On 01/19/2018 11:07 PM, Alois Mahdal wrote:
Hi Fedora!
TL;DR: What do experienced C/C++ packagers think about this PR,
considering potential future appearance in Fedora?
https://github.com/naelstrof/slop/pull/94
Using the project version for soname is usually a bad idea, because
soname is related to ABI compatibility, while project releases are not.
If you upgrade a package containing a shared library with an soname
depending on the project version, you'll break the compatibility with
compiled programs using the shared library, even if the ABI has not
effectively changed.
That's why you better avoid changing the soname when not needed.
Please note also that setting an soname is generally a developer's task,
not a packager one.
Libtool implements a "version info" feature from which the soname is
derived. The derivation itself is platform-dependent.
There's some hints and explanation in libtool doc:
https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
With this convention, the real soname computation can be performed
properly on each platform, depending on the system supported ABI
compatibility.
See also my comment for the curl project (uses libtool) at
https://curl.haxx.se/mail/lib-2010-02/0130.html
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