I previously entered this to gcc-bugs:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44841 :
"It was today that I stumbled over the seemingly simple situation of tweaking
some bits of an interface class.
Upon doing that, I got an undefined reference to a vtable.
I made clean and made my application. Nothing changed. Then I checked again the
interface and didn't find anything. Then I checked all derivations. Nothing.
Of course it was just me who has been a fool for not recognising a missing
character-tuple " = 0" behind a function signature, as in:
struct IFoo {
virtual ~IFoo() {}
virtual void frob (); // <-- missing pure specifier
};
struct Foo : IFoo { virtual void frob () {} };
int main () {
IFoo *f = new Foo();
f->frob();
delete f;
}
The exact error message was
"undefined reference to `vtable for IFoo'"
As this costed me a not irrelevant amount of time, and I wouldn't describe me
as unexperienced, my proposal would be to add a suggestion in case of undefined
vtable"
Maybe a suggestion like "Did you intend to make it a
pure virtual function? Add `= 0' then. Otherwise, ensure to define the
function." could be added, which in this case would have saved me some
productivity.
--
Summary: Add suggestion to error "undefined reference to `vtable
for XXX'"
Product: binutils
Version: 2.20
Status: NEW
Severity: enhancement
Priority: P1
Component: ld
AssignedTo: unassigned at sources dot redhat dot com
ReportedBy: phresnel at gmail dot com
CC: bug-binutils at gnu dot org
http://sourceware.org/bugzilla/show_bug.cgi?id=11793
------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.
_______________________________________________
bug-binutils mailing list
bug-binutils@gnu.org
http://lists.gnu.org/mailman/listinfo/bug-binutils
