Build issue with MatX concerning initialisation of shared variables

I'm attempting to build and install MatX onto my Linux machine.

I'm following the instructions found here.

Except when I run the make -j command, I get the following trace:

/home/<me>/Documents/MatX/include/matx/kernels/channelize_poly.cuh(349): error: initializer not allowed for __shared__ variable /home/<me>/Documents/MatX/include/matx/kernels/channelize_poly.cuh(349): error: initializer not allowed for __shared__ variable /home/<me>/Documents/MatX/include/matx/kernels/channelize_poly.cuh(349): error: initializer not allowed for __shared__ variable /home/<me>/Documents/MatX/include/matx/kernels/channelize_poly.cuh(349): error: initializer not allowed for __shared__ variable /home/<me>/Documents/MatX/include/matx/kernels/channelize_poly.cuh(349): error: initializer not allowed for __shared__ variable /home/<me>/Documents/MatX/include/matx/kernels/channelize_poly.cuh(64): error: initializer not allowed for __shared__ variable 

Which is rather odd, since if you look at the offending lines in channelize_poly.cuh (see the source here), you see:

    // Lines 63 & 64    const int SMEM_MAX_FILTER_TAPS = 128;    __shared__ filter_t smem_filter[SMEM_MAX_FILTER_TAPS];   // Lines 348 & 349   // Pre-compute the DFT complex exponentials and store in shared memory    __shared__ output_t smem_eij[NUM_CHAN][NUM_CHAN];

I.e. there is no supposed initialization of the shared variables.

The software I'm using:

• CUDA 11.6
• G++ 9.4.0
• Ubuntu 20.04