scripts: Enhance analyze_build a bit

From: Trent Piepho <xyzzy@speakeasy.org>

In one case a Kbuild file would do something like:
foo-objs := a.o b.o
foo-objs += c.o

analyze_build didn't understand that the second lines _adds_ c.o to the
objects that make up foo.ko.  It would think that foo.ko was made up of
only c.o.  Should be fixed now.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/v4l/scripts/analyze_build.pl b/v4l/scripts/analyze_build.pl
index 945377fa4..9a291a2e3 100755
--- a/v4l/scripts/analyze_build.pl
+++ b/v4l/scripts/analyze_build.pl
@@ -97,9 +97,15 @@ sub open_makefile($) {
 	    next;
 	}
 	if (/(\S+)-objs\s*([:+]?)=\s*(\S.*?)\s*$/) {
-	    print STDERR "Should use ':=' in $file:$.\n$_\n" if ($check && $2 ne ':');
 	    my @files = split(/\s+/, $3);
 	    map { s|^(.*)\.o$|$dir/\1| } @files;
+	    if ($2 eq '+') {
+		# Adding to files
+		print STDERR "Should use ':=' in $file:$.\n$_\n" if ($check && !exists $multi{"$dir/$1"});
+		push @files, @{$multi{"$dir/$1"}};
+	    } else {
+		print STDERR "Setting objects twice in $file:$.\n$_\n" if ($check && exists $multi{"$dir/$1"});
+	    }
 	    $multi{"$dir/$1"} = \@files;
 	    next;
 	}