fix DUSEMMAP

GNUmakefile.llvm

@@ -288,13 +288,13 @@ ifeq "$(shell echo '$(HASH)include <sys/ipc.h>@$(HASH)include <sys/shm.h>@int ma
         SHMAT_OK=1
 else
         SHMAT_OK=0
-        #CFLAGS+=-DUSEMMAP=1
+        CFLAGS_SAFE+=-DUSEMMAP=1
         LDFLAGS += -Wno-deprecated-declarations
 endif
 
 ifeq "$(TEST_MMAP)" "1"
         SHMAT_OK=0
-        CFLAGS+=-DUSEMMAP=1
+        CFLAGS_SAFE+=-DUSEMMAP=1
         LDFLAGS += -Wno-deprecated-declarations
 endif