?RCS: $Id: mkdep.U,v 3.0.1.4 1997/02/28 16:13:07 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: mkdep.U,v $
?RCS: Revision 3.0.1.4  1997/02/28  16:13:07  ram
?RCS: patch61: replaced .o with $_o all over the place
?RCS:
?RCS: Revision 3.0.1.3  1994/10/29  16:25:02  ram
?RCS: patch36: added ?F: line for metalint file checking
?RCS:
?RCS: Revision 3.0.1.2  1994/01/24  14:15:12  ram
?RCS: patch16: cppflags is now an optional dependency
?RCS:
?RCS: Revision 3.0.1.1  1993/12/15  08:22:39  ram
?RCS: patch15: force zero exit status in all mkdep scripts
?RCS:
?RCS: Revision 3.0  1993/08/18  12:09:16  ram
?RCS: Baseline for dist 3.0 netwide release.
?RCS:
?X:
?X: This unit generates the script 'mkdep' in the top-level directory.
?X:	It is up to the makefile to use it for automatic dependencies
?X: generation (usage: 'mkdep [cppflags] -- *.c').
?X:
?MAKE:mkdep: spitshell startsh cpp +cppflags grep contains rm sed sort uniq \
	Getfile Oldconfig eunicefix cat +cc cppminus test _o
?MAKE:	-pick add $@ %<
?S:mkdep:
?S:	This variable holds the name of a command to generate makefile
?S:	dependencies on the standard output. It is the pathname of the
?S:	generated mkdep script.
?S:.
?F:mkdep
?T:IFS arg flags takeflags srcfile toplev filebase inc dir files file dep c
: find out how to generate dependencies
echo " "
echo "Checking how to generate makefile dependencies on your machine..." >&4
?X: We are in the UU directory
toplev=`cd ..;pwd`
$cat >dep.c <<'EOCP'
#include "dep.h"
EOCP
?X: Empty dep.h causes RIOS to barf
$cat >dep.h <<'EOCP'

EOCP
takeflags='flags=""
case "$@" in
*--*)
	for arg
	do
		shift
		case "$arg" in
		--) break;;
		*) flags="$flags $arg";;
		esac
	done;;
esac'
case "$mkdep" in
'')
	;;
*)
	if test -x "$mkdep" &&
		$mkdep dep.c >dep.out 2>/dev/null &&
		$contains "dep$_o:.*dep\.h" dep.out >/dev/null 2>&1
	then
		echo "$mkdep works."
	else
		mkdep=
	fi
esac

case "$mkdep" in
'')
?X: have to figure something out: Try cpp
?X: have to pass source names one by one to cpp...
	$spitshell > ../mkdep <<EOM
$startsh
$takeflags
for srcfile
do
	$cpp -M -I. $cppflags \$flags \$srcfile 2>/dev/null
done
exit 0
EOM
	mkdep=$toplev/mkdep
	chmod +x $mkdep
	$eunicefix $mkdep
	if $mkdep dep.c >dep.out 2>/dev/null &&
		$contains "dep$_o:.*dep\.h" dep.out >/dev/null 2>&1
	then
		echo "Looks like we can use $cpp -M."
	else
		mkdep=
	fi
	;;
esac

case "$mkdep" in
'')
?X: have to figure something out: on NeXT, use cc -MM
?X: have to pass source names one by one to cc...
	$spitshell > ../mkdep <<EOM
$startsh
$takeflags
for srcfile
do
	$cc -MM -I. $cppflags \$flags \$srcfile 2>/dev/null
done
exit 0
EOM
	mkdep=$toplev/mkdep
	chmod +x $mkdep
	$eunicefix $mkdep
	if $mkdep dep.c >dep.out 2>/dev/null &&
		$contains "dep$_o: dep.h" dep.out >/dev/null 2>&1
	then
		echo "Looks like we can use $cc -MM."
	else
		mkdep=
	fi
	;;
esac

case "$mkdep" in
'')
?X: still no luck -- try something fancier.
	$spitshell >../mkdep <<EOS
$startsh
$takeflags
for srcfile
do
	case "\$srcfile" in
	*.c) c='.c';;
	*.y) c='.y';;
	*.l) c='.l';;
	esac
	filebase=\`basename \$srcfile \$c\`
	<\$srcfile $cpp $cppminus $cppflags -I. \$flags 2>/dev/null | \\
	$sed -e '/^# *[0-9]/!d' \\
		-e 's/^.*"\(.*\)".*\$/'\$filebase'$_o: \1/' \\
		-e 's|: \./|: |' \\
		-e 's|: *$|: '\$srcfile'|' | \\
	$grep -v '^#' | $sort | $uniq
done
exit 0
EOS
	mkdep=$toplev/mkdep
	chmod +x $mkdep
	$eunicefix $mkdep
	if $mkdep dep.c >dep.out 2>/dev/null &&
		$contains "dep$_o:.*dep\.h" dep.out >/dev/null 2>&1
	then
		echo "A shell script using $cpp does the trick."
	else
		echo "$cpp doesn't seem to be any use at all."
		$spitshell >../mkdep <<EOS
$startsh
$takeflags
files="\$@"
set X \$flags
shift
inc='.'
while test \$# -gt 0
do
	case "\$1" in
	-I) 
		shift
		inc="\$inc:\$1"
		;;
	-I*)
		dir=\`echo \$1 | sed -e 's/^-I//'\`
		inc="\$inc:\$dir"
		;;
	esac
	shift
done
set X \$files
shift
trap "$rm -f /tmp/mkdep\$\$; exit 1" 1 2 3 15
for srcfile
do
	case "\$srcfile" in
	*.c) c='.c';;
	*.y) c='.y';;
	*.l) c='.l';;
	esac
	filebase=\`basename \$srcfile \$c\`
	echo \$filebase$_o: \$srcfile
	$grep '^#[  ]*include' \$srcfile /dev/null | \
	$sed -n -e 's/#[   ]*include[  ]*//' \\
		-e '/<\(.*\)>/ d' \\
		-e 's/:[^"]*"\([^"]*\)".*/: \1/' \\
		-e "s/\\.c:/$_o:/p" > /tmp/mkdep\$\$
?X: Deal with directories specified via -I requests to locate files
	IFS=': '
	while read file dep; do
		for dir in \$inc; do
			if $test -f "\$dir/\$dep"; then
				dep="\$dir/\$dep"
				break
			fi
		done
		echo "\$file: \$dep" | $sed -e 's,: \./,: ,'
	done </tmp/mkdep\$\$
	IFS=' '
	$rm -f /tmp/mkdep\$\$
done
exit 0
EOS
		mkdep=$toplev/mkdep
		chmod +x $mkdep
		$eunicefix $mkdep
		if $mkdep dep.c >dep.out 2>/dev/null &&
			$contains "dep$_o:.*dep\.h" dep.out >/dev/null 2>&1
		then
			cat << EOM

I can use a script with grep instead, but it will make some incorrect
dependencies, since it doesn't understand about conditional compilation.
Moreover, some dependencies may be missing, because scanning won't be
a recursive process.
If you have a program which generates makefile dependencies, you may want
to use it.  If not, you can use the script and edit the Makefile by hand
if you need to.
EOM
		else
			mkdep=
			cat << EOM

I can't seem to generate makefile dependencies at all!  Perhaps you have a
program that does?  If you don't, you might look at the mkdep script to
see if you can create one which works.
EOM
		fi
	fi
esac
dflt="$mkdep"
fn=f~/
rp="Name of program to make makefile dependencies?"
. ./getfile
mkdep="$ans"
$rm -f dep.c dep.h dep$_o dep.out