Avoid undefined symbols with mingw-w64

Fixes issue fmtlib#2691
rbberger · Jan 3, 2022 · 1cc8529 · 1cc8529
1 parent 8e59744
commit 1cc8529
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/include/fmt/chrono.h b/include/fmt/chrono.h
@@ -1082,7 +1082,7 @@ template <typename OutputIt, typename Char> class tm_writer {
   }
   template <typename T, FMT_ENABLE_IF(!has_member_data_tm_gmtoff<T>::value)>
   void format_utc_offset_impl(const T& tm) {
-#if defined(_WIN32)
+#if defined(_WIN32) && defined(_UCRT)
 #  if FMT_USE_TZSET
     tzset_once();
 #  endif