#!/bin/bash

#
# Build a mingw64 compiler for doing x64 compiles.
#

###
### CYGWIN :: Make sure that cygwin is mouting its file systems in binmode.
###

#
# Specify the architectures for which the tools are to be built
#
TARGS="${TARGS:-x86_64-pc-mingw32}"

# Let's be nice
renice 10 -p $$

# If any thing goes wrong, we'll bail out.
set -e

#
# Specify the versions
#
GCC_VERSION=4.3-20071207
BINUTILS_VERSION=2.17.50.0.18
MINGW_HEADERS_VERSION=20070802

_GCC_=gcc-${GCC_VERSION}
_BINUTILS_=binutils-${BINUTILS_VERSION}
_MINGW_HEADERS_=mingw-w64-headers-${MINGW_HEADERS_VERSION}

export PATH=/bin:/usr/bin:/usr/local/bin

#
# Where to install
#
PREFIX="${PREFIX:-/opt/tiano/}"

#
# Where to get the GNU tools
#
BINUTILS_URL=http://www.kernel.org/pub/linux/devel/binutils/${_BINUTILS_}.tar.bz2
GCC_URL=ftp://gd.tuwien.ac.at/gnu/gcc/snapshots/${GCC_VERSION}/${_GCC_}.tar.bz2
MINGW_HEADERS_URL=http://superb-west.dl.sourceforge.net/sourceforge/mingw/${_MINGW_HEADERS_}.tar.bz2

#
# Uncomment one of the following depending upon which your system provides
#
#GET_COMMAND="curl --remote-name"
GET_COMMAND="wget -c -nc --no-directories --retr-symlinks "

#
# Allow environment to override some programs
#
MAKE="${MAKE:-make}"
export MAKE
SHELL="${SHELL:-/bin/sh}"
export SHELL

#
# Get the source
# If you don't have curl on your machine, try using
#     wget --passive-ftp --no-directories --retr-symlinks <<url>>
# If that doesn't work, try without the --passive-ftp option.
#
getSource() {
    ${GET_COMMAND}  "${BINUTILS_URL}"
    ${GET_COMMAND}  "${GCC_URL}"
    ${GET_COMMAND}  "${MINGW_HEADERS_URL}"
    wait
}

#
# Unpack the source
#
unpackSource() {
    (rm -rf "${_BINUTILS_}"
    tar jxf "${_BINUTILS_}.tar.bz2"
    )

    (rm -rf "${_GCC_}"
    tar jxf "${_GCC_}.tar.bz2"
    )

    (rm -rf "include"
    tar jxf "${_MINGW_HEADERS_}.tar.bz2"
    )

    wait
}

CONF_SHELL="${CONF_SHELL:-/bin/bash}"
# CONF_SHELL="${CONF_SHELL:-echo}"

#
# Build
#
build() {
    for targ in $TARGS
    do (
        export pref=${PREFIX}${targ}
        export PATH="${pref}/bin:$PATH"
        rm -f ${targ}.log

        (
	    rm -rf build-binutils-$targ
	    mkdir -p build-binutils-$targ
            cd build-binutils-$targ
            "${CONF_SHELL}" "../${_BINUTILS_}/configure" \
                --disable-nls "--target=${targ}" "--prefix=${pref}"
            ${MAKE} -j1 -w all
            ${MAKE} -w install
        ) >> ${targ}.log 2>&1 

        (
            mkdir -p $pref/$targ/include;
	    cp -fr include/* $pref/$targ/include
	    ln -s $pref/$targ $pref/mingw
	    ln -s $pref/$targ/include $pref/$targ/sys-include
        ) 


        (
	    rm -rf build-gcc-$targ
	    mkdir -p build-gcc-$targ
            cd build-gcc-$targ
            "${CONF_SHELL}" "../${_GCC_}/configure" "--target=${targ}" \
	        "--prefix=${pref}" \
	        --without-headers --with-newlib --verbose \
                --disable-libssp --disable-nls --enable-languages=c
            ${MAKE} -j1 -w all
            ${MAKE} -w install
        ) >> ${targ}.log 2>&1

        # GCC 4.3 needs the symbol links for the gcc and binutils. Otherwise
	# the cc1 and as, ld etc can not be found by gcc.
	(
	    rm -f $pref/$targ/bin/*
	    ln -s $pref/bin/$targ-ar $pref/$targ/bin/ar
	    ln -s $pref/bin/$targ-as $pref/$targ/bin/as
	    ln -s $pref/bin/$targ-dlltool $pref/$targ/bin/dlltool
	    ln -s $pref/bin/$targ-gcc $pref/$targ/bin/gcc
	    ln -s $pref/bin/$targ-ld $pref/$targ/bin/ld
	    ln -s $pref/bin/$targ-nm $pref/$targ/bin/nm
	    ln -s $pref/bin/$targ-objcopy $pref/$targ/bin/objcopy
	    ln -s $pref/bin/$targ-objdump $pref/$targ/bin/objdump
	    ln -s $pref/bin/$targ-ranlib $pref/$targ/bin/ranlib
	    ln -s $pref/bin/$targ-strip $pref/$targ/bin/strip
	)
    )
    done

    wait
}



#
# Do everything
#
# Comment out any activities you wish to omit
#
getSource
unpackSource
build