Changeset 9a17861

Timestamp:

04/22/2021 05:38:47 PM (3 years ago)

Author:

Xi Ruoyao <xry111@…>

Branches:

11.0, 11.0-rc1, 11.0-rc2, 11.0-rc3, 11.1, 11.1-rc1, 11.2, 11.2-rc1, 11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, arm, bdubbs/gcc13, ml-11.0, multilib, renodr/libudev-from-systemd, s6-init, trunk, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/lfs-next, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/pip3, xry111/rust-wip-20221008, xry111/update-glibc

Children:

4612211, 61707b1

Parents:

24c34df

Message:

add a paragraph for "downgrading issue" in package management page

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>