[LLVMdev] Linking LLVM code with LLVM

[Marc Ordinas i Llopis]

Excuse the long post,

Chris Lattner wrote:

> On Fri, 11 Mar 2005, Marc Ordinas i Llopis wrote:
>
>> Sorry if this is obvious.
>> I'm trying to link LLVM-generated code with LLVM itself, and don't 
>> know how to do it. Just as a little test, I've tried compiling the 
>> example HowToUseJIT.cpp using llvm-g++, but I get tons of errors.
>>
>> Is there an easy way of doing this? Has anyone tried it before?
>
>
> What sort of errors do you get?  Are you passing the right -I options?
>
Sorry, I didn't mean I had problems compiling HowToUseJIT.cpp with 
llvm-g++. Using the right -I options, I get a correct HowToUseJIT.o 
bytecode file. The problem is when I try to link it to LLVM to produce a 
executable.

To try things out, I created a project based on the sample and included 
the HowToUseJIT code. This compiles perfectly. Next I tried changing the 
CXX and CC variables in the makefile to use llvm-g++. This got me

gccld: Unknown command line argument '--rpath'.  Try: 'gccld --help'

Then I tried the last command produced by the makefile without the 
--rpath option, but the makefile always removes the produced .o in 
.libs, even when RM is set to 'touch'. I haven't found any way to keep 
the intermediate files, by the way.

Next thing, doing it all by hand, using the same command line as 
produced by the makefile but removing --rpath and using HowToUseJIT.cpp 
as input instead of the .o file, gets me

gccld: warning: File of unknown type 
'/home/marc/code/llvm/build/Debug/lib/LLVMInterpreter.o' ignored.
gccld: warning: File of unknown type 
'/home/marc/code/llvm/build/Debug/lib/LLVMJIT.o' ignored.
gccld: warning: File of unknown type 
'/home/marc/code/llvm/build/Debug/lib/LLVMCodeGen.o' ignored.
gccld: warning: File of unknown type 
'/home/marc/code/llvm/build/Debug/lib/LLVMExecutionEngine.o' ignored.
gccld: warning: File of unknown type 
'/home/marc/code/llvm/build/Debug/lib/LLVMX86.o' ignored.
gccld: warning: File of unknown type 
'/home/marc/code/llvm/build/Debug/lib/LLVMSelectionDAG.o' ignored.
gccld: warning: File of unknown type 
'/home/marc/code/llvm/build/Debug/lib/LLVMScalarOpts.o' ignored.
gccld: warning: File of unknown type 
'/home/marc/code/llvm/build/Debug/lib/LLVMBCReader.o' ignored.
gccld: warning: File of unknown type 
'/home/marc/code/llvm/build/Debug/lib/LLVMCore.o' ignored.
gccld: warning: File of unknown type 
'/home/marc/code/llvm/build/Debug/lib/LLVMbzip2.o' ignored.
gccld: warning: File of unknown type 
'/home/marc/code/llvm/tests/sample/Debug/bin' ignored.

and the linker goes into an infinite loop, never returning to the 
command line.

Finally, I tried first generating the .o (bytecode) file, and then 
linking got me the same result.

So, I'm really stuck here. Is there a way of linking LLVM-produced code 
with LLVM? Has anyone tried it before?

Thanks,

Marc Ordinas i Llopis | Tragnarion Studios