#!/bin/sh

# Terminate when a command is unsuccesful
set -e

cd "$(dirname "$0")"

##
# Function that provides make-like behaviour for executed commands. It prints
# the commandline used to execute them before execution.
##
execute()
{
	local r

	echo "$@"
	"$@"
}

# Some default configuration settings
HOST_TRIPLET=i586-mingw32msvc
INSTALLER_VERSION="2.2.0.999"
DEBUGFLAG="--disable-debug"
CC_FOR_BUILD="gcc"
CXX_FOR_BUILD="g++"
CFLAGS="-gstabs -g3"
CXXFLAGS="-gstabs -g3"
CFLAGS_FOR_BUILD=" "
CXXFLAGS_FOR_BUILD=" "
CPPFLAGS_FOR_BUILD=" "

if [ -f __BUILD_CONFIG.USER ]; then
	. ./__BUILD_CONFIG.USER
fi

for arg in "$@"; do
	case "$arg" in
	*=*) val=`expr "X$arg" : '[^=]*=\(.*\)'` ;;
	*)   val=yes ;;
	esac

	case "$arg" in
	--enable-debug* | --disable-debug)
		unset DEBUGFLAG
		;;
	--enable-installer | --enable-installer=yes)
		INSTALLERFLAG="--enable-data --enable-installer --with-installer-extdir=\"$PWD/build/libs\"
			${INSTALLER_VERSION:+--with-installer-version=$INSTALLER_VERSION}"
		;;
	-with-* | --with-* | -enable-* | --enable-*)
		;;
	*=*)
		var=`expr "x$arg" : 'x\([^=]*\)='`
		# Reject names that are not valid shell variable names.
		expr "x$var" : ".*[^_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]" >/dev/null && {
			echo "$0: error: invalid variable name: $var" >&2
			exit 1
		}
		eval $var=\$val
		export $var
		;;
	clean | very-clean | preclean | very-preclean)
		execute rm -rf build
		execute make -C libs clean
		expr "$arg" : 'very-' >/dev/null && execute rm -rf downloads
		expr "$arg" : '.*pre' || exit 0
		;;
	*)
		echo "$0: error: unknown command line option: $arg" >&2
		exit 1
		;;
	esac
done

__BOTHFLAGS="-pipe -m32 -march=i686 -O2 -g"
CFLAGS="$__BOTHFLAGS $CFLAGS"
CXXFLAGS="$__BOTHFLAGS $CXXFLAGS"
CPPFLAGS="-I$PWD/build/libs/include $CPPFLAGS"
LDFLAGS="-L$PWD/build/libs/lib $LDFLAGS"
unset __BOTHFLAGS

if [ -z "$PKG_CONFIG_PATH" ] ; then
	PKG_CONFIG_PATH="$PWD/build/libs/lib/pkgconfig"
fi
export PKG_CONFIG_PATH

if [ -f "/proc/cpuinfo" ] ; then
	MAKE_FLAGS=-j$((`grep '^processor' /proc/cpuinfo | wc -l` + 1))
fi

# Make sure we've got a build directory
if [ ! -d build/libs ] ; then
	mkdir -p build/libs
fi

# Echo commands as we execute them
set -x

# Make sure that the dependencies have been built
make $MAKE_FLAGS -C libs "HOST_TRIPLET=$HOST_TRIPLET"

cd build

[ -x ../../configure ] || ../../autogen.sh
../../configure "$@" \
	"--host=$HOST_TRIPLET" --enable-static --disable-shared ${DEBUGFLAG:+$DEBUGFLAG} \
	${INSTALLERFLAG:+$INSTALLERFLAG} \
	CFLAGS="$CFLAGS" \
	CXXFLAGS="$CXXFLAGS" \
	CPPFLAGS="$CPPFLAGS" \
	LDFLAGS="$LDFLAGS" \
	CC_FOR_BUILD="$CC_FOR_BUILD" \
	CXX_FOR_BUILD="$CXX_FOR_BUILD" \
	CFLAGS_FOR_BUILD="$CFLAGS_FOR_BUILD" \
	CXXFLAGS_FOR_BUILD="$CXXFLAGS_FOR_BUILD" \
	CPPFLAGS_FOR_BUILD="$CPPFLAGS_FOR_BUILD" \
	PKGCONFIG_DEFAULT_PREFIX=${PKGCONFIG_DEFAULT_PREFIX:-$PWD/build/libs} \
	${PKG_CONFIG_PATH:+PKG_CONFIG_PATH=$PKG_CONFIG_PATH}
make $MAKE_FLAGS