| 1 | # |
| 2 | # For a description of the syntax of this configuration file, |
| 3 | # see scripts/kbuild/config-language.txt. |
| 4 | # |
| 5 | |
| 6 | |
| 7 | config BUSYBOX_CONFIG_HAVE_DOT_CONFIG |
| 8 | bool |
| 9 | default y |
| 10 | |
| 11 | menu "Busybox Settings" |
| 12 | |
| 13 | menu "General Configuration" |
| 14 | |
| 15 | config BUSYBOX_CONFIG_DESKTOP |
| 16 | bool "Enable options for full-blown desktop systems" |
| 17 | default n |
| 18 | help |
| 19 | Enable options and features which are not essential. |
| 20 | Select this only if you plan to use busybox on full-blown |
| 21 | desktop machine with common Linux distro, not on an embedded box. |
| 22 | |
| 23 | config BUSYBOX_CONFIG_EXTRA_COMPAT |
| 24 | bool "Provide compatible behavior for rare corner cases (bigger code)" |
| 25 | default n |
| 26 | help |
| 27 | This option makes grep, sed etc handle rare corner cases |
| 28 | (embedded NUL bytes and such). This makes code bigger and uses |
| 29 | some GNU extensions in libc. You probably only need this option |
| 30 | if you plan to run busybox on desktop. |
| 31 | |
| 32 | config BUSYBOX_CONFIG_INCLUDE_SUSv2 |
| 33 | bool "Enable obsolete features removed before SUSv3" |
| 34 | default y |
| 35 | help |
| 36 | This option will enable backwards compatibility with SuSv2, |
| 37 | specifically, old-style numeric options ('command -1 <file>') |
| 38 | will be supported in head, tail, and fold. (Note: should |
| 39 | affect renice too.) |
| 40 | |
| 41 | config BUSYBOX_CONFIG_USE_PORTABLE_CODE |
| 42 | bool "Avoid using GCC-specific code constructs" |
| 43 | default n |
| 44 | help |
| 45 | Use this option if you are trying to compile busybox with |
| 46 | compiler other than gcc. |
| 47 | If you do use gcc, this option may needlessly increase code size. |
| 48 | |
| 49 | config BUSYBOX_CONFIG_PLATFORM_LINUX |
| 50 | bool "Enable Linux-specific applets and features" |
| 51 | default y |
| 52 | help |
| 53 | For the most part, busybox requires only POSIX compatibility |
| 54 | from the target system, but some applets and features use |
| 55 | Linux-specific interfaces. |
| 56 | |
| 57 | Answering 'N' here will disable such applets and hide the |
| 58 | corresponding configuration options. |
| 59 | |
| 60 | choice |
| 61 | prompt "Buffer allocation policy" |
| 62 | default BUSYBOX_CONFIG_FEATURE_BUFFERS_GO_ON_STACK |
| 63 | help |
| 64 | There are 3 ways BusyBox can handle buffer allocations: |
| 65 | - Use malloc. This costs code size for the call to xmalloc. |
| 66 | - Put them on stack. For some very small machines with limited stack |
| 67 | space, this can be deadly. For most folks, this works just fine. |
| 68 | - Put them in BSS. This works beautifully for computers with a real |
| 69 | MMU (and OS support), but wastes runtime RAM for uCLinux. This |
| 70 | behavior was the only one available for BusyBox versions 0.48 and |
| 71 | earlier. |
| 72 | |
| 73 | config BUSYBOX_CONFIG_FEATURE_BUFFERS_USE_MALLOC |
| 74 | bool "Allocate with Malloc" |
| 75 | |
| 76 | config BUSYBOX_CONFIG_FEATURE_BUFFERS_GO_ON_STACK |
| 77 | bool "Allocate on the Stack" |
| 78 | |
| 79 | config BUSYBOX_CONFIG_FEATURE_BUFFERS_GO_IN_BSS |
| 80 | bool "Allocate in the .bss section" |
| 81 | |
| 82 | endchoice |
| 83 | |
| 84 | config BUSYBOX_CONFIG_SHOW_USAGE |
| 85 | bool "Show terse applet usage messages" |
| 86 | default y |
| 87 | help |
| 88 | All BusyBox applets will show help messages when invoked with |
| 89 | wrong arguments. You can turn off printing these terse usage |
| 90 | messages if you say no here. |
| 91 | This will save you up to 7k. |
| 92 | |
| 93 | config BUSYBOX_CONFIG_FEATURE_VERBOSE_USAGE |
| 94 | bool "Show verbose applet usage messages" |
| 95 | default y |
| 96 | depends on BUSYBOX_CONFIG_SHOW_USAGE |
| 97 | help |
| 98 | All BusyBox applets will show more verbose help messages when |
| 99 | busybox is invoked with --help. This will add a lot of text to the |
| 100 | busybox binary. In the default configuration, this will add about |
| 101 | 13k, but it can add much more depending on your configuration. |
| 102 | |
| 103 | config BUSYBOX_CONFIG_FEATURE_COMPRESS_USAGE |
| 104 | bool "Store applet usage messages in compressed form" |
