Merge pull request #13905 from poettering/cpuset-fixes

[thirdparty/systemd.git] / docs / DISTRO_PORTING.md

diff --git a/docs/DISTRO_PORTING.md b/docs/DISTRO_PORTING.md
index 0099a1334aed6473231a5abf087f1a173aa03374..d14bf131ba7735e27deeb3611b808c6b8693d698 100644 (file)
--- a/docs/DISTRO_PORTING.md
+++ b/docs/DISTRO_PORTING.md
@@ -15,7 +15,6 @@ distribution:
    * `-Dsysvinit-path=`
    * `-Dsysvrcnd-path=`
    * `-Drc-local=`
-   * `-Dhalt-local=`
    * `-Dloadkeys-path=`
    * `-Dsetfont-path=`
    * `-Dtty-gid=`
@@ -31,6 +30,20 @@ distribution:
    print the initial transaction it would execute during boot-up.
    This will also inform you about ordering loops and suchlike.
 
+## Compilation options
+
+The default configuration does not enable any optimization or hardening
+options. This is suitable for development and testing, but not for end-user
+installations.
+
+For deployment, optimization (`-O2` or `-O3` compiler options), link time
+optimization (`-Db_lto=true` meson option), and hardening (e.g.
+`-D_FORTIFY_SOURCE=2`, `-fstack-protector-strong`, `-fstack-clash-protection`,
+`-fcf-protection`, `-pie` compiler options, and `-z relro`, `-z now`,
+`--as-needed` linker options) are recommended. The most appropriate set of
+options depends on the architecture and distribution specifics so no default is
+provided.
+
 ## NTP Pool
 
 By default, systemd-timesyncd uses the Google Public NTP servers