一些变量

以TI的 linux-ti-staging 为例子，说明一些变量的基本含义.

D：表示编译生成镜像的目录，该目录下的产物，可用于共享给其他配方

bitbake linux-ti-staging -e | grep ^D
D="/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/build/arago-tmp-default-glibc/work/am62xx_evm-oe-linux/linux-ti-staging/6.6.32+git/image"

S：表示解压后（包括打补丁后）的源码目录

bitbake linux-ti-staging -e | grep ^S
S="/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/build/arago-tmp-default-glibc/work/am62xx_evm-oe-linux/linux-ti-staging/6.6.32+git/git"

TMPDIR：bitbake编译过程中的tmp目录

bitbake linux-ti-staging -e | grep ^TMPDIR
TMPDIR="/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/build/arago-tmp-default-glibc"

PACKAGE_ARCH：包的架构名

bitbake linux-ti-staging -e | grep ^PACKAGE_ARCH
PACKAGE_ARCH="am62xx_evm"
PACKAGE_ARCHS="all any noarch aarch64 am62xx_evm"

TARGET_OS：目标操作系统类型

bitbake linux-ti-staging -e | grep ^TARGET_OS
TARGET_OS="linux"

PN：构建包的配方名

bitbake linux-ti-staging -e | grep ^PN
PN="linux-ti-staging"

PV：配方版本

bitbake linux-ti-staging -e | grep ^PV
PV="6.6.32+git"

PR：配方的修订版本

bitbake linux-ti-staging -e | grep ^PR
PR="r0_tisdk_5_edgeai_0_edgeai_8"

BP：PN+PV

bitbake linux-ti-staging -e | grep ^BP
BP="linux-ti-staging-6.6.32+git"
BPN="linux-ti-staging"

WORKDIR：软件包编译的工作目录

bitbake linux-ti-staging -e | grep ^WORKDIR
WORKDIR="/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/build/arago-tmp-default-glibc/work/am62xx_evm-oe-linux/linux-ti-staging/6.6.32+git"
WORKDIR_PKGDATA="/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/build/arago-tmp-default-glibc/work/am62xx_evm-oe-linux/linux-ti-staging/6.6.32+git/pkgdata-sysroot"

 DL_DIR：软件包下载存放目录

bitbake linux-ti-staging -e | grep ^DL_DIR
DL_DIR="/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/build/../downloads"

THISDIR：bb文件所在目录

bitbake linux-ti-staging -e | grep ^THISDIR
THISDIR="/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux"

SRC_URI：源文件列表

bitbake linux-ti-staging -e | grep ^SRC_URI
SRC_URI=" git://git.ti.com/git/ti-linux-kernel/ti-linux-kernel.git;protocol=https;branch=ti-linux-6.6.y             file://defconfig      file://0001-lib-build_OID_registry-fix-reproducibility-issues.patch     file://0001-vt-conmakehash-improve-reproducibility.patch     file://0001-pnmtologo-use-relocatable-file-name.patch       file://0001-remoteproc-k3-dsp-assert-reset-in-probe.patch "

FILESPATH：本地文件目录集合，bitbake查找SRC_URI的 file:// 时会去FILESPATH指定的目录去查找file。FILESPATH的默认值在base.bbclass中定义，使用FILESEXTRAPATHS扩展FILESPATH

bitbake linux-ti-staging -e | grep ^FILESPATH
FILESPATH="/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/arago:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/arago:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/arago:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/arago:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6/arago:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6.32+git/arago:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging/arago:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/files/arago:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/am62xx-evm:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/am62xx-evm:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6/am62xx-evm:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6.32+git/am62xx-evm:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging/am62xx-evm:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/files/am62xx-evm:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/am62xx:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/am62xx:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6/am62xx:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6.32+git/am62xx:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging/am62xx:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/files/am62xx:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/k3:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/k3:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/k3:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/k3:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6/k3:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6.32+git/k3:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging/k3:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/files/k3:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/ti-soc:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/ti-soc:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/ti-soc:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/ti-soc:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6/ti-soc:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6.32+git/ti-soc:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging/ti-soc:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/files/ti-soc:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6.32+git/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/files/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/bsp-ti-6_6:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/bsp-ti-6_6:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/bsp-ti-6_6:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/bsp-ti-6_6:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6/bsp-ti-6_6:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6.32+git/bsp-ti-6_6:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging/bsp-ti-6_6:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/files/bsp-ti-6_6:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6.32+git/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/files/aarch64:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm/:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6/:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6.32+git/:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging/:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/files/"

FILESEXTRAPATHS：扩展FILESPATH

bitbake linux-ti-staging -e | grep ^FILESEXTRAPATHS
FILESEXTRAPATHS="/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-edgeai/recipes-kernel/linux/linux-ti-staging/am62xx-evm:/home/likw/ex1/ti-tisdk-yocto/tisdk/tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-6.6:__default:"