[metaconfig.git] / U / modified / Options.U

?RCS: $Id: Options.U,v 3.0.1.7 1997/02/28 15:08:15 ram Exp $
?RCS:
?RCS: Copyright (c) 1991-1993, Raphael Manfredi
?RCS: 
?RCS: You may redistribute only under the terms of the Artistic Licence,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic Licence; a copy of which may be found at the root
?RCS: of the source tree for dist 3.0.
?RCS:
?RCS: $Log: Options.U,v $
?RCS: Revision 3.0.1.7  1997/02/28  15:08:15  ram
?RCS: patch61: optdef.sh now starts with a "startsh"
?RCS: patch61: moved some code from Head.U
?RCS:
?RCS: Revision 3.0.1.6  1995/09/25  09:14:46  ram
?RCS: patch59: protected option parsing code against 'echo -*' option failure
?RCS:
?RCS: Revision 3.0.1.5  1995/05/12  12:04:52  ram
?RCS: patch54: added -K option for experts
?RCS:
?RCS: Revision 3.0.1.4  1995/01/30  14:27:52  ram
?RCS: patch49: this unit now exports file optdef.sh, not a variable
?RCS:
?RCS: Revision 3.0.1.3  1995/01/11  15:19:00  ram
?RCS: patch45: new -O option allowing -D and -U to override config.sh setttings
?RCS: patch45: file optdef.sh is no longer removed after sourcing
?RCS:
?RCS: Revision 3.0.1.2  1994/10/29  15:58:06  ram
?RCS: patch36: ensure option definition file is removed before appending
?RCS: patch36: protect variable definitions with spaces in them
?RCS:
?RCS: Revision 3.0.1.1  1994/06/20  06:55:44  ram
?RCS: patch30: now uses new me symbol to tag error messages
?RCS: patch30: new -D and -U options to define/undef symbols (JHI)
?RCS:
?RCS: Revision 3.0  1993/08/18  12:05:14  ram
?RCS: Baseline for dist 3.0 netwide release.
?RCS:
?X:
?X: Command line parsing. It is really important that the variables used here
?X:	be not listed in the MAKE line, or they will be saved in config.sh and
?X: loading this file to fetch default answers would clobber the values set
?X:	herein.
?X:
?MAKE:Options: startsh
?MAKE:	-pick wipe $@ %<
?V:reuseval alldone error realsilent silent extractsh fastread \
	override knowitall: config_sh
?T:arg argn symbol config_arg0 config_args config_argc xxx yyy zzz uuu
?T:args_exp args_sep arg_exp libswanted
?F:./optdef.sh ./cmdline.opt ./posthint.sh ./cmdl.opt

: Save command line options in file UU/cmdline.opt for later use in
: generating config.sh.
?X: This temporary file will be read by Oldsym.U.  I used a temporary
?X: file to preserve all sorts of potential command line quotes and
?X: also because we don't know in advance how many variables we'll
?X: need, so I can't actually declare them on the MAKE line.
?X: The config_args variable won't be quite correct if Configure is
?X: fed something like    ./Configure -Dcc="gcc -B/usr/ccs/bin/"
?X: since the quotes are gone by the time we see them.  You'd have to
?X: reconstruct the command line from the config_arg? lines, but since
?X: I don't imagine anyone actually having to do that, I'm not going
?X: to worry too much.
cat > cmdline.opt <<EOSH
# Configure command line arguments.
config_arg0='$0'
config_args='$*'
config_argc=$#
EOSH
argn=1
args_exp=''
args_sep=''
for arg in "$@"; do
	cat >>cmdline.opt <<EOSH
config_arg$argn='$arg'
EOSH
	# Extreme backslashitis: replace each ' by '"'"'
	cat <<EOC | sed -e "s/'/'"'"'"'"'"'"'/g" > cmdl.opt
$arg
EOC
	arg_exp=`cat cmdl.opt`
	args_exp="$args_exp$args_sep'$arg_exp'"
	argn=`expr $argn + 1`
	args_sep=' '
done
# args_exp is good for restarting self: eval "set X $args_exp"; shift; $0 "$@"
# used by ./hints/os2.sh
rm -f cmdl.opt

: produce awk script to parse command line options
cat >options.awk <<'EOF'
BEGIN {
	optstr = "A:dD:eEf:hKOrsSU:V";	# getopt-style specification

	len = length(optstr);
	for (i = 1; i <= len; i++) {
		c = substr(optstr, i, 1);
?X: some older awk's do not have the C ?: construct
		if (i < len) a = substr(optstr, i + 1, 1); else a = "";
		if (a == ":") {
			arg[c] = 1;
			i++;
		}
		opt[c] = 1;
	}
}
{
	expect = 0;
	str = $0;
	if (substr(str, 1, 1) != "-") {
		printf("'%s'\n", str);
		next;
	}
	len = length($0);
	for (i = 2; i <= len; i++) {
		c = substr(str, i, 1);
		if (!opt[c]) {
			printf("-%s\n", substr(str, i));
			next;
		}
		printf("-%s\n", c);
		if (arg[c]) {
			if (i < len)
				printf("'%s'\n", substr(str, i + 1));
			else
				expect = 1;
			next;
		}
	}
}
END {
	if (expect)
		print "?";
}
EOF

: process the command line options
?X: Use "$@" to keep arguments with spaces in them from being split apart.
