Hi,

I download kernel 2.6.32 ,and I want to add simple system call "hello world" , I followed steps - but while compiling I got these errors:

Make[1]: no rule to make target ('block/hello/sys_hello.o' needed by 'block/hello/built-in.o')
make ** [block/hello/]

Any help is much appreciated!

Thanks,
N.A.S

Can you show us your source code. What programming language are you using?
jdk

This may be helpful to you in decoding the kernel error messages:
http://www.gnu.org/software/make/man...-Messages.html

Thanks jdk, here is my code. I use c

#include <linux/kernel.h>

asmlinkage long sys_hello(void)
{
printk("Hello world\n");
return 0;
}


This is the Makefile where I update only one line:


ifeq ($(KBUILD_EXTMOD),)
core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/hello/

vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
$(core-y) $(core-m) $(drivers-y) $(drivers-m) \
$(net-y) $(net-m) $(libs-y) $(libs-m)))

vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
$(init-n) $(init-) \
$(core-n) $(core-) $(drivers-n) $(drivers-) \
$(net-n) $(net-) $(libs-n) $(libs-))))

init-y := $(patsubst %/, %/built-in.o, $(init-y))
core-y := $(patsubst %/, %/built-in.o, $(core-y))
drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
net-y := $(patsubst %/, %/built-in.o, $(net-y))
libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
libs-y := $(libs-y1) $(libs-y2)

....................
I created another Makefile inside the folder I created named as hello

obj-y := sys_hello.o

Thank you ,I'll look at it..