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    <head>
      <base href="http://llvm.org/bugs/" />
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    <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: '@' args after /link should not be expanded to response files"
   href="http://llvm.org/bugs/show_bug.cgi?id=20597">20597</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>clang-cl: '@' args after /link should not be expanded to response files
          </td>
        </tr>

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

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

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </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>rafaelauler@gmail.com
          </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>The "/base" flag of MSVC's linker.exe (see
<a href="http://msdn.microsoft.com/en-us/library/f7f5138s.aspx">http://msdn.microsoft.com/en-us/library/f7f5138s.aspx</a>) accepts two forms:

/base:{address[,size]}

or

/base:@filename,key

The latter construction is problematic for clang because of the '@' character.
In this case, '@' is not a response file, but a list of key-value pairs that
link.exe can read to establish the base address. However, if a user tries to
pass this argument to the linker via clang-cl, she would be forced to use:

clang-cl /link /base:@filename,key

In this case, clang commandline utilities will wrongly expand the '@' args to a
response file before the clang arg parser kicks in.

This bug could occur in theory, but I am not sure if it occurs in practice. I
am filing it here to keep track of it.</pre>
        </div>
      </p>
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