Yocto Tips

Add GDB to target

conf/local.conf

EXTRA_IMAGE_FEATURES += " tools-debug"
WHITELIST_GPL-3.0 += "gdb"
WHITELIST_GPL-3.0 += "gdbserver"

Do add the licence to whitelist, other wise it will report license error:

Parsing of 1108 .bb files complete (0 cached, 1108 parsed). 1771 targets, 268 skipped, 0 masked, 0 errors.
NOTE: Resolving any missing task queue dependencies
ERROR: Nothing RPROVIDES 'gdb' (but /srv/build-autolinux/poky/meta/recipes-core/packagegroups/packagegroup-core-tools-debug.bb RDEPENDS on or otherwise requires it)
gdb was skipped: it has incompatible license(s): GPL-3.0 LGPL-3.0

Resize root file system size

diff --git a/recipes-xxx-subcore/images/xxx-subcore-image.bb b/recipes-xxx-subcore/images/xxx-subcore-image.bb
index 63cfb05..d7a817f 100644
--- a/recipes-xxx-subcore/images/xxx-subcore-image.bb
+++ b/recipes-xxx-subcore/images/xxx-subcore-image.bb
@@ -6,7 +6,7 @@ inherit core-image chk_security ${@bb.utils.contains('INVITE_PLATFORM', 'fw-upda
 IMAGE_FSTYPES ?= "ext4"
 IMAGE_FSTYPES_xxxxxx= "ext4"
 IMAGE_FSTYPES_xxxxxx = "cpio"
-IMAGE_ROOTFS_SIZE = "10240"
+IMAGE_ROOTFS_SIZE = "409600"

Yocto command

Useful	commands
bitbake-layers show-recipes	Show all recipes
bitbake linux-xxx -c do_listtasks	Show all task of a package
bitbake-layers show-appends	Show bbappends are used
bitbake linux-xxx -c menuconfig	Enter the menuconfig of kernel
bitbake linux-xxx -c devshell	Enter the devshell of a package
bitbake-layers show-recipes “-image-“	Show all support target images
bitbake -g -u depexp	Show the package dependency for image. Example: To show all packages included on fsl-image-gui $ bitbake fsl-image-gui -g -u depexp NOTE: This command will open a UI window, so it must be execute on a console inside the host machine (either virtual or native).

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