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Do I have to add new parameters to the build system with the new
release? <br>
<br>
It has been working before 3.8 and I have not changed any other
settings.<br>
<br>
<div class="moz-cite-prefix">Am 05.04.2016 um 19:49 schrieb Rafael
Espíndola:<br>
</div>
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cite="mid:CAG3jReKbEvdHSMatOd-Fr=ekRk6LB2ATRc08poNvfFGoVn=1BQ@mail.gmail.com"
type="cite">
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<p dir="ltr">You can use gnu ar, but you have to make sure it is
also using the plugin.</p>
<div class="gmail_quot<blockquote class=" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<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" target="_blank">llvm-dev@lists.llvm.org</a>>
wrote:<br>
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<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">https://lists.gnu.org/archive/html/bug-binutils/2016-03/msg00235.html</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>
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