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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 --- - pragma weak doesn't work if has more than 1 alias"
href="https://llvm.org/bugs/show_bug.cgi?id=28611">28611</a>
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<tr>
<th>Summary</th>
<td>pragma weak doesn't work if has more than 1 alias
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>3.9
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Frontend
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>qshanz@cn.ibm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre><span class="quote">> cat a.c</span >
#pragma weak a = bad
#pragma weak b = bad
#pragma weak c = bad
void bad(int *info ) { *info = 0 ; }
<span class="quote">> clang a.c -c
> readelf -sW a.o</span >
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000000000 0 FILE LOCAL DEFAULT ABS a.c
2: 0000000000000000 32 FUNC WEAK DEFAULT 2 a
3: 0000000000000000 32 FUNC GLOBAL DEFAULT 2 bad
Note that, the symbol b and c are missing.
This is gcc behavior:
8: 0000000000000000 52 FUNC GLOBAL DEFAULT 1 bad
9: 0000000000000000 52 FUNC WEAK DEFAULT 1 a
10: 0000000000000000 52 FUNC WEAK DEFAULT 1 b
11: 0000000000000000 52 FUNC WEAK DEFAULT 1 c
<span class="quote">> clang -v</span >
clang version 3.9.0 (trunk 264998) (llvm/trunk 264997)
Target: powerpc64le-unknown-linux-gnu
Thread model: posix</pre>
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