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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Provide a way to compile legacy code that uses argument-less return in non-void functions"
href="http://llvm.org/bugs/show_bug.cgi?id=20532">20532</a>
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<th>Summary</th>
<td>Provide a way to compile legacy code that uses argument-less return in non-void functions
</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>All
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
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<th>Reporter</th>
<td>fuzxxl@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Legacy code I try to compile (e.g. the Mosaic source code) contains code like
this:
foo() {
/* ... */
return;
/* ... */
}
Which is, a return statement without an argument in a function of non-void
type. While gcc accepts such constructs, clang doesn't like them and promptly
refuses compilation:
q.c:2:2: error: non-void function 'foo' should return a value
[-Wreturn-type]
return;
^
Manually patching all places where such constructs appear is cumbersome. clang
should either provide a compiler flag that turns this kind of return-mismatch
into a warning, treating the returned value as undefined, and optionally accept
this kind of code by default if -std=gnu89 or -std=gnu99 is provided.</pre>
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</p>
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