+ghc_stage1_CONFIGURE_OPTS += --flags=stage1
+ghc_stage2_CONFIGURE_OPTS += --flags=stage2
+ghc_stage3_CONFIGURE_OPTS += --flags=stage3
+
+ifeq "$(GhcWithInterpreter)" "YES"
+ghc_stage2_CONFIGURE_OPTS += --flags=ghci
+ghc_stage3_CONFIGURE_OPTS += --flags=ghci
+endif
+