Hi Esmaeil, On Fri, Sep 09, 2011 at 03:52:29AM -0400, esmaeil mirzaee wrote: > Hi all > I apologize for weak English and speaking ambiguously. > > I download Linux kernel and I love to learn about it. > I try to compile a file like ~/kernel/acct.c but I've got error anyone > can help me. > > $ gcc acct.c -o ac > acct.c:46: fatal error: linux/mm.h: No such file or directory > compilation terminated. You should first learn with smaller projects :-) you CAN'T compile the linux kernel this way (just by passing single files to gcc). Instead: - you need specific flags on the command line - you have to tell gcc where to look for include files (e.g. where to find "linux/mm.h"), also by passing appropriate command line flags - you can only compile a single file (adding "-c" to the command line), you can't link it into an executable (that's what you tried). All this procedure is automated for the linux kernel by its Makefile: The standard way of compiling the kernel is (you can also google for it): "make menuconfig" (this will ask you MANY questions about which drivers to include into the kernel) "make" (to compile and link the kernel itself -- this will run "gcc") "make modules" (to compile all kernel modules) "make install" (to install the kernel) By the ways, that's not a real gcc-related question, so it might be better to ask it on a mailing-list of your linux-distribution (there, the people will know how you can install all software necessary to compile a kernel). Axel
