[LLVMdev] Getting LLVM bit-code for programs using a couple of libraries

[Sandeep K Chaudhary]

Can someone please help me with it?

Thanks and regards,
Sandeep.

On Mon, May 26, 2014 at 9:58 PM, Sandeep K Chaudhary
<babbusandy2006 at gmail.com> wrote:
> Hi guys,
>
> I am compiling some programs with clang which use a couple of
> libraries. When I compile with the command - "clang -O2 -I. -o hello
> -ldl -llttng-ust hello.c tp.c", it goes successful.
>
> My aim is to get the bitcode for these programs but if I try to
> generate the bitcode with -emit-llvm option, it produces linking
> issues as follows : (also at - http://pastebin.com/zkmL2SAH)
>
> sandeep at ubuntu:~/lttng-git/lttng-ust/tests/hello2$ clang -emit-llvm
> -O2 -I. -o hello -ldl -llttng-ust hello.c tp.c
> /usr/bin/ld: error: /tmp/hello-u3dmcq.o:1:3: invalid character
> /usr/bin/ld: error: /tmp/hello-u3dmcq.o:1:3: syntax error, unexpected $end
> /usr/bin/ld: error: /tmp/hello-u3dmcq.o: not an object or archive
> /usr/bin/ld: error: /tmp/tp-1CR8ta.o:1:3: invalid character
> /usr/bin/ld: error: /tmp/tp-1CR8ta.o:1:3: syntax error, unexpected $end
> /usr/bin/ld: error: /tmp/tp-1CR8ta.o: not an object or archive
> /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crt1.o(.text+0x20):
> error: undefined reference to 'main'
> clang: error: linker command failed with exit code 1 (use -v to see invocation)
>
> What is a way to go around these linking issues?
>
> Also, I can successfully generate bitcode for a simple hello-world
> program using the -emit-llvm program so I installation of clang/llvm
> on my system is good.
>
> PS: I hope that I am not mistaken in posting this query here. But if
> I'am, please excuse me.
>
> Thanks and regards,
> Sandeep.



-- 
Thanks and regards,
Sandeep K Chaudhary.