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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Double precision not working with -cl-std=c++"
href="https://bugs.llvm.org/show_bug.cgi?id=40603">40603</a>
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<th>Summary</th>
<td>Double precision not working with -cl-std=c++
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>8.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>OpenCL
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>drohr@jwdt.org
</td>
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<th>CC</th>
<td>anastasia.stulova@arm.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>Usage of double precision floating point works with command line argument
-cl-std=CL2.0 but not with -cl-std=c++.
Compiling with -cl-std=c++ yields the following error:
error: use of type 'double' requires cl_khr_fp64 extension to be enabled
However, enabling the cl_khr_fp64 extensions yields:
warning: unsupported OpenCL extension 'cl_khr_fp64' - ignoring
[-Wignored-pragmas]
For reference: the cl_khr_fp64 extensions works when I set a different -cl-std,
e.g. CL2.0</pre>
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