llvm dev - Nov 2012 - [LLVMdev] Question about compiling LLVM through cross-compiler for ARM

Hi All,

I'm trying to compile clang+llvm on my desktop with cross-compiler to be
able to work with llvm commands in ubuntu-arm image whithin gem5.
If anybody has done this before I'd be so thankful to know the exact
process and commands. I tried to configure llvm as follows but I couldn't
get the arm-arm version correctly. To sum up, I need to cross-compile llvm
for ARM to work in gem5 through the ubuntu image for ARM systems.

../llvm/configure --host=arm-none-linux-gnueabi
--target=arm-none-linux-gnueabi --prefix=/path/to/install
--with-sysroot=/usr/arm-linux-gnueabi

Best regards
Negar
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Hello

It will be really great if you'd provide which problems you had. Just
"couldn't get" is definitely not enough for any suggestion.
Unfortunately, telepathy modules are not mainstream yet ;)

On Tue, Nov 20, 2012 at 7:56 PM, Negar Mir <nmiralaei at gmail.com>
wrote:
> Hi All,
>
> I'm trying to compile clang+llvm on my desktop with cross-compiler to
be
> able to work with llvm commands in ubuntu-arm image whithin gem5.
> If anybody has done this before I'd be so thankful to know the exact
process
> and commands. I tried to configure llvm as follows but I couldn't get
the
> arm-arm version correctly. To sum up, I need to cross-compile llvm for ARM
> to work in gem5 through the ubuntu image for ARM systems.
>
> ../llvm/configure --host=arm-none-linux-gnueabi
> --target=arm-none-linux-gnueabi --prefix=/path/to/install
> --with-sysroot=/usr/arm-linux-gnueabi
>
> Best regards
> Negar
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>


-- 
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University

> It is done. Then, I should copy this version on my image and then boot the
image with gem5. The
> problem is when I try to run llvm-commands in gem5, they don't work and
said : "cannot execute binary file".
What does "file" says on the binary?
> This means that I couldn't cross-compile the llvm for ARM to work on
ARM!
Something is broken on your side. I can definitely cross-compile LLVM to mingw32

On Wed, Nov 21, 2012 at 4:12 PM, Negar Mir <nmiralaei at gmail.com>
wrote:
> Hi Anton,
>
> Sorry for the brief description. The problem is:
>
> I am trying to make llvm commands working in my Ubuntu-ARM image within
> gem5.
> After downloading clang+llvm, I tried to build and configure llvm by using
> cross-compiler with the following commands.
>
> ../llvm/configure --host=arm-none-linux-gnueabi --target=arm-none-linux-
> gnueabi --prefix=/path/to/install --with-sysroot=/usr/arm-linux-gnueabi
>
>
> It is done. Then, I should copy this version on my image and then boot the
> image with gem5. The problem is when I try to run llvm-commands in gem5,
> they don't work and said : "cannot execute binary file". This
means that I
> couldn't cross-compile the llvm for ARM to work on ARM! I need some
guidance
> about how to cross-compile llvm which can be run on the ARM machine. I
think
> the version I am making now is host in X86 but generate ARM version. I need
> the host be ARM and the generated code be ARM as well. I hope I could
> describe the problem clearly! Thanks in advance for your help.
>
> Cheers
> Negar
>
>
> On Tue, Nov 20, 2012 at 7:46 PM, Anton Korobeynikov
> <anton at korobeynikov.info> wrote:
>>
>> Hello
>>
>> It will be really great if you'd provide which problems you had.
Just
>> "couldn't get" is definitely not enough for any
suggestion.
>> Unfortunately, telepathy modules are not mainstream yet ;)
>>
>> On Tue, Nov 20, 2012 at 7:56 PM, Negar Mir <nmiralaei at
gmail.com> wrote:
>> > Hi All,
>> >
>> > I'm trying to compile clang+llvm on my desktop with
cross-compiler to be
>> > able to work with llvm commands in ubuntu-arm image whithin gem5.
>> > If anybody has done this before I'd be so thankful to know the
exact
>> > process
>> > and commands. I tried to configure llvm as follows but I
couldn't get
>> > the
>> > arm-arm version correctly. To sum up, I need to cross-compile llvm
for
>> > ARM
>> > to work in gem5 through the ubuntu image for ARM systems.
>> >
>> > ../llvm/configure --host=arm-none-linux-gnueabi
>> > --target=arm-none-linux-gnueabi --prefix=/path/to/install
>> > --with-sysroot=/usr/arm-linux-gnueabi
>> >
>> > Best regards
>> > Negar
>> >
>> > _______________________________________________
>> > LLVM Developers mailing list
>> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>> >
>>
>>
>>
>> --
>> With best regards, Anton Korobeynikov
>> Faculty of Mathematics and Mechanics, Saint Petersburg State University
>
>


-- 
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University

>> > It is done. Then, I should copy this version on my image and then
boot
>> > the image with gem5. The
>> > problem is when I try to run llvm-commands in gem5, they don't
work and
>> > said : "cannot execute binary file".
>> What does "file" says on the binary?
> when I use commands like : "#arm-linux-gnueabi-clang test.c -o
test" or any
> other commands like lli, clang++, ... the error occurs.
Sorry,  I won't be able to help you if you won't show the output as I
requested.
> Could you tell me how did you cross-compiled LLVM to mingw32? I mean the
> command which you used for. So, I can compare it with mine and maybe find
> something useful!
Just straight --host / --target configure

PS: There is "Reply All" button, please reply to the list as well

--
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University

On Wed, Nov 21, 2012 at 8:02 PM, Anton Korobeynikov <anton at
korobeynikov.info
> wrote:
> >> > It is done. Then, I should copy this version on my image and
then boot
> >> > the image with gem5. The
> >> > problem is when I try to run llvm-commands in gem5, they
don't work
> and
> >> > said : "cannot execute binary file".
> >> What does "file" says on the binary?
> > when I use commands like : "#arm-linux-gnueabi-clang test.c -o
test" or
> any
> > other commands like lli, clang++, ... the error occurs.
> Sorry,  I won't be able to help you if you won't show the output as
I
> requested.
>
Alright, the attached file is a photo of two terminals. the left hand side
is the error after I tried to cross-compile llvm with the mentioned
command. And, the right one is the error when I just used --host and
--target without considering the sys-root:
../llvm/configure --host=arm-none-linux-gnueabi --target=arm-none-linux-
gnueabi --prefix=/path/to/install

 I hope it will help.

> > Could you tell me how did you cross-compiled LLVM to mingw32? I mean
the
> > command which you used for. So, I can compare it with mine and maybe
find
> > something useful!
> Just straight --host / --target configure
> PS: There is "Reply All" button, please reply to the list as well
>
You're right, thank you.
>
> --
> With best regards, Anton Korobeynikov
> Faculty of Mathematics and Mechanics, Saint Petersburg State University
>
Cheers
Negar
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