<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Darwin -fsanitize=cfi -flto=thin causes raw bitcode to be emitted, instead of Mach-O-wrapped bitcode"
href="https://bugs.llvm.org/show_bug.cgi?id=32741">32741</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Darwin -fsanitize=cfi -flto=thin causes raw bitcode to be emitted, instead of Mach-O-wrapped bitcode
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ahmed.bougacha@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>r301016 enabled CFI tests using ThinLTO on Darwin, but those are failing:
ld: warning: ignoring file
/var/folders/09/r4vw4v8n5kb67jl66zvlbljw0000gn/T/lit_tmp_j2NEGY/nvcall-1477f4.o,
file was built for unsupported file format ( 0x42 0x43 0xC0 0xDE 0x35 0x14 0x00
0x00 0x05 0x00 0x00 0x00 0x62 0x0C 0x30 0x24 ) which is not the architecture
being linked (x86_64):
/var/folders/09/r4vw4v8n5kb67jl66zvlbljw0000gn/T/lit_tmp_j2NEGY/nvcall-1477f4.o
Undefined symbols for architecture x86_64:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
<a href="http://green.lab.llvm.org/green/job/clang-stage1-configure-RA_check/30480/consoleFull#-121919748349ba4694-19c4-4d7e-bec5-911270d8a58c">http://green.lab.llvm.org/green/job/clang-stage1-configure-RA_check/30480/consoleFull#-121919748349ba4694-19c4-4d7e-bec5-911270d8a58c</a>
It seems that -fsanitize=cfi somehow causes -flto=thin to emit bitcode instead
of mach-o:
$ ./bin/clang -flto=thin -fvisibility=hidden -fsanitize=cfi /tmp/t.cpp -c &&
file t.o
t.o: LLVM IR bitcode
$ ./bin/clang -flto=thin -fvisibility=hidden /tmp/t.cpp -c && file t.o
t.o: LLVM bitcode, wrapper x86_64
And it seems that ld64 doesn't accept raw bitcode.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>