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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Linking with lld causes MCJIT to fail at runtime with 'JIT has not been linked in'."
href="https://bugs.llvm.org/show_bug.cgi?id=49123">49123</a>
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<th>Summary</th>
<td>Linking with lld causes MCJIT to fail at runtime with 'JIT has not been linked in'.
</td>
</tr>
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<th>Product</th>
<td>lld
</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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>ELF
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>lukas.bergdoll@mvtec.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, smithp352@googlemail.com
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<p>
<div>
<pre>System: x64
OS: Linux 5.10.12-arch1-1
LLVM version: 10.0.0
A project that does among other things:
```
InitializeNativeTarget();
InitializeNativeTargetAsmPrinter();
InitializeNativeTargetAsmParser();
LLVMLinkInMCJIT();
[...]
std::string error_msg;
auto exec_engine = EngineBuilder(std::unique_ptr<Module>(mod))
.setErrorStr(&error_msg)
.setEngineKind(EngineKind::JIT)
.create();
```
When using the system ld linker, the EngineBuilder create call works as
expected and produces a functioning MCJIT. However when changing CMake settings
to use lld:
```
-D CMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" \
-D CMAKE_MODULE_LINKER_FLAGS="-fuse-ld=lld" \
-D CMAKE_SHARED_LINKER_FLAGS="-fuse-ld=lld" \
```
`exec_engine` is now a nullptr, and `error_msg` is 'JIT has not been linked
in'.
---
>From what I can tell the only difference is lld, and it claims to be a drop in
replacement which it fails to be here.</pre>
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