[LTP] nanosleep: use POSIX runtime detection for CLOCK_MONOTONIC

[linuxtestproject.agent@gmail.com]

Hi Andrea,

On Mon, 4 May 2026 15:20:18 +0200, Andrea Cervesato wrote:
> nanosleep: use POSIX runtime detection for CLOCK_MONOTONIC

> +static inline clockid_t pts_get_clock(void)
> +{
> +	if (pts_mono_available())
> +		return CLOCK_MONOTONIC;
> +
> +	printf("CLOCK_MONOTONIC unavailable, test may fail due to clock adjustment\n");
> +	return CLOCK_REALTIME;
> +}

Clean fix. Centralising the runtime detection into pts_get_clock() is the
right approach and correctly handles the Linux/glibc case where
_POSIX_MONOTONIC_CLOCK == 0 requires a sysconf() check.

Reviewed-by: LTP AI Reviewer <ltp-ai@noreply.github.com>

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