我一直在尝试在我的macbook上安装rails，并且遇到了这么大的困难！ 我安装了RVM，当我运行“gem install rails”时，我收到了这条消息：
gem install rails
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
/Users/stephanie/.rvm/rubies/ruby-1.9.2-p320/bin/ruby extconf.rb
creating Makefile
make
/usr/bin/gcc-4.2 -I. -I/Users/stephanie/.rvm/rubies/ruby-1.9.2-p320/include/ruby-1.9.1/x86_64-darwin11.4.0 -I/Users/stephanie/.rvm/rubies/ruby-1.9.2-p320/include/ruby-1.9.1/ruby/backward -I/Users/stephanie/.rvm/rubies/ruby-1.9.2-p320/include/ruby-1.9.1 -I. -DJSON_GENERATOR -I/Users/mpapis/.rvm/usr/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -fno-common -I/opt/sm/pkg/active/include -fno-common -pipe -O3 -Wall -O0 -ggdb -o generator.o -c generator.c
/usr/bin/gcc-4.2 -dynamic -bundle -o generator.bundle generator.o -L. -L/Users/mpapis/.rvm/rubies/ruby-1.9.2-p320/lib -L/Users/mpapis/.rvm/usr/lib -L. -L/opt/sm/pkg/active/lib -L/usr/local/lib -Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,suppress -Wl,-flat_namespace -lruby.1.9.1 -lpthread -ldl -lobjc
ld: warning: directory not found for option '-L/Users/mpapis/.rvm/rubies/ruby-1.9.2-p320/lib'
ld: warning: directory not found for option '-L/Users/mpapis/.rvm/usr/lib'
ld: warning: directory not found for option '-L/opt/sm/pkg/active/lib'
ld: library not found for -lruby.1.9.1
collect2: ld returned 1 exit status
make: *** [generator.bundle] Error 1
我尝试使用谷歌搜索解决方案，但没有找到任何东西。有人有想法吗？谢谢！