diff options
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]) |