<p></p>
<p>Thank you very much for your help, Subbu. So now I ran exactly your two commands, but first, the build failed because it was missing <code>clang</code>. Do I assume correctly that the following dependency should be mentioned anywhere in the repository?</p>
<div class="highlight highlight-source-shell"><pre>sudo apt-get -y install clang</pre></div>
<p>However, after installing clang and trying again, the build still fails.</p>
<p>The output contains the following errors:</p>
<ul>
<li>
<pre><code>error: unknown warning option '-Wno-unused-but-set-variable'; did you mean '-Wno-unused-const-variable'? [-Werror,-Wunknown-warning-option]
</code></pre>
</li>
<li>
<pre><code>/mnt/c/Users/Christoph/OneDrive/Dokumente/Squeak/Christoph/git/opensmalltalk-vm/platforms/Cross/plugins/B3DAcceleratorPlugin/B3DAcceleratorPlugin.h:14:13: fatal error: 
/mnt/c/Users/Christoph/OneDrive/Dokumente/Squeak/Christoph/git/opensmalltalk-vm/platforms/Cross/plugins/B3DAcceleratorPlugin/B3DAcceleratorPlugin.h:14:13: fatal error: 'GL/gl.h' file not found
#   include <GL/gl.h>
            ^~~~~~~~~
1 error generated.
Makefile:179: recipe for target 'B3DAcceleratorPlugin.lo' failed
make[1]: *** [B3DAcceleratorPlugin.lo] Error 1
Makefile:543: recipe for target 'B3DAcceleratorPlugin.la' failed
make: *** [B3DAcceleratorPlugin.la] Error 2
</code></pre>
</li>
<li>Additionally, I am getting a large number of 177 warnings, which are probably not so important?</li>
</ul>
<p>Could you tell me where I can get the <code>gl.h</code> header?</p>

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