Hi Marcus,
Sorry about the pictures, I will use text later on :)
After adding the gnuradio-runtime, the top-block line works with no errors.
But the gr::uhd::usrp_source::sptr usrp_source =
gr::uhd::usrp_source::make(device_addr, uhd::stream_args_t("fc32")); stills
has error:
/usr/bin/ld: CMakeFiles/tags.dir/tags.cc.o: undefined reference to symbol
'_ZN3uhd13device_addr_tC1ERKSs'
//usr/local/lib/libuhd.so.003: error adding symbols: DSO missing from
command line
Thanks,
Zhihong
On Fri, Feb 5, 2016 at 4:39 AM, Marcus Müller <marcus.muel...@ettus.com>
wrote:
> Hi Zhihong,
>
> please stop posting screenshots of text. It's text, you can mark it, copy
> it, and paste it to an email as text. It's way easier for everyone to deal
> with that.
>
> Now, you've used
>
> target_link_libraries(tags gnuradio-uhd boost_system)
>
>
> which links the target "tags" against the libraries "gnuradio-uhd" and
> "boost_system".
> Now, the error you're getting is that the linker can't find things related
> to top_block.
> Point is that top_block belongs to the GNU Radio run-time. Hence, the
> error should be pointing you in the right direction: what you actually need
> to do is
>
> target_link_libraries(tags *gnuradio-runtime* gnuradio-uhd boost_system)
>
>
> Best regards,
> Marcus
>
> On 05.02.2016 06:39, Zhihong Luo wrote:
>
> Hi,
>
> I created an OOT module, added the UHD into the required components and
> added the following lines in the top-level CMakelist.txt and the
> CMakelist.txt under the apps folder.
>
>
>
> The tesr.cc just makes a top_block: gr::top_block_sptr tb =
> gr::make_top_block("tags"),
> which leads to undefined reference.
>
> If I add another line "gr::uhd::usrp_source::sptr usrp_source =
> gr::uhd::usrp_source::make(device_addr, uhd::stream_args_t("fc32")); ", the
> error is:
>
>
> I think it is a linker problem, but I can not find what I am missing. Is
> there anyone who could help me fix this?
>
> Thanks,
> Zhihong
>
> On Thu, Feb 4, 2016 at 9:34 AM, Zhihong Luo <zh...@umich.edu> wrote:
>
>> Hi Tom,
>>
>> Thank you for the advice. The website seems to be really useful.
>>
>> Zhihong
>>
>>
>> 2016年2月4日星期四，Tom Rondeau < <t...@trondeau.com>t...@trondeau.com> 写道：
>>
>>> On Wed, Feb 3, 2016 at 8:28 PM, Zhihong Luo <zh...@umich.edu> wrote:
>>>
>>>> Hi Marcus,
>>>>
>>>> Can you be more specific about what I need to add to the
>>>> CMakeLists.txt? Because in the <modulename>/apps/CMakeLists.tx, there is no
>>>> "sources", but only:
>>>>
>>>> include(GrPython)
>>>>
>>>> GR_PYTHON_INSTALL(
>>>> PROGRAMS
>>>> DESTINATION bin
>>>> )
>>>>
>>>> And in the <modulename>/CMakeLists.txt, what do you mean by "Add "uhd"
>>>> to the list"? Is it "find_package(UHD)"? Or things like including
>>>> ${UHD_INCLUDE_DIRS} ${GR_UHD_INCLUDE_DIRS}
>>>> to the directory? I try to learn from the built-in gr-uhd, but there is
>>>> no apps folder and its CMakeList.txt looks very different. So I was lost.
>>>>
>>>> I am really unfamiliar with these, so more detailed explanation will be
>>>> much appreciated. Thanks.
>>>>
>>>> Zhihong Luo
>>>>
>>>
>>>
>>> We appreciate your enthusiasm for use GNU Radio and building stuff with
>>> it. However, the questions you are asking are more related to C++,
>>> makefiles, and CMake. I think you'd be better off studying those and
>>> learning the basics before asking questions like that here.
>>>
>>> Another tactic you can take is to look at all of the projects available
>>> on cgran.org as well as look at the GNU Radio source code itself. We
>>> have lots of examples out there that you can learn from to do what you want
>>> here.
>>>
>>> Tom
>>>
>>>
>>>
>>>
>>>> On Wed, Feb 3, 2016 at 3:56 AM, Zhihong Luo <zh...@umich.edu> wrote:
>>>>
>>>>> Hi Marcus,
>>>>>
>>>>> Thank you for the detailed instructions! I'll test it tomorrow and
>>>>> hopefully it can work :) Have a good night.
