warning: GDB: Failed to set controlling terminal: Invalid argument

I'm using Qt Creator on Ubuntu to de开发者_如何学Pythonvelop C. Whenever I run with the debugger, I get the message warning: GDB: Failed to set controlling terminal: Invalid argument. This happens even with a hello world program. How can I solve this?

This is a bug in Qt Creator, which is not invoking GDB correctly (either inside a pseudoterminal, or with command line arguments that tell it not to expect to be run inside a pseudoterminal). It is also a bug in GDB, which could figure out for itself that it wasn't being run inside a pseudoterminal and behave accordingly. I suspect the GDB maintainers will take the position that this is Qt Creator's fault, and vice versa, alas.

There is a claimed workaround here: http://www.qtforum.org/article/31905/debugging-qt-application-on-linux.html but it sounds kinda dodgy to me.

Whether this warning is a bug or not, it is informative as a clue that you have the option to tell QtCreator to cause your program to run in a terminal which may be useful for debug output. See Setup GDB with QtCreator to enable this option.

If you don't want a terminal open, then just ignore the warning.