Couple of the FIXME's in c-decl.c:
/* A conflicting function declaration for a predeclared
function that isn't actually built in. Objective C uses
these. The new declaration silently overrides everything
but the volatility (i.e. noreturn) indication. See also
below. FIXME: Make Objective C use normal builtins. */
/* Two exceptions to the rule. If olddecl is an extern
inline, or a predeclared function that isn't actually
built in, newdecl silently overrides olddecl. The latter
occur only in Objective C; see also above. (FIXME: Make
Objective C use normal builtins.) */
/* FIXME: Objective-C has weird not-really-builtin functions
which are supposed to be visible automatically. They wind up
in the external scope because they're pushed before the file
scope gets created. Catch this here and rebind them into the
file scope. */
--
Summary: objc needs to use normal builtins for functions it
declares
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Keywords: FIXME
Severity: normal
Priority: P3
Component: objc
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pinskia at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24777
