Question

I am trying to compile a Hello World module. I am having a fresh Ubuntu in my system which doesn’t have any compiled kernel.

My kernel is:

2.6.32-34-generic

I gave the following Makefile and got the error:

obj-m += hello-1.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

# make
make -C /lib/modules/2.6.32-34-generic/build M=/home/james/Desktop/hello modules
make[1]: Entering directory `/usr/src/linux-headers-2.6.32-34-generic'
make[2]: *** No rule to make target `/home/james/Desktop/hello/hello-1.c', needed by `/home/james/Desktop/hello/hello-1.o'.  Stop.
make[1]: *** [_module_/home/james/Desktop/hello] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-2.6.32-34-generic'
make: *** [all] Error 2

The contents of my /lib/modules/2.6.32-34-generic are

total 3864
lrwxrwxrwx  1 root root     40 2011-11-05 15:55 build -> /usr/src/linux-headers-2.6.32-34-generic
drwxr-xr-x  2 root root   4096 2011-11-05 15:49 initrd
drwxr-xr-x 10 root root   4096 2011-11-05 15:49 kernel
.......................................................
.......................................................

The folder /usr/src/linux-headers-2.6.32-34-generic exists.

Since it didnt work, I downloaded the linux-headers-2.6.32-34-generic source from Ubuntu and compiled and changed my Makefile to:

obj-m += hello-1.o
all:
    make -C /usr/src/linux-2.6.32/ M=$(PWD) modules

clean:
    make -C /usr/src/linux-2.6.32/ M=$(PWD) clean

#make
make -C /usr/src/linux-2.6.32/ M=/home/james/Desktop/hello modules
make[1]: Entering directory `/usr/src/linux-2.6.32'

  ERROR: Kernel configuration is invalid.
         include/linux/autoconf.h or include/config/auto.conf are missing.
         Run 'make oldconfig && make prepare' on kernel src to fix it.


  WARNING: Symbol version dump /usr/src/linux-2.6.32/Module.symvers
           is missing; modules will have no dependencies and modversions.

make[2]: *** No rule to make target `/home/james/Desktop/hello/hello-1.c', needed by `/home/james/Desktop/hello/hello-1.o'.  Stop.
make[1]: *** [_module_/home/james/Desktop/hello] Error 2
make[1]: Leaving directory `/usr/src/linux-2.6.32'
make: *** [all] Error 2

Could someone help me solving this.http://packages.ubuntu.com/lucid-updates/devel/linux-headers-2.6.32-34-generic

I have some general questions to ask.

After a fresh install what is the best way of compiling a kernel. After I compiled the kernel and built a module it worked flawlessly earlier. But I couldnt know what to do this in this situation

Answer 1

make[2]: * No rule to make target
/home/james/Desktop/hello/hello-1.c', needed by/home/james/Desktop/hello/hello-1.o’. Stop

Your are facing this error in the first compilation because hello-1.c file is missing in /home/james/Desktop/hello/ directory.