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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [LTO] Symbol lookup error when linking with shared libraries"
href="https://llvm.org/bugs/show_bug.cgi?id=27447">27447</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[LTO] Symbol lookup error when linking with shared libraries
</td>
</tr>
<tr>
<th>Product</th>
<td>lld
</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>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</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>davide@freebsd.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>$ cat try.sh
rm -rf main-lld libshlld.so
./clang shared.cpp -o libshlld.so -shared -fPIC -fuse-ld=lld -flto
./clang main.cpp -L. -o main-lld -fuse-ld=lld -flto -lshlld
./main-lld
./main-lld: symbol lookup error: ./libshlld.so: undefined symbol: _ZSt4cout
$ cat main.cpp
int
main(void)
{
return (0);
}
[davide@localhost bin]$ cat shared.cpp
#include <iostream>
int f(); // forward declaration
int g(); // forward declaration
int x = f();
int y = g();
int f()
{
std::cout << "using 'y' (which is " << y << ")\n";
return 3*y + 7;
}
int g()
{
std::cout << "initializing 'y'\n";
return 5;
}</pre>
</div>
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