- except src/basic/siphash24.c which is CC0 Public Domain
- except src/journal/lookup3.c which is Public Domain
- except src/udev/* which is (currently still) GPLv2, GPLv2+
+ - except tools/chromiumos/* which is BSD-style
REQUIREMENTS:
Linux kernel >= 3.13
Linux kernel >= 4.2 for unified cgroup hierarchy support
+ Linux kernel >= 5.4 for signed Verity images support
Kernel Config Options:
CONFIG_DEVTMPFS
CONFIG_EFIVAR_FS
CONFIG_EFI_PARTITION
+ Required for signed Verity images support:
+ CONFIG_DM_VERITY_VERIFY_ROOTHASH_SIG
+
We recommend to turn off Real-Time group scheduling in the
kernel when using systemd. RT group scheduling effectively
makes RT scheduling unavailable for most userspace, since it
libblkid >= 2.24 (from util-linux) (optional)
libkmod >= 15 (optional)
PAM >= 1.1.2 (optional)
- libcryptsetup (optional)
+ libcryptsetup (optional), >= 2.3.0 required for signed Verity images support
libaudit (optional)
libacl (optional)
libselinux (optional)
liblzma (optional)
liblz4 >= 1.3.0 / 130 (optional)
+ libzstd >= 1.4.0 (optional)
libgcrypt (optional)
libqrencode (optional)
libmicrohttpd (optional)
libpython (optional)
libidn2 or libidn (optional)
- gnutls >= 3.1.4 (optional, >= 3.5.3 is required to support DNS-over-TLS with gnutls)
+ gnutls >= 3.1.4 (optional, >= 3.6.0 is required to support DNS-over-TLS with gnutls)
openssl >= 1.1.0 (optional, required to support DNS-over-TLS with openssl)
elfutils >= 158 (optional)
polkit (optional)
dependencies:
util-linux >= v2.27.1 required
- dbus >= 1.11.0 (strictly speaking optional, but recommended)
+ dbus >= 1.4.0 (strictly speaking optional, but recommended)
+ NOTE: If using dbus < 1.9.18, you should override the default
+ policy directory (--with-dbuspolicydir=/etc/dbus-1/system.d).
dracut (optional)
polkit (optional)