Porting Microsoft Windows* OS Code to Linux* OS or OS X*

You can use the -fms-dialect option to port Windows* OS code to Linux* OS or OS X*. This option enables support for a language dialect that is compatible with Microsoft Windows* OS, while maintaining link compatibility with gcc. It allows portability of code written on Windows that uses Microsoft extensions or language features.

For the 13.0 release on OS X* systems, this option is deprecated.