[LLVMdev] Compile C files to one .bc file

[Justin Holewinski]

On Wed, Mar 2, 2011 at 10:44 AM, Vincent De Bruyne <
vincent_de_bruyne at hotmail.com> wrote:

>  Hi
>
> I'm trying to compile the "bh" C program from the Olden benchmark to one bc
> file.
>
> # compile source files into an LLVM bitcode file
> llvm-gcc -emit-llvm -c args.c -o args.bc -w -DTORONTO
> llvm-gcc -emit-llvm -c newbh.c -o newbh.bc -w -DTORONTO
> llvm-gcc -emit-llvm -c util.c -o util.bc -w -DTORONTO
> llvm-gcc -emit-llvm -c walksub.c -o walksub.bc -w -DTORONTO
>
> # To link files together using llvm-ld
> llvm-ld -o bh.bc newbh.bc args.bc util.bc walksub.bc -lm
>

llvm-link would be better suited for this purpose.  It takes in several
byte-code files and combines them into a single byte-code file.  Also, you
do not need the -lm flag until you generate the final executable.


>
> But when I try to run my pass over bh.bc file or just compile it to native
> code
> llc bh.bc -o bh.s
>
> I get the following error.
> llc: bh.bc:1:1:* error: expected top-level entity*
>
> Do you need to do some special stuff when you want to compile a C program
> with different files to one bc file.
>
> Thx,
> Vincent
>
>
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>


-- 

Thanks,

Justin Holewinski
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