Mercurial > gnulib
view doc/posix-functions/localtime.texi @ 39291:27f187a5e5d0
time_rz: work around Mac OS X 10.6 infloop
* doc/posix-functions/localtime.texi:
* doc/posix-functions/localtime_r.texi: Mention the bug.
* lib/time_rz.c (localtime_rz): Work around the bug. It’d be
better to fix localtime and localtime_r instead, but that would be
more work and is not needed to fix the Emacs problem.
* m4/time_rz.m4 (gl_TIME_RZ): Detect the bug.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Mon, 26 Mar 2018 19:23:33 -0700 |
parents | d209db99ac8f |
children |
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@node localtime @section @code{localtime} @findex localtime POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/localtime.html} Gnulib module: localtime Portability problems fixed by Gnulib: @itemize @item On native Windows platforms (mingw, MSVC), this function works incorrectly when the environment variable @code{TZ} has been set by Cygwin. @end itemize Portability problems not fixed by Gnulib: @itemize @item On some platforms, this function loops forever for values near extrema (such as the year @math{-2**31}): Mac OS X 10.6. You can use the @code{time_rz} module to work around the problem. @item On some platforms, this function returns nonsense values for unsupported arguments (like @math{2^56}), rather than failing: FreeBSD 10. @item Native Windows platforms (mingw, MSVC) support only a subset of time zones supported by GNU or specified by POSIX. @xref{tzset}. @end itemize