dependencies/cuda: Add support for disabling the cuda runtime

Author: dcbaker

docs/markdown/Dependencies.md

@@ -388,6 +388,11 @@ additional toolkit libraries that need to be explicitly linked to. If the
 CUDA Toolkit cannot be found in the default paths on your system, you can
 set the path using `CUDA_PATH` explicitly.
 
+A special set of modules called `cudart`, `cudart_static` and `cudart_none` can
+be used to control the Cuda Runtime used. If none of these are passed
+`cudart_static` is automatically added unless the `static` keyword argument is
+set to `false`, then `cudart` is chosen.
+
 ## CUPS
 
 `method` may be `auto`, `config-tool`, `pkg-config`, `cmake` or `extraframework`.

docs/markdown/snippets/cuda_dep_no_runtime.md

@@ -0,0 +1,4 @@
+## Cuda dependency with cudart_none
+
+The Cuda dependency can no be initialize as `dependency('cuda', modules : ['cudart_none'])`,
+which will result in no runtime. This is equivalent to `--cudart none` on the command line.

mesonbuild/dependencies/cuda.py

@@ -14,6 +14,7 @@
 from .base import DependencyException, SystemDependency
 from .detect import packages
 from ..mesonlib import LibType
+from ..interpreterbase import FeatureNew
 
 if T.TYPE_CHECKING:
     from ..environment import Environment
@@ -39,7 +40,10 @@ def __init__(self, environment: 'Environment', kwargs: T.Dict[str, T.Any]) -> No
         super().__init__('cuda', environment, kwargs, language=language)
         self.lib_modules: T.Dict[str, T.List[str]] = {}
         self.requested_modules = self.get_requested(kwargs)
-        if not any(runtime in self.requested_modules for runtime in ['cudart', 'cudart_static']):
+        if 'cudart_none' in self.requested_modules:
+            self.featurechecks.append(FeatureNew('Cuda module cudart_none', '1.10'))
+
+        if not any(runtime in self.requested_modules for runtime in ['cudart', 'cudart_static', 'cudart_none']):
             # By default, we prefer to link the static CUDA runtime, since this is what nvcc also does by default:
             # https://docs.nvidia.com/cuda/cuda-compiler-driver-nvcc/index.html#cudart-none-shared-static-cudart
             req_modules = ['cudart']
@@ -322,6 +326,7 @@ def get_link_args(self, language: T.Optional[str] = None, raw: bool = False) ->
         REWRITE_MODULES = {
             'cudart': ['-cudart', 'shared'],
             'cudart_static': ['-cudart', 'static'],
+            'cudart_none': ['-cudart', 'none'],
             'cudadevrt': ['-cudadevrt'],
         }