How to install ruby-debug when needing necessary libraries and/or headers

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The error is in the mkmf.log file. That file should be located at /home/hxh/.rvm/gems/ruby-1.9.3-p448/gems/linecache-0.46/ext/linecache/mkmf.log.

If not, you can use 

sudo find / -name mkmf.log

to find it.

To troubleshoot further, see “How to install Nokogiri Ruby gem with mkmf.log saying libiconv not found?“

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