Fix gencode flags in setup (#145)

* Fix gencode flags based on cuda version
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* review suggestions
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* revert append_nvcc_threads change
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

---------
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

setup.py

@@ -30,22 +30,22 @@ def get_cuda_bare_metal_version(cuda_dir):
     release = output[release_idx].split(".")
     bare_metal_major = release[0]
     bare_metal_minor = release[1][0]
-    return raw_output, bare_metal_major, bare_metal_minor
+    return (int(bare_metal_major), int(bare_metal_minor))
 
 
 def append_nvcc_threads(nvcc_extra_args):
-    _, bare_metal_major, bare_metal_minor = get_cuda_bare_metal_version(CUDA_HOME)
-    if int(bare_metal_major) >= 11 and int(bare_metal_minor) >= 2:
+    cuda_major, cuda_minor = get_cuda_bare_metal_version(CUDA_HOME)
+    if cuda_major >= 11 and cuda_minor >= 2:
         return nvcc_extra_args + ["--threads", "4"]
     return nvcc_extra_args
 
 
 def extra_gencodes(cc_flag):
-    _, bare_metal_major, bare_metal_minor = get_cuda_bare_metal_version(CUDA_HOME)
-    if int(bare_metal_major) >= 11:
+    cuda_bare_metal_version = get_cuda_bare_metal_version(CUDA_HOME)
+    if cuda_bare_metal_version >= (11, 0):
         cc_flag.append("-gencode")
         cc_flag.append("arch=compute_80,code=sm_80")
-        if int(bare_metal_minor) >= 8:
+    if cuda_bare_metal_version >= (11, 8):
         cc_flag.append("-gencode")
         cc_flag.append("arch=compute_90,code=sm_90")