Ошибка: не удалось создать встроенное расширение gem

Я пробовал следовать некоторым советам по удалению libv8 и переустановить его, а затем запустить пакет, но он, похоже, не работает. Я пытаюсь установить twitter-bootstrap-rails с меньшим количеством.

> gem install libv8 -v 3.16.14.3 -- --with-system-v8
Done installing documentation for  after 0 seconds
> bundle update
Updating git://github.com/seyhunak/twitter-bootstrap-rails.git
Fetching gem metadata from https://rubygems.org/.........
Fetching additional metadata from https://rubygems.org/..
Resolving dependencies...
Installing rake (10.3.1)
Using i18n (0.6.9)
Using minitest (4.7.5)
Using multi_json (1.9.2)
Installing thread_safe (0.3.3)
Installing tzinfo (0.3.39)
Using activesupport (4.0.2)
Using builder (3.1.4)
Using erubis (2.7.0)
Using rack (1.5.2)
Using rack-test (0.6.2)
Using actionpack (4.0.2)
Using mime-types (1.25.1)
Using polyglot (0.3.4)
Using treetop (1.4.15)
Using mail (2.5.4)
Using actionmailer (4.0.2)
Using activemodel (4.0.2)
Using activerecord-deprecated_finders (1.0.3)
Using arel (4.0.2)
Using activerecord (4.0.2)
Using bcrypt (3.1.7)
Using bundler (1.5.2)
Using coffee-script-source (1.7.0)
Using execjs (2.0.2)
Using coffee-script (2.2.0)
Installing thor (0.19.1)
Using railties (4.0.2)
Using coffee-rails (4.0.1)
Using orm_adapter (0.5.0)
Using warden (1.2.3)
Installing devise (3.2.4)
Using hike (1.2.3)
Using jbuilder (1.5.3)
Using jquery-rails (3.1.0)
Using json (1.8.1)
Using kaminari (0.15.1)
Using libv8 (3.16.14.3)
Using tilt (1.4.1)
Using sprockets (2.11.0)
Using sprockets-rails (2.0.1)
Using rails (4.0.2)
Using rdoc (4.1.1)
Using ref (1.0.5)
Installing sass (3.2.19)
Installing sass-rails (4.0.3)
Using sdoc (0.4.0)
Using simple_form (3.0.2)
Using sqlite3 (1.3.9)

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb 
checking for main() in -lpthread... yes
checking for main() in -lobjc... yes
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling accessor.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling array.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling backref.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling constants.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling constraints.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling context.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling date.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling exception.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling external.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling function.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling gc.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling handles.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling heap.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling init.cc
clang: warning: argument unused during compilation: '-rdynamic'
init.cc:11:20: warning: empty parentheses interpreted as a function declaration [-Wvexing-parse]
    v8::Locker lock();
                   ^~
init.cc:11:20: note: remove parentheses to declare a variable
    v8::Locker lock();
                   ^~
init.cc:11:16: warning: 'lock' has C-linkage specified, but returns user-defined type 'v8::Locker' which is incompatible with C [-Wreturn-type-c-linkage]
    v8::Locker lock();
               ^
2 warnings generated.
compiling invocation.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling locker.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling message.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling object.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling primitive.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling rr.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling script.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling signature.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling stack.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling string.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling template.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling trycatch.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling v8.cc
clang: warning: argument unused during compilation: '-rdynamic'
compiling value.cc
clang: warning: argument unused during compilation: '-rdynamic'
linking shared-object v8/init.bundle
clang: error: unknown argument: '-multiply_definedsuppress' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
make: *** [init.bundle] Error 1

make failed, exit code 2

Gem files will remain installed in /Users/****/.bundler/tmp/63501/gems/therubyracer-0.12.1 for inspection.
Results logged to /Users/****/.bundler/tmp/63501/extensions/universal-darwin-13/2.0.0/therubyracer-0.12.1/gem_make.out
An error occurred while installing therubyracer (0.12.1), and Bundler cannot
continue.
Make sure that `gem install therubyracer -v '0.12.1'` succeeds before bundling.

Я не уверен, что еще делать в этот момент. Должен ли я попытаться удалить драгоценные камни и переустановить их?