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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - "--sysroot /" mess up overlaid VFS"
href="https://llvm.org/bugs/show_bug.cgi?id=27909">27909</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>"--sysroot /" mess up overlaid VFS
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</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>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>fs.output@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Virtual file system cannot find overlaid file if "--sysroot /" is specified.
Way to reproduce:
$ cat overlay.yml
{
"version": 0,
"use-external-names": false,
"roots": [
{
"type": "file",
"name": "/usr/include/stdio_vfs.h",
"external-contents": "/usr/include/stdio.h"
}
]
}
$ cat foo.c
#include <stdio_vfs.h>
int main() {
printf("foo");
}
$ clang -ivfsoverlay overlay.yml foo.c # NO PROBLEM
$ clang --sysroot / -ivfsoverlay overlay.yml foo.c
foo.c:1:10: fatal error: 'stdio_vfs.h' file not found
#include <stdio_vfs.h>
^
1 error generated.
$</pre>
</div>
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