额外的命令在树莓皮u-boot使用yocto。

Question

我想在raspberry pi u-boot中使用yocto添加一个自定义命令，我能够使用make添加自定义，按照这里提供的答案。实现自定义u-boot命令

现在我想在raspberry pi中使用yocto添加它。但首先我想在u-boot中添加定时器命令，它存在于 misc.c 在u-boot源码中，我们只需在其中加入 CONFIG_CMD_TIMER=y 文件中的

到目前为止，我尝试了以下设置

1. 克隆木
2. 克隆的元树莓皮。
3. 在local.conf中启用了u-boot和uart。
4. 创建了一个自定义图层（在 bblayers.conf)来添加命令config

自定义层中的配方细节

1. 创建以下目录结构

meta-custom-layer/recipes-bsp/u-boot/

2. 创建了 .bbappend 含有以下内容的文件

$ cat meta-custom-layer/recipes-bsp/u-boot/u-boot_%.bbappend
FILESEXTRAPATHS_prepend := "${THISDIR}:"
SRC_URI += " file://rpi_3_defconfig.patch;patchdir=${S}/configs "

3. 的内容 meta-custom-layer/recipes-bsp/u-boot/

$ ls -l meta-custom-layer/recipes-bsp/u-boot/
drwxr-xr-x 2 bhargav bhargav 4096 May 16 22:04 files
-rw-r--r-- 1 bhargav bhargav  107 May 16 22:04 u-boot_%.bbappend

$ cat meta-custom-layer/recipes-bsp/u-boot/files/rpi_3_defconfig.patch
CONFIG_CMD_TIMER=y

4. 当构建u-boot时，得到以下错误信息。

$ bitbake u-boot
Loading cache: 100% |########################################################################################################################################################################| Time: 0:00:00
Loaded 2875 entries from dependency cache.
NOTE: Resolving any missing task queue dependencies

Build Configuration:
BB_VERSION           = "1.46.0"
BUILD_SYS            = "x86_64-linux"
NATIVELSBSTRING      = "universal"
TARGET_SYS           = "aarch64-poky-linux"
MACHINE              = "raspberrypi3-64"
DISTRO               = "poky"
DISTRO_VERSION       = "3.1"
TUNE_FEATURES        = "aarch64 cortexa53 crc"
TARGET_FPU           = ""
meta                 
meta-poky            
meta-yocto-bsp       = "master:2e11d97b6c95e89aa1f9d3603a966c94c442469e"
meta-raspberrypi     = "master:45ee64377bcc511380edf59191abc90c1ddb210e"
meta-shell           = "master:81fd3448f603a56409389247443439cad4fdaa67"
meta-oe              = "master:679bb4912613f3860e8527557602251e5e5f2c41"
meta-python2         = "master:2684086f91e7074324081196c8a5f9945d39650e"

Initialising tasks: 100% |###################################################################################################################################################################| Time: 0:00:00
Sstate summary: Wanted 16 Found 8 Missed 8 Current 135 (50% match, 94% complete)
NOTE: Executing Tasks
WARNING: u-boot-1_2020.04-r0 do_fetch: Failed to fetch URL file://rpi_3_defconfig.patch;patchdir=/home/bhargav/RPI3/Build/poky/build/tmp/work/raspberrypi3_64-poky-linux/u-boot/1_2020.04-r0/git/configs, attempting MIRRORS if available
ERROR: u-boot-1_2020.04-r0 do_fetch: Fetcher failure: Unable to find file file://rpi_3_defconfig.patch;patchdir=/home/bhargav/RPI3/Build/poky/build/tmp/work/raspberrypi3_64-poky-linux/u-boot/1_2020.04-r0/git/configs anywhere. The paths that were searched were:
    /home/bhargav/RPI3/Build/meta-shell/recipes-bsp/u-boot/poky
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot-2020.04/poky
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot/poky
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/files/poky
    /home/bhargav/RPI3/Build/meta-shell/recipes-bsp/u-boot/raspberrypi3-64
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot-2020.04/raspberrypi3-64
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot/raspberrypi3-64
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/files/raspberrypi3-64
    /home/bhargav/RPI3/Build/meta-shell/recipes-bsp/u-boot/raspberrypi3
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot-2020.04/raspberrypi3
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot/raspberrypi3
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/files/raspberrypi3
    /home/bhargav/RPI3/Build/meta-shell/recipes-bsp/u-boot/aarch64
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot-2020.04/aarch64
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot/aarch64
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/files/aarch64
    /home/bhargav/RPI3/Build/meta-shell/recipes-bsp/u-boot/rpi
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot-2020.04/rpi
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot/rpi
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/files/rpi
    /home/bhargav/RPI3/Build/meta-shell/recipes-bsp/u-boot/aarch64
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot-2020.04/aarch64
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot/aarch64
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/files/aarch64
    /home/bhargav/RPI3/Build/meta-shell/recipes-bsp/u-boot/
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot-2020.04/
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot/
    /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/files/
    /home/bhargav/RPI3/Build/poky/build/downloads
ERROR: u-boot-1_2020.04-r0 do_fetch: Fetcher failure for URL: 'file://rpi_3_defconfig.patch;patchdir=/home/bhargav/RPI3/Build/poky/build/tmp/work/raspberrypi3_64-poky-linux/u-boot/1_2020.04-r0/git/configs'. Unable to fetch URL from any source.
ERROR: Logfile of failure stored in: /home/bhargav/RPI3/Build/poky/build/tmp/work/raspberrypi3_64-poky-linux/u-boot/1_2020.04-r0/temp/log.do_fetch.13694
ERROR: Task (/home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot_2020.04.bb:do_fetch) failed with exit code '1'
NOTE: Tasks Summary: Attempted 592 tasks of which 591 didn't need to be rerun and 1 failed.

Summary: 1 task failed:
  /home/bhargav/RPI3/Build/poky/meta/recipes-bsp/u-boot/u-boot_2020.04.bb:do_fetch
Summary: There was 1 WARNING message shown.
Summary: There were 2 ERROR messages shown, returning a non-zero exit code.

那么，我在这里错过了什么？我使用的是raspberry pi 3B+ .

Answer 1

FILESEXTRAPATHS_append := "${THISDIR}文件"