: 'Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1984, 1985.'

echo "Configuration questions for the B system."

: 'Determine if echo -n works'
echo -n "bleep" >.bleep
if grep n .bleep >/dev/null 2>&1
then
	n=""
else
	n="-n"
fi
rm -f .bleep

: 'What machine?'
echo " "
echo $n "Figuring out what machine you have "
echo $n "..."
cat >machine.c <<EOF
#include <stdio.h>
main() {
#ifdef vax
	printf("vax\n");
#else
#ifdef pdp
	printf("pdp\n");
#else
#ifdef PDP
	printf("pdp\n");
#else
	printf("other\n");
#endif
#endif
#endif
}
EOF
cc machine.c -o machine
machine=`machine`
rm -f machine*
echo " "
case $machine in
vax)
	echo "This machine appears to be a VAX."
	echo $n "Is this true? "
	read ans
	case $ans in
	n*|N*|f*|F*)	machine="other"
		;;
	*)	bint="bint"
		;;
	esac
	;;
pdp)
	echo "This machine appears to be a PDP."
	echo $n "Is this true? "
	read ans
	case $ans in
	n*|N*|f*|F*)	machine="other"
		;;
	*)	bint="bsmall"
		;;
	esac
	;;
esac
case $machine in
other)
	echo "Your machine does not appear to be a VAX or PDP."
	echo $n "Is this a small machine (less than 190K code space)? "
	read ans
	case $ans in
	y*|Y*)	bint="bsmall"
		;;
	*)	bint="bint"
		;;
	esac
	echo " "
	echo "Since your machine may not be a VAX or PDP, you might have to edit"
	echo "the configuration file for the B interpreter '$bint'."
	echo "Check the remarks in b0con.h and README in ./src/$bint."
	;;
esac

case $bint in
"bsmall")
	echo " "
	echo "Since you have a small system, we can only use the old"
	echo "version of the B interpreter, named $bint."
	echo "See the file ./src/bsmall/README for details."
	echo " "
	echo "The B editor is too big in its full glory."
	echo "Therefore all kinds of features will be turned off in an"
	echo "attempt to make it fit."
	echo "See ./src/bed/feat.h for details."
	;;
esac

: 'What unix?'
echo " "
echo $n "Finding out about your brand of unix "
echo $n "..."
cat >unix.c <<EOF
#include <stdio.h>
#include <signal.h>
main() {
#ifdef SIGCHLD
#ifdef SIGVTALRM
	printf("BSD4_2\n");
#else
	printf("BSD\n");
#endif
#else
#ifdef SIGCLD
	printf("ATT\n");
#else
	printf("unknown\n"); /* Version 7 we hope ... */
#endif
#endif
}
EOF
cc unix.c -o unix
unix=`unix`
rm -f unix*

echo " "
case $unix in
BSD4_2)
	echo "You appear to be running Berkeley's BSD unix, version 4.2 (or later)."
	echo $n "Is this true? "
	read ans
	case $ans in
	n*|N*|f*|F*)	unix="unknown";;
	esac
	;;
BSD)
	echo "You appear to be running Berkeley's BSD unix."
	echo $n "Is this true? "
	read ans
	case $ans in
	n*|N*|f*|F*)	unix="unknown";;
	esac
	;;
ATT)
	echo "You appear to be running ATT's System III or System V unix."
	echo $n "Is this true? "
	read ans
	case $ans in
	n*|N*|f*|F*)	unix="unknown";;
	esac
	;;
esac

case $machine in
pdp|other)
	case $unix in
	unknown)
		echo $n "Are you running PWB Unix? "
		read ans
		case $ans in
		y*|Y*)	unix="PWB";;
		esac
		;;
	esac
esac

case $unix in
unknown)
	echo " "
	echo "We cannot find out what type of unix you are running."
	echo "See ./src/bed/unix.h, ./src/bed/feat.h, /src/$bint/README"
	echo "and ./src/$bint/b0con.h in case of problems."
	;;
esac

: 'Floating point arithmetic ok?'
echo " "
cat >float.c <<EOF
#include <stdio.h>
double dadd(a, b) double a, b; {
	return a+b;
}
main() {
	double a, b, c;
	double dadd();
	a = 3.14;
	b = 2.7 * a;
	c = dadd(a, b);
	exit(0);
}
EOF
cc -O float.c -o float >/dev/null 2>&1
if sh 2>/dev/null <<EOF
	if float
	then exit 0
	else exit 1
	fi
EOF
then
	echo "Your floating point seems to be alright."
	fflag=""
else
	echo "Your C compiler seems to need a special flag for"
	echo "loading (probably software) floating point routines."
	echo $n "What flag is needed (default -f) "
	read fflag
	case $fflag in
	'')	fflag="-f";;
	esac
	cc -O $fflag float.c -o float >/dev/null 2>&1
	until sh 2>/dev/null <<EOF
		if float
		then exit 0
		else exit 1
		fi
EOF
	do
		echo "This flag doesn't seem to work."
		echo "Try again (default -f) "
		read fflag
		case $fflag in
		'')	fflag="-f";;
		esac
		cc -O $fflag float.c -o float >/dev/null 2>&1
	done
fi
rm -f float* core