| 105 | default y |
| 106 | depends on BUSYBOX_CONFIG_SHOW_USAGE |
| 107 | help |
| 108 | Store usage messages in compressed form, uncompress them on-the-fly |
| 109 | when <applet> --help is called. |
| 110 | |
| 111 | If you have a really tiny busybox with few applets enabled (and |
| 112 | bunzip2 isn't one of them), the overhead of the decompressor might |
| 113 | be noticeable. Also, if you run executables directly from ROM |
| 114 | and have very little memory, this might not be a win. Otherwise, |
| 115 | you probably want this. |
| 116 | |
| 117 | config BUSYBOX_CONFIG_FEATURE_INSTALLER |
| 118 | bool "Support --install [-s] to install applet links at runtime" |
| 119 | default n |
| 120 | help |
| 121 | Enable 'busybox --install [-s]' support. This will allow you to use |
| 122 | busybox at runtime to create hard links or symlinks for all the |
| 123 | applets that are compiled into busybox. |
| 124 | |
| 125 | config BUSYBOX_CONFIG_INSTALL_NO_USR |
| 126 | bool "Don't use /usr" |
| 127 | default n |
| 128 | help |
| 129 | Disable use of /usr. busybox --install and "make install" |
| 130 | will install applets only to /bin and /sbin, |
| 131 | never to /usr/bin or /usr/sbin. |
| 132 | |
| 133 | config BUSYBOX_CONFIG_LOCALE_SUPPORT |
| 134 | bool "Enable locale support (system needs locale for this to work)" |
| 135 | default n |
| 136 | help |
| 137 | Enable this if your system has locale support and you would like |
| 138 | busybox to support locale settings. |
| 139 | |
| 140 | config BUSYBOX_CONFIG_UNICODE_SUPPORT |
| 141 | bool "Support Unicode" |
| 142 | default n |
| 143 | help |
| 144 | This makes various applets aware that one byte is not |
| 145 | one character on screen. |
| 146 | |
| 147 | Busybox aims to eventually work correctly with Unicode displays. |
| 148 | Any older encodings are not guaranteed to work. |
| 149 | Probably by the time when busybox will be fully Unicode-clean, |
| 150 | other encodings will be mainly of historic interest. |
| 151 | |
| 152 | config BUSYBOX_CONFIG_UNICODE_USING_LOCALE |
| 153 | bool "Use libc routines for Unicode (else uses internal ones)" |
| 154 | default n |
| 155 | depends on BUSYBOX_CONFIG_UNICODE_SUPPORT && BUSYBOX_CONFIG_LOCALE_SUPPORT |
| 156 | help |
| 157 | With this option on, Unicode support is implemented using libc |
| 158 | routines. Otherwise, internal implementation is used. |
| 159 | Internal implementation is smaller. |
| 160 | |
| 161 | config BUSYBOX_CONFIG_FEATURE_CHECK_UNICODE_IN_ENV |
| 162 | bool "Check $LANG environment variable" |
| 163 | default n |
| 164 | depends on BUSYBOX_CONFIG_UNICODE_SUPPORT && !BUSYBOX_CONFIG_UNICODE_USING_LOCALE |
| 165 | help |
| 166 | With this option on, Unicode support is activated |
| 167 | only if LANG variable has the value of the form "xxxx.utf8" |
| 168 | |
| 169 | Otherwise, Unicode support will be always enabled and active. |
| 170 | |
| 171 | config BUSYBOX_CONFIG_SUBST_WCHAR |
| 172 | int "Character code to substitute unprintable characters with" |
| 173 | depends on BUSYBOX_CONFIG_UNICODE_SUPPORT |
| 174 | default 63 |
| 175 | help |
| 176 | Typical values are 63 for '?' (works with any output device), |
| 177 | 30 for ASCII substitute control code, |
| 178 | 65533 (0xfffd) for Unicode replacement character. |
| 179 | |
| 180 | config BUSYBOX_CONFIG_LAST_SUPPORTED_WCHAR |
| 181 | int "Range of supported Unicode characters" |
| 182 | depends on BUSYBOX_CONFIG_UNICODE_SUPPORT |
| 183 | default 767 |
| 184 | help |
| 185 | Any character with Unicode value bigger than this is assumed |
| 186 | to be non-printable on output device. Many applets replace |
| 187 | such chars with substitution character. |
| 188 | |
| 189 | The idea is that many valid printable Unicode chars are |
| 190 | nevertheless are not displayed correctly. Think about |
| 191 | combining charachers, double-wide hieroglyphs, obscure |
| 192 | characters in dozens of ancient scripts... |
| 193 | Many terminals, terminal emulators, xterms etc will fail |
| 194 | to handle them correctly. Choose the smallest value |
| 195 | which suits your needs. |
| 196 | |
| 197 | Typical values are: |
| 198 | 126 - ASCII only |
| 199 | 767 (0x2ff) - there are no combining chars in [0..767] range |
