Support IBM i OS (#7920)

python-package/setup.py

@@ -44,6 +44,8 @@ def lib_name() -> str:
         name = 'libxgboost.dylib'
     elif system() == 'Windows':
         name = 'xgboost.dll'
+    elif system() == 'OS400':
+        name = 'libxgboost.so'
     return name
 
 

python-package/xgboost/libpath.py

@@ -49,6 +49,8 @@ def find_lib_path() -> List[str]:
         dll_path = [os.path.join(p, 'libxgboost.dylib') for p in dll_path]
     elif sys.platform == 'cygwin':
         dll_path = [os.path.join(p, 'cygxgboost.dll') for p in dll_path]
+    if platform.system() == 'OS400':
+        dll_path = [os.path.join(p, 'libxgboost.so') for p in dll_path]
 
     lib_path = [p for p in dll_path if os.path.exists(p) and os.path.isfile(p)]