Compiling ppdc-array.cxx...
ppdc-array.cxx:34:31: error: implicit conversion changes signedness: 'int' to
      'unsigned long' [-Werror,-Wsign-conversion]
      data = new ppdcShared *[count];
             ~~~              ^~~~~
ppdc-array.cxx:84:30: error: implicit conversion changes signedness: 'int' to
      'unsigned long' [-Werror,-Wsign-conversion]
    temp  = new ppdcShared *[alloc];
            ~~~              ^~~~~
2 errors generated.