bcrypt - use inreplace and optimize CC/CFLAGS

Formula/bcrypt.rb

@@ -5,29 +5,15 @@ class Bcrypt <Formula
   homepage 'http://bcrypt.sourceforge.net'
   md5 '8ce2873836ccd433329c8df0e37e298c'
 
-  def patches
-    DATA
-  end
-
   def install
+    inreplace "Makefile" do |s|
+      s.change_make_var! "CC", ENV.cc
+      s.change_make_var! "CFLAGS", ENV['CFLAGS']
+      s.change_make_var! "LDFLAGS", "-lz"
+    end
+    
     system "make"
-    system "make install"
+    bin.install "bcrypt"
+    man1.install gzip("bcrypt.1")
   end
-
 end
-__END__
-diff --git a/Makefile b/Makefile
-index b84da0f..96d07e2 100644
---- a/Makefile
-+++ b/Makefile
-@@ -3,8 +3,8 @@ CC = gcc
- CFLAGS = -O2 -Wall 
- COMPILE = ${CC} ${CFLAGS}
- OBJS = main.o blowfish.o rwfile.o keys.o wrapbf.o endian.o wrapzl.o
--LDFLAGS = -L/usr/local/lib -lz 
--PREFIX = /usr/local
-+LDFLAGS = -L`brew --prefix`/lib -lz 
-+PREFIX = `brew --prefix`/Cellar/bcrypt/1.1
- 
- bcrypt:        ${OBJS} Makefile
-        ${COMPILE} -o bcrypt ${OBJS} ${LDFLAGS}