Improve compatibility with gcc-4.2.1

bob/learn/boosting/lut_machine.cpp

 
 #include "main.h"
+#include <boost/type_index.hpp>
+#include <boost/functional/hash.hpp>
 
 static auto lutMachine_doc = bob::extension::ClassDoc(
   "LUTMachine",
@@ -408,7 +410,7 @@ bool init_LUTMachine(PyObject* module)
   LUTMachineType.tp_methods = lutMachine_Methods;
 
   // register machine
-  if (!registerMachineType(typeid(bob::learn::boosting::LUTMachine).hash_code(), &lutMachineCreate))
+  if (!registerMachineType(boost::typeindex::type_id<bob::learn::boosting::LUTMachine>().hash_code(), &lutMachineCreate))
     return false;
 
   // check that everyting is fine

bob/learn/boosting/stump_machine.cpp

 
 #include "main.h"
+#include <boost/type_index.hpp>
+#include <boost/functional/hash.hpp>
 
 static auto stumpMachine_doc = bob::extension::ClassDoc(
   "StumpMachine",
@@ -410,7 +412,7 @@ bool init_StumpMachine(PyObject* module)
   StumpMachineType.tp_methods = stumpMachine_Methods;
 
   // register machine
-  if (!registerMachineType(typeid(bob::learn::boosting::StumpMachine).hash_code(), &stumpMachineCreate))
+  if (!registerMachineType(boost::typeindex::type_id<bob::learn::boosting::StumpMachine>().hash_code(), &stumpMachineCreate))
     return false;
 
   // check that everyting is fine

bob/learn/boosting/weak_machine.cpp

 
 #include "main.h"
+#include <boost/type_index.hpp>
+#include <boost/functional/hash.hpp>
 
 static std::map<size_t,CreateFunction> machineFactory;
 
@@ -13,7 +15,7 @@ bool registerMachineType(size_t type_hash, CreateFunction creator_function){
 }
 
 PyObject* createMachine(boost::shared_ptr<bob::learn::boosting::WeakMachine> machine){
-  size_t type_hash = typeid(*machine).hash_code();
+  size_t type_hash = boost::typeindex::type_id_runtime(*machine).hash_code();
   if (machineFactory.find(type_hash) == machineFactory.end()){
     PyErr_Format(PyExc_TypeError, "The given machine hash %zu has not been registered.", type_hash);
     return NULL;
@@ -60,7 +62,7 @@ bool init_WeakMachine(PyObject* module){
 
   // register creator function
   // register machine
-  if (!registerMachineType(typeid(bob::learn::boosting::WeakMachine).hash_code(), &weakMachineCreate))
+  if (!registerMachineType(boost::typeindex::type_id<bob::learn::boosting::WeakMachine>().hash_code(), &weakMachineCreate))
     return false;
 
   // check that everyting is fine

[Manuel Günther]

Although this commit is more than a year old, I have just figured out that I have an issue with it. This requires functionality introduced in Boost version 1.60.0. The default Ubuntu 14.04 distribution only comes with Boost version 1.54.0.

This requirement is not mentioned anywhere. I know that people should use the conda installation, but this commit disallows to use pip on Ubuntu 14.04.