#!/bin/sh
#this is a bash shell script to make a linux/cygwin32 cross compiler
#it is designed to hopefully :^) minimize disk space usage, and
#maximize the speed of the resulting cross-compiler
set -a #export all variables

#echo change the following variables to fit your setup

CROSS_PREFIX=/dos/c/usr
CWD=`pwd`
GXXINCLUDE=$CROSS_PREFIX/include/g++
MY_HOST_COMPILER=i586-unknown-linux
CC=gcc
CPPNAME="gcc -E"
SRC_DIR=$CROSS_PREFIX/src/cygwin32
CYG_VER=cygnus-2.7.2-961023

if [ ! -f $SRC_DIR/CYGNUS ];then
 echo "please show me the source Luke :^)"
 exit 1;
fi

# first make sure only the necessary dirs get built
[ -d $SRC_DIR/znobuild ] || mkdir -p $SRC_DIR/znobuild
if [ -d $SRC_DIR/byacc ];then
  pushd $SRC_DIR
  mv -f bash byacc dejagnu diff dosrel expect fileutils findutils flex gawk \
    gdb gprof grep grez gzip less libg++ libgloss libio librx libstdc++ m4 \
    make mmalloc ncurses newlib patch readline release sed send-pr \
    shellutils sim tar tcl texinfo textutils time tk utils winsup xiberty \
    znobuild/
  popd
fi 

if [ x"$TMP" = x ];then
  [ -d /tmp ] || mkdir /tmp
  TMP=/tmp;
fi

cd $TMP
mkdir -p cx32o tmp/usr

if [ ! -f $SRC_DIR/binutils/Makefile.in.* ];then
	patch -p0 -d $SRC_DIR/binutils/ < $CWD/ar_obj.dif;
fi
if [ ! -f $SRC_DIR/gas/Makefile.in.* ];then
	patch -p0 -d $SRC_DIR/gas/ < $CWD/gas.dif;
fi
 
cd cx32o

if [ ! -f config.status ];then
    $SRC_DIR/configure --prefix=/usr\
      --enable-commonbfdlib --enable-shared\
      --host=$MY_HOST_COMPILER\
      --target=i386-cygwin32 -v 
fi

make CFLAGS="-O3 -m486 -malign-jumps=2 -malign-functions=2 -malign-loops=2 -fno-strength-reduce" LDFLAGS=-s

make CFLAGS="-O3 -m486 -malign-jumps=2 -malign-functions=2 -malign-loops=2 -fno-strength-reduce" LDFLAGS=-s -C binutils/ ar_with_ranlib objcopy_with_strip

make prefix=$TMP/tmp/usr install

#this causes a bad invocation of cpp at least for me :^) so get rid of it.

sed s/%\\[cpp_cpu\\]// < gcc/specs > $TMP/tmp/usr/lib/gcc-lib/i386-cygwin32/$CYG_VER/specs

cd ../tmp/usr/bin
rm protoize unprotoize
ln -sf i386-cygwin32-ar i386-cygwin32-ranlib
ln -sf i386-cygwin32-objcopy i386-cygwin32-strip
ln -sf i386-cygwin32-g++ i386-cygwin32-c++
strip *
cd ../lib
rm -fr *.a ../man ../info
strip * 
cd ../include
ln -sf GXXINCLUDE g++cygwin32
cd ../i386-cygwin32/bin
rmdir ../install-tools #how this got here I have no idea :)
ln -sf ../../bin/i386-cygwin32-ar ranlib
ln -sf ../../bin/i386-cygwin32-ar ar
ln -sf ../../bin/i386-cygwin32-gcc gcc
ln -sf ../../bin/i386-cygwin32-as as
ln -sf ../../bin/i386-cygwin32-dlltool dlltool
ln -sf ../../bin/i386-cygwin32-ld ld
ln -sf ../../bin/i386-cygwin32-nm nm
ln -sf ../../bin/i386-cygwin32-objcopy strip
# for when you have to reset path in the Makefile to use all cross tools
ln -sf ../../bin/i386-cygwin32-g++ g++
ln -sf ../../bin/i386-cygwin32-g++ c++
ln -sf ../../bin/i386-cygwin32-c++filt c++filt
ln -sf ../../bin/i386-cygwin32-gasp gasp
ln -sf ../../bin/i386-cygwin32-objcopy objcopy
ln -sf ../../bin/i386-cygwin32-objdump objdump
ln -sf ../../bin/i386-cygwin32-size size
ln -sf ../../bin/i386-cygwin32-strings strings
rm -fr ../include ../lib
cd ..
ln -s $CROSS_PREFIX/H-i386-cygwin32/i386-cygwin32/include include
ln -s $CROSS_PREFIX/H-i386-cygwin32/i386-cygwin32/lib lib
cd ../lib/gcc-lib/i386-cygwin32/$CYG_VER/
strip c* ld
rm -fr include
ln -s $CROSS_PREFIX/H-i386-cygwin32/lib/gcc-lib/i386-cygwin32/$CYG_VER/include include

cd $TMP/tmp
makepkg cx32.tgz;mv cx32.tgz .. # or put your binary package maker here
cd $TMP

if [ x"$1" = x--cleanup ];then
	rm -fr $TMP/tmp $TMP/cx32o;
        pushd $SRC_DIR
	mv -f znobuild/* .
	rmdir znobuild
	popd
fi