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I have tried using llvm-ar/nm/ranlib instead of the ones provided by
binutils, but I'm still getting the same errors.<br>
<br>
Thank you for clarifying about the linked bug!<br>
<br>
<div class="moz-cite-prefix">Am 05.04.2016 um 17:21 schrieb Matt
Godbolt:<br>
</div>
<blockquote
cite="mid:CAFWXXN1WAkvRJyi-r7+h1trXtyd5jC7gHpAozCW4700nvGS_bg@mail.gmail.com"
type="cite">
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<div dir="ltr">In the linked bug, the issue is that symbols
defined in multiple places (LTO and non-LTO) are provided by the
linker plugin (which in GCC's case marks the symbols as
private). The error appears to be a difference in which symbol
gold or ld picks as canonical. I don't think it's the same as
the issue you're seeing (unless you're mixing LTO and non-LTO
files).
<div><br>
</div>
<div>I'd guess likely the 'ar' et al needs to be the llvm-ar. I
have no experience with LTO in llvm, but with GCC unless one
uses the "right" ar, then often LTO information is lost in the
archive.</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Tue, Apr 5, 2016 at 8:43 AM Daniil Troshkov
via llvm-dev <<a moz-do-not-send="true"
href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">you can also try to find exactly revision
number (using binary search through revisions and using
comments in suspicious commits) and try to ask author
directly... at least it will be additional info...</div>
<div dir="ltr">
<div class="gmail_extra"><br>
<div class="gmail_quote">On Tue, Apr 5, 2016 at 4:28 AM,
Below, Daniel via llvm-dev <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:llvm-dev@lists.llvm.org"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a></a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px
0px
0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
<div
style="color:rgb(0,0,0);font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;background-color:rgb(255,255,255)"
dir="ltr">
<p>Hi all,</p>
<p><br>
</p>
<p>I've been playing around with LLVM and LTO trying
to compile some open-source projects.</p>
<p><br>
</p>
<p>Prior to the 3.8 release I had been using r250630
(if I remember correctly) and I was able to
successfully build GamePlay (<a
moz-do-not-send="true"
href="https://github.com/gameplay3d/GamePlay"
target="_blank"><a class="moz-txt-link-freetext" href="https://github.com/gameplay3d/GamePlay">https://github.com/gameplay3d/GamePlay</a></a>).</p>
<p>Sadly, since upgrading to 3.8 I am getting weird
link-time-errors (error: undefined reference to
'XYZ::~XYZ').</p>
<p><br>
</p>
<p>It appears that these destructors are all virtual
(although I cannot guarantee this does not break
for non-virtual destructors too). The project
generates an archive file which is then linked
against to generate a few sample applications.
During this linking phase, the above error
(undefined reference to 'XYZ::~XYZ') appears.</p>
<p><br>
</p>
<p><br>
</p>
<p>I have upgraded the gold-linker, and I have tried
using the current trunk of LLVM - both did not
help. After three days of trying to debug this, I
have run out of ideas.</p>
<p><br>
</p>
<p>Is this a known bug? I have found an issue on the
gnu/binutils bugtracker that sounds similar (<a
moz-do-not-send="true"
href="https://lists.gnu.org/archive/html/bug-binutils/2016-03/msg00235.html"
target="_blank"><a class="moz-txt-link-freetext" href="https://lists.gnu.org/archive/html/bug-binutils/2016-03/msg00235.html">https://lists.gnu.org/archive/html/bug-binutils/2016-03/msg00235.html</a></a>
- bugged symbol resolution of weak symbols),
although in my case compilation is aborted because
of said errors.</p>
<p><br>
</p>
<p>Have there been any undocumented changes to LTO
in 3.8 I should be aware of? Is there maybe a
specific gold-linker version I have to use or
should I use llvm-ar/nm now, instead of the ar/nm
provided by binutils (which have worked for me
before 3.8)?</p>
<p><br>
</p>
<p>Any help is greatly appreciated,</p>
<p><br>
</p>
<p>Daniel<br>
</p>
</div>
<br>
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