?X: For the same reason, awk will output quoted arguments and the final eval
?X: removes them and sets a proper $* array. An 'X' is prependend to each
?X: argument before being fed to echo to guard against 'echo -x', where -x
?X: would be understood as an echo option! It is removed before feeding awk.
set X `for arg in "$@"; do echo "X$arg"; done |
	sed -e s/X// | awk -f options.awk`
eval "set $*"
shift
rm -f options.awk

: set up default values
fastread=''
reuseval=false
config_sh=''
alldone=''
error=''
silent=''
extractsh=''
override=''
knowitall=''
rm -f optdef.sh posthint.sh
cat >optdef.sh <<EOS
$startsh
EOS

?X:
?X: Given that we now have the possibility to execute Configure remotely
?X: thanks to the new src.U support, we have to face the possibility
?X: of having to ask where the source lie, which means we need the Myread.U
?X: stuff and possibly other things that might echo something on the
?X: screen...
?X:
?X: That's not pretty, and might be confusing in 99% of the time. So...
?X: We introduce a new realsilent variable which is set when -s is given,
?X: and we force silent=true if -S is supplied. The Extractall.U unit
?X: will then undo the >&4 redirection based on the value of the
?X: realsilent variable... -- RAM, 18/93/96
?X:

: option parsing
while test $# -gt 0; do
	case "$1" in
	-d) shift; fastread=yes;;
	-e) shift; alldone=cont;;
	-f)
		shift
		cd ..
		if test -r "$1"; then
			config_sh="$1"
		else
			echo "$me: cannot read config file $1." >&2
			error=true
		fi
		cd UU
		shift;;
	--help|\
	-h) shift; error=true;;
	-r) shift; reuseval=true;;
	-s) shift; silent=true; realsilent=true;;
	-E) shift; alldone=exit;;
	-K) shift; knowitall=true;;
	-O) shift; override=true;;
	-S) shift; silent=true; extractsh=true;;
	-D)
		shift
		case "$1" in
		*=)
			echo "$me: use '-U symbol=', not '-D symbol='." >&2
			echo "$me: ignoring -D $1" >&2
			;;
		*=*) echo "$1" | \
				sed -e "s/'/'\"'\"'/g" -e "s/=\(.*\)/='\1'/" >> optdef.sh;;
		*) echo "$1='define'" >> optdef.sh;;
		esac
		shift
		;;
	-U)
		shift
		case "$1" in
		*=) echo "$1" >> optdef.sh;;
		*=*)
			echo "$me: use '-D symbol=val', not '-U symbol=val'." >&2
			echo "$me: ignoring -U $1" >&2
			;;
		*) echo "$1='undef'" >> optdef.sh;;
		esac
		shift
		;;
	-A)
	    shift
	    xxx=''
	    yyy="$1"
	    zzz=''
	    uuu=undef
	    case "$yyy" in
            *=*) zzz=`echo "$yyy"|sed 's!=.*!!'`
                 case "$zzz" in
                 *:*) zzz='' ;;
                 *)   xxx=append
                      zzz=" "`echo "$yyy"|sed 's!^[^=]*=!!'` 
                      yyy=`echo "$yyy"|sed 's!=.*!!'` ;;
                 esac
                 ;;
            esac
            case "$xxx" in
            '')  case "$yyy" in
                 *:*) xxx=`echo "$yyy"|sed 's!:.*!!'`
                      yyy=`echo "$yyy"|sed 's!^[^:]*:!!'`
                      zzz=`echo "$yyy"|sed 's!^[^=]*=!!'`
                      yyy=`echo "$yyy"|sed 's!=.*!!'` ;;
                 *)   xxx=`echo "$yyy"|sed 's!:.*!!'`
                      yyy=`echo "$yyy"|sed 's!^[^:]*:!!'` ;;
                 esac
                 ;;       
            esac
	    case "$xxx" in
	    append)
		echo "$yyy=\"\${$yyy}$zzz\""	>> posthint.sh ;;
	    clear)
		echo "$yyy=''"			>> posthint.sh ;;
	    define)
	        case "$zzz" in
		'') zzz=define ;;
		esac
		echo "$yyy='$zzz'"		>> posthint.sh ;;
	    eval)
		echo "eval \"$yyy=$zzz\""	>> posthint.sh ;;
