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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Third field of llvm.global_ctors not used on ELF"
href="http://llvm.org/bugs/show_bug.cgi?id=20793">20793</a>
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<th>Summary</th>
<td>Third field of llvm.global_ctors not used on ELF
</td>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</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>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Common Code Generator Code
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>rafael.espindola@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu, rnk@google.com
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>This is just a reminder of a missing feature.
Given
-----------------------------------
@v = weak_odr global i8 0
@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void
\
()*, i8* } { i32 65535, void ()* @f, i8* @v}]
define void @f() {
entry:
ret void
}
--------------------------------------------
With x86_64-pc-win32 we produce
-----------------------------------------------
.section .bss,"bw",discard,v
.globl v # @v
v:
.byte 0 # 0x0
.section .CRT$XCU,"rd",associative,v
.align 8
.quad f
------------------------------------------------
but with x86_64-pc-linux
we produce
-----------------------------------------------
.section .bss.v,"aGw",@nobits,v,comdat
.weak v
v:
.byte 0 # 0x0
.size v, 1
.section .ctors,"aw",@progbits
.align 8
.quad f
-----------------------------------------------
We could put this .ctors section in the v comdat.</pre>
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