Hi All
I am facing following problem for installing kernel Module.
I have a Makefile which compiles multiple source files for the module and then link it using ld as follow,
(a potion of Makfile)

CFLAGS = -D__KERNEL__ -DMODULE -I$(KERNEL)/include
ent_api_mod.o: char_driver.o Ent_oal.o Ent_cfg_annc.o
ld -r -o ent_api_mod.o char_driver.o Ent_oal.o

I am using Linux Kernel 2.4.20-8. I am able to get the compiled module ent_api_mod.o
But when I try to use /sbin/insmod ent_api_mod.o, it gives me unresolved symbol errors for POSIX semaphohre system calls(sem_init,sme_destroy,sem_post,sem_wait)

Please help me how can I solve this problem

Regards
Yogi

1) do not mark threads as urgent, it's just plain rude.

2) use decent titles that give an insight to the problem you are having.

having unresolved symbols in most cases means that the module needs another module to be loaded before.
If the module is installed in /lib/modules/<kernel-version> with the rest of the modules then you may use modprobe instead of insmod. It tracks down this kind of dependencies.

Thanks for the responses.

Only the POSIX semaphore system calls are showing unresolved symbol(sem_init,sem_destroy,sem_wait,sem_post). So I am wondering if I can add some lib files in the ld command which can resolve these references before installing the module. But do not know which all libs to include. This could be one option.

Are there any other options to overcome this.

Please please reply!!!

Regards
yogi

I don't think you can link any library to modules or the kernel.
The kernel does not use any library, not even glibc.
Anything you need for a module should be in another module or in the kernel.

*EDIT*
Have you tried make install?