cmake error

asked 2020-03-19 20:54:48 -0500

mohamed3020
1 ●1 ●3 ●2

updated 2020-03-20 05:15:05 -0500

gvdhoorn
86574 ●283 ●1432 ●1054 http://cor.tudelft.nl/

I have this message will trying the first package please guide me as an absolute beginner THIS IS the output of CMake

mohamed@mohamed:~$ cd ~/catkin_ws
mohamed@mohamed:~/catkin_ws$ catkin_make
Base path: /home/mohamed/catkin_ws
Source space: /home/mohamed/catkin_ws/src
Build space: /home/mohamed/catkin_ws/build
Devel space: /home/mohamed/catkin_ws/devel
Install space: /home/mohamed/catkin_ws/install
####
#### Running command: "make cmake_check_build_system" in "/home/mohamed/catkin_ws/build"
####
-- Using CATKIN_DEVEL_PREFIX: /home/mohamed/catkin_ws/devel
-- Using CMAKE_PREFIX_PATH: /opt/ros/kinetic
-- This workspace overlays: /opt/ros/kinetic
-- Found PythonInterp: /usr/bin/python3 (found suitable version "3.5.2", minimum required is "2") 
-- Using PYTHON_EXECUTABLE: /usr/bin/python3
-- Using Debian Python package layout
-- Using empy: /usr/bin/empy
-- Using CATKIN_ENABLE_TESTING: ON
-- Call enable_testing()
-- Using CATKIN_TEST_RESULTS_DIR: /home/mohamed/catkin_ws/build/test_results
-- Found gtest sources under '/usr/src/gmock': gtests will be built
-- Found gmock sources under '/usr/src/gmock': gmock will be built
-- Found PythonInterp: /usr/bin/python3 (found version "3.5.2") 
-- Using Python nosetests: /usr/bin/nosetests-2.7
ImportError: "from catkin_pkg.package import parse_package" failed: No module named 'catkin_pkg'
Make sure that you have installed "catkin_pkg", it is up to date and on the PYTHONPATH.
CMake Error at /opt/ros/kinetic/share/catkin/cmake/safe_execute_process.cmake:11 (message):
  execute_process(/usr/bin/python3
  "/opt/ros/kinetic/share/catkin/cmake/parse_package_xml.py"
  "/opt/ros/kinetic/share/catkin/cmake/../package.xml"
  "/home/mohamed/catkin_ws/build/catkin/catkin_generated/version/package.cmake")
  returned error code 1
Call Stack (most recent call first):
  /opt/ros/kinetic/share/catkin/cmake/catkin_package_xml.cmake:74 (safe_execute_process)
  /opt/ros/kinetic/share/catkin/cmake/all.cmake:168 (_catkin_package_xml)
  /opt/ros/kinetic/share/catkin/cmake/catkinConfig.cmake:20 (include)
  CMakeLists.txt:56 (find_package)


-- Configuring incomplete, errors occurred!
See also "/home/mohamed/catkin_ws/build/CMakeFiles/CMakeOutput.log".
See also "/home/mohamed/catkin_ws/build/CMakeFiles/CMakeError.log".
Makefile:528: recipe for target 'cmake_check_build_system' failed
make: *** [cmake_check_build_system] Error 1
Invoking "make cmake_check_build_system" failed

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First I would try running the following command: pip install catkin_pkg

please do not suggest people to use pip to install Python dependencies. Or at least, not without mentioning all the disadvantages, and the fact that it should not be necessary on platforms for which there are binary packages available (such as Debian and Ubuntu).

On Debian/Ubuntu, sudo apt install python3-catkin-pkg should work.

Either ROS is trying to use Python 3 instead of 2

from the error output, it looks like this is the case.

gvdhoorn ( 2020-03-20 05:18:52 -0500 )edit

Ah sorry about that I didn't know. Is that just for ROS specific python packages or is that best practice for installing all python packages?

roshea6 ( 2020-03-20 16:16:08 -0500 )edit

I did that but didn't solved

mohamed3020 ( 2020-03-20 19:02:22 -0500 )edit

It seems like ROS is trying to use python 3 instead of 2 then. First I would make sure that you have python 2 installed on your system. If it is then try making your workspace with following addition: -DPYTHON_EXECUTABLE=/usr/bin/python2

or just do python instead of python2.

roshea6 ( 2020-03-20 22:50:50 -0500 )edit

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