	    prepend)
		echo "$yyy=\"$zzz\${$yyy}\""	>> posthint.sh ;;
	    undef)
	        case "$zzz" in
		'') zzz="$uuu" ;;
		esac
		echo "$yyy=$zzz"		>> posthint.sh ;;
            *)  echo "$me: unknown -A command '$xxx', ignoring -A $1" >&2 ;;
	    esac
	    shift
	    ;;
	-V) echo "$me generated by metaconfig <VERSION> PL<PATCHLEVEL>." >&2
	    exit 0;;
	--) break;;
	-*) echo "$me: unknown option $1" >&2; shift; error=true;;
	*) break;;
	esac
done

case "$error" in
true)
	cat >&2 <<EOM
Usage: $me [-dehrsEKOSV] [-f config.sh] [-D symbol] [-D symbol=value]
                 [-U symbol] [-U symbol=] [-A command:symbol...]
  -d : use defaults for all answers.
  -e : go on without questioning past the production of config.sh.
  -f : specify an alternate default configuration file.
  -h : print this help message and exit (with an error status).
  -r : reuse C symbols value if possible (skips costly nm extraction).
  -s : silent mode, only echoes questions and essential information.
  -D : define symbol to have some value:
         -D symbol         symbol gets the value 'define'
         -D symbol=value   symbol gets the value 'value'
       common used examples (see INSTALL for more info):
         -Duse64bitint            use 64bit integers
         -Duse64bitall            use 64bit integers and pointers
         -Dusethreads             use thread support
         -Dinc_version_list=none  do not include older perl trees in @INC
         -DEBUGGING=none          DEBUGGING options
         -Dcc=gcc                 choose your compiler
         -Dprefix=/opt/perl5      choose your destination
  -E : stop at the end of questions, after having produced config.sh.
  -K : do not use unless you know what you are doing.
  -O : let -D and -U override definitions from loaded configuration file.
  -S : perform variable substitutions on all .SH files (can mix with -f)
  -U : undefine symbol:
         -U symbol    symbol gets the value 'undef'
         -U symbol=   symbol gets completely empty
       e.g.:  -Uversiononly
  -A : manipulate symbol after the platform specific hints have been applied:
	 -A symbol=value		append " "value to symbol
	 -A append:symbol=value		append value to symbol
	 -A define:symbol=value		define symbol to have value
         -A clear:symbol		define symbol to be ''
	 -A define:symbol		define symbol to be 'define'
	 -A eval:symbol=value		define symbol to be eval of value
	 -A prepend:symbol=value	prepend value to symbol
	 -A undef:symbol		define symbol to be 'undef'
	 -A undef:symbol=		define symbol to be ''
       e.g.:  -A prepend:libswanted='cl pthread '
  -V : print version number and exit (with a zero status).
EOM
	exit 1
	;;
esac

?X:
?X: Unless they specified either -S or both -d and -e/E, make sure we're
?X: running interactively, i.e. attached to a terminal. Moved from Head.U to
?X: be able to handle batch configurations...
?X:
?X: We have to hardwire the Configure name and cannot use $me, since if they
?X: said 'sh <Configure', then $me is 'sh'...
?X:
: Sanity checks
case "$fastread$alldone" in
yescont|yesexit) ;;
*)
	case "$extractsh" in
	true) ;;
	*)
		if test ! -t 0; then
			echo "Say 'sh Configure', not 'sh <Configure'"
			exit 1
		fi
		;;
	esac
	;;
esac

?X: In silent mode, the standard output is closed. Questions are asked by
?X: outputing on file descriptor #4, which is the original stdout descriptor.
