You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
1.6 KiB
46 lines
1.6 KiB
From 5448f328ff63a6ca4a64519c2f1dfc63a33df4b7 Mon Sep 17 00:00:00 2001
|
|
From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
|
|
Date: Thu, 10 Sep 2020 11:37:33 +0200
|
|
Subject: [PATCH] Pass -fno-builtin to fix build with gcc 10
|
|
|
|
gcc 10, if it recognizes some hand-written code that looks like
|
|
memcpy, will generate a call to memcpy().
|
|
|
|
For example:
|
|
|
|
while (dst < &_end_data) {
|
|
*dst++ = *src++;
|
|
}
|
|
|
|
gets recognized as such. However, in the context of bare-metal code,
|
|
having a call to memcpy() in the C library doesn't work. So we fix
|
|
that by disabling builtins.
|
|
|
|
Fixes:
|
|
|
|
/home/thomas/projets/buildroot/output/host/opt/ext-toolchain/bin/../arm-buildroot-uclinux-uclibcgnueabi/bin/ld.real: stm32f429i-disco.o: in function `reset':
|
|
stm32f429i-disco.c:(.text.reset+0x1a): undefined reference to `memcpy'
|
|
/home/thomas/projets/buildroot/output/host/opt/ext-toolchain/bin/../arm-buildroot-uclinux-uclibcgnueabi/bin/ld.real: stm32f429i-disco.c:(.text.reset+0x34): undefined reference to `memset'
|
|
make[1]: *** [Makefile:26: stm32f429i-disco] Error 1
|
|
|
|
Upstream: https://github.com/mcoquelin-stm32/afboot-stm32/pull/9
|
|
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
|
|
---
|
|
Makefile | 1 +
|
|
1 file changed, 1 insertion(+)
|
|
|
|
diff --git a/Makefile b/Makefile
|
|
index f699176..1e8557d 100644
|
|
--- a/Makefile
|
|
+++ b/Makefile
|
|
@@ -13,6 +13,7 @@ DTB_ADDR?=0x08004000
|
|
CFLAGS := -mthumb -mcpu=cortex-m4
|
|
CFLAGS += -ffunction-sections -fdata-sections
|
|
CFLAGS += -Os -std=gnu99 -Wall
|
|
+CFLAGS += -fno-builtin
|
|
LINKERFLAGS := -nostartfiles --gc-sections
|
|
|
|
obj-y += gpio.o mpu.o qspi.o start_kernel.o
|
|
--
|
|
2.26.2
|
|
|
|
|