| 200 | (the range includes Latin 1, Latin Ext. A and B), |
| 201 | code is ~700 bytes smaller for this case. |
| 202 | 4351 (0x10ff) - there are no double-wide chars in [0..4351] range, |
| 203 | code is ~300 bytes smaller for this case. |
| 204 | 12799 (0x31ff) - nearly all non-ideographic characters are |
| 205 | available in [0..12799] range, including |
| 206 | East Asian scripts like katakana, hiragana, hangul, |
| 207 | bopomofo... |
| 208 | 0 - off, any valid printable Unicode character will be printed. |
| 209 | |
| 210 | config BUSYBOX_CONFIG_UNICODE_COMBINING_WCHARS |
| 211 | bool "Allow zero-width Unicode characters on output" |
| 212 | default n |
| 213 | depends on BUSYBOX_CONFIG_UNICODE_SUPPORT |
| 214 | help |
| 215 | With this option off, any Unicode char with width of 0 |
| 216 | is substituted on output. |
| 217 | |
| 218 | config BUSYBOX_CONFIG_UNICODE_WIDE_WCHARS |
| 219 | bool "Allow wide Unicode characters on output" |
| 220 | default n |
| 221 | depends on BUSYBOX_CONFIG_UNICODE_SUPPORT |
| 222 | help |
| 223 | With this option off, any Unicode char with width > 1 |
| 224 | is substituted on output. |
| 225 | |
| 226 | config BUSYBOX_CONFIG_UNICODE_BIDI_SUPPORT |
| 227 | bool "Bidirectional character-aware line input" |
| 228 | default n |
| 229 | depends on BUSYBOX_CONFIG_UNICODE_SUPPORT && !BUSYBOX_CONFIG_UNICODE_USING_LOCALE |
| 230 | help |
| 231 | With this option on, right-to-left Unicode characters |
| 232 | are treated differently on input (e.g. cursor movement). |
| 233 | |
| 234 | config BUSYBOX_CONFIG_UNICODE_NEUTRAL_TABLE |
| 235 | bool "In bidi input, support non-ASCII neutral chars too" |
| 236 | default n |
| 237 | depends on BUSYBOX_CONFIG_UNICODE_BIDI_SUPPORT |
| 238 | help |
| 239 | In most cases it's enough to treat only ASCII non-letters |
| 240 | (i.e. punctuation, numbers and space) as characters |
| 241 | with neutral directionality. |
| 242 | With this option on, more extensive (and bigger) table |
| 243 | of neutral chars will be used. |
| 244 | |
| 245 | config BUSYBOX_CONFIG_UNICODE_PRESERVE_BROKEN |
| 246 | bool "Make it possible to enter sequences of chars which are not Unicode" |
| 247 | default n |
| 248 | depends on BUSYBOX_CONFIG_UNICODE_SUPPORT |
| 249 | help |
| 250 | With this option on, on line-editing input (such as used by shells) |
| 251 | invalid UTF-8 bytes are not substituted with the selected |
| 252 | substitution character. |
| 253 | For example, this means that entering 'l', 's', ' ', 0xff, [Enter] |
| 254 | at shell prompt will list file named 0xff (single char name |
| 255 | with char value 255), not file named '?'. |
| 256 | |
| 257 | config BUSYBOX_CONFIG_LONG_OPTS |
| 258 | bool "Support for --long-options" |
| 259 | default y |
| 260 | help |
| 261 | Enable this if you want busybox applets to use the gnu --long-option |
| 262 | style, in addition to single character -a -b -c style options. |
| 263 | |
| 264 | config BUSYBOX_CONFIG_FEATURE_DEVPTS |
| 265 | bool "Use the devpts filesystem for Unix98 PTYs" |
| 266 | default y |
| 267 | help |
| 268 | Enable if you want BusyBox to use Unix98 PTY support. If enabled, |
| 269 | busybox will use /dev/ptmx for the master side of the pseudoterminal |
| 270 | and /dev/pts/<number> for the slave side. Otherwise, BSD style |
| 271 | /dev/ttyp<number> will be used. To use this option, you should have |
| 272 | devpts mounted. |
| 273 | |
| 274 | config BUSYBOX_CONFIG_FEATURE_CLEAN_UP |
| 275 | bool "Clean up all memory before exiting (usually not needed)" |
| 276 | default n |
| 277 | help |
| 278 | As a size optimization, busybox normally exits without explicitly |
| 279 | freeing dynamically allocated memory or closing files. This saves |
| 280 | space since the OS will clean up for us, but it can confuse debuggers |
| 281 | like valgrind, which report tons of memory and resource leaks. |
| 282 | |
| 283 | Don't enable this unless you have a really good reason to clean |
| 284 | things up manually. |
| 285 | |
| 286 | config BUSYBOX_CONFIG_FEATURE_UTMP |
| 287 | bool "Support utmp file" |
| 288 | default n |
| 289 | help |
| 290 | The file /var/run/utmp is used to track who is currently logged in. |
