PetaLinux(Yocto)里包含很多软件模块。大部分模块可以直接使用。如果有特殊需求，需要修改某些模块时，可以按下列办法先修改，测试成功后，再创建补丁，集成到PetaLinux(Yocto)工程里。
比如客户需要修改xorg.conf，可以采用下列方式完成。
工具版本
PetaLinux 2020.1， VCU TRD 2020.1 PetaLinux BSP 工程
选择工具devtool
缺省情况下，PetaLinux使用bitbake。请在“petalinux-config → Yocto settings → Build tool”里，选择devtool。
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ petalinux-config
INFO: sourcing build tools
[INFO] menuconfig project
configuration written to /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/configs/config
*** End of the configuration.
*** Execute 'make' to start the build or try 'make help'.
[INFO] sourcing build environment
[INFO] generating kconfig for Rootfs
[INFO] silentconfig rootfs
[INFO] generating plnxtool conf
[INFO] generating user layers
[INFO] generating workspace directory
[INFO] successfully configured project
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ petalinux-build
INFO: sourcing build tools
[INFO] building project
[INFO] sourcing build environment
[INFO] generating user layers
[INFO] generating workspace directory
[INFO] devtool build-image petalinux-image-minimal
NOTE: Starting bitbake server...
NOTE: Reconnecting to bitbake server...
NOTE: Retrying server connection (#1)...
NOTE: Reconnecting to bitbake server...
NOTE: Previous bitbake instance shutting down?, waiting to retry...
NOTE: Retrying server connection (#2)...
ERROR: OE-core's config sanity checker detected a potential misconfiguration.
Either fix the cause of this error or at your own risk disable the checker (see sanity.conf).
Following is the list of potential problems / advisories:
Error, TMPDIR has changed location. You need to either move it back to /proj/hankf/zcu106/v201/vcu-trd-xv20/build/tmp or delete it and rebuild
Summary: There was 1 ERROR message shown, returning a non-zero exit code.
ERROR: Failed to start bitbake environment
ERROR: Failed to build project
选择devtool，编译报告TMPDIR的错误。之前的TMPDIR设置是工程目录下的“build/tmp”。在执行petalinux-config ，把TMPDIR设置为工程绝对目录，“/proj/hankf/zcu106/v201/vcu-trd-xv20/build/tmp”。
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ petalinux-config
INFO: sourcing build tools
[INFO] menuconfig project
configuration written to /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/configs/config
*** End of the configuration.
*** Execute 'make' to start the build or try 'make help'.
[INFO] sourcing build environment
[INFO] generating kconfig for Rootfs
[INFO] silentconfig rootfs
[INFO] generating plnxtool conf
[INFO] generating user layers
[INFO] generating workspace directory
[INFO] successfully configured project
获取软件包源代码
执行命令“petalinux-build -c
客户需要修改xorg.conf。以xorg为为软件包名，执行命令“petalinux-build -c xorg -x modify”，petalinux报告找不到软件包。
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ petalinux-build -c xorg -x modify
INFO: sourcing build tools
[INFO] building xorg
[INFO] sourcing build environment
[INFO] generating user layers
[INFO] generating workspace directory
[INFO] devtool modify xorg
NOTE: Starting bitbake server...
NOTE: Reconnecting to bitbake server...
NOTE: Retrying server connection (#1)...
NOTE: Reconnecting to bitbake server...
NOTE: Previous bitbake instance shutting down?, waiting to retry...
NOTE: Retrying server connection (#2)...
Loading cache: 100% |########################################################################################################################| Time: 0:00:00
Loaded 4234 entries from dependency cache.
Parsing recipes: 100% |######################################################################################################################| Time: 0:00:05
Parsing of 2967 .bb files complete (2965 cached, 2 parsed). 4236 targets, 168 skipped, 0 masked, 0 errors.
