The following make configuration flags are supported:
| Variable | Required | Value type | Default value | Description |
|---|---|---|---|---|
CTARGET |
yes | String | (user defined) | Specify a tuple (https://wiki.gentoo.org/wiki/Embedded_Handbook/Tuples). |
V |
no | Integer | 0 |
Controls the verbosity of the build system. |
J |
no | Integer | number of cores | Define the number of threads to use during compilation. |
L |
no | Integer | (user defined) | Specify the maximum system load to prevent CPU starvation. |
GENTOO_TAG |
no | String | from Makefile | Determine the <date> of the Gentoo Docker image to use as a base for the build system. |
GENTOO_MIRRORS |
no | String | (user defined) | Define the <url(s)> of the Gentoo mirrors to use to fetch package distfiles. |
CACHE_FROM |
no | String | (user defined) | Specify a local or remote Docker image from which to fetch the build cache. |
NO_CACHE |
no | Boolean | 0 |
Set to 1 to force Docker not to use caching. |
USE_CCACHE |
no | Boolean | 1 |
Set to 0 to disable compiler cache, which is enabled by default. |
KERNEL_REMOTE |
no | String | (user defined) | Force a specific kernel Git repository remote location. |
KERNEL_BRANCH |
no | String | (user defined) | Force a specific kernel Git repository branch. |
KERNEL_CONFIG |
no | String | (user defined) | Force a specific kernel configuration file. |
WITH_ROOTFS |
no | Boolean | 0 |
Enable to package the target root filesystem as a compressed TAR archive in addition to generating the platform images. |
USE |
no | String | (user defined) | Force a specific USE combination for the package target. |
PACKAGE |
yes, for package target |
String | (user defined) | Determine which package to build for the package target. |
Few examples for illustrative purposes are shared below:
make GENTOO_MIRRORS="http://mirror.netcologne.de/gentoo/" PACKAGE="sys-apps/ethtool" package_package
make V=1 WITH_ROOTFS=1 NO_CACHE=1 GENTOO_TAG=20210522 CTARGET=aarch64-unknown-linux-gnu package_tn48m
make J=64 L=64 CTARGET=armv7a-unknown-linux-gnueabihf package_vmlinux
Additional resources for removing and adding new packages are available on the Gentoo Wiki.