Merge pull request #5131 from keszybz/environment-generators

[thirdparty/systemd.git] / DISTRO_PORTING

diff --git a/DISTRO_PORTING b/DISTRO_PORTING
index d8e9ded9437b00c86e76def7abc6dabf3ae15bde..68107e46c96a839df04b095979462b614976baab 100644 (file)
--- a/DISTRO_PORTING
+++ b/DISTRO_PORTING
@@ -14,6 +14,8 @@ HOWTO:
             --with-kbd-loadkeys=
             --with-kbd-setfont=
             --with-tty-gid=
+            --with-ntp-servers=
+            --with-support-url=
 
         2) Try it out. Play around (as an ordinary user) with
         '/usr/lib/systemd/systemd --test --system' for a test run
@@ -21,6 +23,32 @@ HOWTO:
         print the initial transaction it would execute during boot-up.
         This will also inform you about ordering loops and suchlike
 
+NTP POOL:
+
+        By default, timesyncd uses the Google Public NTP servers
+        time[1-4].google.com. They serve time that uses a leap second
+        smear, and can be up to .5s off from servers that use stepped
+        leap seconds.
+
+        https://developers.google.com/time/smear
+
+        If you prefer to use leap second steps, please register your own
+        vendor pool at ntp.org and make it the built-in default by
+        passing --with-ntp-servers= to configure. Registering vendor
+        pools is free:
+
+        http://www.pool.ntp.org/en/vendors.html
+
+PAM:
+        The default PAM config shipped by systemd is really bare bones.
+        It does not include many modules your distro might want to enable
+        to provide a more seamless experience. For example, limits set in
+        /etc/security/limits.conf will not be read unless you load pam_limits.
+        Make sure you add modules your distro expects from user services.
+
+        Pass --with-pamconfdir=no to ./configure to avoid installing this file
+        and instead install your own.
+
 CONTRIBUTING UPSTREAM:
 
         We generally do no longer accept distribution-specific