C++: warning: '…' declared with greater visibility than the type of its field '…::'

Question

I\'m getting these two warnings (with GCC 4.2 on MacOSX):

/Users/az/Programmierung/openlierox/build/Xcode/../../src/main.cpp:154:0 /Users/az/Programmierung/openliero

Answer 1

To fix this problem, try one of below.

1. Use #pragma GCC visibility push() statement like this.

   #pragma GCC visibility push(hidden)
   struct MainLockDetector : Action {
        bool wait(Uint32 time) { /* ... */ }
        int handle() { /* ... */ }
   };
   #pragma GCC visibility pop
   

2. Use __attribute__ ((visibility("hidden"))) like this.

   struct __attribute__ ((visibility("hidden"))) MainLockDetector : Action {
        bool wait(Uint32 time) { /* ... */ }
        int handle() { /* ... */ }
   };
   

3. Add the command line option -fvisibility=default.

For more details, refer http://gcc.gnu.org/wiki/Visibility.