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    <p>Yes, this keyword is no longer valid starting from C++17:<br>
          <a class="moz-txt-link-freetext" href="https://en.cppreference.com/w/cpp/keyword/register">https://en.cppreference.com/w/cpp/keyword/register</a></p>
    <p>I realize that the "why" probably doesn't help you move forth
      with your problem, so here are a couple suggestions how to get
      over it:</p>
    <ul>
      <li>Build Boost in C++14 mode with -std=c++14<br>
      </li>
      <li>Cut out "register" from the Boost source and rebuild</li>
      <li>Try a newer Boost version, it may have been fixed</li>
    </ul>
    <p>Oleg.<br>
    </p>
    <div class="moz-cite-prefix">On 2018-12-23 09:26, Craig Topper via
      cfe-dev wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAF7ks-P-MpdnpFjxzYZd3YdPh=V0QqBSSx520i+ht6eAALneYA@mail.gmail.com">
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        <div>This seems a better question for cfe-dev or cfe-users</div>
        <br clear="all">
        <div>
          <div dir="ltr" class="gmail_signature"
            data-smartmail="gmail_signature">~Craig</div>
        </div>
        <br>
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      <br>
      <div class="gmail_quote">
        <div dir="ltr">On Sat, Dec 22, 2018 at 12:23 PM Osman Zakir via
          llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org"
            moz-do-not-send="true">llvm-dev@lists.llvm.org</a>>
          wrote:<br>
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        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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            <div
style="color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif;font-size:12pt"><span>When
                trying to build Boost using LLVM, I had this error:</span></div>
            <div
style="color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif;font-size:12pt"><span>"</span></div>
            <div
style="color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif;font-size:12pt"><span>error:
                ISO C++17 does not allow 'register' storage class
                specifier [-Wregister]<br>
                <div>"</div>
                <div>I attached the project-config.jam file I used to
                  this message.  Someone please help me out (if there's
                  someone on here who can).  </div>
              </span></div>
          </div>
          _______________________________________________<br>
          LLVM Developers mailing list<br>
          <a href="mailto:llvm-dev@lists.llvm.org" target="_blank"
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          <a
            href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev"
            rel="noreferrer" target="_blank" moz-do-not-send="true">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a><br>
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
cfe-dev mailing list
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</pre>
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