hs-mac-air:~ zuohaisu$ sudo gem install bson_ext -v '1.9.2'
Building native extensions. This could take a while...
ERROR: Error installing bson_ext:
ERROR: Failed to build gem native extension.
/Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/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
--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/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/bin/ruby
/Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:461:in `try_link0'
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:476:in `try_link'
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:619:in `try_func'
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:894:in `block in have_func'
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:254:in `open'
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:254:in `open'
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'
from /Users/zuohaisu/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/mkmf.rb:893:in `have_func'
from extconf.rb:3:in `<main>'
Gem files will remain installed in /Users/zuohaisu/.rvm/gems/ruby-1.9.3-p429/gems/bson_ext-1.9.2 for inspection.
Results logged to /Users/zuohaisu/.rvm/gems/ruby-1.9.3-p429/gems/bson_ext-1.9.2/ext/cbson/gem_make.out
我试图安装 bson_ext 但总是失败。有人可以帮忙吗？我的 rails 版本是 1.9.3 我的 Mongo shell 版本是 2.4.3 我的 rails 版本是 4 据说缺少一些库。这意味着什么？