Clock in POSIX API

[Richard M. Barry]

I want to use the time of day in my (POSIX) application.  So I need to set the realtime clock in the beginning of my application.  I do this with a call to clock_settime(), but it returns with an error (errno==EINVAL).  I can't figure out why, any ideas?  I'm guessing it's some #define or #include that I left out, but I have no idea what.   Part of the code follows:


#define CONFIGURE_TEST_NEEDS_CLOCK_DRIVER
#define CONFIGURE_MAXIMUM_POSIX_THREADS 5
#define CONFIGURE_MAXIMUM_POSIX_MUTEXES 20
#define CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES 20
#define CONFIGURE_MAXIMUM_POSIX_SEMAPHORES 20
#define CONFIGURE_POSIX_INIT_THREAD_TABLE

#define CONFIGURE_MAXIMUM_POSIX_TIMERS 4

#include <time.h>
#include <sys/features.h>
#include <errno.h>
...

#ifndef _POSIX_TIMERS
#error "rtems is supposed to have clock_settime"
#endif

...

void *POSIX_Init( void *argument )
{	
	struct timespec tim;
	time_t *now;
	
	tim.tv_sec = 10000;   // Just a number, can be anything for what I care
	tim.tv_nsec = 0;

	status = clock_settime( CLOCK_REALTIME,&tim );
	
	if(status==-1)
	{
	    printf("INIT: errno=%d , EINVAL=%d\n",errno,EINVAL);
	}
	assert(!status);
...



Thanks,
Richard