These days we build Gideros on a Mac which uses Wine to also build the Windows version. However, the WinRT version needs to be build on a Windows 10 computer so we do that separately and copy files across. The script on Mac then builds Windows and Mac desktop versions, iOS and Android versions and packages everything into gideros.exe and gideros.dmg.
However, if you just want to build the Windows version, WinRT and Android (not iOS and OSX), follow these instructions (you will need a Windows 10 computer):
Clone the gideros source
git clone https://github.com/gideros/gideros.git
Install the latest Visual Studio (2015) with WinRT components. (I actually am still using Visual Studio 2013 for Windows but latest should be fine)
Install Qt 5.6 (select the gcc version). Install it at c:\Qt
Download Qscintilla: http://sourceforge.net/projects/pyqt/files/QScintilla2/QScintilla-2.8.4/QScintilla-gpl-2.8.4.zip
Open the Qt command prompt and run
Install the following Java/Android stuff
Java JDK (both version 6 and 7 are working fine)
Apache Ant - http://ant.apache.org/bindownload.cgi
Android SDK version 21 (get the SDK for an existing IDE) - http://developer.android.com/sdk/index.html
Android NDK - https://developer.android.com/tools/sdk/ndk/index.html
Install mingw from https://sourceforge.net/projects/mingw/files/. Install at the default location, c:\mingw
Now, in the Qt command prompt, cd to "scripts" and run
this will build the Windows desktop version (but if you run GiderosStudio.exe it will crash, wait till you've copied files -- see below)
Now run the following to build Android
(note, the last three batch files assume you have Android NDK r11b installed. If you have another version you will have to edit the batch files and replace references to android-ndk-r11b)
Open the Visual Studio command prompt and run
This should copy the Gideros release to \gideros_gideros\release (assuming you cloned Gideros to \gideros_gideros\gideros). Check the stuff is there!
Finally, to build win32 version, go to gideros/win32_example and run
You should then have a working Gideros on Windows which can export Windows desktop, win32, WinRT and Android. But it cannot export iOS or OSX.