File python36-buildfix1.patch of Package Mesa

Index: mesa-25.1.0/src/nouveau/headers/class_parser.py
===================================================================
--- mesa-25.1.0.orig/src/nouveau/headers/class_parser.py
+++ mesa-25.1.0/src/nouveau/headers/class_parser.py
@@ -11,6 +11,16 @@ import subprocess
 
 from mako.template import Template
 
+def removeprefix(s, prefix):
+    if s.startswith(prefix):
+        return s[len(prefix):]
+    return s
+
+def removesuffix(s, suffix):
+    if s.endswith(suffix):
+        return s[:-len(suffix)]
+    return s
+
 METHOD_ARRAY_SIZES = {
     'BIND_GROUP_CONSTANT_BUFFER'                            : 16,
     'CALL_MME_DATA'                                         : 256,
@@ -467,7 +477,7 @@ def parse_header(nvcl, f):
                 if ":" in list[2]:
                     state = 1
                 elif teststr in list[1]:
-                    curfield.defs[list[1].removeprefix(teststr)] = list[2]
+                    curfield.defs[removeprefix(list[1],teststr)] = list[2]
                 else:
                     state = 1
 
@@ -477,7 +487,7 @@ def parse_header(nvcl, f):
                     if ("0x" in list[2]):
                         state = 1
                     else:
-                        field = list[1].removeprefix(teststr)
+                        field = removeprefix(list[1], teststr)
                         bitfield = list[2].split(":")
                         f = Field(field, bitfield[1], bitfield[0])
                         curmthd.fields.append(f)
@@ -497,13 +507,13 @@ def parse_header(nvcl, f):
                 is_array = 0
                 if (':' in list[2]):
                     continue
-                name = list[1].removeprefix(teststr)
+                name = removeprefix(list[1], teststr)
                 if name.endswith("(i)"):
                     is_array = 1
-                    name = name.removesuffix("(i)")
+                    name = removesuffix(name, "(i)")
                 if name.endswith("(j)"):
                     is_array = 1
-                    name = name.removesuffix("(j)")
+                    name = removesuffix(name, "(j)")
 
                 curmthd = Method(name, list[2], is_array)
                 methods[name] = curmthd
@@ -512,8 +522,8 @@ def parse_header(nvcl, f):
     return (version, methods)
 
 def nvcl_for_filename(name):
-    name = name.removeprefix("cl")
-    name = name.removesuffix(".h")
+    name = removeprefix(name, "cl")
+    name = removesuffix(name, ".h")
     return "NV" + name.upper()
 
 def main():
@@ -542,7 +552,7 @@ def main():
     if args.prev_in_h is not None:
         prev_clheader = os.path.basename(args.prev_in_h)
         prev_nvcl = nvcl_for_filename(prev_clheader)
-        prev_mod = prev_clheader.removesuffix(".h")
+        prev_mod = removesuffix(prev_clheader, ".h")
         with open(args.prev_in_h, 'r', encoding='utf-8') as f:
             (prev_version, prev_methods) = parse_header(prev_nvcl, f)