#
# Based on crosstool by Dan Kegel
#

export GNU_SITE=http://mirror.csclub.uwaterloo.ca/gnu
export OLD_PATH=$PATH

export BUILD=i386-pc-solaris2.11
export HOST=i486-kopensolaris-gnu
export TARGET=$HOST
export ROOT=/opt/gnu-toolchain
export SYSROOT=$ROOT/$TARGET
export BUILD_ROOT=$ROOT/src
export ROOT_GCC_CORE=$BUILD_ROOT/install_gcc-core/bin
export CHROOT=/opt/gnu-chroot

export PATH=$ROOT/bin:$ROOT_GCC_CORE/bin:$OLD_PATH

# tarballs and patches
mkdir -p $BUILD_ROOT; cd $BUILD_ROOT
wget $GNU_SITE/glibc/glibc-2.7.tar.bz2
wget $GNU_SITE/binutils/binutils-2.18.tar.bz2
wget $GNU_SITE/gcc/gcc-4.2.4/gcc-4.2.4.tar.bz2
wget http://csclub.uwaterloo.ca/~dtbartle/opensolaris/config.guess
wget http://csclub.uwaterloo.ca/~dtbartle/opensolaris/config.sub
wget http://csclub.uwaterloo.ca/~dtbartle/opensolaris/binutils-2.18-kopensolaris-gnu.diff
wget http://csclub.uwaterloo.ca/~dtbartle/opensolaris/gcc-4.2.4-kopensolaris-gnu.diff
wget http://csclub.uwaterloo.ca/~dtbartle/opensolaris/glibc-2.7-kopensolaris-gnu.diff.gz
tar -xjf binutils-2.18.tar.bz2
cd binutils-2.18
patch -p1 < ../binutils-2.18-kopensolaris-gnu.diff
cp ../config.{guess,sub} .
cd ..
tar -xjf gcc-4.2.4.tar.bz2
cd gcc-4.2.4
patch -p1 < ../gcc-4.2.4-kopensolaris-gnu.diff
cp ../config.{guess,sub} .
cd ..
tar -xjf glibc-2.7.tar.bz2
cd glibc-2.7
gunzip -c ../glibc-2.7-kopensolaris-gnu.diff.gz | patch -p1
cp ../config.{guess,sub} scripts
cd ..

# binutils
mkdir build_binutils; cd build_binutils
../binutils-2.18/configure --target=$TARGET --prefix=$ROOT --with-sysroot=$SYSROOT
make all
make install
cd ..

# gcc-core
mkdir build_gcc-core; cd build_gcc-core
../gcc-4.2.4/configure --target=$TARGET --prefix=$ROOT_GCC_CORE --disable-multilib \
    --disable-nls --enable-threads=no --enable-symvers=gnu \
    --disable-shared --enable-languages=c,c++ --without-headers
make all-gcc
make install-gcc
mkdir -p $ROOT_GCC_CORE/$TARGET/bin
for tool in ar as ld strip; do
    ln -s $SYSROOT/bin/$tool $ROOT_GCC_CORE/$TARGET/bin/$tool
done
cd ..

# glibc (headers and libs only)
cd $BUILD_ROOT
mkdir build_glibc; cd build_glibc
CC="$TARGET-gcc -march=i586" libc_cv_forced_unwind=yes libc_cv_c_cleanup=yes \
    ../glibc-2.7/configure --build=$BUILD --host=$HOST --prefix=
make lib
make install_root=$SYSROOT install-headers install-lib-all
cp bits/stdio_lim.h $SYSROOT/include/bits/stdio_lim.h
cp ../glibc-2.7/include/gnu/stubs.h $SYSROOT/sys-include/gnu/stubs.h
cd ..

# gcc
mkdir build_gcc; cd build_gcc
../gcc-4.2.4/configure --target=$TARGET --prefix=$ROOT \
    --with-headers=$SYSROOT/include --with-local-prefix=$SYSROOT \
    --enable-multilib --disable-libgomp --enable-languages=c,c++ \
    --with-arch=i586
make all
make install
cd ..

# glibc (chroot)
rm -rf build_glibc; mkdir build_glibc; cd build_glibc
../glibc-2.7/configure --prefix=/usr --build=$BUILD --host=$HOST \
    --sysconfdir=/etc
make all
make install_root=$CHROOT install
cp $CHROOT/usr/include/gnu/stubs*.h $SYSROOT/sys-include/gnu
cd ..

export PATH=$OLD_PATH

#
# libtool
#
# In order to compile many packages, you need to update libtool. This can be
# done by running autoreconf. Alternatively, the package's configure can be
# modified:
#
# In general, anything like this:
#
#   # This must be Linux ELF.
#   linux*)
#
# should be changed to:
#
#   # This must be Linux ELF.
#   linux* | kopensolaris*-gnu)
#
# Also, any instances of k*bsd*-gnu should be modified to also include
# kopensolaris*-gnu.
#

#
# Packages that should be cross-compiled and installed to the chroot:
#
#   bash, coreutils, make, libiconv, pcre, grep, autoconf, automake,
#     m4, gawk, sed, binutils, gcc, gzip, bzip2, tar, diffutils,
#     ncurses, texinfo, wget, findutils
#
# These commands can generally be used to cross-compile:
#   # Change the . below to the actual location of config.{sub,guess} in
#   #   the source (e.g. build-aux, scripts, etc...).
#   cp $BUILD_ROOT/config.sub $BUILD_ROOT/config.guess .
#   ./configure --build=$BUILD --host=$HOST --prefix=/usr --sysconfdir=/etc \
#       --localstatedir=/var --enable-shared
#   make all
#   make DESTDIR=$CHROOT install
#
# coreutils:
#
#   You must remove 'binPROGRAMS_INSTALL=./ginstall' from src/Makefile.
#
# grep:
#
#   You must add the following to the configure line:
#
#     --disable-perl-regexp
#
# gcc:
#
#  In gcc/Makefile.in, change:
#
#
#  to:
#
#    SYSTEM_HEADER_DIR = ${CHROOT}/usr/include
#
# gzip:
#
#   Apply this patch:
#
#     http://cvs.fedoraproject.org/viewvc/devel/gzip/gzip-1.3.12-futimens.patch?revision=1.1
#
# ncurses:
#
#   You should build ncurses and install it to the toolchain directory:
#
#     ./configure --build=$BUILD --host=$HOST --prefix=$SYSROOT
#     make all
#     make install
#