AC_DEFUN(LIBU77_GETTIMEOFDAY, [
AC_CHECK_FUNCS(gettimeofday)
if test "$ac_cv_func_gettimeofday" = yes; then
AC_CACHE_CHECK([for struct timezone], g77_cv_struct_timezone,
[AC_TRY_COMPILE([ [struct timezone tz;],
g77_cv_struct_timezone=yes, g77_cv_struct_timezone=no)])
if test $g77_cv_struct_timezone = yes; then
AC_TRY_RUN([
main ()
{
struct timeval time;
struct timezone dummy;
if (gettimeofday (&time, &dummy))
exit (1);
else
exit (0);
}],
[AC_DEFINE(HAVE_TIMEZONE)], ,[AC_DEFINE(HAVE_TIMEZONE)])
fi
AC_REQUIRE([AC_HEADER_TIME])
AC_CACHE_CHECK(whether gettimeofday can accept two arguments,
emacs_cv_gettimeofday_two_arguments,
AC_TRY_LINK([
],
[
struct timeval time;
struct timezone dummy;
gettimeofday (&time, DUMMY);],
emacs_cv_gettimeofday_two_arguments=yes,
emacs_cv_gettimeofday_two_arguments=no))
if test $emacs_cv_gettimeofday_two_arguments = no; then
AC_DEFINE(GETTIMEOFDAY_ONE_ARGUMENT)
fi
fi])