Re: [Discuss-gnuradio] Error Linking UHD

[Gilad Beeri (ApolloShield)]

Yay, it works!

Thank you, Basti and Marcus :)

So the only change I needed to make for my build system is to find the first target_link_libraries() under lib/CMakeLists.txt and add both ${GNURADIO_ALL_LIBRARIES} and uhd to the list (both are required). I did not have to add anything to the link list of the test project, nor did I have to add UHD to the GR_REQUIRED_COMPONENTS list in the root CMakeLists.txt.

Thanks again!

On Wed, Jun 20, 2018 at 3:00 PM Müller, Marcus (CEL) <address@hidden> wrote:

Basti applied hammer to nail's head. It's (probably) super effective.

yeah... time_spec_t's functions aren't exported symbols of libgnuradio-
uhd, but of libuhd! This might work on some and not on other build
systems due to different handling of visibility of symbols *used* in a
library. uff!

On Wed, 2018-06-20 at 11:04 +0100, Bastian Bloessl wrote:
> Any chances you are confusing libgnuradio-uhd.so with libuhd.so. To me
> it sounds like you want to link against the latter.
>
> Maybe some linkers resolve symbols from libuhd through libgnuradio-uhd
> and some don't (which might make sense if you do not use any symbols
> defined in libgnuradio-uhd).
>
> Best,
> Bastian
>
> On 6/19/2018 13:27, Gilad Beeri (ApolloShield) wrote:
> > The MESSAGE directive shows it should be ok - added to
> > lib/CMakeLists.txt, after the first target_link_libraries(), the line
> > "MESSAGE(STATUS "DEBUG GR LIBS: ${GNURADIO_ALL_LIBRARIES}")".
> >
> > The output:
> > /
> > /
> > /-- DEBUG GR LIBS:
> > /home/user/gr/lib/libgnuradio-runtime.so;/home/user/gr/lib/libgnuradio-pmt.so;/usr/lib/liblog4cpp.so;/home/user/gr/lib/libgnuradio-filter.so;/home/user/gr/lib/libgnuradio-fft.so;/home/user/gr/lib/libgnuradio-uhd.so/
> > /
> > /
> > I moved away all cmake/ files and then put them back one-by-one until
> > the build succeeded, which meant I ended up removing:
> >   D cmake/Modules/CMakeParseArgumentsCopy.cmake
> >   D cmake/Modules/FindGnuradioRuntime.cmake
> >   D cmake/Modules/GrMiscUtils.cmake
> >   D cmake/Modules/GrPython.cmake
> >   D cmake/Modules/GrSwig.cmake
> >   D cmake/Modules/GrTest.cmake
> >   D cmake/Modules/UseSWIG.cmake
> >
> > but still no luck (the undefined symbol error still exists).
> >
> > It might be worth to mention, the version I use is 3.7.11.1.
> >
> >
> > On Tue, Jun 19, 2018 at 2:47 PM Müller, Marcus (CEL) <address@hidden
> > <mailto:address@hidden>> wrote:
> >
> >     add a "message ()" directive that prints the GNURADIO_ALL_LIBRARIES
> >     that is actually used in your lib/CMakeLists.txt. If that is wrong:
> >
> >     Move your OOT's cmake/Modules/* out of the way – I do not endorse the
> >     fact that we're distributing copies of all the GNU Radio CMake scripts
> >     with our OOT template, as these might outdate locally.
> >
> >     I must admit I don't have an OOT where I test gr-uhd linkage myself.
> >
> >     Best regards,
> >     Marcus
> >
> >     On Tue, 2018-06-19 at 14:42 +0300, Gilad Beeri (ApolloShield) wrote:
> >      > I've done "rm -rf build/*" and "pushd build; cmake  ../; and make
> >     -j7; and make install; popd" ~ 50 times since yesterday :)
> >      >
> >      > Any suggestions for debugging it?
> >      >
> >      > On Tue, Jun 19, 2018 at 2:33 PM Müller, Marcus (CEL)
> >     <address@hidden <mailto:address@hidden>> wrote:
> >      > > I must admit this is surprising to me, as the line of code where
> >      > > LIBS=... is printed is pretty integrally coupled to the line that
> >      > > specifies what GNURADIO_ALL_LIBRARIES is. Maybe CMake got confused?
> >      > > I know this is kind of a "haveyoutriedturningitoffandonagain"
> >     answer,
> >      > > but have you tried completely rm'ing your build/ directory and
