Building drivers without source on BBB

[Raul Piper]

HI, 

I am using this Makefile to build the kernel driver on the BBB itself(already apt-get installed build-essenatials on it).

obj-m += myDrvr.o

all:

make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean:

make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

But I am getting this error : 

make -C /lib/modules/4.1.22-bone21/build M=/home/ubuntu/bb/exploringBB/chp06/GPIO/tests/hello-linux-module modules

Makefile:4: recipe for target 'all' failed

I checked that inside ls -l /lib/modules/  there is 4.1.22-bone21 folder is present which is symbolically linked with the build pointing to /path_to_kernel_sources_on_pc_WHERE_I_BUILT_MY_KERNEL

Is this some error I did while building the image for BBB.How can I compile my kernel module?

Thanks and Rgds,

Rp

[ZeekHuge]

Hi Raul Piper,

You should probably not worry about the /lib/modules/4.1.22-bone21/ files.

But there might be a problem in your Makefile. You should try adding 'all' and 'clean' as PHONY targets in your makefile.
You can see this Makefile for reference : https://github.com/ZeekHuge/BeagleScope/blob/port_to_4.4.12-ti-r31%2B/examples/kernel_examples/n-blinky/module/Makefile

Good Luck

[Raul Piper]

No It did not work.I just replaced the name of my module in your
example Makefile .Did you follow any pre-steps before this?
Rp

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