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diff --git a/poky/documentation/adt-manual/adt-package.rst b/poky/documentation/adt-manual/adt-package.rst new file mode 100644 index 000000000..787d406e6 --- /dev/null +++ b/poky/documentation/adt-manual/adt-package.rst @@ -0,0 +1,70 @@ +.. SPDX-License-Identifier: CC-BY-2.0-UK + +************************************************************ +Optionally Customizing the Development Packages Installation +************************************************************ + +Because the Yocto Project is suited for embedded Linux development, it +is likely that you will need to customize your development packages +installation. For example, if you are developing a minimal image, then +you might not need certain packages (e.g. graphics support packages). +Thus, you would like to be able to remove those packages from your +target sysroot. + +Package Management Systems +========================== + +The OpenEmbedded build system supports the generation of sysroot files +using three different Package Management Systems (PMS): + +- *OPKG:* A less well known PMS whose use originated in the + OpenEmbedded and OpenWrt embedded Linux projects. This PMS works with + files packaged in an ``.ipk`` format. See + http://en.wikipedia.org/wiki/Opkg for more information about + OPKG. + +- *RPM:* A more widely known PMS intended for GNU/Linux distributions. + This PMS works with files packaged in an ``.rpm`` format. The build + system currently installs through this PMS by default. See + http://en.wikipedia.org/wiki/RPM_Package_Manager for more + information about RPM. + +- *Debian:* The PMS for Debian-based systems is built on many PMS + tools. The lower-level PMS tool ``dpkg`` forms the base of the Debian + PMS. For information on dpkg see + http://en.wikipedia.org/wiki/Dpkg. + +Configuring the PMS +=================== + +Whichever PMS you are using, you need to be sure that the +:term:`PACKAGE_CLASSES` +variable in the ``conf/local.conf`` file is set to reflect that system. +The first value you choose for the variable specifies the package file +format for the root filesystem at sysroot. Additional values specify +additional formats for convenience or testing. See the +``conf/local.conf`` configuration file for details. + +.. note:: + + For build performance information related to the PMS, see the " + package.bbclass + " section in the Yocto Project Reference Manual. + +As an example, consider a scenario where you are using OPKG and you want +to add the ``libglade`` package to the target sysroot. + +First, you should generate the IPK file for the ``libglade`` package and +add it into a working ``opkg`` repository. Use these commands: $ bitbake +libglade $ bitbake package-index + +Next, source the cross-toolchain environment setup script found in the +:term:`Source Directory`. Follow +that by setting up the installation destination to point to your sysroot +as sysroot_dir. Finally, have an OPKG configuration file conf_file that +corresponds to the ``opkg`` repository you have just created. The +following command forms should now work: $ opkg-cl –f conf_file -o +sysroot_dir update $ opkg-cl –f cconf_file -o sysroot_dir \\ +--force-overwrite install libglade $ opkg-cl –f cconf_file -o +sysroot_dir \\ --force-overwrite install libglade-dbg $ opkg-cl –f +conf_file> -osysroot_dir> \\ --force-overwrite install libglade-dev |