[PATCH 2/2] libc/include/time.h: Add TIME_MONOTONIC for C23

[Howland, Craig D. - US]

> From: Joel Sherrill <joel@rtems.org>
> Sent: Thursday, April 16, 2026 6:06 PM
> To: newlib@sourceware.org <newlib@sourceware.org>
> Cc: Joel Sherrill <joel@rtems.org>
> Subject: [PATCH 2/2] libc/include/time.h: Add TIME_MONOTONIC for C23
> ---
>  newlib/libc/include/time.h | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/newlib/libc/include/time.h b/newlib/libc/include/time.h
> index e972bd416..429dd8bd9 100644
> --- a/newlib/libc/include/time.h
> +++ b/newlib/libc/include/time.h
> @@ -63,6 +63,9 @@ time_t           time (time_t *_timer);
>  int        timespec_get(struct timespec *ts, int base);
>  #endif
>  #if (__ISO_C_VISIBLE >= 2023)
> +#define TIME_MONOTONIC 2
> +#endif
> +#if (__ISO_C_VISIBLE >= 2023)
>  int        timespec_getres(struct timespec *ts, int base);
>  #endif
>  #ifndef _REENT_ONLY

     Any particular reason for two of the same #if?  I can't think of one, merge them.
     Additionally, this also could be grouped within the preceding #if (__ISO_C_VISIBLE >= 2011 || __POSIX_VISIBLE >= 202405), which would make it read a little more cleanly.
     Speaking of cleanly, this diff appears to be based on a corrupted file version, fails to apply.  (It is lacking #define TIME_UTC, e.g.)

Snippet from present time.h:

#if (__ISO_C_VISIBLE >= 2011 || __POSIX_VISIBLE >= 202405)
#define TIME_UTC 1

int        timespec_get(struct timespec *ts, int base);
#endif

Suggested end result:
#if (__ISO_C_VISIBLE >= 2011 || __POSIX_VISIBLE >= 202405)
#define TIME_UTC 1
int        timespec_get(struct timespec *ts, int base);
 #if (__ISO_C_VISIBLE >= 2023)
 #define TIME_MONOTONIC 2
int        timespec_getres(struct timespec *ts, int base);
 #endif
#endif

Craig



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