tree b3849899f74581f5400aa585875f6fb4434dca02
parent 7baff64eb362ab8c3e0b821dd066ea80fdef4946
author Reid Kleckner <reid@kleckner.net> 1369058557 +0000
committer Reid Kleckner <reid@kleckner.net> 1369058557 +0000

Implement __declspec(selectany) under -fms-extensions

selectany only applies to externally visible global variables.  It has
the effect of making the data weak_odr.

The MSDN docs suggest that unused definitions can only be dropped at
linktime, so Clang uses weak instead of linkonce.  MSVC optimizes away
references to constant selectany data, so it must assume that there is
only one definition, hence weak_odr.

Reviewers: espindola

Differential Revision: http://llvm-reviews.chandlerc.com/D814

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@182266 91177308-0d34-0410-b5e6-96231b3b80d8