On 8/12/2011 1:28 PM, Adam Jackson wrote:
> On 8/12/11 12:28 PM, Matthew Garrett wrote:
>> On Fri, Aug 12, 2011 at 05:25:17PM +0100, Bryn M. Reeves wrote:
>>
>>> Third party code built against -devel and depending only on the SONAME is fine
>>> in this situation as it sticks to the published ABI. In-tree code that plays
>>> with non-ABI symbols will break and so may need a stricter dep.
>>
>> It is in this situation, but there are other situations where depending
>> on the SONAME will cause breakage. If libfoo 1.1 adds a new symbol,
>> anything built against it may fail to run against libfoo 1.0. But how
>> will you know that in advance if all you have in your dependencies is
>> the SONAME?
>
> In fairness, this is why rpm elaborates soname dependencies to also
> include symbol versions. It's a pity that symbol versions are so
> painful to use that really only glibc makes any effort to do it.
libibverbs uses symbol versions quite nicely.
> Hilariously gcc _does_ let you specify symbol version in a __attribute__
> tag, but only on HP/UX on ia64. Thanks for that.
>
> - ajax
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