嗨，我在捆绑我的 gem 时总是遇到关于 libv8 的问题：
这是错误跟踪：
Installing libv8 (3.11.8.17)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/Users/xiruki/.rvm/rubies/ruby-1.9.3-p448/bin/ruby extconf.rb
creating Makefile
Compiling v8 for x64
Using python 2.7.5
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Unable to find a compiler officially supported by v8.
It is recommended to use GCC v4.4 or higher
Using compiler: g++
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Unable to find a compiler officially supported by v8.
It is recommended to use GCC v4.4 or higher
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/atomicops_internals_x86_gcc.o has no symbols
In file included from ../src/accessors.cc:28:
In file included from ../src/v8.h:60:
In file included from ../src/objects-inl.h:38:
In file included from ../src/elements.h:33:
In file included from ../src/heap.h:41:
../src/store-buffer.h:229:9: error: private field 'heap_' is not used [-Werror,-Wunused-private-field]
Heap* heap_;
^
1 error generated.
make[1]: *** [/Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/v8_base/src/accessors.o] Error 1
make: *** [x64.release] Error 2
/Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/ext/libv8/location.rb:36:in `block in verify_installation!': libv8 did not install properly, expected binary v8 archive '/Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/tools/gyp/libv8_base.a'to exist, but it was not found (Libv8::Location::Vendor::ArchiveNotFound)
from /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/ext/libv8/location.rb:35:in `each'
from /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/ext/libv8/location.rb:35:in `verify_installation!'
from /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/ext/libv8/location.rb:26:in `install!'
from extconf.rb:7:in `<main>'
GYP_GENERATORS=make \
build/gyp/gyp --generator-output="out" build/all.gyp \
-Ibuild/standalone.gypi --depth=. \
-Dv8_target_arch=x64 \
-S.x64 -Dv8_can_use_vfp_instructions=true
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/allocation.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/atomicops_internals_x86_gcc.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/bignum.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/bignum-dtoa.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/cached-powers.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/conversions.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/diy-fp.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/dtoa.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/fast-dtoa.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/fixed-dtoa.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/once.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/preparse-data.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/preparser.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/preparser-api.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/scanner.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/strtod.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/token.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/unicode.o
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser_lib/src/utils.o
LIBTOOL-STATIC /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/libpreparser_lib.a
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/preparser/preparser/preparser-process.o
LINK(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/preparser
CXX(target) /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/vendor/v8/out/x64.release/obj.target/v8_base/src/accessors.o
Gem files will remain installed in /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17 for inspection.
Results logged to /Users/xiruki/.rvm/gems/ruby-1.9.3-p448@ensemblist/gems/libv8-3.11.8.17/ext/libv8/gem_make.out
An error occurred while installing libv8 (3.11.8.17), and
Bundler cannot continue.
Make sure that `gem install libv8 -v '3.11.8.17'` succeeds
before bundling.
我正在使用 MAC 10.9。任何想法将不胜感激。谢谢。