curl https://mirrors.tuna.tsinghua.edu.cn/git/git-repo -o repo

chmod a+x repo

export REPO_URL='https://mirrors.tuna.tsinghua.edu.cn/git/git-repo/'

mkdir stm32f429_disc_linux
cd stm32f429_disc_linux
repo init -u git@gitee.com:stm32f429-disco-linux/manifest.git -b master
repo sync

cd stm32f429_disc_linux
. build/envsetup.sh
./build_stm32f429_disc_linux.sh all

~ # .[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.11.12-g2d7aeadb539d (lisongze@gerrit.lisongze.cn) (gcc version 5.4.1 20160919 (release) [ARM/embedded-5-branch revision 240496] (GNU Tools for ARM Embedded Processors) ) #2 PREEMPT Wed Feb 12 23:52:43 CST 2020
[    0.000000] CPU: ARMv7-M [410fc241] revision 1 (ARMv7M), cr=00000000
[    0.000000] CPU: unknown data cache, unknown instruction cache
[    0.000000] OF: fdt: Machine model: STMicroelectronics STM32F429i-DISCO board
[    0.000000] Built 1 zonelists in Zone order, mobility grouping off.  Total pages: 2032
[    0.000000] Kernel command line: root=/dev/ram
[    0.000000] PID hash table entries: 32 (order: -5, 128 bytes)
[    0.000000] Dentry cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.000000] Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.000000] Memory: 7816K/8192K available (1065K kernel code, 100K rwdata, 352K rodata, 59K init, 106K bss, 376K reserved, 0K cma-reserved)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0x00000000 - 0x00001000   (   4 kB)
[    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000]     vmalloc : 0x00000000 - 0xffffffff   (4095 MB)
[    0.000000]     lowmem  : 0x90000000 - 0x90800000   (   8 MB)
[    0.000000]       .text : 0x08008000 - 0x0816a740   (1418 kB)
[    0.000000]       .init : 0x9000a000 - 0x9000d000   (  12 kB)
[    0.000000]       .data : 0x90008000 - 0x90024000   ( 112 kB)
[    0.000000]        .bss : 0x90024000 - 0x9003e928   ( 107 kB)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] Preemptible hierarchical RCU implementation.
[    0.000000]  Build-time adjustment of leaf fanout to 32.
[    0.000000] NR_IRQS:16 nr_irqs:16 16
[    0.000000] /soc/interrupt-controller@40013c00: 23 External IRQs detected
[    0.000000] clocksource: arm_system_timer: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 355517175 ns
[    0.000000] ARM System timer initialized as clocksource
[    0.000000] /soc/timer@40000c00: STM32 clockevent driver initialized (32 bits)
[    0.000000] sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836475000000ns
[    0.010000] Calibrating delay loop... 110.48 BogoMIPS (lpj=552448)
[    0.100000] pid_max: default: 4096 minimum: 301
[    0.100000] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.100000] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.110000] devtmpfs: initialized
[    0.150000] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.150000] pinctrl core: initialized pinctrl subsystem
[    0.230000] stm32-dma 40026000.dma-controller: STM32 DMA driver registered
[    0.240000] stm32-dma 40026400.dma-controller: STM32 DMA driver registered
[    0.240000] clocksource: Switched to clocksource arm_system_timer
[    0.750000] workingset: timestamp_bits=30 max_order=11 bucket_order=0
[    0.790000] io scheduler noop registered (default)
[    0.790000] io scheduler mq-deadline registered
[    0.790000] stm32f429-pinctrl soc:pin-controller: GPIOA bank added
[    0.790000] stm32f429-pinctrl soc:pin-controller: GPIOB bank added
[    0.790000] stm32f429-pinctrl soc:pin-controller: GPIOC bank added
[    0.800000] stm32f429-pinctrl soc:pin-controller: GPIOD bank added
[    0.810000] stm32f429-pinctrl soc:pin-controller: GPIOE bank added
[    0.810000] stm32f429-pinctrl soc:pin-controller: GPIOF bank added
[    0.810000] stm32f429-pinctrl soc:pin-controller: GPIOG bank added
[    0.810000] stm32f429-pinctrl soc:pin-controller: GPIOH bank added
[    0.810000] stm32f429-pinctrl soc:pin-controller: GPIOI bank added
[    0.810000] stm32f429-pinctrl soc:pin-controller: GPIOJ bank added
[    0.820000] stm32f429-pinctrl soc:pin-controller: GPIOK bank added
[    0.820000] stm32f429-pinctrl soc:pin-controller: Pinctrl STM32 initialized
[    0.820000] STM32 USART driver initialized
[    0.820000] 40011000.serial: ttyS0 at MMIO 0x40011000 (irq = 32, base_baud = 5250000) is a stm32-usart
[    1.190000] console [ttyS0] enabled
[    1.200000] stm32_rtc 40002800.rtc: rtc core: registered 40002800.rtc as rtc0
[    1.210000] stm32_rtc 40002800.rtc: Date/Time must be initialized
[    1.230000] input: gpio_keys as /devices/platform/gpio_keys/input/input0
[    1.240000] stm32_rtc 40002800.rtc: setting system clock to 2000-01-01 01:19:23 UTC (946689563)
[    1.250000] Freeing unused kernel memory: 12K
[    1.260000] This architecture does not have kernel memory protection.
can't run '/sbin/swapon': No such file or directory
[    1.600000] random: fast init done
Saving random seed: OK
hello stm32 linux!
                                                                             
                                                                             
 _          _ _             _             _________    _ _                   
| |__   ___| | | ___    ___| |_ _ __ ___ |___ /___ \  | (_)_ __  _   ___  __ 
| '_ \ / _ \ | |/ _ \  / __| __| '_ ` _ \  |_ \ __) | | | | '_ \| | | \ \/ / 
| | | |  __/ | | (_) | \__ \ |_| | | | | |___) / __/  | | | | | | |_| |>  < 
|_| |_|\___|_|_|\___/  |___/\__|_| |_| |_|____/_____| |_|_|_| |_|\__,_/_/\_\ 
                                                                             
                                                                             

Welcome to Buildroot
buildroot login: root
Jan  1 01:19:53 login[39]: root login on 'console'
~ # ls
~ # cd /
/ # ls
bin      init     linuxrc  opt      run      tmp
dev      lib      media    proc     sbin     usr
etc      lib32    mnt      root     sys      var
/ #