How do I compile a .exe file which I can run on any windows computer?

SGaist

I'd first cleanup to ensure there's no remaining from your old build tentative.

Also, consider doing out of source builds, that will simplify things if you want to build Qt for several architectures or make different static/shared builds.

StevenD

What should I clean up? Attempting to run mingw32-make clean results in mingw32-make: *** No rule to make target 'clean'. Stop.

In addition, I do not see any additional files I should delete.

SGaist

Because you are calling configure repeatedly with different options, so you should cleanup between invocation.

StevenD

I know I should clean, but what and how do I clean?

jsulm

@StevenD You should start with fresh Qt source tree and do out of source build as @SGaist suggested.
Out of source means:

c:\qt_source
mkdir c:\qt_build
cd c:\qt_build
..\qt_source\configure.exe...
make

So, basically you call configure and make from outside of the Qt source code directory.
In general you should read http://doc.qt.io/qt-5/build-sources.html

StevenD

Right, I now have a different problem:

C:\qt_build>..\Qt-3.0.1\5.9.2\Src\configure -opensource -confirm-license -nomake examples -nomake tests -static
+ cd qtbase
+ C:\Qt-3.0.1\5.9.2\Src\qtbase\configure.bat -top-level -opensource -confirm-license -nomake examples -nomake tests -static
Host platform 'win32-g++' is invalid. Aborting.

SGaist

From a clean source ?
What command prompt are you using ?

StevenD

I've tried using cmd and PowerShell, in that order. Both give the same ouput.

This may be a problem with Windows. I've recently started having... issues with it that are not related to Qt. Random applications suddenly can't run on my pc... I had this pop up with Qt Creator, Cygwin, and some other things.

SGaist

IIRC Windows latest updates may broke things in surprising ways.