I don't how Perl could possibly do that. If I use

my $gcov_tool   = 'gcov';
my $da_filename = 'c:/path/to/file.gcda';
my $object_dir  = 'relative/path/to/source';

$gcov_error = system_no_output(0, 'echo', $gcov_tool, $da_filename, "-
+o", 
$object_dir, "-b");
[download]

I get

gcov c:/path/to/file.gcda -o relative/path/to/source -b
[download]