> in terms of the "struct _res", i guess i would recommend importing that
    > as long as you're prepared to rev the shared library version number (since
    > the structure has changed size).  but if you're not going to import a more
    > modern resolver library you don't actually need that.  
   
   Um, should _res be exported to user programs?!  I think not.  That's a
   private structure internal to the resolver.
   
   bumping libc's major is a ... hairy idea.
   
   ...unless it's only exposed to programs that link w/ libresolv.  bumping
   that one is okay, I think... but this issue must be examined very carefully.



whether it is good or bad, _res is an exported symbol of libresolv.