gistfile1.txt

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+$ gem install bson_ext
+Building native extensions.  This could take a while...
+ERROR:  Error installing bson_ext:
+	ERROR: Failed to build gem native extension.
+
+        /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb
+checking for asprintf()... *** 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
+	--without-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/adrian/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
+/Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to generate an executable file. (RuntimeError)
+You have to install development tools first.
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:435:in `try_link0'
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:440:in `try_link'
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:552:in `try_func'
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:797:in `block in have_func'
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for'
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels) in postpone'
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:254:in `open'
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone'
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:254:in `open'
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:276:in `postpone'
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for'
+	from /Users/adrian/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:796:in `have_func'
+	from extconf.rb:3:in `<main>'
+
+
+Gem files will remain installed in /Users/adrian/.rvm/gems/ruby-1.9.2-p290@pluto/gems/bson_ext-1.6.4 for inspection.
+Results logged to /Users/adrian/.rvm/gems/ruby-1.9.2-p290@pluto/gems/bson_ext-1.6.4/ext/cbson/gem_make.out