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ecmwf / atlas

A library for numerical weather prediction and climate modelling
https://sites.ecmwf.int/docs/atlas
Apache License 2.0
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Failed to find nvcc. #189

Closed DJDavies2 closed 6 months ago

DJDavies2 commented 6 months ago

What happened?

Trying to build atlas is giving this failure in the cmake step:

CMake Error at /spice/data/users/darth/opt/mobbs-52/util/spice_gnu/share/cmake-3.26/Modules/CMakeDetermineCUDACompiler.cmake:180 (message): Failed to find nvcc.

Compiler requires the CUDA toolkit. Please set the CUDAToolkit_ROOT variable. Call Stack (most recent call first): atlas/cmake/features/CUDA.cmake:9 (enable_language) atlas/CMakeLists.txt:70 (include)

What are the steps to reproduce the bug?

As far as I can tell this occurs on any config. These cmake commands worked a few days ago.

Version

develop

Platform (OS and architecture)

Linux

Relevant log output

No response

Accompanying data

No response

Organisation

Met Office

wdeconinck commented 6 months ago

Hi @DJDavies2 this is a new feature but by default it is OFF, and therefore should not be enabled. We also encountered this same problem ourselves, when atlas is part of a bundle together with eckit. eckit (current release 1.26.2) comes in a bundle before atlas, and has the CUDA feature with "DEFAULT ON". That then initialises "ENABLE_CUDA ON" and makes atlas configuration fail. The workaround is either to explicitly set "-DENABLE_CUDA=OFF" on the configuration line, or update eckit its develop branch where I made a commit last week to turn the DEFAULT OFF: https://github.com/ecmwf/eckit/commit/f45d23935755b12aeff42f2183a214835a80cb31 .

DJDavies2 commented 6 months ago

Okay, thanks. Using eckit develop works.