I'm running Qt Creator 2.3.0, based on Qt 4.7.4, on Windows 7 64-bit. When I run the app from Qt Creator (ctrl+r), everything works great. However, when I debug (F5), executing each line takes forever – as in sometimes 2 minutes to execute a single line of code.
I noticed in the Debugger Log window this line: Debugger: C:\Program Files (x86)\Debugging Tools For Windows (x86)\cdb.exe. I thought since I'm running Windows 7 x64, I should be using the 64-bit debugger. So, I downloaded and installed the Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1 as a friend suggested.
Now I see that in Tools..Options..Tool Chains, I have a number of Auto-detected tools. If I select any of the Microsoft Windows SDK for Windows – x86, x64, ia64, or any of the Microsoft Visual C++ Compiler 9.0 – x86, amd64, x64, ia64 – the Debugger is set to "C:\Program Files (x86)\Debugging Tools For Windows (x86)\cdb.exe", and is disabled so I can't change it.
How do I convince Qt Creator to use the 64-bit version of cdb? Is that related to my major problem, the super-slow debugging?
Best Answer
After installing Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1, I upgraded to Qt Creator 2.4. Now when I debug, it started using x64 cdb! The first couple times were still very slow for some reason. However, when I tried to time it, it's now working at a reasonable speed. Even after re-starting Qt Creator or even rebooting, debugging is now running at a reasonable speed: maybe 2-3 seconds to bring up my main form the first time, and 1 second thereafter. Used to take anywhere from a minute to 20 minutes.
So it's working now! Hope this is helpful to someone.