+
+# Check whether --enable-error-on-warning or --disable-error-on-warning was given.
+if test "${enable_error_on_warning+set}" = set; then
+ enableval="$enable_error_on_warning"
+ case "${enableval}" in
+ yes | y) ERROR_ON_WARNING="yes" ;;
+ no | n) ERROR_ON_WARNING="no" ;;
+ *) { echo "configure: error: bad value ${enableval} for --enable-error-on-warning" 1>&2; exit 1; } ;;
+ esac
+fi
+
+
+# Enable -Werror by default, suppressing it only for --disable-error-on-warning
+# or --disable-build-warnings.
+if test "${ERROR_ON_WARNING}" != no
+then
+ build_warnings="$build_warnings -Werror"
+fi
+