[linux-users] Re: Version definitions and dynamic loading

[Roman Duka]

Roman Duka wrote:
> Roman Duka wrote:
> 
>> Could somebody please explain to me what version definitions are used 
>> for and how they are used in ELF object/executable files.
> 
>  > ... etc
> 
> Well after searching on the net and messing about with shared libraries 
> I think I found an answer on my own question :-)
> For anybody who is interested, here is the explanation:
> 
> A good start is to read info pages (man pages are not as descriptive) on 
> "ld", linux linker, especially the section named "VERSION command". Here 
> is what the manual says:
> 
> The linker supports symbol versions when using ELF.  Symbol versions
> are only useful when using shared libraries.  The dynamic linker can use
> symbol versions to select a specific version of a function when it runs
> a program that may have been linked against an earlier version of the
> shared library.
> 
> So I created a test shared library that uses symbol versions and test 
> application that uses that library, as expected when my application 
> calls the functions which are defined for a particular version of the 
> library, that version information is propagated through
> 
Here is also a good manual which describes these things

http://docs.sun.com/db/doc/816-1386/6m7qcobl7?a=view


------
Want more information?  See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/
Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com