[cfe-commits] Please provide a SONAME to libclang

[Sylvestre Ledru]

Hello Rafael,

Le mercredi 11 janvier 2012 à 22:29 -0500, Rafael Ávila de Espíndola a
écrit :
> >> Why the .1? The file is just libclang.so.
> > Hmm, .0 will be fine too (I increased the number moving from 2.9 => 3.0)
> > 
> > Under debian, I am doing a symlink
> > /usr/lib/libclang.so -> libclang.so.1
> > libclang.so being provided by libclang-dev for build purposes while 
> > libclang.so.1 is provided by libclang1
> 
> May I ask way? I am not familiar with how distros handle sonames, but I
> see two cases
> 
> * libraries like liblcms that have a symbolic link and a versioned soname:
> 
> $ ls -l liblcms.so
> ... liblcms.so -> liblcms.so.1.0.19
> $ readelf -aW liblcms.so
> ... Library soname: [liblcms.so.1]
> 
> And libraries with no link and an unversioned soname:
> 
> $ readelf -aW libssl3.so
> ... Library soname: [libssl3.so]
I don't think it has to do with symlink.
SONAME are used by packagers (and our tools) to keep track of ABI
changes. It declares "internally" to the lib what is its current
version.

This URL explains that better than I do:
http://www.netfort.gr.jp/~dancer/column/libpkg-guide/libpkg-guide.html#recommendedreading

You probably already know that but it is an interesting reading:
http://apr.apache.org/versioning.html


> I don't see what you win by adding the link and the soname.
>  The clang developers are the ones in a position to break or not the backwards
> compatibility.
Of course. I am the one, as packager, to follow your chooses!

Sylvestre