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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Driver does not detect C++ headers if GCC configured with --with-gxx-include-dir"
href="http://llvm.org/bugs/show_bug.cgi?id=19577">19577</a>
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<th>Summary</th>
<td>Driver does not detect C++ headers if GCC configured with --with-gxx-include-dir
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.4
</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>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Driver
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
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<tr>
<th>Reporter</th>
<td>sdvormwa@mtu.edu
</td>
</tr>
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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>GCC has a configuration option (--with-gxx-include-dir) that can be used to set
where the C++ headers get installed. If this is set to anything other than
$PREFIX/include/c++, the clang driver does not correctly find these headers
even if it finds the GCC toolchain. For example, Cray's GCC packages are
configured with --with-gxx-incude-dir=$PREFIX/include/g++ causing clang's
driver to be incompatible with them.
There are a bunch of existing special cases in
Linux::AddClangCXXStdlibIncludeArgs(), but it'd be nice if instead there were a
build option (other than patching the source by hand...) that could be used to
tell the clang driver where to search for headers so distributions/users could
tell the driver exactly where to look if necessary. I unfortunately am
prohibited by my employer from contributing to clang/llvm, so I can't provide
the local changes I made to do this, but the changes are minimal.</pre>
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</p>
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