ERROR: Unable to find any recipe file matching "xorg"
ERROR: Failed to build xorg
搜索xorg.conf，可以看到，在目录xserver-xf86-config里有，因此执行命令“petalinux-build -c xserver-xf86-config -x modify”。
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ find -name "*org.conf"
./project-spec/meta-user/recipes-graphics/xorg-xserver/xserver-xf86-config/zynqmp/xorg.conf
./components/yocto/layers/meta-xilinx/meta-xilinx-bsp/recipes-graphics/xorg-xserver/xserver-xf86-config/zynqmp/xorg.conf
./components/yocto/layers/core/meta/recipes-graphics/xorg-xserver/xserver-xf86-config/qemumips64/xorg.conf
./components/yocto/layers/core/meta/recipes-graphics/xorg-xserver/xserver-xf86-config/qemuppc/xorg.conf
./components/yocto/layers/core/meta/recipes-graphics/xorg-xserver/xserver-xf86-config/qemumips/xorg.conf
./components/yocto/layers/core/meta/recipes-graphics/xorg-xserver/xserver-xf86-config/qemuarm/xorg.conf
./components/yocto/layers/core/meta/recipes-graphics/xorg-xserver/xserver-xf86-config/qemux86/xorg.conf
./components/yocto/layers/core/meta/recipes-graphics/xorg-xserver/xserver-xf86-config/qemux86-64/xorg.conf
./components/yocto/layers/core/meta/recipes-graphics/xorg-xserver/xserver-xf86-config/xorg.conf
./components/yocto/layers/core/meta/recipes-graphics/xorg-xserver/xserver-xf86-config/qemush4/xorg.conf
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ petalinux-build -c xserver-xf86-config -x modify
INFO: sourcing build tools
[INFO] building xserver-xf86-config
[INFO] sourcing build environment
[INFO] generating user layers
[INFO] generating workspace directory
[INFO] devtool modify xserver-xf86-config
NOTE: Starting bitbake server...
NOTE: Reconnecting to bitbake server...
NOTE: Retrying server connection (#1)...
NOTE: Reconnecting to bitbake server...
NOTE: Previous bitbake instance shutting down?, waiting to retry...
NOTE: Retrying server connection (#2)...
Loading cache: 100% |########################################################################################################################| Time: 0:00:00
Loaded 4234 entries from dependency cache.
Parsing recipes: 100% |######################################################################################################################| Time: 0:00:05
Parsing of 2967 .bb files complete (2965 cached, 2 parsed). 4236 targets, 168 skipped, 0 masked, 0 errors.
INFO: SRC_URI contains some conditional appends/prepends - will create branches to represent these
NOTE: Resolving any missing task queue dependencies
Initialising tasks: 100% |###################################################################################################################| Time: 0:00:00
Sstate summary: Wanted 0 Found 0 Missed 0 Current 0 (0% match, 0% complete)
NOTE: No setscene tasks
NOTE: Executing Tasks
WARNING: No source unpacked to S - either the xserver-xf86-config recipe doesn't use any source or the correct source directory could not be determined
NOTE: Tasks Summary: Attempted 3 tasks of which 0 didn't need to be rerun and all succeeded.
INFO: Adding local source files to srctree...
INFO: Source tree extracted to /home/hankf/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/xserver-xf86-config
WARNING: SRC_URI is conditionally overridden in this recipe, thus several devtool-override-* branches have been created, one for each override that makes changes to SRC_URI. It is recommended that you make changes to the devtool branch first, then checkout and rebase each devtool-override-* branch and update any unique patches there (duplicates on those branches will be ignored by devtool finish/update-recipe)
INFO: Using source tree as build directory since that would be the default for this recipe
INFO: Recipe xserver-xf86-config now set up to build from /home/hankf/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/xserver-xf86-config
[INFO] successfully built xserver-xf86-config
执行完成后，在目录“components/yocto/workspace/sources”下增加了目录“xserver-xf86-config/“以及文件”xorg.conf“。
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ ls components/yocto/workspace/sources/xserver-xf86-config/
oe-local-files xorg.conf
修改文件
修改相关的文件，比如”xorg.conf“。
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ ls components/yocto/workspace/sources/xserver-xf86-config/
oe-local-files xorg.conf
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ gedit components/yocto/workspace/sources/xserver-xf86-config/xorg.conf &
[1] 3463
测试修改
修改相关的文件，执行命令“petalinux-build -c
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ petalinux-build -c xserver-xf86-config
INFO: sourcing build tools
[INFO] building xserver-xf86-config
[INFO] sourcing build environment
[INFO] generating user layers
[INFO] generating workspace directory
[INFO] Specified component xserver-xf86-config already exists in workspace, Using the same...
[INFO] devtool build xserver-xf86-config
NOTE: Starting bitbake server...
NOTE: Reconnecting to bitbake server...
NOTE: Retrying server connection (#1)...
NOTE: Reconnecting to bitbake server...
NOTE: Previous bitbake instance shutting down?, waiting to retry...
NOTE: Retrying server connection (#2)...
Loading cache: 100% |########################################################################################################################| Time: 0:00:00
Loaded 4234 entries from dependency cache.
