My makefile results in: No rule to make target `arch/x86/tools/relocs.c', needed

Question

I am using Ubuntu 12.04. I wrote a simple hello world kernel module (hello.c). I wrote the folllowing makefile for it:

obj-m+=hello.o
KDIR:= /usr/src/linux-headers-3.2.0-24-generic-pae
all:
     $(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
clean:
     rm -rf *.o *.ko *.mod.* *.symvers *.order

But this error cropped up when I did make from kernel:

make[1]: Entering directory `/usr/src/linux-headers-3.2.0-24-generic-pae'
make[2]: *** No rule to make target `arch/x86/tools/relocs.c', needed
by `arch/x86/tools/relocs'.  Stop.

hello.c and makefile are in /Documents/module_prog. I ran make from that directory.

What is causing this error and how can I fix it?

score 13 · Answer 1 · edited Mar 23 '13 at 21:30

13

In the make file, just change SUBDIRS=$(PWD) into M=$(shell pwd)...

Works like charm

edited Mar 23 '13 at 21:30

Seth

58,122

answered Mar 12 '13 at 10:39

jero2rome

231

1

SUBDIRS=$(PWD) does not exist in my make file – Salem F Jan 03 '21 at 14:23

score 4 · Answer 2 · edited Apr 27 '21 at 09:50

4

i386 headers required:

sudo apt-get install linux-headers-$(uname -r | sed 's/\(.*\)-[a-z]*/\1/'):i386

Example:

sudo apt-get install linux-headers-5.4.0-42:i386

edited Apr 27 '21 at 09:50

Nick Vee

103

answered Aug 30 '20 at 00:18

Thantelius

61

3

Why all the downvotes? Someone help me out here please to understand what the problem is with this answer. – Gabriel Staples Sep 28 '20 at 08:20
This actually solved my issue. I do not understand why people downvoted this – If_You_Say_So Dec 06 '20 at 21:26
1

Find your kernel version with uname -r, cut out the "-generic" part. – ki9 Feb 24 '21 at 02:21
1

Well simply because it doesn't work: Unable to locate package linux-headers-5.4.0-81-generic:i386 – Eric Aug 18 '21 at 19:31
1

Try linux-headers-5.4.0-81:i386 instead. Works here. – Adam Oct 18 '21 at 19:51

score 0 · Answer 3 · answered Sep 14 '21 at 10:05

to get headers files for your particular kernel... you may have more success with a slightly less clever version of @Thantelius answer:

apt search linux-headers-$(uname -r)
apt install <package name showing in the search>

however in most recent/major distros, headers should be installed by default

score 0 · Answer 4 · answered Oct 02 '21 at 02:36

0

After a long time with this problem, my solution was to rename the makefile from makefile to Makefile.

answered Oct 02 '21 at 02:36

Albi

1

It shouldn't make a difference, see this answer to Should I name "makefile" or "Makefile"?: By default, when make looks for the makefile, it tries the following names, in order: GNUmakefile, makefile and Makefile. – Greenonline Oct 02 '21 at 06:15
I tested both multiple times. It indeed only works with ‘Makefile’. – Albi Oct 02 '21 at 06:20

My makefile results in: No rule to make target `arch/x86/tools/relocs.c', needed

4 Answers4

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