Hardcode windows

As detailed in https://github.com/DeXtmL/bitsandbytes-win-prebuilt
as well as oobabooga/text-generation-webui#147 (comment)

bitsandbytes/cuda_setup/main.py

@@ -119,10 +119,10 @@ def run_cuda_setup(self):
                     self.generate_instructions()
                     self.print_log_stack()
                     raise Exception('CUDA SETUP: Setup Failed!')
-                self.lib = ct.cdll.LoadLibrary(binary_path)
+                self.lib = ct.cdll.LoadLibrary(str(binary_path))
             else:
                 self.add_log_entry(f"CUDA SETUP: Loading binary {binary_path}...")
-                self.lib = ct.cdll.LoadLibrary(binary_path)
+                self.lib = ct.cdll.LoadLibrary(str(binary_path))
         except Exception as ex:
             self.add_log_entry(str(ex))
             self.print_log_stack()
@@ -360,12 +360,16 @@ def get_compute_capability(cuda):
 
 
 def evaluate_cuda_setup():
+    binary_name = 'libbitsandbytes_cuda116.dll'
+    # cudart_path = 'C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v12.1\\bin'
+    # cuda_version_string = f'{12}{2}'
+    return binary_name, None, None, None, None
     if 'BITSANDBYTES_NOWELCOME' not in os.environ or str(os.environ['BITSANDBYTES_NOWELCOME']) == '0':
         print('')
         print('='*35 + 'BUG REPORT' + '='*35)
         print('Welcome to bitsandbytes. For bug reports, please submit your error trace to: https://github.com/TimDettmers/bitsandbytes/issues')
         print('='*80)
-    if not torch.cuda.is_available(): return 'libsbitsandbytes_cpu.so', None, None, None, None
+    if torch.cuda.is_available(): return 'libbitsandbytes_cuda116.dll', None, None, None, None
 
     cuda_setup = CUDASetup.get_instance()
     cudart_path = determine_cuda_runtime_lib_path()

setup.py

@@ -7,7 +7,7 @@
 
 from setuptools import find_packages, setup
 
-libs = list(glob.glob("./bitsandbytes/libbitsandbytes*.so"))
+libs = list(glob.glob("./bitsandbytes/libbitsandbytes*.dll"))
 libs = [os.path.basename(p) for p in libs]
 print("libs:", libs)