#!/bin/sh -e

# Manuel M. T. Chakravarty <chak@acm.org>, June 2000
# Updated for GHC 5.00, Simon Marlow, March 2001
#
# Script to build GHC from .hc files (must be run in the fptools/ root
# directory into which the source and .hc files must already have been
# unpacked).  All options are passed through to ./configure (especially
# useful with --prefix).

configopts="$*"         # e.g., --enable-hc-boot-unregisterised

# check for GNU make
#
MAKENAMES="gmake make no-make"
for make in $MAKENAMES; do
  MAKE=$make
  $make --version 2>&1 | grep "GNU Make" >/dev/null && break
done
if [ $MAKE = no-make ]; then
  echo "Fatal error: Cannot find the GNU make utility"
  exit 1
fi

# build configuration
#
cat >mk/build.mk <<END
# nothing!
END

# touch happy generated files; so that in non-bootstrapping mode for
# installation, no attempt is made to call happy
#
touch ghc/compiler/rename/ParseIface.hs
touch ghc/compiler/parser/Parser.hs
touch ghc/compiler/main/ParsePkgConf.hs

echo "*** Building hsc..."
./configure --enable-hc-boot $configopts
$MAKE -C glafp-utils boot all
$MAKE -C ghc boot
$MAKE -C hslibs boot all
$MAKE -C ghc all

echo "*** Building libraries..."

# Reconfigure, using the newly-build ghc binary as our $(GHC), and
# with hc bootstrapping disabled.
HappyCmd="$PWD/distrib/fake-happy" ./configure --with-ghc="$PWD/ghc/compiler/ghc-inplace"

PRIMOP_BITS=primop-data-decl.hs-incl \
            primop-tag.hs-incl  \
            primop-list.hs-incl  \
            primop-has-side-effects.hs-incl  \
            primop-out-of-line.hs-incl  \
            primop-commutable.hs-incl  \
            primop-needs-wrapper.hs-incl  \
            primop-can-fail.hs-incl  \
            primop-strictness.hs-incl  \
            primop-usage.hs-incl  \
            primop-primop-info.hs-incl

# The reconfigure step updates a few files, which can lead to
# unnecessary recompilations.  Touch a bunch of things here to avoid
# having to recompile stuff that we've already built.
(cd ghc/compiler; touch $PRIMOP_BITS prelude/PrimOp.o main/Config.{hs,o} ghc-*)

# Remove the old libraries.  Don't use make clean, because we don't
# want to delete the .hs files generated from the .hsc files, because
# we don't have hsc2hs built yet.
/usr/bin/find ghc/lib/std hslibs | grep '\.\(o\|a\)' | /usr/bin/xargs rm -f

# Do includes and RTS now
$MAKE -C ghc/includes boot && $MAKE -C ghc/includes all
$MAKE -C ghc/rts      boot && $MAKE -C ghc/rts      all

# Now build a new set of libraries
$MAKE -C ghc/lib boot all
$MAKE -C hslibs  boot all

# Finally build ghc/utils, now that we have libraries
$MAKE -C ghc/utils boot all

# At this point, the tree should be safe to do 'make install' in.

