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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - A `[system]` module built with `-Wdelete-non-virtual-dtor` can't suppress this warning in importers"
href="https://bugs.llvm.org/show_bug.cgi?id=39592">39592</a>
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<th>Summary</th>
<td>A `[system]` module built with `-Wdelete-non-virtual-dtor` can't suppress this warning in importers
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Modules
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>andrewjcg@gmail.com
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>I'm actually not entirely sure this is a bug, so apologies for the noise if
not.
If a module with the `[system]` attribute is built with
`-Wdelete-non-virtual-dtor`, any importers/users that use a templated function
that would otherwise trigger that warning cannot suppress it (despite building
with `-w` and despite the module being marked as `[system]`).
That said, it seems a straightforward fix is not using warnings when compiling
modules you're tagging with `[system]`, however, `[system]` appears to mute
other warnings even when applied to the module build (e.g. `-Wunused`).
Simplified repro is <a href="https://reviews.llvm.org/differential/diff/173210/">https://reviews.llvm.org/differential/diff/173210/</a>.</pre>
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