+ modify -fvisibility check to work with g++
> fixes for building with Visual Studio C++ and msys2 (patches by
"Maarten Anonymous"):
+ add configure option and check for gcc -fvisibility=hidden feature
+ define NCURSES_NOMACROS in lib_gen.c to work around Visual Studio
C++ preprocessor limitations.
+ modify some of the configure-macros, as well as mk-1st.awk to work
with Visual Studio C++ default filenaming.