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| author | Richard M. Stallman <rms@gnu.org> | 1996-02-28 23:25:27 +0000 |
|---|---|---|
| committer | Richard M. Stallman <rms@gnu.org> | 1996-02-28 23:25:27 +0000 |
| commit | 22cc077c309591b393e23b8033ffb3f134b59e69 (patch) | |
| tree | e065ba8afec319aba5ce00ac3e1c5dc40f55a05b /configure.in | |
| parent | 037987b711819ef71b6188e1a8e44190d3731329 (diff) | |
| download | emacs-22cc077c309591b393e23b8033ffb3f134b59e69.tar.gz | |
(LOCALTIME_CACHE): Also define if localtime mishandles unsetting TZ.
This works around a localtime bug in mips-dec-ultrix.
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/configure.in b/configure.in index da8b2efc794..a977091e79f 100644 --- a/configure.in +++ b/configure.in @@ -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]) |