"H. J. Lu" <hjl@lucon.org> writes: > I am trying to comment out > > static GTY (()) int foo = 0; > > with > > #if 0 > static GTY (()) int foo = 0; > #endif > > But I got an error saying something like > > ./gt....h:44: error: foo undeclared here (not in a function) > > Is that expected? How can I comment it out? Yes. You can't. Why do you want to?