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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang/LLVM expose a weak symbol, preventing us linking."
href="https://bugs.llvm.org/show_bug.cgi?id=48563">48563</a>
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<th>Summary</th>
<td>Clang/LLVM expose a weak symbol, preventing us linking.
</td>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>10.0
</td>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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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>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>kalamatee@gmail.com
</td>
</tr>
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>We use an ASM macro to create an Alias extensively in our operating system,
however under LLVM/Clang it does not work, preventing us using the LLVM
toolchain from compiling the Operating System (www.aros.org).
#define __AROS_GM_STACKALIAS(fname, alias) \
void alias(void); \
asm(".weak " __GM_STRINGIZE(alias) "\n" \
"\t.set " __GM_STRINGIZE(alias) "," #fname \
);
The following is a simplified testcase showing the behaviour -:
extern void foo(void);
void bar(void);
asm(".weak foo\n"
"\t.set foo,bar");
void*functable[] =
{
&foo,
(void *)0
};
When this is compiled with GNU/GCC, we only have 2 symbols exposed - "bar", and
"functable", however with LLVM/Clang - there is also a weak reference for "foo"
exposed, which then is not resolved during linking.</pre>
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</p>
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