#!/bin/sh

# File names look like this:
#
# qemu-2.11.0.tar.xz

DESTINATION_DIRECTORY="/Users/Shared"

COMPONENT_LIST="qemu:QEMU"
COMPONENT_LIST="$COMPONENT_LIST libffi:LIBFFI"
COMPONENT_LIST="$COMPONENT_LIST gettext:GETTEXT"
COMPONENT_LIST="$COMPONENT_LIST glib:GLIB"
COMPONENT_LIST="$COMPONENT_LIST pixman:PIXMAN"
COMPONENT_LIST="$COMPONENT_LIST pkg-config:PKGCONFIG"

#export CC="/Users/Shared/gcc/bin/gcc"
#export CPP="/Users/Shared/gcc/bin/cpp"
#export CXX="/Users/Shared/gcc/bin/g++"
#export PATH="/Users/Shared/gcc/bin:$PATH"

# ---------------------------------------------
# Make the script directory our build directory
# ---------------------------------------------
cd "`dirname "$0"`" || exit 1

# -------------------------------------------
# Create a temporary directory for work files
# -------------------------------------------
TEMPDIR="`mktemp -d`" || exit 1
trap "rm -fr $TEMPDIR" exit

# $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
# Loop through each of the component source tar files,
# extract the actual version and compression type from
# the file in the present directory, and store the
# details in environment variables
# $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
for c in $COMPONENT_LIST; do

	# --------------------------------------
	# Isolate the package base name and the
	# prefix which we'll use for environment
	# variables
	# --------------------------------------
	echo "1: $c"
	PKGNAME=`echo "$c" | cut -f1 -d:`
	PKGPREFIX=`echo "$c" | cut -f2 -d:`
	echo "2: $PKGNAME -> $PKGPREFIX"

	# ------------------------------------------
	# Find the file for this package and extract
	# the wanted details from the file name
	# ------------------------------------------
	ls -1 $PKGNAME-[0-9]*.tar.*z > $TEMPDIR/pkglist || exit 1
	pkgcount=`wc -l $TEMPDIR/pkglist` || exit 1
	pkgcount=`echo $pkgcount | sed -e 's/^  *//' -e 's/ .*$//'`
	if [ $pkgcount -ne 1 ]; then
		echo "Need ONE (only) $PKGNAME source tar file" >&2
		exit 1
	fi
	pkgfile=`head -n1 $TEMPDIR/pkglist`
	compression=`echo $pkgfile | sed -e 's/^.*\.//'`
	version=`echo $pkgfile | sed -e "s/^$PKGNAME-//" -e 's/.tar.*$//'`
	echo "3: /$compression/ <$version>"
	if [ "a$compression" = "a" -o "a$version" = "a" ]; then
		echo "Problem parsing file name: $pkgfile" >&2
		exit 1
	fi

	# ------------------------------------
	# Store the details in the environment
	# ------------------------------------
	declare -x ${PKGPREFIX}_COMPRESSION="$compression"
	declare -x ${PKGPREFIX}_FILE="$pkgfile"
	declare -x ${PKGPREFIX}_VERSION="$version"
done

# --------------------------------------------
# Determine where everything will be installed
# --------------------------------------------
installdir="$DESTINATION_DIRECTORY/qemu-$QEMU_VERSION"

# =========================
# Build and assemble it all
# =========================

rm -fr libffi-$LIBFFI_VERSION
tar --$LIBFFI_COMPRESSION -xf $LIBFFI_FILE					|| exit 1
pushd libffi-$LIBFFI_VERSION							|| exit 1
./configure --prefix="$installdir"						|| exit 1
make										|| exit 1
make install									|| exit 1
popd										|| exit 1

rm -fr gettext-$GETTEXT_VERSION
tar --$GETTEXT_COMPRESSION -xf $GETTEXT_FILE					|| exit 1
pushd gettext-$GETTEXT_VERSION							|| exit 1
./configure --prefix="$installdir"						|| exit 1
make										|| exit 1
make install									|| exit 1
popd										|| exit 1

rm -fr glib-$GLIB_VERSION
tar --$GLIB_COMPRESSION -xf $GLIB_FILE						|| exit 1
pushd glib-$GLIB_VERSION							|| exit 1
LIBFFI_CFLAGS="-I$installdir/lib/libffi-$LIBFFI_VERSION/include"		\
LIBFFI_LIBS="-L$installdir/lib"							\
CFLAGS="-I$installdir/include"							\
CPPFLAGS="-I$installdir/include"						\
LIBS="-L$installdir/lib"							\
PATH="$PATH:$installdir/bin"							\
./configure --prefix="$installdir" --with-pcre=internal				|| exit 1
make										|| exit 1
make install									|| exit 1
popd

rm -fr pkg-config-$PKGCONFIG_VERSION
tar --$PKGCONFIG_COMPRESSION -xf $PKGCONFIG_FILE				|| exit 1
pushd pkg-config-$PKGCONFIG_VERSION						|| exit 1
./configure --prefix="$installdir" --with-internal-glib				|| exit 1
make										|| exit 1
make install									|| exit 1
popd										|| exit 1

rm -fr pixman-$PIXMAN_VERSION
tar --$PIXMAN_COMPRESSION -xf $PIXMAN_FILE					|| exit 1
pushd pixman-$PIXMAN_VERSION							|| exit 1
# clang doesn't have the full set of GCC vector ops/functions so we need to break the vector-support test in "configure"
CPPFLAGS="-Dvector_size=broken_vector" ./configure --prefix="$installdir"	|| exit 1
make										|| exit 1
make install									|| exit 1
popd										|| exit 1

rm -fr qemu-$QEMU_VERSION
tar --$QEMU_COMPRESSION -xf $QEMU_FILE						|| exit 1
pushd qemu-$QEMU_VERSION							|| exit 1
PATH=$PATH:"$installdir/bin"							\
./configure									\
	--prefix="$installdir"							\
	--audio-drv-list=""							\
	--target-list="i386-softmmu,x86_64-softmmu,arm-softmmu,aarch64-softmmu"
make										|| exit 1
make install									|| exit 1
make install-doc								|| exit 1
popd										|| exit 1