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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 --- - chicken-and-egg problem building libc++ as the only STL on a system" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23677&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=AFd8pplI7lOMFv1xORKYGTnzBc6k8RlRZiMTYGIaqb8&s=Owulg_SiEYcI-46Me4evHGc2c3_v6V6T9AmU2UXDaWk&e=">23677</a>
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<th>Summary</th>
<td>chicken-and-egg problem building libc++ as the only STL on a system
</td>
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<th>Product</th>
<td>Build scripts
</td>
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<th>Version</th>
<td>trunk
</td>
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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>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>cmake
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>bero@linaro.org
</td>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Trying to build libc++ and libc++abi for a system that doesn't have any STL
implementation installed before fails because of cmake's checks for a working
C++ compiler -- CMakeTestCXXCompiler.cmake tries to verify there's a working
C++ compiler by compiling a small application (and implicitly linking it to an
STL -- which isn't needed to build libc++abi/libc++).
The check for a working C++ compiler should probably be replaced with a simpler
check that doesn't require linking to a pre-existing
libc++/libstdc++/libc++abi/libsupc++.</pre>
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