ke-generator-expressions(7)" title="cmake-generator-expressions(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">generator</span> <span class="pre">expressions</span></code></a>.</p>
<p>No two base directories for a file set may be sub-directories of each other.
This requirement must be met across all base directories added to a file set,
not just those within a single call to <code class="docutils literal notranslate"><span class="pre">target_sources()</span></code>.