2 @subsection @code{tzname}
5 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/tzname.html}
9 Portability problems fixed by Gnulib:
12 This variable is called @code{_tzname} on some platforms:
13 mingw with @code{-DNO_OLDNAMES}, MSVC.
16 Portability problems not fixed by Gnulib:
19 This variable's contents are unreliable if you use a geographical
20 @env{TZ} setting like @code{TZ="America/Los_Angeles"}.
22 The address of this variable is not a compile-time constant on some platforms:
25 Native Windows platforms (mingw, MSVC) support only a subset of time
26 zones supported by GNU or specified by POSIX@. @xref{tzset}.
29 This variable is vestigial: it is not needed and does not suffice in general.
30 It is planned to be removed from a future version of POSIX@.
31 A more portable way of getting the time zone abbreviation is to use
32 @code{strftime} with the @code{%Z} format. @xref{strftime}.