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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 --- - Specifying an "extern module" with a non-existent path doesn't lead to an error"
   href="http://llvm.org/bugs/show_bug.cgi?id=22663">22663</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Specifying an "extern module" with a non-existent path doesn't lead to an error
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>Linux
          </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>Modules
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>klimek@google.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>$ cat /tmp/a.cppmap
module "a" {
  use "b"
}

extern module "b" "/this/does/not/exist"

$ ./bin/clang -c -x c++ -fmodules -fmodule-name=a -Xclang -emit-module
/tmp/a.cppmap
$ echo $?
0

ModuleMap.cpp:1587 just loads the module map if the file exists, and otherwise
happily goes on.</pre>
        </div>
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