Hi, I am facing problems while I try to compile a simple "Hello World" Kernel module. I am using RHEL 5 (2.6.12.x kernel). This is the program that I am trying to compile. /************************* Hello World Kernel Module *********************/ #define MODULE #define LINUX #define __KERNEL__ #include <linux/module.h> /* Needed by all modules */ #include <linux/kernel.h> /* Needed for KERN_ALERT */ int init_module(void) { printk("<1>Hello world 1.\n"); // A non 0 return means init_module failed; module can't be loaded. return 0; } void cleanup_module(void) { printk(KERN_ALERT "Goodbye world 1.\n"); } MODULE_LICENSE("GPL"); /*************************** End of the Module ***************************/ The make file that I am using is /************************* Hello World Makefile *************************/ 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 /*************************** End of the Makefile *******************/ The error that I am getting is that "/lib/modules/$(shell uname -r)/build cannot be found" or something like that. I did find the /build, but there was nothing in it. I am facing this only while I try this with RHEL 5 or FC 7. Thank you, Regards,, Aravind. "Dovie'andi se tovya sagain" -Mat Cauthon (WoT). -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