: check that the script is started from the "first" directory
p=`pwd`
case `basename $p` in
first)
	;;
*)
	echo "this script must be started from the 'first' directory"
	exit 3
	;;
esac
: check $PATH first
if sh ckpath
then :
else
	exit 1
fi
: check write-ability of /tmp and /usr/tmp
if ( >/usr/tmp/aaax.$$ )
then
	rm /usr/tmp/aaax.$$
else
	echo /usr/tmp must exist and be writable.
	exit 2
fi
if ( >/tmp/aaax.$$ )
then
	rm /tmp/aaax.$$
else
	echo /tmp must exist and be writable.
	exit 2
fi
: set ACK HOME Directory in ../h/em_path.h
rm -f em_path.h
sed -e "/^#define[ 	]*EM_DIR/s@\".*\"@\"`cd .. ; pwd`\"@" <../h/em_path.h >em_path.h
if cmp ../h/em_path.h em_path.h >/dev/null 2>&1
then
	: Don't touch ../h/em_path.h, it's already correct
else
	rm -f ../h/em_path.h
	if mv em_path.h ../h >/dev/null 2>&1
	then : success
	else
		echo "Sorry, can't replace ../h/em_path.h"
		exit 7
	fi
fi
: translate myecho
if cc -o myecho myecho.c > /dev/null 2>&1
then
	:
else
	echo "Sorry, cc does not seem to work"
	exit 8
fi
: find cc option for lex library
if fixlexlib
then
	:
else
	exit 9
fi
: remove non-system as and ld from descr files
if (ack_sys) >/dev/null 2>&1
then
	: echo Your system is: `ack_sys`.
else
	myecho -n "Give me the type of your system, the current choice is:
pdp_v7		PDP11 with sep I/D and version 7 (or BSD 2.8, 2.9)
vax_bsd4_1a	VAX11 with BSD4.1a
vax_bsd4_2	VAX11 with BSD4.2
vax_sysV_2	VAX11 with System V.2
pc_ix		IBM PC with PC/IX
xenix3		IBM AT running Microsoft Xenix V3.2
m68_unisoft	Motorola 68000 with Unisoft UNIX
sun3		Sun 3 M68020 workstation 
sun2		Sun 2 M68000 workstation
m68_sysV_0	Motorola 68000 with Uniplus System V.0 Unix
m68020		Motorola M68020 VME131 running Unix System V/68 R2V2.1
ANY		Neither of the above

