706 lines
15 KiB
Bash
706 lines
15 KiB
Bash
#! /bin/sh
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#
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# This script is used to configure BusyBox.
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#
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# It was inspired by the challenge in the original Configure script
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# to ``do something better'', combined with the actual need to ``do
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# something better'' because the old configure script wasn't flexible
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# enough.
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#
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# Raymond Chen was the original author of Configure.
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# Michael Elizabeth Chastain (mec@shout.net) is the current maintainer.
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#
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# 050793 - use IFS='@' to get around a bug in a pre-version of bash-1.13
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# with an empty IFS.
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#
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# 030995 (storner@osiris.ping.dk) - added support for tri-state answers,
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# for selecting modules to compile.
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#
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# 180995 Bernhard Kaindl (bkaindl@ping.at) - added dummy functions for
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# use with a config.in modified for make menuconfig.
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#
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# 301195 (boldt@math.ucsb.edu) - added help text support
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#
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# 281295 Paul Gortmaker - make tri_state functions collapse to boolean
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# if module support is not enabled.
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#
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# 010296 Aaron Ucko (ucko@vax1.rockhurst.edu) - fix int and hex to accept
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# arbitrary ranges
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#
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# 150296 Dick Streefland (dicks@tasking.nl) - report new configuration
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# items and ask for a value even when doing a "make oldconfig"
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#
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# 200396 Tom Dyas (tdyas@eden.rutgers.edu) - when the module option is
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# chosen for an item, define the macro <option_name>_MODULE
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#
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# 090397 Axel Boldt (boldt@math.ucsb.edu) - avoid ? and + in regular
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# expressions for GNU expr since version 1.15 and up use \? and \+.
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#
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# 300397 Phil Blundell (pjb27@cam.ac.uk) - added support for min/max
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# arguments to "int", allow dep_tristate to take a list of dependencies
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# rather than just one.
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#
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# 090398 Axel Boldt (boldt@math.ucsb.edu) - allow for empty lines in help
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# texts.
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#
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# 102598 Michael Chastain (mec@shout.net) - put temporary files in
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# current directory, not in /tmp.
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#
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# 24 January 1999, Michael Elizabeth Chastain, <mec@shout.net>
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# - Improve the exit message (Jeff Ronne).
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#
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# 7 October 2000, Ghozlane Toumi, <gtoumi@messel.emse.fr>
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# added switches for "random" , "all yes" and "all modules"
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#
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#
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# Make sure we're really running bash.
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#
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# I would really have preferred to write this script in a language with
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# better string handling, but alas, bash is the only scripting language
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# that I can be reasonable sure everybody has on their linux machine.
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#
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[ -z "$BASH" ] && { echo "Configure requires bash" 1>&2; exit 1; }
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# Disable filename globbing once and for all.
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# Enable function cacheing.
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set -f -h
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#
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# Dummy functions for use with a config.in modified for menuconf
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#
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function mainmenu_option () {
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:
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}
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function mainmenu_name () {
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:
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}
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function endmenu () {
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:
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}
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#
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# returns a random number between 1 and $1
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#
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function rnd () {
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rnd=$[ $RANDOM % $1 + 1 ]
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}
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#
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# randomly chose a number in a config list (LIST_CONFIG_NAME)
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# or in a range ( MIN_CONFIG_NAME MAX_CONFIG_NAME )
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# ONLY if there is no forced default (and we are in an "auto" mode)
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# we are limited by the range of values taken by "$RANDOM"
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#
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# rndval CONFIG_NAME
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#
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function rndval () {
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[ "$AUTO" != "yes" -o -n "$old" ] && return
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def_list=$(eval echo "\${LIST_$1}")
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def_min=$(eval echo "\${MIN_$1}")
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def_max=$(eval echo "\${MAX_$1}")
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if [ -n "$def_list" ]; then
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set -- $(echo $def_list | sed 's/,/ /g')
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rnd $#
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while [ $rnd -le $# ] ; do
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def=$1
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shift
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done
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return
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fi
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if [ -n "$def_min" -a -n "$def_max" ]; then
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rnd $[ $def_max - $def_min ]
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def=$[ $def_min + $rnd ]
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fi
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}
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#
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# help prints the corresponding help text from Configure.help to stdout
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#
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# help variable
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#
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function help () {
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if [ -f Documentation/Configure.help ]
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then
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#first escape regexp special characters in the argument:
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var=$(echo "$1"|sed 's/[][\/.^$*]/\\&/g')
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#now pick out the right help text:
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text=$(sed -n "/^$var[ ]*\$/,\${
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/^$var[ ]*\$/c\\
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${var}:\\
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/^#/b
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/^[^ ]/q
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/<file:\\([^>]*\\)>/s//\\1/g
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p
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}" Documentation/Configure.help)
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if [ -z "$text" ]
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then
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echo; echo " Sorry, no help available for this option yet.";echo
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else
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(echo; echo "$text") | ${PAGER:-more}
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fi
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else
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echo;
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echo " Can't access the file Documentation/Configure.help which"
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echo " should contain the help texts."
