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

[Robert L. <rob...@gm...>]

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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>> --
>> View this message in context: http://old.nabble.com/Cross-compiling-fro-ARM-tp27234882p34813193.html
>> Sent from the JamVM mailing list archive at Nabble.com.
>>
>>
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