Add build requirements

CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.10.0)
+project(njetris VERSION 0.1.0 LANGUAGES C)
+
+add_executable(njetris tetris.c)
+
+#add raylib
+find_package(raylib REQUIRED)
+target_link_libraries(njetris raylib m)

buildraylib.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+git clone --depth 1 https://github.com/raysan5/raylib.git raylib
+cd raylib/src/
+make PLATFORM=PLATFORM_DESKTOP # To make the static version.
+make PLATFORM=PLATFORM_DESKTOP RAYLIB_LIBTYPE=SHARED # To make the dynamic shared version.
+make PLATFORM=PLATFORM_WEB # To make web version.