Is there a way to select all .c newer than .o ?

[bamanzi]

Hi, I'm wondering is there a way to select all .o files that is older than .c? And all .c without correspdong .o?

Another case: select all .el files newer than .elc & all .el without corresponding .elc? I need by (re-)byte-compile them.

I saw xplorer2 has such feature: Checking file transformations.
Image: http://zabkat.com/snap/make.png
How can I achieve the same gold in the power of Total Commander?

[Vochomurka]

Try the misc plugon by Lefteous. It has very interesting function "sibling" that seems to do exactly what you need.