[Bug] command:"scons --target=cmake -s " makes error in Ubuntu 24.04.1 LTS x86_64

RT-Thread Version

master

Hardware Type/Architectures

at32f403a-start

Develop Toolchain

GCC

Describe the bug

1. scons --target=cmake -s after got a

entire program
2. $ scons --target=cmake -s Newlib version: 4.4.0 Update setting files for CMakeLists.txt... AttributeError: 'CLVar' object has no attribute 'replace': File "/home/starry/mcu/at32f403a_example/SConstruct", line 65: DoBuilding(TARGET, objs) File "/home/starry/mcu/at32f403a_example/rt-thread/tools/building.py", line 874: EndBuilding(target, program) File "/home/starry/mcu/at32f403a_example/rt-thread/tools/building.py", line 983: GenTargetProject(program) File "/home/starry/mcu/at32f403a_example/rt-thread/tools/building.py", line 947: CMakeProject(Env, Projects, GetOption('project-name')) File "/home/starry/mcu/at32f403a_example/rt-thread/tools/cmake.py", line 343: GenerateCFiles(env, project, project_name) File "/home/starry/mcu/at32f403a_example/rt-thread/tools/cmake.py", line 67: CXXFLAGS = env['CXXFLAGS'].replace('\\', "/").replace('\"', "\\\"")
3.

4. it works after make it

Other additional context

No response

Reproduce scons --target=cmake -s on the reported Ubuntu setup, then inspect rt-thread/tools/cmake.py at line 67 and the callers in tools/building.py. Confirm the expected CXXFLAGS value and verify that CMake project generation completes without the reported AttributeError.