Merge branch 'abort-on-unknown-meson-option' into 'master'

[tools/prepare-build-dir] fail if unknown meson option is set

See merge request i4/manycore/emper!257

tools/prepare-build-dir

@@ -100,6 +100,7 @@ if ! $QUIET; then
 fi
 
 meson --buildtype=${BUILDTYPE} \
+	--fatal-meson-warnings \
 	 ${MESON_ARGS[@]} \
 	 "${ABSOLUTE_BUILDDIR}" |\
 	tee "${LOGFILE}"