diff --git a/Makefile b/Makefile
index f848e2a..2a3e8c3 100755
--- a/Makefile
+++ b/Makefile
@@ -15,8 +15,12 @@ EXTRA_CFLAGS += -Wno-unused-function
 EXTRA_CFLAGS += -Wno-unused
 EXTRA_CFLAGS += -Wno-date-time
 EXTRA_CFLAGS += -Wno-misleading-indentation
-EXTRA_CFLAGS += -Wno-uninitialized
-EXTRA_CFLAGS += -Wno-error=date-time	# Fix compile error on gcc 4.9 and later
+#EXTRA_CFLAGS += -Wno-uninitialized
+
+GCC_VER_49 := $(shell echo `$(CC) -dumpversion | cut -f1-2 -d.` \>= 4.9 | bc )
+ifeq ($(GCC_VER_49),1)
+EXTRA_CFLAGS += -Wno-date-time	# Fix compile error && warning on gcc 4.9 and later
+endif
 
 EXTRA_CFLAGS += -I$(src)/include
 EXTRA_CFLAGS += -I$(src)/hal/phydm
@@ -1866,7 +1870,7 @@ export CONFIG_RTL8812AU = m
 all: modules
 
 modules:
-	$(MAKE) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) -C $(KSRC) M=$(shell pwd)  modules
+	$(MAKE) -j $(shell nproc || echo 1) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) -C $(KSRC) M=$(shell pwd)  modules
 
 strip:
 	$(CROSS_COMPILE)strip $(MODULE_NAME).ko --strip-unneeded