ll_types.c: optimize link type table, make it conditional

            on FEATURE_IP_RARE_PROTOCOLS

function                                             old     new   delta
static.arphrd_name                                     -     373    +373
static.arphrd_type                                     -     124    +124
ll_type_n2a                                           58      78     +20
static.arphrd_names                                  496       -    -496
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 1/0 up/down: 517/-496)           Total: 21 bytes
   text    data     bss     dec     hex filename
 776880     974    9420  787274   c034a busybox_old
 776594     974    9420  786988   c022c busybox_unstripped

1 files changed, 10 insertions, 0 deletions

diff --git a/networking/Config.in b/networking/Config.in
index bd6c6ef7a..7dbad30b3 100644
--- a/networking/Config.in
+++ b/networking/Config.in
@@ -463,6 +463,16 @@ config FEATURE_IP_SHORT_FORMS
           Say N unless you desparately need the short form of the ip
           object commands.
 
+config FEATURE_IP_RARE_PROTOCOLS
+        bool "Suport display of rarely-used link types."
+        default n
+        depends on IP
+        help
+          If you are not going to use links of type "frad", "econet",
+          "bif" etc, you probably don't need to enable this.
+          Ethernet, wireless, infrared, ppp/slip, ip tunnelling
+          link types are supported without this option selected.
+
 config IPADDR
         bool
         default y