Changeset 2db19cb for chapter08/pkgmgt.xml

Timestamp:

04/27/2021 08:07:54 AM (3 years ago)

Author:

Thomas Trepl (Moody) <thomas@…>

Branches:

ml-11.0, multilib

Children:

88bdbb7

Parents:

feed564d (diff), c461bd9 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Automatic merge of trunk into multilib

File:

• chapter08/pkgmgt.xml (modified) (1 diff)

chapter08/pkgmgt.xml

@@ -72 +72 @@
       use the new library version. You should not remove the previous
       libraries unless all the dependent packages are recompiled.</para>
-      </listitem> </itemizedlist>
+      </listitem>
+
+      <listitem> <para>If a package containing a shared library is updated,
+      and the name of library doesn't change, but the version number of the
+      library <emphasis role="bold">file</emphasis> decreases (for example,
+      the name of the library is kept named
+      <filename class='libraryfile'>libfoo.so.1</filename>,
+      but the name of library file is changed from
+      <filename class='libraryfile'>libfoo.so.1.25</filename> to
+      <filename class='libraryfile'>libfoo.so.1.24</filename>),
+      you should remove the library file from the previously installed version
+      (<filename class='libraryfile'>libfoo.so.1.25</filename> in the case).
+      Or, a <command>ldconfig</command> run (by yourself using a command
+      line, or by the installation of some package) will reset the symlink
+      <filename class='libraryfile'>libfoo.so.1</filename> to point to
+      the old library file because it seems having a <quote>newer</quote>
+      version, as its version number is larger.  This situation may happen if
+      you have to downgrade a package, or the package changes the versioning
+      scheme of library files suddenly.</para> </listitem>
+
+    </itemizedlist>
 
   </sect2>