[LTP] [PATCH v2] clock_settime: use POSIX runtime detection for CLOCK_MONOTONIC

[Petr Vorel]

Hi Andrea,

> +#include <unistd.h>
> +#include "clock.h"

>  static int getBeforeTime(struct timespec *tpget)
>  {
> @@ -37,53 +42,53 @@ static int setBackTime(struct timespec tpset)

>  #define PTS_MONO_MAX_RETRIES 3

> -#ifdef _POSIX_MONOTONIC_CLOCK
> -static struct timespec _pts_mono_start;
> +static struct timespec pts_mono_start;

>  static inline int pts_mono_time_start(void)
>  {
> -	if (clock_gettime(CLOCK_MONOTONIC, &_pts_mono_start) != 0) {
> +	if (!pts_mono_available()) {
> +		static int warned;
> +
> +		if (!warned) {
> +			printf("CLOCK_MONOTONIC unavailable, test may fail due to clock adjustment\n");
> +			warned = 1;
> +		}
Function with this warning could be in include/clock.h as well, because that
will be needed for nanosleep tests. But you can postpone it to nanosleep
changes.

Reviewed-by: Petr Vorel <pvorel@suse.cz>

Kind regards,
Petr

> +		return 0;
> +	}
...