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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 --- - compiler-rt config-ix.cmake missing link flag for iOS simulator"
href="https://llvm.org/bugs/show_bug.cgi?id=24864">24864</a>
</td>
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<th>Summary</th>
<td>compiler-rt config-ix.cmake missing link flag for iOS simulator
</td>
</tr>
<tr>
<th>Product</th>
<td>Build scripts
</td>
</tr>
<tr>
<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>
<tr>
<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>cmake
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>aw1621107@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>On OS X 10.11, Xcode/CLT 7.1, trunk build through homebrew using "brew install
llvm --with-clang --with-lldb --HEAD --debug --verbose" and this formula:
<a href="https://gist.github.com/aw1621107/dccde531d91349d3eaee">https://gist.github.com/aw1621107/dccde531d91349d3eaee</a>
During this build, ld refuses to link libclang_rt.asan_iossim_dynamic.dylib
when compiling the address sanitizer. Instead of looking in the iOS simulator
SDK, it goes straight to /usr/lib, resulting in the build failing with the
message "building for iOS simulator, but linking against dylib built for OS X
(architecture x86_64)"
Turns out that setting -sysroot during the link step did not seem to set the
sysroot for the ld call. I fixed this issue by adding a ld-specific sysroot
flag to projects/compiler-rt/cmake/config-ix.cmake under line 343:
-Wl,-syslibroot ${IOSSIM_SDK_DIR}
While this works on my machine, I'm not 100% sure that this will work for
everyone, as the build fails at a later point with a different error message.
In addition, it appears that this problem does not affect every OS X machine,
as some users on IRC were able to build trunk just fine.
If more information is required, I'll be happy to provide it.</pre>
</div>
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