gem install mysql2 インストールエラー

バージョンアップのたびに、何度もハマる。
今回は、WindowsXP + ruby2.0 + mysql5.5

おなじみ下記のエラー。
[bash]
checking for main() in -llibmysql… no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.

Provided configuration options:
–with-opt-dir
–without-opt-dir
–with-opt-include
–without-opt-include=${opt-dir}/include
–with-opt-lib
–without-opt-lib=${opt-dir}/lib
–with-make-prog
–without-make-prog
–srcdir=.
–curdir
–ruby=C:/usr/local/ruby200/bin/ruby
–with-mysql-dir
–without-mysql-dir
–with-mysql-include=${mysql-dir}/include
–with-mysql-lib=${mysql-dir}/
–with-mysql-dir
–without-mysql-dir
–with-mysql-include=${mysql-dir}/include
–with-mysql-lib=${mysql-dir}/lib
–with-libmysqllib
–without-libmysqllib
[/bash]

[bash]
C:\>gem install mysql2 — ‘–with-mysql-include="C:\Program Files\MySQL\MySQL Server 5.5\include" –with-mysql-lib="C:\Program Files\MySQL\MySQL Server 5.5\lib"’
Temporarily enhancing PATH to include DevKit…
Building native extensions with: ‘–with-mysql-include="C:\Program Files\MySQL\MySQL Server 5.5\incl
ude" –with-mysql-lib="C:\Program Files\MySQL\MySQL Server 5.5\lib"’
This could take a while…
Successfully installed mysql2-0.3.13
Parsing documentation for mysql2-0.3.13
unable to convert "\x90" from ASCII-8BIT to UTF-8 for lib/mysql2/mysql2.so, skipping
Installing ri documentation for mysql2-0.3.13
1 gem installed
[/bash]

毎回、gem install の引数の渡し方が良くない。シングルクウォートで囲う。