<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 - Default to C11 standard and missing __STDC_NO_THREADS__ ( windows)"
   href="https://bugs.llvm.org/show_bug.cgi?id=48704">48704</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Default to C11 standard and missing __STDC_NO_THREADS__ ( windows)
          </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>Windows XP
          </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>C
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>patrick.pelissier@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Since the switch to default to C11, compliant program fails to build **by
default** (without forcing another mode) on windows:

  #if defined(__STDC_VERSION__) && \
      (__STDC_VERSION__ >= 201102L) && \
      !defined(__STDC_NO_THREADS__)
  #  include <threads.h>
  #endif

[ build with only "clang.exe -c test.c"  ]

It is probably the same for other predefined macros.

This may be a library issue, but is it ok to default to C11 if there is known
library issue for such support?</pre>
        </div>
      </p>


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