[LTP] nanosleep: use POSIX runtime detection for CLOCK_MONOTONIC

[linuxtestproject.agent@gmail.com]

Hi Andrea,

On Thu, 16 Apr 2026 08:59:59 +0200, Andrea Cervesato wrote:
> nanosleep: use POSIX runtime detection for CLOCK_MONOTONIC

> -#include <unistd.h>
>  #include <sys/wait.h>
>  #include "posixtest.h"
> -
> -#ifdef _POSIX_MONOTONIC_CLOCK
> -#define TEST_CLOCK CLOCK_MONOTONIC
> -#else
> -#define TEST_CLOCK CLOCK_REALTIME
> -#endif
> +#include "helpers.h"

This applies to 1-2.c, 1-3.c, 3-2.c, and 7-2.c. These files call
fork() and sleep() — both declared in <unistd.h> — but the explicit
#include <unistd.h> is removed and now only arrives transitively via
helpers.h. Each file should include the headers it directly uses;
please keep #include <unistd.h> in these four files.

---
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