Release Version from Windows to Linux

[2lights]

There are 'similar' posts available on my query,
BUT i'm not not wining

Created program on a windows platform, Program compiles and Runs perfectly
in Debug mode as well as Release version for windows(copied .dll files)

How do I create the application so it can Run on Linux Systems.
Help not sure the way forward

My task on hand is -> to compile an application to run on windows and a linux operating system

Way forward? ideas?

Regards