[libc++] Add missing include of <wchar.h> in POSIX locale fallbacks

ldionne · ldionne · commit 09531e34eec1 · 2024-02-05T12:04:07.000-05:00
diff --git a/libcxx/include/__support/xlocale/__posix_l_fallback.h b/libcxx/include/__support/xlocale/__posix_l_fallback.h
@@ -21,6 +21,7 @@
 #include <time.h>
 
 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#  include <wchar.h>
 #  include <wctype.h>
 #endif
 
