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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Visual Studio LLVM toolchain clang-cl --coverage option and linker errors"
href="https://bugs.llvm.org/show_bug.cgi?id=40877">40877</a>
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<th>Summary</th>
<td>Visual Studio LLVM toolchain clang-cl --coverage option and linker errors
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<th>Product</th>
<td>new-bugs
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>neumann@imt.uni-luebeck.de
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>So I played with the --coverage option for clang-cl and found that my test
projects where not linking due to missing symbols.
After a bit of search for the symbols I found out that I need to link against
"clang_rt.profile-x86_64.lib". After doing that linking works fine. The problem
however is that linking to the file requires a full path. In my CMake file the
command looks like:
<span class="quote">> target_link_libraries(TestObjLib INTERFACE "\$(LLVMInstallDir)\\lib\\clang\\${CMAKE_CXX_COMPILER_VERSION}\\lib\\windows\\clang_rt.profile-x86_64.lib")</span >
Personally I would expect one of the following behaviors
a) --coverage automatically adds "clang_rt.profile-x86_64.lib" to the required
dependencies
or
b) I have to manually add "clang_rt.profile-x86_64.lib" as a dependency but
only that and not the full path.
<span class="quote">> target_link_libraries(TestObjLib INTERFACE clang_rt.profile-x86_64.lib)</span >
should be enough
This obviously requires the LLVM toolset in VS to add
\$(LLVMInstallDir)\\lib\\clang\\<CLANG_VERSION_PLACEHOLDER>\\lib\\windows\\ to
the library paths.
Other minor details:
clang-cl -help does not list the --coverage option</pre>
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