6.61.13 Visibility Pragmas

#pragma GCC visibility push( visibility )
#pragma GCC visibility pop
This pragma allows the user to set the visibility for multiple declarations without having to give each a visibility attribute (see Function Attributes ).

In C++, ‘ #pragma GCC visibility ’ affects only namespace-scope declarations. Class members and template specializations are not affected; if you want to override the visibility for a particular member or instantiation, you must use an attribute.