opencbm 0.4.99.97: open Commodore device access

Provides disk and other device manipulation programs for Commodore
Business Machine peripherals such as the 1541/1571 disk drives (often
used with the Commodore 64/128) and printers.

Added initial revision of opencbm tools for accessing Commodore disks,
printers, etc.

Tested to work under OS X 10.9/x86-64 and 10.4/ppc using tigerbrew.

Closes Homebrew/homebrew#26905.

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

Formula/opencbm.rb

@@ -0,0 +1,35 @@
+require "formula"
+
+class Opencbm < Formula
+  homepage "http://www.trikaliotis.net/opencbm-alpha"
+  url "http://www.trikaliotis.net/Download/opencbm-0.4.99.97/opencbm-0.4.99.97.tar.bz2"
+  sha1 "e0f4b6c3d134d77e3da66ce4e2e1d945fded5fb6"
+  head "git://git.code.sf.net/p/opencbm/code"
+
+  # cc65 is only used to build binary blobs included with the programs; it's
+  # not necessary in its own right.
+  depends_on "cc65" => :build
+  depends_on "libusb-compat"
+
+  def install
+    # This one definitely breaks with parallel build.
+    ENV.deparallelize
+
+    args = %W[
+      -fLINUX/Makefile
+      LIBUSB_CONFIG=#{Formula["libusb-compat"].bin}/libusb-config
+      PREFIX=#{prefix}
+      MANDIR=#{man1}
+    ]
+
+    # The build is buried one directory down.
+    cd "opencbm" do
+      system "make", *args
+      system "make", "install-all", *args
+    end
+  end
+
+  test do
+    system "#{bin}/cbmctrl", "--help"
+  end
+end