Cannot compile file using catch2 CATCH_CONFIG_MAIN

I've started out learning how to use Catch2 for testing my C++ code and am trying to set up a simple test.

My folder structure consists of three files all in the same folder:

catch.cpp //this is the catch_amalgamated.cpp file from GitHub
catch.hpp //this is the catch_amalgamated.hpp file from GitHub
test.cpp  //this is my test file

All I have written in test.cpp is:

#define CATCH_CONFIG_MAIN
#include "catch.hpp"

When I try to compile test.cpp I get the following error which I think indicates that there is no main() function found(?):

C:/Program Files/mingw-w64/x86_64-8.1.0-posix-seh-rt_v6-rev0/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/lib/../lib/libmingw32.a(lib64_libmingw32_a-crt0_c.o):crt0_c.c:(.text.startup+0x2e): undefined reference to `WinMain'
collect2.exe: error: ld returned 1 exit status

When I add a nominal main() function, the file compiles successfully, but as I understand it #define CATCH_CONFIG_MAIN is supposed to create the main() function for you so something clearly isn't working.

Can anyone shed any light on this?

Solution

The error was occurring because the default branch that google takes you to is the development branch of catch2, so I was using version 3 files and following version 2 documentation (as it has not been updated yet). Once I downloaded the v.2 file everything started working fine.