Parsing recipes: 100% |######################################################################################################################| Time: 0:00:05
Parsing of 2967 .bb files complete (2964 cached, 3 parsed). 4236 targets, 168 skipped, 0 masked, 0 errors.
Removing 1 recipes from the zcu106_zynqmp sysroot: 100% |####################################################################################| Time: 0:00:00
Loading cache: 100% |########################################################################################################################| Time: 0:00:03
Loaded 4234 entries from dependency cache.
Parsing recipes: 100% |######################################################################################################################| Time: 0:00:05
Parsing of 2967 .bb files complete (2964 cached, 3 parsed). 4236 targets, 168 skipped, 0 masked, 0 errors.
NOTE: Resolving any missing task queue dependencies
Initialising tasks: 100% |###################################################################################################################| Time: 0:00:00
Checking sstate mirror object availability: 100% |###########################################################################################| Time: 0:00:00
Sstate summary: Wanted 6 Found 2 Missed 4 Current 59 (33% match, 93% complete)
NOTE: Executing Tasks
NOTE: Setscene tasks completed
NOTE: xserver-xf86-config: compiling from external source tree /home/hankf/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/xserver-xf86-config
NOTE: Tasks Summary: Attempted 459 tasks of which 450 didn't need to be rerun and all succeeded.
INFO: copy to TFTP-boot directory is not enabled !!
[INFO] successfully built xserver-xf86-config
[1]+ Done gedit components/yocto/workspace/sources/xserver-xf86-config/xorg.conf
提交更改
测试通过后，进入对应软件的目录，比如“components/yocto/workspace/sources/xserver-xf86-config”，通过git命令提交更改。
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/xserver-xf86-config$ git add xorg.confhankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/xserver-xf86-config$ git commit -s
[devtool 23f4304] test
1 file changed, 2 insertions(+)
create mode 100644 test.txt
生成patch
命令“petalinux-build -c
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ petalinux-build -c xserver-xf86-config -x update-recipe
INFO: sourcing build tools
[INFO] building xserver-xf86-config
[INFO] sourcing build environment
[INFO] generating user layers
[INFO] generating workspace directory
[INFO] Specified component xserver-xf86-config already exists in workspace, Using the same...
[INFO] devtool update-recipe xserver-xf86-config -a /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/meta-user -w
NOTE: Starting bitbake server...
NOTE: Reconnecting to bitbake server...
NOTE: Retrying server connection (#1)...
NOTE: Reconnecting to bitbake server...
NOTE: Previous bitbake instance shutting down?, waiting to retry...
NOTE: Retrying server connection (#2)...
Loading cache: 100% |########################################################################################################################| Time: 0:00:00
Loaded 4234 entries from dependency cache.
Parsing recipes: 100% |######################################################################################################################| Time: 0:00:05
Parsing of 2967 .bb files complete (2964 cached, 3 parsed). 4236 targets, 168 skipped, 0 masked, 0 errors.
INFO: Handling main branch (devtool)...
INFO: No patches or local source files needed updating
INFO: Handling branch devtool-override-pn-arm-trusted-firmware...
INFO: No patches or local source files needed updating
INFO: Handling branch devtool-override-pn-device-tree...
INFO: No patches or local source files needed updating
INFO: copy to TFTP-boot directory is not enabled !!
[INFO] successfully built xserver-xf86-config
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ petalinux-build -c xserver-xf86-config -x finish
INFO: sourcing build tools
[INFO] building xserver-xf86-config
[INFO] sourcing build environment
[INFO] generating user layers
[INFO] generating workspace directory
[INFO] Specified component xserver-xf86-config already exists in workspace, Using the same...
[INFO] devtool finish xserver-xf86-config /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/meta-user
NOTE: Starting bitbake server...
NOTE: Reconnecting to bitbake server...
NOTE: Retrying server connection (#1)...
NOTE: Reconnecting to bitbake server...
NOTE: Previous bitbake instance shutting down?, waiting to retry...
NOTE: Retrying server connection (#2)...
Loading cache: 100% |########################################################################################################################| Time: 0:00:00
Loaded 4234 entries from dependency cache.
Parsing recipes: 100% |######################################################################################################################| Time: 0:00:05
Parsing of 2967 .bb files complete (2964 cached, 3 parsed). 4236 targets, 168 skipped, 0 masked, 0 errors.
INFO: Handling main branch (devtool)...
