Thank you for reply On Fri, Sep 9, 2011 at 4:55 AM, Pelle Windestam <pelle@windestam.se> wrote:

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$ gcc acct.c -o ac acct.c:46: fatal error: linux/mm.h: No such file or directory compilation terminated.

That is because gcc does not know where to look for the included mm.h-file, the gcc compiler needs to be specifically told where to look for include files if they are not in the standard directories. You can do that by passing it the -I option followed by the directory to look in.

You mean I must put the address of library when I try to compile if yes. ~/linux-2.6.39.3/kernel the file is in this place (acct.c). Could you give me form of compile command it can be like this gcc -i ~/linux-2.6.39.3/kernel acct.c -o acct esmaeil