[Bug default/30034] [libabigail] Handle library splitting

["dodji at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=30034

--- Comment #19 from dodji at redhat dot com ---
(In reply to David Marchand from comment #17)
> Once I disable CTF support, it can compile fine.
> 
> So I ran DPDK full ABI check:
> 
> Before (w/o follow dependencies):
> real	0m2,951s
> user	0m22,876s
> sys	0m3,724s
> 
> After (with follow dependencies):
> real	0m21,659s
> user	3m4,138s
> sys	1m52,617s
> 
> I did not look too much into it yet, but it seems significantly heavier.

Hmmh, I am wondering if you have *all* the dependencies of the library,
including all system libraries and everything (like libc etc) in the
dependencies directory specified by --deps-dir{1,2}.  If so, then it's normal
that things are much heavier.

To know what dependencies are taken into account account by abidiff, I have
just added a --list-dependencies option to abidiff in the branch.  Could you
please provide me with the list of deps so that we have an idea?

Here is how the --list-dependencies option can be used:



        $ time /home/dodji/git/libabigail/PR30034/build/tools/abidiff
--follow-dependencies --list-dependencies --suppr libabigail.abignore
--no-added-syms --headers-dir1 reference/include --headers-dir2 split/include
--deps-dir1 reference/lib64 --deps-dir2 split/lib64
reference/lib64/librte_eal.so split/lib64/librte_eal.so
        Functions changes summary: 0 Removed, 0 Changed (1 filtered out), 0
Added (12 filtered out) functions
        Variables changes summary: 0 Removed, 0 Changed, 0 Added variable

        /home/dodji/git/libabigail/PR30034/build/tools/.libs/lt-abidiff:
dependencies of 'reference/lib64/librte_eal.so':
                reference/lib64/librte_kvargs.so.23,
reference/lib64/librte_telemetry.so.23
        /home/dodji/git/libabigail/PR30034/build/tools/.libs/lt-abidiff:
dependencies of 'split/lib64/librte_eal.so':
                split/lib64/librte_kvargs.so.23, split/lib64/librte_log.so.23,
split/lib64/librte_telemetry.so.23

        real    0m0,662s
        user    0m0,638s
        sys     0m0,026s
        $

Thanks.

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