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Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/configure.in b/configure.in index f73df53..bcde551 100644 --- a/configure.in +++ b/configure.in @@ -2500,6 +2500,39 @@ then [Define if nice() returns success/failure instead of the new priority.]) fi +# tzset(3) exists and works like we expect it to +AC_MSG_CHECKING(for working tzset()) +AC_CACHE_VAL(ac_cv_working_tzset, [ +AC_TRY_RUN([ +#include <stdlib.h> +#include <time.h> +int main() +{ + int gmt_hour; + int eastern_hour; + time_t now; + now = time((time_t*)NULL); + putenv("TZ=GMT"); + tzset(); + gmt_hour = localtime(&now)->tm_hour; + putenv("TZ=US/Eastern"); + tzset(); + eastern_hour = localtime(&now)->tm_hour; + if (eastern_hour == gmt_hour) + exit(1); + exit(0); +} +], +ac_cv_working_tzset=yes, +ac_cv_working_tzset=no, +ac_cv_working_tzset=no)]) +AC_MSG_RESULT($ac_cv_working_tzset) +if test "$ac_cv_working_tzset" = yes +then + AC_DEFINE(HAVE_WORKING_TZSET, 1, + [Define if tzset() actually switches the local timezone in a meaningful way.]) +fi + # Look for subsecond timestamps in struct stat AC_MSG_CHECKING(for tv_nsec in struct stat) AC_CACHE_VAL(ac_cv_stat_tv_nsec, |