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    <body><span class="vcard"><a class="email" href="mailto:richard-llvm@metafoo.co.uk" title="Richard Smith <richard-llvm@metafoo.co.uk>"> <span class="fn">Richard Smith</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - clang fails to compile source with unicode literals under -std=gnu99"
   href="https://llvm.org/bugs/show_bug.cgi?id=24188">bug 24188</a>
        <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEW
           </td>
           <td>RESOLVED
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>---
           </td>
           <td>INVALID
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - clang fails to compile source with unicode literals under -std=gnu99"
   href="https://llvm.org/bugs/show_bug.cgi?id=24188#c4">Comment # 4</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - clang fails to compile source with unicode literals under -std=gnu99"
   href="https://llvm.org/bugs/show_bug.cgi?id=24188">bug 24188</a>
              from <span class="vcard"><a class="email" href="mailto:richard-llvm@metafoo.co.uk" title="Richard Smith <richard-llvm@metafoo.co.uk>"> <span class="fn">Richard Smith</span></a>
</span></b>
        <pre>(In reply to <a href="show_bug.cgi?id=24188#c3">comment #3</a>)
<span class="quote">> C99 standard originally did not include character constants of this kind,
> but they appeared in 2011 edition of C99 standard.</span >

There is no such thing. ISO/IEC 9899:2011 is a separate standard from
ISO/IEC9899:1999, and while the former replaces the latter, it is not "an
edition of" the C99.

If you want C11 support, you need to use -std=c11 rather than -std=c99.

<span class="quote">> Are there any plans to support this feature?</span >

We already do, if you enable support for the language mode that adds it.

Anyway, resolving INVALID: if you want C11 language features that are not a
conforming extension to C99, don't turn off C11 mode (it's enabled by default
in Clang 3.7 onwards).</pre>
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