[LLVMdev] llvm-gfortran problems

[Ashay Rane]

Thats correct. But using llc becomes a problem when I have archives (.a
files). I could, in theory, extract its contents to a tempdir and then use
llc and link but just wondering if there is a more elegant solution.

Ashay


On Mon, Sep 12, 2011 at 3:00 PM, Dmitry N. Mikushin <maemarcus at gmail.com>wrote:

> Ashay,
>
> If I understand correctly, in hw.o you would have llvm bytecode, while
> linker expects regular object binary. Probably first you need to emit
> asm out of bytecode using llc?
>
> - D.
>
> 2011/9/12 Ashay Rane <ashay.rane at tacc.utexas.edu>:
> > Hello,
> > Sorry for the late reply. Using dragonegg worked well, thanks all!
> > Just as a note... I had to use llvm-ld during the link step because
> gfortran
> > could not link bitcode. Here's an example of the error shown when using
> > gfortran instead of llvm-ld:
> > $ ${GCC_4_5_0}/bin/gfortran hw.f -c
> > -fplugin=${DRAGONEGG_PLUGIN}/dragonegg.so -o hw.o -flto -emit-llvm -S
> > $ ${LLVM_2_9}/bin/opt -mem2reg hw.o -o hw.o
> > $ ${GCC_4_5_0}/bin/gfortran
> >
> -fplugin=${DRAGONEGG_PLUGIN}/dragonegg.so ${GCC_4_5_0}/lib64/libgfortran.a
> > hw.o -o hw
> > hw.o: file not recognized: File format not recognized
> > collect2: ld returned 1 exit status
> > $ file hw.o
> > hw.o: data
> > Instead, using llvm-ld:
> > $ ${LLVM_2_9}/bin/llvm-ld -native hw.o -o hw
> > ${GCC_4_5_0}/lib64/libgfortran.a -lm
> > llvm-gcc had the gold plugin. I wonder if there is any equivalent of that
> > for dragonegg to be able to compile bitcode and native object code in a
> > transparent manner.
> > Thanks again!
> > Ashay
> >
> > On Wed, Aug 31, 2011 at 4:29 PM, Anton Korobeynikov
> > <anton at korobeynikov.info> wrote:
> >>
> >> Hello
> >>
> >> > I am not very familiar with Fortran programs. I saw a few programs
> that
> >> > had
> >> > a "MAIN" subroutine defined, some others that did not. Am I missing
> >> > something while compiling the code? Is there a different way to
> compile
> >> > bitcode (from Fortran programs) to a native binary?
> >> For Fortran MAIN is indeed something similar to C main, but not
> >> exactly the same.
> >> You have to link the runtime library (libgfortran.a) in order to get
> >> "proper" main, mak sure all stuff is initialized properly, etc.
> >>
> >> --
> >> With best regards, Anton Korobeynikov
> >> Faculty of Mathematics and Mechanics, Saint Petersburg State University
> >
> >
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> >
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110912/dd52e2ba/attachment.html>