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echo
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fi
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}
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#
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# readln reads a line into $ans.
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#
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# readln prompt default oldval
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#
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function readln () {
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if [ "$AUTO" = "yes" ]; then
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echo -n "$1"
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ans=$2
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echo $ans
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elif [ "$DEFAULT" = "-d" -a -n "$3" ]; then
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echo "$1"
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ans=$2
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else
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echo -n "$1"
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[ -z "$3" ] && echo -n "(NEW) "
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IFS='@' read ans || exit 1
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[ -z "$ans" ] && ans=$2
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fi
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}
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#
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# comment does some pretty-printing
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#
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# comment 'xxx'
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#
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function comment () {
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echo "*"; echo "* $1" ; echo "*"
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(echo "" ; echo "#"; echo "# $1" ; echo "#") >>$CONFIG
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(echo "" ; echo "/*"; echo " * $1" ; echo " */") >>$CONFIG_H
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}
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#
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# define_bool sets the value of a boolean argument
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#
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# define_bool define value
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#
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function define_bool () {
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define_tristate $1 $2
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}
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function define_tristate () {
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case "$2" in
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"y")
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echo "$1=y" >>$CONFIG
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echo "#define $1 1" >>$CONFIG_H
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;;
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"m")
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echo "$1=m" >>$CONFIG
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echo "#undef $1" >>$CONFIG_H
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echo "#define $1_MODULE 1" >>$CONFIG_H
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;;
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"n")
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echo "# $1 is not set" >>$CONFIG
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echo "#undef $1" >>$CONFIG_H
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;;
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esac
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eval "$1=$2"
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}
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#
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# bool processes a boolean argument
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#
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# bool question define
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#
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function bool () {
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old=$(eval echo "\${$2}")
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def=${old:-'n'}
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if [ "$AUTO" = "yes" -a -z "$old" ]; then
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if [ "$RND" = "-r" ]; then
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rnd 2
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case $rnd in
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"1") def="y" ;;
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"2") def="n" ;;
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esac
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else
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def=$DEF_ANS;
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fi
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fi
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case "$def" in
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"y" | "m") defprompt="Y/n/?"
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def="y"
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;;
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"n") defprompt="N/y/?"
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;;
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esac
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while :; do
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readln "$1 ($2) [$defprompt] " "$def" "$old"
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case "$ans" in
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[yY] | [yY]es ) define_bool "$2" "y"
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break;;
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[nN] | [nN]o ) define_bool "$2" "n"
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break;;
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* ) help "$2"
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;;
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esac
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done
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}
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#
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# tristate processes a tristate argument
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#
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# tristate question define
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#
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function tristate () {
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if [ "$CONFIG_MODULES" != "y" ]; then
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bool "$1" "$2"
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else
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old=$(eval echo "\${$2}")
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def=${old:-'n'}
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if [ "$AUTO" = "yes" -a -z "$old" ]; then
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if [ "$RND" = "-r" ]; then
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rnd 3
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case $rnd in
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"1") def="y" ;;
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"2") def="n" ;;
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"3") def="m" ;;
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esac
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else
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def=$DEF_ANS
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fi
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fi
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case "$def" in
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"y") defprompt="Y/m/n/?"
