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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Missing -Wunused-variable warning for static variable in header"
href="https://bugs.llvm.org/show_bug.cgi?id=43299">43299</a>
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<th>Summary</th>
<td>Missing -Wunused-variable warning for static variable in header
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>efriedma@quicinc.com
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
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<pre>Testcase:
foo.h:
static int x;
foo.c:
#include "foo.h"
gcc -Wall produces "warning: ‘x’ defined but not used [-Wunused-variable]".
clang -Wall produces no warning.
This is currently getting suppressed by Sema::ShouldWarnIfUnusedFileScopedDecl,
I think. I think the reasoning here is that we don't want to emit warnings for
static constants which are included from a header. Not sure if that reasoning
makes sense for non-const variables.
Apparently I was the last one who touched this, in r190382? I don't remember
that at all.</pre>
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