llvm dev - Jul 2012 - [LLVMdev] llvm/dragonegg as drop-in replacement to gcc

Hello,

Does anyone know of any effort to create a drop-in replacement to gcc, g++
and gfortran using llvm/dragonegg? From what I understand, the link step is
complicated because one needs to use llvm-ld to convert the bitcode to a
native binary and not all options to gcc/g++/gfortran can be passed to
llvm-ld. I believe I could use llvm-as to compile bitcode to x86 assembly
and then link everything together using gcc/g++/gfortran but this approach
poses problems when building / using libraries (`.a' files). [
https://github.com/travitch/whole-program-llvm] seems to come close but it
works only for gcc and g++ (not gfortran). Clang doesn't support OpenMP and
hence doesn't look like a viable option at this time. Any other ways of
using dragonegg in a transparent way?

Thanks much!
Ashay
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Hi Ashay,
> Does anyone know of any effort to create a drop-in replacement to gcc, g++
and
> gfortran using llvm/dragonegg? From what I understand, the link step is
> complicated because one needs to use llvm-ld to convert the bitcode to a
native
> binary
this is only the case if you use the -flto flag, otherwise native assembler is
produced just like gcc.  Is it link-time optimization that you are trying to do
transparently?

Ciao, Duncan.

  and not all options to gcc/g++/gfortran can be passed to llvm-ld.
I
> believe I could use llvm-as to compile bitcode to x86 assembly and then
link
> everything together using gcc/g++/gfortran but this approach poses problems
when
> building / using libraries (`.a' files).
> [https://github.com/travitch/whole-program-llvm] seems to come close but it
> works only for gcc and g++ (not gfortran). Clang doesn't support OpenMP
and
> hence doesn't look like a viable option at this time. Any other ways of
using
> dragonegg in a transparent way?
>
> Thanks much!
> Ashay
>
>
>
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