How to successfully compile U-Boot?

I have spent several days trying to solve this problem, but found none of them working.

But fortunately I solved this after pits and pits.

I was tying to build uboot 2017.11.

pit 1. no config

sudo apt-get install -y bison flex

make socfpga_de10_nano_defconfig

pit 2. no gcc

apt-get install crossbuild-essential-armhf

pit 3. cc1: error: bad value (‘generic-armv7-a’) for ‘-mtune=’ switch

export ARCH=arm;export CROSS_COMPILE=arm-linux-gnueabihf-

or

make V=1 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-

pit 4. tc-parser.tab.o:(.bss+0x10): multiple definition of `yylloc'; scripts/dtc/dtc-lexer.lex.o:(.bss+0x0): first defined here

nano scripts/dtc/dtc-lexer.lex.c
//YYLTYPE yylloc;
extern YYLTYPE yylloc;

pit 5. arm-linux-gnueabihf-gcc: error: unrecognized -march target: armv5

this took me 2-days to solve, if did armv7 or armv5t it would give you something like this.

arch/arm/cpu/armv7/cache_v7.c
{standard input}:35: Error: selected processor does not support `mcr p15,0,r3,c7,c5,0' in Thumb mode

nano .\arch\arm\Makefile

# Replace
# arch-$(CONFIG_CPU_V7) =$(call cc-option, -march=armv7-a, \
# $(call cc-option, -march=armv7, -march=armv5))
arch-$(CONFIG_CPU_V7) =$(call cc-option, -march=armv7-a, \
$(call cc-option, -march=armv7-a, -march=armv7-a))

Through these pits, you should be able to compile the u-boot.

pit 6. You may follow this guide to plant uboot into SDCard

https://github.com/ikwzm/FPGA-SoC-U-Boot-DE10-Nano

The patch is not necessary.

Device Boot Start End Sectors Size Id Type
/dev/sdc1 18432 223231 204800 100M b W95 FAT32
/dev/sdc2 223232 61765631 61542400 29.4G 83 Linux
/dev/sdc3 2048 18431 16384 8M a2 unknown

$ dd if=u-boot-spl.sfp of=/dev/sdc3 bs=64k seek=0
$ dd if=u-boot.img of=/dev/sdc3 bs=64k seek=4