| 291 | With this option on, certain applets (getty, login, telnetd etc) |
| 292 | will create and delete entries there. |
| 293 | "who" applet requires this option. |
| 294 | |
| 295 | config BUSYBOX_CONFIG_FEATURE_WTMP |
| 296 | bool "Support wtmp file" |
| 297 | default n |
| 298 | depends on BUSYBOX_CONFIG_FEATURE_UTMP |
| 299 | help |
| 300 | The file /var/run/wtmp is used to track when users have logged into |
| 301 | and logged out of the system. |
| 302 | With this option on, certain applets (getty, login, telnetd etc) |
| 303 | will append new entries there. |
| 304 | "last" applet requires this option. |
| 305 | |
| 306 | config BUSYBOX_CONFIG_FEATURE_PIDFILE |
| 307 | bool "Support writing pidfiles" |
| 308 | default y |
| 309 | help |
| 310 | This option makes some applets (e.g. crond, syslogd, inetd) write |
| 311 | a pidfile in /var/run. Some applications rely on them. |
| 312 | |
| 313 | config BUSYBOX_CONFIG_FEATURE_SUID |
| 314 | bool "Support for SUID/SGID handling" |
| 315 | default y |
| 316 | help |
| 317 | With this option you can install the busybox binary belonging |
| 318 | to root with the suid bit set, enabling some applets to perform |
| 319 | root-level operations even when run by ordinary users |
| 320 | (for example, mounting of user mounts in fstab needs this). |
| 321 | |
| 322 | Busybox will automatically drop priviledges for applets |
| 323 | that don't need root access. |
| 324 | |
| 325 | If you are really paranoid and don't want to do this, build two |
| 326 | busybox binaries with different applets in them (and the appropriate |
| 327 | symlinks pointing to each binary), and only set the suid bit on the |
| 328 | one that needs it. |
| 329 | |
| 330 | The applets which require root rights (need suid bit or |
| 331 | to be run by root) and will refuse to execute otherwise: |
| 332 | crontab, login, passwd, su, vlock, wall. |
| 333 | |
| 334 | The applets which will use root rights if they have them |
| 335 | (via suid bit, or because run by root), but would try to work |
| 336 | without root right nevertheless: |
| 337 | findfs, ping[6], traceroute[6], mount. |
| 338 | |
| 339 | Note that if you DONT select this option, but DO make busybox |
| 340 | suid root, ALL applets will run under root, which is a huge |
| 341 | security hole (think "cp /some/file /etc/passwd"). |
| 342 | |
| 343 | config BUSYBOX_CONFIG_FEATURE_SUID_CONFIG |
| 344 | bool "Runtime SUID/SGID configuration via /etc/busybox.conf" |
| 345 | default n |
| 346 | depends on BUSYBOX_CONFIG_FEATURE_SUID |
| 347 | help |
| 348 | Allow the SUID / SGID state of an applet to be determined at runtime |
| 349 | by checking /etc/busybox.conf. (This is sort of a poor man's sudo.) |
| 350 | The format of this file is as follows: |
| 351 | |
| 352 | APPLET = [Ssx-][Ssx-][x-] [USER.GROUP] |
| 353 | |
| 354 | s: USER or GROUP is allowed to execute APPLET. |
| 355 | APPLET will run under USER or GROUP |
| 356 | (reagardless of who's running it). |
| 357 | S: USER or GROUP is NOT allowed to execute APPLET. |
| 358 | APPLET will run under USER or GROUP. |
| 359 | This option is not very sensical. |
| 360 | x: USER/GROUP/others are allowed to execute APPLET. |
| 361 | No UID/GID change will be done when it is run. |
| 362 | -: USER/GROUP/others are not allowed to execute APPLET. |
| 363 | |
| 364 | An example might help: |
| 365 | |
| 366 | [SUID] |
| 367 | su = ssx root.0 # applet su can be run by anyone and runs with |
| 368 | # euid=0/egid=0 |
| 369 | su = ssx # exactly the same |
| 370 | |
| 371 | mount = sx- root.disk # applet mount can be run by root and members |
| 372 | # of group disk (but not anyone else) |
| 373 | # and runs with euid=0 (egid is not changed) |
| 374 | |
| 375 | cp = --- # disable applet cp for everyone |
| 376 | |
| 377 | The file has to be owned by user root, group root and has to be |
| 378 | writeable only by root: |
| 379 | (chown 0.0 /etc/busybox.conf; chmod 600 /etc/busybox.conf) |
| 380 | The busybox executable has to be owned by user root, group |
| 381 | root and has to be setuid root for this to work: |
| 382 | (chown 0.0 /bin/busybox; chmod 4755 /bin/busybox) |
| 383 | |
| 384 | Robert 'sandman' Griebl has more information here: |