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;;
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"m") defprompt="M/n/y/?"
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;;
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"n") defprompt="N/y/m/?"
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;;
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esac
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while :; do
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readln "$1 ($2) [$defprompt] " "$def" "$old"
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case "$ans" in
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[yY] | [yY]es ) define_tristate "$2" "y"
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break ;;
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[nN] | [nN]o ) define_tristate "$2" "n"
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break ;;
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[mM] ) define_tristate "$2" "m"
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break ;;
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* ) help "$2"
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;;
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esac
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done
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fi
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}
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#
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# dep_tristate processes a tristate argument that depends upon
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# another option or options. If any of the options we depend upon is a
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# module, then the only allowable options are M or N. If all are Y, then
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# this is a normal tristate. This is used in cases where modules
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# are nested, and one module requires the presence of something
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# else in the kernel.
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#
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# dep_tristate question define default ...
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#
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function dep_tristate () {
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old=$(eval echo "\${$2}")
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def=${old:-'n'}
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ques=$1
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var=$2
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need_module=0
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shift 2
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while [ $# -gt 0 ]; do
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case "$1" in
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n)
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define_tristate "$var" "n"
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return
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;;
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m)
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need_module=1
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;;
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esac
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shift
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done
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if [ $need_module = 1 ]; then
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if [ "$CONFIG_MODULES" = "y" ]; then
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if [ "$AUTO" = "yes" -a -z "$old" ]; then
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if [ "$RND" = "-r" ]; then
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rnd 2
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case $rnd in
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"1") def="m" ;;
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"2") def="n" ;;
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esac
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else
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def=$DEF_ANS
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fi
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fi
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case "$def" in
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"y" | "m") defprompt="M/n/?"
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def="m"
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;;
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"n") defprompt="N/m/?"
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;;
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esac
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while :; do
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readln "$ques ($var) [$defprompt] " "$def" "$old"
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case "$ans" in
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[nN] | [nN]o ) define_tristate "$var" "n"
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break ;;
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[mM] ) define_tristate "$var" "m"
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break ;;
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[yY] | [yY]es ) echo
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echo " This answer is not allowed, because it is not consistent with"
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echo " your other choices."
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echo " This driver depends on another one which you chose to compile"
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echo " as a module. This means that you can either compile this one"
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echo " as a module as well (with M) or leave it out altogether (N)."
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echo
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;;
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* ) help "$var"
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;;
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esac
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done
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fi
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else
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tristate "$ques" "$var"
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fi
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}
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function dep_bool () {
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ques=$1
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var=$2
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shift 2
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while [ $# -gt 0 ]; do
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case "$1" in
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m | n)
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define_bool "$var" "n"
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return
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;;
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esac
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shift
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done
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bool "$ques" "$var"
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}
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function dep_mbool () {
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ques=$1
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var=$2
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shift 2
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while [ $# -gt 0 ]; do
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case "$1" in
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n)
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define_bool "$var" "n"
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return
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;;
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esac
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shift
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done
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bool "$ques" "$var"
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}
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#
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# define_int sets the value of a integer argument
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#
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# define_int define value
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#
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function define_int () {
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echo "$1=$2" >>$CONFIG
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echo "#define $1 ($2)" >>$CONFIG_H
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eval "$1=$2"
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}
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#
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# int processes an integer argument with optional limits
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#
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# int question define default [min max]
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#
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function int () {
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old=$(eval echo "\${$2}")
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def=${old:-$3}
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if [ $# -gt 3 ]; then
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min=$4
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else
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min=-10000000 # !!
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fi
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if [ $# -gt 4 ]; then
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max=$5
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else
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max=10000000 # !!
