T-640

Indeed it looks like the developers have not been using Windows XP for a while, looking at the forums I see that problems started to show up at least as far as version 20, but I am glad that I can actually still make it work there to begin with, albeit with a few minor tweaks. As for the details: the 32-bit version of course, the 64-bit one is a rarity as far as I understand. The OS has the service pack 3 installed, but none of the updates after that (which probably do not matter in this context)....

Icons on Windows XP look odd

Having a further look I came to conclusion that your code should be fine, the issue is with the Dr. Mingw library. The libraries exchndl.dll and mgwhelp.dll are the ones that must have been compiled with PSAPI_VERSION 2. Furthermore, the newer version of the Microsoft's dbghelp.dll library supplied in Dr. Mingw's newer releases is incompatible with Windows XP. Not to worry, however, as there is still a more or less elegant solution. You can supply both the older Dr. Mingw version and the newest one...

Before trying the .qbs files in the attachment please delete the "Workspace.qbs.user" file (just the ".user" file, not the "Workspace.qbs" itself). I forgot to do it and apparently it is impossible to reupload the attachment or edit the initial message altogether. This file is something that Qt Creator makes, in some way similar to .layout and .depends files that Code::Blocks writes.

Build system enhancements

Quite an old bug, and a pretty nasty one I might add. I needed to write a build script that goes beyond simply setting compiler options, but because it gets executed multiple times, upon error being encountered, I was bombarded with a barrage of popup windows telling about the error, having to violently smash the enter key until they were all gone. What makes things worse is that there is more to it than just multiple redundant executions. I have attached an environment where the issue is reproduced....

Quite an old bug, and a pretty nasty one I might add. I needed to write a build script that goes beyond simply setting compiler options, but because it gets executed multiple times, upon error being encountered, I was bombarded with a barrage of popup windows telling about the error, having to violently smash the enter key until they were all gone. What makes thing worse is that there is more to it than just multiple redundant executions. I have attached an environment where the issue is reproduced....

Quite an old bug, and a pretty nasty one I might add. I needed to write a build script that goes beyond simply setting compiler options, but because it gets executed multiple times, upon error being encountered, I was bombarded with a barrage of popup windows telling about the error, having to violently smash the enter key until they were all gone. What makes thing worse is that there is more to it than just multiple redundant executions. I have attached an environment where the issue is reproduced....