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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - scan-build is not allowing cross compile"
href="http://llvm.org/bugs/show_bug.cgi?id=19583">19583</a>
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<th>Summary</th>
<td>scan-build is not allowing cross compile
</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>
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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>Static Analyzer
</td>
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<th>Assignee</th>
<td>kremenek@apple.com
</td>
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<th>Reporter</th>
<td>npl@chello.at
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>I am trying to run scan-build on a project for arm-none-eabi. I have not been
able to configure the script to pick up the right settings.
The filesystem layout is the following:
/usr/bin/clang[++]
/usr/bin/scan-build
/opt/mytoolchain/bin/arm-none-eabi-clang[++] -> /usr/bin/clang[++] (symlink)
/opt/mytoolchain/bin/arm-none-eabi-scan-build -> /usr/bin/scan-build (symlink)
The invocation is:
/opt/mytoolchain/bin/arm-none-eabi-scan-build
--use-cc=/opt/mytoolchain/bin/arm-none-eabi-clang
--use-c++=/opt/mytoolchain/bin/arm-none-eabi-clang++
--use-analyzer=/opt/mytoolchain/bin/arm-none-eabi-clang++ make ...
which should mean that /opt/mytoolchain/bin/arm-none-eabi-clang++ is used as
analyzer and pick up the correct settings. The scan-build script however runs a
"realpath" on the path and thus uses /usr/bin/clang++ directly...
I fixed this by modifying the scan-build script:
change
$Clang = Cwd::realpath($AnalyzerDiscoveryMethod);
to
$Clang = $AnalyzerDiscoveryMethod;
I would like this change to be applied in trunk. I think it can be required
that the user has to supply an absolute path for this parameter. Otherwise its
pretty hard to use this script in a cross-compile environment (hardlink would
be an option, but I would prefer something that can easily deployed with a
simple tar archive...)
Further, maybe the scan-build script could try to locate the correct clang
automatically from the invocation. ie. make a symlink
"arm-none-eabi-scan-build" and upon invocation it should deduce the default
cross compiler arm-none-eabi-gcc/g++ and analyzer arm-none-eabi-clang++
(just replace -scan-build with -clang from the commandline)?</pre>
</div>
</p>
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