New formula: clisp

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

Library/Formula/clisp.rb

@@ -0,0 +1,47 @@
+require 'formula'
+
+class Clisp <Formula
+  url 'http://ftp.gnu.org/pub/gnu/clisp/release/2.49/clisp-2.49.tar.bz2'
+  homepage 'http://clisp.cons.org/'
+  md5 '1962b99d5e530390ec3829236d168649'
+
+  depends_on 'libiconv'
+  depends_on 'libsigsegv'
+  depends_on 'readline'
+
+  skip_clean :all # otherwise abort trap
+
+  def install
+    # This build isn't parallel safe.
+    ENV.j1
+
+    # Clisp requires to select word size explicitly this way,
+    # set it in CFLAGS won't work.
+    ENV['CC'] = "#{ENV.cc} -m#{snow_leopard_64? ? 64 : 32}"
+
+    system "./configure", "--prefix=#{prefix}",
+                          "--with-readline=yes"
+
+    cd "src" do
+      # Multiple -O options will be in the generated Makefile,
+      # make Homebrew's the last such option so it's effective.
+      inreplace "Makefile" do |s|
+        cf = s.get_make_var("CFLAGS")
+        cf.gsub! ENV['CFLAGS'], ''
+        cf += ' '+ENV['CFLAGS']
+        s.change_make_var! 'CFLAGS', cf
+      end
+
+      # The ulimit must be set, otherwise `make` will fail and tell you to do so
+      system "ulimit -s 16384 && make"
+
+      # Considering the complexity of this package, a self-check is highly recommended.
+      system "make check"
+      system "make install"
+    end
+  end
+
+  def test
+    system "clisp --version"
+  end
+end