Troubleshooting using Gem

I have cloned an existing repository and am now running bundle install

- for some reason it fails in the ruby-audio gem.

Installing ruby-audio (1.6.1) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

/Users/thisuser/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb 
checking for sndfile.h in /opt/local/include,/usr/local/include,C:/Program Files (x86)/Mega-Nerd/libsndfile/include,C:/Program Files/Mega-Nerd/libsndfile/include... no
checking for sf_open() in -lsndfile-1... no
checking for sf_open() in -lsndfile... no
*** 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/thisuser/.rvm/rubies/ruby-1.9.3-p194/bin/ruby
--with-sndfile-dir
--without-sndfile-dir
--with-sndfile-include
--without-sndfile-include=${sndfile-dir}/include
--with-sndfile-lib
--without-sndfile-lib=${sndfile-dir}/lib
--with-sndfile-1lib
--without-sndfile-1lib
--with-sndfilelib
--without-sndfilelib
extconf.rb:26:in `<main>':   Can't find libsndfile (http://www.mega-nerd.com/libsndfile/) (RuntimeError)

  Try passing --with-sndfile-dir or --with-sndfile-lib and --with-sndfile-include
  options to extconf. If there are spaces in the path on windows, it may not work.

Gem files will remain installed in /Users/thisuser/.bundler/tmp/5253/gems/ruby-audio-1.6.1 for inspection.
Results logged to /Users/thisuser/.bundler/tmp/5253/gems/ruby-audio-1.6.1/ext/rubyaudio_ext/gem_make.out
An error occured while installing ruby-audio (1.6.1), and Bundler cannot continue.
Make sure that `gem install ruby-audio -v '1.6.1'` succeeds before bundling.

      

        
        
        
      

    

To be honest, I have no idea what to do about it. Googling showed the same error with the mysql gem and the solutions were mysql specific.

Has anyone come across this? If not, is there a way to explicitly tell the rails to ignore this stone? Removing it from the gem file and running it bundle install

again didn't help.

Thanks for any help!

Edit

After running, brew install libsndfile

I got the following output:

Warning: Your Xcode (4.5.2) is outdated
Please install Xcode 4.6.
==> Downloading http://www.mega-nerd.com/libsndfile/files/libsndfile-1.0.25.tar.gz
Already downloaded: /Library/Caches/Homebrew/libsndfile-1.0.25.tar.gz
==> Patching
patching file programs/sndfile-play.c
==> ./configure --prefix=/usr/local/Cellar/libsndfile/1.0.25
==> make install
make[1]: *** [sndfile-play.o] Error 1
make[1]: *** Waiting for unfinished jobs....
brew: superenv removed: -g -O2 -Wall -Wextra -Wdeclaration-after-statement -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes -Wcast-align -Wcast-qual -Wnested-externs -Wbad-function-cast -Wwrite-strings -Wundef
brew: superenv removed: -g -O2 -Wall -Wextra -Wdeclaration-after-statement -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes -Wcast-align -Wcast-qual -Wnested-externs -Wbad-function-cast -Wwrite-strings -Wundef
make: *** [install-recursive] Error 1
Your Xcode and or CLT are mis-configured. Try some or all of the following:
    xcrun --kill-cache
    xcodebuild -license
    sudo xcode-select -switch /path/to/Xcode.app

      

        
        
        
      

    

I tried all the suggested commands - to no avail. What else can I do to fix this problem?