C23 changes how function definitions like int `int tputs ()` are
interpreted. In older standards this meant that the function arguments
are unknown. In C23 this is interpreted as `int tputs (void)` so now
when we compile with GCC15 (which defaults to -std=gnu23) we get an
error such as

  readline/display.c:2839:17: error: too many arguments to function 'tputs'; 
expected 0, have 3

Add the function arguments for tgetent(), tgetflag(), tgetnum(),
tgetstr(), tputs() and tgoto().

Signed-off-by: Chris Packham <judge.pack...@gmail.com>
---
 readline/readline/tcap.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/readline/readline/tcap.h b/readline/readline/tcap.h
index 859e6eed5aa..9e2ed124e49 100644
--- a/readline/readline/tcap.h
+++ b/readline/readline/tcap.h
@@ -46,14 +46,14 @@ extern char *UP, *BC;
 
 extern short ospeed;
 
-extern int tgetent ();
-extern int tgetflag ();
-extern int tgetnum ();
-extern char *tgetstr ();
+extern int tgetent (char *bp, const char *name);
+extern int tgetflag (char *id);
+extern int tgetnum (char *id);
+extern char *tgetstr (char *id, char **area);
 
-extern int tputs ();
+extern int tputs (const char *str, int affcnt, int (*putc)(int));
 
-extern char *tgoto ();
+extern char *tgoto (const char *cap, int col, int row);
 
 #endif /* HAVE_TERMCAP_H */
 
-- 
2.49.0


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