v2: The GNU C Library 2.16 release plan

[Roland McGrath]

> Is there any way we can come to better consensus around the fortify warnings?

What seems appropriate for configurations that want to enable fortification
by default is that they predefine some other macro whose meaning is "set
_FORTIFY_SOURCE if optimizing", rather than predefining _FORTIFY_SOURCE
itself.  That way the features.h check can distinguish a user adding
-D_FORTIFY_SOURCE without -O from the predefinition.