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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - "Function is marked as dllimport, but not external" error after clang tries to drop dllimport attribute"
href="http://llvm.org/bugs/show_bug.cgi?id=20792">20792</a>
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<th>Summary</th>
<td>"Function is marked as dllimport, but not external" error after clang tries to drop dllimport attribute
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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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>-New Bugs
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
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<th>Reporter</th>
<td>hans@chromium.org
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The following code:
__declspec(dllimport) int f(int x);
int user(int x) {
return f(x);
}
int f(int x) { return 1; }
Compiled with:
clang -cc1 -triple -i686-pc-win32 -emit-obj a.cc
Results in this output:
a.cc:5:5: warning: 'f' redeclared without 'dllimport' attribute: previous
'dllimport' ignored
int f(int x) { return 1; }
^
a.cc:1:27: note: previous declaration is here
__declspec(dllimport) int f(int x);
^
a.cc:1:12: note: previous attribute is here
__declspec(dllimport) int f(int x);
^
Function is marked as dllimport, but not external.
i32 (i32)* @"\01?f@@YAHH@Z"
fatal error: error in backend: Broken function found, compilation aborted!
I think the llvm::Function object has already been created with the dllimport
attribute, before clang sees the definition of f() and drops it from the AST.</pre>
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</p>
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