我使用http://rubyinstaller.org/提供的安装程序在Windows XP上安装了Ruby 1.8.7，并在那里找到了Ruby Dev Kit。两者都在工作，我可以安装宝石，包括一些原生扩展。
我正在尝试使用http://rubygems.org/gems/summarize中的摘要gem。当我运行gem install summarize时，它无法构建本机扩展，我收到此错误：
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
ERROR: Error installing summarize:
ERROR: Failed to build gem native extension.
C:/Ruby187/bin/ruby.exe extconf.rb
creating Makefile
make
gcc -I. -I/C/Ruby187/lib/ruby/1.8/i386-mingw32 -I/C/Ruby187/lib/ruby/1.8/i386-mi
ngw32 -I. -g -O2 -DFD_SETSIZE=256 -c article.c
In file included from article.c:25:0:
libots.h:24:18: fatal error: glib.h: No such file or directory
compilation terminated.
make: *** [article.o] Error 1
Gem files will remain installed in C:/Ruby187/lib/ruby/gems/1.8/gems/summarize-1
.0.3 for inspection.
Results logged to C:/Ruby187/lib/ruby/gems/1.8/gems/summarize-1.0.3/ext/summariz
e/gem_make.out
我不知道如何解决这个问题。