diff options
| -rw-r--r-- | meta/classes/image_types.bbclass | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/meta/classes/image_types.bbclass b/meta/classes/image_types.bbclass index 1bf59a5e3e..8b820182e2 100644 --- a/meta/classes/image_types.bbclass +++ b/meta/classes/image_types.bbclass @@ -60,9 +60,19 @@ def get_imagecmds(d): cmds += "\n" + localdata.getVar("runimagecmd", True) return cmds +# The default aligment of the size of the rootfs is set to 1KiB. In case +# you're using the SD card emulation of a QEMU system simulator you may +# set this value to 2048 (2MiB alignment). +IMAGE_ROOTFS_ALIGNMENT ?= "1" + runimagecmd () { # Image generation code for image type ${type} - ROOTFS_SIZE=`du -ks ${IMAGE_ROOTFS}|awk '{base_size = ($1 * ${IMAGE_OVERHEAD_FACTOR}); OFMT = "%.0f" ; print ((base_size > ${IMAGE_ROOTFS_SIZE} ? base_size : ${IMAGE_ROOTFS_SIZE}) + ${IMAGE_ROOTFS_EXTRA_SPACE}) }'` + # The base_size gets calculated: + # - initial size determined by `du -ks` of the IMAGE_ROOTFS + # - then multiplied by the IMAGE_OVERHEAD_FACTOR + # - then rounded up to IMAGE_ROOTFS_ALIGNMENT + # - finally tested against IMAGE_ROOTFS_SIZE + ROOTFS_SIZE=`du -ks ${IMAGE_ROOTFS}|awk '{base_size = $1 * ${IMAGE_OVERHEAD_FACTOR} + ${IMAGE_ROOTFS_ALIGNMENT} - 1; base_size -= base_size % ${IMAGE_ROOTFS_ALIGNMENT}; print ((base_size > ${IMAGE_ROOTFS_SIZE} ? base_size : ${IMAGE_ROOTFS_SIZE}) + ${IMAGE_ROOTFS_EXTRA_SPACE}) }'` ${cmd} # Now create the needed compressed versions cd ${DEPLOY_DIR_IMAGE}/ |