| 385 | <url: http://www.softforge.de/bb/suid.html >. |
| 386 | |
| 387 | config BUSYBOX_CONFIG_FEATURE_SUID_CONFIG_QUIET |
| 388 | bool "Suppress warning message if /etc/busybox.conf is not readable" |
| 389 | default n |
| 390 | depends on BUSYBOX_CONFIG_FEATURE_SUID_CONFIG |
| 391 | help |
| 392 | /etc/busybox.conf should be readable by the user needing the SUID, |
| 393 | check this option to avoid users to be notified about missing |
| 394 | permissions. |
| 395 | |
| 396 | config BUSYBOX_CONFIG_SELINUX |
| 397 | bool "Support NSA Security Enhanced Linux" |
| 398 | default n |
| 399 | select BUSYBOX_CONFIG_PLATFORM_LINUX |
| 400 | help |
| 401 | Enable support for SELinux in applets ls, ps, and id. Also provide |
| 402 | the option of compiling in SELinux applets. |
| 403 | |
| 404 | If you do not have a complete SELinux userland installed, this stuff |
| 405 | will not compile. Go visit |
| 406 | http://www.nsa.gov/selinux/index.html |
| 407 | to download the necessary stuff to allow busybox to compile with |
| 408 | this option enabled. Specifially, libselinux 1.28 or better is |
| 409 | directly required by busybox. If the installation is located in a |
| 410 | non-standard directory, provide it by invoking make as follows: |
| 411 | CFLAGS=-I<libselinux-include-path> \ |
| 412 | LDFLAGS=-L<libselinux-lib-path> \ |
| 413 | make |
| 414 | |
| 415 | Most people will leave this set to 'N'. |
| 416 | |
| 417 | config BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS |
| 418 | bool "exec prefers applets" |
| 419 | default y |
| 420 | help |
| 421 | This is an experimental option which directs applets about to |
| 422 | call 'exec' to try and find an applicable busybox applet before |
| 423 | searching the PATH. This is typically done by exec'ing |
| 424 | /proc/self/exe. |
| 425 | This may affect shell, find -exec, xargs and similar applets. |
| 426 | They will use applets even if /bin/<applet> -> busybox link |
| 427 | is missing (or is not a link to busybox). However, this causes |
| 428 | problems in chroot jails without mounted /proc and with ps/top |
| 429 | (command name can be shown as 'exe' for applets started this way). |
| 430 | |
| 431 | config BUSYBOX_CONFIG_BUSYBOX_EXEC_PATH |
| 432 | string "Path to BusyBox executable" |
| 433 | default "/proc/self/exe" |
| 434 | help |
| 435 | When Busybox applets need to run other busybox applets, BusyBox |
| 436 | sometimes needs to exec() itself. When the /proc filesystem is |
| 437 | mounted, /proc/self/exe always points to the currently running |
| 438 | executable. If you haven't got /proc, set this to wherever you |
| 439 | want to run BusyBox from. |
| 440 | |
| 441 | # These are auto-selected by other options |
| 442 | |
| 443 | config BUSYBOX_CONFIG_FEATURE_SYSLOG |
| 444 | bool #No description makes it a hidden option |
| 445 | default y |
| 446 | #help |
| 447 | # This option is auto-selected when you select any applet which may |
| 448 | # send its output to syslog. You do not need to select it manually. |
| 449 | |
| 450 | config BUSYBOX_CONFIG_FEATURE_HAVE_RPC |
| 451 | bool #No description makes it a hidden option |
| 452 | default n |
| 453 | #help |
| 454 | # This is automatically selected if any of enabled applets need it. |
| 455 | # You do not need to select it manually. |
| 456 | |
| 457 | endmenu |
| 458 | |
| 459 | menu 'Build Options' |
| 460 | |
| 461 | config BUSYBOX_CONFIG_STATIC |
| 462 | bool "Build BusyBox as a static binary (no shared libs)" |
| 463 | default n |
| 464 | help |
| 465 | If you want to build a static BusyBox binary, which does not |
| 466 | use or require any shared libraries, then enable this option. |
| 467 | This can cause BusyBox to be considerably larger, so you should |
| 468 | leave this option false unless you have a good reason (i.e. |
| 469 | your target platform does not support shared libraries, or |
| 470 | you are building an initrd which doesn't need anything but |
| 471 | BusyBox, etc). |
| 472 | |
| 473 | Most people will leave this set to 'N'. |
| 474 | |
| 475 | config BUSYBOX_CONFIG_PIE |
| 476 | bool "Build BusyBox as a position independent executable" |
| 477 | default n |
| 478 | depends on !BUSYBOX_CONFIG_STATIC |
