sha3: code shrink

[oweals/busybox.git] / libbb / Config.src

diff --git a/libbb/Config.src b/libbb/Config.src
index 55367b21bf468a990eec122af1565e85e4e98d13..19021fed13f869d20247c8dfb4df43b60c0c1e7e 100644 (file)
--- a/libbb/Config.src
+++ b/libbb/Config.src
@@ -5,6 +5,8 @@
 
 menu "Busybox Library Tuning"
 
+INSERT
+
 config PASSWORD_MINLEN
        int "Minimum password length"
        default 6
@@ -12,9 +14,9 @@ config PASSWORD_MINLEN
        help
          Minimum allowable password length.
 
-config MD5_SIZE_VS_SPEED
+config MD5_SMALL
        int "MD5: Trade bytes for speed (0:fast, 3:slow)"
-       default 2
+       default 1
        range 0 3
        help
          Trade binary size versus speed for the md5sum algorithm.
@@ -26,9 +28,19 @@ config MD5_SIZE_VS_SPEED
          2                   3.0                5088
          3 (smallest)        5.1                4912
 
+config SHA3_SMALL
+       int "SHA3: Trade bytes for speed (0:fast, 1:slow)"
+       default 1
+       range 0 1
+       help
+         Trade binary size versus speed for the sha3sum algorithm.
+         SHA3_SMALL=0 compared to SHA3_SMALL=1 (approximate):
+         64-bit x86: +270 bytes of code, 45% faster
+         32-bit x86: +450 bytes of code, 75% faster
+
 config FEATURE_FAST_TOP
        bool "Faster /proc scanning code (+100 bytes)"
-       default n
+       default y
        help
          This option makes top (and ps) ~20% faster (or 20% less CPU hungry),
          but code size is slightly bigger.
@@ -41,9 +53,20 @@ config FEATURE_ETC_NETWORKS
          a rarely used feature which allows you to use names
          instead of IP/mask pairs in route command.
 
+config FEATURE_USE_TERMIOS
+       bool "Use termios to manipulate the screen"
+       default y
+       depends on MORE || TOP || POWERTOP
+       help
+         This option allows utilities such as 'more' and 'top' to determine
+         the size of the screen. If you leave this disabled, your utilities
+         that display things on the screen will be especially primitive and
+         will be unable to determine the current screen size, and will be
+         unable to move the cursor.
+
 config FEATURE_EDITING
        bool "Command line editing"
-       default n
+       default y
        help
          Enable line editing (mainly for shell command line).
 
@@ -67,22 +90,38 @@ config FEATURE_EDITING_VI
 
 config FEATURE_EDITING_HISTORY
        int "History size"
-       range 0 99999
-       default 15
+       # Don't allow way too big values here, code uses fixed "char *history[N]" struct member
+       range 0 9999
+       default 255
        depends on FEATURE_EDITING
        help
-         Specify command history size.
+         Specify command history size (0 - disable).
 
 config FEATURE_EDITING_SAVEHISTORY
        bool "History saving"
+       default y
+       depends on FEATURE_EDITING
+       help
+         Enable history saving in shells.
+
+config FEATURE_EDITING_SAVE_ON_EXIT
+       bool "Save history on shell exit, not after every command"
        default n
-       depends on ASH && FEATURE_EDITING
+       depends on FEATURE_EDITING_SAVEHISTORY
        help
-         Enable history saving in ash shell.
+         Save history on shell exit, not after every command.
+
+config FEATURE_REVERSE_SEARCH
+       bool "Reverse history search"
+       default y
+       depends on FEATURE_EDITING_SAVEHISTORY
+       help
+         Enable readline-like Ctrl-R combination for reverse history search.
+         Increases code by about 0.5k.
 
 config FEATURE_TAB_COMPLETION
        bool "Tab completion"
-       default n
+       default y
        depends on FEATURE_EDITING
        help
          Enable tab completion.
@@ -96,7 +135,7 @@ config FEATURE_USERNAME_COMPLETION
 
 config FEATURE_EDITING_FANCY_PROMPT
        bool "Fancy shell prompts"
-       default n
+       default y
        depends on FEATURE_EDITING
        help
          Setting this option allows for prompts to use things like \w and
@@ -122,7 +161,7 @@ config FEATURE_NON_POSIX_CP
          and create a regular file. This does not conform to POSIX,
          but prevents a symlink attack.
          Similarly, "cp file device" will not send file's data
-         to the device.
+         to the device. (To do that, use "cat file >device")
 
 config FEATURE_VERBOSE_CP_MESSAGE
        bool "Give more precise messages when copy fails (cp, mv etc)"
@@ -143,14 +182,34 @@ config FEATURE_COPYBUF_KB
        range 1 1024
        default 4
        help
-         Size of buffer used by cp, mv, install etc.
+         Size of buffer used by cp, mv, install, wget etc.
          Buffers which are 4 kb or less will be allocated on stack.
          Bigger buffers will be allocated with mmap, with fallback to 4 kb
          stack buffer if mmap fails.
 
+config FEATURE_SKIP_ROOTFS
+       bool "Skip rootfs in mount table"
+       default y
+       help
+         Ignore rootfs entry in mount table.
+
+         In Linux, kernel has a special filesystem, rootfs, which is initially
+         mounted on /. It contains initramfs data, if kernel is configured
+         to have one. Usually, another file system is mounted over / early
+         in boot process, and therefore most tools which manipulate
+         mount table, such as df, will skip rootfs entry.
+
+         However, some systems do not mount anything on /.
+         If you need to configure busybox for one of these systems,
+         you may find it useful to turn this option off to make df show
+         initramfs statistics.
+
+         Otherwise, choose Y.
+
 config MONOTONIC_SYSCALL
        bool "Use clock_gettime(CLOCK_MONOTONIC) syscall"
-       default y
+       default n
+       select PLATFORM_LINUX
        help
          Use clock_gettime(CLOCK_MONOTONIC) syscall for measuring
          time intervals (time, ping, traceroute etc need this).