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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - error library not found"
href="https://bugs.llvm.org/show_bug.cgi?id=50597">50597</a>
</td>
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<th>Summary</th>
<td>error library not found
</td>
</tr>
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<th>Product</th>
<td>lld
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<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>MachO
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>schuett@gmail.com
</td>
</tr>
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<th>CC</th>
<td>gkm@fb.com, jezreel@gmail.com, llvm-bugs@lists.llvm.org, smeenai@fb.com
</td>
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<p>
<div>
<pre>On Big Sur I get:
: ld64.lld: error: library not found for -lSystem
ld64.lld: error: library not found for -lresolv
ld64.lld: error: library not found for -lc
ld64.lld: error: library not found for -lm
ld64.lld: error: library not found for -liconv
I believe the root cause is:
New in macOS Big Sur 11.0.1, the system ships with a built-in dynamic linker
cache of all system-provided libraries. As part of this change, copies of
dynamic libraries are no longer present on the filesystem. Code that attempts
to check for dynamic library presence by looking for a file at a path or
enumerating a directory will fail. Instead, check for library presence by
attempting to dlopen() the path, which will correctly check for the library in
the cache. (62986286)
lld currently uses fs::exists:
<a href="https://github.com/llvm/llvm-project/blob/6881f29a36a97102e5c89653a343f656231bc2f2/lld/MachO/DriverUtils.cpp#L252">https://github.com/llvm/llvm-project/blob/6881f29a36a97102e5c89653a343f656231bc2f2/lld/MachO/DriverUtils.cpp#L252</a></pre>
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