Re: [Discuss-gnuradio] Linking gr-digital in OOT Module (Success on OSX, fails on Linux)

[Michael Dickens]

Hi Paul - You are correct that adding "DIGITAL" as you write should add
that component in for headers and library linking. Did you clean the
build directory after changing this setting? Sometimes CMake won't redo
the linkage internally, and one just has to "rm -rf" the whole build
directory and start from go. Hope this is useful. - MLD

On Sat, Nov 12, 2016, at 02:55 PM, Garver, Paul W wrote:
> I’ve got an out-of-tree module which uses gr-trellis and gr-digital. In
> the root OOT module directory’s CMakeLists.txt I’ve added:
> 
> set(GR_REQUIRED_COMPONENTS RUNTIME TRELLIS DIGITAL)
> 
> I’ve got a Mac OS X and Linux setup. On the MAC setup ( GR
> v3.7-MacPorts-devel-git-e106376b(20160809)), the OOT module compiles and
> executes as expected. However, on the Linux setup (GR
> v3.7.10.1-144-g7b0dfd80) I get the "AttributeError:’module’ object has no
> attribute” error.
> 
> Running a Python session on Linux, importing the OOT module, and doing
> dir() yields none of the functions in the OOT module.
> 
> The odd thing is that the OS X compilation is clearly linking
> libgnuradio-digital as found by
> # otool -L 
> 
> BUT using ldd on the Linux compiled version does NOT show linking to
> libgnuradio-digital
> 
> I’m thinking that not linking gr-digital is causing this issue. It is the
> exact same code. My understanding is that adding DIGITAL as shown above
> is sufficient for correct linkage, but it isn’t linking in Linux. Is
> there any reason I would need to explicitly add the digital library to
> CMakeLists in lib/?