id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
5284	gcc-4.4.3 compiler warnings with Interprocess+Intrusive	Danny Mitzel <mitzel@…>	Ion Gaztañaga	"I've been using Boost Interprocess managed_shared_memory for
a short time.  My project was previously using a cross compiler
environment based on gcc-4.4.0/glibc-2.3.6 but is moving to
gcc-4.4.3/glibc-2.11.1.  gcc-4.4.3 with -O2 is started generating
compiler warnings in the Intrusive library when I attempt to
execute the construct() method on managed_shared_memory object.
-O0 and -O1 are still happy.  I'm wondering if anyone else has
seen similar, has suggestions on debug/fix, or does this appear
to be compiler issue?

Program snippet:
#include ""boost/interprocess/managed_shared_memory.hpp""
#include <cstdlib> //std::system
#include <cstddef>

int main(int argc, char *argv[])
{
  using namespace boost::interprocess;
  typedef std::pair<double, int> MyType;

  //Construct managed shared memory
  managed_shared_memory segment(create_only, ""MySharedMemory"", 65536);

  //Create an object of MyType initialized to {0.0, 0}
  MyType *instance = segment.construct<MyType>
      (""MyType instance"")  //name of the object
      (0.0, 0);            //ctor first argument
  return 0;
}

Compiler output:
gcc-4.4.3-glibc-2.11.1-grte/x86/bin/g++ -ld -MD -MP -g -O2 -Wall -Werror
  -fno-omit-frame-pointer -Wno-error -Wno-deprecated -fpic
  -I/home/mitzel/src/boost_1_46_0 -c -o test.o test.cc
In file included from /home/mitzel/src/boost_1_46_0/boost/intrusive/rbtree_algorithms.hpp:58,
                 from /home/mitzel/src/boost_1_46_0/boost/intrusive/detail/rbtree_node.hpp:20,
                 from /home/mitzel/src/boost_1_46_0/boost/intrusive/set_hook.hpp:20,
                 from /home/mitzel/src/boost_1_46_0/boost/intrusive/rbtree.hpp:25,
                 from /home/mitzel/src/boost_1_46_0/boost/intrusive/set.hpp:19,
                 from /home/mitzel/src/boost_1_46_0/boost/interprocess/mem_algo/rbtree_best_fit.hpp:47,
                 from /home/mitzel/src/boost_1_46_0/boost/interprocess/detail/managed_memory_impl.hpp:22,
                 from /home/mitzel/src/boost_1_46_0/boost/interprocess/managed_shared_memory.hpp:21,
                 from test.cc:1:
/home/mitzel/src/boost_1_46_0/boost/intrusive/detail/tree_algorithms.hpp:
  In static member function 'static typename NodeTraits::node_ptr
  boost::intrusive::detail::tree_algorithms<NodeTraits>::minimum(typename NodeTraits::node_ptr)
  [with NodeTraits = boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>]':
/home/mitzel/src/boost_1_46_0/boost/intrusive/detail/tree_algorithms.hpp:490:
  warning: '<anonymous>' may be used uninitialized in this function
/home/mitzel/src/boost_1_46_0/boost/intrusive/detail/tree_algorithms.hpp:
  In static member function 'static typename
  NodeTraits::node_ptr boost::intrusive::detail::tree_algorithms<NodeTraits>::maximum(typename NodeTraits::node_ptr)
  [with NodeTraits = boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>]':
/home/mitzel/src/boost_1_46_0/boost/intrusive/detail/tree_algorithms.hpp:507:
  warning: '<anonymous>' may be used uninitialized in this function
/home/mitzel/src/boost_1_46_0/boost/intrusive/detail/utilities.hpp:
  In static member function 'static void
  boost::intrusive::detail::tree_algorithms<NodeTraits>::insert_equal_check_impl(
  bool, typename NodeTraits::node_ptr, typename NodeTraits::node_ptr, NodePtrCompare,
  boost::intrusive::detail::tree_algorithms<NodeTraits>::insert_commit_data&, size_t*)
  [with NodePtrCompare = boost::intrusive::detail::key_nodeptr_comp<std::less<
  boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>::block_ctrl>,
  boost::intrusive::rbtree_impl<boost::intrusive::setopt<boost::intrusive::detail::base_hook_traits<
  boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>::block_ctrl,
  boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>,
  (boost::intrusive::link_mode_type)0u, boost::intrusive::default_tag, 3>,
  std::less<boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>::block_ctrl>,
  long unsigned int, true> > >, NodeTraits = boost::intrusive::rbtree_node_traits<boost::interprocess::offset_ptr<void>, true>]':
/home/mitzel/src/boost_1_46_0/boost/intrusive/detail/utilities.hpp:234: warning: '<anonymous>' may be used uninitialized in this function
/home/mitzel/src/boost_1_46_0/boost/intrusive/detail/utilities.hpp:234: note: '<anonymous>' was declared here


thanks for your time and any suggestions.
danny <mitzel@acm.org>"	Bugs	new	To Be Determined	intrusive	Boost 1.46.0	Problem