My guess about NCURSES_CONST was right; it expands to nothing in the
/usr/include/term.h on my old OSX system. There aren't any levers or
knobs available to avoid that so this adds casts of string literals
to avoid warnings about passing a literal to something that expects
non-const.
There's a lot of conditional code in termcap.c and the nhStr("foo")
(hidden cast) changes only got tested for my default configuraiton.
I tried to avoid typos but I attempt such all the time and we know
how that tends to go.
Are we sure that systems which need to install a curses development
package have term.h without that? A tty-only build shouldn't require
that.
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