我在

Windows7中安装了

Ruby版本的ruby 1.9.2p0(2010-08-18)[i386-mingw32].

和宝石血统1.3.7

当我试图安装mysql gem时,显示无法构建gem本机扩展错误,为什么会这样？我的mysql版本是5.1.36(WampServer)

E:\RubyApps\test_app2>gem install mysql2

Building native extensions. This could take a while...

ERROR: Error installing mysql2:

ERROR: Failed to build gem native extension.

E:/Ruby192/bin/ruby.exe extconf.rb

checking for rb_thread_blocking_region()... *** 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=E:/Ruby192/bin/ruby

E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to genera

te an executable file. (RuntimeError)

You have to install development tools first.

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:435:in `try_link0'

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:440:in `try_link'

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:552:in `try_func'

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:797:in `block in have_func'

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for'

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels) in postp

one'

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:254:in `open'

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone'

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:254:in `open'

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:276:in `postpone'

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for'

from E:/Ruby192/lib/ruby/1.9.1/mkmf.rb:796:in `have_func'

from extconf.rb:9:in `'

Gem files will remain installed in E:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.

2.3 for inspection.

Results logged to E:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.2.3/ext/mysql2/ge

m_make.out

E:\RubyApps\test_app2>