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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2021/10/19 04:17:13 UTC

[GitHub] [incubator-nuttx] xiaoxiang781216 commented on pull request #4693: time:follow POSIX use int64_t to define time_t

xiaoxiang781216 commented on pull request #4693:
URL: https://github.com/apache/incubator-nuttx/pull/4693#issuecomment-946353572


   > as far as i know, unsigned time_t is allowed by posix.  this change requires more explanation than "follow posix".
   
   ISO-C allow signed or unsigned time_t, but POSIX require the signed integer:
   https://pubs.opengroup.org/onlinepubs/009695399/basedefs/sys/types.h.html
   From this thread:
   https://stackoverflow.com/questions/471248/what-is-time-t-ultimately-a-typedef-to
   Most Unix variant OS use signed integer represent time_t, so it's better to follow the common practice to improve the compability.
   
   


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