Merge pull request #1 from isVoid/numba-cuda-runtime

Determine conda include path based on machine kind

Author: brandon-b-miller

numba_cuda/numba/cuda/cuda_paths.py

@@ -2,6 +2,7 @@
 import re
 import os
 from collections import namedtuple
+import platform
 
 from numba.core.config import IS_WIN32
 from numba.misc.findlib import find_lib, find_file
@@ -259,14 +260,41 @@ def get_debian_pkg_libdevice():
     return pkg_libdevice_location
 
 
+def get_current_cuda_target_name():
+    """Determine conda's CTK target folder based on system and machine arch.
+    
+    CTK's conda package delivers headers based on its architecture type. For example,
+    `x86_64` machine places header under `$CONDA_PREFIX/targets/x86_64-linux`, and
+    `aarch64` places under `$CONDA_PREFIX/targets/sbsa-linux`. Read more about the
+    nuances at cudart's conda feedstock:
+    https://github.com/conda-forge/cuda-cudart-feedstock/blob/main/recipe/meta.yaml#L8-L11  # noqa: E501
+    """
+    system = platform.system()
+    machine = platform.machine()
+
+    if system == "Linux":
+        arch_to_targets = {
+            'x86_64': 'x86_64-linux',
+            'aarch64': 'sbsa-linux'
+        }
+        return arch_to_targets.get(machine)
+    
+    return None
+
 def get_conda_include_dir():
     """
     Return the include directory in the current conda environment, if one
     is active and it exists.
     """
     conda_prefix = os.environ.get('CONDA_PREFIX')
+    target_name = get_current_cuda_target_name()
+
     if conda_prefix:
-        include_dir = os.path.join(conda_prefix, 'include')
+        if target_name:
+            include_dir = os.path.join(conda_prefix, f'targets/{target_name}/include')
+        else:
+            # A fallback when target cannot determined, though usually it shouldn't.
+            include_dir = os.path.join(conda_prefix, f'include')
         if os.path.exists(include_dir):
             return include_dir
     return None

numba_cuda/numba/cuda/cudadrv/nvrtc.py

@@ -3,7 +3,7 @@
 from numba.core import config
 from numba.cuda.cudadrv.error import (NvrtcError, NvrtcCompilationError,
                                       NvrtcSupportError)
-from numba.cuda.cuda_paths import _get_include_dir
+from numba.cuda.cuda_paths import get_cuda_paths
 import functools
 import os
 import threading
@@ -233,12 +233,13 @@ def compile(src, name, cc):
     #   being optimized away.
     major, minor = cc
     arch = f'--gpu-architecture=compute_{major}{minor}'
-    include = f'-I{config.CUDA_INCLUDE_PATH}'
+
+    cuda_include = f"-I{get_cuda_paths()['include_dir'].info}"
 
     cudadrv_path = os.path.dirname(os.path.abspath(__file__))
     numba_cuda_path = os.path.dirname(cudadrv_path)
-    numba_include = f'-I{numba_cuda_path} -I{_get_include_dir()}'
-    options = [arch, include, numba_include, '-rdc', 'true']
+    numba_include = f'-I{numba_cuda_path}'
+    options = [arch, cuda_include, numba_include, '-rdc', 'true']
 
     # Compile the program
     compile_error = nvrtc.compile_program(program, options)