[LLVMdev] Compile code for arm

[Amir Yazdanbakhsh]

OK. Thanks for your help.
My problem is I am playing with the size of registerfile in ARM. I thought
I can do it with only modifying the Target in the LLVM directory. But if it
is going to use gcc-toolchain, then I need to modify them as well which is
a huge work!

Best Regards,
A. Yazdanbakhsh

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

PhD. Student
School of Electrical and Computer Engineering
University of Wisconsin-Madison
E-mail:     yazdanbakhsh at wisc.edu


<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<



On Sat, Dec 8, 2012 at 2:05 PM, Renato Golin <rengolin at systemcall.org>wrote:

> Ok, These are the three options you should be playing with:
>
> -ccc-host-triple $(CCC_HOST_TRIPLE_ARM) \
> --sysroot=$(SYSROOT_ARM) \
> -gcc-toolchain $(GCC_TOOLCHAIN)
>
> Where the (sic) host triple defines the "target" triple too.
>
> Sysroot and gcc-toolchain is where you'll find the libraries and
> binutils for the ARM targets (you'll need them, since LLVM still can't
> cross-compile on its own).
>
> Another alternative is to compile to assembly and assembly/link with
> ARM gnu binutils, which is essentially the same thing, for now.
>
> Feel free to search for those three options on the list and you'll
> find a plethora or examples and discussions that will guide you
> through the process.
>
> cheers,
> --renato
>
>
> On 8 December 2012 19:52, Amir Yazdanbakhsh <amir.yazdanbakhsh at gmail.com>
> wrote:
> > Thanks for your help. But I got this warning which it seems it doesn't
> use
> > -triple
> >
> > "clang: warning: argument unused during compilation: '-triple
> arm-none-eabi'
> > "
> >
> > Best Regards,
> > A. Yazdanbakhsh
> >
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> >
> > PhD. Student
> > School of Electrical and Computer Engineering
> > University of Wisconsin-Madison
> > E-mail:     yazdanbakhsh at wisc.edu
> >
> >
> > <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
> >
> >
> >
> > On Sat, Dec 8, 2012 at 1:43 PM, Renato Golin <rengolin at systemcall.org>
> > wrote:
> >>
> >> On 8 December 2012 19:10, Amir Yazdanbakhsh <
> amir.yazdanbakhsh at gmail.com>
> >> wrote:
> >> > Hi,
> >> >
> >> > I've installed clang version 3.3 on ubuntu.
> >> > I want to cross-compile a C code into ARM (preferably) ARMv7. I want
> to
> >> > get
> >> > both assembly code and binary. Can anyone help me what are the steps
> >> > which
> >> > should I take?
> >>
> >> clang -triple arm-none-eabi (or many other variations including
> >> 'armv5', 'armv7a', 'linux', 'gnueabi', etc).
> >>
> >> There are other options, like -mcpu, -mfpu, -march, -mthumb that you
> >> can also tune. I'm not sure there is a list of all available options,
> >> but since you have the source, you can look into ToolChain.cpp or
> >> Tools.cpp in Clang/lib/Driver and see for yourself all the available
> >> options.
> >>
> >>
> >> > Second question, Is there anyway to tell compiler not to use any
> >> > Thumb/NEON/VFP instructions?
> >>
> >> Using the same flags, you can tune at your leisure. The combination of
> >> compiler flags might not be the most straightforward, as this is
> >> somewhat a messy region. I advise you to search the list and try a bit
> >> for yourself, always checking on clang's source what's available.
> >>
> >> cheers,
> >> --renato
> >
> >
>
>
>
> --
> cheers,
> --renato
>
> http://systemcall.org/
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20121208/1098ed07/attachment.html>