Re: [Jamvm-general] Cross-compiling fro ARM

[modsrm <mo...@gm...>]

Hi Rob,

thanks for the answer.

> If configure still refuses to enter cross-compilation try
> --disable-int-inlining.  It's the relocation checks for the
> code-copying JIT that are done differently if cross-compiling so
> disabling it will "fix" the problem.  However, performance will be
> affected (how much depends on the ARM architecture).  The code-copying
> JIT was enabled by default on ARM in JamVM 1.5.4.

I think i did get the flags right, and configure does enter cross
compilation mode.
Few subfolders are indeed cross compiled ( os/linux among others ).
Nonetheless compilation eventually fails with the error mentioned below

> arm-unknown-linux-gnueabi-gcc -g -O2
> -I/home/mods/development/embedded/tools/rootfs/include
> -L/home/mods/development/embedded/tools/rootfs/lib
> engine/compute_relocatability.c   -o engine/compute_relocatability
> engine/compute_relocatability.c:24:17: fatal error: jam.h: No such file or
> directory


My plan it to analyze GC performance, so building without the code copying
interpreter should not be a problem.
Ill give it a shot, ill let you know.

Thanks again.

R.



Robert Lougher wrote:
> 
> On 19 December 2012 12:55, Robert Lougher <rob...@gm...> wrote:
>> On 19 December 2012 09:44, modsrm <mo...@gm...> wrote:
>>>
>>> Hi there,
>>>
>>> ill bump this up cos im having the same problem while compiling JamVM
>>> for
>>> ARM.
>>>
>>> This is my configure command line:
>>>
>>> PATH=$PATH:/home/mods/development/embedded/tools/toolchain/arm-unknown-linux-gnueabi/bin/
>>> ./configure --host=arm-unknown-linux-gnueabi
>>> CPPFLAGS="-I/home/mods/development/embedded/tools/rootfs/include"
>>> LDFLAGS="-L/home/mods/development/embedded/tools/rootfs/lib"
>>>
>>> This is the failure of make:
>>>
>>> arm-unknown-linux-gnueabi-gcc -g -O2
>>> -I/home/mods/development/embedded/tools/rootfs/include
>>> -L/home/mods/development/embedded/tools/rootfs/lib
>>> engine/compute_relocatability.c   -o engine/compute_relocatability
>>> engine/compute_relocatability.c:24:17: fatal error: jam.h: No such file
>>> or
>>> directory
>>>
>>> I hope somebody can help!
>>>
>>
>> That file should not be built when cross-compiling.  This means that
>> configure has not entered cross-compilation mode.  This is probably
>> because you have only specified --host (the host is what you are
>> building on, not the target)  The autoconf recommended way to enable
>> cross-compilation is to specify both --build (the target) and --host
>> (the host machine).  If they are different, cross-compilation mode is
>> enabled, and no runtime checks are performed.
>>
> 
> I've got that the wrong way round, --build is the build machine type
> (I'm guessing x86[_64] linux) and --host is the ARM machine.
> 
> If configure still refuses to enter cross-compilation try
> --disable-int-inlining.  It's the relocation checks for the
> code-copying JIT that are done differently if cross-compiling so
> disabling it will "fix" the problem.  However, performance will be
> affected (how much depends on the ARM architecture).  The code-copying
> JIT was enabled by default on ARM in JamVM 1.5.4.
> 
> Rob.
> 
>>
>>> Thanks in advance,
>>>
>>> Roberto
>>>
>>>
>>>
>>> Jean-Marie Geffroy wrote:
>>>>
>>>> Hi,
>>>>
>>>> Thank you for this great JVM. I'm using it since 1 year embedded on
>>>> ARM systems for prototypes and consider using even more now. However,
>>>> I have a small problem when trying to cross-compile JamVM 1.5.4 for
>>>> ARM. I get the following error message:
>>>>
>>>> engine/compute_relocatability.c:24:17: jam.h: No such file or directory
>>>>
>>>> Any idea about it ?
>>>>
>>>> Thank you very much in advance,
>>>>
>>>> Jean-MArie
>>>>
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