llvm dev - Jul 2010 - [LLVMdev] problem using LTO

Hello,

I down loaded "llvm-gcc4.2-2.7-x86_64-linux" and I built Spec2006 with
it.
It is great and except for one benchmark the rest work fine. I want to build
them with LTO now. I followed the directions in "
http://llvm.org/docs/GoldPlugin.html" and built ar, nm-new, and ld-new in
binutils. I also built libLLVMgold.so.
I get the following error:

llvm-gcc: -use-gold-plugin, but libLLVMgold.so not found.

The command I used with the example in
"http://llvm.org/docs/GoldPlugin.html"
is:

/home/reza/llvm-gcc4.2-2.7-x86_64-linux/bin/llvm-gcc -use-gold-plugin a.a
b.o -o main

I put libLLVMgold.so to /usr/lib/bfd-plugins and ar, nm-new and ld-new in
/usr/bin/ar and /usr/bin/nm and /usr/bin/ld respectively.

If I use the load by itself I get:

ld -plugin /usr/lib/bfd-plugins/libLLVMgold.so a.a b.o -o main

it loads but I get:

reza at reza-desktop:~/gcc/trunk/test/mytest$ ./main
Segmentation fault

Thanks,
Reza
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On 21 July 2010 22:14, Reza Yazdani <ry.yazdani at gmail.com>
wrote:
> Hello,
>
> I down loaded "llvm-gcc4.2-2.7-x86_64-linux" and I built Spec2006
with it.
> It is great and except for one benchmark the rest work fine. I want to
build
> them with LTO now. I followed the directions in
> "http://llvm.org/docs/GoldPlugin.html" and built ar, nm-new, and
ld-new in
> binutils. I also built libLLVMgold.so.
> I get the following error:
>
> llvm-gcc: -use-gold-plugin, but libLLVMgold.so not found.
>
> The command I used with the example in
> "http://llvm.org/docs/GoldPlugin.html" is:
>
> /home/reza/llvm-gcc4.2-2.7-x86_64-linux/bin/llvm-gcc -use-gold-plugin a.a
> b.o -o main
>
> I put libLLVMgold.so to /usr/lib/bfd-plugins and ar, nm-new and ld-new in
> /usr/bin/ar and /usr/bin/nm and /usr/bin/ld respectively.
You have to put a link to libLLVMgold.so in a place where llvm-gcc
will find it. An easy one is the directory with cc1 in it.
> If I use the load by itself I get:
>
> ld -plugin /usr/lib/bfd-plugins/libLLVMgold.so a.a b.o -o main
>
> it loads but I get:
>
> reza at reza-desktop:~/gcc/trunk/test/mytest$ ./main
> Segmentation fault

GCC adds other objects to the link that include startup code.
> Thanks,
> Reza

Cheers,
-- 
Rafael Ávila de Espíndola

Thanks: copying to where cc1 was made it to work.

Reza

On Thu, Jul 22, 2010 at 9:23 AM, Rafael Espindola <espindola at
google.com>wrote:
> On 21 July 2010 22:14, Reza Yazdani <ry.yazdani at gmail.com> wrote:
> > Hello,
> >
> > I down loaded "llvm-gcc4.2-2.7-x86_64-linux" and I built
Spec2006 with
> it.
> > It is great and except for one benchmark the rest work fine. I want to
> build
> > them with LTO now. I followed the directions in
> > "http://llvm.org/docs/GoldPlugin.html" and built ar, nm-new,
and ld-new
> in
> > binutils. I also built libLLVMgold.so.
> > I get the following error:
> >
> > llvm-gcc: -use-gold-plugin, but libLLVMgold.so not found.
> >
> > The command I used with the example in
> > "http://llvm.org/docs/GoldPlugin.html" is:
> >
> > /home/reza/llvm-gcc4.2-2.7-x86_64-linux/bin/llvm-gcc -use-gold-plugin
a.a
> > b.o -o main
> >
> > I put libLLVMgold.so to /usr/lib/bfd-plugins and ar, nm-new and ld-new
in
> > /usr/bin/ar and /usr/bin/nm and /usr/bin/ld respectively.
>
> You have to put a link to libLLVMgold.so in a place where llvm-gcc
> will find it. An easy one is the directory with cc1 in it.
>
> > If I use the load by itself I get:
> >
> > ld -plugin /usr/lib/bfd-plugins/libLLVMgold.so a.a b.o -o main
> >
> > it loads but I get:
> >
> > reza at reza-desktop:~/gcc/trunk/test/mytest$ ./main
> > Segmentation fault
>
>
> GCC adds other objects to the link that include startup code.
>
> > Thanks,
> > Reza
>
>
> Cheers,
> --
> Rafael Ávila de Espíndola
>
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