[Boost-bugs] [Boost C++ Libraries] #7736: Boost.Units io.hpp always includes Boost.serialization and an unwanted Clang warning

Subject: [Boost-bugs] [Boost C++ Libraries] #7736: Boost.Units io.hpp always includes Boost.serialization and an unwanted Clang warning
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-11-26 18:01:47

#7736: Boost.Units io.hpp always includes Boost.serialization and an unwanted
Clang warning
------------------------------------------------------------+---------------
 Reporter:  pbristow                                        |       Owner:  steven_watanabe
     Type:  Support Requests                                |      Status:  new            
Milestone:  To Be Determined                                |   Component:  units          
  Version:  Boost 1.52.0                                    |    Severity:  Optimization   
 Keywords:  units serialization  dllexport attribute clang  |  
------------------------------------------------------------+---------------
 I note that Boost.Units io.hpp''' always''' #includes serialization (a not
 inconsiderable amount of code to parse etc).  It would be nice if
 Serialization could only be included when required (but perhaps this is
 troublesome?)

 This became apparent when compiling using Clang 3.1 (Ruben van Boxem's
 mingw32) on Netbeans 7.2 on Windows 7 when this ugly warning appeared:

 {{{

 In file included from i:/boost-trunk\boost/units/io.hpp:27:
 In file included from i:/boost-trunk\boost/serialization/nvp.hpp:34:
 In file included from i:/boost-
 trunk\boost/serialization/base_object.hpp:39:
 i:/boost-trunk\boost/serialization/void_cast_fwd.hpp:29:1: warning:
 dllexport attribute ignored
 BOOST_DLLEXPORT
 ^
 i:/boost-trunk\boost/serialization/force_include.hpp:37:43: note: expanded
 from macro 'BOOST_DLLEXPORT'
 #       define BOOST_DLLEXPORT __declspec(dllexport)
                                           ^
 <built-in>:150:38: note: expanded from macro '__declspec'
 #define __declspec(a) __attribute__((a))
                                      ^
 1 warning generated.
 }}}

 This also suggests that inappropriate dllexport attribute is being
 generated for Clang?

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7736>
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