Silence Xcode 11 warnings about shadowing read()

include/wx/file.h

@@ -32,11 +32,16 @@ class WXDLLIMPEXP_BASE wxFile
 public:
   // more file constants
   // -------------------
+  // suppress Xcode 11 warning about shadowing global read() symbol
+  wxCLANG_WARNING_SUPPRESS(shadow)
+
     // opening mode
   enum OpenMode { read, write, read_write, write_append, write_excl };
     // standard values for file descriptor
   enum { fd_invalid = -1, fd_stdin, fd_stdout, fd_stderr };
 
+  wxCLANG_WARNING_RESTORE(shadow)
+
   // static functions
   // ----------------
     // check whether a regular file by this name exists