Deepak, I think you want "systm.h" rather than "system.h". The odd spelling trips up many first-time kext developers, but it is historical so we haven't "corrected" it. Cheers, - Dean On Sunday, January 5, 2003, at 08:16 PM, Deepak Kumar Singh wrote: Hi , I tried to build Hello kernel extension "kext" on MAC OS 10.2 with July 2002 Project Builder.which is documented in this site http://developer.apple.com/techpubs/macosx/Darwin/howto/ kext_tutorials/hello _kext/hello_kext.html <http://developer.apple.com/techpubs/macosx/Darwin/howto/ kext_tutorials/hell o_kext/hello_kext.html> but it is giving error <sys/system.h> file not found ... though i included Kernel.framework and in header search path , i also mentioned the sys/system.h path.... but still i am getting the same error ..... Please help me out ... Many thanx in advance Regards Deepak _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.