libgig 3.3.0 (new formula)

Closes Homebrew/homebrew#47486.

Signed-off-by: Andrew Janke <andrew@apjanke.net>

Formula/libgig.rb

@@ -0,0 +1,37 @@
+class Libgig < Formula
+  desc "library for Gigasampler and DLS (Downloadable Sounds) Level 1/2 files"
+  homepage "https://www.linuxsampler.org/libgig/"
+  url "http://download.linuxsampler.org/packages/libgig-3.3.0.tar.bz2"
+  sha256 "d22a3c7ba13d920c1d4b6c218107ad105622ae9d1236ffbce007b98547774425"
+
+  depends_on "pkg-config" => :build
+  depends_on "libsndfile"
+
+  def install
+    # parallel make does not work, fixed in next version (4.0.0)
+    ENV.deparallelize
+    # link with CoreFoundation, default in next version (4.0.0)
+    ENV.append "LDFLAGS", "-framework CoreFoundation"
+
+    system "./configure", "--disable-dependency-tracking",
+                          "--disable-silent-rules",
+                          "--prefix=#{prefix}"
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"test.cpp").write <<-EOS.undent
+      #include <gig.h>
+      #include <iostream>
+      using namespace std;
+
+      int main()
+      {
+        cout << gig::libraryName() << endl;
+        return 0;
+      }
+    EOS
+    system ENV.cxx, "test.cpp", "-L#{lib}", "-lgig", "-o", "test"
+    assert_match "libgig", shell_output("./test")
+  end
+end