Yocto:检查MACHINE_FEATURES的最终内容

Question

我想知道MACHINE_FEATURES的确切内容。我尝试的第一件事是：

bitbake -e <image> > bitbake.txt

检查文件时，我发现了如下几行：

MACHINE_EXTRA_RDEPENDS=""
#
# $MACHINE_EXTRA_RRECOMMENDS [10 operations]
#   _append /local/STM32MP15-Ecosystem-v1.1.0/Distribution-Package/openstlinux-4.19-thud-mp1-19-10-09/layers/meta-st/meta-st-stm32mp/conf/machine/include/st-machine-features-stm32mp.inc:54
#     "     ${GPU_IMAGE_INSTALL}          ${OPTEE_IMAGE_INSTALL}        ${ALSA_ADDONS_INSTALL}        ${BLUETOOTH_IMAGE_INSTALL}    "
#   set /local/STM32MP15-Ecosystem-v1.1.0/Distribution-Package/openstlinux-4.19-thud-mp1-19-10-09/layers/meta-st/meta-st-stm32mp/conf/machine/include/st-machine-common-stm32mp.inc:38
#     " kernel-modules"
#   _append /local/STM32MP15-Ecosystem-v1.1.0/Distribution-Package/openstlinux-4.19-thud-mp1-19-10-09/layers/meta-st/meta-st-stm32mp/conf/machine/include/st-machine-common-stm32mp.inc:52
#     " ${@bb.utils.contains('MACHINE_FEATURES', 'wifi', 'linux-firmware-bcm43430', '', d)} "
#   _append /local/STM32MP15-Ecosystem-v1.1.0/Distribution-Package/openstlinux-4.19-thud-mp1-19-10-09/layers/meta-st/meta-st-stm32mp/conf/machine/include/st-machine-common-stm32mp.inc:53
#     " ${@bb.utils.contains('DISTRO_FEATURES','systemd',' wifi-suspend ','',d)} "

#字符表示它们是注释？我的意思是，wifi特性实际上是添加到MACHINE_FEATURES中的

如何打印出这样一个变量的内容？

Answer 1

就像bitbake -e <image> | grep "^MACHINE_FEATURES"一样。注释掉的行只保存发生时的求值。对于最终结果，唯一重要的是在开头声明MACHINE_FEATURES =的那行代码。