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Path: utzoo!mnetor!seismo!mimsy!chris
From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.unix.wizards
Subject: Re: RCS vs. SCCS and make
Message-ID: <7129@mimsy.UUCP>
Date: Thu, 18-Jun-87 18:05:26 EDT
Article-I.D.: mimsy.7129
Posted: Thu Jun 18 18:05:26 1987
Date-Received: Sun, 21-Jun-87 15:06:12 EDT
References: <41@esosun.UUCP> <20393@sun.uucp> <42@loki.esosun.UUCP> <392@rocksanne.UUCP>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 66

In article <392@rocksanne.UUCP> mayer@rocksanne.UUCP (Jim Mayer) writes:
>	-I|-o)
>		options="$options $1 ${2?No second argument for -I}"
>		shift; shift

The -I flag takes the include path without a space, i.e.,

    cc -I. -I../h foo.c

so this should be modified a bit.

>	object=`expr "$file" : "\(.*\)\..*"`.o
>	if test ".o" = "$object" 
>	then
>		object="$file.o"
>	fi
>	cc $options -E $file | sed -n -e "s/^# 1 \"\(.*\)\"\$/$object: \1/p"

This last fails if "$file" contains slashes:

    ... -I. -I../h ../gorp/foo.c

Here is the script I provide with the current ctex.  I avoided `cc
-E', assuming that the -E option may not exist in some `cc's.  It
should be obvious how to change this as appropriate for your system.
The dependency extraction scheme here is rather more complex, so
as to depend less upon whatever features are peculiar to the Reiser
cpp.  Whether it will be successful is another matter.

: getdep - get dependency lists.

: change ":" comments to "#" comments if your shell supports those;
: the result will run faster.

: find cpp
cpp=unknown
for where in /lib /usr/lib /bin /usr/bin; do
	if test -f $where/cpp; then cpp=$where/cpp; break; fi
done
if test $cpp = unknown; then
	echo "I cannot find cpp, sorry" 1>&2; exit 1
fi

: handle arguments
incl=
for i
do
	case "$i" in
	-I*)
		incl="$incl $i";;
	*)
		: assume source file
		: put '$dep' in front of dependencies
		dep=`echo "$i" | sed -e 's,/,\\\\/,g' -e 's/\.c$/.o/'`
		: Find includes, remove leading numerics, remove ./,
		: remove double quotes, and remove trailing numerics.
		: Sort that, discarding duplicates, and add '$dep'.
		$cpp $incl "$i" | grep "^#" |
		sed -e 's/# [0-9]* //' -e 's,"./,",' -e 's/"\(.*\)"/\1/' \
		    -e 's/ [ 0-9]*$//' |
		sort -u | sed -e "s/^/$dep: /";;
	esac
done
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
Domain:	chris@mimsy.umd.edu	Path:	seismo!mimsy!chris