package/systemd: Update description and kernel options

realign the configuration to the README.

enable CONFIG_AUTOFS_FS (kernel >= 4.18) as well as the someday
to be removed CONFIG_AUTOFS4_FS option.

Signed-off-by: Norbert Lange <nolange79@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/systemd/Config.in

@@ -22,7 +22,7 @@ menuconfig BR2_PACKAGE_SYSTEMD
 	depends on !BR2_STATIC_LIBS # kmod
 	depends on BR2_TOOLCHAIN_USES_GLIBC
 	depends on BR2_TOOLCHAIN_HAS_SSP
-	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_5
 	depends on BR2_HOST_GCC_AT_LEAST_5 # host-systemd
 	select BR2_PACKAGE_HAS_UDEV
@@ -51,13 +51,25 @@ menuconfig BR2_PACKAGE_SYSTEMD
 	  an elaborate transactional dependency-based service control
 	  logic.  It can work as a drop-in replacement for sysvinit.
 
-	  Systemd requires a Linux kernel >= 3.0 with the following
+	  Systemd requires a Linux kernel >= 3.13 with the following
 	  options enabled:
 
-	  - CONFIG_CGROUPS
+	  - CONFIG_DEVTMPFS
+	  - CONFIG_CGROUPS (it is OK to disable all controllers)
 	  - CONFIG_INOTIFY_USER
-	  - CONFIG_FHANDLE
-	  - CONFIG_AUTOFS4_FS
+	  - CONFIG_SIGNALFD
+	  - CONFIG_TIMERFD
+	  - CONFIG_EPOLL
+	  - CONFIG_UNIX (it requires CONFIG_NET, but every other flag in
+	    it is not necessary)
+	  - CONFIG_SYSFS
+	  - CONFIG_PROC_FS
+	  - CONFIG_FHANDLE (libudev, mount and bind mount handling)
+
+	  - CONFIG_NET_NS (needed by PrivateNetwork=, used in some
+	    systemd units)
+
+	  - CONFIG_AUTOFS_FS / CONFIG_AUTOFS4_FS
 	  - CONFIG_TMPFS_POSIX_ACL
 	  - CONFIG_TMPFS_XATTR
 

package/systemd/systemd.mk

@@ -725,14 +725,22 @@ SYSTEMD_CONF_ENV = $(HOST_UTF8_LOCALE_ENV)
 SYSTEMD_NINJA_ENV = $(HOST_UTF8_LOCALE_ENV)
 
 define SYSTEMD_LINUX_CONFIG_FIXUPS
+	$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS)
 	$(call KCONFIG_ENABLE_OPT,CONFIG_CGROUPS)
-	$(call KCONFIG_ENABLE_OPT,CONFIG_FHANDLE)
-	$(call KCONFIG_ENABLE_OPT,CONFIG_EPOLL)
+	$(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER)
 	$(call KCONFIG_ENABLE_OPT,CONFIG_SIGNALFD)
 	$(call KCONFIG_ENABLE_OPT,CONFIG_TIMERFD)
-	$(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER)
-	$(call KCONFIG_ENABLE_OPT,CONFIG_PROC_FS)
+	$(call KCONFIG_ENABLE_OPT,CONFIG_EPOLL)
+	$(call KCONFIG_ENABLE_OPT,CONFIG_UNIX)
 	$(call KCONFIG_ENABLE_OPT,CONFIG_SYSFS)
+	$(call KCONFIG_ENABLE_OPT,CONFIG_PROC_FS)
+	$(call KCONFIG_ENABLE_OPT,CONFIG_FHANDLE)
+
+	$(call KCONFIG_ENABLE_OPT,CONFIG_NET_NS)
+
+	$(call KCONFIG_DISABLE_OPT,CONFIG_SYSFS_DEPRECATED)
+
+	$(call KCONFIG_ENABLE_OPT,CONFIG_AUTOFS_FS)
 	$(call KCONFIG_ENABLE_OPT,CONFIG_AUTOFS4_FS)
 	$(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_ACL)
 	$(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_XATTR)