Re: [Discuss-gnuradio] The AttributeError problem now that I have modified a working OOT

[Tom Early]

Thanks Bastian,

I removed try/except int __init__.py and it gave:

ImportError: /usr/lib/libgnuradio-ambe3000.so: undefined symbol:
_ZN12CDStarHeaderD1Ev

I suspect this is telling about the undeclared destructor for
CDStarHeader, but I think I am to inexperienced to understand the _ZN12
prefix and D1Ev suffix!

Marcus,

Thanks! I removed the offending printf() and added an empty destructor
and can build successfully. Now I know that I have (a lot of) debugging
to do!

Do you have any idea why my system did not complain AT ALL when building
the syncing branch? I am using ubuntu 16.04 with the apt-installed grc
(3.7.9). Do I have some config screwed up somewhere?

Thanks again. I very much appreciate this support!

Tom

On 07/04/2016 05:22 AM, Marcus Müller wrote:
> Hi!
>
> nope, I've tried the master branch only :/
>
> but: syncing fails to build at all for me:
>
> > make
> [  3%] Building CXX object 
> lib/CMakeFiles/gnuradio-ambe3000.dir/dstar_encode_sb_impl.cc.o
> [  6%] Building CXX object lib/CMakeFiles/gnuradio-ambe3000.dir/DV3000U.cc.o
> [  9%] Building CXX object lib/CMakeFiles/gnuradio-ambe3000.dir/DStarHeader.cc.o
> [ 12%] Building CXX object lib/CMakeFiles/gnuradio-ambe3000.dir/DStarDecode.cc.o
> [ 15%] Building CXX object 
> lib/CMakeFiles/gnuradio-ambe3000.dir/dstar_decode_bs_impl.cc.o
> /home/marcus/src/gr-ambe3000/lib/dstar_decode_bs_impl.cc: In constructor 
> ‘gr::ambe3000::dstar_decode_bs_impl::dstar_decode_bs_impl(char*, int)’:
> /home/marcus/src/gr-ambe3000/lib/dstar_decode_bs_impl.cc:48:71: error: ‘printf’ 
> was not declared in this scope
>     printf("%s is %s.\n", device, device_is_closed ? "closed" : "opened");
>                                                                         ^
> lib/CMakeFiles/gnuradio-ambe3000.dir/build.make:158: recipe for target 
> 'lib/CMakeFiles/gnuradio-ambe3000.dir/dstar_decode_bs_impl.cc.o' failed
> make[2]: *** [lib/CMakeFiles/gnuradio-ambe3000.dir/dstar_decode_bs_impl.cc.o] 
> Error 1
> CMakeFiles/Makefile2:137: recipe for target 
> 'lib/CMakeFiles/gnuradio-ambe3000.dir/all' failed
> make[1]: *** [lib/CMakeFiles/gnuradio-ambe3000.dir/all] Error 2
> Makefile:138: recipe for target 'all' failed
> make: *** [all] Error 2
>
> After adding the necessary #include <cstdio> I got a linker error:
>
> libgnuradio-ambe3000.so: undefined reference to `CDStarHeader::~CDStarHeader()'
>
> A-ha! your DStarHeader.h declares a destructor, but you never implement
> it; so either remove that declaration in the header, or add an actual
> implementation!
>
> With those two modifications [1] instantiating ds_decode_bs works on the
> syncing branch for me.
>
> Cheers,
> Marcus
>
> [1]  https://github.com/ac2ie/gr-ambe3000/pull/1
> On 03.07.2016 20:44, Bastian Bloessl wrote:
> > Hi,
> >
> > On 07/03/2016 07:50 PM, Tom Early wrote:
> > > Thanks Marcus, for trying this. I tried what you suggested and there was
> > > no love. I even tried to uninstall, then rm'ed the build folder and
> > > rebuilt, with still no luck. You cloned the "syncing" branch, right? The
> > > "master" branch works fine. I have gone back a couple of times to see if
> > > I could figure out what I broke.
> > IIRC, I had a similar problem and removing the try/except here:
> >
> > https://github.com/ac2ie/gr-ambe3000/blob/master/python/__init__.py#L30
> >
> > showed the actual error message. Maybe you want to try this.
> >
> > Best,
> > Bastian
> >
> > _______________________________________________
> > Discuss-gnuradio mailing list
> > address@hidden
> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio