Reading Makefile.rules i found some unclear places in file: Line 553: LinkMOdule += -Xlinker -internalize-public-api-file=$(EXPORTED_SYMBOL_FILE) Maybe it must be LinkModule += ... ? Line 1283: DistCheckDir := $(LLVM_OBJ_ROOT)/_distcheckdir Maybe it must be: DistCheckDir := $(PROJ_OBJ_ROOT)/_distcheckdir Vladimir