Error while building Dockerfile: "Unsupported gpu architecture"

[RobertoRoos]

While trying to build the Dockerfile (or actually an extended Dockerfile based on this) I get the following error during the building of OpenPose:

nvcc fatal   : Unsupported gpu architecture 'compute_80'

Running Docker on Ubuntu 20.04, with a Titan Xp GPU.

Oddly enough I can compile OpenPose while running the container, but not when done during the building of the Dockerfile.

Not really your problem, but I wanted to document somewhere.

[RobertoRoos]

I found I can fix this by setting the CUDA architecture explicitly while compiling during the Docker build:

cmake .. -DBUILD_PYTHON=ON -DCUDA_ARCH="Pascal"

...as My Titan Xp has the Pascal architecture.

Actually, because a bug in OpenPose this command doesn't work, so instead I run:

cmake .. -DBUILD_PYTHON=ON -DCUDA_ARCH=Manual -DCUDA_ARCH_BIN="60 61 62" -DCUDA_ARCH_PTX="61"

Maybe we can make a note of this in the readme?
And I'm confused why other builds don't fail too.