where are system standard include directories in Ubuntu

Hello group,

I just wanted to know where are system standard include and libraries
directories in Ubuntu?
I searched in usr/include and usr/local/include and I could not find
any header?!!
I appreciate it if you send me the list of the directories the gcc
looks for the header files and libraries for compilation in Linux
Ubuntu.
Also what does it means if we insert sys before a header file like
#include<sys/types.h>?does it refer to any specific directory?

Thanks for you help
bobby

bobby wrote:
Hello group,
>
I just wanted to know where are system standard include and libraries
directories in Ubuntu?
Not topical in thie group, try a linux group or comp.unix.programmer

I searched in usr/include and usr/local/include and I could not find
/usr/include, i.e. leading /
If not there, most probably the develpment packages haven't been installed

any header?!!
I appreciate it if you send me the list of the directories the gcc
looks for the header files and libraries for compilation in Linux
Ubuntu.
Also what does it means if we insert sys before a header file like
#include<sys/types.h>?does it refer to any specific directory?
/usr/include/sys/types.h

Thanks for you help
bobby

Bye, Jojo