<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 - Tablegen fails when building for debug on Windows with the latest Visual Studio version."

   href="https://bugs.llvm.org/show_bug.cgi?id=46108">46108</a>

          </td>

        </tr>

        <tr>

          <th>Summary</th>

          <td>Tablegen fails when building for debug on Windows with the latest Visual Studio version.

          </td>

        </tr>

        <tr>

          <th>Product</th>

          <td>tools

          </td>

        </tr>

        <tr>

          <th>Version</th>

          <td>10.0

          </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>TableGen

          </td>

        </tr>

        <tr>

          <th>Assignee</th>

          <td>unassignedbugs@nondot.org

          </td>

        </tr>

        <tr>

          <th>Reporter</th>

          <td>jcmac@machiel.info

          </td>

        </tr>

        <tr>

          <th>CC</th>

          <td>llvm-bugs@lists.llvm.org

          </td>

        </tr></table>

      <p>

        <div>

        <pre>Using the latest Visual Studio release 16.6.0, llvm fails to build on Windows

when building for debug.

This issue is present in the 10.0.0 release as well as the 10.0.1-rc1 release,

but not in the current master branch.

llvm-tblgen.exe shows some unexpected behaviour.

See also

<a href="https://llvm.discourse.group/t/llvm-not-building-in-vusual-studio/1139/3">https://llvm.discourse.group/t/llvm-not-building-in-vusual-studio/1139/3</a>

Here is some of the erroneous output:

`>llvm-tblgen.exe: Unknown command line argument '-gen-attrs'.  Try:

'..\..\Debug\bin\llvm-tblgen.exe --help'

28>llvm-tblgen.exe: Did you mean '--stats'?

27>llvm-tblgen.exe: Unknown command line argument '-gen-attrs'.  Try:

'..\..\..\Debug\bin\llvm-tblgen.exe --help'

27>llvm-tblgen.exe: Did you mean '--stats'?

31>llvm-tblgen.exe: Unknown command line argument '-gen-opt-parser-defs'.  Try:

'..\..\..\Debug\bin\llvm-tblgen.exe --help'

31>llvm-tblgen.exe: Did you mean '--info-output-file'?

29>llvm-tblgen.exe: Unknown command line argument '-gen-searchable-tables'. 

Try: '..\..\..\Debug\bin\llvm-tblgen.exe --help'

29>llvm-tblgen.exe: Did you mean '--info-output-file'?

30>llvm-tblgen.exe: Unknown command line argument '-gen-opt-parser-defs'.  Try:

'..\..\..\Debug\bin\llvm-tblgen.exe --help'

30>llvm-tblgen.exe: Did you mean '--info-output-file'?

28>C:\Program Files (x86)\Microsoft Visual

Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(231,5):