[LLVMdev] LLVM Basic Program Compilation

[Prakash Premkumar]

Thanks a lot waxiadao . can you kindly tell me the exact commands that I
will have to use?
On 3 Aug 2014 15:49, "waxiadao at gmail.com" <waxiadao at gmail.com> wrote:

> For some reasons lli and other tools is not compiled with -fPIC
> -rdynamic flags,so you have to append -extra-object=/path/to/llvmlib
> to let lli resolve them.
>
> 2014-08-01 20:42 GMT+08:00 Prakash Premkumar <prakash.prax at gmail.com>:
> > I am just getting started with llvm.
> >
> > Here's code I am trying to compile:
> >
> > #include <stdio.h>
> > #include "llvm/IR/LLVMContext.h"
> > #include "llvm/IR/Module.h"
> > #include "llvm/IR/IRBuilder.h"
> >
> >
> > int main()
> > {
> >   llvm::LLVMContext& context = llvm::getGlobalContext();
> >   llvm::Module* module = new llvm::Module("top", context);
> >   llvm::IRBuilder<> builder(context);
> >
> >   module->dump( );
> > }
> >
> > when i compile with :
> >
> > llvm-g++ try.cpp  -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS
> > `llvm-config --cxxflags --ldflags --libs`
> >
> > I get the a.out file. No worries.
> >
> > But, I am interested in getting the LLVM IR file.So, I compiled with
> >
> > llvm-g++ try.cpp  -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -S
> > -emit-llvm
> > lli try.s
> >
> > I get an error saying
> >
> > LLVM ERROR: Program used external function '_ZN4llvm16getGlobalContextEv'
> > which could not be resolved!
> >
> > The command :
> >
> > llvm-g++ try.cpp  -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS
> > `llvm-config --cxxflags --ldflags --libs` -S -emit-llvm
> >
> > leaves me with several warnings and when i execute the resultant .s file
> > with lli , I get the same error as before.
> >
> > Thanks a lot for your help
> >
> >
> > Thank you,
> >
> > Prakash Premkumar
> >
> >
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> >
>
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