+ifneq "$$(GMP_INCLUDE_DIRS)" ""
+$1_$2_CONFIGURE_OPTS += --configure-option=--with-gmp-includes="$$(GMP_INCLUDE_DIRS)"
+endif
+
+ifneq "$$(GMP_LIB_DIRS)" ""
+$1_$2_CONFIGURE_OPTS += --configure-option=--with-gmp-libraries="$$(GMP_LIB_DIRS)"
+endif
+