[Buildroot] [PATCH] libusb: add an option to compile examples

["Gaël PORTAY" <gael.portay@savoirfairelinux.com>]

Hi Baruch,

On Sun, Jun 10, 2018 at 05:35:29PM +0300, Baruch Siach wrote:
> > diff --git a/package/libusb/libusb.mk b/package/libusb/libusb.mk
> > index aee3622f8d..89ec91bb42 100644
> > --- a/package/libusb/libusb.mk
> > +++ b/package/libusb/libusb.mk
> > @@ -25,5 +25,16 @@ else
> >  LIBUSB_CONF_OPTS += --disable-udev
> >  endif
> >  
> > +ifeq ($(BR2_PACKAGE_LIBUSB_EXAMPLES),y)
> > +LIBUSB_CONF_OPTS += --enable-examples-build
> > +define LIBUSB_INSTALL_TARGET_EXAMPLES
> > +	for example in listdevs xusb fxload hotplugtest testlibusb dpfp dpfp_threaded sam3u_benchmark ; do \
> > +		[ -x $(@D)/examples/$${example} ] || continue; \
> 
> Why is this file presence check needed?
>

Because, some of the examples are compiled under HAVE_xxx condition.

See the extract of examples/Makefile.am below.

	noinst_PROGRAMS = listdevs xusb fxload hotplugtest testlibusb
	
	if HAVE_SIGACTION
	noinst_PROGRAMS += dpfp
	
	if THREADS_POSIX
	dpfp_threaded_CFLAGS = $(AM_CFLAGS)
	noinst_PROGRAMS += dpfp_threaded
	endif
	
	sam3u_benchmark_SOURCES = sam3u_benchmark.c
	noinst_PROGRAMS += sam3u_benchmark
	endif

> > +		cp -dpfr $(@D)/examples/$${example} $(TARGET_DIR)/usr/bin; \
> > +	done
> > +endef
> > +LIBUSB_POST_INSTALL_TARGET_HOOKS += LIBUSB_INSTALL_TARGET_EXAMPLES
> > +endif
> > +
> >  $(eval $(autotools-package))
> >  $(eval $(host-autotools-package))
>
> baruch
> 
> -- 
>      http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
> =}------------------------------------------------ooO--U--Ooo------------{=
>    - baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -

Regards,
Gael