vector<T>::push_back()

[Plechámíd Martin]

Title: vector<T>::push_back()





Hello.


I noted, that when using the push_back(contst T) method of the vector<T> class, the linker is looking for some iostream functions - even though I don't use the "iostream" library in my program. Other methods don't cause this behaviour. This needn't be a bug, but it seems strange to me.

test.cpp:


   #include <vector>
   int main(int argc, char* argv[])
   {
      std::vector<long> vv;
      vv.push_back(2);
      return 0;
   }


When I don't have the appropriate lib-file with iostream functions in the searched path, the linker complains:


   test.o: In function `__malloc_alloc_template<0>::_S_oom_malloc(unsigned int)':
   test.o(.__malloc_alloc_template<0>::gnu.linkonce.t._S_oom_malloc(unsigned int)+0x1a): undefined reference to `endl(ostream &)'

   test.o(.__malloc_alloc_template<0>::gnu.linkonce.t._S_oom_malloc(unsigned int)+0x27): undefined reference to `cerr'
   test.o(.__malloc_alloc_template<0>::gnu.linkonce.t._S_oom_malloc(unsigned int)+0x2c): undefined reference to `ostream::operator<<(char const *)'

   test.o(.__malloc_alloc_template<0>::gnu.linkonce.t._S_oom_malloc(unsigned int)+0x37): undefined reference to `ostream::operator<<(ostream &(*)(ostream &))'

   collect2: ld returned 1 exit status


Best regards,
                        Martin.