iMX6 iMX6ul iMX7

How to build U-Boot and Kernel in standalone environment

Generate an SDK from the Yocto Project build environment

cd ${BUILDDIR}
DISTRO=fsl-imx-fb MACHINE=cl-som-imx6 bitbake core-image-minimal -c populate_sdk
EXPORT environment_setup=$(find  tmp/work | awk '/core-image-minimal.*environment-setup/')

Kernel/U-Boot Source Code

Set a target

• cl-som-imx6 |Kernel|U-Boot| |-|-| |export TARGET=linux-compulab|export TARGET=u-boot-compulab| |export DEFCONFIG=cl_som_imx6_defconfig|export DEFCONFIG=cl_som_imx6_defconfig|

• cl-som-imx6ul |Kernel|U-Boot| |-|-| |export TARGET=linux-compulab|export TARGET=u-boot-compulab| |export DEFCONFIG=cl_som_imx6_defconfig|export DEFCONFIG=cl_som_imx6_defconfig|

• cl-som-imx7 |Kernel|U-Boot| |-|-| |export TARGET=linux-compulab|export TARGET=u-boot-compulab| |export DEFCONFIG=compulab_imx7_defconfig|export DEFCONFIG=cl_som_imx7_defconfig|

Retrieve the target information

bitbake -c devshell ${TARGET}
mkdir -p ${BUILDDIR}/../ooye/${TARGET}
${BUILDDIR}/../sources/meta-compulab-imx8/bb-tools/getenv > ${BUILDDIR}/../ooye/${TARGET}/.rc
exit

Clone the target source code & patch it

cd ${BUILDDIR}/../ooye/${TARGET}
source ${BUILDDIR}/../ooye/${TARGET}/.rc
git clone ${ORIGIN} src
git -C src checkout -b development ${HEAD}
git -C src am ${PATCHES}/*.patch

Building the target

• Set the environment with the following command before building.

source ${environment_setup}

• Issue build for the target this way:

make -C src ${DEFCONFIG}
make -C src -j8