?X: This filters out all the "junk", since all the needed information is written
?X: on #4. Note that ksh will not let us redirect output if the file descriptor
?X: has not be defined yet, unlike sh, hence the following line...--RAM.
exec 4>&1
case "$silent" in
true) exec 1>/dev/null;;
esac

: run the defines and the undefines, if any, but leave the file out there...
touch optdef.sh
. ./optdef.sh
: create the posthint manipulation script and leave the file out there...
touch posthint.sh
Commit	Line	Data
959f3c4c JH	1	?RCS: $Id: Options.U,v 3.0.1.7 1997/02/28 15:08:15 ram Exp $
	2	?RCS:
	3	?RCS: Copyright (c) 1991-1993, Raphael Manfredi
	4	?RCS:
	5	?RCS: You may redistribute only under the terms of the Artistic Licence,
	6	?RCS: as specified in the README file that comes with the distribution.
	7	?RCS: You may reuse parts of this distribution only within the terms of
	8	?RCS: that same Artistic Licence; a copy of which may be found at the root
	9	?RCS: of the source tree for dist 3.0.
	10	?RCS:
	11	?RCS: $Log: Options.U,v $
	12	?RCS: Revision 3.0.1.7 1997/02/28 15:08:15 ram
	13	?RCS: patch61: optdef.sh now starts with a "startsh"
	14	?RCS: patch61: moved some code from Head.U
	15	?RCS:
	16	?RCS: Revision 3.0.1.6 1995/09/25 09:14:46 ram
	17	?RCS: patch59: protected option parsing code against 'echo -*' option failure
	18	?RCS:
	19	?RCS: Revision 3.0.1.5 1995/05/12 12:04:52 ram
	20	?RCS: patch54: added -K option for experts
	21	?RCS:
	22	?RCS: Revision 3.0.1.4 1995/01/30 14:27:52 ram
	23	?RCS: patch49: this unit now exports file optdef.sh, not a variable
	24	?RCS:
	25	?RCS: Revision 3.0.1.3 1995/01/11 15:19:00 ram
	26	?RCS: patch45: new -O option allowing -D and -U to override config.sh setttings
	27	?RCS: patch45: file optdef.sh is no longer removed after sourcing
	28	?RCS:
	29	?RCS: Revision 3.0.1.2 1994/10/29 15:58:06 ram
	30	?RCS: patch36: ensure option definition file is removed before appending
	31	?RCS: patch36: protect variable definitions with spaces in them
	32	?RCS:
	33	?RCS: Revision 3.0.1.1 1994/06/20 06:55:44 ram
	34	?RCS: patch30: now uses new me symbol to tag error messages
	35	?RCS: patch30: new -D and -U options to define/undef symbols (JHI)
	36	?RCS:
	37	?RCS: Revision 3.0 1993/08/18 12:05:14 ram
	38	?RCS: Baseline for dist 3.0 netwide release.
	39	?RCS:
	40	?X:
	41	?X: Command line parsing. It is really important that the variables used here
	42	?X: be not listed in the MAKE line, or they will be saved in config.sh and
	43	?X: loading this file to fetch default answers would clobber the values set
	44	?X: herein.
	45	?X:
	46	?MAKE:Options: startsh
	47	?MAKE: -pick wipe $@ %<
	48	?V:reuseval alldone error realsilent silent extractsh fastread \
	49	override knowitall: config_sh
c71449a6	50	?T:arg argn symbol config_arg0 config_args config_argc xxx yyy zzz uuu
d4b0fb96	51	?T:args_exp args_sep arg_exp libswanted
875282d6	52	?F:./optdef.sh ./cmdline.opt ./posthint.sh ./cmdl.opt
959f3c4c JH	53
	54	: Save command line options in file UU/cmdline.opt for later use in
	55	: generating config.sh.
	56	?X: This temporary file will be read by Oldsym.U. I used a temporary
	57	?X: file to preserve all sorts of potential command line quotes and
	58	?X: also because we don't know in advance how many variables we'll
	59	?X: need, so I can't actually declare them on the MAKE line.
	60	?X: The config_args variable won't be quite correct if Configure is
	61	?X: fed something like ./Configure -Dcc="gcc -B/usr/ccs/bin/"
	62	?X: since the quotes are gone by the time we see them. You'd have to
	63	?X: reconstruct the command line from the config_arg? lines, but since
	64	?X: I don't imagine anyone actually having to do that, I'm not going
	65	?X: to worry too much.
