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From: "dodji at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: libabigail@sourceware.org
Subject: [Bug default/30034] [libabigail] Handle library splitting
Date: Sat, 24 Jun 2023 14:32:27 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30034

--- Comment #15 from dodji at redhat dot com ---
So, in the branch "PR30034" of the git repository at
https://sourceware.org/git/?p=3Dlibabigail.git;a=3Dshortlog;h=3Drefs/heads/=
users/dodji/PR30034,
there is an initial implementation of the requested feature materialized by=
 the
patch-set which tip is at
https://sourceware.org/git/?p=3Dlibabigail.git;a=3Dcommit;h=3D0a7614bd93e56=
95157b331e7faa24fadc7ef861a.


Using the tarball that you kindly provided in attachment, (thank you for
that!), here is the I am getting:

$ ls
cmd.log  current-patch.txt  libabigail.abignore  reference  split

$ time /home/dodji/git/libabigail/PR30034/build/tools/abidiff
--follow-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


real    0m0,827s
user    0m0,765s
sys     0m0,060s=20
$

So, basically, the abidiff gained a new --follow-dependencies option that m=
akes
it compare two ABI Corpus Groups, each one made of the union of the input
binary and its dependencies found in directories specified by --deps-dir{1,=
2}.

You can have a serialized form of the ABI corpus  group considered by the t=
ool
by invoking:

$ time /home/dodji/git/libabigail/PR30034/build/tools/abidw
--follow-dependencies --deps-dir split/lib64/ split/lib64/librte_eal.so >
librte_eal.so.group.abi

real    0m0,581s
user    0m0,561s
sys     0m0,022s

$ ls
cmd.log  current-patch.txt  libabigail.abignore  librte_eal.so.group.abi=20
reference  split

$=20

I will let you test and play with the tree while I spit & polish it in the
background.  Please do not hesitate to provide me with the feedback you see
fit.

Thank you!

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