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69 lines
1.9 KiB
Plaintext
69 lines
1.9 KiB
Plaintext
#serial 1
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# See if we have a working tzset function.
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# If so, arrange to compile the wrapper function.
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# For at least Solaris 2.5.1 and 2.6, this is necessary
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# because tzset can clobber the contents of the buffer
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# used by localtime.
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# Written by Paul Eggert and Jim Meyering.
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AC_DEFUN([gl_FUNC_TZSET_CLOBBER],
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[
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AC_REQUIRE([AC_HEADER_TIME])
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AC_CACHE_CHECK([whether tzset clobbers localtime buffer],
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gl_cv_func_tzset_clobber,
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[
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AC_RUN_IFELSE([AC_LANG_SOURCE([[
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#if TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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#else
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# if HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# include <time.h>
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# endif
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#endif
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#include <stdlib.h>
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int
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main ()
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{
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time_t t1 = 853958121;
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struct tm *p, s;
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putenv ("TZ=GMT0");
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p = localtime (&t1);
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s = *p;
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putenv ("TZ=EST+3EDT+2,M10.1.0/00:00:00,M2.3.0/00:00:00");
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tzset ();
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exit (p->tm_year != s.tm_year
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|| p->tm_mon != s.tm_mon
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|| p->tm_mday != s.tm_mday
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|| p->tm_hour != s.tm_hour
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|| p->tm_min != s.tm_min
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|| p->tm_sec != s.tm_sec);
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}
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]])],
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[gl_cv_func_tzset_clobber=no],
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[gl_cv_func_tzset_clobber=yes],
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[gl_cv_func_tzset_clobber=yes])])
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AC_DEFINE(HAVE_RUN_TZSET_TEST, 1,
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[Define to 1 if you have run the test for working tzset.])
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if test $gl_cv_func_tzset_clobber = yes; then
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# Caution: the following few lines should be the same
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# as those in gettimeofday.m4.
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AC_LIBOBJ(gettimeofday)
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AC_DEFINE(gmtime, rpl_gmtime,
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[Define to rpl_gmtime if the replacement function should be used.])
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AC_DEFINE(localtime, rpl_localtime,
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[Define to rpl_localtime if the replacement function should be used.])
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AC_DEFINE(tzset, rpl_tzset,
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[Define to rpl_tzset if the wrapper function should be used.])
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AC_DEFINE(TZSET_CLOBBERS_LOCALTIME_BUFFER, 1,
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[Define if tzset clobbers localtime's static buffer.])
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fi
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])
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