kconfig/streamline-config.pl: Simplify backslash line concatination

Simplify the way lines ending with backslashes (continuation) in Makefiles
is parsed. This is needed to implement a necessary fix.
Tested-by: NThomas Lange <thomas-lange2@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

scripts/kconfig/streamline_config.pl

@@ -253,17 +253,22 @@ if ($kconfig) {
 # Read all Makefiles to map the configs to the objects
 foreach my $makefile (@makefiles) {
 
-    my $cont = 0;
+    my $line = "";
 
     open(MIN,$makefile) || die "Can't open $makefile";
     while (<MIN>) {
-	my $objs;
-
-	# is this a line after a line with a backslash?
-	if ($cont && /(\S.*)$/) {
-	    $objs = $1;
+	# if this line ends with a backslash, continue
+	chomp;
+	if (/^(.*)\\$/) {
+	    $line .= $1;
+	    next;
 	}
-	$cont = 0;
+
+	$line .= $_;
+	$_ = $line;
+	$line = "";
+
+	my $objs;
 
 	# collect objects after obj-$(CONFIG_FOO_BAR)
 	if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) {
@@ -271,12 +276,6 @@ foreach my $makefile (@makefiles) {
 	    $objs = $2;
 	}
 	if (defined($objs)) {
-	    # test if the line ends with a backslash
-	    if ($objs =~ m,(.*)\\$,) {
-		$objs = $1;
-		$cont = 1;
-	    }
-
 	    foreach my $obj (split /\s+/,$objs) {
 		$obj =~ s/-/_/g;
 		if ($obj =~ /(.*)\.o$/) {