embedded - 如何在 Yocto build 中添加第三方库作为包

Question

我有一个不太出名的库，而且这个库没有可用的包 https://github.com/dailab/libsml通常我通过执行 make install 在我的设备上安装这个库
如何将此库作为包添加到我的 Linux 发行版中。就像我可以添加 python或我 local.conf 中的任何其他食谱

我的 local.conf 看起来像这样

MACHINE ?= "phyboard-regor-am335x-1"

DISTRO ?= "yogurt"

# The following line disables the autostart of the phytec-qtdemo by
# default, but you can start the demo anytime using
#  $ systemctl start phytec-qtdemo.service
#SYSTEMD_AUTO_ENABLE_pn-phytec-qtdemo = "disable"

# That are the default values of bitbake.  Adapt these to your workspace and
# host preferences.
#DL_DIR = "${TOPDIR}/downloads"
#SSTATE_DIR = "${TOPDIR}/sstate-cache"

# License Handling
#  - Uncomment for i.MX6 proprietary GPU libraries
#LICENSE_FLAGS_WHITELIST += "license-nxp_v14-june-2016_imx-gpu-viv"
#  - Uncomment for Freescale i.MX6 legacy VPU firmware blobs
#LICENSE_FLAGS_WHITELIST += "license-freescale_v6-february-2015_firmware-imx"

# You can disable and enable FSTYPES as you wish. e.g. 'ext4'.
# This is ordering dependend. IMAGE_FSTYPES += "tar.gz" IMAGE_FSTYPES_append_mx6 = " sdcard ubifs" IMAGE_FSTYPES_append_ti33x
= " sdcard ubifs" IMAGE_FSTYPES_append_rk3288 = " sdcard"
#IMAGE_FSTYPES_append_ti33x = " emmc" DEPLOY_DIR = "${TOPDIR}/deploy"

# Select configuration UI for linux and barebox recipe. The openembedded
# default is 'menuconfig', 'nconfig' has more features.
#KCONFIG_CONFIG_COMMAND = "menuconfig" KCONFIG_CONFIG_COMMAND = "nconfig"

# Turn on debugging options of the kernel
# This is currently only supported for the TI kernel v4.4 DEBUG_BUILD_pn-linux-ti = "1"

# The default package class of the distro yogurt is 'package_ipk'. The first
# value is used as the package manager to build the image and sdk. To build
# also tar packages use
#PACKAGE_CLASSES = "package_ipk package_tar"

# Variable IMAGE_ROOTFS_EXTRA_SPACE from poky/meta/conf/documentation.conf:
#   Defines additional free disk space created in the image in Kbytes. By
#   default, this variable is set to '0'.
# This example line adds an additional 512 MiB of free space to the root
# filesystem:
#IMAGE_ROOTFS_EXTRA_SPACE = "524288"

# See http://www.yoctoproject.org/docs/1.8/ref-manual/ref-manual.html#ref-features-image
#   "Through these variables, you can add several different predefined
#    packages such as development utilities or packages with debug information
#    needed to investigate application problems or profile applications EXTRA_IMAGE_FEATURES = ""
# - "Makes an image suitable for development (e.g. allows root logins without
#    passwords and enables post-installation logging)" EXTRA_IMAGE_FEATURES += "debug-tweaks"
# - "Installs debug symbol packages for all packages installed in a given
#    image."
#EXTRA_IMAGE_FEATURES += "dbg-pkgs"
# - "Installs debugging tools such as strace and gdb."
#EXTRA_IMAGE_FEATURES += "tools-debug"
#python-netserver for python cgi IMAGE_INSTALL_append = "mc nano openvpn apache2 dhcp-server lora-gateway lora-pkt-fwd spitools python avro-c python-kafka ntp python-netserver iptables"

#SDKMACHINE ?= "x86_64"

OE_TERMINAL = "auto" PATCHRESOLVE = "noop" BB_DISKMON_DIRS = "\
    STOPTASKS,${TMPDIR},1G,100K \
    STOPTASKS,${DL_DIR},1G,100K \
    STOPTASKS,${SSTATE_DIR},1G,100K \
    ABORT,${TMPDIR},100M,1K \
    ABORT,${DL_DIR},100M,1K \
    ABORT,${SSTATE_DIR},100M,1K"

CONF_VERSION = "1"

我的 bblayers.conf 看起来像这样:

# POKY_BBLAYERS_CONF_VERSION is increased each time build/conf/bblayers.conf
# changes incompatibly
POKY_BBLAYERS_CONF_VERSION = "2"

BBPATH = "${TOPDIR}"
BBFILES ?= ""

OEROOT := "/home/enilyser/sources/poky"
BBLAYERS  ?= " \
  ${OEROOT}/meta \
  ${OEROOT}/meta-poky \
  ${OEROOT}/../meta-phytec \
  ${OEROOT}/../meta-yogurt \
  ${OEROOT}/../meta-cloud-services-master/meta-openstack \
  ${OEROOT}/../meta-openembedded/meta-oe \
  ${OEROOT}/../meta-openembedded/meta-networking \
  ${OEROOT}/../meta-openembedded/meta-python \
  ${OEROOT}/../meta-openembedded/meta-multimedia \
  ${OEROOT}/../meta-qt5 \
  ${OEROOT}/../meta-openembedded/meta-ruby \
  ${OEROOT}/../meta-openembedded/meta-webserver \
  ${OEROOT}/../meta-lora-net-master \
  ${OEROOT}/../meta-lorawan-master \
  "

Answer 1

如果您不是 2.4+ 版本的 yocto 版本，您可以使用 devtool 添加配方

devtool add libsml https://github.com/dailab/libsml

它将创建一个食谱模板

workspace/recipes/libsml/libsml_git.bb

这几乎是您所需要的，但有时您必须稍微调整一下以确保交叉编译。

在这种情况下，它构建并运行测试，显然在交叉构建时我们可以构建测试，但我们可以在构建机器上运行它们，所以你必须禁用它。你可以在配方中或通过补丁来做到这一点。例如通过配方，您将 do_configure 函数更改为这样的

do_configure () {
    # Specify any needed configure commands here
    sed -i -e "s#@./test##g" ${S}/test/Makefile
}

也可以更改 do_install 以便它可以在目标上安装您需要的文件

do_install () {
    install -d ${D}${libdir} ${D}${includedir}
    install -m 0644 ${B}/sml/lib/libsml.* ${D}${libdir}
    rm -rf ${D}${libdir}/libsml.o
    cp -R --no-dereference --preserve=mode,links ${S}/sml/include/* ${D}${includedir}
    install -D -m 0644 sml.pc ${D}${libdir}/pkgconfig/sml.pc
}

构建并查看是否一切正常

devtool build libsml

如果所有构建都可以，那么您可以将配方应用于您选择的层(例如 meta-oe )

devtool finish libsml meta-oe -f

就是这样，现在你应该在 meta-oe 层看到配方，你可以尝试构建它

bitbake libsml