Add a CUDA linker object

Fixes issue #5870

mesonbuild/compilers/cuda.py

@@ -34,7 +34,7 @@ class CudaCompiler(Compiler):
         super().__init__(exelist, version, for_machine, **kwargs)
         self.is_cross = is_cross
         self.exe_wrapper = exe_wrapper
-        self.id = 'nvcc'
+        self.id = CudaCompiler.cuda_id()
         default_warn_args = []
         self.warn_args = {'0': [],
                           '1': default_warn_args,
@@ -42,6 +42,10 @@ class CudaCompiler(Compiler):
                           '3': default_warn_args + ['-Xcompiler=-Wextra',
                                                     '-Xcompiler=-Wpedantic']}
 
+    @staticmethod
+    def cuda_id():
+        return 'nvcc'
+
     def needs_static_linker(self):
         return False
 

mesonbuild/environment.py

@@ -55,6 +55,7 @@ from .linkers import (
     XildAppleDynamicLinker,
     XildLinuxDynamicLinker,
     XilinkDynamicLinker,
+    CudaLinker,
 )
 from functools import lru_cache
 from .compilers import (
@@ -696,6 +697,9 @@ class Environment:
             `-Xlinker=--version`) you must pass as a list.
         :extra_args: Any addtional arguments rquired (such as a source file)
         """
+        if CudaCompiler.cuda_id() in compiler:
+            return CudaLinker(compiler, for_machine, 'nvlink', prefix, version=CudaLinker.parse_version())
+
         extra_args = typing.cast(typing.List[str], extra_args or [])
         if isinstance(prefix, str):
             check_args = [prefix + '--version'] + extra_args

mesonbuild/linkers.py

@@ -909,3 +909,32 @@ class OptlinkDynamicLinker(VisualStudioLikeLinkerMixin, DynamicLinker):
 
     def get_allow_undefined_args(self) -> typing.List[str]:
         return []
+
+class CudaLinker(DynamicLinker):
+    """Cuda linker (nvlink)"""
+    @staticmethod
+    def parse_version():
+        version_cmd = ['nvlink', '--version']
+        try:
+            _, out, _ = mesonlib.Popen_safe(version_cmd)
+        except OSError:
+            return 'unknown version'
+        # Output example:
+        # nvlink: NVIDIA (R) Cuda linker
+        # Copyright (c) 2005-2018 NVIDIA Corporation
+        # Built on Sun_Sep_30_21:09:22_CDT_2018
+        # Cuda compilation tools, release 10.0, V10.0.166
+        # we need the most verbose version output. Luckily starting with V
+        return out.strip().split('V')[-1]
+
+    def get_output_args(self, outname: str) -> typing.List[str]:
+        return ['-o', outname]
+
+    def get_search_args(self, dirname: str) -> typing.List[str]:
+        return ['-L', dirname]
+
+    def fatal_warnings(self) -> typing.List[str]:
+        return ['--warning-as-error']
+
+    def get_allow_undefined_args(self) -> typing.List[str]:
+        return []