From e0a37f988571fc470bf14608feff7d20ae239f65 Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: Thu, 23 Apr 2026 16:53:01 +0200
Subject: [PATCH] libpng: Avoid ICE with some GCC versions

There is a bug in GCC >= 15 that is triggered by compiling pngwrite.c
with -O3. Using -O2 instead works fine.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
 libpng/files/KOSMakefile.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libpng/files/KOSMakefile.mk b/libpng/files/KOSMakefile.mk
index c071315..2181847 100644
--- a/libpng/files/KOSMakefile.mk
+++ b/libpng/files/KOSMakefile.mk
@@ -14,6 +14,9 @@ KOS_CFLAGS += -I. \
 
 defaultall: pnglibconf.h fix-pngh $(OBJS) subdirs linklib
 
+# Avoid ICE with some GCC versions
+pngwrite.o: CFLAGS += -O2
+
 # Force the configuration file to be generated.
 pnglibconf.h: scripts/pnglibconf.h.prebuilt
 	cp $< $@