I use set(CMAKE_DEBUG_POSTFIX "_d"), which appends _d to target executable names and libraries in debug mode. When adding a new launch configuration and choosing the executable with the "Project Target" drop-down menu, the debugger complains "It doesn't seem like <target path without _d> is an executable at all". It assumes that the executable is named like the target and therefore fails to find it.

As a workaround one can set the path to the executable explicitly, but it would be nice if the target selection worked.