58 lines
1.8 KiB
Plaintext
58 lines
1.8 KiB
Plaintext
@node strftime
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@subsection @code{strftime}
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@findex strftime
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POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/strftime.html}
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Gnulib module: strftime-fixes
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@mindex strftime-fixes
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Portability problems fixed by Gnulib:
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@itemize
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@item
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On native Windows platforms (mingw, MSVC), this function works incorrectly
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when the environment variable @env{TZ} has been set by Cygwin.
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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The %c specifier does not work with a time retrieved through @code{gmtime}
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or @code{gmtime_r}, since it outputs also the current time zone,
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on some platforms:
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glibc 2.30, NetBSD 10.0, Solaris 11.4.
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@item
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The %c specifier produces no weekday name and no month name, only a
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potentially ambiguous numerical output, on some platforms:
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mingw, MSVC.
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@item
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The %h specifier produces empty output on some platforms:
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mingw, MSVC.
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@item
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The %r specifier produces empty output on some platforms:
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mingw, MSVC.
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@item
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The %r specifier produces empty output, at least in a French locale,
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on some platforms:
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macOS 12.5, FreeBSD 14.0.
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@item
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The %r specifier includes an AM/PM indicator, at least in a French locale,
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on some platforms:
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NetBSD 10.0, Solaris 11.4.
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@item
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The %p specifier produces non-empty output, at least in a French locale,
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on some platforms:
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NetBSD 10.0, Solaris 11.4.
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@item
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The Windows C runtime library (which is used by MinGW) does not
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support the %e specifier (and possibly the other more recent SUS
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specifiers too, i.e., %C, %D, %h, %n, %r, %R, %t, and %T).
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@item
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Native Windows platforms (mingw, MSVC) support only a subset of time
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zones supported by GNU or specified by POSIX@. @xref{tzset}.
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@end itemize
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@mindex nstrftime
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Extension: Gnulib offers a module @samp{nstrftime} that provides an
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@code{nstrftime} function with various GNU extensions.
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