id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
2569	export macro cannot be used on same line # in different files in same translation unit	kfriddile@…	Robert Ramey	In export.hpp the BOOST_CLASS_EXPORT macro calls the BOOST_CLASS_EXPORT_GUID macro which uses the __LINE__ directive in an attempt to create a globally unique variable name.  However, if multiple headers use the aforementioned macro on the same line #, and are included in the same translation unit, compilation will fail due to variable redefinition.  This scenario isn't unlikely, as I had three conflicting headers out of the five I included in a single cpp.  I have attached a patch in unified diff format that fixes this issue for me, but has not been run through any unit tests.	Patches	closed	Boost 1.38.0	serialization	Boost 1.37.0	Problem	fixed