raylib 1.9.1-dev (new formula)

Formula depends on build system changes that aren't in master, therefore
stable points to the oldest development tag that has the changes and
--HEAD points to the develop branch.

Next stable release is slated for Summer 2018.

Closes #21041.

Signed-off-by: ilovezfs <[email protected]>

Formula/raylib.rb

@@ -0,0 +1,34 @@
+class Raylib < Formula
+  desc "Simple and easy-to-use library to learn videogames programming"
+  homepage "http://www.raylib.com/"
+  url "https://github.com/raysan5/raylib/archive/1.9.1-dev.tar.gz"
+  version "1.9.1-dev"
+  sha256 "892357fb44d340eb7449c23c425d660d98b34b91434400e7610514ef02698600"
+  head "https://github.com/raysan5/raylib.git", :branch => "develop"
+
+  depends_on "cmake" => :build
+
+  def install
+    system "cmake", ".", "-DSTATIC_RAYLIB=ON",
+                         "-DSHARED_RAYLIB=ON",
+                         "-DMACOS_FATLIB=OFF",
+                         "-DBUILD_EXAMPLES=OFF",
+                         "-DBUILD_GAMES=OFF",
+                         *std_cmake_args
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"test.c").write <<~EOS
+      #include <stdlib.h>
+      #include <raylib.h>
+      int main(void)
+      {
+          int num = GetRandomValue(42, 1337);
+          return 42 <= num && num <= 1337 ? EXIT_SUCCESS : EXIT_FAILURE;
+      }
+    EOS
+    system ENV.cc, "test.c", "-L#{lib}", "-lraylib", "-o", "test"
+    system "./test"
+  end
+end