cudaPackages.setupCudaHook: propagate buildInputs and self
This is useful for the cuda variants of packages like opencv and pytorch, whose xxxxConfig.cmake files do find_package(CUDAToolkit REQUIRED) regardless of whether they actually use it. With the propagated hook, we no longer have to manually add cuda dependencies into torch/opencvs reverse dependencies cudaPackages.cuda_nvcc: fix setupCudaHook propagation
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Someone Serge
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@ -47,35 +47,21 @@ final: prev: let
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./hooks/mark-for-cudatoolkit-root-hook.sh)
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{ });
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# Normally propagated by cuda_nvcc or cudatoolkit through their depsHostHostPropagated
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# Currently propagated by cuda_nvcc or cudatoolkit, rather than used directly
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setupCudaHook = (final.callPackage
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({ makeSetupHook, backendStdenv }:
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makeSetupHook
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{
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name = "setup-cuda-hook";
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substitutions.setupCudaHook = placeholder "out";
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# Point NVCC at a compatible compiler
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substitutions.ccRoot = "${backendStdenv.cc}";
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# Required in addition to ccRoot as otherwise bin/gcc is looked up
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# when building CMakeCUDACompilerId.cu
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substitutions.ccFullPath = "${backendStdenv.cc}/bin/${backendStdenv.cc.targetPrefix}c++";
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# Required by cmake's enable_language(CUDA) to build a test program
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# When implementing cross-compilation support: this is
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# final.pkgs.targetPackages.cudaPackages.cuda_cudart
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# Given the multiple-outputs each CUDA redist has, we can specify the exact components we
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# need from the package. CMake requires:
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# - the cuda_runtime.h header, which is in the dev output
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# - the dynamic library, which is in the lib output
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# - the static library, which is in the static output
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substitutions.cudartFlags = let cudart = final.cuda_cudart; in
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builtins.concatStringsSep " " (final.lib.optionals (final ? cuda_cudart) ([
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"-I${final.lib.getDev cudart}/include"
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"-L${final.lib.getLib cudart}/lib"
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] ++ final.lib.optionals (builtins.elem "static" cudart.outputs) [
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"-L${cudart.static}/lib"
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]));
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}
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./hooks/setup-cuda-hook.sh)
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{ });
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@ -1,8 +1,14 @@
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# shellcheck shell=bash
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# Should we mimick cc-wrapper's "hygiene"?
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[[ -z ${strictDeps-} ]] || (( "$hostOffset" < 0 )) || return 0
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echo "Sourcing mark-for-cudatoolkit-root-hook" >&2
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markForCUDAToolkit_ROOT() {
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mkdir -p "${prefix}/nix-support"
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touch "${prefix}/nix-support/include-in-cudatoolkit-root"
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[[ -f "${prefix}/nix-support/include-in-cudatoolkit-root" ]] && return
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echo "$pname-$output" > "${prefix}/nix-support/include-in-cudatoolkit-root"
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}
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fixupOutputHooks+=(markForCUDAToolkit_ROOT)
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@ -1,5 +0,0 @@
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# shellcheck shell=bash
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# CMake's enable_language(CUDA) runs a compiler test and it doesn't account for
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# CUDAToolkit_ROOT. We have to help it locate libcudart
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export NVCC_APPEND_FLAGS+=" -L@cudartLib@/lib -L@cudartStatic@/lib -I@cudartInclude@/include"
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@ -3,19 +3,57 @@
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# Only run the hook from nativeBuildInputs
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(( "$hostOffset" == -1 && "$targetOffset" == 0)) || return 0
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echo Sourcing setup-cuda-hook >&2
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guard=Sourcing
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reason=
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extendCUDAToolkit_ROOT() {
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if [[ -f "$1/nix-support/include-in-cudatoolkit-root" ]] ; then
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addToSearchPathWithCustomDelimiter ";" CUDAToolkit_ROOT "$1"
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[[ -n ${cudaSetupHookOnce-} ]] && guard=Skipping && reason=" because the hook has been propagated more than once"
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if [[ -d "$1/include" ]] ; then
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addToSearchPathWithCustomDelimiter ";" CUDAToolkit_INCLUDE_DIR "$1/include"
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fi
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fi
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if (( "${NIX_DEBUG:-0}" >= 1 )) ; then
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echo "$guard hostOffset=$hostOffset targetOffset=$targetOffset setupCudaHook$reason" >&2
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else
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echo "$guard setup-cuda-hook$reason" >&2
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fi
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[[ "$guard" = Sourcing ]] || return 0
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declare -g cudaSetupHookOnce=1
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declare -Ag cudaHostPathsSeen=()
