crossroads 1.0.1

Closes Homebrew/homebrew#11060.

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

Formula/crossroads.rb

@@ -0,0 +1,31 @@
+require 'formula'
+
+class Crossroads < Formula
+  homepage 'http://www.crossroads.io/'
+  url 'https://download.crossroads.io/libxs-1.0.1.tar.gz'
+  md5 '915aaf168f4a47d8ccf6d03b33845038'
+  head 'https://github.com/crossroads-io/libxs.git'
+
+  fails_with_llvm "Compiling with LLVM gives a segfault while linking.",
+                  :build => 2326 if MacOS.snow_leopard?
+
+  if ARGV.build_head? and MacOS.xcode_version >= "4.3"
+    depends_on "automake" => :build
+    depends_on "libtool" => :build
+  end
+
+  def options
+    [['--with-pgm', 'Build with PGM extension']]
+  end
+
+  def install
+    system "./autogen.sh" if ARGV.build_head?
+
+    args = ["--disable-dependency-tracking", "--prefix=#{prefix}"]
+    args << "--with-pgm" if ARGV.include? '--with-pgm'
+    system "./configure", *args
+
+    system "make"
+    system "make install"
+  end
+end