error: cannot convert 'PySliceObject*' to 'PyObject* {aka _object*}' for argument '1' to 'int PySlice_GetIndices(PyObject*, Py_ssize_t, Py_ssize_t*, Py_ssize_t*, Py_ssize_t*)'

[TheOncomingStorm]

I've been trying to build gr-baz and I consistently get the same error time and time again.

Scanning dependencies of target baz_swig
[ 91%] Building CXX object swig/CMakeFiles/baz_swig.dir/baz_swigPYTHON_wrap.cxx.o
gr-baz/build/swig/baz_swigPYTHON_wrap.cxx:5754:90: error: cannot convert 'PySliceObject' to 'PyObject {aka object}' for argument '1' to 'int PySlice_GetIndices(PyObject_, Py_ssize_t, Py_ssize_t_, Py_ssize_t_, Py_ssize_t*)'

I did some checking and there were some suggestions that it's a Swig version conflict error but I've updated(and downgraded) my swig installation and I get the same results...but regardless the error reports were almost 4 years old and were for a much older version of swig.

Then I noticed that during the configure it'd detect python2 runtime but then detect python3 .so libraries so I tried forcing them to match libraries with the runtimes and still got the same results.

Any thoughts?

gcc 4.8.3
swig 3.0.2
gnuradio 3.7.5.1
python 2.7.8 and 3.4.2

[TheOncomingStorm]

Ok, I finally solved this and it DEFINITELY had everything to do with the mismatched python runtime and libraries.

The way I solved it was to patch swig/CMakeLists.txt
-find_package(PythonLibs)
+find_package(PythonLibs 2.7 REQUIRED)

There's gotta be a more elegant way of doing that from your end but it works as I need it to at this point so I'll leave that up to you.