After installing of Cygwin. In order to use it in C-Free, we need to do some simple configurations for this compiler.

Start C-Free, go to "Build" menu, and choose "Build Options" item, the "Build Options" dialog appears.

Click the ">" button, in the popup menu select "New Configuration..." item. The "New Configuration" dialog appears.

We select Builder Type as "CYGWIN", and input Configuration Name "cygwin". Of course, you can select any name that you want. After "OK", the "Compiler Location" dialog appears.

C-Free can detect your installation of Cygwin as you see from the dialog above. If your installation of Cygwin can not be found by C-Free, please use the "Locate Manually" command to locate the Cygwin manually. After clicking OK, all Cygwin paths will be added automatically.

After clicking "OK", Cygwin has been configured ok in C-Free.

Through the steps above, we created a Global Build Configuration named "cygwin". We can use this configuration to build file or project.