--- Libc/Libc-167/Makefile.postamble
+++ Libc/Libc-186/Makefile.postamble
@@ -5,6 +5,7 @@
 PRODUCTS += $(LIBRARY_PREFIX)$(NAME)$(PROFILE_SUFFIX)$(LIBRARY_EXT)
 PRODUCTS += $(LIBRARY_PREFIX)$(NAME)$(STATIC_SUFFIX)$(LIBRARY_EXT)
 RECURSIVE_FLAGS += "LINK_SUBPROJECTS = NO"
+OTHER_CFLAGS += -no-cpp-precomp -force_cpusubtype_ALL
 
 static:
 	$(SILENT) unset $(CUMULATIVE_VARIABLES) ||: ; \