>>>>>
>>>>> Zhihong
>>>>>
>>>>>
>>>>> 2016年2月3日星期三，Marcus Müller <marcus.muel...@ettus.com> 写道：
>>>>>
>>>>>> Hi Zhihong Luo,
>>>>>>
>>>>>> you're not linking your program against any GNU Radio component,
>>>>>> which is why the linker step in your compiler call complains about all
>>>>>> the
>>>>>> symbols from these libraries missing.
>>>>>> Normally, it's the job of a build system to set up your compiler call
>>>>>> correctly, but in this case, somethin like
>>>>>>
>>>>>> g++ tags.cpp -o tags $(pkg-config --libs --cflags gnuradio-runtime
>>>>>> gnuradio-uhd)
>>>>>>
>>>>>> should work.
>>>>>>
>>>>>> I'd still recommend not doing that, but using gr_modtool to create a
>>>>>> new out-of-tree module
>>>>>>
>>>>>> gr_modtool newmod
>>>>>>
>>>>>> and add your file in the <modulename>/apps/ folder, adding the
>>>>>> filename to <modulename>/apps/CMakeLists.txt under "sources". Add "uhd"
>>>>>> to
>>>>>> the list of necessary GNU Radio components in <modulename>/CMakeLists.txt
>>>>>>
>>>>>> Then, it's the normal CMake build procedure:
>>>>>>
>>>>>> cd <modulename>
>>>>>> mkdir build
>>>>>> cd build
>>>>>> cmake ..
>>>>>> make
>>>>>> make install
>>>>>>
>>>>>> On 03.02.2016 09:39, Zhihong Luo wrote:
>>>>>>
>>>>>> Hi Marcus,
>>>>>>
>>>>>> Sorry, I was typing and accidentally sent it out the previous one...
>>>>>> The code is
>>>>>>
>>>>>> #include<gnuradio/top_block.h>
>>>>>> #include<gnuradio/uhd/usrp_source.h>
>>>>>> #include<uhd/utils/safe_main.hpp>
>>>>>> #include <boost/make_shared.hpp>
>>>>>> #include <boost/thread/thread.hpp>
>>>>>> #include <boost/program_options.hpp>
>>>>>> #include <csignal>
>>>>>> #include <iostream>
>>>>>>
>>>>>> namespace po = boost::program_options;
>>>>>> int UHD_SAFE_MAIN(int argc, char *argv[]){ std::string device_addr
>>>>>> =" ";
>>>>>>
>>>>>> gr::top_block_sptr tb = gr::make_top_block("tags_demo");
>>>>>>
>>>>>> gr::uhd::usrp_source::sptr usrp_source =
>>>>>> gr::uhd::usrp_source::make(device_addr,
>>>>>> uhd::stream_args_t("fc32")); }
>>>>>>
>>>>>> Then I ran the command:
>>>>>> g++ tags.cpp -o tags -l boost_system
>>>>>>
>>>>>> which ends up having errors:
>>>>>>
>>>>>> undefined reference to gr::make_top_block, uhd::device_addr_t,
>>>>>> gr::uhd::usrp_source and etc.
>>>>>>
>>>>>> Thanks,
>>>>>> Zhihong Luo
>>>>>>
>>>>>> On Wed, Feb 3, 2016 at 4:29 PM, Zhihong Luo <zh...@umich.edu> wrote:
>>>>>>
>>>>>>> Hi Marcus,
>>>>>>>
>>>>>>> Of course. Here are the codes:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Wed, Feb 3, 2016 at 4:13 PM, Marcus Müller <
>>>>>>> marcus.muel...@ettus.com> wrote:
>>>>>>>
>>>>>>>> Hi Zhihong Luo,
>>>>>>>>
>>>>>>>> could you please rather share text than pictures of text, too small
>>>>>>>> for reading?
>>>>>>>>
>>>>>>>> Best regards,
>>>>>>>> Marcus
>>>>>>>>
>>>>>>>>
>>>>>>>> On 03.02.2016 07:31, Zhihong Luo wrote:
>>>>>>>>
>>>>>>>> Hi all,
>>>>>>>>
>>>>>>>> I just started to learn to use c++ for gnuradio, and I copied some
>>>>>>>> codes from the "tags_demo.cc". But compilation error occurred as shown
>>>>>>>> in
>>>>>>>> the following screen shots. Can you tell me where I made a mistake?
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>> Zhihong Luo
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Discuss-gnuradio mailing
>>>>>>>> listDiscuss-gnuradio@gnu.orghttps://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
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>>>>>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>
>>>> _______________________________________________
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>>>>
>>>>
>>>
>
>
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