Cross-compiling libffi on ppc 603e

Cross-compiling libffi on ppc 603e

[Frédéric]

Hi!

I cross-compiled Python 2.5.3 for an embedded VME card running a 32bits ppc
603e processor:

    http://www.dpie.com/vme/cpu-powerpc/men-mikro-a15c

All worked fine, except the _ctypes python module, using libffi, which
failed with the following error:

In file included from Modules/_ctypes/libffi/src/prep_cif.c:26:
build/temp.linux2-powerpc-2.7/libffi/include/ffi.h:153:
  #error "no 64-bit data type supported"

(python 2.5.3 uses libffi 3.0.13).

Any idea why I can't cross-compile on this platform? I can see that ppc
32bits is supported. I may need to give an additional env. var. to my
toolchain?

Thanks for your help.

-- 
    Frédéric

Re: Cross-compiling libffi on ppc 603e

[Frédéric]

Le 03/02/2016, Frédéric a écrit :

> I cross-compiled Python 2.5.3 for an embedded VME card running a 32bits
> ppc 603e processor:
> 
>     http://www.dpie.com/vme/cpu-powerpc/men-mikro-a15c
> 
> All worked fine, except the _ctypes python module, using libffi, which
> failed with the following error:
> 
> In file included from Modules/_ctypes/libffi/src/prep_cif.c:26:
> build/temp.linux2-powerpc-2.7/libffi/include/ffi.h:153:
>   #error "no 64-bit data type supported"
> 
> (python 2.5.3 uses libffi 3.0.13).
> 
> Any idea why I can't cross-compile on this platform? I can see that ppc
> 32bits is supported. I may need to give an additional env. var. to my
> toolchain?

No idea?

-- 
    Frédéric

Re: Cross-compiling libffi on ppc 603e

[Andrew Haley]

On 09/02/16 08:02, Frédéric wrote:
>> > Any idea why I can't cross-compile on this platform? I can see that ppc
>> > 32bits is supported. I may need to give an additional env. var. to my
>> > toolchain?
> No idea?

Look for where FFI_LONG_LONG_MAX is defined.  Check that it is correct.
Patch if necessary.  Send us the patch.

Thanks,

Andrew.

Re: Cross-compiling libffi on ppc 603e

[Frédéric]

Le 09/02/2016, Andrew a écrit :

> Look for where FFI_LONG_LONG_MAX is defined.  Check that it is correct.
> Patch if necessary.  Send us the patch.

There is something I don't understand: how could the lib be compiled on a
32bits system if FFI_LONG_LONG_MAX must equals FFI_64_BIT_MAX?

-- 
    Frédéric

Re: Cross-compiling libffi on ppc 603e

[Andrew Haley]

On 09/02/16 12:44, Frédéric wrote:
> There is something I don't understand: how could the lib be compiled on a
> 32bits system if FFI_LONG_LONG_MAX must equals FFI_64_BIT_MAX?

Most, if not all, 32-bit systems have some kind of 64-bit integer
type which occupies two machine words.

Andrew.