Offline compilation can be enabled by defining local directories for downloads and sstate when configuring a PetaLinux project. It can also be done by configuring PetaLinux installation so that new projects are created with offline compilation enabled by default.
The introduced methodology applies to other architectures as well. The locations of the files may differ depending how you install PetaLinux.
1. downloads
Suppose downloads folder is located in $PETALINUX/downloads.
For Zynq, edit $PETALINUX/etc/template/project/template-zynq/project-spec/configs/config
For ZynqMP, edit $PETALINUX/etc/template/project/template-zynqMP/project-spec/configs/config:
CONFIG_PRE_MIRROR_URL="file://$PETALINUX/downloads"
2. sstate-cache
Suppose sstate folder is located in $PETALINUX/tool/sstate
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Preferred method
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For Zynq: edit
$PETALINUX/etc/template/project/template-zynq/project-spec/configs/configCONFIG_YOCTO_NETWORK_SSTATE_FEEDS_URL="file://$PETALINUX/tool/sstate/arm" -
For ZynqMP: edit
$PETALINUX/etc/template/project/template-zynqMP/project-spec/configs/configCONFIG_YOCTO_NETWORK_SSTATE_FEEDS_URL="file://$PETALINUX/tool/sstate/aarch64"
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Non-preferred method
Need to change definition when switching between architectures.
In
$PETALINUX/components/misc/config/Kconfig.part:config YOCTO_LOCAL_SSTATE_FEEDS_URL string "local sstate feeds url" # for zynq default "$PETALINUX/sstate/arm/" # for zynqMP default "$PETALINUX/sstate/aarch64/" ... ... config YOCTO_BB_NO_NETWORK bool "Enable BB NO NETWORK" default y ...
