mingw32/bin/ld.exe ... undefined reference to [class] ... collect2.exe: error: ld returned 1 exit status

Problem description while I am trying to move my code from Linux to Windows:

• MinGW on Windows linker problems
• happens when I am calling a user-defined class inside my Main.cpp ( works fine if I do not call the user-defined class constructor in Main )

Relevant code samples:

Person.hpp

class Person
{
    public:
        Person(const string& iName, 
                const list<string>& iContactDetails,
               ); 

        virtual ~Person(); 
        ...

Main.cpp

#include "Person.hpp"
...
int main()
{
...
Person myPerson = Person (myName, myContactDetails); //here is the linker problem
...
return 0;
}

Compilation command:

standalone

g++ -o MyProgram.exe Main.cpp -Wall

Makefile (tried even CC instead of CXX, or LDFLAGS=-lgdi32 instead of CXXFLAGS)

EXECUTABLE = MyProgram.exe

CXX = "C:\MinGW\bin\g++.exe"
CXXFLAGS = -Wall      // tried LDFLAGS=-lgdi32 as well

src = $(wildcard *.cpp)
obj = $(src:.cpp=.o)

all: myprog

myprog: $(obj)
    $(CXX) -o $(EXECUTABLE) $^ $(CXXFLAGS)

.PHONY: clean
clean:
    del $(obj) $(EXECUTABLE)

Error:

c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:\Users\....:Main.cpp:(.text+0x124c): undefined reference to `Person::~Person()'
collect2.exe: error: ld returned 1 exit status

As a summary, I encounter Linker problems during the MinGW G++ compilation step:

All external entity references are resolved. Library components are linked to satisfy external references to entities not defined in the current translation. All such translator output is collected into a program image which contains information needed for execution in its execution environment.

I tried to follow other similar problems, but they are unfortunately different issues:

1. C compiler error: undefined reference to function
2. What is an undefined reference/unresolved external symbol error and how do I fix it?
3. facing error in linking codes in c++

How should I change my Makefile or my code? What flags does MinGW uses in Windows? Thank you very much