[LLVMdev] compile linux kernel

[Ashish Bijlani]

does that mean .o generated with  gcc (.c -> .s and .s -> .o) will not
contain llvm ir?

i meant, final kernel bitcode ir arch independent and can be JIT with
any arch-specific backend. Is it not the case?

thanks,
ashish

On Sat, Sep 27, 2008 at 10:43 PM, Andrew Lenharth <andrewl at lenharth.org> wrote:
> On Sat, Sep 27, 2008 at 8:08 PM, Ashish Bijlani
> <ashish.bijlani at gmail.com> wrote:
>> If I use GCC to generate asm-offsets.s file, then the build system go
>> ahead but fails when it generates .so files as Andrew pointed out.
>
> You have to generate this with gcc.  .c -> .s and .s -> .o need gcc,
> .c -> .o can use llvm-gcc.  The combination has to be fixed up in
> final linking.
>
>> Now, If the build systems generates .so files, then it will be
>> difficult o actually generate fully arch-independent kernel code,
>> isn't it?
>
> A llvm compiled kernel is in no way arch-independent.  It is very very
> arch dependent.
>
> Andrew
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