Added MySQL 5.5. It's still a bit experimental though

svn path=/nixpkgs/trunk/; revision=28145

pkgs/servers/sql/mysql55/default.nix

@@ -0,0 +1,27 @@
+{stdenv, fetchurl, cmake, bison, ncurses, openssl, readline, zlib}:
+
+# Note: zlib is not required; MySQL can use an internal zlib.
+
+stdenv.mkDerivation {
+  name = "mysql-5.5.15";
+
+  src = fetchurl {
+    url = ftp://mirror.leaseweb.com/mysql/Downloads/MySQL-5.5/mysql-5.5.15.tar.gz;
+    sha256 = "10jwkkmp231swc986z01nsp0q67kp0zdkfb4q4v9if2vn6a51ldy";
+  };
+
+  buildInputs = [ cmake bison ncurses openssl readline zlib ];
+  
+  cmakeFlags = "-DWITH_SSL=yes -DWITH_READLINE=yes -DWITH_EMBEDDED_SERVER=yes -DWITH_ZLIB=yes -DINSTALL_SCRIPTDIR=bin";
+  
+  NIX_LDFLAGS = stdenv.lib.optionalString stdenv.isLinux "-lgcc_s";
+
+  postInstall = ''
+    sed -i -e "s|basedir=\"\"|basedir=\"$out\"|" $out/bin/mysql_install_db
+  '';
+
+  meta = {
+    homepage = http://www.mysql.com/;
+    description = "The world's most popular open source database";
+  };
+}

pkgs/top-level/all-packages.nix

@@ -4769,6 +4769,8 @@ let
     ps = procps; /* !!! Linux only */
   };
 
+  mysql55 = callPackage ../servers/sql/mysql55 { };
+
   mysql = mysql51;
 
   mysql_jdbc = callPackage ../servers/sql/mysql/jdbc { };