more fixes

Author: SchrodingerZhu

.github/workflows/libc-overlay-tests.yml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-20.04
+          - os: ubuntu-24.04
             compiler:
               c_compiler: clang
               cpp_compiler: clang++