I am new to bitbake. and I have multiple questions all related to each other.
I am trying to remove all the packages that are GPLv3 from my package. i see that there are .bb files for both versions (gplv2 and gplv3 or other license types as applicable), of packages in meta/recipes-*/ folders. If I use INCOMPATIBLE_LICENSE=GPLv3 it removes all the packages that are GPLv3. But I want to include some packages that are GPLv3. where do i specify this.
I do see a BBFILES flag in the bblayers.conf in poky/build/conf dir. is this this place to add the specific recipes?
Another question i have is, If i want to use a specific .bb file out of the multiple .bb files in the recipes-/ folder how do i do that. for example
/recipes-extended/tar/tar_1.17.bb
/tar_1.27.1.bb
In this case, how do i pick tar_1.17.bb and ignore 1.27.bb. This is just one example. There is a "bitbake -b" command that takes .bb file as input but that will build only that .bb file and ignore dependencies according to the documentation. I want to build the complete package and be able to pick and ignore a specific .bb file.
So, how does bitbake pick and more pricisely which .bb file does bitbake pick when there are multiple .bb files in the recipe folder.
1 There's no way to do that. What would the purpose be? Normally, if you want to avoid GPLv3, you want a completely GPLv3 free image
There's one way to circumvent the system. You can set
INCOMPATIBLE_LICENSE_pn-<package/recipe name> = ""
That will allow you to build the package. However, don't use this for production, unless you really know what you're doing.
2/3: Normally the highest version will be built. You can use
PREFERRED_VERSION_<package name>
in local.conf or in your distro, to select another version. Another way is to add
DEFAULT_PREFERENCE = "-1"
to the recipe you don't want to build.
You should be able to set
WHITELIST_<spdx_license> += "<name of the package which you want to white list>"
Not very well documented but the code is in poky/meta/base.bbclass
Related
I am trying to determine how I can find what recipe a source file from the build/tmp/work directory came from. Basically normally most of the recipes in the source folder are uri. Then get downloaded and installed to various temp folders. I want to create a patch for some of the files, but I can't seem to figure out which files belong to what recipes.
Thank you
Run oe-pkgdata-util find-path /path/on/target/to/file. This will give you the package installing the file. From there, run oe-pkgdata-util lookup-recipe <pkg-name>, this will give you which recipe is creating the package. That should be enough to find out which recipe you need to modify. You then need to check whether the file you want to modify is part of the recipe (Yocto artifact) or part of the software that the recipe builds. For the former, you can override the file, for the latter, you can create a patch (you can use devtool to help you create the patch).
Is there anyway I can just call into a define such as LIBFOO_DIRCLEAN, and just do what was implemented in the define?
Inside HOST_LIBFOO_INSTALL_CMDS, I copy files to the target directory, and would like the 'make package-dirclean' to delete what was copied into the target directory. 'make clean', would obviously do this(any many more), but that is much more than I want to do.
I see the following buildroot variables. LIBFOO_EXTRACT_CMDS, LIBFOO_CONFIGURE_CMDS, LIBFOO_BUILD_CMDS, HOST_LIBFOO_INSTALL_CMDS, LIBFOO_INSTALL_TARGET_CMDS, etc.
make foo-dirclean is a simple tool that just deletes the package build directory. In most cases, when the list of files installed by a package does not change over time (only files content changes) you can simply rebuild the package and the target directory will be rebuilt correctly.
If you want you can implement your own foo-myclean step that implements your own logic. However you must understand deleting files in the target directory is not supported by Buildroot and thus you are on your own.
For an application I am running, there is a run time error as it cannot find libwayland-client.so.0 shared object. How do I know which package provides it and where do I add it. I tried as shown below but it gave me a Nothing PROVIDES error.
CORE_IMAGE_EXTRA_INSTALL += "libwayland-client"
You don't typically work with single files when building Yocto images
In reverse order
You install packages to the image
You build packages by using a recipe
You find (or as a last resort write) recipes as part of layers.
Generally when something is missing you take the following steps:
Check the layerindex https://layers.openembedded.org/layerindex/branch/master/recipes/?q=wayland It tells you that there is a recipe called wayland in layer openembedded-core
Add the layer in question. openembedded-core is already contained in Yocto's poky (directly under the name meta, just to confuse the newcomer...), so nothing to add in this example
Create the environment listing of the recipe in question, bitbake -e wayland >wayland.env
Check what packages the recipe in question creates grep ^PACKAGES= wayland.env. In this case it is easy because there is really only one package wayland (-debug, -dev etc. are special purpose that would not contain the library)
Add a package to the image by its package name. How to do that exactly depends on the image type you create. The variable name given in the question works for some images, but not all. Search for IMAGE_INSTALL in the manual https://www.yoctoproject.org/docs/2.6.1/mega-manual/mega-manual.html for other options.
Once you have built the recipe in question you can also check what files are contained in a package (In this case recipe name and package name are identical, but that is not always the case. Some recipes build more than one package suitable for installation, so obviously they need to use different names)
$ oe-pkgdata-util list-pkg-files wayland
wayland:
/usr/lib/libwayland-client.so.0
/usr/lib/libwayland-client.so.0.3.0
/usr/lib/libwayland-cursor.so.0
/usr/lib/libwayland-cursor.so.0.0.0
/usr/lib/libwayland-server.so.0
/usr/lib/libwayland-server.so.0.1.0
In my yocto source deploy/images/beaglebone dir is nearly 100GB so i want to free that memory
Please help me how can I delete that deploy dir either manually or via command line
I want to clean all images(*.tar.gz,*.sdcard, *.ubifs) of previous compilation in yocto deploy/images/beaglebone/
Maybe when you are with 100GB in the deploy directory, things have gone too far already.
