<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 - OpenCL frontend fails to compile llvm clc headers with -cl-std=c++"
   href="https://bugs.llvm.org/show_bug.cgi?id=40707">40707</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>OpenCL frontend fails to compile llvm clc headers with -cl-std=c++
          </td>
        </tr>

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

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

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

        <tr>
          <th>Reporter</th>
          <td>drohr@jwdt.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>anastasia.stulova@arm.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Compiling OpenCL code with clang requires the headers from libclc library.
Otherwise, e.g. 
__kernel void test()
{
    int i = get_global_id(0);
}
yields: "implicit declaration of function 'get_global_id' is invalid in OpenCL"

Including the clc headers via
#include <clc/clc.h>
works correctly with -cl-std=CL2.0 and defines the required symbols (such as
get_global_id), but it gives plenty of compile errors with -cl-std=c++,
starting with:
/usr/include/clc/math/fract.inc:23:62: error: unknown type name 'global'
_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE fract(__CLC_GENTYPE x, global
__CLC_GENTYPE *iptr);

For reference, I am using the master branch of libclc from
<a href="http://libclc.llvm.org/">http://libclc.llvm.org/</a></pre>
        </div>
      </p>


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