#!/bin/sh
#
# Portions Copyright 2001 by Red Hat Inc.
#
# makedepend which uses 'gcc -M'
#
# $XFree86: xc/config/util/gccmdep.cpp,v 3.5.2.2 2001/02/26 16:49:45 dawes Exp $
#
# Based on mdepend.cpp and code supplied by Hongjiu Lu <hjl@nynexst.com>
#
# May 12, 2001 - Mike A. Harris <mharris@redhat.com>
# - Fixed tempfile vulnerabilities (Usage of $$ in tmp filenames)

TMPFILES=""

# Safely create a temporary file
create_tmpfile()
{
    mktemp "$1"
    if [ $? -ne 0 ];then
        echo "$0: Can't create temp file, exiting..."
# First remove any tempfiles we've created already
        remove_tmpfiles
        exit 1
    fi
    TMPFILES="$TMPFILES $1"
}

# Remove any existing temporary files we've created
remove_tmpfiles()
{
    for tfile in $TMPFILES
    do
        [ -e $tfile ] && rm -f $tfile
    done
}

trap "remove_tmpfiles; exit 1" 1 2 15
trap "remove_tmpfiles; exit 0" 1 2 13

CC="gcc"
RM="rm -f"
LN="ln -s"
MV="mv -f"

files=
makefile=
endmarker=
magic_string='# DO NOT DELETE'
append=n
args=
asmfiles=

while [ $# != 0 ]; do
    if [ "$endmarker"x != x -a "$endmarker" = "$1" ]; then
	endmarker=
    else
	case "$1" in
	    -D*|-I*|-U*)
		args="$args '$1'"
		;;
	    -g*|-O*)
		;;
	    *)
		if [ "$endmarker"x = x ]; then
		    case $1 in
# ignore these flags
			-w|-o|-cc)
			    shift
			    ;;
			-v)
			    ;;
			-s)
			    magic_string="$2"
			    shift
			    ;;
			-f*)
			    if [ "$1" = "-f-" ]; then
				makefile="-"
			    elif [ "$1" = "-f" ]; then
				makefile="$2"
				shift
			    else
                                makefile=${1#-f}
			    fi
			    ;;
			--*)
                            endmarker=${1#--}
                            endmarker=${endmarker:---}
			    ;;
			-a)
			    append=y
			    ;;
			-*)
			    echo "Unknown option '$1' ignored" 1>&2
			    ;;
			*)
			    files="$files $1"
			    ;;
		    esac
		fi
		;;
	esac
    fi
    shift
done

if [ x"$files" = x ]; then
# Nothing to do
    exit 0
fi

case "$makefile" in
    '')
	if [ -r makefile ]; then
	    makefile=makefile
	elif [ -r Makefile ]; then
	    makefile=Makefile
	else
	    echo 'no makefile or Makefile found' 1>&2
	    exit 1
	fi
	;;
esac

TMP=`create_tmpfile "${PWD}/gccmdep.XXXXXX"`
if [ X"$makefile" != X- ]; then
    if [ x"$append" = xn ]; then
        sed -e "/^$magic_string/,\$d" < $makefile >> $TMP
        echo "$magic_string" >> $TMP
    else
        cat $makefile >> $TMP
    fi
fi

# need to link .s files to .S
for i in $files; do
    case $i in
	*.s)
	    dir=`dirname $i`
	    base=`basename $i .s`
	    (cd $dir; $RM ${base}.S; $LN ${base}.s ${base}.S)
	    asmfiles="$asmfiles ${base}.S"
	    ;;
    esac
done

CMD="$CC -M $args `echo $files | sed -e 's,\.s$,\.S,g' -e 's,\.s ,\.S ,g'` | 	sed -e 's,\.S$,\.s,g' -e 's,\.S ,\.s ,g'"

if [ X"$makefile" != X- ]; then
    CMD="$CMD >> $TMP"
fi
eval $CMD
if [ X"$makefile" != X- ]; then
    $RM ${makefile}.bak
    $MV $makefile ${makefile}.bak
    $MV $TMP $makefile
fi

if [ x"$asmfiles" != x ]; then
    $RM $asmfiles
fi

remove_tmpfiles

exit 0
