<div dir="ltr"><br><br><div class="gmail_quote"><div dir="ltr">On Sun, Jul 24, 2016 at 8:59 AM Sedat Dilek via llvm-dev <<a 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">Hi,<br>
<br>
I am still struggling with my optimized/speedup build of llvm-toolchain v3.8.1.<br>
Here: Enable LTO, PGO, optimized-TableGen, split-DWARF and build with<br>
GNU/gold and LLVMgold-plugin.<br>
<br>
The objcopy (binutils v2.22) here on Ubuntu/precise AMD64 does not<br>
support '--extract-dwo'.<br>
<br>
My build fails with... /usr/bin/objcopy: unrecognized option '--extract-dwo'.<br>
<br>
Now, I did a full build of binutils v2.26.1 and using its binaries.<br>
<br>
Is it possible to embed a test if objcopy is able to perform '--extract-dwo'?<br>
( I cannot say which of the speedup options require this option. )<br></blockquote><div><br></div><div>split-DWARF requires objcopy's --extract-dwo. If your tools don't support it, turn off split DWARF & you should be fine.<br><br>- Dave</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
Thanks.<br>
<br>
Regards,<br>
- Sedat -<br>
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