tzset: Remove workaround for Solaris 2.6.

* m4/tzset.m4 (gl_FUNC_TZSET_CLOBBER): Remove macro.
(gl_FUNC_TZSET): Don't invoke it. Don't define TZSET_CLOBBERS_LOCALTIME.
Don't require gl_LOCALTIME_BUFFER_DEFAULTS.
* lib/localtime-buffer.h: Don't test TZSET_CLOBBERS_LOCALTIME.
* lib/localtime-buffer.c: Likewise.
* lib/localtime.c: Likewise.
* lib/tzset.c: Don't include localtime-buffer.h.
(tzset): Don't test TZSET_CLOBBERS_LOCALTIME.
* lib/nstrftime.c (__strftime_internal): Assume HAVE_RUN_TZSET_TEST
is 1.
* modules/tzset (Depends-on): Remove localtime-buffer.

1 files changed, 1 insertions, 64 deletions

diff --git a/m4/tzset.m4 b/m4/tzset.m4
index 7d987d8860..31ef601a04 100644
--- a/m4/tzset.m4
+++ b/m4/tzset.m4
@@ -1,85 +1,22 @@
-# serial 13
+# serial 14
 
 # Copyright (C) 2003, 2007, 2009-2020 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
-# See if we have a working tzset function.
-# If so, arrange to compile the wrapper function.
-# For at least Solaris 2.5.1 and 2.6, this is necessary
-# because tzset can clobber the contents of the buffer
-# used by localtime.
-
 # Written by Paul Eggert and Jim Meyering.
 
 AC_DEFUN([gl_FUNC_TZSET],
 [
   AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
-  AC_REQUIRE([gl_LOCALTIME_BUFFER_DEFAULTS])
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_CHECK_FUNCS_ONCE([tzset])
   if test $ac_cv_func_tzset = no; then
     HAVE_TZSET=0
   fi
-  gl_FUNC_TZSET_CLOBBER
   REPLACE_TZSET=0
-  case "$gl_cv_func_tzset_clobber" in
-    *yes)
-      REPLACE_TZSET=1
-      AC_DEFINE([TZSET_CLOBBERS_LOCALTIME], [1],
-        [Define if tzset clobbers localtime's static buffer.])
-      gl_LOCALTIME_BUFFER_NEEDED
-      ;;
-  esac
   case "$host_os" in
     mingw*) REPLACE_TZSET=1 ;;
   esac
 ])
-
-# Set gl_cv_func_tzset_clobber.
-AC_DEFUN([gl_FUNC_TZSET_CLOBBER],
-[
-  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  AC_CACHE_CHECK([whether tzset clobbers localtime buffer],
-                 [gl_cv_func_tzset_clobber],
-    [AC_RUN_IFELSE([AC_LANG_SOURCE([[
-#include <time.h>
-#include <stdlib.h>
-
-int
-main ()
-{
-  time_t t1 = 853958121;
-  struct tm *p, s;
-  putenv ("TZ=GMT0");
-  p = localtime (&t1);
-  s = *p;
-  putenv ("TZ=EST+3EDT+2,M10.1.0/00:00:00,M2.3.0/00:00:00");
-  tzset ();
-  return (p->tm_year != s.tm_year
-          || p->tm_mon != s.tm_mon
-          || p->tm_mday != s.tm_mday
-          || p->tm_hour != s.tm_hour
-          || p->tm_min != s.tm_min
-          || p->tm_sec != s.tm_sec);
-}
-  ]])],
-       [gl_cv_func_tzset_clobber=no],
-       [gl_cv_func_tzset_clobber=yes],
-       [case "$host_os" in
-                         # Guess all is fine on glibc systems.
-          *-gnu* | gnu*) gl_cv_func_tzset_clobber="guessing no" ;;
-                         # Guess all is fine on musl systems.
-          *-musl*)       gl_cv_func_tzset_clobber="guessing no" ;;
-                         # Guess no on native Windows.
-          mingw*)        gl_cv_func_tzset_clobber="guessing no" ;;
-                         # If we don't know, obey --enable-cross-guesses.
-          *)             gl_cv_func_tzset_clobber="$gl_cross_guess_inverted" ;;
-        esac
-       ])
-    ])
-
-  AC_DEFINE([HAVE_RUN_TZSET_TEST], [1],
-    [Define to 1 if you have run the test for working tzset.])
-])