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fi
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rndval $2
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while :; do
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readln "$1 ($2) [$def] " "$def" "$old"
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if expr \( \( $ans + 0 \) \>= $min \) \& \( $ans \<= $max \) >/dev/null 2>&1 ; then
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define_int "$2" "$ans"
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break
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else
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help "$2"
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fi
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done
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}
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#
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# define_hex sets the value of a hexadecimal argument
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#
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# define_hex define value
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#
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function define_hex () {
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echo "$1=$2" >>$CONFIG
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echo "#define $1 0x${2#*[x,X]}" >>$CONFIG_H
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eval "$1=$2"
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}
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#
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# hex processes an hexadecimal argument
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#
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# hex question define default
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#
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function hex () {
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old=$(eval echo "\${$2}")
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def=${old:-$3}
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def=${def#*[x,X]}
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rndval $2
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while :; do
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readln "$1 ($2) [$def] " "$def" "$old"
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ans=${ans#*[x,X]}
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if expr "$ans" : '[0-9a-fA-F][0-9a-fA-F]*$' > /dev/null; then
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define_hex "$2" "$ans"
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break
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else
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help "$2"
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fi
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done
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}
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#
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# define_string sets the value of a string argument
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#
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# define_string define value
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#
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function define_string () {
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echo "$1=\"$2\"" >>$CONFIG
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echo "#define $1 \"$2\"" >>$CONFIG_H
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eval "$1=\"$2\""
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}
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#
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# string processes a string argument
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#
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# string question define default
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#
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function string () {
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old=$(eval echo "\${$2}")
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def=${old:-$3}
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while :; do
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if [ "$old" = "?" ]; then
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readln "$1 ($2) [$def] " "$def" ""
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else
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readln "$1 ($2) [$def] " "$def" "$old"
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fi
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if [ "$ans" = "?" ]; then
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help "$2"
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else
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break
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fi
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done
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define_string "$2" "$ans"
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}
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#
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# choice processes a choice list (1-out-of-n)
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#
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# choice question choice-list default
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#
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# The choice list has a syntax of:
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# NAME WHITESPACE VALUE { WHITESPACE NAME WHITESPACE VALUE }
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# The user may enter any unique prefix of one of the NAMEs and
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# choice will define VALUE as if it were a boolean option.
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# VALUE must be in all uppercase. Normally, VALUE is of the
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# form CONFIG_<something>. Thus, if the user selects <something>,
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# the CPP symbol CONFIG_<something> will be defined and the
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# shell variable CONFIG_<something> will be set to "y".
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#
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function choice () {
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question="$1"
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choices="$2"
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old=
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def=$3
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# determine default answer:
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names=""
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set -- $choices
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firstvar=$2
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while [ -n "$2" ]; do
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if [ -n "$names" ]; then
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names="$names, $1"
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else
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names="$1"
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fi
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if [ "$(eval echo \"\${$2}\")" = "y" ]; then
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old=$1
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def=$1
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fi
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shift; shift
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done
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if [ "$RND" = "-r" -a -z "$old" ] ; then
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set -- $choices
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rnd $#
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while [ $rnd -le $# ] ; do
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def=$1
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shift ; shift
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done
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fi
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val=""
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while [ -z "$val" ]; do
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ambg=n
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readln "$question ($names) [$def] " "$def" "$old"
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ans=$(echo $ans | tr a-z A-Z)
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set -- $choices
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while [ -n "$1" ]; do
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name=$(echo $1 | tr a-z A-Z)
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case "$name" in
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"$ans"* | */"$ans"* )
|
|
case "$name" in
|
|
"$ans" | */"$ans"/* | \
|
|
"$ans"/* | */"$ans" )
|
|
val="$2"
|
|
break # exact match
|
|
;;
|
|
esac
|
|
if [ -n "$val" ]; then
|
|
echo;echo \
|
|
" Sorry, \"$ans\" is ambiguous; please enter a longer string."
|
|
echo
|
|
val=""
|
|
ambg=y
|
|
break
|
|
else
|
|
val="$2"
|
|
fi;;
|
|
esac
|
|
shift; shift
|
|
done
|
|
if [ "$val" = "" -a "$ambg" = "n" ]; then
|
|
help "$firstvar"
|
|
fi
|
|
done
|
|
set -- $choices
|
|
while [ -n "$2" ]; do
|
|
if [ "$2" = "$val" ]; then
|
|
echo " defined $val"
|
|
define_bool "$2" "y"
|
|
else
|
|
define_bool "$2" "n"
