Changes in chapter04/settingenviron.xml [a0a803c:2d6ced8]

File:

• chapter04/settingenviron.xml (modified) (1 diff)

chapter04/settingenviron.xml

@@ -196 +196 @@
   </important>
 
-  <para>
-    For many modern systems with multiple processors (or cores) the
-    compilation time for a package can be reduced by performing a "parallel
-    make" by telling the make program how many processors are available via
-    a command line option or an environment variable.  For instance, an Intel
-    Core i9-13900K processor has 8 P (performance) cores and
-    16 E (efficiency) cores, and a P core can simultaneously run two threads
-    so each P core are modeled as two logical cores by the Linux kernel.
-    As the result there are 32 logical cores in total.  One obvious way to
-    use all these logical cores is allowing <command>make</command> to spawn
-    up to 32 build jobs.  This can be done by passing the
-    <parameter>-j32</parameter> option to <command>make</command>:
-  </para>
-
-  <screen role='nodump'><userinput>make -j32</userinput></screen>
-
-  <para>
-    Or set the <envar>MAKEFLAGS</envar> environment variable and its
-    content will be automatically used by <command>make</command> as
-    command line options:
-  </para>
-
-  <screen role='nodump'><userinput>export MAKEFLAGS=-j32</userinput></screen>
-
-  <important>
-    <para>
-      Never pass a <parameter>-j</parameter> option without a number to
-      <command>make</command> or set such an option in
-      <envar>MAKEFLAGS</envar>.  Doing so will allow <command>make</command>
-      to spawn infinite build jobs and cause system stability issue.
-    </para>
-  </important>
-
-  <para>
-    To use all logical cores available for building packages in
-    <xref linkend='chapter-cross-tools'/> and
-    <xref linkend='chapter-temporary-tools'/>, set <envar>MAKEFLAGS</envar>
-    now in <filename>.bashrc</filename>:
-  </para>
-
-<screen><userinput>cat &gt;&gt; ~/.bashrc &lt;&lt; "EOF"
-<literal>export MAKEFLAGS=-j<replaceable>$(nproc)</replaceable></literal>
-EOF</userinput></screen>
-
-  <para>
-    Replace <replaceable>$(nproc)</replaceable> with the number of logical
-    cores you want to use if you don't want to use all the logical cores.
-  </para>
-
   <para>Finally, to ensure the environment is fully prepared for building the
   temporary tools, force the <command>bash</command> shell to read