ProjectM 3.1.12 (new formula)

Closes #71139.

Signed-off-by: Carlo Cabrera <30379873+carlocab@users.noreply.github.com>

Formula/projectm.rb

@@ -0,0 +1,62 @@
+class Projectm < Formula
+  desc "Milkdrop-compatible music visualizer"
+  homepage "https://github.com/projectM-visualizer/projectm"
+  url "https://github.com/projectM-visualizer/projectm/releases/download/v3.1.12/projectM-3.1.12.tar.gz"
+  sha256 "b6b99dde5c8f0822ae362606a0429628ee478f4ec943a156723841b742954707"
+  license "LGPL-2.1-or-later"
+  head do
+    url "https://github.com/projectM-visualizer/projectm.git"
+
+    depends_on "autoconf" => :build
+    depends_on "automake" => :build
+    depends_on "libtool" => :build
+  end
+
+  depends_on "pkg-config"
+  depends_on "sdl2"
+
+  def install
+    system "./configure", "--disable-debug",
+                          "--disable-dependency-tracking",
+                          "--disable-silent-rules",
+                          "--prefix=#{prefix}"
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"test.cpp").write <<~EOS
+      #include <libprojectM/projectM.hpp>
+      #include <SDL2/SDL.h>
+      #include <stdlib.h>
+      #include <stdio.h>
+
+      int main()
+      {
+        // initialize SDL video + openGL
+        if (SDL_Init(SDL_INIT_VIDEO) < 0)
+        {
+          fprintf(stderr, "Video init failed: %s", SDL_GetError());
+          return 1;
+        }
+        atexit(SDL_Quit);
+
+        SDL_Window *win = SDL_CreateWindow("projectM Test", 0, 0, 320, 240,
+                                          SDL_WINDOW_OPENGL | SDL_WINDOW_ALLOW_HIGHDPI);
+        SDL_GLContext glCtx = SDL_GL_CreateContext(win);
+
+        auto *settings = new projectM::Settings();
+        auto *pm = new projectM(*settings, projectM::FLAG_DISABLE_PLAYLIST_LOAD);
+
+        // if we get this far without crashing we're in good shape
+        return 0;
+      }
+    EOS
+    args = %w[test.cpp -o test]
+    args += shell_output("pkg-config libprojectM sdl2 --cflags --libs").split
+    system ENV.cxx, *args
+    system "./test"
+
+    assert_predicate prefix/"share/projectM/config.inp", :exist?
+    assert_predicate prefix/"share/projectM/presets", :exist?
+  end
+end