systemd: Fix runtime issues exploited by GCC 13 (#5254)

Switch to "meson setup" from the plain "meson" by the way.

chapter08/systemd.xml

@@ -40,6 +40,19 @@
   <sect2 role="installation">
     <title>Installation of systemd</title>
 
+    <para>
+      Remove several inappropriate uses of the <literal>pure</literal>
+      attribute or they'd cause runtime issues when the package is built
+      with GCC 13 or later:
+    </para>
+
+<screen><userinput remap='pre'>sed '/bus_message_type_from_string/s/_pure_//' \
+    -i src/libsystemd/sd-bus/bus-internal.h    &amp;&amp;
+sed '/devt_hash_func/s/_pure_//'               \
+    -i src/basic/hash-funcs.h                  &amp;&amp;
+sed '/job_get_timeout/s/_pure_//'              \
+    -i src/core/job.h</userinput></screen>
+
     <para>Remove two unneeded groups,
     <systemitem class="groupname">render</systemitem> and
     <systemitem class="groupname">sgx</systemitem>, from the default udev
@@ -53,7 +66,8 @@
 <screen><userinput remap="configure">mkdir -p build
 cd       build
 
-meson --prefix=/usr                 \
+meson setup \
+      --prefix=/usr                 \
       --buildtype=release           \
       -Ddefault-dnssec=no           \
       -Dfirstboot=false             \