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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 - `#pragma once` doesn't work in a ciopfs mount if the header is included through two different cases"
href="https://bugs.llvm.org/show_bug.cgi?id=34931">34931</a>
</td>
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<tr>
<th>Summary</th>
<td>`#pragma once` doesn't work in a ciopfs mount if the header is included through two different cases
</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>
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<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</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>nicolasweber@gmx.de
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>$ mkdir icase icase.cp
$ ciopfs icase.cp/ icase
$ cat icase/File.h
#pragma once
struct S {};
$ cat test.cc
#include "file.h"
#include "File.h"
$ third_party/llvm-build/Release+Asserts/bin/clang -c test.cc -I icase
In file included from test.cc:2:
icase/File.h:3:8: error: redefinition of 'S'
struct S {};
^
icase/file.h:3:8: note: previous definition is here
struct S {};
^
1 error generated.
This shouldn't error out.
It works fine with a real FAT mount:
$ fallocate -l 10m icase.disk
$ mkfs.vfat icase.disk
mkfs.fat 3.0.26 (2014-03-07)
$ mkdir icase.fat
$ sudo mount icase.disk icase.fat -t vfat -o loop,owner,group,umask=000
[sudo] password for thakis:
$ cp icase/File.h icase.fat/
$ cat icase.fat/File.h
#pragma once
struct S {};
$ third_party/llvm-build/Release+Asserts/bin/clang -c test.cc -I icase.fat
test.cc:1:10: warning: non-portable path to file '"File.h"'; specified path
differs in case from file name on disk [-Wnonportable-include-path]
#include "file.h"
^~~~~~~~
"File.h"
1 warning generated.
It'd be cool if this worked with ciopfs too, since that doesn't need root to
use.</pre>
</div>
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