why3 0.85 (new formula)

Closes Homebrew/homebrew#36314.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/why3.rb

@@ -0,0 +1,22 @@
+class Why3 < Formula
+  homepage "http://why3.lri.fr/"
+  url "https://gforge.inria.fr/frs/download.php/file/34074/why3-0.85.tar.gz"
+  sha1 "c8d5f56c80f936a667ea2719baa99bb84a5f05ca"
+
+  depends_on "objective-caml"
+  depends_on "coq" => :optional
+  depends_on "lablgtk" => :optional
+  depends_on "hevea" => [:build, :optional]
+  depends_on "rubber" => :build
+
+  def install
+    system "./configure", "--enable-verbose-make",
+                          "--prefix=#{prefix}"
+    system "make"
+    system "make", "install"
+  end
+
+  test do
+    system "#{bin}/why3", "config", "--detect", "--dont-save"
+  end
+end