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<body><span class="vcard"><a class="email" href="mailto:david.majnemer@gmail.com" title="David Majnemer <david.majnemer@gmail.com>"> <span class="fn">David Majnemer</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - static char strange linker error"
href="https://llvm.org/bugs/show_bug.cgi?id=23177">bug 23177</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>david.majnemer@gmail.com
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>INVALID
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - static char strange linker error"
href="https://llvm.org/bugs/show_bug.cgi?id=23177#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - static char strange linker error"
href="https://llvm.org/bugs/show_bug.cgi?id=23177">bug 23177</a>
from <span class="vcard"><a class="email" href="mailto:david.majnemer@gmail.com" title="David Majnemer <david.majnemer@gmail.com>"> <span class="fn">David Majnemer</span></a>
</span></b>
<pre>Hi Daniel,
Your program is invalid because you don't specify a definition of
Foo::Something.
You need something like the following in at least one translation unit:
const char Something::Foo;
The reason why you are observing different behavior between 'char' and
'unsigned char' is due to the fact that your static data member is ODR-used in
the operator[] of the map because the map takes a char& parameter. When you
change the static data member's type to 'unsigned char', you instead get a
temporary created of the appropriate type and have it's address passed to the
map.</pre>
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