#! /bin/bash

# This script can be used to generate some unregisterised .hc files
# for bootstrapping GHC on a new/unsupported platform.  It involves a
# two-stage bootstrap: the first stage builds an unregisterised set of
# libraries & RTS, and the second stage builds an unregisterised
# compiler.  

# Take the .hc files from the libraries of stage 1, and the compiler
# of stage 2, to the target system and bootstrap from these to get a
# working (unregisterised) compiler.

set -e

base=`pwd`

# set this to the location of your source tree
fptools_dir=/home/igloo/ghc6/m68k/ghc-6.0.1
arch=m68k-unknown-linux-gnu

cp configure $fptools_dir

if [ ! -f b1-stamp ]; then
  mkdir b1
  cd b1
   lndir $fptools_dir

   ########################
   ./configure

   cd glafp-utils
   make boot
   make
   cd ..

   cd ghc/includes
   make config.h
   cd ../utils
   make boot
   make
   cd ../..
   ########################
   
   ./configure --target=$arch --host=$arch --build=$arch

   cd ghc/rts
   make package.conf.inplace
   cd ../..
   rm ghc/rts/Makefile || true
   echo "boot: package.conf.inplace" > ghc/rts/Makefile
   echo "all:" >> ghc/rts/Makefile
   echo "	../../ghc/utils/ghc-pkg/ghc-pkg-inplace --update-package < package.conf.inplace" >> ghc/rts/Makefile
   echo "clean:" >> ghc/rts/Makefile

   # Needed for at least libraries/base/GHC/Float.hc
   rm libraries/mk/boilerplate.mk || true
   cp ../libraries-boilerplate.mk libraries/mk/boilerplate.mk
   rm hslibs/mk/boilerplate.mk || true
   cp ../hslibs-boilerplate.mk hslibs/mk/boilerplate.mk

   # For cross-compilation, at this stage you may want to set up a source
   # tree on the target machine, run the configure script there, and bring
   # the resulting mk/config.h file back into this tree before building
   # the libraries.
   rm mk/config.h
   cp ../config.h mk

   touch mk/build.mk
   echo "GhcUnregisterised = YES" >> mk/build.mk
   echo "GhcLibHcOpts = -O -H32m -fvia-C -keep-hc-files" >> mk/build.mk
   echo "GhcLibWays =" >> mk/build.mk
   echo "SplitObjs = NO" >> mk/build.mk
   echo "GhcWithNativeCodeGen=NO" >> mk/build.mk

   # We could optimise slightly by not building hslibs here.  Also, building
   # the RTS is not necessary (and might not be desirable if we're using
   # a config.h from the target system).
   make stage1

  cd ..

  touch b1-stamp
fi

# exit 0

if [ ! -f b2-stamp ]; then
  mkdir b2
  cd b2
   lndir $fptools_dir
   #rm -rf glafp-utils ghc/utils
   #ln -s ../b0/glafp-utils glafp-utils
   #ln -s ../../b0/ghc/utils ghc/utils

   ########################
   ./configure

   cd glafp-utils
   make boot
   make
   cd ..

   cd ghc/includes
   make config.h
   cd ../utils
   make boot
   make
   cd ../..
   ########################
   
   ./configure --with-ghc="$base/b1/ghc/compiler/stage1/ghc-inplace" --target=$arch --host=$arch --build=$arch

   mv ghc/mk/boilerplate.mk ghc/mk/boilerplate.mk.aswas
   cp ../ghc-boilerplate.mk ghc/mk/boilerplate.mk

   rm mk/config.h
   cp ../config.h mk

   rm ghc/compiler/Makefile
   cp ../Makefile ghc/compiler

   touch mk/build.mk
   #echo "GhcHcOpts = -O -H32m -fvia-C -keep-hc-files" >> mk/build.mk
   echo "GhcUnregisterised = YES" >> mk/build.mk
   echo "SRC_HC_OPTS += -keep-hc-file -fvia-C" >> mk/build.mk
   echo "GhcWithNativeCodeGen = NO" >> mk/build.mk
   echo "GhcWithInterpreter = NO" >> mk/build.mk
   #echo "WhatGccIsCalled = /bin/true" >> mk/build.mk

   # we just need to build the compiler...
   cd ghc
   make boot
   cd ..
   
   cd ghc/compiler
   make stage=1
   cd ../..

   mkdir ../b2-unwanted
   mv libraries ../b2-unwanted
   mv hslibs ../b2-unwanted
   ln -s ../b1/libraries .
   ln -s ../b1/hslibs .
   make hc-file-bundle Project=Ghc
  cd ..

  touch b2-stamp
fi