summaryrefslogtreecommitdiffstats
path: root/scripts/Configure
blob: f931c4cbfd04243b8b31febc982725f34ff27a0e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
#! /bin/sh
#
# This script is used to configure the Linux kernel.
#
# It was inspired by the challenge in the original Configure script
# to ``do something better'', combined with the actual need to ``do
# something better'' because the old configure script wasn't flexible
# enough.
#
# Raymond Chen was the original author of Configure.
# Michael Elizabeth Chastain (mec@shout.net) is the current maintainer.
#
# 050793 - use IFS='@' to get around a bug in a pre-version of bash-1.13
# with an empty IFS.
#
# 030995 (storner@osiris.ping.dk) - added support for tri-state answers,
# for selecting modules to compile.
#
# 180995 Bernhard Kaindl (bkaindl@ping.at) - added dummy functions for
# use with a config.in modified for make menuconfig.
#
# 301195 (boldt@math.ucsb.edu) - added help text support
#
# 281295 Paul Gortmaker - make tri_state functions collapse to boolean
# if module support is not enabled.
#
# 010296 Aaron Ucko (ucko@vax1.rockhurst.edu) - fix int and hex to accept
# arbitrary ranges
#
# 150296 Dick Streefland (dicks@tasking.nl) - report new configuration
# items and ask for a value even when doing a "make oldconfig"
#
# 200396 Tom Dyas (tdyas@eden.rutgers.edu) - when the module option is
# chosen for an item, define the macro <option_name>_MODULE
#
# 090397 Axel Boldt (boldt@math.ucsb.edu) - avoid ? and + in regular 
# expressions for GNU expr since version 1.15 and up use \? and \+.
#
# 300397 Phil Blundell (pjb27@cam.ac.uk) - added support for min/max 
# arguments to "int", allow dep_tristate to take a list of dependencies
# rather than just one.
#
# 090398 Axel Boldt (boldt@math.ucsb.edu) - allow for empty lines in help
# texts.
#
# 102598 Michael Chastain (mec@shout.net) - put temporary files in
# current directory, not in /tmp.
#
# 24 January 1999, Michael Elizabeth Chastain, <mec@shout.net>
# - Improve the exit message (Jeff Ronne).

#
# Make sure we're really running bash.
#
# I would really have preferred to write this script in a language with
# better string handling, but alas, bash is the only scripting language
# that I can be reasonable sure everybody has on their linux machine.
#
[ -z "$BASH" ] && { echo "Configure requires bash" 1>&2; exit 1; }

# Disable filename globbing once and for all.
# Enable function cacheing.
set -f -h

#
# Dummy functions for use with a config.in modified for menuconf
#
function mainmenu_option () {
	:
}
function mainmenu_name () {
	:
}
function endmenu () {
	:
}

#
# help prints the corresponding help text from Configure.help to stdout
#
#       help variable
#
function help () {
  if [ -f Documentation/Configure.help ]
  then
     #first escape regexp special characters in the argument:
     var=$(echo "$1"|sed 's/[][\/.^$*]/\\&/g')
     #now pick out the right help text:
     text=$(sed -n "/^$var[ 	]*\$/,\${
			/^$var[ 	]*\$/c\\
${var}:\\

			/^#/b
			/^[^ 	]/q
			p
		    }" Documentation/Configure.help)
     if [ -z "$text" ]
     then
	  echo; echo "  Sorry, no help available for this option yet.";echo
     else
	  (echo; echo "$text") | ${PAGER:-more}
     fi
  else
     echo;
     echo "  Can't access the file Documentation/Configure.help which"
     echo "  should contain the help texts."
     echo
  fi
}


#
# readln reads a line into $ans.
#
#	readln prompt default oldval
#
function readln () {
	if [ "$DEFAULT" = "-d" -a -n "$3" ]; then
		echo "$1"
		ans=$2
	else
		echo -n "$1"
		[ -z "$3" ] && echo -n "(NEW) "
		IFS='@' read ans || exit 1
		[ -z "$ans" ] && ans=$2
	fi
}

#
# comment does some pretty-printing
#
#	comment 'xxx'
# 
function comment () {
	echo "*"; echo "* $1" ; echo "*"
	(echo "" ; echo "#"; echo "# $1" ; echo "#") >>$CONFIG
	(echo "" ; echo "/*"; echo " * $1" ; echo " */") >>$CONFIG_H
}

