编译内核驱动模块的时候错误解决方案
makefile：ifeq ($(KERNELRELEASE),)KERNELDIR ?= /home/sfe1012/GSRD/linux-socfpga-socfpga-3.12/PWD := $(shell pwd)modules: $(MAKE) -C $(KERNELDIR) M=$(PWD) modulesmodules_install: $(MAKE) -C
