--- //thirdparty/Boost/Boost/BUILD/boost/multi_index/detail/index_base.hpp	2016-03-24 15:26:43.000000000 0100
+++ //thirdparty/Boost/Boost/BUILD/boost/multi_index/detail/index_base.hpp	2017-01-13 14:18:35.000000000 0100
@@ -87,7 +87,7 @@
   typedef Value                               value_type;
 
 protected:
-  explicit index_base(const ctor_args_list&,const Allocator&){}
+  index_base(const ctor_args_list&,const Allocator&){}
 
   index_base(
     const index_base<Value,IndexSpecifierList,Allocator>&,
--- //thirdparty/Boost/Boost/BUILD/boost/optional/optional.hpp	2016-03-24 15:26:43.000000000 0100
+++ //thirdparty/Boost/Boost/BUILD/boost/optional/optional.hpp	2017-01-13 14:18:35.000000000 0100
@@ -301,7 +301,7 @@
 #ifndef  BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
 
     template<class Expr, class PtrExpr>
-    explicit optional_base ( Expr&& expr, PtrExpr const* tag )
+    optional_base ( Expr&& expr, PtrExpr const* tag )
       :
       m_initialized(false)
     {
@@ -313,7 +313,7 @@
     // Derived classes use the 'tag' to select the appropriate
     // implementation (the correct 'construct()' overload)
     template<class Expr>
-    explicit optional_base ( Expr const& expr, Expr const* tag )
+    optional_base ( Expr const& expr, Expr const* tag )
       :
       m_initialized(false)
     {
@@ -846,7 +846,7 @@
 
 
   template<class Expr>
-  explicit optional ( Expr&& expr, 
+  optional ( Expr&& expr, 
                       BOOST_DEDUCED_TYPENAME boost::disable_if_c<
                         (boost::is_base_of<optional_detail::optional_tag, BOOST_DEDUCED_TYPENAME boost::decay<Expr>::type>::value) || 
                         boost::is_same<BOOST_DEDUCED_TYPENAME boost::decay<Expr>::type, none_t>::value >::type* = 0 
--- //thirdparty/Boost/Boost/BUILD/boost/serialization/nvp.hpp	2016-03-24 15:26:43.000000000 0100
+++ //thirdparty/Boost/Boost/BUILD/boost/serialization/nvp.hpp	2017-01-13 14:18:35.000000000 0100
@@ -39,7 +39,7 @@
     public std::pair<const char *, T *>,
     public wrapper_traits<const nvp< T > >
 {
-    explicit nvp(const char * name_, T & t) :
+    nvp(const char * name_, T & t) :
         // note: redundant cast works around borland issue
         // note: added _ to suppress useless gcc warning
         std::pair<const char *, T *>(name_, (T*)(& t))