+dnl Notice that unlike the functions below, this one seems to be present in all
+dnl support OS X versions so it's OK to test for it here.
+AC_CHECK_FUNCS(wcsftime)
+
+dnl OS X provides the wide character functions (and also strnlen(), for some
+dnl reason) only starting from 10.7 so our tests would succeed if we're
+dnl configuring under 10.7 or later, yet the compiled programs would fail if
+dnl ran under 10.6 or earlier. To avoid this problem, define the corresponding
+dnl HAVE_XXX in wx/osx/config_xcode.h instead of testing for them here.
+if test "$wxUSE_MAC" != 1; then
+ AC_CHECK_FUNCS([strnlen wcsdup wcsnlen wcscasecmp wcsncasecmp])
+fi