Hi Bill & Greg,

is not my intend to create panic. Is not problem for me add a lib to my 
system. Perfectly understand that USB have an overall usage in a lot of 
applications.

The message was simple to be intended as advise that a requested lib can 
be not installed as default



Il 24/03/2016 23:13, KI7MT ha scritto:
> Hi Bill,
>
> I'm not seeing this on Ubuntu 14.04 nor 16.04. The only things I'm
> seeing during the Hamlib configure phase is:
>
> -----
> checking for libusb_init in -lusb-1.0... no
> configure: WARNING: libusb_init was not found in libusb-1.0--USB
> backends will be disabled
> -----
>
> Then in the config summary:
> -----
> Enable USB backends             no
> -----
>
> I don't have libudev-dev nor libusb-1.0-0-dev installed. I've not
> checked Windows lately.
>
> libusb-1/.0-0 has a udev depends:
> Depends: libc6 (>= 2.17), libudev1 (>= 183)
>
>
> 73's
> Greg, KI7MT
>
>
> On 03/24/2016 03:44 PM, Bill Somerville wrote:
>> On 24/03/2016 21:24, Alessandro Gorobey wrote:
>>> I have a lot of problems to compile WSJTX in last days.
>>> All start with update of hamlib3, that give no errors, but a lot of
>>> errors in cmake of wsjtx.
>> Hi Sandro,
>>
>> sorry about that. The Hamlib team have switched to using libusb-1.0 for
>> the USB devices which is a good thing as it is available on Windows. I
>> recently (Yesterday) pushed their updates to the integration branch in
>> my Hamlib fork. I need to adjust the INSTALL file with slightly modified
>> instructions. I am a bit surprised that Hamlib is configuring the USB
>> back ends as I did not think that it would without libusb-1.0-dev being
>> installed. I assume you have libusb-1.0-dev installed for some other
>> project. libusb-1.0 depends on libudev and because we statically link
>> all of the upstream -dev packages are needed.
>>
>> There is a problem with the configuration of WSJT-X that I am working on
>> and hope to check in a fix soon.
>>
>> BTW it is not really any use to WSJT-X to have the USB Hamlib drivers as
>> these devices do not provide conventional audio streams unless an SDR
>> program like QUISK or HDSDR is used as an intermediary and in that case
>> QUISK or HDSDR drive the SDR hardware directly.
>>
>> So overall your best option is to disable the USB back ends in Hamlib,
>> unfortunately there does not seem to be a configure option to do that. I
>> will see if I can get the Hamlib team to accept a patch to add a
>> --without-libusb configure option.
>>
>> 73
>> Bill
>> G4WJS.
>>
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>

-- 
73
Sandro
IW3RAB

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