<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 - [PCH] errors with force include explicit pch path"
   href="https://bugs.llvm.org/show_bug.cgi?id=42009">42009</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[PCH] errors with force include explicit pch path
          </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>Windows NT
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>Driver
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>trass3r@gmail.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>main.cpp:
int main() { printf("Hello\n"); }
pch.cpp:
#include "pch.h"
pch.h:
#include <stdio.h>

clang-cl -c pch.cpp  /Ycpch.h
clang-cl -c main.cpp /Yupch.h /FIpch.h
del *.obj *.pch
clang-cl -c pch.cpp  /Ycpch.h /Fppch.pch
clang-cl -c main.cpp /Yupch.h /FIpch.h
clang-cl -c main.cpp /Yupch.h /FIpch.h /Fppch.pch
del *.obj *.pch

Worked so far.

clang-cl -c pch.cpp  /Ycpch.h /Fppch.h.pch
clang-cl -c main.cpp /Yupch.h /FIpch.h /Fppch.h.pch
fatal error: #include of 'pch.h' not seen while attempting to use precompiled
header

Using the default name suddenly doesn't work anymore either:
clang-cl -c pch.cpp  /Ycpch.h /Fppch.pch
clang-cl -c main.cpp /Yupch.h /FIpch.h /Fppch.pch
fatal error: #include of 'pch.h' not seen while attempting to use precompiled
header</pre>
        </div>
      </p>


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