问在Ruby 1.9.3中安装调试器行缓存时出错

EN

trunk ☺  gem install debugger-linecache -v '1.0.1'
Building native extensions.  This could take a while...
ERROR:  Error installing debugger-linecache:
    ERROR: Failed to build gem native extension.

        /Users/jordanscales/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb
checking for vm_core.h... no
checking for vm_core.h... no
Makefile creation failed
**************************************************************************
No source for ruby-1.9.3-p194 provided with debugger-ruby_core_source gem.
**************************************************************************
*** 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
    --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=/Users/jordanscales/.rvm/rubies/ruby-1.9.3-p194/bin/ruby
    --with-ruby-dir
    --without-ruby-dir
    --with-ruby-include
    --without-ruby-include=${ruby-dir}/include
    --with-ruby-lib
    --without-ruby-lib=${ruby-dir}/lib


Gem files will remain installed in /Users/jordanscales/.rvm/gems/ruby-1.9.3-p194/gems/debugger-linecache-1.0.1 for inspection.
Results logged to /Users/jordanscales/.rvm/gems/ruby-1.9.3-p194/gems/debugger-linecache-1.0.1/ext/trace_nums/gem_make.out
trunk ☺