| 479 | help |
| 480 | Hardened code option. PIE binaries are loaded at a different |
| 481 | address at each invocation. This has some overhead, |
| 482 | particularly on x86-32 which is short on registers. |
| 483 | |
| 484 | Most people will leave this set to 'N'. |
| 485 | |
| 486 | config BUSYBOX_CONFIG_NOMMU |
| 487 | bool "Force NOMMU build" |
| 488 | default n |
| 489 | help |
| 490 | Busybox tries to detect whether architecture it is being |
| 491 | built against supports MMU or not. If this detection fails, |
| 492 | or if you want to build NOMMU version of busybox for testing, |
| 493 | you may force NOMMU build here. |
| 494 | |
| 495 | Most people will leave this set to 'N'. |
| 496 | |
| 497 | # PIE can be made to work with BUILD_LIBBUSYBOX, but currently |
| 498 | # build system does not support that |
| 499 | config BUSYBOX_CONFIG_BUILD_LIBBUSYBOX |
| 500 | bool "Build shared libbusybox" |
| 501 | default n |
| 502 | depends on !BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS && !BUSYBOX_CONFIG_PIE && !BUSYBOX_CONFIG_STATIC |
| 503 | help |
| 504 | Build a shared library libbusybox.so.N.N.N which contains all |
| 505 | busybox code. |
| 506 | |
| 507 | This feature allows every applet to be built as a tiny |
| 508 | separate executable. Enabling it for "one big busybox binary" |
| 509 | approach serves no purpose and increases code size. |
| 510 | You should almost certainly say "no" to this. |
| 511 | |
| 512 | ### config FEATURE_FULL_LIBBUSYBOX |
| 513 | ### bool "Feature-complete libbusybox" |
| 514 | ### default n if !FEATURE_SHARED_BUSYBOX |
| 515 | ### depends on BUILD_LIBBUSYBOX |
| 516 | ### help |
| 517 | ### Build a libbusybox with the complete feature-set, disregarding |
| 518 | ### the actually selected config. |
| 519 | ### |
| 520 | ### Normally, libbusybox will only contain the features which are |
| 521 | ### used by busybox itself. If you plan to write a separate |
| 522 | ### standalone application which uses libbusybox say 'Y'. |
| 523 | ### |
| 524 | ### Note: libbusybox is GPL, not LGPL, and exports no stable API that |
| 525 | ### might act as a copyright barrier. We can and will modify the |
| 526 | ### exported function set between releases (even minor version number |
| 527 | ### changes), and happily break out-of-tree features. |
| 528 | ### |
| 529 | ### Say 'N' if in doubt. |
| 530 | |
| 531 | config BUSYBOX_CONFIG_FEATURE_INDIVIDUAL |
| 532 | bool "Produce a binary for each applet, linked against libbusybox" |
| 533 | default n |
| 534 | depends on BUSYBOX_CONFIG_BUILD_LIBBUSYBOX |
| 535 | help |
| 536 | If your CPU architecture doesn't allow for sharing text/rodata |
| 537 | sections of running binaries, but allows for runtime dynamic |
| 538 | libraries, this option will allow you to reduce memory footprint |
| 539 | when you have many different applets running at once. |
| 540 | |
| 541 | If your CPU architecture allows for sharing text/rodata, |
| 542 | having single binary is more optimal. |
| 543 | |
| 544 | Each applet will be a tiny program, dynamically linked |
| 545 | against libbusybox.so.N.N.N. |
| 546 | |
| 547 | You need to have a working dynamic linker. |
| 548 | |
| 549 | config BUSYBOX_CONFIG_FEATURE_SHARED_BUSYBOX |
| 550 | bool "Produce additional busybox binary linked against libbusybox" |
| 551 | default n |
| 552 | depends on BUSYBOX_CONFIG_BUILD_LIBBUSYBOX |
| 553 | help |
| 554 | Build busybox, dynamically linked against libbusybox.so.N.N.N. |
| 555 | |
| 556 | You need to have a working dynamic linker. |
| 557 | |
| 558 | ### config BUILD_AT_ONCE |
| 559 | ### bool "Compile all sources at once" |
| 560 | ### default n |
| 561 | ### help |
| 562 | ### Normally each source-file is compiled with one invocation of |
| 563 | ### the compiler. |
| 564 | ### If you set this option, all sources are compiled at once. |
| 565 | ### This gives the compiler more opportunities to optimize which can |
| 566 | ### result in smaller and/or faster binaries. |
| 567 | ### |
| 568 | ### Setting this option will consume alot of memory, e.g. if you |
| 569 | ### enable all applets with all features, gcc uses more than 300MB |
| 570 | ### RAM during compilation of busybox. |
| 571 | ### |
