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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - -no-canonical-prefixes breaks builtin header resolution when compiling a module using a relative path"
href="https://bugs.llvm.org/show_bug.cgi?id=47209">47209</a>
</td>
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<th>Summary</th>
<td>-no-canonical-prefixes breaks builtin header resolution when compiling a module using a relative path
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>phosek@chromium.org
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>To reproduce this issue, use the following:
```
$ mkdir -p t/d && cd t
$ cat >module.modulemap <<EOF
module stdint_h [system] {
header "stdint.h"
export *
}
EOF
$ # install Clang in t/clang
$ cd d
$ ../clang/bin/clang++ -fmodules -c -x c++ -Xclang -emit-module -c
../module.modulemap -o m.pcm -fmodule-name=stdint_h -no-canonical-prefixes
<module-includes>:1:10: error: '../clang/lib/clang/12.0.0/include/stdint.h'
file not found, did you mean 'clang/lib/clang/12.0.0/include/stdint.h'?
#include "../clang/lib/clang/12.0.0/include/stdint.h"
^
1 error generated.
```
If you omit `-no-canonical-prefixes` everything compiles without errors. If you
compile from `t` (not `t/d`) everything compiles without errors, even with
`-no-canonical-prefixes`.</pre>
</div>
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