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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - cmake build of compiler-rt on Mac fails when LDFLAGS are set"
href="http://llvm.org/bugs/show_bug.cgi?id=20668">20668</a>
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<th>Summary</th>
<td>cmake build of compiler-rt on Mac fails when LDFLAGS are set
</td>
</tr>
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<th>Product</th>
<td>compiler-rt
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</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>compiler-rt
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>hans@chromium.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>We're trying to switch to using CMake for Chromium's Clang build. We do
bootstrap builds: first we build clang and libc++, then we use those to build
Clang again.
Steps to reproduce:
$ LDFLAGS="-L/work/llvm/build.release/lib" cmake -GNinja
-DCMAKE_BUILD_TYPE=Release
-DCMAKE_C_COMPILER=/work/llvm/build.release/bin/clang
-DCMAKE_CXX_COMPILER=/work/llvm/build.release/bin/clang++
-DCMAKE_CXX_FLAGS="-stdlib=libc++ -nostdinc++
-I/work/llvm/projects/libcxx/include" $LLVM_SRC_DIR
$ ninja
...
ld: building for iOS Simulator, but linking against dylib built for MacOSX file
'/work/llvm/build.release/lib/libc++.dylib' for architecture x86_64
The problem is that our LDFLAGS end up in the link lines also for the
cross-compiled runtimes, e.g. for iossim or i386.
We'll work around this by building compiler-rt in a separate tree and not
setting LDFLAGS, but it's not ideal.</pre>
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</p>
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