2 # See if we have a working tzset function.
3 # If so, arrange to compile the wrapper function.
4 # For at least Solaris 2.5.1 and 2.6, this is necessary
5 # because tzset can clobber the contents of the buffer
8 # Written by Paul Eggert and Jim Meyering.
10 AC_DEFUN([gl_FUNC_TZSET_CLOBBER],
12 AC_REQUIRE([AC_HEADER_TIME])
13 AC_CACHE_CHECK([whether tzset clobbers localtime buffer],
14 gl_cv_func_tzset_clobber,
16 AC_RUN_IFELSE([AC_LANG_SOURCE([[
17 #if TIME_WITH_SYS_TIME
18 # include <sys/time.h>
22 # include <sys/time.h>
32 time_t t1 = 853958121;
37 putenv ("TZ=EST+3EDT+2,M10.1.0/00:00:00,M2.3.0/00:00:00");
39 exit (p->tm_year != s.tm_year
40 || p->tm_mon != s.tm_mon
41 || p->tm_mday != s.tm_mday
42 || p->tm_hour != s.tm_hour
43 || p->tm_min != s.tm_min
44 || p->tm_sec != s.tm_sec);
47 [gl_cv_func_tzset_clobber=no],
48 [gl_cv_func_tzset_clobber=yes],
49 [gl_cv_func_tzset_clobber=yes])])
51 AC_DEFINE(HAVE_RUN_TZSET_TEST, 1,
52 [Define to 1 if you have run the test for working tzset.])
54 if test $gl_cv_func_tzset_clobber = yes; then
55 gl_GETTIMEOFDAY_REPLACE_LOCALTIME
57 AC_DEFINE(tzset, rpl_tzset,
58 [Define to rpl_tzset if the wrapper function should be used.])
59 AC_DEFINE(TZSET_CLOBBERS_LOCALTIME_BUFFER, 1,
60 [Define if tzset clobbers localtime's static buffer.])