make 报错 *** recipe commences before first target. Stop.

背景

学习linux设备驱动,写第一个hello world程序,make报错:

eden@ubuntu:~/Documents/Project/scull/hello_world$ make
Makefile:17: *** recipe commences before first target.  Stop.

原因

最后查明原因是我的target多了tab

Makefile的rule基本是这样的

targets: prerequisites

        command

        command

        command

targets前不能有tab键

command要使用tab键开始

我错误的写法是:

        ifneq ($(KERNELRELEASE),)

            hello-objs := hello.o

            obj-m := hello.o

        else

            KERNELDIR ?= /lib/modules/$(shell uname -r)/build

            PWD := $(shell pwd)

        modules:

            $(MAKE) -C $(KERNELDIR) M=$(PWD) modules

        endif

  改为:

ifneq ($(KERNELRELEASE),)

    hello-objs := hello.o

    obj-m := hello.o

else

    KERNELDIR ?= /lib/modules/$(shell uname -r)/build

    PWD := $(shell pwd)

modules:

    $(MAKE) -C $(KERNELDIR) M=$(PWD) modules

endif

问题解决

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转载自blog.csdn.net/MashiMaroJ/article/details/128364356