Comment 5 for bug 720782

On 22 February 2011 08:27, JussiP <email address hidden> wrote:
> Constifying is a very good thing, and something I would very much like
> to see done.
>
> A question for people who have knowledge in C ABI: is it possible to
> have something like these:
>
> void func(someStruct *foo)
> void func(const someStruct *foo)
>
> in the same dynamic library without clashes?
>

You can't have same function exported twice with different signature in C.
And change from one to another breaks API.

You can version your symbols (provide a symbols file) and add a new
function e.g.

 void func_ng(const someStruct *foo)

marked for the new api version (NB! no soname api/abi bump)

That way old binaries will still work with a new library. And new
software can use the new function.

> If yes, then the change can be made without breaking ABI by adding the
> const function and making the non-const call the const one.
>
> --
> You received this bug notification because you are a member of Cuneiform
> Linux, which is the registrant for Cuneiform for Linux.
> https://bugs.launchpad.net/bugs/720782
>
> Title:
>  Passing DIB image as const void *
>