http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47269
--- Comment #1 from Jack Howarth <howarth at nitro dot med.uc.edu> 2011-01-13 05:23:00 UTC --- This seems impossible to implement without the addition of a logical AND to the spec language and the ability to place parentheses. We have two cases which have to be tested as true... (!g0 & !gtoggle) | (g0 & gtoggle) in order to properly decided if -dsym should be passed.
