boot/afboot-stm32: disable stack-protector

Disable stack-protector to avoid the following build failure:

/home/autobuild/autobuild/instance-14/output-1/host/bin/arm-buildroot-linux-gnueabi-ld -T stm32f429.lds --gc-sections -o stm32f469i-disco.elf stm32f469i-disco.o gpio.o mpu.o qspi.o start_kernel.o usart-f4.o
/home/autobuild/autobuild/instance-14/output-1/host/bin/arm-buildroot-linux-gnueabi-ld: stm32f469i-disco.o: in function `main':
stm32f469i-disco.c:(.text.startup.main+0x3b0): undefined reference to `__stack_chk_guard'
/home/autobuild/autobuild/instance-14/output-1/host/bin/arm-buildroot-linux-gnueabi-ld: stm32f469i-disco.c:(.text.startup.main+0x4c0): undefined reference to `__stack_chk_fail'
/home/autobuild/autobuild/instance-14/output-1/host/bin/arm-buildroot-linux-gnueabi-ld: stm32f469i-disco.c:(.text.startup.main+0x4ec): undefined reference to `__stack_chk_guard'

Fixes:
 - http://autobuild.buildroot.org/results/fa6ffab24c3998f21034ab24e8d2852cacde08c1

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

boot/afboot-stm32/0003-Makefile-disable-stack-protector.patch

@@ -0,0 +1,36 @@
+From d65b07d6fe438e760fdbc33a8e42650a27d5b417 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Sat, 31 Dec 2022 11:09:38 +0100
+Subject: [PATCH] Makefile: disable stack-protector
+
+Disable stack-protector to avoid the following build failure:
+
+/home/autobuild/autobuild/instance-14/output-1/host/bin/arm-buildroot-linux-gnueabi-ld -T stm32f429.lds --gc-sections -o stm32f469i-disco.elf stm32f469i-disco.o gpio.o mpu.o qspi.o start_kernel.o usart-f4.o
+/home/autobuild/autobuild/instance-14/output-1/host/bin/arm-buildroot-linux-gnueabi-ld: stm32f469i-disco.o: in function `main':
+stm32f469i-disco.c:(.text.startup.main+0x3b0): undefined reference to `__stack_chk_guard'
+/home/autobuild/autobuild/instance-14/output-1/host/bin/arm-buildroot-linux-gnueabi-ld: stm32f469i-disco.c:(.text.startup.main+0x4c0): undefined reference to `__stack_chk_fail'
+/home/autobuild/autobuild/instance-14/output-1/host/bin/arm-buildroot-linux-gnueabi-ld: stm32f469i-disco.c:(.text.startup.main+0x4ec): undefined reference to `__stack_chk_guard'
+
+Fixes:
+ - http://autobuild.buildroot.org/results/fa6ffab24c3998f21034ab24e8d2852cacde08c1
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ Makefile | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/Makefile b/Makefile
+index 8f42be1..8da7a25 100644
+--- a/Makefile
++++ b/Makefile
+@@ -14,6 +14,7 @@ CFLAGS := -mthumb -mcpu=cortex-m4
+ CFLAGS += -ffunction-sections -fdata-sections
+ CFLAGS += -Os -std=gnu99 -Wall
+ CFLAGS += -fno-builtin
++CFLAGS += -fno-stack-protector
+ LINKERFLAGS := --gc-sections
+ 
+ obj-y += gpio.o mpu.o qspi.o start_kernel.o
+-- 
+2.35.1
+