<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - LLVM CMake do not work with vcpkg LibXml2 port"
href="https://bugs.llvm.org/show_bug.cgi?id=50965">50965</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>LLVM CMake do not work with vcpkg LibXml2 port
</td>
</tr>
<tr>
<th>Product</th>
<td>Build scripts
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</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>cmake
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>clemens.wasser@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>I am currently trying to build LLVM with multiple Projects enabled and with
LibXml2 on Windows.
For that I am using vcpkg and it's LibXml2 port from this pull request:
<a href="https://github.com/microsoft/vcpkg/pull/17945">https://github.com/microsoft/vcpkg/pull/17945</a> (since the current port on master
is broken)
However I am facing the following error:
---
CMake Error at
E:/git/vcpkg/installed/x64-windows-static/share/libxml2/vcpkg-cmake-wrapper.cmake:43
(target_link_libraries):
Cannot specify link libraries for target "LibXml2::LibXml2" which is not
built by this project.
Call Stack (most recent call first):
E:/git/vcpkg/scripts/buildsystems/vcpkg.cmake:725 (include)
E:/git/llvm-project/clang/CMakeLists.txt:207 (find_package)
---
The problem is that find_package for LibXml2 gets called multiple times and
that the LibXml2::LibXml2 target is immutable after the first call, which is
bad, because vcpkg-cmake-wrapper.cmake tries to modify the target nevertheless
(which causes the issue shown above):
<a href="https://github.com/Neumann-A/vcpkg/blob/10faaac739b2c2454f85414f532c58d67dc90e49/ports/libxml2/vcpkg-cmake-wrapper.cmake#L43">https://github.com/Neumann-A/vcpkg/blob/10faaac739b2c2454f85414f532c58d67dc90e49/ports/libxml2/vcpkg-cmake-wrapper.cmake#L43</a>)
Is the LibXml2::LibXml2 target maybe mistakenly exported globally?
Or couldn't you just call find_package once for LibXml2 and use that target
everywhere?</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>