Commit 22cc077c authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

(LOCALTIME_CACHE): Also define if localtime mishandles unsetting TZ.

This works around a localtime bug in mips-dec-ultrix.
parent 037987b7
......@@ -3,7 +3,7 @@ dnl To rebuild the `configure' script from this, execute the command
dnl autoconf
dnl in the directory containing this script.
dnl
dnl Copyright (C) 1994, 1995 Free Software Foundation, Inc.
dnl Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
dnl
dnl This file is part of GNU Emacs.
dnl
......@@ -1375,16 +1375,31 @@ AC_TRY_RUN([#include <time.h>
#if STDC_HEADERS
# include <stdlib.h>
#endif
extern char **environ;
unset_TZ ()
{
char **from, **to;
for (to = from = environ; (*to = *from); from++)
if (! (to[0][0] == 'T' && to[0][1] == 'Z' && to[0][2] == '='))
to++;
}
main()
{
time_t now = time ((time_t *) 0);
int hour;
int hour_GMT0, hour_unset;
if (putenv ("TZ=GMT0") != 0)
exit (1);
hour = localtime (&now)->tm_hour;
hour_GMT0 = localtime (&now)->tm_hour;
unset_TZ ();
hour_unset = localtime (&now)->tm_hour;
if (putenv ("TZ=PST8") != 0)
exit (1);
exit (localtime (&now)->tm_hour == hour);
if (localtime (&now)->tm_hour == hour_GMT0)
exit (1);
unset_TZ ();
if (localtime (&now)->tm_hour != hour_unset)
exit (1);
exit (0);
}], emacs_cv_localtime_cache=no, emacs_cv_localtime_cache=yes,
[# If we have tzset, assume the worst when cross-compiling.
emacs_cv_localtime_cache=yes])
......
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