> >     letting
> >      > > CMake run anew?
> >      > >
> >      > > Best regards,
> >      > > Marcus
> >      > >
> >      > > :e ../cmake/Modules/FindG               On Tue, 2018-06-19 at
> >     14:19 +0300,
> >      > > Gilad Beeri (ApolloShield) wrote:
> >      > > > I have a similar problem as described in
> >     https://lists.gnu.org/archive/html/discuss-gnuradio/2015-05/msg00195.html.
> >      > > >
> >      > > > When I try to run tests (with Python), I get:
> >      > > >
> >      > > > Traceback (most recent call last):
> >      > > >   File "python/myblock.py", line 12, in <module>
> >      > > >     from myproj.myproj_swig import mitigation_source
> >      > > >   File
> >     "/home/user/gr/lib/python2.7/site-packages/myproj/myproj_swig.py",
> >     line 28, in <module>
> >      > > >     _myproj_swig = swig_import_helper()
> >      > > >   File
> >     "/home/user/gr/lib/python2.7/site-packages/myproj/myproj_swig.py",
> >     line 24, in swig_import_helper
> >      > > >     _mod = imp.load_module('_myproj_swig', fp, pathname,
> >     description)
> >      > > > ImportError:
> >     /home/user/gr/lib/libgnuradio-myproj-1.0.0git.so.0.0.0: undefined
> >     symbol: _ZN3uhd11time_spec_tC1Eld
> >      > > >
> >      > > >
> >      > > > I did add "UHD" to the line starting with
> >     "set(GR_REQUIRED_COMPONENTS" (in my root CMakeLists.txt) so I get
> >     the output of
> >      > > >
> >      > > > Checking for GNU Radio Module: UHD
> >      > > > -- Checking for module 'gnuradio-uhd'
> >      > > > --   Found gnuradio-uhd, version 3.7.11.1-as
> >      > > >  * INCLUDES=/home/user/gr/include
> >      > > >  *
> >     LIBS=/home/user/gr/lib/libgnuradio-uhd.so;/home/user/gr/lib/libgnuradio-runtime.so;/home/user/gr/lib/libgnuradio-pmt.so;/usr/lib/liblog4cpp.so
> >      > > > -- Found GNURADIO_UHD:
> >     /home/user/gr/lib/libgnuradio-uhd.so;/home/user/gr/lib/libgnuradio-runtime.so;/home/user/gr/lib/libgnuradio-pmt.so;/usr/lib/liblog4cpp.so
> >
> >      > > > GNURADIO_UHD_FOUND = TRUE
> >      > > >
> >      > > > I also have in my lib/CMakeLists.txt file
> >     ${GNURADIO_ALL_LIBRARIES} in both target_link_libraries() lists.
> >      > > >
> >      > > > I have "#include <uhd/types/time_spec.hpp>" in my header file.
> >      > > >
> >      > > > But for some reason, it doesn't seem to link gnuradio-uhd:
> >      > > >
> >      > > > readelf -d /home/user/gr/lib/libgnuradio-myproj-1.0.0git.so.0.0.0
> >      > > >
> >      > > >  0x0000000000000001 (NEEDED)             Shared library:
> >     [libboost_system.so.1.58.0]
> >      > > >  0x0000000000000001 (NEEDED)             Shared library:
> >     [libgnuradio-runtime-3.7.11.1-as.so.0.0.0]
> >      > > >  0x0000000000000001 (NEEDED)             Shared library:
> >     [libgnuradio-pmt-3.7.11.1-as.so.0.0.0]
> >      > > >  0x0000000000000001 (NEEDED)             Shared library:
> >     [liblog4cpp.so.5]
> >      > > >  0x0000000000000001 (NEEDED)             Shared library:
> >     [libgnuradio-filter-3.7.11.1-as.so.0.0.0]
> >      > > >  0x0000000000000001 (NEEDED)             Shared library:
> >     [libstdc++.so.6]
> >      > > >  0x0000000000000001 (NEEDED)             Shared library:
> >     [libm.so.6]
> >      > > >  0x0000000000000001 (NEEDED)             Shared library:
> >     [libgcc_s.so.1]
> >      > > >  0x0000000000000001 (NEEDED)             Shared library:
> >     [libc.so.6]
> >      > > >  0x000000000000000e (SONAME)             Library soname:
> >     [libgnuradio-myproj-1.0.0git.so.0.0.0]
> >      > > > _______________________________________________
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> >
> >
> >
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