Google
 
Trailing-Edge - PDP-10 Archives - SRI_NIC_PERM_FS_1_19910112 - kcc-4/include/stddef.h
There are 4 other files named stddef.h in the archive. Click here to see a list.
/* <stddef.h>	ANSI common definition header file */

#ifndef _INCLUDE_STDDEF		/* Include only once */
#define _INCLUDE_STDDEF 1

#define NULL (0)
typedef int ptrdiff_t;
typedef unsigned size_t;
extern int errno;

#endif