# shell command, assuming there are not tons of files in file_path:

grep -h ^CQA_STATUS file_path/cqa_* > file_path/CQA_STATUS


# but if there are tons of files, do it like this:

find file_path -name 'cqa_*' | xargs grep -h ^CQA_STATUS > file_path/CQA_STATUS

# (update: added carets where needed)


##</code><code>##

open( O, ">", "file_path/CQA_STATUS" ) or die "CQA_STATUS: $!";

for my $file ( <file_path/cqa_*> )
{
    open( I, "<", $file ) or do { warn "$file: $!"; next };

    while (<I>) { # suppose we only want the first occurrence from each file
        if ( /^CQA_STATUS/ ) {
            print O;
            last;
        }
    }
    close I;
}
close O;