* configure.in: Use AC_CHECK_MEMBER for struct tm.tm_gmtoff test.

Author: notroj

configure.in

@@ -567,13 +567,10 @@ case ${host}X${ac_cv_func_gettid}X${ap_cv_gettid} in
 esac
 
 dnl ## Check for the tm_gmtoff field in struct tm to get the timezone diffs
-AC_CACHE_CHECK([for tm_gmtoff in struct tm], ac_cv_struct_tm_gmtoff,
-[AC_TRY_COMPILE([#include <sys/types.h>
-#include <time.h>], [struct tm tm; tm.tm_gmtoff;],
-  ac_cv_struct_tm_gmtoff=yes, ac_cv_struct_tm_gmtoff=no)])
-if test "$ac_cv_struct_tm_gmtoff" = "yes"; then
-    AC_DEFINE(HAVE_GMTOFF, 1, [Define if struct tm has a tm_gmtoff field])
-fi
+AC_CHECK_MEMBER([struct tm.tm_gmtoff],
+    [AC_DEFINE(HAVE_GMTOFF, 1, [Define if struct tm has a tm_gmtoff field])], [],
+    [#include <sys/types.h>
+#include <time.h>])
 
 AC_CHECK_DECL(CMSG_DATA,,, [#include <sys/types.h>
 #include <sys/socket.h>])