|
|
fi
|
|
shift; shift
|
|
done
|
|
}
|
|
|
|
CONFIG=.tmpconfig
|
|
CONFIG_H=.tmpconfig.h
|
|
FORCE_DEFAULT=.force_default
|
|
trap "rm -f $CONFIG $CONFIG_H ; exit 1" 1 2
|
|
|
|
#
|
|
# Make sure we start out with a clean slate.
|
|
#
|
|
echo "#" > $CONFIG
|
|
echo "# Automatically generated make config: don't edit" >> $CONFIG
|
|
echo "#" >> $CONFIG
|
|
|
|
echo "/*" > $CONFIG_H
|
|
echo " * Automatically generated C config: don't edit" >> $CONFIG_H
|
|
echo " */" >> $CONFIG_H
|
|
echo "#define AUTOCONF_INCLUDED" >> $CONFIG_H
|
|
|
|
DEFAULT=""
|
|
if [ "$1" = "-d" ] ; then
|
|
DEFAULT="-d"
|
|
shift
|
|
fi
|
|
|
|
RND=""
|
|
DEF_ANS=""
|
|
AUTO=""
|
|
case "$1" in
|
|
-r) RND="-r" ; AUTO="yes" ; shift ;;
|
|
-y) DEF_ANS="y" ; AUTO="yes" ; shift ;;
|
|
-m) DEF_ANS="m" ; AUTO="yes" ; shift ;;
|
|
-n) DEF_ANS="n" ; AUTO="yes" ; shift ;;
|
|
esac
|
|
|
|
CONFIG_IN=./config.in
|
|
if [ "$1" != "" ] ; then
|
|
CONFIG_IN=$1
|
|
fi
|
|
|
|
DEFAULTS=sysdeps/$TARGET_OS/defconfig
|
|
if [ -f .config ]; then
|
|
DEFAULTS=.config
|
|
fi
|
|
|
|
if [ "$AUTO" != "yes" ]; then
|
|
if [ -f $DEFAULTS ]; then
|
|
echo "#"
|
|
echo "# Using defaults found in" $DEFAULTS
|
|
echo "#"
|
|
. $DEFAULTS
|
|
sed -e 's/# \(CONFIG_[^ ]*\) is not.*/\1=n/' <$DEFAULTS >.config-is-not.$$
|
|
. .config-is-not.$$
|
|
rm .config-is-not.$$
|
|
else
|
|
echo "#"
|
|
echo "# No defaults found"
|
|
echo "#"
|
|
fi
|
|
else
|
|
if [ -f $FORCE_DEFAULT ]; then
|
|
echo "#"
|
|
echo "# Forcing defaults found in $FORCE_DEFAULT"
|
|
echo "#"
|
|
sed -e '
|
|
s/# \(CONFIG_[^ ]*\) is not.*/\1=n/;
|
|
s/# range \(CONFIG_[^ ]*\) \([^ ][^ ]*\) \([^ ][^ ]*\)/MIN_\1=\2; MAX_\1=\3/;
|
|
s/# list \(CONFIG_[^ ]*\) \([^ ][^ ]*\)/LIST_\1=\2/
|
|
' <$FORCE_DEFAULT >.default_val.$$
|
|
. .default_val.$$
|
|
rm .default_val.$$
|
|
else
|
|
echo "#"
|
|
echo "# No defaults found"
|
|
echo "#"
|
|
fi
|
|
fi
|
|
|
|
. $CONFIG_IN
|
|
|
|
rm -f .config.old
|
|
if [ -f .config ]; then
|
|
mv .config .config.old
|
|
fi
|
|
mv .tmpconfig .config
|
|
mv .tmpconfig.h include/config.h
|
|
|
|
echo
|
|
echo "*** End of BusyBox configuration."
|
|
echo "*** Check the top-level Makefile for additional configuration."
|
|
if [ ! -f .hdepend -o "$CONFIG_MODVERSIONS" = "y" ] ; then
|
|
echo "*** Next, you must run 'make dep'."
|
|
else
|
|
echo "*** Next, you may run 'make bzImage', 'make bzdisk', or 'make install'."
|
|
fi
|
|
echo
|
|
|
|
exit 0
|