Re: [Discuss-gnuradio] undefined symbol: _ZNK7QwtPlot5printEP8QPainterRK5QRectRK18QwtPlotPrintFilter

[Murphy, John]

Yep, since luckily it was a fresh Kubuntu install, and since the bit
of a tangle with apt-get (and some other package manager issues I have
read about), I just wiped the machine with a fresh Fedora 20 KDE spin
install and rebuilt gnuradio and everything works fine.
I did look back at the mailing list archives over the weekend when I
had some time and found Richard Bell had a similar issue around
January 26-29 of 2015.
But I am up and running again and the future's so bright I gotta wear shades.
Thanks.

John Murphy
address@hidden


On Mon, Jun 15, 2015 at 9:31 AM, Tom Rondeau <address@hidden> wrote:
> On Fri, Jun 12, 2015 at 12:35 PM, Murphy, John <address@hidden>
> wrote:
>>
>> Not sure which prereq lib it was anymore - it was a couple days ago
>> and I thought I had gone past the problem. I could guess it was
>> something libqwt5 maybe? And it was a case of a failure to overwrite
>> the deb archive of which there a ton of examples on the web, almost
>> always resolved using the force overwrite option in apt-get and then
>> doing the apt-get -f install to execute the install and clean it up.
>>
>> From what I recall, what happened looked remarkably similar to this I
>> see on google...
>> http://osdir.com/ml/ubuntu-bugs/2015-05/msg01014.html
>> ...except this happened when the build-gnuradio script was running.
>>
>> This was literally a case of take a brand new machine never had
>> anything on it, install from the current Kubuntu 15.04 iso checked for
>> the hash etc, download build-gnuradio from sbrac, run build-gnuradio.
>> And I got the apt-get issue.
>> I am for all purposes new to apt-get (last time was beyond my
>> ever-approaching memory horizon), and I guess I have been fortunate
>> enough to have never seen yum trip over its own feet like this, knock
>> on wood.
>>
>> John
>
>
> Ok, so given all of this, my guess is that there's a version mismatch in the
> QWT library(ies) you have installed. Looks like cmake is finding a version
> but linking against another version.
>
> You'll want to try and clean out all of your QWT installs. Then it might be
> easier to just install QWT yourself. If you do so, use the latest version
> (6.1.2).
>
> Tom
>