Homebrew Question failed to compile libnx for layoff

[A3660537JPN]

I wanted to compile a modified libnx(https://github.com/crc-32/libnx/tree/layoff) so that I could compile layoff.(https://github.com/crc-32/layoff)
But I got an error
"/home/a/Downloads/libnx-2.0.0/nx/source/runtime/newlib.c:174:5: error: '__syscalls' undeclared (first use in this function); did you mean '__syscall_exit'?
__syscalls.exit = __libnx_exit;
^~~~~~~~~~
__syscall_exit"
How can I fix this?
Or would anyone give me a compiled layoff?