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<base href="https://bugs.llvm.org/">
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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 - llvm-ar works wrong with thin archives containing object files of same name"
href="https://bugs.llvm.org/show_bug.cgi?id=45661">45661</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>llvm-ar works wrong with thin archives containing object files of same name
</td>
</tr>
<tr>
<th>Product</th>
<td>lld
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<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>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>qwertytmp1@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, smithp352@googlemail.com
</td>
</tr></table>
<p>
<div>
<pre>For simplicity, I've prepared several bash files designed to be some sort of
PoC.
0.prepare_object_files.sh
```
#!/bin/bash
mkdir -p keyboard
mkdir -p mouse
touch keyboard/click.o
touch mouse/click.o
```
1.create_thin_archive.sh
```
#!/bin/bash
# set 1st argument as binutil's ar or llvm-ar
AR="$1"
rm -f mouse/built-in.o
rm -f keyboard/built-in.o
rm -f built-in.o
$AR -rcST mouse/built-in.o mouse/click.o \
&& \
$AR -rcST keyboard/built-in.o keyboard/click.o \
&& \
$AR -rcST built-in.o mouse/built-in.o keyboard/built-in.o \
&& \
cat built-in.o
```
To prepare environment (.o files and folders) run:
```
./0.prepare_object_files.sh
```
After this, run PoC with binutil's ar:
```
./1.create_thin_archive.sh ar
```
we'll get following output:
```
!<thin>
// 34 `
mouse/click.o/
keyboard/click.o/
...
```
After we run PoC with llvm-ar:
```
./1.create_thin_archive.sh llvm-ar
```
we'll get following output:
```
!<thin>
// 18 `
click.o/
click.o/
...
```
And here is a problem.
Both click.o files located at the same directory level inside of thin archive,
generated by llvm-ar.</pre>
</div>
</p>
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