Fix build errors on MSYS platform

[carlzhc]

# make sure the required packages are already installed
$ pacman -Q | egrep '^(libbsd|ncurses|cmake)'
cmake 3.26.2-1
libbsd 0.11.7-1
ncurses 6.4-1
ncurses-devel 6.4-1

$ cd build && cmake .. && make VERBOSE=1

... ... (see the attached log file) build.1712669255.log