busybox/libbb/Config.in
Denis Vlasenko 459be35234 hwclock: size optimizations
libbb/time.c: new file, introducing monotonic_us()
pscan, traceroute, arping: use it instead of gettimeofday
ping, zcip: TODO

function                                             old     new   delta
monotonic_us                                           -      89     +89
find_pair                                            164     180     +16
.rodata                                           129747  129763     +16
refresh                                             1144    1152      +8
............
timeout                                                8       4      -4
static.start                                           8       4      -4
last                                                   8       4      -4
parse_conf                                          1303    1284     -19
time_main                                           1149    1124     -25
gettimeofday_us                                       39       -     -39
arping_main                                         2042    1969     -73
hwclock_main                                         594     501     -93
catcher                                              485     380    -105
traceroute_main                                     4300    4117    -183
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 8/11 up/down: 157/-562)        Total: -405 bytes
2007-06-17 19:09:05 +00:00

109 lines
2.7 KiB
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#
# For a description of the syntax of this configuration file,
# see scripts/kbuild/config-language.txt.
#
menu "Busybox Library Tuning"
config PASSWORD_MINLEN
int "Minimum password length"
default 6
range 5 32
help
Minimum allowable password length.
config MD5_SIZE_VS_SPEED
int " MD5: Trade Bytes for Speed"
default 2
range 0 3
help
Trade binary size versus speed for the md5sum algorithm.
Approximate values running uClibc and hashing
linux-2.4.4.tar.bz2 were:
user times (sec) text size (386)
0 (fastest) 1.1 6144
1 1.4 5392
2 3.0 5088
3 (smallest) 5.1 4912
config FEATURE_EDITING
bool "Command line editing"
default n
help
Enable line editing (mainly for shell command line).
config FEATURE_EDITING_MAX_LEN
int "Maximum length of input"
range 128 8192
default 1024
depends on FEATURE_EDITING
help
Line editing code uses on-stack buffers for storage.
You may want to decrease this parameter if your target machine
benefits from smaller stack usage.
config FEATURE_EDITING_FANCY_KEYS
bool "Additional editing keys"
default n
depends on FEATURE_EDITING
help
Enable additonal editing keys (Ctrl-E, Ctrl-U etc).
Arrow keys, Home/End/Delete and Ctrl-W work even without this option.
config FEATURE_EDITING_VI
bool "vi-style line editing commands"
default n
depends on FEATURE_EDITING
help
Enable vi-style line editing. In shells, this mode can be
turned on and off with "set -o vi" and "set +o vi".
config FEATURE_EDITING_HISTORY
int "History size"
range 0 99999
default 15
depends on FEATURE_EDITING
help
Specify command history size.
config FEATURE_EDITING_SAVEHISTORY
bool "History saving"
default n
depends on ASH && FEATURE_EDITING
help
Enable history saving in ash shell.
config FEATURE_TAB_COMPLETION
bool "Tab completion"
default n
depends on FEATURE_EDITING
help
Enable tab completion.
config FEATURE_USERNAME_COMPLETION
bool "Username completion"
default n
depends on FEATURE_TAB_COMPLETION
help
Enable username completion.
config FEATURE_EDITING_FANCY_PROMPT
bool "Fancy shell prompts"
default n
depends on FEATURE_EDITING
help
Setting this option allows for prompts to use things like \w and
\$ and escape codes.
config MONOTONIC_SYSCALL
bool "Use clock_gettime(CLOCK_MONOTONIC) syscall"
default y
help
Use clock_gettime(CLOCK_MONOTONIC) syscall for measuring
time intervals (time, ping, traceroute etc need this).
Probably requires Linux 2.6+. If not selected, gettimeofday
will be used instead (which gives wrong results if date/time
is reset).
endmenu