kernel headers

[rakeshkumar]

hello
am using fedora 12 . i have installed kernel-devel package but still the kernel headers are not available at /lib/moudles/2.6.31.***/build:

my driver gives compilation error
/lib/moudles/2.6.31.***/build: no directory or file
make error

[scathefire]

rpm -q kernel-devel

rpm -q kernel

rpm -q kernel-headers

there is a separate package called kernel-headers. Make sure you are installing the ones that are for the kernel you are going to be loading.

[rakeshkumar]

[root@localhost modules]# rpm -q kernel-devel
kernel-devel-2.6.31.12-174.2.3.fc12.x86_64

[root@localhost modules]# rpm -q kernel
kernel-2.6.31.5-127.fc12.x86_64

[root@localhost modules]# rpm -q kernel-headers
kernel-headers-2.6.31.12-174.2.3.fc12.x86_64

my Makefile is

obj-m :=vram.o
obj-m +=vramm.o
KDIR= /lib/modules/$(shell uname -r)/build
all:
$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
clean:
rm -rf *.o *.ko *.mod.* .c* .t*

i worked the same code in debian it works fine after kernel headers installation but facing problem here

/lib/modules/2.6.31.5-127.fc12.x86_64/build: No such file or directory. Stop.

[gerard4143]

[root@localhost modules]# rpm -q kernel-devel
kernel-devel-2.6.31.12-174.2.3.fc12.x86_64

[root@localhost modules]# rpm -q kernel
kernel-2.6.31.5-127.fc12.x86_64

[root@localhost modules]# rpm -q kernel-headers
kernel-headers-2.6.31.12-174.2.3.fc12.x86_64

my Makefile is

obj-m :=vram.o
obj-m +=vramm.o
KDIR= /lib/modules/$(shell uname -r)/build
all:
$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
clean:
rm -rf *.o *.ko *.mod.* .c* .t*

i worked the same code in debian it works fine after kernel headers installation but facing problem here

/lib/modules/2.6.31.5-127.fc12.x86_64/build: No such file or directory. Stop.

Try executing uname -r in the terminal...What did you get? I'm betting it was "2.6.31.5-127.fc12.x86_64"...You may have to write your kernel devel version in by hand.

instead of this:

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

replace $(shell uname -r) with your devel version

If your unsure check the in folder /lib/modules/...What does it contain?

[bloggins666]

I've seen where there is no build directory but it is really just a link to the "kernel" directory. Have a look and either put in the symbolic link or modify your makefile by changing the reference to "build" to "kernel".

Cheers!!

[jayd512]

Your kernel and kernel-headers have a slight difference...
Might I suggest: yum install <each of these>:

yum update
kernel-devel
kernel-headers
gcc
make

After that, you should be able to proceed with your task.