Questions re Symbol versioning

Stefan (metze) Metzmacher metze at
Fri May 23 05:59:12 GMT 2008

David Collier-Brown schrieb:
> Stefan (metze) Metzmacher wrote:
>>>> It doesn't help everywhere, but it doesn't harm where it's supported.
>>>> So far the build-farm looks ok.
>> Gerald (Jerry) Carter schrieb:
>>> But it doesn't help us with versioning on platforms that
>>> don't use GNU ld right?  So we have to go through all the hoops
>>> of maintaining backwards compatibility (compatible DSO files).
>>> So what I'm missing is that this seems to make those platforms
>>> the corner cases which means they are guaranteed to break.
>>> My have to support two solutions at all ?
>> A logical next question is how does it fail when the linker
>> doesn't honor the versioning? Doe you get
>> - the first one found in the file?
>> - the last one?
>> - both if it's called more than once?
>> Another might be, can you implement it with, for example,
>> name mangling for linkers which don't support it?
>  D'oh!  I forgot the most basic question: what are the interfaces
> you're planning to change?  Several forms of mutation can be
> done cleanly without signature changes...

We don't want to change a functions yet, but we want to add new
functions to the interface which older versions of the library won't have.


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