diff options
Diffstat (limited to 'poky/documentation/ref-manual/features.rst')
| -rw-r--r-- | poky/documentation/ref-manual/features.rst | 74 |
1 files changed, 71 insertions, 3 deletions
diff --git a/poky/documentation/ref-manual/features.rst b/poky/documentation/ref-manual/features.rst index 5e853caa2c..a5b01e8df7 100644 --- a/poky/documentation/ref-manual/features.rst +++ b/poky/documentation/ref-manual/features.rst @@ -72,6 +72,8 @@ Project metadata: - *phone:* Mobile phone (voice) support +- *qemu-usermode:* QEMU can support user-mode emulation for this machine + - *qvga:* Machine has a QVGA (320x240) display - *rtc:* Machine has a Real-Time Clock @@ -112,6 +114,13 @@ configuration level. See the :term:`COMBINED_FEATURES` variable for more information. +.. note:: + + :term:`DISTRO_FEATURES` is normally independent of kernel configuration, + so if a feature specified in :term:`DISTRO_FEATURES` also relies on + support in the kernel, you will also need to ensure that support is + enabled in the kernel configuration. + This list only represents features as shipped with the Yocto Project metadata, as extra layers can define their own: @@ -143,6 +152,9 @@ metadata, as extra layers can define their own: - *ext2:* Include tools for supporting for devices with internal HDD/Microdrive for storing files (instead of Flash only devices). +- *gobject-introspection-data:* Include data to support + `GObject Introspection <https://gi.readthedocs.io/en/latest/>`__. + - *ipsec:* Include IPSec support. - *ipv4:* Include IPv4 support. @@ -152,29 +164,41 @@ metadata, as extra layers can define their own: - *keyboard:* Include keyboard support (e.g. keymaps will be loaded during boot). -- *largefile:* Enable building applications with - `argefile support <https://en.wikipedia.org/wiki/Large-file_support>`__. - - *multiarch:* Enable building applications with multiple architecture support. +- *ld-is-gold:* Use the `gold <https://en.wikipedia.org/wiki/Gold_(linker)>`__ + linker instead of the standard GCC linker (bfd). + - *ldconfig:* Include support for ldconfig and ``ld.so.conf`` on the target. +- *lto:* Enable `Link-Time Optimisation <https://gcc.gnu.org/wiki/LinkTimeOptimization>`__. + - *nfc:* Include support for `Near Field Communication <https://en.wikipedia.org/wiki/Near-field_communication>`__. - *nfs:* Include NFS client support (for mounting NFS exports on device). +- *nls:* Include National Language Support (NLS). + - *opengl:* Include the Open Graphics Library, which is a cross-language, multi-platform application programming interface used for rendering two and three-dimensional graphics. +- *overlayfs:* Include `OverlayFS <https://docs.kernel.org/filesystems/overlayfs.html>`__ + support. + +- *pam:* Include `Pluggable Authentication Module (PAM) <https://en.wikipedia.org/wiki/Pluggable_authentication_module>`__ + support. + - *pci:* Include PCI bus support. - *pcmcia:* Include PCMCIA/CompactFlash support. +- *polkit:* Include `Polkit <https://en.wikipedia.org/wiki/Polkit>`__ support. + - *ppp:* Include PPP dialup support. - *ptest:* Enables building the package tests where supported by @@ -182,6 +206,13 @@ metadata, as extra layers can define their own: ":ref:`dev-manual/common-tasks:testing packages with ptest`" section in the Yocto Project Development Tasks Manual. +- *pulseaudio:* Include support for + `PulseAudio <https://www.freedesktop.org/wiki/Software/PulseAudio/>`__. + +- *selinux:* Include support for + `Security-Enhanced Linux (SELinux) <https://en.wikipedia.org/wiki/Security-Enhanced_Linux>`__ + (requires `meta-selinux <https://layers.openembedded.org/layerindex/layer/meta-selinux/>`__). + - *seccomp:* Enables building applications with `seccomp <https://en.wikipedia.org/wiki/Seccomp>`__ support, to allow them to strictly restrict the system calls that they are allowed @@ -273,6 +304,9 @@ Here are the image features available for all images: just disables the mechanism which forces an non-empty password for the root user. +- *lic-pkgs:* Installs license packages for all packages installed in a + given image. + - *overlayfs-etc:* Configures the ``/etc`` directory to be in ``overlayfs``. This allows to store device specific information elsewhere, especially if the root filesystem is configured to be read-only. @@ -297,6 +331,18 @@ Here are the image features available for all images: section in the Yocto Project Development Tasks Manual for more information. +- *read-only-rootfs-delayed-postinsts:* when specified in conjunction + with ``read-only-rootfs``, specifies that post-install scripts are + still permitted (this assumes that the root filesystem will be made + writeable for the first boot; this feature does not do anything to + ensure that - it just disables the check for post-install scripts.) + +- *serial-autologin-root:* when specified in conjunction with + ``empty-root-password`` will automatically login as root on the + serial console. This of course opens up a security hole if the + serial console is potentially accessible to an attacker, so use + with caution. + - *splash:* Enables showing a splash screen during boot. By default, this screen is provided by ``psplash``, which does allow customization. If you prefer to use an alternative splash screen @@ -304,6 +350,11 @@ Here are the image features available for all images: different package name (or names) within the image recipe or at the distro configuration level. +- *stateless-rootfs:*: specifies that the image should be created as + stateless - when using ``systemd``, ``systemctl-native`` will not + be run on the image, leaving the image for population at runtime by + systemd. + - *staticdev-pkgs:* Installs static development packages, which are static libraries (i.e. ``*.a`` files), for all packages installed in a given image. @@ -322,6 +373,21 @@ these valid features is as follows: - *ssh-server-dropbear:* Installs the Dropbear minimal SSH server. + .. note:: + + As of the 4.1 release, the ``ssh-server-dropbear`` feature also + recommends the ``openssh-sftp-server`` package, which by default + will be pulled into the image. This is because recent versions of + the OpenSSH ``scp`` client now use the SFTP protocol, and thus + require an SFTP server to be present to connect to. However, if + you wish to use the Dropbear ssh server `without` the SFTP server + installed, you can either remove ``ssh-server-dropbear`` from + ``IMAGE_FEATURES`` and add ``dropbear`` to :term:`IMAGE_INSTALL` + instead, or alternatively still use the feature but set + :term:`BAD_RECOMMENDATIONS` as follows:: + + BAD_RECOMMENDATIONS += "openssh-sftp-server" + - *ssh-server-openssh:* Installs the OpenSSH SSH server, which is more full-featured than Dropbear. Note that if both the OpenSSH SSH server and the Dropbear minimal SSH server are present in @@ -339,6 +405,8 @@ these valid features is as follows: - *tools-testapps:* Installs device testing tools (e.g. touchscreen debugging). +- *weston:* Installs Weston (reference Wayland environment). + - *x11:* Installs the X server. - *x11-base:* Installs the X server with a minimal environment. |