NOTE: Writing append file /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/meta-user/recipes-graphics/xorg-xserver/xserver-xf86-config_%.bbappend
NOTE: Copying xorg.conf to /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/meta-user/recipes-graphics/xorg-xserver/xserver-xf86-config/xorg.conf
INFO: Handling branch devtool-override-pn-arm-trusted-firmware...
INFO: No patches or local source files needed updating
INFO: Handling branch devtool-override-pn-device-tree...
INFO: No patches or local source files needed updating
INFO: Cleaning sysroot for recipe xserver-xf86-config...
INFO: Leaving source tree /home/hankf/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/xserver-xf86-config as-is; if you no longer need it then please delete it manually
[INFO] Removing source tree from workspace: /home/hankf/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/xserver-xf86-config
[INFO] successfully built xserver-xf86-config
执行完成后，目录“project-spec/meta-user/recipes-graphics/xorg-xserver/xserver-xf86-config”下增加了文件xorg.conf。
hankf@XSZGS4:/proj/hankf/zcu106/v201/vcu-trd-xv20/project-spec/meta-user/recipes-graphics/xorg-xserver/xserver-xf86-config$ ls -l
total 8
-rw-rw-r-- 1 hankf hankf 765 Nov 27 14:43 xorg.conf
drwxr-xr-x 2 hankf hankf 4096 Nov 27 15:10 zynqmp
删除软件包
如果测试正常，可以执行命令“petalinux-build -c xserver-xf86-config -x reset”，把软件包从目录workspace删除。ug1144建议使用“devtool reset
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ devtool reset xserver-xf86-config
devtool: command not found
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ petalinux-build -c xserver-xf86-config -x reset
INFO: sourcing build tools
[INFO] building xserver-xf86-config
[INFO] sourcing build environment
[INFO] generating user layers
[INFO] generating workspace directory
[INFO] Specified component xserver-xf86-config already exists in workspace, Using the same...
[INFO] devtool reset xserver-xf86-config
NOTE: Starting bitbake server...
INFO: Cleaning sysroot for recipe xserver-xf86-config...
INFO: Leaving source tree /home/hankf/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/xserver-xf86-config as-is; if you no longer need it then please delete it manually
[INFO] Removing source tree from workspace: /home/hankf/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/xserver-xf86-config
[INFO] successfully built xserver-xf86-config
其它日志
对比下面命令“petalinux-build -c
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/gstreamer-vcu-notebooks$ git add test.txt
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/gstreamer-vcu-notebooks$ git commit -s
[devtool 23f4304] test
1 file changed, 2 insertions(+)
create mode 100644 test.txt
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ petalinux-build -c gstreamer-vcu-notebooks -x update-recipe
INFO: sourcing build tools
[INFO] building gstreamer-vcu-notebooks
[INFO] sourcing build environment
[INFO] generating user layers
[INFO] generating workspace directory
[INFO] Specified component gstreamer-vcu-notebooks already exists in workspace, Using the same...
[INFO] devtool update-recipe gstreamer-vcu-notebooks -a /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/meta-user -w
NOTE: Starting bitbake server...
NOTE: Reconnecting to bitbake server...
NOTE: Retrying server connection (#1)...
NOTE: Reconnecting to bitbake server...
NOTE: Previous bitbake instance shutting down?, waiting to retry...
NOTE: Retrying server connection (#2)...
Loading cache: 100% |########################################################################################################################| Time: 0:00:00
Loaded 4234 entries from dependency cache.
Parsing recipes: 100% |######################################################################################################################| Time: 0:00:05
Parsing of 2967 .bb files complete (2964 cached, 3 parsed). 4236 targets, 168 skipped, 0 masked, 0 errors.
INFO: Handling main branch (devtool)...
NOTE: Writing append file /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/meta-user/recipes-multimedia/gstreamer/gstreamer-vcu-notebooks_%.bbappend
NOTE: Copying 0001-test.patch to /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/meta-user/recipes-multimedia/gstreamer/gstreamer-vcu-notebooks/0001-test.patch
INFO: Handling branch devtool-override-pn-arm-trusted-firmware...
INFO: No patches or local source files needed updating
INFO: Handling branch devtool-override-pn-device-tree...
INFO: No patches or local source files needed updating
INFO: copy to TFTP-boot directory is not enabled !!
