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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - lld error message for undefined symbol lacks information about visibility"
href="https://bugs.llvm.org/show_bug.cgi?id=40770">40770</a>
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</tr>
<tr>
<th>Summary</th>
<td>lld error message for undefined symbol lacks information about visibility
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mh+llvm@glandium.org
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>```
$ cat foo.c
__attribute__((visibility("hidden"))) void* getdate(char*);
void* foo(char* s) {
return getdate(s);
}
$ clang -fuse-ld=lld -shared -fPIC foo.c -o foo.so
ld.lld: error: undefined symbol: getdate
<span class="quote">>>> referenced by foo.c
>>> /tmp/foo-717a38.o:(foo)</span >
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```
GNU ld.bfd and gold both report the fact the symbol is hidden in their error
message:
```
$ clang-7 -fuse-ld=ld -shared -fPIC foo.c -o foo.so
/usr/bin/ld: /tmp/foo-8f3391.o: in function `foo':
foo.c:(.text+0x11): undefined reference to `getdate'
/usr/bin/ld: foo.so: hidden symbol `getdate' isn't defined
/usr/bin/ld: final link failed: bad value
clang: error: linker command failed with exit code 1 (use -v to see invocation)
$ LANG=C clang-7 -fuse-ld=gold -shared -fPIC foo.c -o foo.so
/usr/bin/ld.gold: error: hidden symbol 'getdate' is not defined locally
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```</pre>
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