	66	cat > cmdline.opt <<EOSH
	67	# Configure command line arguments.
	68	config_arg0='$0'
	69	config_args='$*'
	70	config_argc=$#
	71	EOSH
	72	argn=1
875282d6 JH	73	args_exp=''
875282d6 JH	74	args_sep=''
959f3c4c JH	75	for arg in "$@"; do
	76	cat >>cmdline.opt <<EOSH
	77	config_arg$argn='$arg'
	78	EOSH
875282d6 JH	79	# Extreme backslashitis: replace each ' by '"'"'
	80	cat <<EOC \| sed -e "s/'/'"'"'"'"'"'"'/g" > cmdl.opt
	81	$arg
	82	EOC
	83	arg_exp=`cat cmdl.opt`
	84	args_exp="$args_exp$args_sep'$arg_exp'"
959f3c4c	85	argn=`expr $argn + 1`
875282d6	86	args_sep=' '
959f3c4c	87	done
875282d6 JH	88	# args_exp is good for restarting self: eval "set X $args_exp"; shift; $0 "$@"
	89	# used by ./hints/os2.sh
	90	rm -f cmdl.opt
959f3c4c JH	91
	92	: produce awk script to parse command line options
	93	cat >options.awk <<'EOF'
	94	BEGIN {
c71449a6	95	optstr = "A:dD:eEf:hKOrsSU:V"; # getopt-style specification
959f3c4c JH	96
	97	len = length(optstr);
	98	for (i = 1; i <= len; i++) {
	99	c = substr(optstr, i, 1);
	100	?X: some older awk's do not have the C ?: construct
	101	if (i < len) a = substr(optstr, i + 1, 1); else a = "";
	102	if (a == ":") {
	103	arg[c] = 1;
	104	i++;
	105	}
	106	opt[c] = 1;
	107	}
	108	}
	109	{
	110	expect = 0;
	111	str = $0;
	112	if (substr(str, 1, 1) != "-") {
	113	printf("'%s'\n", str);
	114	next;
	115	}
	116	len = length($0);
	117	for (i = 2; i <= len; i++) {
	118	c = substr(str, i, 1);
	119	if (!opt[c]) {
	120	printf("-%s\n", substr(str, i));
	121	next;
	122	}
	123	printf("-%s\n", c);
	124	if (arg[c]) {
	125	if (i < len)
	126	printf("'%s'\n", substr(str, i + 1));
	127	else
	128	expect = 1;
	129	next;
	130	}
	131	}
	132	}
	133	END {
	134	if (expect)
	135	print "?";
	136	}
	137	EOF
	138
	139	: process the command line options
	140	?X: Use "$@" to keep arguments with spaces in them from being split apart.
	141	?X: For the same reason, awk will output quoted arguments and the final eval
	142	?X: removes them and sets a proper $* array. An 'X' is prependend to each
	143	?X: argument before being fed to echo to guard against 'echo -x', where -x
	144	?X: would be understood as an echo option! It is removed before feeding awk.
	145	set X `for arg in "$@"; do echo "X$arg"; done \|
	146	sed -e s/X// \| awk -f options.awk`
	147	eval "set $*"
	148	shift
	149	rm -f options.awk
	150
	151	: set up default values
	152	fastread=''
	153	reuseval=false
	154	config_sh=''
	155	alldone=''
	156	error=''
	157	silent=''
	158	extractsh=''
	159	override=''
160	knowitall=''
c71449a6	161	rm -f optdef.sh posthint.sh
959f3c4c JH	162	cat >optdef.sh <<EOS
	163	$startsh
	164	EOS
	165
	166	?X:
	167	?X: Given that we now have the possibility to execute Configure remotely
	168	?X: thanks to the new src.U support, we have to face the possibility
	169	?X: of having to ask where the source lie, which means we need the Myread.U
	170	?X: stuff and possibly other things that might echo something on the
	171	?X: screen...
	172	?X:
	173	?X: That's not pretty, and might be confusing in 99% of the time. So...
	174	?X: We introduce a new realsilent variable which is set when -s is given,
	175	?X: and we force silent=true if -S is supplied. The Extractall.U unit
	176	?X: will then undo the >&4 redirection based on the value of the
	177	?X: realsilent variable... -- RAM, 18/93/96
	178	?X:
	179
	180	: option parsing
	181	while test $# -gt 0; do
	182	case "$1" in
	183	-d) shift; fastread=yes;;
	184	-e) shift; alldone=cont;;
	185	-f)
	186	shift
	187	cd ..