: 'termio system?'
if test -r /usr/include/termio.h
then
	termio="yes"
	echo " "
	echo "Termio.h found."
else
	termio="no"
	if test ! -r /usr/include/sgtty.h
	then
		echo " "
		echo "Neither termio.h nor sgtty.h found."
		echo "See ./src/bed/unix.h in case of problems."
	fi
fi

: 'termcap library for B editor'
echo " "
echo $n "Searching for your termcap-like library routines "
echo $n "... "
if test -r /lib/libtermcap.a -o -r /usr/lib/libtermcap.a
then
	termlib="-ltermcap"
	echo "termcap library found."
elif test -r /usr/local/lib/libtermcap.a
then
	termlib="/usr/local/lib/libtermcap.a"
	echo "local termcap library found."
elif test -r /lib/libtermlib.a -o -r /usr/lib/libtermlib.a
then
	termlib="-ltermlib"
	echo "termlib library found."
elif test -r /usr/local/lib/libtermlib.a
then
	termlib="/usr/local/lib/libtermlib.a"
	echo "local termlib library found."
elif test -r /lib/libcurses.a -o -r /usr/lib/libcurses.a
then
	termlib="-lcurses"
	echo "terminfo library found."
elif test -r /usr/local/lib/libcurses.a
then
	termlib="/usr/local/lib/libcurses.a"
	echo "local terminfo library found."
else
	: 'changed for 4.3 BSD release'
	termlib="ask_it"
fi
while test "$termlib" = "ask_it" -o "$termlib" = "try_again"; do
	case $termlib in
	ask_it)
		echo " "
		echo "Please specify where the termcap-like routines are kept"
		echo $n " (either full pathname or -lxxx option) "
		;;
	try_again)
		echo $n "Please try again (full pathname or -lyyy option) "
		;;
	esac
	read termlib
	case $termlib in
	-l*)
		echo "Hope $termlib will do the job."
		;;
	/*)
		if test -r $termlib
		then
			echo "Ok, we will try that one."
		else
			echo "$termlib does not appear to exist."
			termlib="try_again"
		fi
		;;
	*)
		echo "$termlib is not a valid library specification."
		termlib="try_again"
		;;
	esac
done

: 'termcap database, commented out for 4.3 BSD'
#echo " "
#if test -r /etc/termcap
#then
#	termcap="yes"
#	echo "Termcap database found."
#else
#	termcap="no"
#	echo "No termcap database found; we will install our own, to be used"
#	echo "when your TERMCAP environment variable is not set."
#fi


: 'Shall we make B public?'
public="no"
echo " "
echo $n "Will you want to make B publically available? "
read ans
case $ans in
y*|Y*)
public="yes"
if test -r answers
then
	. answers
else
	bdef="/usr/new"
	libdef="/usr/new/lib/B"
	man1def="/usr/man/mann"
	man5def="/usr/man/mann"
fi
bdir='blurfl'
while test ! -d "$bdir" ; do
	case $bdir in
	blurfl)
		echo " "
		echo "Please type the full pathname of a directory"
		echo "in which you have write permission,"
		echo "and where you want the 'b' command file installed"
		echo $n " (default $bdef) "
		;;
	*) 	echo "$bdir does not appear to exist."
		echo $n "Are you sure you typed the right name? "
		read ans
		case $ans in
		y*|Y*)	echo "Don't forget to make $bdir before 'make install'."
			break
			;;
		*)	echo " "
			echo $n "Please try again (default $bdef) "
			;;
		esac
		;;
	esac
	read bdir
	case $bdir in
	"") bdir=$bdef;;
	esac
done
libdir='blurfl'
while test ! -d "$libdir" ; do
	case $libdir in
	blurfl)
		echo " "
		echo "Please type the full pathname of the directory"
		echo "where you want to install the auxiliary binaries"
		echo "and datafiles needed by the B system"
		echo $n " (default $libdef) "
		;;
	*) 	echo "$libdir does not appear to exist."
		echo $n "Are you sure you typed the right name? "
		read ans
		case $ans in
		*|Y*)	echo "Don't forget to make $libdir before 'make install'."
			break
			;;
		*)	echo " "
			echo $n "Please try again (default $libdef) "
			;;
		esac
		;;
	esac
	read libdir
	case $libdir in
	"") libdir=$libdef;;
	esac
done
man1dir='blurfl'
while test ! -d "$man1dir" ; do
	case $man1dir in
	blurfl)
		echo " "
		echo "Please type the full pathname of the directory"
		echo "where you want to install the 'b.1' manual page"
		echo $n " (default $man1def) "
		;;
	*) 	echo "$man1dir does not appear to exist."
		echo $n "Are you sure you typed the right name? "
		read ans
		case $ans in
		y*|Y*)	echo "Don't forget to make $man1dir before 'make install'."
			break
			;;
		*)	echo " "
			echo $n "Please try again (default $man1def) "
			;;
		esac
		;;
	esac
	read man1dir
	case $man1dir in
	"") man1dir=$man1def;;
	esac
done
man5dir='blurfl'
while test ! -d "$man5dir" ; do
	case $man5dir in
	blurfl)
		echo " "
		echo "Please type the full pathname of the directory"
		echo "where you want to install the 'bterminal.5' manual page"
		echo $n " (default $man5def) "
		;;
	*) 	echo "$man5dir does not appear to exist."
		echo $n "Are you sure you typed the right name? "
		read ans
		case $ans in
		y*|Y*)	echo "Don't forget to make $man5dir before 'make install'."
			break
			;;
		*)	echo " "
			echo $n "Please try again (default $man5def) "
			;;
		esac
		echo $n "Please try again "
		;;
	esac
	read man5dir
	case $man5dir in
	"") man5dir=$man5def;;
	esac
done

