llvm dev - Oct 2011 - [LLVMdev] Problems with llvm-gcc and gold plugin

Hi everyone,

I'm new to LLVM and I'm still trying to learn how to get everything up  
and running. I'm trying to use llvm-gcc with the gold plugin and it  
complains that it can't find LLVMgold.so. As a simple test case I  
wrote a very basic C file:
--- main.c ---
int main () {
         return 0;
}
------
and compiled it with:
$ llvm-gcc -use-gold-plugin main.c
llvm-gcc: -use-gold-plugin, but LLVMgold.so not found.

The file in question, LLVMgold.so, was successfully compiled into  
llvm/Release+Asserts/lib/LLVMgold.so and I copied it into  
llvm-gcc/libexec/gcc/x86_64-unknown-linux-gnu/4.2.1/LLVMgold.so. It is  
my understanding that the file is looked for in the same directory  
that has cc1 and I have a  
llvm-gcc/libexec/gcc/x86_64-unknown-linux-gnu/4.2.1/cc1.

Does anyone know what I am missing?

Thanks.

-- Luis D. Pedrosa

On 10/22/2011 01:12 AM, Luis D. Pedrosa wrote:
> Hi everyone,
>
> I'm new to LLVM and I'm still trying to learn how to get everything
up
> and running. I'm trying to use llvm-gcc with the gold plugin and it
> complains that it can't find LLVMgold.so. As a simple test case I
> wrote a very basic C file:
> --- main.c ---
> int main () {
>           return 0;
> }
> ------
> and compiled it with:
> $ llvm-gcc -use-gold-plugin main.c
> llvm-gcc: -use-gold-plugin, but LLVMgold.so not found.
>
> The file in question, LLVMgold.so, was successfully compiled into
> llvm/Release+Asserts/lib/LLVMgold.so and I copied it into
> llvm-gcc/libexec/gcc/x86_64-unknown-linux-gnu/4.2.1/LLVMgold.so. It is
> my understanding that the file is looked for in the same directory
> that has cc1 and I have a
> llvm-gcc/libexec/gcc/x86_64-unknown-linux-gnu/4.2.1/cc1.
>
> Does anyone know what I am missing?
I think you also need to copy libLTO.so, but I would recommend trying 
clang instead of llvm-gcc.
> Thanks.
>
> -- Luis D. Pedrosa
>
>
Cheers,
Rafael

On Tuesday, October 25, 2011 10:48:35 AM Rafael Ávila de Espíndola
wrote:
> On 10/22/2011 01:12 AM, Luis D. Pedrosa wrote:
> > Hi everyone,
> > 
> > I'm new to LLVM and I'm still trying to learn how to get
everything up
> > and running. I'm trying to use llvm-gcc with the gold plugin and
it
> > complains that it can't find LLVMgold.so. As a simple test case I
> > wrote a very basic C file:
> > --- main.c ---
> > int main () {
> > 
> >           return 0;
> > 
> > }
> > ------
> > and compiled it with:
> > $ llvm-gcc -use-gold-plugin main.c
> > llvm-gcc: -use-gold-plugin, but LLVMgold.so not found.
> > 
> > The file in question, LLVMgold.so, was successfully compiled into
> > llvm/Release+Asserts/lib/LLVMgold.so and I copied it into
> > llvm-gcc/libexec/gcc/x86_64-unknown-linux-gnu/4.2.1/LLVMgold.so. It is
> > my understanding that the file is looked for in the same directory
> > that has cc1 and I have a
> > llvm-gcc/libexec/gcc/x86_64-unknown-linux-gnu/4.2.1/cc1.
> > 
> > Does anyone know what I am missing?
> 
> I think you also need to copy libLTO.so, but I would recommend trying
> clang instead of llvm-gcc.
> 
> > Thanks.
> > 
> > -- Luis D. Pedrosa
> 
> Cheers,
> Rafael
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
Thanks for the help, Rafael.

I had already copied that file as well, so that is not the issue. Any other 
ideas?

As for using clang instead, I am actually going to be using klee and similar 
analysis tools (cloud9). Their documentation is based on llvm-gcc, which is 
why I took that route. I was trying to deviate from the their vanilla 
installation as little possible, but if all else fails I can try clang and see 
if it works.

Thanks.

-- Luis D. Pedrosa