How to get g++ to warn on unused member variables

Question

g++ generates warnings for unused local variables. Is it possible to have g++ warn for unused class member variables and/or global variables?

class Obj {
 public         


        

Answer 1

Clang's -Wunused-private-field enables the warning you're asking for. On your code base, it shows:

$ clang -Wunused-private-field /tmp/nic.cpp  
/tmp/nic.cpp:10:22: warning: private field 'num2' is not used [-Wunused-private-field]
             int num2;
                 ^
1 warning generated.