Re: [Mesa3d-dev] Re: libtool (was CVS and SSE)

[Sven M. H. <pe...@gm...>]

On Mon, May 21, 2001 at 10:05:03PM +0200, Marcelo E. Magallon wrote:
>  >   M = CURRENT-AGE
>  >   m = AGE
>  >   r = REVISION
> 
>  This is not generally true (it holds true for Linux, and BSD, IIRC,
>  among others)

Right. See my other post.


>  > Executables are linked using -soname=libX.so.M !
> 
>  The soname is embedded in the library (try readelf -d libfoo | grep
>  SONAME on some dynamic library on your system).  The compiler (linker,
>  really) reads this information and writes in on the object it produces
>  (grep for NEEDED instead of SONAME).  The dynamic linker reads this
>  from the object and maps it to a filename.  The dynamic linker can
>  perfom other tricks (like loading optimized versions of a library) but
>  that's outside the scope of this discussion.

Ah. Thanks for the explanation.


>  > I don't know, maybe that discovery isn't new to you, but at least I
>  > couldn't directly derive this from the libtool docs. :}
> 
>  It's not documented because it's not portable.  Some dynamic linkers
>  have more features, some less (IRIX's and AIX's, respectively IIRC).

Right, I figured it would be something like that. Nice to know for sure
though (I've personally never seen any other linker than GNU ld on Linux. :/).



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