package/busybox: minor update, some fixes and comments

- update to 1.18.4
- introduce BB_MAKE_FLAGS, simplifying package/busybox/Makefile a bit
- document how the package/busybox/config may be updated
- document what needs to be done so one may drop 003-defaults.patch
- update package/busybox/config, a few busybox features were not
  selectable

1 files changed, 26 insertions, 0 deletions

diff --git a/package/busybox/config/sysklogd/Config.in b/package/busybox/config/sysklogd/Config.in
index 6bc26d977..fcefc0fe3 100644
--- a/package/busybox/config/sysklogd/Config.in
+++ b/package/busybox/config/sysklogd/Config.in
@@ -50,6 +50,16 @@ config BUSYBOX_FEATURE_SYSLOGD_DUP
 	  Option -D instructs syslogd to drop consecutive messages
 	  which are totally the same.
 
+config BUSYBOX_FEATURE_SYSLOGD_READ_BUFFER_SIZE
+	int "Read buffer size in bytes"
+	default 256
+	range 256 20000
+	depends on BUSYBOX_SYSLOGD
+	help
+	  This option sets the size of the syslog read buffer.
+	  Actual memory usage increases around five times the
+	  change done here.
+
 config BUSYBOX_FEATURE_IPC_SYSLOG
 	bool "Circular Buffer support"
 	default y
@@ -104,6 +114,22 @@ config BUSYBOX_KLOGD
 	  you wish to record the messages produced by the kernel,
 	  you should enable this option.
 
+config BUSYBOX_FEATURE_KLOGD_KLOGCTL
+	bool "Use the klogctl() interface"
+	default y
+	depends on BUSYBOX_KLOGD && BUSYBOX_PLATFORM_LINUX
+	help
+	  The klogd applet supports two interfaces for reading
+	  kernel messages. Linux provides the klogctl() interface
+	  which allows reading messages from the kernel ring buffer
+	  independently from the file system.
+
+	  If you answer 'N' here, klogd will use the more portable
+	  approach of reading them from /proc or a device node.
+	  However, this method requires the file to be available.
+
+	  If in doubt, say 'Y'.
+
 config BUSYBOX_LOGGER
 	bool "logger"
 	default y