cat >answers <<EOF
bdef="$bdir"
libdef="$libdir"
man1def="$man1dir"
man5def="$man5dir"
EOF
;;
esac
echo " "
echo "End of configuration questions for the B system."

: 'Getting generic copies of makefiles and shellfiles.'
: 'Since some tar_s leave the owner of the tape as the owner of the files'
: 'this will make sure the edit scripts will not fail.'

makefiles="./Makefile src/b/Makefile src/bed/Makefile src/bint/Makefile src/bsmall/Makefile"
shellfiles="src/b/b.sh src/b/b_p.sh"

editor="ed -"

cat >mf.head <<EOF
# This file was generated and edited by the Setup command.
# To make lasting changes edit the file Makefile.gen and run Setup again.
# 
EOF
for f in $makefiles
do
	cat mf.head $f.gen >$f
	chmod 644 $f
done
rm -f mf.head

for f in $shellfiles
do
	cp $f.gen $f
	chmod 755 $f
done

echo " "
echo $n "Editing Appropriate files ... "

case $machine in
pdp)
	f=src/bed/Makefile
	$editor $f <<EOF
	/^LDFLAGS=/s?LDFLAGS=.*?LDFLAGS= -i?
	w
	q
EOF
	f=src/bsmall/Makefile
	$editor $f <<EOF
	/^LDFLAGS=/s?LDFLAGS=.*?LDFLAGS= -i?
	w
	q
EOF
	;;
esac

: 'Not all CFLAGS are used by all sources.'
: 'But for convenience and future use, we put them into all source Makefiles.'

cflags="-O $fflag -DNDEBUG"

for f in Makefile src/b/b.sh src/bed/Makefile
do
	$editor $f <<EOF
	/^BINT=/s?BINT=.*?BINT=$bint?
	w
	q
EOF
done

case $bint in
bsmall)
	f=Makefile
	$editor $f <<EOF
	/examples$/s?make .*examples?make smallexamples?
	w
	q
EOF
	cflags="$cflags -DSMALLSYS"
	;;
esac

case $unix in
BSD|BSD4_2|PWB)
	cflags="$cflags -D$unix"
	;;
ATT)
	cflags="$cflags -Dindex=strchr -Drindex=strrchr"
	;;
esac

case $termio in
yes)
	cflags="$cflags -DTERMIO"
	;;
esac

for f in src/b/Makefile src/bed/Makefile src/$bint/Makefile
do
	$editor $f <<EOF
	/^CFLAGS=/s?CFLAGS=.*?CFLAGS= $cflags?
	w
	q
EOF
done

case $termlib in
-l*|/*)
	f=src/bed/Makefile
	$editor $f <<EOF
	/^TERMLIB=/s?.*?TERMLIB= $termlib?
	/^OWNTLIB=/s?.*?OWNTLIB=?
	w
	q
EOF
	;;
libtermcap.a)
	f=src/bed/Makefile
	$editor $f <<EOF
	/^TERMLIB=/s?.*?TERMLIB=?
	/^OWNTLIB=/s?.*?OWNTLIB= libtermcap.a?
	w
	q
EOF
	;;
esac

#case $termcap in
#no)
#	f=src/b/Makefile
#	$editor $f <<"EOF"
#	/^install:/s?.*?install:	all ldest termcap?
#	w
#	q
#EOF
#	;;
#esac

case $public in
yes)
	f=Makefile
	$editor $f <<EOF
	/^BDIR=/s?BDIR=.*?BDIR=$bdir?
	/^MAN1DIR=/s?MAN1DIR=.*?MAN1DIR=$man1dir?
	/^MAN5DIR=/s?MAN5DIR=.*?MAN5DIR=$man5dir?
	/^LIBDIR=/s?LIBDIR=.*?LIBDIR=$libdir?
	w
	q
EOF
	;;
esac

echo "done."

echo " "
echo "This completes the setup of the B system."
echo "You can now try 'make all'."