| 572 | ### This option is most likely only beneficial for newer compilers |
| 573 | ### such as gcc-4.1 and above. |
| 574 | ### |
| 575 | ### Say 'N' unless you know what you are doing. |
| 576 | |
| 577 | config BUSYBOX_CONFIG_LFS |
| 578 | bool |
| 579 | default y |
| 580 | help |
| 581 | If you want to build BusyBox with large file support, then enable |
| 582 | this option. This will have no effect if your kernel or your C |
| 583 | library lacks large file support for large files. Some of the |
| 584 | programs that can benefit from large file support include dd, gzip, |
| 585 | cp, mount, tar, and many others. If you want to access files larger |
| 586 | than 2 Gigabytes, enable this option. Otherwise, leave it set to 'N'. |
| 587 | |
| 588 | config BUSYBOX_CONFIG_CROSS_COMPILER_PREFIX |
| 589 | string "Cross Compiler prefix" |
| 590 | default "" |
| 591 | help |
| 592 | If you want to build BusyBox with a cross compiler, then you |
| 593 | will need to set this to the cross-compiler prefix, for example, |
| 594 | "i386-uclibc-". |
| 595 | |
| 596 | Note that CROSS_COMPILE environment variable or |
| 597 | "make CROSS_COMPILE=xxx ..." will override this selection. |
| 598 | |
| 599 | Native builds leave this empty. |
| 600 | |
| 601 | config BUSYBOX_CONFIG_EXTRA_CFLAGS |
| 602 | string "Additional CFLAGS" |
| 603 | default "" |
| 604 | help |
| 605 | Additional CFLAGS to pass to the compiler verbatim. |
| 606 | |
| 607 | endmenu |
| 608 | |
| 609 | menu 'Debugging Options' |
| 610 | |
| 611 | config BUSYBOX_CONFIG_DEBUG |
| 612 | bool "Build BusyBox with extra Debugging symbols" |
| 613 | default n |
| 614 | help |
| 615 | Say Y here if you wish to examine BusyBox internals while applets are |
| 616 | running. This increases the size of the binary considerably, and |
| 617 | should only be used when doing development. If you are doing |
| 618 | development and want to debug BusyBox, answer Y. |
| 619 | |
| 620 | Most people should answer N. |
| 621 | |
| 622 | config BUSYBOX_CONFIG_DEBUG_PESSIMIZE |
| 623 | bool "Disable compiler optimizations" |
| 624 | default n |
| 625 | depends on BUSYBOX_CONFIG_DEBUG |
| 626 | help |
| 627 | The compiler's optimization of source code can eliminate and reorder |
| 628 | code, resulting in an executable that's hard to understand when |
| 629 | stepping through it with a debugger. This switches it off, resulting |
| 630 | in a much bigger executable that more closely matches the source |
| 631 | code. |
| 632 | |
| 633 | config BUSYBOX_CONFIG_WERROR |
| 634 | bool "Abort compilation on any warning" |
| 635 | default n |
| 636 | help |
| 637 | Selecting this will add -Werror to gcc command line. |
| 638 | |
| 639 | Most people should answer N. |
| 640 | |
| 641 | choice |
| 642 | prompt "Additional debugging library" |
| 643 | default BUSYBOX_CONFIG_NO_DEBUG_LIB |
| 644 | help |
| 645 | Using an additional debugging library will make BusyBox become |
| 646 | considerable larger and will cause it to run more slowly. You |
| 647 | should always leave this option disabled for production use. |
| 648 | |
| 649 | dmalloc support: |
| 650 | ---------------- |
| 651 | This enables compiling with dmalloc ( http://dmalloc.com/ ) |
| 652 | which is an excellent public domain mem leak and malloc problem |
| 653 | detector. To enable dmalloc, before running busybox you will |
| 654 | want to properly set your environment, for example: |
| 655 | export DMALLOC_OPTIONS=debug=0x34f47d83,inter=100,log=logfile |
| 656 | The 'debug=' value is generated using the following command |
| 657 | dmalloc -p log-stats -p log-non-free -p log-bad-space \ |
| 658 | -p log-elapsed-time -p check-fence -p check-heap \ |
| 659 | -p check-lists -p check-blank -p check-funcs -p realloc-copy \ |
| 660 | -p allow-free-null |
| 661 | |
| 662 | Electric-fence support: |
| 663 | ----------------------- |
| 664 | This enables compiling with Electric-fence support. Electric |
| 665 | fence is another very useful malloc debugging library which uses |
| 666 | your computer's virtual memory hardware to detect illegal memory |
| 667 | accesses. This support will make BusyBox be considerable larger |
| 668 | and run slower, so you should leave this option disabled unless |
