llvm dev - Mar 2009 - [LLVMdev] How to use the JIT with llvm-gfortran ?

Hi all,

I am having a look at llvm-gfortran; it compiles OK, but I do not know how to
using the JIT as described in http://llvm.org/docs/GettingStarted.html#tutorial.
With llvm-gcc I managed to invoke the lli properly, but with llvm-gfortran
compiled programs, it fails with the following message:

philou at tleilax:~/gcc/llvm/install/bin$ lli ./main.bc 
'main' function not found in module.

I understand it does not find the entry point of the program ( gfortran  creates
a MAIN__ function  to be linked with some other code ).

What should I so to have the lli running fortran code ?

Regards,

Philippe


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Hi,

Have you try the "-entry-function=" parameter of lli ?

Olivier.

2009/3/31 philippe marguinaud <pmarguinaud at
hotmail.com>:
> Hi all,
>
> I am having a look at llvm-gfortran; it compiles OK, but I do not know how
> to using the JIT as described in
> http://llvm.org/docs/GettingStarted.html#tutorial. With llvm-gcc I managed
> to invoke the lli properly, but with llvm-gfortran compiled programs, it
> fails with the following message:
>
> philou at tleilax:~/gcc/llvm/install/bin$ lli ./main.bc
> 'main' function not found in module.
>
> I understand it does not find the entry point of the program ( gfortran
> creates a MAIN__ function  to be linked with some other code ).
>
> What should I so to have the lli running fortran code ?
>
> Regards,
>
> Philippe
>
>
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>

Hi
> I understand it does not find the entry point of the program
> ( gfortran  creates a MAIN__ function  to be linked with some other
> code ).
> What should I so to have the lli running fortran code ?
This can be tricky... I think you should compile libgfortran as .bc
library and link it in. main() is library function there :(

-- 
With best regards, Anton Korobeynikov.

Faculty of Mathematics & Mechanics, Saint Petersburg State University.