Assumed that MinGW-64 (C/C++ compiler) have been installed and system environment variable (Path) setup.
Download the raylib from GitHub and extract it
https://github.com/raysan5/raylib

Build raylib using make
Using MinGW make a tool, just navigate from the command line to raylib/src/
folder and type:
mingw32-make PLATFORM=PLATFORM_DESKTOP

Project folder structure

Example (main.cpp)
#include "raylib.h"
int main(void)
{
InitWindow(800, 450, "raylib [core] example - basic window");
while (!WindowShouldClose())
{
BeginDrawing();
ClearBackground(RAYWHITE);
DrawText("Congrats! You created your first window!", 190, 200, 20, LIGHTGRAY);
EndDrawing();
}
CloseWindow();
return 0;
}
Makefile
default:
g++ ../main.cpp -o test.exe -O2 -Wall -Wno-missing-braces -I ../include/ -L ../lib/ -lraylib -lopengl32 -lgdi32 -lwinmm
Run
mingw32-make
Binary (/build)
test.exe