[NVCC] Bugfix nvcc command tool that relies on the compile time env

python/tvm/contrib/nvcc.py

@@ -89,10 +89,13 @@ def compile_cuda(code, target="ptx", arch=None, options=None, path_target=None):
     cmd += ["-o", file_target]
     cmd += [temp_code]
 
-    cxx_compiler_path = tvm.support.libinfo().get("TVM_CXX_COMPILER_PATH")
+    # TODO(tvm-team): consider add cxx compiler path detection for windows
+    # Tell nvcc where to find the c++ compiler just in case it is not in the path.
+    # On Windows it is not in the path by default.
+    # NOTE: we canont use TVM_CXX_COMPILER_PATH because the runtime env can be different
+    # from the compilation env.
+    cxx_compiler_path = ""
     if cxx_compiler_path != "":
-        # This tells nvcc where to find the c++ compiler just in case it is not in the path.
-        # On Windows it is not in the path by default.
         cmd += ["-ccbin", cxx_compiler_path]
 
     proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)