meson: Add equivalent of configure --disable-rpath option

Discussion: https://www.postgresql.org/message-id/flat/33e957e6-4b4e-b0ed-1cc1-6335a24543ff%40enterprisedb.com

doc/src/sgml/installation.sgml

@@ -2216,7 +2216,9 @@ ninja install
       different subdirectories may render the installation non-relocatable,
       meaning you won't be able to move it after installation.
       (The <literal>man</literal> and <literal>doc</literal> locations are
-      not affected by this restriction.)
+      not affected by this restriction.)  For relocatable installs, you
+      might want to use the <literal>-Drpath=false</literal> option
+      described later.
      </para>
 
      <variablelist>
@@ -2856,6 +2858,25 @@ ninja install
       </listitem>
      </varlistentry>
 
+     <varlistentry id="configure-rpath-meson">
+      <term><option>-Drpath={ true | false }</option></term>
+      <listitem>
+       <para>
+        This option is set to true by default.  If set to false,
+        do not mark <productname>PostgreSQL</productname>'s executables
+        to indicate that they should search for shared libraries in the
+        installation's library directory (see <option>--libdir</option>).
+        On most platforms, this marking uses an absolute path to the
+        library directory, so that it will be unhelpful if you relocate
+        the installation later.  However, you will then need to provide
+        some other way for the executables to find the shared libraries.
+        Typically this requires configuring the operating system's
+        dynamic linker to search the library directory; see
+        <xref linkend="install-post-shlibs"/> for more detail.
+       </para>
+      </listitem>
+     </varlistentry>
+
      <varlistentry id="configure-binary-name-meson">
       <term><option>-D<replaceable>BINARY_NAME</replaceable>=<replaceable>PATH</replaceable></option></term>
       <listitem>