[Bug target/14300] -pthread doesn't define _REENTRANT in preprocessor on alpha-linux

[sje at cup dot hp dot com]

-- 
Bug 14300 depends on bug 10865, which changed state.

Bug 10865 Summary: [ia64] gcc -pthread does not add -D_REENTRANT
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10865

           What    |Old Value                   |New Value
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14300