Here is the Build Log error for Code::Blocks:
-------------- Build: Debug in sample (compiler: GNU GCC Compiler)---------------
mingw32-g++.exe -LC:\code\SDL2-2.0.8\lib\x86 -o bin\Debug\sample.exe obj\Debug\01_hello_SDL.o -lmingw32 -lSDL2main -lSDL2
C:\code\SDL2-2.0.8\lib\x86/SDL2main.lib(Win32/Release/SDL_windows_main.obj):(.text[_main]+0x0): multiple definition of `main’
C:/Program Files/CodeBlocks/MinGW/bin/…/lib/gcc/mingw32/5.1.0/…/…/…/libmingw32.a(main.o):main.c:(.text.startup+0x0): first defined here
collect2.exe: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 4 second(s))
1 error(s), 0 warning(s) (0 minute(s), 4 second(s))
I was able to get Dev-C++ up and running by reinstalling it and downloading the mingw compiler separately. I’m not sure why this worked, but it did.