	188	if test -r "$1"; then
	189	config_sh="$1"
	190	else
	191	echo "$me: cannot read config file $1." >&2
	192	error=true
	193	fi
	194	cd UU
	195	shift;;
d4b0fb96	196	--help\|\
959f3c4c JH	197	-h) shift; error=true;;
	198	-r) shift; reuseval=true;;
	199	-s) shift; silent=true; realsilent=true;;
	200	-E) shift; alldone=exit;;
	201	-K) shift; knowitall=true;;
	202	-O) shift; override=true;;
	203	-S) shift; silent=true; extractsh=true;;
	204	-D)
	205	shift
	206	case "$1" in
	207	*=)
	208	echo "$me: use '-U symbol=', not '-D symbol='." >&2
	209	echo "$me: ignoring -D $1" >&2
	210	;;
	211	=) echo "$1" \| \
	212	sed -e "s/'/'\"'\"'/g" -e "s/=\(.*\)/='\1'/" >> optdef.sh;;
	213	*) echo "$1='define'" >> optdef.sh;;
	214	esac
	215	shift
	216	;;
	217	-U)
	218	shift
	219	case "$1" in
	220	*=) echo "$1" >> optdef.sh;;
	221	=)
	222	echo "$me: use '-D symbol=val', not '-U symbol=val'." >&2
	223	echo "$me: ignoring -U $1" >&2
	224	;;
	225	*) echo "$1='undef'" >> optdef.sh;;
	226	esac
	227	shift
	228	;;
c71449a6 JH	229	-A)
	230	shift
	231	xxx=''
	232	yyy="$1"
c71449a6	233	zzz=''
2256e445	234	uuu=undef
c71449a6	235	case "$yyy" in
e36eeeff	236	=) zzz=`echo "$yyy"\|sed 's!=.*!!'`
2256e445 JH	237	case "$zzz" in
	238	:) zzz='' ;;
	239	*) xxx=append
e36eeeff JH	240	zzz=" "`echo "$yyy"\|sed 's!^[^=]*=!!'`
e36eeeff JH	241	yyy=`echo "$yyy"\|sed 's!=.*!!'` ;;
2256e445 JH	242	esac
	243	;;
	244	esac
	245	case "$xxx" in
	246	'') case "$yyy" in
e36eeeff JH	247	:) xxx=`echo "$yyy"\|sed 's!:.*!!'`
	248	yyy=`echo "$yyy"\|sed 's!^[^:]*:!!'`
	249	zzz=`echo "$yyy"\|sed 's!^[^=]*=!!'`
	250	yyy=`echo "$yyy"\|sed 's!=.*!!'` ;;
	251	) xxx=`echo "$yyy"\|sed 's!:.!!'`
	252	yyy=`echo "$yyy"\|sed 's!^[^:]*:!!'` ;;
2256e445 JH	253	esac
	254	;;
	255	esac
c71449a6 JH	256	case "$xxx" in
c71449a6 JH	257	append)
2256e445	258	echo "$yyy=\"\${$yyy}$zzz\"" >> posthint.sh ;;
c71449a6	259	clear)
2256e445	260	echo "$yyy=''" >> posthint.sh ;;
c71449a6 JH	261	define)
	262	case "$zzz" in
	263	'') zzz=define ;;
	264	esac
2256e445	265	echo "$yyy='$zzz'" >> posthint.sh ;;
c71449a6	266	eval)
2256e445	267	echo "eval \"$yyy=$zzz\"" >> posthint.sh ;;
c71449a6	268	prepend)
2256e445	269	echo "$yyy=\"$zzz\${$yyy}\"" >> posthint.sh ;;
c71449a6 JH	270	undef)
	271	case "$zzz" in
	272	'') zzz="$uuu" ;;
	273	esac
2256e445 JH	274	echo "$yyy=$zzz" >> posthint.sh ;;
2256e445 JH	275	*) echo "$me: unknown -A command '$xxx', ignoring -A $1" >&2 ;;
c71449a6	276	esac
91985011	277	shift
c71449a6	278	;;
959f3c4c	279	-V) echo "$me generated by metaconfig <VERSION> PL<PATCHLEVEL>." >&2
2256e445	280	exit 0;;
959f3c4c JH	281	--) break;;
	282	-*) echo "$me: unknown option $1" >&2; shift; error=true;;
	283	*) break;;
	284	esac
	285	done
	286
	287	case "$error" in
	288	true)
	289	cat >&2 <<EOM
	290	Usage: $me [-dehrsEKOSV] [-f config.sh] [-D symbol] [-D symbol=value]
c71449a6	291	[-U symbol] [-U symbol=] [-A command:symbol...]
