Symbol: enter_vertical_hl_mode
lib/libcurses/attributes.c
356
if (enter_vertical_hl_mode != NULL)
lib/libcurses/refresh.c
1006
if (on & WA_VERTICAL && enter_vertical_hl_mode != NULL)
lib/libcurses/refresh.c
1008
tputs(enter_vertical_hl_mode, 0, __cputchar);