+ifneq "$$(ICONV_INCLUDE_DIRS)" ""
+$1_$2_CONFIGURE_OPTS += --configure-option=--with-iconv-includes="$$(ICONV_INCLUDE_DIRS)"
+endif
+
+ifneq "$$(ICONV_LIB_DIRS)" ""
+$1_$2_CONFIGURE_OPTS += --configure-option=--with-iconv-libraries="$$(ICONV_LIB_DIRS)"
+endif
+