compile error when build megcc

hi
I get the latest source code, I build megcc source code as the user guide, the step as follows:
1. apt-get install cmake ninja-build
2./third_party/prepare.sh
3. cd megcc/compiler
4. mkdir build
5. cmake .. -G Ninja
6. ninja

the error log as below:
../tools/mgb-to-tinynn/mgb-to-tinynn.cpp:102:19: error: ‘kernel_exporter’ has not been declared
export_cv_opr(kernel_exporter, dump_info->cv_impl);
^~~~~~~~~~~~~~~
../tools/mgb-to-tinynn/mgb-to-tinynn.cpp:102:36: error: ‘dump_info’ has not been declared
export_cv_opr(kernel_exporter, dump_info->cv_impl);
^~~~~~~~~
../tools/mgb-to-tinynn/mgb-to-tinynn.cpp:102:45: error: expected ‘,’ or ‘...’ before ‘->’ token
export_cv_opr(kernel_exporter, dump_info->cv_impl);
^~
../tools/mgb-to-tinynn/mgb-to-tinynn.cpp:102:54: error: ISO C++ forbids declaration of ‘export_cv_opr’ with no type [-fpermissive]
export_cv_opr(kernel_exporter, dump_info->cv_impl);

Reproduce the build from the listed apt-get, third_party/prepare.sh, CMake, and Ninja steps, then inspect compiler/tools/mgb-to-tinynn/mgb-to-tinynn.cpp around line 102. Compare the reported declarations and macro invocation with the surrounding source; done means the MegCC Ninja build completes without these compilation errors.

Written by the indexing model from the issue text.