ruby-debug Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers

Question

My Rails is 3.2.1.4, Ruby is 1.9.3p448.

I got an error when I install ruby-debug:

Building native extensions.          


        

Answer 1

You're most likely missing some file headers (e.g. zlib or libiconv), so try installing them.

Linux: sudo apt-get install libz-dev libiconv-hook1 libiconv-hook-dev

OS X: brew install libiconv && xcode-select --install

Otherwise check your mkmf.log file for more specific details.