[libc++] In <format>, use availability macro if including <locale>

var-const · var-const · commit df8a44caec40 · 2024-07-16T23:31:58.000-07:00
This is a follow-up to llvm#85478, similar to llvm#95686.
diff --git a/libcxx/include/format b/libcxx/include/format
@@ -224,7 +224,9 @@ namespace std {
 #endif
 
 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
+#  if !defined(_LIBCPP_HAS_NO_LOCALIZATION)
 #  include <locale>
+#  endif
 #  include <queue>
 #  include <stack>
 #endif