#
# define_bool sets the value of a boolean argument
#
#	define_bool define value
#
function define_bool () {
	define_tristate $1 $2
}

function define_tristate () {
	case "$2" in
	 "y")
		echo "$1=y" >>$CONFIG
		echo "#define $1 1" >>$CONFIG_H
		;;

	 "m")
		echo "$1=m" >>$CONFIG
		echo "#undef  $1" >>$CONFIG_H
		echo "#define $1_MODULE 1" >>$CONFIG_H
		;;

	 "n")
		echo "# $1 is not set" >>$CONFIG
		echo "#undef  $1" >>$CONFIG_H
		;;
	esac
	eval "$1=$2"
}

#
# bool processes a boolean argument
#
#	bool question define
#
function bool () {
	old=$(eval echo "\${$2}")
	def=${old:-'n'}
	case "$def" in
	 "y" | "m") defprompt="Y/n/?"
	      def="y"
	      ;;
	 "n") defprompt="N/y/?"
	      ;;
	esac
	while :; do
	  readln "$1 ($2) [$defprompt] " "$def" "$old"
	  case "$ans" in
	    [yY] | [yY]es ) define_bool "$2" "y"
			    break;;
	    [nN] | [nN]o )  define_bool "$2" "n"
			    break;;
	    * )             help "$2"
			    ;;
	  esac
	done
}

#
# tristate processes a tristate argument
#
#	tristate question define
#
function tristate () {
	if [ "$CONFIG_MODULES" != "y" ]; then
	  bool "$1" "$2"
	else 
	  old=$(eval echo "\${$2}")
	  def=${old:-'n'}
	  case "$def" in
	   "y") defprompt="Y/m/n/?"
		;;
	   "m") defprompt="M/n/y/?"
		;;
	   "n") defprompt="N/y/m/?"
		;;
	  esac
	  while :; do
	    readln "$1 ($2) [$defprompt] " "$def" "$old"
	    case "$ans" in
	      [yY] | [yY]es ) define_tristate "$2" "y"
			      break ;;
	      [nN] | [nN]o )  define_tristate "$2" "n"
			      break ;;
	      [mM] )          define_tristate "$2" "m"
			      break ;;
	      * )             help "$2"
			      ;;
	    esac
	  done
	fi
}

#
# dep_tristate processes a tristate argument that depends upon
# another option or options.  If any of the options we depend upon is a
# module, then the only allowable options are M or N.  If all are Y, then
# this is a normal tristate.  This is used in cases where modules
# are nested, and one module requires the presence of something
# else in the kernel.
#
#	dep_tristate question define default ...
#
function dep_tristate () {
	old=$(eval echo "\${$2}")
	def=${old:-'n'}
	ques=$1
	var=$2
	need_module=0
	shift 2
	while [ $# -gt 0 ]; do
	  case "$1" in
 	    n)
	      define_tristate "$var" "n"
	      return
	      ;;
	    m)
	      need_module=1
	      ;;
	  esac
	  shift
	done

	if [ $need_module = 1 ]; then
	   if [ "$CONFIG_MODULES" = "y" ]; then
		case "$def" in
		 "y" | "m") defprompt="M/n/?"
		      def="m"
		      ;;
		 "n") defprompt="N/m/?"
		      ;;
		esac
		while :; do
		  readln "$ques ($var) [$defprompt] " "$def" "$old"
		  case "$ans" in
		      [nN] | [nN]o )  define_tristate "$var" "n"
				      break ;;
		      [mM] )          define_tristate "$var" "m"
				      break ;;
		      [yY] | [yY]es ) echo 
   echo "  This answer is not allowed, because it is not consistent with"
   echo "  your other choices."
   echo "  This driver depends on another one which you chose to compile"
   echo "  as a module. This means that you can either compile this one"
   echo "  as a module as well (with M) or leave it out altogether (N)."
				      echo
				      ;;
		      * )             help "$var"
				      ;;
		  esac
		done
	   fi
	else
	   tristate "$ques" "$var"
	fi
}

function dep_bool () {
	ques=$1
	var=$2
	shift 2
	while [ $# -gt 0 ]; do
	  case "$1" in
	    m | n)
	      define_bool "$var" "n"
	      return
	      ;;
	  esac
	  shift
	done

	bool "$ques" "$var"
}

function dep_mbool () {
	ques=$1
	var=$2
	shift 2
	while [ $# -gt 0 ]; do
	  case "$1" in
	    n)
	      define_bool "$var" "n"
	      return
	      ;;
	  esac
	  shift
	done

	bool "$ques" "$var"
}

#
# define_int sets the value of a integer argument
#
#	define_int define value
#
function define_int () {
	echo "$1=$2" >>$CONFIG
	echo "#define $1 ($2)" >>$CONFIG_H
	eval "$1=$2"
}

