Errors using rspec, missing libraries after installing Homebrew and uninstalling MacPorts

Question

I may have taken one step too far beyond my knowledge. I installed Homebrew and after it continued to give me warnings about having MacPorts installed I uninstalled that. But now my rspec tests don't run.

These are the errors I get:

/Users/mark/.rvm/gems/ruby-1.9.2-p180/gems/nokogiri-1.4.4/lib/nokogiri.rb:13:in `require': dlopen(/Users/mark/.rvm/gems/ruby-1.9.2-p180/gems/nokogiri-1.4.4/lib/nokogiri/nokogiri.bundle, 9): Library not loaded: /opt/local/lib/libiconv.2.dylib (LoadError)
  Referenced from: /Users/mark/.rvm/gems/ruby-1.9.2-p180/gems/nokogiri-1.4.4/lib/nokogiri/nokogiri.bundle
  Reason: Incompatible library version: nokogiri.bundle requires version 8.0.0 or later, but libiconv.2.dylib provides version 7.0.0 - /Users/mark/.rvm/gems/ruby-1.9.2-p180/gems/nokogiri-1.4.4/lib/nokogiri/nokogiri.bundle
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I've installed libiconv through Homebrew, but that didn't fix it. It's complaining about libiconv version numbers. Is this the problem?

What is going on here and what do I need to do?

Answer 1

I got things working again for anyone interested. I removed and re-installed nokogiri gem and everything seems to be working again.

Answer 2

Generally, this problem is caused by being unable to find the right libiconv. Here is how I solve my problem:

Check output of otool -L /usr/lib/libiconv.2.dylib. I got the following output:

/usr/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 7.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 169.3.0)

Then I install libiconv with Homebrew, brew install libiconv, and show where it was installed using brew list libiconv. I got the following output:

/usr/local/Cellar/libiconv/1.14/bin/iconv
/usr/local/Cellar/libiconv/1.14/include/ (3 files)
/usr/local/Cellar/libiconv/1.14/lib/libcharset.1.dylib
/usr/local/Cellar/libiconv/1.14/lib/libiconv.2.dylib
/usr/local/Cellar/libiconv/1.14/lib/ (3 other files)
/usr/local/Cellar/libiconv/1.14/share/doc/ (6 files)
/usr/local/Cellar/libiconv/1.14/share/man/ (6 files)

the libiconv is installed in /usr/local/Cellar/libiconv/1.14/lib/libiconv.2.dylib. Then I check verion of newly installed libiconv, otool -L /usr/local/Cellar/libiconv/1.14/lib/libiconv.2.dylib, and I got the following output:

/usr/local/Cellar/libiconv/1.14/lib/libiconv.2.dylib:
/usr/local/opt/libiconv/lib/libiconv.2.dylib (compatibility version 8.0.0, current version 8.1.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 169.3.0)

The version is correct, and we need to make this library available for Ruby. Creating a symbol link is a quick solution:

sudo ln -s /usr/local/opt/libiconv/lib/libiconv.2.dylib /opt/local/lib/libiconv.2.dylib