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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Unconditionally passed `-lto_library` to the linker on Darwin confused by symlinks"
href="https://llvm.org/bugs/show_bug.cgi?id=30811">30811</a>
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<th>Summary</th>
<td>Unconditionally passed `-lto_library` to the linker on Darwin confused by symlinks
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>Macintosh
</td>
</tr>
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<th>OS</th>
<td>MacOS X
</td>
</tr>
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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>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>howarth.mailing.lists@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The change <a href="https://reviews.llvm.org/rL285254">https://reviews.llvm.org/rL285254</a> to unconditionally pass
`-lto_library` to the linker on Darwin is confused by the use of compiler
symlinks.
This approach doesn't work if the user installs clang in a buried subdirectory
such as /sw/opt/llvm-4.0 but accesses the compilers via a /sw/bin/clang-4.0
symlink pointing at /sw/opt/llvm-4.0/bin/clang-4.0...
$ /sw/bin/clang-4.0 -flto himenoBMTxpa.c
clang-4.0: warning: libLTO.dylib relative to clang installed dir not found;
using 'ld' default search path instead [-Wliblto]
...
"/usr/bin/ld" -demangle -object_path_lto
/var/folders/vh/xthx1f251nqfj804049zl1wm0000gn/T/cc-083c59.o -no_deduplicate
-dynamic -arch x86_64 -macosx_version_min 10.11.0 -o a.out
/var/folders/vh/xthx1f251nqfj804049zl1wm0000gn/T/himenoBMTxpa-34b8ea.o -lSystem
/sw/opt/llvm-4.0/bin/../lib/clang/4.0.0/lib/darwin/libclang_rt.osx.a
$ /sw/opt/llvm-4.0/bin/clang-4.0 -flto himenoBMTxpa.c -v
...
"/usr/bin/ld" -demangle -object_path_lto
/var/folders/vh/xthx1f251nqfj804049zl1wm0000gn/T/cc-afbbef.o -lto_library
/sw/opt/llvm-4.0/lib/libLTO.dylib -no_deduplicate -dynamic -arch x86_64
-macosx_version_min 10.11.0 -o a.out
/var/folders/vh/xthx1f251nqfj804049zl1wm0000gn/T/himenoBMTxpa-44b09e.o -lSystem
/sw/opt/llvm-4.0/bin/../lib/clang/4.0.0/lib/darwin/libclang_rt.osx.a</pre>
</div>
</p>
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