Check your IMAGE_FSTYPES variable. My experience says it is safe to delete all images of these files that are not symlinks, or symlinks targets. Avoid the last one generated to avoid breaking the last build link, and any related with bootloaders and configuration files, as they could be rarely regenerated.
If you are keeping more than one build with the same set of layers, then you can use a common download folder for builds.
DL_DIR ?= "common_dir_across_all_builds/downloads/"
And afterwards:
To keep your /deploy clean:
RM_OLD_IMAGE: Reclaims disk space by removing previously built versions of the same image from the images directory pointed to by the DEPLOY_DIR variable.Set this variable to "1" in your local.conf file to remove these images:
RM_OLD_IMAGE = "1"
IMAGE_FSTYPES Remove the image types that you do not plan to use, you can always enable a particular one when you need it:
IMAGE_FSTYPES_remove = "tar.bz2"
IMAGE_FSTYPES_remove = "rpi-sdimg"
IMAGE_FSTYPES_remove = "ext3"
For /tmp/work, do not need all the workfiles of all recipes. You can specify which ones you are interested in your development.
RM_WORK_EXCLUDE:
With rm_work enabled, this variable specifies a list of recipes whose work directories should not be removed. See the "rm_work.bbclass" section for more details.
INHERIT += "rm_work"
RM_WORK_EXCLUDE += "home-assistant widde"
try this from your build root rm -fr deploy/images. Here is a good discussion on the topic
I just removed the files manually like below
1. goto build/deploy/images/beaglebone
2. $ ll : you will find the softlinks of rootfs with time like
......*20170811091521.rootfs.tar.gz
......*-20170811091521.rootfs.sdcard etc
3. Dont delete recently compiled files. except these this you can remove all *.tar.gz, *.sdcard,*.ext4 manually like below,
4. rm beaglebone-20170811091521.rootfs.tar.gz
rm beaglebone-20170811091521.rootfs.sdcard
rm beaglebone-20170811091521.rootfs.ext4 etc.
I'm new to yocto. I'm trying to learn how the packages are added, how to create new layers and so on... just poking around. Started by cloning poky and playing around.
To my understanding, the bblayers.conf file is critical to the project configuration and what you end up building (what layers and packages go into your final image).
This might be the wrong assumption, but I also have a feeling that the build/ folder is where things you build (bitbake) stay. Images, lots of things needed to build them, a big cache of stuff... You can delete it and rebuild it if you somehow broke it. Or you can just copy everything without the build/ folder and continue working on a different computer.
Apparently it's not quite the case. The build/conf/ folder has the important .conf files like the bblayers.conf.
Can someone explain why is this the case? Is there an elegant way to separate the project config and the build folder?
There are a couple layers to the Yocto Project, mainly:
-BSPDIR: TOPDIR (build),sources,setup-environment
-BSPDIR/setup-environment: initial all the variable to for bitbake;
-BSPDIR/sources: meta-data/
-TOPDIR: conf/ sstate-cache/ cache/ tmp/ downloads/
-TOPDIR/downloads: recipe fetched packages;
-TOPDIR/conf/ : stored all the configuration. Mainly bblayers.conf, local.conf, sanity_info;
-TOPDIR/conf/bblayers.conf: stored all the path to meta-data that will be loaded;
-TOPDIR/conf/local.conf: configuration to build
-TOPDIR/conf/sanity_info: path double check to make sure that all the path used in the last compile match the current compile;
-TOPDIR/tmp/: Where all the compiling and building work happen
In BSPDIR/sources/poky/meta/conf/bitbake.conf
sources/poky/meta/conf/bitbake.conf:TMPDIR ?= "${TOPDIR}/tmp"
sources/poky/meta/conf/bitbake.conf:PERSISTENT_DIR = "${TOPDIR}/cache"
sources/poky/meta/conf/bitbake.conf:DL_DIR ?= "${TOPDIR}/downloads"
sources/poky/meta/conf/bitbake.conf:SSTATE_DIR ?= "${TOPDIR}/sstate-cache"
TOPDIR is where you initialize when run setup-environment or oe-init-build-env; All the other bitbake configuration environment variable can be changed based on your need in conf/local.conf;
e.g. modify conf/local.conf to change the downloads directory from TOPDIR/downloads;
DL_DIR ?= "/home/downloads/"
To create new layer, please watch this video: https://www.youtube.com/watch?v=3HsaoVqX7dg
You might have followed the Yocto Project Quick Start Guide.
The earliest step in yocto after installing (cloning git repositories and installing packages) is to create your OE (OpenEmbedded) environment, which is done via:
source oe-init-build-env
This automatically creates and leads you to the build folder.
Matter that you can give any directory of your system as parameter for this call (Reference Manual - Build Overview):
source oe-init-build-env [build_dir]
⤑ This is also the step, where your 'project config' is separated from the actual build folder.
⤑ As you assumed, in practice you would at most copy the layers and not the build folder. Even better is to leave sources from others in their git repositories and only copy and maintain your own layers.
it is true an issue in the modern Yocto build system.
file bblayers.conf has to be synthesized based on MACHINE and DISTRO information using all provided (usually with the help of repo manifest file) layers by: collecting data from each available layer file layer.conf as well as conf/machine, conf/distro, images.
Instead bblayers.conf is usually copied over from the base layer conf/bblayers.conf location with the help of setup-environment script.
this approach provides no "one click" buildable environment but require maintainer/developer to look into readme to identify what layers are missing to be added to the build/conf/bblayers.conf.