Re: [Discuss-gnuradio] Attribute error: and support with external class and header files

[Dave NotTelling]

Is it safe to add the c++11 flag?  I was under the impression that the GNU Radio build system didn't use c++11 for a reason.  If that's not the case then I'll start using c++11 too :D

On Tue, Aug 30, 2016 at 4:25 AM, Pranav Padalkar <address@hidden> wrote:

Good Morning everyone,

I figured out how to add my own source files in GNURadio and also how to add support for external libraries, in my case it was for Protobuf. I will just write a note here, hoping that it will help someone in the future.

1. I placed all of my own .h and .cpp files in the "lib" folder of my module, along with the "impl.cc" files.

2. I edited "CMakeLists.txt" of the "lib" folder; in that I added all of my own .cpp file names in "Setup library" section in the statement " list(APPEND ...) ".

To add C++11 flag -

1. I edited "CMakeLists.txt" in the home folder of my module (i.e. gnuradio/gr-modulename/CMakeLists.txt); in that I added a command set(CMAKE_CXX_FLAGS "-std=c++11") in "Compiler specific setup" section after add_definitions().

To add external libraries, in my case Protobuf -

1. I edited "CMakeLists.txt" in the "lib" folder of my module.

2. In "Setup library" section, i added some commands to find the library I am looking for and then added them in "include_directories()" and in "link_directories()".

include(FindProtobuf)
find_package(Protobuf REQUIRED)

include_directories(${Boost_INCLUDE_DIR} ${Protobuf_INCLUDE_DIRS})
link_directories(${Boost_LIBRARY_DIRS} ${Protobuf_LIBRARIES})

target_link_libraries(gnuradio-modulename ${Boost_LIBRARIES} ${GNURADIO_ALL_LIBRARIES} ${Protobuf_LIBRARIES})

 After doing this it works for me now and I don't get attribute error which was happening because of my source files and libraries not being linked.

Regards,

Pranav Padalkar

Fraunhofer-Institut für Eingebettete Systeme und Kommunikationstechnik ESK

 

---

From: Discuss-gnuradio <discuss-gnuradio-bounces+pranav.padalkar=esk.address@hidden> on behalf of Pranav Padalkar <address@hiddenfraunhofer.de>
Sent: Wednesday, August 24, 2016 9:19 AM
To: Dave NotTelling
Cc: address@hidden
Subject: Re: [Discuss-gnuradio] Attribute error: and support with external class and header files

 

Hi Dave,

 

Thanks for your reply. Actually I figured out the problem. After going through the files of the already existing blocks, especially the CMakeLists.txt, I figured out where I need to add my own header files. I added entries of all the class files in the CMakeLists.txt inside “lib” folder. I am not sure if this has solved the problem, but at least it is compiling now. Currently I am facing the problem of how to make the GnuRadio compiler to get the C++11 flag. I know it has to be added to the CMake file, but I am not sure where exactly. If anyone knows about this, then kindly let me know. I also need to include other libraries like pthread, libboost_filesystem, etc.

 

Thanks and Regards,

Pranav

 

Von: Dave NotTelling [mailto:address@hidden]
Gesendet: Dienstag, 23. August 2016 18:50
An: Pranav Padalkar
Cc: address@hidden
Betreff: Re: [Discuss-gnuradio] Attribute error: and support with external class and header files

 

I've had bad luck just putting my own headers in OOT modules.  The way I do things now is to use gr_modtool add and select 'noblock'.  Then just remove the grc XML file created.  Seems that YourModuleName_API is needed before structs and classes or it doesn't get seen by Swig.  Could be wrong about that.  Might just work for me on a fluke =\

 

On Tue, Aug 23, 2016 at 6:47 AM, Pranav Padalkar <address@hiddenfraunhofer.de> wrote:

Hello all,

 

I have written a c++ code and I wish to implement as a block in GNURadio. I created a module (named "newblocks") and a block (named "my_client) and made appropriate changes. The thing is, I have many class and header files for my c++ code, for eg. Protobuf. I put those files in a folder called "client" inside "include" folder of my module (gr-newblocks/include/newblocks/client). It showed no error during cmake, make, make install and ldconfig. But when I put the block in the flowgraph and run it, it gives me following error.

 

File "/home/sdr/workspace/develop/Pranav/USRP_client/usrp_client.py", line 115, in __init__
    self.newblocks_my_client_0 = newblocks.my_client("123", "8080")
AttributeError: 'module' object has no attribute 'my_client' 

 

I already had a working block in the same module, which I had created earlier. And now even that block gives me same error. If I don't use any of the two blocks, the flowgraph works fine.

 

I, then, also added a CMakeLists.txt file in that "client" folder and entered all the .h and .c files in the text file. I added the entry for "client" folder in the "Add subdirectories" part of the CMakeLists.txt in (gr-newblocks/ ). Is there anything else I need to do in order to use my own class and header files? Do I also need to put the .o files along with the header and class files? I tried with both, putting the .o files and not putting them, it still shows the same error.

I even created a new module and a new block and copy pasted my code and header and class files. I still get the same error. I kindly ask for help in this regard. I am using Ubuntu 14.04 LTS, GnuRadio 3.7.9.2, I am using a lot of Boost 1.61.

 

Thank you in advance.

Best Regards,

Pranav Padalkar

Fraunhofer-Institut für Eingebettete Systeme und Kommunikationstechnik ESK

 

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