[Clang] Correctly forward --cuda-path to the nvlink wrapper

Summary:
This was not forwarded properly as it would try to pass it to `nvlink`.

Fixes #100168

Author: jhuber6

clang/lib/Driver/ToolChains/Cuda.cpp

@@ -609,6 +609,10 @@ void NVPTX::Linker::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back(Args.MakeArgString(
         "--pxtas-path=" + Args.getLastArgValue(options::OPT_ptxas_path_EQ)));
 
+  if (Args.hasArg(options::OPT_cuda_path_EQ))
+    CmdArgs.push_back(Args.MakeArgString(
+        "--cuda-path=" + Args.getLastArgValue(options::OPT_cuda_path_EQ)));
+
   // Add paths specified in LIBRARY_PATH environment variable as -L options.
   addDirectoryList(Args, CmdArgs, "-L", "LIBRARY_PATH");
 

clang/test/Driver/nvlink-wrapper.c

@@ -63,3 +63,10 @@ int baz() { return y + x; }
 // RUN:   -arch sm_52 -o a.out 2>&1 | FileCheck %s --check-prefix=LTO
 // LTO: ptxas{{.*}} -m64 -c [[PTX:.+]].s -O3 -arch sm_52 -o [[CUBIN:.+]].cubin
 // LTO: nvlink{{.*}} -arch sm_52 -o a.out [[CUBIN]].cubin {{.*}}-u-{{.*}}.cubin {{.*}}-y-{{.*}}.cubin
+
+//
+// Check that we don't forward some arguments.
+//
+// RUN: clang-nvlink-wrapper --dry-run %t.o %t-u.o %t-y.a \
+// RUN:   -arch sm_52 --cuda-path/opt/cuda -o a.out 2>&1 | FileCheck %s --check-prefix=PATH
+// PATH-NOT: --cuda-path=/opt/cuda

clang/tools/clang-nvlink-wrapper/NVLinkOpts.td

@@ -12,9 +12,9 @@ def verbose : Flag<["-"], "v">, HelpText<"Print verbose information">;
 def version : Flag<["--"], "version">,
   HelpText<"Display the version number and exit">;
 
-def cuda_path_EQ : Joined<["--"], "cuda-path=">,
+def cuda_path_EQ : Joined<["--"], "cuda-path=">, Flags<[WrapperOnlyOption]>,
   MetaVarName<"<dir>">, HelpText<"Set the system CUDA path">;
-def ptxas_path_EQ : Joined<["--"], "ptxas-path=">,
+def ptxas_path_EQ : Joined<["--"], "ptxas-path=">, Flags<[WrapperOnlyOption]>,
   MetaVarName<"<dir>">, HelpText<"Set the 'ptxas' path">;
 
 def o : JoinedOrSeparate<["-"], "o">, MetaVarName<"<path>">,