959f3c4c JH	292	-d : use defaults for all answers.
	293	-e : go on without questioning past the production of config.sh.
	294	-f : specify an alternate default configuration file.
	295	-h : print this help message and exit (with an error status).
	296	-r : reuse C symbols value if possible (skips costly nm extraction).
	297	-s : silent mode, only echoes questions and essential information.
	298	-D : define symbol to have some value:
	299	-D symbol symbol gets the value 'define'
	300	-D symbol=value symbol gets the value 'value'
d4b0fb96 MB	301	common used examples (see INSTALL for more info):
d4b0fb96 MB	302	-Duse64bitint use 64bit integers
234cf2bf	303	-Duse64bitall use 64bit integers and pointers
d4b0fb96	304	-Dusethreads use thread support
234cf2bf	305	-Dinc_version_list=none do not include older perl trees in @INC
d4b0fb96 MB	306	-DEBUGGING=none DEBUGGING options
	307	-Dcc=gcc choose your compiler
	308	-Dprefix=/opt/perl5 choose your destination
959f3c4c JH	309	-E : stop at the end of questions, after having produced config.sh.
	310	-K : do not use unless you know what you are doing.
	311	-O : let -D and -U override definitions from loaded configuration file.
	312	-S : perform variable substitutions on all .SH files (can mix with -f)
	313	-U : undefine symbol:
	314	-U symbol symbol gets the value 'undef'
	315	-U symbol= symbol gets completely empty
d4b0fb96	316	e.g.: -Uversiononly
c71449a6	317	-A : manipulate symbol after the platform specific hints have been applied:
2256e445	318	-A symbol=value append " "value to symbol
c71449a6 JH	319	-A append:symbol=value append value to symbol
c71449a6 JH	320	-A define:symbol=value define symbol to have value
c71449a6 JH	321	-A clear:symbol define symbol to be ''
	322	-A define:symbol define symbol to be 'define'
	323	-A eval:symbol=value define symbol to be eval of value
	324	-A prepend:symbol=value prepend value to symbol
	325	-A undef:symbol define symbol to be 'undef'
	326	-A undef:symbol= define symbol to be ''
d4b0fb96	327	e.g.: -A prepend:libswanted='cl pthread '
959f3c4c JH	328	-V : print version number and exit (with a zero status).
	329	EOM
	330	exit 1
	331	;;
	332	esac
	333
	334	?X:
e02148a3 GS	335	?X: Unless they specified either -S or both -d and -e/E, make sure we're
	336	?X: running interactively, i.e. attached to a terminal. Moved from Head.U to
	337	?X: be able to handle batch configurations...
959f3c4c JH	338	?X:
	339	?X: We have to hardwire the Configure name and cannot use $me, since if they
	340	?X: said 'sh <Configure', then $me is 'sh'...
	341	?X:
	342	: Sanity checks
	343	case "$fastread$alldone" in
	344	yescont\|yesexit) ;;
	345	*)
e02148a3 GS	346	case "$extractsh" in
	347	true) ;;
	348	*)
	349	if test ! -t 0; then
	350	echo "Say 'sh Configure', not 'sh <Configure'"
	351	exit 1
	352	fi
	353	;;
	354	esac
959f3c4c JH	355	;;
	356	esac
	357
	358	?X: In silent mode, the standard output is closed. Questions are asked by
	359	?X: outputing on file descriptor #4, which is the original stdout descriptor.
	360	?X: This filters out all the "junk", since all the needed information is written
	361	?X: on #4. Note that ksh will not let us redirect output if the file descriptor
	362	?X: has not be defined yet, unlike sh, hence the following line...--RAM.
	363	exec 4>&1
	364	case "$silent" in
	365	true) exec 1>/dev/null;;
	366	esac
	367
	368	: run the defines and the undefines, if any, but leave the file out there...
	369	touch optdef.sh
	370	. ./optdef.sh
c71449a6 JH	371	: create the posthint manipulation script and leave the file out there...
c71449a6 JH	372	touch posthint.sh
959f3c4c	373