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<p>I tried the following command for regular C source files:</p>

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<pre style="" class="lang-cpp prettyprint prettyprinted"><code><span class="pln">clang</span><span class="pun">-3.5</span><span class="pln"> </span><span class="pun">-</span><span class="pln">S </span><span class="pun">-</span><span class="pln">emit</span><span class="pun">-</span><span class="pln">llvm hello</span><span class="pun">.</span><span class="pln">c </span><span class="pun">-</span><span class="pln">o </span><span class="pun">-</span><span class="pln"> </span><span class="pun">|</span><span class="pln"> opt </span><span class="pun">-</span><span class="pln">analyze </span><span class="pun">-</span><span class="pln">dot</span><span class="pun">-</span><span class="pln">callgraph</span></code></pre>

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<p>and it worked.</p>

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<p>Now, I'm trying to do the same with linux device driver usbmouse.c (linux-4.1.1/drivers/hid/usbhid/). I tried the following make command:</p>

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<p>make CC=clang-3.5 SUBDIRS=drivers/hid/usbhid/ CONFIG_USB_MOUSE=m modules</p>

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<p>It gave several warnings, but nevertheless, looked like it compiled.</p>

<p>Could anybody please guide me on how I can modify the Makefile so as to generate callgraphs?<br>

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<p>Thanks</p>

<p>Regards<br>

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<b><font face="Times New Roman, Times, serif">Naveen </font></b></div>

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