Add formula for symphony (MIP solver).

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/symphony.rb

@@ -0,0 +1,42 @@
+require 'formula'
+
+class Symphony < Formula
+  url 'http://www.coin-or.org/download/source/SYMPHONY/SYMPHONY-5.3.3.tgz'
+  homepage 'http://www.coin-or.org/projects/SYMPHONY.xml'
+  md5 '8c34f9fa49ebff325b984408ff1f92fc'
+
+  def options
+    [
+     ["--enable-openmp", "Enable openmp support"],
+     ["--with-gmpl", "Add in GNU Modeling Lang. support via GLPK"]
+    ]
+  end
+
+  def install
+    args = ["--disable-debug", "--disable-dependency-tracking",
+            "--enable-shared=no", # can't get shared libs to work
+            "--enable-static-executable",
+            "--prefix=#{prefix}"]
+
+    if ARGV.include? "--with-gmpl"
+      # Symphony uses a patched version of GLPK for reading MPL files.
+      # Use a private version rather than require the Homebrew version of GLPK.
+      Dir.chdir 'ThirdParty/Glpk' do
+        system "./get.Glpk"
+      end
+      dir_glpk = Pathname.getwd + 'ThirdParty/Glpk/glpk/src'
+      ENV.append "CPPFLAGS", "-I#{dir_glpk}"
+      ENV.append "CDEFS", "-DUSE_GLPMPL"
+      args << "--with-gmpl"
+    end
+
+    if ARGV.include? "--enable-openmp"
+      inreplace 'SYMPHONY/config', /^SYM_COMPILE_IN_LP = TRUE/, "SYM_COMPILE_IN_LP = FALSE"
+      args << "--enable-openmp"
+    end
+
+    system "./configure",  *args
+    system "make"
+    system "make install"
+  end
+end