Can I have source code ouside project folder in xcode? - c++

Question

I just created my first xcode C++ project. Directory structure looks like the following:
myproject
+-xproject
+-xproject
| +-main.cpp
+-xproject.xcodeproj
Let me describe it (not sure if its necessary). The base folder is myproject, everything inside it was created by xcode.
Instead, I would like have main.cpp outside, like the following:
myproject
+-main.cpp
+-xproject
+-xproject.xcodeproj
Is that possible? How can I get things this way?
Why I want that? Because different IDEs offer different benefits (and debugging in qtcreator might be less straightforward than in xcode, How to debug C++ project using Qt Creator?)
Actually xproject.xcodeproj is a folder which contains:
xproject/xproject.xcodeproj
├── project.pbxproj
├── project.xcworkspace
│   ├── contents.xcworkspacedata
│   ├── xcshareddata
│   │   └── IDEWorkspaceChecks.plist
│   └── xcuserdata
│   └── user.xcuserdatad
│   └── UserInterfaceState.xcuserstate
└── xcuserdata
└── user.xcuserdatad
└── xcschemes
└── xcschememanagement.plist
What I tried (looks like Eljay approach): Open project on xcode, remove xproject/main.cpp and then add myproject/main.cpp. Hit play button and it says build succedded. But also says:
Could not launch "xproject"
LLDB provided no error string.
When I click details I get:
Domain: IDEDebugSessionErrorDomain
Code: 3
Failure Reason: LLDB provided no error string.
User Info: {
DVTRadarComponentKey = 855031;
RawLLDBErrorMessage = "LLDB provided no error string.";
}

Answer 1

ln -s xproject/main.cpp main.cpp
Although I don't like this solution because the original file have to be inside xcode project.
I tried the oposite, but then xcode refuses to work.