On Wed, Mar 25, 2015 at 12:37 PM, Udo Schneider <udo.schneider@homeaddress.de> wrote:

I found the offending code. The original code is something like:

�� struct libusb_bos_dev_capability_descriptor *dev_capability
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
�� [] /* valid C99 code */
#else
�� [0] /* non-standard, but usually working code */
#endif
;

This doesn't work with clang/TalkFFI. I assume based on the #defines it uses the C99 notation which doesn't work. "Hardcoding" it to the non-standard notation does work. E.g.:

�� struct libusb_bos_dev_capability_descriptor *dev_capability
//#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
//�� [] /* valid C99 code */
//#else
�� [0] /* non-standard, but usually working code */
//#endif
;

It seems that this was the only showstopper as TalkFFI just generated a binding for the whole library w/o any problem.

I'll start experimenting now ...

CU,

Udo

On 24/03/15 17:33, kilon alios wrote:

If the library is big you can use TalkFFI (you will find it in
smalltalkhub) that automates the wrapping with nativeboost.

On Tue, Mar 24, 2015 at 4:58 PM, Udo Schneider
<Udo.Schneider@homeaddress.de
<mailto:Udo.Schneider@homeaddress.de>> wrote:

�� I guess not :-)

�� I'll try to wrap libUSB then.

�� I assume the future-proof way to use "a" FFI framework is to use the
�� NB notation? Do I remember correctly that the NB notation is
�� supposed to remain the same although the backend will change to
�� something more like traditional FFI?
�� So using NB notation w/o relying on the code generation is safe,
�� correct?

�� CU,

�� Udo

�� On 23.03.2015 16:15, Udo Schneider wrote:

�� All,

�� does anybody have some code or plugin to access USB ports with
�� Pharo?
�� Maybe something using libUSB or OpenUSB?

�� Thanks,

�� Udo