add a variable to yocto SDK environment setup script - yocto

Question

How to add a environment variable to yocto SDK environment setup script.
export CODE_ARGS = "${SAMPLE_ARGS}"
I want to add this CODE to SDK environment setup script.

Answer 1

These steps might depend on which Yocto release you are using, but the general idea should be the same.
Steps for Yocto kirkstone:
Looking at the end of the environment setup script you should see something like
# Append environment subscripts
if [ -d "$OECORE_TARGET_SYSROOT/environment-setup.d" ]; then
for envfile in $OECORE_TARGET_SYSROOT/environment-setup.d/*.sh; do
. $envfile
done
fi
if [ -d "$OECORE_NATIVE_SYSROOT/environment-setup.d" ]; then
for envfile in $OECORE_NATIVE_SYSROOT/environment-setup.d/*.sh; do
. $envfile
done
fi
and e.g. openssl recipe leverages this functionality:
do_install:append:class-nativesdk () {
mkdir -p ${D}${SDKPATHNATIVE}/environment-setup.d
install -m 644 ${WORKDIR}/environment.d-openssl.sh ${D}${SDKPATHNATIVE}/environment-setup.d/openssl.sh
sed 's|/usr/lib/ssl/|/usr/lib/ssl-3/|g' -i ${D}${SDKPATHNATIVE}/environment-setup.d/openssl.sh
}
So install shell scripts either under SDKPATHNATIVE or SDKPATH depending if the variable is used for all targets (SDKPATHNATIVE) or for a single target (SDKPATH)