Re: Cannot specify link libraries for target "Python::NumPy"

On Ubuntu 18.04, you have to install pybind11 from source.

sudo apt-get purge pybind11-dev

git clone https://github.com/pybind/pybind11

cd pybind11

git checkout v2.4.3 -b tmp

mkdir build

cd build

cmake -DCMAKE_BUILD_TYPE=Release -DPYBIND11_TEST=OFF ../

make

sudo make install

Ron

On 10/27/21 2:10 PM, Chad Spooner wrote:
> Ryan:
>
> Thanks much! That got me past the numpy error and landed me in a
> pybind11 error:
>
> -- Python checking for numpy - found
> -- Python checking for pygccxml - found
> CMake Error at CMakeLists.txt:334 (message):
>   pybind11 version 2.0.1 < 2.4
>
> 2.0.1 is the latest from 'apt-get install pybind11'. I saw some stuff
> in the git 'issues' but not sure how to proceed.
>
> I'm taking on building from source because of all the times (dozen?)
> I've attempted installation of UHD and gnuradio, the only successful
> ones are the ones obtained by building from source.
>
> C
>
>
> On 10/27/21 1:39 PM, Ryan Volz wrote:
>> Hi Chad,
>>
>> You'll find a fix here, along with a link to the relevant bug report:
>> https://github.com/gnuradio/gnuradio/pull/5256
>>
>> It's an unanticipated problem with the older version of CMake used
>> with Ubuntu 18.04, but the fix will be in the next release.
>>
>> Cheers,
>> Ryan
>>
>> On 10/27/21 2:50 PM, Chad Spooner wrote:
>>> All:
>>>
>>> I'm building gnuradio from source on an Ubuntu 18.04.6 system.
>>>
>>> I'm using the instructions from:
>>> https://wiki.gnuradio.org/index.php/InstallingGR#From_Source
>>>
>>> When I get to the step:
>>>
>>>     # Note: In the following command, you can add
>>> -DCMAKE_INSTALL_PREFIX=XXX to install GNU Radio into the PREFIX XXX;
>>> if not specified, then the PREFIX is /usr/local. See other CMake
>>> options in Common cmake flags.
>>>
>>>     cmake -DCMAKE_BUILD_TYPE=Release
>>> -DPYTHON_EXECUTABLE=/usr/bin/python3 ../
>>>
>>> I get an error relating to numpy:
>>>
>>>     -- User set python executable /usr/bin/python3
>>>     CMake Error at cmake/Modules/GrPython.cmake:101
>>> (target_link_libraries):
>>>        Cannot specify link libraries for target "Python::NumPy"
>>> which is not built
>>>        by this project.
>>>     Call Stack (most recent call first):
>>>        CMakeLists.txt:318 (include)
>>>
>>>     -- Configuring incomplete, errors occurred!
>>>
>>> numpy is installed and I can 'import numpy' successfully in python3.
>>> (In fact I had issued "apt-get install *numpy*" previously and it
>>> was successful.)
>>>
>>> I tried finding this error in my archive of gnuradio discussion-list
>>> emails, but came up empty, as did my google search.
>>>
>>> Any advice?
>>>
>>> Thanks,
>>>
>>> C
>>>
>>>
>>> --
>>> Chad M. Spooner, PhD
>>> NorthWest Research Associates
>>> 301 Webster Street
>>> Monterey, CA 93940
>>> cmspooner@nwra.com
>>> 831 582 4904
>>> cyclostationary.blog
>>>
>>