Comments on: How to: Compile Linux kernel modules

By: Kesava

Kesava — Mon, 14 Nov 2011 06:15:08 +0000

Hi,
when I try to do the same with the different code; getting the following error. Any Help is really appreciated.

> make
make -C /lib/modules/2.6.25.5-1.1-default/build SUBDIRS=/home/vmware1/netp15 modules
make[1]: Entering directory `/usr/src/linux-2.6.25.5-1.1-obj/x86_64/default’
make[1]: *** No rule to make target `modules’. Stop.
make[1]: Leaving directory `/usr/src/linux-2.6.25.5-1.1-obj/x86_64/default’
make: *** [all] Error 2

-Thnx,
VKS.

By: Debian user

Debian user — Fri, 11 Nov 2011 01:13:33 +0000

Debian Squeeze 2.6.32-5-amd64

It worked right away!

Thank you. ^^

– screen dump –
Module Size Used by
hello 786 0
powernow_k8 10978 1
cpufreq_stats 2740 0
cpufreq_conservative 5162 0
cpufreq_userspace 1992 0
parport_pc 18855 0
cpufreq_powersave 902 0
ppdev 5030 0

By: Suneel

Suneel — Sat, 29 Oct 2011 07:44:26 +0000

How did you fix this problem Prashanth? I’m getting exactly same error make[1]: *** No rule to make target `−C’. Stop. Please help me if you have some info on this.

By: Iranist

Iranist — Thu, 22 Sep 2011 19:29:11 +0000

It was so useful, thanks!

By: alexpally

alexpally — Sun, 10 Apr 2011 16:48:41 +0000

You must use TABs instead of spaces in make file

By: touristguy87

touristguy87 — Tue, 01 Mar 2011 15:18:36 +0000

If you’re really having trouble getting this to fly, then I would suggest reading this:
http://www.gnu.org/software/make/manual/make.html#Overview
The full documentation on gnu make
probably will help a lot.
and as always
start with something that works and make minimal changes between verifications
something as small as a simple tab where the make utility expects spaces or vice-versa
will definitely keep it from working. Not to mention an out-of-date install or an install that needs a reboot.

By: touristguy87

touristguy87 — Mon, 14 Feb 2011 02:09:22 +0000

also remember that there is a difference between ‘ and `
just as between space and tab
so if you see one don’t use the other

By: touristguy87

touristguy87 — Mon, 14 Feb 2011 02:08:07 +0000

um, obviously one part of the problem here is the fact that depending on what editor you use, what exactly the offsets are between different sections of the relevant files and whether you use spaces or tabs, you will get different results.

that’s on top of exactly what version of Linux you’re running, and what version of the relevant libraries.

Trust me on this. Start with a working example, one that you simply download and run, with no edits. If you don’t have one find one on the internet somewhere. The most that you can pick up from a guide like this are just guidelines for what should work. Doesn’t mean that it will work for you on your system, the way that you’ve configured it or edited the file.
When it should work and it does not? odds are that you are about to learn something new about Linux.
good luck

By: s singh

s singh — Mon, 07 Feb 2011 15:26:55 +0000

i am getting the following error after executing make
make: Nothing to be done for `all’.

By: s singh

s singh — Mon, 07 Feb 2011 14:27:22 +0000

i am getting the same error and replacing spaces with tab is not working.
some other solution..??

By: Rigved Rakshit

Rigved Rakshit — Fri, 04 Feb 2011 14:36:45 +0000

The line:

obj-m = foo.o

is wrong. It should be:

obj-m += foo.o

By: Romy

Romy — Fri, 28 Jan 2011 18:12:53 +0000

Really Thankful…..A great note for Beginners

By: Anjan

Anjan — Thu, 13 Jan 2011 08:09:17 +0000

try looking for messages in dmesg i.e., after #insmod hello.ko
try #dmesg
u will be able to see the messages

By: Prabhu

Prabhu — Wed, 08 Dec 2010 10:44:36 +0000

Cool article. My first module programming is running successfully. Thanks a lot.
- Prabhu

By: SIFE

SIFE — Wed, 01 Dec 2010 08:48:32 +0000

I have trouble with my custom kernel for the last tow days, it does not boot due ahci module, can I compile it as module and then make initrd image or I have to add it to kernel configuration, if so where I have to activate it, I tried to go to:
Device drivers-> Serial ATA Drivers and Parelle ATA Drivers-> AHCI SATA Support
But it seems does not compile it according to this message when I install modules:
WARNING: No module ahci found for kernel 2.6.37-rc4, continuing anyway

By: SIFE

SIFE — Wed, 01 Dec 2010 08:47:07 +0000

I have trouble with my custom kernel for the last tow days, it does not boot due [b]ahci[/b] module, can I compile it as module and then make initrd image or I have to add it to kernel configuration, if so where I have to activate it, I tried to go to:
Device drivers-> Serial ATA Drivers and Parelle ATA Drivers-> AHCI SATA Support
But it seems does not compile it according to this message when I install modules:
[code]
WARNING: No module ahci found for kernel 2.6.37-rc4, continuing anyway
[/code]

By: Prashant

Prashant — Sun, 21 Nov 2010 17:00:36 +0000

I made a hello-1.c and Makefile in the same directory.
when is issue “make” command, it gives error:
make −C /lib/modules/2.6.32-25-generic/build M=/home/prashant modules
make[1]: Entering directory `/home/prashant’
make[1]: *** No rule to make target `−C’. Stop.
make[1]: Leaving directory `/home/prashant’
make: *** [all] Error 2

I am getting this error from so long. I even changed my working directory to root.

By: PAgore

PAgore — Fri, 19 Nov 2010 09:51:52 +0000

Cool! :-)
I compiled my first module in Linux.

Thanks for your instructions!!!

By: Lucas

Lucas — Thu, 18 Nov 2010 18:05:37 +0000

hello,
my system is ubuntu 10.04 kernel 2.6.32-25-generic, i did everything as described in article and.. when i do(as root: sudo -i ):
# insmod hello.ko
i get answer :
# insmod: error inserting ‘hello.ko’: -1 Invalid module format

And I’ve no idea what can be wrong.. or what I do wrong… would be gratefull for help

By: touristguy87

touristguy87 — Sat, 21 Aug 2010 06:26:00 +0000

START WITH THE EXAMPLE, WHICH HAS BEEN DEBUGGED & TESTED FOR YOU.
If you cannot get that to work that is one thing.
If you can get THAT to work but you cannot get YOUR code to work then
for chrissakes
figure out what you have done different that doesn’t work and fix it l!!!!