Starting from 1.59.0 final release, there are undefined generic_category()
errors in internal and external modules: [1].

Instead of defining the -DBOOST_SYSTEM_NO_DEPRECATED in internal and external
modules, patch the boost to not define the deprecated stuff per default.

[1] http://paste.openstack.org/show/430509

diff -ru boost.orig/boost/system/detail/error_code.ipp boost/boost/system/detail/error_code.ipp
--- foo/misc/boost.orig/boost/system/detail/error_code.ipp	2015-01-06 17:08:27.000000000 +0100
+++ foo/misc/boost/boost/system/detail/error_code.ipp	2015-08-28 21:47:00.941340365 +0200
@@ -437,7 +437,7 @@
 } // unnamed namespace
 
 
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+# ifdef BOOST_SYSTEM_DEPRECATED
     BOOST_SYSTEM_DECL error_code throws; // "throw on error" special error_code;
                                          //  note that it doesn't matter if this
                                          //  isn't initialized before use since
diff -ru boost.orig/boost/system/error_code.hpp boost/boost/system/error_code.hpp
--- foo/misc/boost.orig/boost/system/error_code.hpp	2015-01-06 17:08:27.000000000 +0100
+++ foo/misc/boost/boost/system/error_code.hpp	2015-08-28 21:47:58.318344217 +0200
@@ -139,7 +139,7 @@
 
     } // namespace errc
 
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+# ifdef BOOST_SYSTEM_DEPRECATED
     namespace posix = errc;
     namespace posix_error = errc;
 # endif
@@ -214,7 +214,7 @@
 #endif
     //  deprecated synonyms --------------------------------------------------//
 
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+# ifdef BOOST_SYSTEM_DEPRECATED
     inline const error_category &  get_system_category() { return system_category(); }
     inline const error_category &  get_generic_category() { return generic_category(); }
     inline const error_category &  get_posix_category() { return generic_category(); }
@@ -394,7 +394,7 @@
     };
 
     //  predefined error_code object used as "throw on error" tag
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+# ifdef BOOST_SYSTEM_DEPRECATED
     BOOST_SYSTEM_DECL extern error_code throws;
 # endif
 
diff -ru boost.orig/boost/system/linux_error.hpp boost/boost/system/linux_error.hpp
--- foo/misc/boost.orig/boost/system/linux_error.hpp	2015-01-06 17:08:27.000000000 +0100
+++ foo/misc/boost/boost/system/linux_error.hpp	2015-08-28 21:47:17.172341455 +0200
@@ -89,7 +89,7 @@
       };
     }  // namespace linux_error
 
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+# ifdef BOOST_SYSTEM_DEPRECATED
     namespace Linux = linux_error;
 # endif
 
diff -ru boost.orig/boost/system/windows_error.hpp boost/boost/system/windows_error.hpp
--- foo/misc/boost.orig/boost/system/windows_error.hpp	2015-01-06 17:08:27.000000000 +0100
+++ foo/misc/boost/boost/system/windows_error.hpp	2015-08-28 21:46:39.802338946 +0200
@@ -105,7 +105,7 @@
 
     }  // namespace windows
 
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+# ifdef BOOST_SYSTEM_DEPRECATED
     namespace windows = windows_error;
 # endif