Bingo! I could compile the code successfully for the first time! Thank you very much Bill! Another small query: I do get warnings "implicit declaration of function `module_register_chrdev`" and for `module_unregister_chrdev`. How do I avoid it? Again, thanks Bill for your help! Atul. On Thu, 18 Jul 2002 05:40 -0400, Bill Kerr wrote: u> You must have the 'include' directory in your -I switch path, e.g., u> u> gcc -Wall -O2 -c -I/usr/src/linux/include mymodule.c u> u> The -O2 switch is needed for compiling kernel modules as many kernel u> functions are implemented as inline C functions. With lower levels u> of optimization, the compiler will generate *calls* to the (nonexistant) u> external functions instead of generating the inline code. u> u> BTW, a convention I've established the first few lines of modules u> compilied outside the kernel source tree is: u> u> #ifndef __KERNEL__ u> #define __KERNEL__ u> #endif u> u> #ifndef MODULE u> #define MODULE u> #endif u> u> /* determine whether to use checksummed versions of kernel symbols */ u> #include <linux/config.h> u> #ifdef CONFIG_MODVERSIONS u> #define MODVERSIONS u> #include <linux/modversions.h> u> #endif u> u> /* modversions.h redefines kernel symbols. Now include other headers */ u> #include <linux/kernel.h> u> #include <linux/module.h> u> #include <linux/init.h> u> u> u> u> -- bilker u> u> _______________________________________________ Redhat-devel-list mailing list Redhat-devel-list@redhat.com https://listman.redhat.com/mailman/listinfo/redhat-devel-list
