<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - -fno-temp-file is broken in clang 12"
   href="https://bugs.llvm.org/show_bug.cgi?id=50033">50033</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>-fno-temp-file is broken in clang 12
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>release blocker
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Frontend
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>Zachary.Henkel@microsoft.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Creating a pch with -fno-temp-file set creates a temp file because
*RemoveFileOnSignal=*/false

Traced back to ad7aaa475e5e632242b07380ec47d2f35d077209

A simplified command line is as follows:
 clang-cl -fno-temp-file /Yc /Fpstdafx.pch /Fostdafx.obj stdafx.h

Observer in your favorite system monitor (such as procmon) that a temp file is
created.  

Without hacking up our internal fork of clang this completely blocks adoption
of clang 12.</pre>
        </div>
      </p>


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