#
# int processes an integer argument with optional limits
#
#	int question define default [min max]
#
function int () {
	old=$(eval echo "\${$2}")
	def=${old:-$3}
	if [ $# -gt 3 ]; then
	  min=$4
	else
	  min=-10000000    # !!
	fi
	if [ $# -gt 4 ]; then
	  max=$5
	else
	  max=10000000     # !!
	fi
	while :; do
	  readln "$1 ($2) [$def] " "$def" "$old"
	  if expr \( \( $ans + 0 \) \>= $min \) \& \( $ans \<= $max \) >/dev/null 2>&1 ; then
            define_int "$2" "$ans"
	    break
          else
	    help "$2"
          fi
	done
}

#
# define_hex sets the value of a hexadecimal argument
#
#	define_hex define value
#
function define_hex () {
	echo "$1=$2" >>$CONFIG
	echo "#define $1 0x${2#*[x,X]}" >>$CONFIG_H
	eval "$1=$2"
}

#
# hex processes an hexadecimal argument
#
#	hex question define default
#
function hex () {
	old=$(eval echo "\${$2}")
	def=${old:-$3}
	def=${def#*[x,X]}
	while :; do
	  readln "$1 ($2) [$def] " "$def" "$old"
	  ans=${ans#*[x,X]}
	  if expr "$ans" : '[0-9a-fA-F][0-9a-fA-F]*$' > /dev/null; then
	    define_hex "$2" "$ans"
	    break
	  else
	    help "$2"
	  fi
	done
}

#
# define_string sets the value of a string argument
#
#	define_string define value
#
function define_string () {
	echo "$1=\"$2\"" >>$CONFIG
	echo "#define $1 \"$2\"" >>$CONFIG_H
	eval "$1=\"$2\""
}

#
# string processes a string argument
#
#	string question define default
#
function string () {
	old=$(eval echo "\${$2}")
	def=${old:-$3}
	while :; do
          if [ "$old" = "?" ]; then
             readln "$1 ($2) [$def] " "$def" ""
          else
	     readln "$1 ($2) [$def] " "$def" "$old"
          fi
	  if [ "$ans" = "?" ]; then
	    help "$2"
	  else
	    break
	  fi
	done
	define_string "$2" "$ans"
}
#
# choice processes a choice list (1-out-of-n)
#
#	choice question choice-list default
#
# The choice list has a syntax of:
#	NAME WHITESPACE VALUE { WHITESPACE NAME WHITESPACE VALUE }
# The user may enter any unique prefix of one of the NAMEs and
# choice will define VALUE as if it were a boolean option.
# VALUE must be in all uppercase.  Normally, VALUE is of the
# form CONFIG_<something>.  Thus, if the user selects <something>,
# the CPP symbol CONFIG_<something> will be defined and the
# shell variable CONFIG_<something> will be set to "y".
#
function choice () {
	question="$1"
	choices="$2"
	old=
	def=$3

	# determine default answer:
	names=""
	set -- $choices
	firstvar=$2
	while [ -n "$2" ]; do
		if [ -n "$names" ]; then
			names="$names, $1"
		else
			names="$1"
		fi
		if [ "$(eval echo \"\${$2}\")" = "y" ]; then
			old=$1
			def=$1
		fi
		shift; shift
	done

	val=""
	while [ -z "$val" ]; do
		ambg=n
		readln "$question ($names) [$def] " "$def" "$old"
		ans=$(echo $ans | tr a-z A-Z)
		set -- $choices
		while [ -n "$1" ]; do
			name=$(echo $1 | tr a-z A-Z)
			case "$name" in
				"$ans"* | */"$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
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

CONFIG_IN=./config.in
if [ "$1" != "" ] ; then
	CONFIG_IN=$1
fi

DEFAULTS=arch/$ARCH/defconfig
if [ -f .config ]; then
  DEFAULTS=.config
fi

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

. $CONFIG_IN

rm -f .config.old
if [ -f .config ]; then
	mv .config .config.old
fi
mv .tmpconfig .config
mv .tmpconfig.h include/linux/autoconf.h

echo
echo "*** End of Linux kernel 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