unable to compile kernel module

[ric96]

i just wanted to compile a simple hello-world kernel module but it ends up in the following error.

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pi:helloworld $ sudo make
make -C /lib/modules/4.4.13-v7+/build M= modules
make[1]: Entering directory '/usr/src/linux-headers-4.4.13-v7+'
  CHK     include/config/kernel.release
  CHK     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
make[2]: *** No rule to make target 'arch/arm/tools/gen-mach-types', needed by 'include/generated/mach-types.h'.  Stop.
arch/arm/Makefile:315: recipe for target 'archprepare' failed
make[1]: *** [archprepare] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.4.13-v7+'
Makefile:4: recipe for target 'all' failed
make: *** [all] Error 2
pi:helloworld $ 

[ShiftPlusOne]

A bit more information would be good. Where did you get the headers from? What kernel package do you have installed? What does uname -a say? Can you post your example? Why are you running 'make' as root?

[MartyMacGyver]

As a followup, those headers are probably from the "raspberrypi-kernel-headers" package:
raspberrypi-kernel-headers (1.20160620-1 Raspberry Pi Foundation:stable [armhf])
which currently populates the /usr/src/linux-headers-4.4.13-v7+ tree.

I learned today that this exists even though it's rather old versus current kernels being installed by rpi-update - handy, but only if you're using that particular kernel it seems. I'm glad to see kernel headers finally being distributed, but I'm not sure why they lag the actual kernel releases, given that these headers are artifacts of the very same build.

(ShiftPlusOne - I see that we spoke a long while back about the kernel header problem - might I presume the presence of these headers now is part of the effort? Again, glad to see them, but not sure why they're not current (or how to get the current ones that align with the kernel rpi-update provides))

[ShiftPlusOne]

As a followup, those headers are probably from the "raspberrypi-kernel-headers" package:
raspberrypi-kernel-headers (1.20160620-1 Raspberry Pi Foundation:stable [armhf])
which currently populates the /usr/src/linux-headers-4.4.13-v7+ tree.

I learned today that this exists even though it's rather old versus current kernels being installed by rpi-update - handy, but only if you're using that particular kernel it seems. I'm glad to see kernel headers finally being distributed, but I'm not sure why they lag the actual kernel releases, given that these headers are artifacts of the very same build.

(ShiftPlusOne - I see that we spoke a long while back about the kernel header problem - might I presume the presence of these headers now is part of the effort? Again, glad to see them, but not sure why they're not current (or how to get the current ones that align with the kernel rpi-update provides))

The headers are indeed there as a response to community requests. They're intended to match the kernel in the raspberrypi-kernel package, not what's the latest on github. rpi-update is used for testing and is not something most users should be using. If you would like it to install headers, that request would need to be filed here: https://github.com/Hexxeh/rpi-update.

[MartyMacGyver]

The headers are indeed there as a response to community requests. They're intended to match the kernel in the raspberrypi-kernel package, not what's the latest on github. rpi-update is used for testing and is not something most users should be using. If you would like it to install headers, that request would need to be filed here: https://github.com/Hexxeh/rpi-update.

Thanks - good to know!

[MartyMacGyver]

To the original question, if you installed a more recent kernel with rpi-update, see https://github.com/notro/rpi-source/wiki for how to get the corresponding kernel source via the rpi-source script there.

[boeboe]

I finally got around my missing Build Includes to this point:

checking for /lib/modules/4.1.19+/build/include... yes

by downloading the correct version from https://www.niksula.hut.fi/~mhiienka/Rp ... eaders-rpi/
and installing it with:

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sudo dpkg -i linux-headers-4.1.19+_4.1.19+-2_armhf.deb

Thanks to ~mhiienka,
My kernel was updated apparently but no headers to be found anywhere (also

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sudo rpi-update

failed on numerous fronts because it does not expect python3)

Boeboe

[shahab.kalantar]

Hi,

Did you manage to solve your problem? It seems like the experts here don't know exactly what this error means.
I have the same problem on my raspberry pi zero and I'm stuck.
Question is where can we find someone who actually knows what this "gen-mach-types" is and what makefile is responsible for automatically making "mach-types.h".

People just pass you on to this or that forum.