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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Regression with Musl after adding support for outputting to /dev/null"
href="https://bugs.llvm.org/show_bug.cgi?id=32425">32425</a>
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<th>Summary</th>
<td>Regression with Musl after adding support for outputting to /dev/null
</td>
</tr>
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<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>dima@golovin.in
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=18172" name="attach_18172" title="revert regressive commit">attachment 18172</a> <a href="attachment.cgi?id=18172&action=edit" title="revert regressive commit">[details]</a></span>
revert regressive commit
I believe that the regression was introduced with revision 291485 "Support
outputting to /dev/null."
I really don't know why is this the case, but it is proven to work. The patch
doesn't seem to affect anything with compilation process, but it does.
Symptoms:
LLVM builds fine, musl builds fine, linking with musl always fails with this
error message:
ld.lld: error: ../crt/crt1.c:(function _start_c): cannot preempt symbol
'__libc_start_main' defined in /path/to/sysroot/bin/../lib/libc.so
ld.lld: error: hello.c:(function main): cannot preempt symbol 'printf'
defined in /path/to/sysroot/bin/../lib/libc.so
clang-5.0: error: linker command failed with exit code 1 (use -v to see
invocation)
Steps to reproduce:
1. Build llvm with clang, lld and compiler-rt.
2. Build musl with resulting compiler.
3. Build a "Hello, World!" program and try to link it with musl.
It fails with anything newer than revision 291485. It will not fail if attached
patch is applied (but /dev/null as an output will also be unsupported).</pre>
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