llvm dev - Apr 2007 - [LLVMdev] Using LLVM as a crosscompiler

Hello, Koen.
> So my question is: How should I build llvm and llvm-gcc4 to have it
cross-compile from x86
> to ARM/EABI?
Well, just supply appropriate --host/--target options to configure. 
I haven't tried ARM, but this definitely works for crosscompiling from
linux to mingw32. Please also note, that you'll need native (=arm) tools
(binutils, libcheaders, etc) during gcc build process.
-- 
With best regards, Anton Korobeynikov.

Faculty of Mathematics & Mechanics, Saint Petersburg State University.

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Anton Korobeynikov schreef:
> Hello, Koen.
> 
>> So my question is: How should I build llvm and llvm-gcc4 to have it
cross-compile from x86
>> to ARM/EABI?
> Well, just supply appropriate --host/--target options to configure. 
To llvm or llvm-gcc4?
> I haven't tried ARM, but this definitely works for crosscompiling from
> linux to mingw32. Please also note, that you'll need native (=arm)
tools
> (binutils, libcheaders, etc)
You mean binutils-cross, right?
> during gcc build process.
Building gcc as a crosscompiler is fully automized in OpenEmbedded, I'm
trying to add
llvm-gcc4 into that framework.

regards,

Koen

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (Darwin)

iD8DBQFGEBMwMkyGM64RGpERAnL+AKC4gtxNAPJetf0kOPJC2NAqF31tDwCfWmAu
WiNlCu36rf5JQ+AwGs7VSMs=LLY2
-----END PGP SIGNATURE-----

Hi Koen,

The process to build llvm-gcc as a crosscompiler is basically the same
as build a normal gcc as crosscompiler. The differences: you need a
LLVM installed (compiled for the host). You must configure llvm-gcc
with --enable-llvm.

Problems:
- Today LLVM supports ARM/EABI, but llvm-gcc don't. You must apply the
patch:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070319/046070.html
(Please someone commit this patch!)
- If your host system libraries are newer then gcc 4.0, you must
configure llvm-gcc with "--disable-shared" (this is a workaround for a
bug)


It would be great to have llvm-gcc inside OpenEmbedded. The Mamona
project could be the first Linux distribution totally compiled by
llvm-gcc!

Lauro

2007/4/1, Koen Kooi <koen at
dominion.kabel.utwente.nl>:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Anton Korobeynikov schreef:
> > Hello, Koen.
> >
> >> So my question is: How should I build llvm and llvm-gcc4 to have
it cross-compile from x86
> >> to ARM/EABI?
> > Well, just supply appropriate --host/--target options to configure.
>
> To llvm or llvm-gcc4?
>
> > I haven't tried ARM, but this definitely works for crosscompiling
from
> > linux to mingw32. Please also note, that you'll need native (=arm)
tools
> > (binutils, libcheaders, etc)
>
> You mean binutils-cross, right?
>
> > during gcc build process.
>
> Building gcc as a crosscompiler is fully automized in OpenEmbedded, I'm
trying to add
> llvm-gcc4 into that framework.
>
> regards,
>
> Koen
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.5 (Darwin)
>
> iD8DBQFGEBMwMkyGM64RGpERAnL+AKC4gtxNAPJetf0kOPJC2NAqF31tDwCfWmAu
> WiNlCu36rf5JQ+AwGs7VSMs> =LLY2
> -----END PGP SIGNATURE-----
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>

Hello
> grep llvm configure* doesn't return anything in trunk/, did I
> checkout[1] the wrong svn?
No. It's ok :) It's just complicated nature of gcc's build system.
In
fact, try "grep llvm gcc/configure" :)

-- 
With best regards, Anton Korobeynikov.

Faculty of Mathematics & Mechanics, Saint Petersburg State University.