[INFO] successfully built gstreamer-vcu-notebooks
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ ls -l ./components/yocto/workspace/sources/gstreamer-vcu-notebooks/
total 20
lrwxrwxrwx 1 hankf hankf 24 Nov 27 16:49 common.py -> oe-local-files/common.py
lrwxrwxrwx 1 hankf hankf 22 Nov 27 16:49 LICENSE -> oe-local-files/LICENSE
drwxr-xr-x 3 hankf hankf 4096 Nov 27 16:30 oe-local-files
lrwxrwxrwx 1 hankf hankf 160 Nov 27 16:36 oe-logs -> /proj/hankf/zcu106/v201/vcu-trd-xv20/build/tmp/work/zynqmpev-xilinx-linux/gstreamer-vcu-notebooks/0.1-r0/temp
lrwxrwxrwx 1 hankf hankf 155 Nov 27 16:36 oe-workdir -> /proj/hankf/zcu106/v201/vcu-trd-xv20/build/tmp/work/zynqmpev-xilinx-linux/gstreamer-vcu-notebooks/0.1-r0
drwxrwxr-x 2 hankf hankf 4096 Nov 27 16:49 pictures
-rw-rw-r-- 1 hankf hankf 11 Nov 27 16:49 test.txt
lrwxrwxrwx 1 hankf hankf 51 Nov 27 16:49 vcu-demo-camera-decode-display.ipynb -> oe-local-files/vcu-demo-camera-decode-display.ipynb
lrwxrwxrwx 1 hankf hankf 58 Nov 27 16:49 vcu-demo-camera-encode-decode-display.ipynb -> oe-local-files/vcu-demo-camera-encode-decode-display.ipynb
lrwxrwxrwx 1 hankf hankf 48 Nov 27 16:49 vcu-demo-camera-encode-file.ipynb -> oe-local-files/vcu-demo-camera-encode-file.ipynb
lrwxrwxrwx 1 hankf hankf 53 Nov 27 16:49 vcu-demo-camera-encode-streamout.ipynb -> oe-local-files/vcu-demo-camera-encode-streamout.ipynb
lrwxrwxrwx 1 hankf hankf 44 Nov 27 16:49 vcu-demo-decode-display.ipynb -> oe-local-files/vcu-demo-decode-display.ipynb
lrwxrwxrwx 1 hankf hankf 53 Nov 27 16:49 vcu-demo-streamin-decode-display.ipynb -> oe-local-files/vcu-demo-streamin-decode-display.ipynb
lrwxrwxrwx 1 hankf hankf 47 Nov 27 16:49 vcu-demo-transcode-to-file.ipynb -> oe-local-files/vcu-demo-transcode-to-file.ipynb
lrwxrwxrwx 1 hankf hankf 52 Nov 27 16:49 vcu-demo-transcode-to-streamout.ipynb -> oe-local-files/vcu-demo-transcode-to-streamout.ipynb
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ petalinux-build -c gstreamer-vcu-notebooks -x finish
INFO: sourcing build tools
[INFO] building gstreamer-vcu-notebooks
[INFO] sourcing build environment
[INFO] generating user layers
[INFO] generating workspace directory
[INFO] Specified component gstreamer-vcu-notebooks already exists in workspace, Using the same...
[INFO] devtool finish gstreamer-vcu-notebooks /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/meta-user
NOTE: Starting bitbake server...
NOTE: Reconnecting to bitbake server...
NOTE: Retrying server connection (#1)...
NOTE: Reconnecting to bitbake server...
NOTE: Previous bitbake instance shutting down?, waiting to retry...
NOTE: Retrying server connection (#2)...
Loading cache: 100% |########################################################################################################################| Time: 0:00:00
Loaded 4234 entries from dependency cache.
Parsing recipes: 100% |######################################################################################################################| Time: 0:00:05
Parsing of 2967 .bb files complete (2964 cached, 3 parsed). 4236 targets, 168 skipped, 0 masked, 0 errors.
INFO: Handling main branch (devtool)...
NOTE: Writing append file /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/meta-user/recipes-multimedia/gstreamer/gstreamer-vcu-notebooks_%.bbappend
NOTE: Copying 0001-test.patch to /home/hankf/proj/zcu106/v201/vcu-trd-xv20/project-spec/meta-user/recipes-multimedia/gstreamer/gstreamer-vcu-notebooks/0001-test.patch
INFO: Handling branch devtool-override-pn-arm-trusted-firmware...
INFO: No patches or local source files needed updating
INFO: Handling branch devtool-override-pn-device-tree...
INFO: No patches or local source files needed updating
INFO: Cleaning sysroot for recipe gstreamer-vcu-notebooks...
