_DIR} \
        --with-gmp=${PREFIX} \
        --disable-shared \
        --enable-static \
        > configure.out 2>&1 || task_error "configure failed. See configure.out."

    do_make  "Failed building libmphr. See make.out"
    task_success
    task_start "Installing mpfr ..."
    do_make_install "make install failed. See make.install.out."
    do_popd
    task_success

}

function gmp_prep() {
    task_start "Unpacking gmp... "
    upstream_source=$(ls ${srcdir}/gmp/gmp*)
    unpack_upstream_source ${srcdir} ${upstream_source}
    task_success
}


function gmp_build() {

    task_start "Building libgmp ..."
    remove_build_folder "gmp"
    do_mkpushd ${builddir}/gmp

    CC_FOR_BUILD="gcc" CFLAGS="-fPIC" $(ls -d ${srcdir}/gmp-[0-9].*)/configure \
        --build=${build_platform} \
        --host=${host_platform} \
        --libdir=${PREFIX}/${LIB_DIR} \
        --prefix=${PREFIX} \
        --disable-shared \
        --enable-static \
        > configure.out 2>&1 || task_error "configure failed. See configure.out."

    do_make  "Failed building libgmp. See make.out"
    task_success
    task_start "Installing gmp ..."
    do_make_install "make install failed. See make.install.out."
    do_popd
    task_success

}

function mpc_prep() {
    task_start "Unpacking mpc... "
    upstream_source=$(ls ${srcdir}/mpc/mpc*)
    unpack_upstream_source ${srcdir} ${upstream_source}
    task_success
}


function mpc_build() {

    task_start "Building libmpc ..."
    remove_build_folder "mpc"
    do_mkpushd ${builddir}/mpc

    CFLAGS="-fPIC" $(ls -d ${srcdir}/mpc-[0-9].[0-9]*)/configure \
        --build=${build_platform} \
        --host=${host_platform} \
        --libdir=${PREFIX}/${LIB_DIR} \
        --disable-shared \
        --enable-static \
        --prefix=${PREFIX} \
        --with-mpfr=${PREFIX} \
        --with-gmp=${PREFIX} \
        > configure.out 2>&1 || task_error "configure failed. See configure.out."

    do_make  "Failed building libmpc. See make.out"
    task_success
    task_start "Installing mpc ..."
    do_make_install "make install failed. See make.install.out."
    do_popd
    task_success

}

function ncurses_prep() {
    task_start "Unpacking ncurses... "
    upstream_source=$(ls ${srcdir}/ncurses/ncurses*)
    unpack_upstream_source ${srcdir} ${upstream_source}
    task_success
}


function ncurses_build() {
    task_start "Building ncurses ..."
    remove_build_folder "ncurses"
    do_mkpushd ${builddir}/ncurses

    CFLAGS="-fPIC" $(ls -d ${srcdir}/ncurses-[0-9].*)/configure \
        --build=${build_platform} \
        --host=${host_platform} \
        --libdir=${PREFIX}/${LIB_DIR} \
        --without-shared \
        --without-sysmouse \
        --without-progs \
        --enable-termcap \
        --prefix=${PREFIX} \
        > configure.out 2>&1 || task_error "configure failed. See configure.out."

    do_make  "Failed building ncurses. See make.out"
    task_success
    task_start "Installing ncurses ..."
    do_make_install "make install failed. See make.install.out."
    do_popd
    task_success
}

############# Start of main program. ####################
start_timer

############ Set up some usable variables #######################
SUDO_PASSWORD=
KEEP_BUILD_FOLDER="NO"
TIMESTAMP=$(date +%Y%m%d%H%M)
binutils_version_atmel="atmel-$(date +%Y%m%d%H%M%Z)"
gcc_version_atmel="atmel-$(date +%Y%m%d%H%M%Z)"
gdb_version_atmel="atmel-$(date +%Y%m%d%H%M%Z)"
platform_version=""
srcdir=
builddir=
execdir=`pwd`

# Set Toolchain version number
# Use env variable AVR_GNU_TOOLCHAIN_VERSION if set
avr_8_gnu_toolchain_version=${AVR_8_GNU_TOOLCHAIN_VERSION:-"3.2.0"}

# Set BUILD_NUMBER
# BUILD_NUMBER is set by Hudson build server or can be set before running this script
# If not set we use the date
BUILD_NUMBER=${BUILD_NUMBER:-$(date +%Y%m%d%H%M)}

# Set defaults
canadian_cross=false
build_platform=$(uname -i)-pc-linux-gnu
host_platform=$(uname -i)-pc-linux-gnu
distribution="unknown"

# Set up the packages to build
# The order gives the build order and is significant
#packages="avr-binutils avr-gcc-bootstrap avr-libc avr-gcc-full avr-gdb"
# avr-gdb is removed from package (binutils-2.22's bfd causes avr-gdb to fail)
packages="avr-binutils avr-gcc-bootstrap avr-libc avr-gcc-full"

# See if we need to change or set some defaults
if test "${OSTYPE}" = "cygwin"
then
    build_platform=i686-pc-cygwin
    host_platform=i686-pc-cygwin
elif test "${OSTYPE}" = "msys"
then
    build_platform=i686-pc-mingw32
    host_platform=i686-pc-mingw32
else
    distribution=`lsb_release -i | cut -f2` || echo "WARNING: Couldn't determine which distribution"
fi

# Ubuntu has some strange naming of old autoconf-2.13
if test ${distribution} = "Ubuntu"
then
    AUTOCONF213_EXE=autoconf2.13
else
    AUTOCONF213_EXE=autoconf-2.13
fi


