Re: nstrftime %c bug w.r.t. time zone

[Bruno Haible]

> 2024-02-08  Bruno Haible  <bruno@clisp.org>
> 
>       nstrtime, c-nstrftime: Fix %c directive's result on NetBSD, Solaris.
>       * lib/strftime.c (__strftime_internal): On NetBSD and Solaris, remove
>       the last word of the %c directive's result if it looks like a time zone.

This patch adds a mention of the problem to the documentation:


diff --git a/doc/posix-functions/strftime.texi 
b/doc/posix-functions/strftime.texi
index 7c4c0391fa..b62ea37fdb 100644
--- a/doc/posix-functions/strftime.texi
+++ b/doc/posix-functions/strftime.texi
@@ -16,6 +16,11 @@
 Portability problems not fixed by Gnulib:
 @itemize
 @item
+The %c specifier does not work with a time retrieved through @code{gmtime}
+or @code{gmtime_r}, since it outputs also the current time zone,
+on some platforms:
+NetBSD 9.3, Solaris 11.4.
+@item
 The %r specifier produces empty output, at least in a French locale,
 on some platforms:
 macOS 12.5, FreeBSD 14.0.