<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.pl-s
{mso-style-name:pl-s;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve been trying to build libcxx on Windows using the `-DLLVM_INCLUDE_RUNTIMES=On -DLLVM_ENABLE_RUNTIMES=”libcxx;libcxxabi”` options.<o:p></o:p></p>
<p class="MsoNormal">However, it seems that LLVMExternalProjectUtils.cmake insists on using `clang` instead of `clang-cl` on Windows, causing CMake to error out.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This patch added support for using clang-cl: <a href="https://github.com/llvm/llvm-project/commit/dc1c41fb6f096d5c3df5d58e2a6f49bb915e1c31">
https://github.com/llvm/llvm-project/commit/dc1c41fb6f096d5c3df5d58e2a6f49bb915e1c31</a><o:p></o:p></p>
<p class="MsoNormal">However, it seems that none of the CMake files under `llvm-project/llvm/runtimes` are passing `<span class="pl-s">DCMAKE_SYSTEM_NAME=Windows` when they call the functions mentioned in the patch above, a requirement for that patch to have
any effects. No follow-up patches seem to have been submitted to exploit the newly added feature.<o:p></o:p></span></p>
<p class="MsoNormal"><span class="pl-s"><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="pl-s">Has anyone experienced similar problems?<o:p></o:p></span></p>
<p class="MsoNormal"><span class="pl-s"><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="pl-s">Thanks!</span><o:p></o:p></p>
<p class="MsoNormal">--<o:p></o:p></p>
<p class="MsoNormal">Felipe<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>