foo.cc: In function ‘int mian()’:
foo.cc:8:1: warning: no return statement in function returning non-void [-Wreturn-type]
    8 | }
      | ^
/nix/binutils-2.40/bin/ld: /nix/glibc-2.38-44/lib/crt1.o: in function `_start':
(.text+0x1b): undefined reference to `main'
collect2: error: ld returned 1 exit status