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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 - cmake Minsizerel with LTO fails on Linux"
href="https://bugs.llvm.org/show_bug.cgi?id=42101">42101</a>
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<th>Summary</th>
<td>cmake Minsizerel with LTO fails on Linux
</td>
</tr>
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<th>Product</th>
<td>Build scripts
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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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>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>cmake
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>milind@uber.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Configure llvm project with Minsizerel and enable LTO and set clang/clang++ as
the compiler and LLD as the linker (example below).
cmake -DCMAKE_BUILD_TYPE=Minsizerel -DLLVM_ENABLE_LTO=Full
-DLLVM_ENABLE_PROJECTS=clang -DCMAKE_C_COMPILER=clang
-DCMAKE_CXX_COMPILER=clang++ -DLLVM_ENABLE_LLD=1 -G "Ninja" ../llvm
The build fails with the following error:
ld.lld: error: -plugin-opt=Os: number expected, but got 's'
clang-9: error: linker command failed with exit code 1 (use -v to see
invocation)
Clearly, the -Os flag passed to the linker is not getting recognized. If the
linker does not support -Os, the build scripts should make sure that they do
not pass -Os down to the linker.</pre>
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