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declare -Ag cudaOutputToPath=()
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extendcudaHostPathsSeen() {
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(( "${NIX_DEBUG:-0}" >= 1 )) && echo "extendcudaHostPathsSeen $1" >&2
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local markerPath="$1/nix-support/include-in-cudatoolkit-root"
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[[ ! -f "${markerPath}" ]] && return
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[[ -v cudaHostPathsSeen[$1] ]] && return
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cudaHostPathsSeen["$1"]=1
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# E.g. cuda_cudart-lib
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local cudaOutputName
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read -r cudaOutputName < "$markerPath"
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[[ -z "$cudaOutputName" ]] && return
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local oldPath="${cudaOutputToPath[$cudaOutputName]-}"
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[[ -n "$oldPath" ]] && echo "extendcudaHostPathsSeen: warning: overwriting $cudaOutputName from $oldPath to $1" >&2
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cudaOutputToPath["$cudaOutputName"]="$1"
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}
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addEnvHooks "$targetOffset" extendcudaHostPathsSeen
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addEnvHooks "$targetOffset" extendCUDAToolkit_ROOT
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setupCUDAToolkit_ROOT() {
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(( "${NIX_DEBUG:-0}" >= 1 )) && echo "setupCUDAToolkit_ROOT: cudaHostPathsSeen=${!cudaHostPathsSeen[*]}" >&2
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for path in "${!cudaHostPathsSeen[@]}" ; do
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addToSearchPathWithCustomDelimiter ";" CUDAToolkit_ROOT "$path"
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if [[ -d "$path/include" ]] ; then
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addToSearchPathWithCustomDelimiter ";" CUDAToolkit_INCLUDE_DIR "$path/include"
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fi
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done
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export cmakeFlags+=" -DCUDAToolkit_INCLUDE_DIR=$CUDAToolkit_INCLUDE_DIR -DCUDAToolkit_ROOT=$CUDAToolkit_ROOT"
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}
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preConfigureHooks+=(setupCUDAToolkit_ROOT)
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setupCUDAToolkitCompilers() {
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echo Executing setupCUDAToolkitCompilers >&2
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@ -58,15 +96,44 @@ setupCUDAToolkitCompilers() {
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# CMake's enable_language(CUDA) runs a compiler test and it doesn't account for
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# CUDAToolkit_ROOT. We have to help it locate libcudart
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local cudartFlags="@cudartFlags@"
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if [[ -z "${nvccDontPrependCudartFlags-}" ]] && [[ -n "${cudartFlags:-}" ]] ; then
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export NVCC_APPEND_FLAGS+=" $cudartFlags"
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if [[ -z "${nvccDontPrependCudartFlags-}" ]] ; then
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if [[ ! -v cudaOutputToPath["cuda_cudart-out"] ]] ; then
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echo "setupCUDAToolkitCompilers: missing cudaPackages.cuda_cudart. This may become an an error in the future" >&2
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# exit 1
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fi
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for pkg in "${!cudaOutputToPath[@]}" ; do
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[[ ! "$pkg" = cuda_cudart* ]] && continue
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local path="${cudaOutputToPath[$pkg]}"
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if [[ -d "$path/include" ]] ; then
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export NVCC_PREPEND_FLAGS+=" -I$path/include"
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fi
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if [[ -d "$path/lib" ]] ; then
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export NVCC_PREPEND_FLAGS+=" -L$path/lib"
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fi
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done
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fi
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}
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preConfigureHooks+=(setupCUDAToolkitCompilers)
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setupCMakeCUDAToolkit_ROOT() {
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export cmakeFlags+=" -DCUDAToolkit_INCLUDE_DIR=$CUDAToolkit_INCLUDE_DIR -DCUDAToolkit_ROOT=$CUDAToolkit_ROOT"
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propagateCudaLibraries() {
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(( "${NIX_DEBUG:-0}" >= 1 )) && echo "propagateCudaLibraries: cudaPropagateToOutput=$cudaPropagateToOutput cudaHostPathsSeen=${!cudaHostPathsSeen[*]}" >&2
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[[ -z "${cudaPropagateToOutput-}" ]] && return
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mkdir -p "${!cudaPropagateToOutput}/nix-support"
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# One'd expect this should be propagated-bulid-build-deps, but that doesn't seem to work
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echo "@setupCudaHook@" >> "${!cudaPropagateToOutput}/nix-support/propagated-native-build-inputs"
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local propagatedBuildInputs=( "${!cudaHostPathsSeen[@]}" )
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for output in $(getAllOutputNames) ; do
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if [[ ! "$output" = "$cudaPropagateToOutput" ]] ; then
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propagatedBuildInputs+=( "${!output}" )
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fi
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break
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done
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# One'd expect this should be propagated-host-host-deps, but that doesn't seem to work
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printWords "${propagatedBuildInputs[@]}" >> "${!cudaPropagateToOutput}/nix-support/propagated-build-inputs"
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}
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postHooks+=(setupCUDAToolkitCompilers)
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preConfigureHooks+=(setupCMakeCUDAToolkit_ROOT)
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postFixupHooks+=(propagateCudaLibraries)
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