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Using g ++ how to abandon virtual class class functions

I seem to be having problems getting obsolete print alerts as functions are declared as virtual. I am using "g ++ (GCC) 4.1.1 20061011 (Red Hat 4.1.1-30)". My research shows that in gcc 4.x there may be problems regarding the obsolescence of pure virtual functions (i.e. class bueller {virtual int cameron () = 0;};) but not ... I would suggest that you would called them regular ... virtual functions. We are just on the same page ...

foo.h

class Foo { void Foo_A() __attribute__((deprecated)); //non-virtual virtual void Foo_B() __attribute__((deprecated)); //virtual virtual void Foo_C() __attribute__((deprecated)) = 0; //pure virtual };

Say I compiled this, the foo.cpp file and some main.cpp file using g ++.

1) Everything that uses Foo_A () will actually display a warning.

2) Everything that uses Foo_B () does not show a warning.

3) Everything that Foo inherits, implements Foo_C, and then uses it, no warning is displayed.

Number 1: it works, no problem.

Number 3: seems like a known bug / feature .. anything ..

There seems to be no explanation for No. 2. Perhaps this is due to number 3, although nothing that I found does not mention this.

Does anyone know if I have missed something regarding the normal functions of a virtual class class that I want to denounce?

BTW: -Wno-deprecate is NOT included in my makefiles.

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3 answers

Given this program:

 struct Foo { virtual void Foo_B() __attribute__((deprecated)); //virtual }; struct DerivedFoo : public Foo { }; int main() { DerivedFoo d; d.Foo_B(); Foo &f = d; f.Foo_B(); } void Foo::Foo_B() {}

On CentOS 5.2 (gcc 4.1.2 version 20080704 (Red Hat 4.1.2-44)) I get the same output that you describe:

 g++ deprecate.cc -o deprecate deprecate.cc: In function 'int main()': deprecate.cc:14: warning: 'Foo_B' is deprecated (declared at deprecate.cc:3)

But, on Ubuntu 10.04.1 (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5)), I get the expected result:

 g++ deprecate.cc -o deprecate deprecate.cc: In function 'int main()': deprecate.cc:14: warning: 'virtual void Foo::Foo_B()' is deprecated (declared at deprecate.cc:3) deprecate.cc:16: warning: 'virtual void Foo::Foo_B()' is deprecated (declared at deprecate.cc:3)

So, I assume that the compiler error has been fixed.

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Are you calling Foo_B () / Foo_C () with a pointer / link to Foo or a derived class? If you are using a derived class, it seems that you should also note the methods that are deprecated in it, or you will get a description that you are describing.

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Google shows an old discussion in this section on the Debian list. But nothing else comes up on this topic. Try talking about the distribution (RedHat lists, in this case).

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