[eval.py] fix logging initiation and silent make check

eval.py

@@ -875,9 +875,12 @@ if __name__ == '__main__':
 
     args = parser.parse_args()
 
-    numeric_loglevel = getattr(logging, args.log.upper(), None)
-    if not isinstance(numeric_loglevel, int):
-        raise ValueError(f'Invalid log level: {args.log}')
+    if args.log:
+        numeric_loglevel = getattr(logging, args.log.upper(), None)
+        if not isinstance(numeric_loglevel, int):
+            raise ValueError(f'Invalid log level: {args.log}')
+    else:
+        numeric_loglevel = logging.WARNING
     logging.basicConfig(level=numeric_loglevel)
     log = logging.getLogger(Path(__file__).name)
 
@@ -976,7 +979,7 @@ if __name__ == '__main__':
 
     print("Building the artifact ...")
     make_cmd = ['make']
-    if numeric_loglevel <= logging.DEBUG:
+    if numeric_loglevel > logging.DEBUG:
         make_cmd.append('-s')
     subprocess.run(make_cmd, check=True, cwd=ROOT_DIR)