| 669 | you are hunting a hard to find memory problem. |
| 670 | |
| 671 | |
| 672 | config BUSYBOX_CONFIG_NO_DEBUG_LIB |
| 673 | bool "None" |
| 674 | |
| 675 | config BUSYBOX_CONFIG_DMALLOC |
| 676 | bool "Dmalloc" |
| 677 | |
| 678 | config BUSYBOX_CONFIG_EFENCE |
| 679 | bool "Electric-fence" |
| 680 | |
| 681 | endchoice |
| 682 | |
| 683 | endmenu |
| 684 | |
| 685 | menu 'Installation Options ("make install" behavior)' |
| 686 | |
| 687 | choice |
| 688 | prompt "What kind of applet links to install" |
| 689 | default BUSYBOX_CONFIG_INSTALL_APPLET_SYMLINKS |
| 690 | help |
| 691 | Choose what kind of links to applets are created by "make install". |
| 692 | |
| 693 | config BUSYBOX_CONFIG_INSTALL_APPLET_SYMLINKS |
| 694 | bool "as soft-links" |
| 695 | help |
| 696 | Install applets as soft-links to the busybox binary. This needs some |
| 697 | free inodes on the filesystem, but might help with filesystem |
| 698 | generators that can't cope with hard-links. |
| 699 | |
| 700 | config BUSYBOX_CONFIG_INSTALL_APPLET_HARDLINKS |
| 701 | bool "as hard-links" |
| 702 | help |
| 703 | Install applets as hard-links to the busybox binary. This might |
| 704 | count on a filesystem with few inodes. |
| 705 | |
| 706 | config BUSYBOX_CONFIG_INSTALL_APPLET_SCRIPT_WRAPPERS |
| 707 | bool "as script wrappers" |
| 708 | help |
| 709 | Install applets as script wrappers that call the busybox binary. |
| 710 | |
| 711 | config BUSYBOX_CONFIG_INSTALL_APPLET_DONT |
| 712 | bool "not installed" |
| 713 | help |
| 714 | Do not install applet links. Useful when you plan to use |
| 715 | busybox --install for installing links, or plan to use |
| 716 | a standalone shell and thus don't need applet links. |
| 717 | |
| 718 | endchoice |
| 719 | |
| 720 | choice |
| 721 | prompt "/bin/sh applet link" |
| 722 | default BUSYBOX_CONFIG_INSTALL_SH_APPLET_SYMLINK |
| 723 | depends on BUSYBOX_CONFIG_INSTALL_APPLET_SCRIPT_WRAPPERS |
| 724 | help |
| 725 | Choose how you install /bin/sh applet link. |
| 726 | |
| 727 | config BUSYBOX_CONFIG_INSTALL_SH_APPLET_SYMLINK |
| 728 | bool "as soft-link" |
| 729 | help |
| 730 | Install /bin/sh applet as soft-link to the busybox binary. |
| 731 | |
| 732 | config BUSYBOX_CONFIG_INSTALL_SH_APPLET_HARDLINK |
| 733 | bool "as hard-link" |
| 734 | help |
| 735 | Install /bin/sh applet as hard-link to the busybox binary. |
| 736 | |
| 737 | config BUSYBOX_CONFIG_INSTALL_SH_APPLET_SCRIPT_WRAPPER |
| 738 | bool "as script wrapper" |
| 739 | help |
| 740 | Install /bin/sh applet as script wrapper that calls |
| 741 | the busybox binary. |
| 742 | |
| 743 | endchoice |
| 744 | |
| 745 | config BUSYBOX_CONFIG_PREFIX |
| 746 | string "BusyBox installation prefix" |
| 747 | default "./_install" |
| 748 | help |
| 749 | Define your directory to install BusyBox files/subdirs in. |
| 750 | |
| 751 | endmenu |
| 752 | |
| 753 | source package/busybox/config/libbb/Config.in |
| 754 | |
| 755 | endmenu |
| 756 | |
| 757 | comment "Applets" |
| 758 | |
| 759 | source package/busybox/config/archival/Config.in |
| 760 | source package/busybox/config/coreutils/Config.in |
| 761 | source package/busybox/config/console-tools/Config.in |
| 762 | source package/busybox/config/debianutils/Config.in |
| 763 | source package/busybox/config/editors/Config.in |
| 764 | source package/busybox/config/findutils/Config.in |
| 765 | source package/busybox/config/init/Config.in |
| 766 | source package/busybox/config/loginutils/Config.in |
| 767 | source package/busybox/config/e2fsprogs/Config.in |
| 768 | source package/busybox/config/modutils/Config.in |
| 769 | source package/busybox/config/util-linux/Config.in |
| 770 | source package/busybox/config/miscutils/Config.in |
| 771 | source package/busybox/config/networking/Config.in |
| 772 | source package/busybox/config/printutils/Config.in |
| 773 | source package/busybox/config/mailutils/Config.in |
| 774 | source package/busybox/config/procps/Config.in |
| 775 | source package/busybox/config/runit/Config.in |
| 776 | source package/busybox/config/selinux/Config.in |
| 777 | source package/busybox/config/shell/Config.in |
| 778 | source package/busybox/config/sysklogd/Config.in |
| 779 | |
