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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - static char strange linker error"
href="https://llvm.org/bugs/show_bug.cgi?id=23177">23177</a>
</td>
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<tr>
<th>Summary</th>
<td>static char strange linker error
</td>
</tr>
<tr>
<th>Product</th>
<td>lld
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>Macintosh
</td>
</tr>
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<th>OS</th>
<td>MacOS X
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>release blocker
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>daniel.liverance@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>I'm using Xcode on Apple LLVM version 6.1.0 (clang-602.0.49) based on LLVM
3.6.0svn
There is a strange linker error with the following code:
#include <stdio.h>
#include <map>
class Foo
{
public:
static const char Something = 0;
};
std::map<char, int> test_fail;
int main(int argc, const char * argv[])
{
if (Foo::Something == 0)
{
char bar = Foo::Something;
printf("Foo::Something = %d\n", bar);
printf("Foo::Something = %d\n", Foo::Something);
test_fail[Foo::Something] = 0;
}
return 0;
}
This program fails to link on the symbol Foo::Something in _main, and it's odd
because it only fails to link when using it with the std::map.
If you comment out "test_fail[Foo::Something] = 0;" it successfully links.
It will also link if you change:
static const char Something = 0;
to:
static const unsigned char Something = 0;
It will also link if you change:
std::map<char, int> test_fail;
to:
std::map<unsigned char, int> test_fail;
It will also compile if you cast the Foo::Something in the map usage like:
test_fail[(char)Foo::Something] = 0;
test_fail[(unsigned char)Foo::Something] = 0;
both will fix the linker error.
I believe this is a bug in the linker.</pre>
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