system type: "
	if read SYSNAME
	then
		echo echo "$SYSNAME" >../bin/ack_sys
		chmod +x ../bin/ack_sys
		case `ack_sys` in
		pdp_v7|vax_bsd4_1a|vax_bsd4_2|vax_sysV_2|pc_ix|m68_unisoft|sun3|sun2|m68_sysV_0|xenix3|m68020) ;;
		*)	echo None of the software especially intended for the named systems will work ;;
		esac
	else
		echo Sorry, got EOF when reading system name.
		exit 10
	fi
fi
myecho -n "Your system is `ack_sys`, are you satisfied with that? (y/n) "
if read YESNO
then
	case $YESNO in
	j*|y*)	;;
	n*)	echo Ok, I will give you another chance....
		rm -f ../bin/ack_sys
		exec sh $0
		;;
	*)	echo "I do not understand your answer ($YESNO). Bye"
		exit 11
		;;
	esac
else
	echo Sorry, got EOF when reading your answer.
	exit 12
fi
: "Take action according to the system used"
: 'Prevent the use of the system assembler on for certain systems'
: 'prevent the use of ranlib on pdp 11s'
case `ack_sys` in
pdp_*)		RMD="vax4"
		echo 'echo "no ranlib on this system"; exit 93' > ../bin/ranlib
		chmod +x ../bin/ranlib
		ranlib > /dev/null 2>&1
		case X$? in
		X93)	;;
		*)	echo "Sorry, there still is an error in your PATH."
			echo "It finds the system ranlib before ours, which is in the ACK bin directory."
			exit 13
		esac
		;;
*)		RMD="vax4" ;;
esac
for i in $RMD
do
(	cd ../lib/$i
	if grep '^name as$' descr >/dev/null 2>&1
	then
	cp descr descr.orig
ed - descr <<'ABC'
/^name as$/;/^end$/d
/^name ld$/;/^end$/d
w
q
ABC
	fi
)
done
case `ack_sys` in
vax_bsd4_2)	( cd ../lib/vax4
		  cp descr descr.orig
		  ed - descr <<'ABC'
/CPP_F/s/$/ -D__BSD4_2/
w
q
ABC
		)
		;;
vax_sysV_2)	( cd ../lib/vax4
		  cp descr descr.orig
		  ed - descr <<'ABC'
/CPP_F/s/$/ -D__USG/
w
q
ABC
		)
		;;
esac
: 'Set the default machine in ../h/local.h'
BM=1
case `ack_sys` in
pdp_v7)		ACM=pdp ; BM=0 ;;
vax_bsd4_1a)    ACM=vax4 ;;
vax_bsd4_2)	ACM=vax4 ;;
vax_sysV_2)	ACM=vax4 ;;
pc_ix)		ACM=i86 ; BM=0;;
xenix3)		ACM=xenix3 ; BM=0;;
sun3)		ACM=sun3 ;;
sun2)		ACM=sun2 ;;
m68_unisoft)	ACM=m68k2 ;;
m68_sysV_0)	ACM=mantra ;;
m68020)		ACM=m68020 ;;
*)		ACM=m68k2 ;;
esac
rm -f local.h
sed -e /ACKM/s/'".*"'/'"'$ACM'"'/ -e /BIGMACH/s/'[01]'/$BM/ < ../h/local.h >local.h
if cmp -s ../h/local.h local.h
then :
else
	cp local.h ../h
	rm -f local.h
fi
echo "Your default machine to compile for is $ACM"
case `ack_sys` in
vax_bsd4_2)	
	( cd ../mach/vax4
	  echo "Copying mach/vax4/libbsd4_2 to mach/vax4/libsys"
	  mkdir libsys > /dev/null 2>&1
	  rm -f libsys/*
	  cp libbsd4_2/* libsys
	)
	;;
vax_bsd4_1a)	
	( cd ../mach/vax4
	  echo "Copying mach/vax4/libbsd4_1a to mach/vax4/libsys"
	  mkdir libsys > /dev/null 2>&1
	  rm -f libsys/*
	  cp libbsd4_1a/* libsys
	)
	;;
vax_sysV_2)
	( cd ../mach/vax4 
	  echo "Copying mach/vax4/libsysV_2 to mach/vax4/libsys"
	  mkdir libsys > /dev/null 2>&1
	  rm -f libsys/*
	  cp libsysV_2/* libsys
	)
	;;
esac
case X$BM in
X0)
	( cd ../lang/cem/cemcom
	  cp SmallPars Parameters
	  cd ../../../lib/descr
	  cp fe fe.orig
	  ed - fe << ABC
/em_cemcom/i
	prep always
.
/CPP_F/;.+2d
/CPP_F/;.+2d
w
q
ABC
	)
	for i in ../mach/vax4/cg ../mach/m68k2/cg ../mach/m68020/ncg
	do
	( cd $i
	  cp tables1.c tables.c
	  cp tables1.h tables.h
	)
	done
	( cd ../modules/src/malloc
	  cp param.h param.h.orig
	  ed - param.h <<ABC
/STORE/s/define/undef/
w
q
ABC
	)
	( cd ../lang/m2/comp
	  cp SmallPars Parameters
	  cp Makefile Makefile.orig
	  ed - Makefile <<ABC
/MALLOC/s/=/=#/
w
q
ABC
	)
	;;
*)	( cd ../lang/cem/cemcom
	  cp BigPars Parameters
	  cd ../../m2/comp
	  cp BigPars Parameters
	)
	;;
esac

: find varargs include file
: if not present use our own

if [ -f /usr/include/varargs.h ]
then
	:
else
	cp ../include/_tail_cc/varargs.h ../modules/h
fi