Hello, a Boost newbie question: Arch: PPC, OS: Mac OS X 10.4.10, Compiler: GCC 4.0.1 In a C++ dynamic library, I'm just developing, I have: #include namespace MyNameSpace { typedef boost::shared_ptrstd::string StringPtr; } I get the following warning: /usr/local/include/boost/shared_ptr.hpp: In instantiation of 'boost::shared_ptrstd::string': /Volumes/blablabla/MyClass.cpp:81: instantiated from here /usr/local/include/boost/shared_ptr.hpp:131: warning: 'class boost::shared_ptrstd::string' has pointer data members /usr/local/include/boost/shared_ptr.hpp:131: warning: but does not override 'boost::shared_ptrstd::string(const boost::shared_ptrstd::string&)' The incriminated line in MyClass.cpp is the second line here: __attribute__((visibility("default"))) MyNameSpace::StringPtr MyClass::myFunction() const { /* .......... */ } I have experienced the same with classes of my own instead of std::string, i.e. with typedef boost::shared_ptr<MyOtherClass> MyOtherClassPtr; etc. May be it's just me, but the boost documentation and Google don't help. Can I ignore the warnings or should I do something? Thanks in advance Klaus