<html>
    <head>
      <base href="http://llvm.org/bugs/" />
    </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 --- - clang-cl: support UseNativeEnvironment"
   href="http://llvm.org/bugs/show_bug.cgi?id=18723">18723</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>clang-cl: support UseNativeEnvironment
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </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>new bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>marci_r@web.de
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Visual C++ 2013 has a amd64-x86 cross compiler. If you add
<UseNativeEnvironment>true</UseNativeEnvironment>
to your project file, the 64-bit compiler is used for building 32-bit
applications. This option is essential if you want to compile with the Visual
C++ November 2013 CTP and use precompiled headers as you get compiler errors
otherwise.

If you try to build a project with this option with clang-cl in Visual Studio,
you get the following error:

1>C:\Program Files
(x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.CppCommon.targets(341,5): error
MSB6006: "CL.exe" exited with code -1073741701.

This is because clang-cl is a 32-bit application and Visual Studio expects a
64-bit application. To fix this, there has to be a 64-bit version of clang-cl
and the following line has to be added for the toolset.props of the LLVM-vs2013
and LLVM-vs2013_xp toolsets, expecting a 64-bit executable in
msbuild-bin\amd64_x86:

<ExecutablePath Condition="'$(UseNativeEnvironment)' ==
'true'">$(LLVMInstallDir)\msbuild-bin\amd64_x86;$(ExecutablePath)</ExecutablePath></pre>
        </div>
      </p>
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