<li><a href="#dgstructure">DejaGNU structure</a>
<ul>
<li><a href="#dgcustom">Writing new DejaGNU tests</a></li>
+ <li><a href="#FileCheck">The FileCheck utility</a></li>
<li><a href="#dgvars">Variables and substitutions</a></li>
<li><a href="#dgfeatures">Other features</a></li>
</ul>
</div>
+<!-- _______________________________________________________________________ -->
+<div class="doc_subsection"><a name="FileCheck">The FileCheck utility</a></div>
+<!-- _______________________________________________________________________ -->
+
+<div class="doc_text">
+
+<p>A powerful feature of the RUN: lines is that it allows any arbitrary commands
+ to be executed as part of the test harness. While standard (portable) unix
+ tools like 'grep' work fine on run lines, as you see above, there are a lot
+ of caveats due to interaction with Tcl syntax, and we want to make that the
+ run lines are portable to a wide range of systems. Another major problem is
+ that grep is not very good at checking to verify that the output of a tools
+ contains a series of different output in a specific order. The FileCheck
+ tool was designed to help with these problems.</p>
+
+
+<!-- http://llvm.org/cmds/FileCheck.html -->
+
+</div>
+
<!-- _______________________________________________________________________ -->
<div class="doc_subsection"><a name="dgvars">Variables and substitutions</a></div>
<!-- _______________________________________________________________________ -->