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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - -fdebug-prefix-map is a no-op for .S files"
href="https://bugs.llvm.org/show_bug.cgi?id=38050">38050</a>
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<th>Summary</th>
<td>-fdebug-prefix-map is a no-op for .S files
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>6.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>starsid@gmail.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>When compiling assembly (.S) files with `-g`, clang does not respect
-fdebug-prefix-map to change the embedded source file path information.
Example:
```lang=sh
echo 'int main() { return 0; }' > dummy.c
clang -S -c dummy.c -o dummy.S
# Works with .c
clang -fdebug-prefix-map=$PWD= -g -c dummy.c -o dummy
strings dummy | grep $PWD
# PWD was successfully remapped.
# Does not work with .S
clang -fdebug-prefix-map=$PWD= -g dummy.S -o dummy
strings dummy | grep $PWD
# PWD is embedded in the object file.
# gcc does it correctly.
gcc -fdebug-prefix-map=$PWD= -g dummy.S -o dummy
strings dummy | grep $PWD
# PWD was successfully remapped.
```</pre>
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