https://github.com/andmarti1424/sc-im/pull/972
https://bugs.gentoo.org/962947

From d172a436ced0839ad7ea4f3549f952216e050fb6 Mon Sep 17 00:00:00 2001
From: cntrmx <strwlf@proton.me>
Date: Wed, 17 Sep 2025 22:36:08 -0500
Subject: [PATCH] Fix LTO mismatch: match sig_winchg() declaration with
 definition

When building with LTO, GCC ( 15.2.0 ) reports a type mismatch
between the declaration in 'color.c' and definition in 'tui.c'.
This patch updates the declaration to take an 'int' parameter
and passes a dummy value to avoid build failure.
---
 color.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/color.c b/src/color.c
index 4f368a09..654d9fb1 100644
--- a/color.c
+++ b/color.c
@@ -586,7 +586,7 @@ int same_ucolor(struct ucolor * u, struct ucolor * v) {
 int redefine_color(char * color, int r, int g, int b) {
     struct roman * roman = session->cur_doc;
     #if defined(NCURSES) && defined(USECOLORS)
-    extern void sig_winchg();
+    extern void sig_winchg(int signum);
     if (
         ! get_conf_int("nocurses")
         && has_colors() && can_change_color()
@@ -601,7 +601,7 @@ int redefine_color(char * color, int r, int g, int b) {
 #else
            if (init_color(atoi(s), RGB(r, g, b)) == 0) {
 #endif
-               sig_winchg();
+               sig_winchg(0);
                if (! roman->loading) sc_info("Color %s redefined to %d %d %d.", color, r, g, b);
                return 0;
            }