[ILUG] C compilation error

[Niall O Broin]

On Sun, Jan 27, 2002 at 02:09:02AM +0000, kevin lyda wrote:

> someone else made the perl comment.

Sorry Kev - it was late at night.

> 
> > The question of why sys/time.h is not including time.h remains open.
> 
> generally i assume that foo.h includes sys/foo.h if they're related
> and i look for header files in /usr/include for functions in section 3
> (aka libc); in /usr/include/sys for functions in section 2 (system calls).

I didn't make any assumptions - I RTFIF. Skipping comments, on the SuSE 6.4
box /usr/include/sys/time.h begins like this

#ifndef _SYS_TIME_H
#define _SYS_TIME_H     1

#include <features.h>

#include <time.h>

and on the SuSE 7.3 box it begins like this

#ifndef _SYS_TIME_H
#define _SYS_TIME_H	1

#include <features.h>

#include <bits/types.h>
#define __need_time_t
#include <time.h>


and as the first line in the program is 

#include <sys/time.h>

there's no way that _SYS_TIME_H is already defined so time.h should be
included, and cc -E seems to show that it is and yet the definition of a
struct tm seems to be missing.




Niall