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nixpkgs/pkgs/development/python-modules/dlib/default.nix
Maximilian Bosch 9732c44225
dlib: add flag to disable AVX support
Especially older hardware doesn't support AVX instructions. DLib is
still functional there, but significantly slower[1].

By setting `avxInstructions` to false, DLib will be compiled without
this feature.

[1] http://dlib.net/compile.html
2019-03-03 15:35:58 +01:00

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{ buildPythonPackage, dlib, python, pytest, avxSupport ? true }:
buildPythonPackage {
inherit (dlib) name src nativeBuildInputs buildInputs meta;
# although AVX can be enabled, we never test with it. Some Hydra machines
# fail because of this, however their build results are probably used on hardware
# with AVX support.
checkPhase = ''
${python.interpreter} nix_run_setup test --no USE_AVX_INSTRUCTIONS
'';
setupPyBuildFlags = [ "--${if avxSupport then "yes" else "no"} USE_AVX_INSTRUCTIONS" ];
patches = [ ./build-cores.patch ];
checkInputs = [ pytest ];
}