build.sh: switch to "getopt" command and handle "--disable-threads" and "--force-ansi" long options.

build.sh

@@ -4,24 +4,41 @@ mkdir build 2> /dev/null
 pushd build > /dev/null
 
 function usage() {
-	echo "Usage: ${0##*/} [ -h ] [ -t Debug|Release|RelWithDebInfo|MinSizeRel ]"
+	echo "Usage: ${0##*/} [ -h ] [ -t Debug|Release|RelWithDebInfo|MinSizeRel ] [ --disable-threads ] [ --force-ansi ]"
 	exit 1
 }
 
-ARGS=""
-while getopts ":h?t:" opt; do
+options=$(getopt -n "${0##*/}" -o ht: --long disable-threads --long force-ansi -- "$@")
 
-	case "${opt}" in
-		t) 	ARGS="${ARGS} -DCMAKE_BUILD_TYPE=${OPTARG}" ;;
-		h)  usage ;;
-		:) 	echo "Error: -${OPTARG} requires a value"
-			exit 1
+[ $? -eq 0 ] || usage
+
+eval set -- "$options"
+
+ARGS=""
+while true; do
+
+	case "${1}" in
+		-t)
+			shift
+			[[ ! "$1" =~ ^(Debug|Release|RelWithDebInfo|MinSizeRel)$ ]] && {
+	            echo "Incorrect type '$1' provided"
+	            usage
+	        }
+			ARGS="${ARGS} -DCMAKE_BUILD_TYPE=${1}"
+			;;
+		--disable-threads)
+			ARGS="${ARGS} -DUSE_THREADS=OFF" ;;
+		--force-ansi)
+			ARGS="${ARGS} -DFORCE_ANSI=ON" ;;
+		-h) usage ;;
+		--) shift
+			break
 			;;
 	esac
+	shift
 done
-shift $((OPTIND-1))
 
-cmake $ARGS $@ ..
+echo cmake $ARGS ..
 make -B
 
 popd > /dev/null