############ Get and decode options given #########################
while getopts "B:b:klhH:p:P:s:T:" options; do
  case $options in
      B ) build_platform=$OPTARG
          ;;
      b )	builddir=$OPTARG
          ;;
      H ) host_platform=$OPTARG
          ;;
      k )
          KEEP_BUILD_FOLDER="YES"
          ;;
      l )
          echo "Default packages and build order:"
          for package in $packages
          do
              echo $package
          done
          exit 1
          ;;
    p )	AVR_PREFIX=$OPTARG
        ;;
    P ) SUDO_PASSWORD=$OPTARG
        ;;
      s )	srcdir=$OPTARG
          ;;
    h ) echo "$usage"
        exit 1;;
    \? ) echo "$usage"
         exit 1;;
    * ) echo "$usage"
          exit 1;;

  esac
done

shift $(($OPTIND - 1)) ## no need for expr in bash or other POSIX shell


######### Set packages to arguments given or to default ###########
if test $# -ne 0
then
    packages="$@"
fi


############ Check for source directory ###########################
if test -z $srcdir
then
    echo "Using current directory as source folder."
    srcdir=$(pwd)
else
    echo "Using '${srcdir}' as source folder."
fi

if [ -d ${srcdir} ]
then
    # Convert path to absolute path
    srcdir=$(cd ${srcdir}; pwd)
else
    echo "Error: Can't find source folder!"
    exit 1
fi


############ Make the build dir ###################################
builddir="${builddir:-build}"
mkdir -p ${builddir} || task_error "Cannot create build folder"

# Get absolute path for builddir
builddir=$(cd ${builddir}; pwd)

############# Set correct libdir #################################
case "${host_platform}" in
    i[3456]86-*-linux-gnu*)
        LIB_DIR=lib
        ;;
    x86_64*-linux*)
        LIB_DIR=lib
        ;;
    *)
        LIB_DIR=lib
        ;;
esac

######### Check for crosscompile ###############

# If build_platform != host_platform != target_platform
# then we are doing canadian cross
# since target always is avr32 or avr32-linux we check only
# the build and host platforms
if test ${host_platform} != ${build_platform}
then
    canadian_cross=true;
fi

# Set some platform variables
case "${host_platform}" in
    i[3456]86*-linux*)
        platform_version="\(linux32_special\)"
        ;;
    x86_64*-linux*)
        platform_version="\(linux64_special\)"
        ;;
    i[3456]86*-cygwin*)
        platform_version="\(cygwin_special\)"
        ;;
    i[3456789]86*-mingw32*)
        # Maybe check for some prerequisite?
        export CFLAGS="-D__USE_MINGW_ACCESS"
        platform_version="\(mingw32_special\)"
        ;;
    sparc*-sun-solaris2.[56789]*)
        ;;
    sparc*-sun-solaris*)
        ;;
    mips*-*-elf*)
        ;;
    * )
        echo "Unknown host platform: ${host_platform}"
        ;;
esac


############ Set PREFIX ############################
PREFIX="${AVR_PREFIX:-/usr/local}"
# Make sure it is absolute path
PREFIX=$(cd ${PREFIX}; pwd)

PATH=$PATH:$PREFIX/bin
export PATH

############# Check if user has write access to prefix folder ####
if test ! -w ${PREFIX} -a -z "${SUDO_PASSWORD}"
then
    echo "WARNING! You do not have write access to the $PREFIX folder! Installation will fail."
fi


############# Check for necessary programs #######################
for PREREQ in autoconf make gcc tar patch \
    pdflatex pngtopnm epstopdf
do
    RUN=`type -ap $PREREQ |sort |uniq |wc -l`
    if [ $RUN -eq 0 ]
    then
        echo "$PREREQ is not found in command path. Can't continue"
        exit 1
    elif [ $RUN -gt 1 ]
    then
        echo -n "Found multiple versions of $PREREQ, using the one at "
        type -p $PREREQ
    fi
done


############# First we make necessary preparations ###############
for part in ${packages}
do
    case ${part} in
        "avr-binutils" )
            binutils_prep
            ;;
        "avr-gcc-bootstrap" | "avr-gcc-full" )
            gmp_prep
            mpfr_prep
            mpc_prep
            gcc_prep
            ;;
        "avr-libc" )
            avr_libc_prep
            ;;
        "avr-gdb" )
            ncurses_prep
            gdb_prep
            ;;
        * )
            echo "Error: Unknown package ${part}."
            exit 1
            ;;
    esac
done


############# Building and installing ###########
# The order of building is given by the order in the packages variable
for part in ${packages}
do
    case ${part} in
        "avr-binutils" )
            binutils_build "avr"
            ;;
        "avr-gcc-bootstrap" )
            gmp_build
            mpfr_build
            mpc_build
            gcc_build_bootstrap "avr"
            ;;
        "avr-libc" )
            avr_libc_build
            ;;
        "avr-gcc-full" )
            case ${host_platform} in
                i68[3456]-*mingw32 )
                    # we asume gmp and mpfr binaries is preinstalled.
                    gmp_build
                    mpfr_build
                    ;;
                *linux* )
                    gmp_build
                    mpfr_build
                    ;;
                * )
                    ;;
            esac
            mpc_build
            gcc_build_full "avr"
            ;;
        "avr-gdb" )
            case ${host_platform} in
                i68[3456]-*mingw32 )
                    # we asume libtermcap binaries is preinstalled.
                    ;;
                *linux* )
                    ncurses_build
                    ;;
                * )
                    ;;
            esac
            gdb_build "avr"
            ;;
        * )
            echo "Error: Unknown package ${part}."
            exit 1
            ;;
    esac
done



end_timer
report_time
exit 0


##################################################################
# Now you should have a complete development enviroment for avr
# installed at 'prefix' location.