INFO: Leaving source tree /home/hankf/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/gstreamer-vcu-notebooks as-is; if you no longer need it then please delete it manually
[INFO] Removing source tree from workspace: /home/hankf/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/gstreamer-vcu-notebooks
[INFO] successfully built gstreamer-vcu-notebooks
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ ls -l ./components/yocto/workspace/sources/gstreamer-vcu-notebooks/
ls: cannot access '/home/hankf/proj/zcu106/v201/vcu-trd-xv20/components/yocto/workspace/sources/gstreamer-vcu-notebooks/': No such file or directory
另外也可以发现，命令自动创建了文件project-spec/meta-user/recipes-multimedia/gstreamer/gstreamer-vcu-notebooks_%.bbappend，自动复制了文件0001-test.patch到目录project-spec/meta-user/recipes-multimedia/gstreamer/gstreamer-vcu-notebooks。
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ ls -l project-spec/meta-user/recipes-multimedia/gstreamer/gstreamer-vcu-notebooks
total 4
-rw-rw-r-- 1 hankf hankf 440 Nov 27 16:53 0001-test.patch
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ cat project-spec/meta-user/recipes-multimedia/gstreamer/gstreamer-vcu-notebooks_%.bbappend
FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
SRC_URI += "file://0001-test.patch"
hankf@XSZGS4:~/proj/zcu106/v201/vcu-trd-xv20$ cat project-spec/meta-user/recipes-multimedia/gstreamer/gstreamer-vcu-notebooks/0001-test.patch
From 23f430438ac6cb1e2e712916f0136fe8a0c8075e Mon Sep 17 00:00:00 2001
From: Hank Hanjie Fu <hankf@xilinx.com>
Date: Fri, 27 Nov 2020 16:47:50 +0800
Subject: [PATCH] test
Signed-off-by: Hank Hanjie Fu <hankf@xilinx.com>
---
test.txt | 2 ++
1 file changed, 2 insertions(+)
create mode 100644 test.txt
diff --git a/test.txt b/test.txt
new file mode 100644
index 0000000..a8a04d9
--- /dev/null
+++ b/test.txt
@@ -0,0 +1,2 @@
+
额外说明
/recipes-graphics/xorg-xserver/xserver-xf86-config/zynqmp和/recipes-graphics/xorg-xserver/xserver-xf86-config/都有xorg.conf。 生效的是文件 ./recipes-graphics/xorg-xserver/xserver-xf86-config/zynqmp/xorg.conf。 文件./recipes-graphics/xorg-xserver/xserver-xf86-config/xorg.conf没有生效。
参考文档
来源
https://www.yoctoproject.org/software-item/devtool/
原文
The cornerstone of the extensible SDK is a command-line tool called devtool. This tool provides a number of features that help you build, test and package software within the extensible SDK, and optionally integrate it into an image built by the OpenEmbedded build system.
The devtool command line is organized similarly to Git in that it has a number of sub-commands for each function. You can run devtool –help to see all the commands.
Three devtool subcommands that provide entry-points into development are:
devtool add: Assists in adding new software to be built. devtool modify: Sets up an environment to enable you to modify the source of an existing component. devtool upgrade: Updates an existing recipe so that you can build it for an updated set of source files. As with the OpenEmbedded build system, “recipes” represent software packages within devtool. When you use devtool add, a recipe is automatically created. When you use devtool modify, the specified existing recipe is used in order to determine where to get the source code and how to patch it. In both cases, an environment is set up so that when you build the recipe a source tree that is under your control is used in order to allow you to make changes to the source as desired. By default, both new recipes and the source go into a “workspace” directory under the SDK.
google翻译
可扩展SDK的基础是称为devtool的命令行工具。该工具提供了许多功能，可帮助您在可扩展的SDK中构建，测试和打包软件，还可以选择将其集成到OpenEmbedded构建系统构建的映像中。
devtool命令行的组织方式与Git相似，因为每个功能都有许多子命令。您可以运行devtool –help来查看所有命令。
提供开发入口点的三个devtool子命令是：
devtool add：协助添加要构建的新软件。 devtool Modify：设置环境以使您能够修改现有组件的源。 devtool升级：更新现有配方，以便您可以为一组更新的源文件构建它。 与OpenEmbedded构建系统一样，“配方”代表devtool中的软件包。使用devtool add时，将自动创建一个配方。使用devtool Modify时，将使用指定的现有配方来确定从何处获取源代码以及如何对其进行修补。在这两种情况下，都将建立一个环境，以便在构建配方时使用位于您控制之下的源树，以允许您根据需要对源进行更改。默认情况下，新配方和源都进入SDK下的“工作区”目录。