the makefile is out of date

[zzsczz]

I build the cpp11 in two envirements but faild

1 I installed mingw-w64( target win32 posix thread and dwarf ) in windows . There is not header file "termios.h" .

2 I installed freebsd 12.0 in virtualbox . The llvm and clang are installed.
I type make and get error:

clang -o avr11 clang: error: no input files *** Error code 1