[Boost-bugs] [Boost C++ Libraries] #11593: undocumented export problem

Subject: [Boost-bugs] [Boost C++ Libraries] #11593: undocumented export problem
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-08-27 14:36:03

#11593: undocumented export problem
------------------------------+---------------------------
 Reporter:  mstarzycki@…      |      Owner:  ramey
     Type:  Feature Requests  |     Status:  new
Milestone:  To Be Determined  |  Component:  serialization
  Version:  Boost 1.58.0      |   Severity:  Cosmetic
 Keywords:  serialization     |
------------------------------+---------------------------
 when I started using the serialisation I had a problem with duplicated
 symbols being produced by
 BOOST_CLASS_EXPORT_GUID called twice from different compilation units.
 I have not used the macro as said in tutorial in the definition of class
 but thought the .h file will be a better place for it.

 I think it would be great if either one of those would happen:
 - the problem with duplicated guid if the BOOST_CLASS_EXPORT_GUID is
 called twice from different CU
 - the prevention mechanism would be incorporated in macro (for instance if
 the guid is registered with a same class, second macro is expanded into
 nothing)

 If the 2nd option is impossible if the documentation would explicitly say
 that such code:
 duplicate symbol __ZN5boost7archive6detail12extra_detail9init_guid is the
 result of registering class twice
 it could save some time with investigation.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11593>
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