Difference between revisions of "Add build information into a Yocto image"
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Revision as of 18:00, 12 March 2021
Creating Add build information into a Yocto image
Importing variables into the device with buildinfo
There is a little known image feature in Yocto called buildinfo that will help us get the required information. Buildinfo is available in Yocto 1.8 and later versions. This image feature will write a set of OpenEmbedded variables to a file /etc/build in the image, which in turn gets written to the target device.
To enable buildinfo, open conf/local.conf and append
INHERIT += "image-buildinfo" IMAGE_BUILDINFO_VARS_append = " DATETIME DISTRO_NAME IMAGE_BASENAME MACHINE TUNE_PKGARCH" IMAGE_BUILDINFO_VARS_append = " MACHINE_FEATURES DISTRO_FEATURES COMMON_FEATURES IMAGE_FEATURES" IMAGE_BUILDINFO_VARS_append = " TUNE_FEATURES TARGET_FPU" IMAGE_BUILDINFO_VARS_append = " APP_URI_PREFIX APP_URI_BRANCH"
Then build the desired image, e.g. with bitbake -k core-image-minimal. And run the image, e.g. with runqemu qemuarm nographic, and look at the file generated in /etc/build.
A sample resulting /etc/build file is shown below.
----------------------- Build Configuration: | ----------------------- DISTRO = poky DISTRO_VERSION = 3.1.5 DATETIME = 20210312175409 DISTRO_NAME = Poky (Yocto Project Reference Distro) IMAGE_BASENAME = core-image-minimal MACHINE = qemuarm TUNE_PKGARCH = armv7vet2hf-neon MACHINE_FEATURES = alsa bluetooth usbgadget screen vfat rtc qemu-usermode DISTRO_FEATURES = acl alsa argp bluetooth ext2 ipv4 ipv6 largefile pcmcia usbgadget usbhost wifi xattr nfs zeroconf pci 3g nfc x11 vfat largefile opengl ptest multiarch wayland vulkan pulseaudio sysvinit gobject-introspection-data ldconfig COMMON_FEATURES = IMAGE_FEATURES = debug-tweaks package-management ssh-server-openssh TUNE_FEATURES = arm armv7ve vfp thumb neon callconvention-hard TARGET_FPU = hard APP_URI_PREFIX = APP_URI_BRANCH = ----------------------- Layer Revisions: | ----------------------- meta = dunfell:dc38d5e494e53a7a03d5bd8d2429d0ef54cfbbbc meta-poky = dunfell:dc38d5e494e53a7a03d5bd8d2429d0ef54cfbbbc meta-yocto-bsp = dunfell:dc38d5e494e53a7a03d5bd8d2429d0ef54cfbbbc meta-oe = dunfell:de37512b25c1f8c6bb6ab2b3782ac0fe01443483
