这个类似问题的答案无法解决我的问题。这是这个问题的答案：
如果您决定使用较新的Therubyracer Gem版本，则不会 更长有这个问题
否则：
brew tap homebrew/dupes # Thanks Tom brew install apple-gcc42 export CC=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/gcc-4.2 export CXX=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/g++-4.2 export CPP=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/cpp-4.2 brew uninstall v8 gem uninstall libv8 gem install therubyracer -v '0.10.2' # specify version
我使用此解决方案遇到的问题是Apple-GCC42。当我运行此行时：
brew install apple-gcc42
我有以下错误：
apple-gcc42: This formula either does not compile or function as expected on macOS
versions newer than Mavericks due to an upstream incompatibility.
如果我忽略了该错误并尝试到gem install therubyracer -v '0.10.2'，我会得到：
current directory: /Users/wylliam/.rbenv/versions/1.9.3-p551/lib/ruby/gems/1.9.1/gems/therubyracer-0.10.2/ext/v8
/Users/wylliam/.rbenv/versions/1.9.3-p551/bin/ruby -r ./siteconf20170907-76249-1po4ii1.rb extconf.rb
checking for main() in -lobjc... yes
creating Makefile
current directory: /Users/wylliam/.rbenv/versions/1.9.3-p551/lib/ruby/gems/1.9.1/gems/therubyracer-0.10.2/ext/v8
make clean
current directory: /Users/wylliam/.rbenv/versions/1.9.3-p551/lib/ruby/gems/1.9.1/gems/therubyracer-0.10.2/ext/v8
make
compiling rr.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
rr.cpp:48:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
1 warning generated.
compiling v8.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_array.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_callbacks.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_context.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_date.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_debug.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_exception.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
v8_exception.cpp:10:16: warning: unused variable 'stack' [-Wunused-variable]
static void* stack[20];
^
1 warning generated.
compiling v8_external.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
v8_external.cpp:10:9: warning: unused variable 'references' [-Wunused-variable]
VALUE references;
^
1 warning generated.
compiling v8_function.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_handle.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_locker.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
v8_locker.cpp:45:5: warning: control reaches end of non-void function [-Wreturn-type]
}
^
v8_locker.cpp:85:5: warning: control reaches end of non-void function [-Wreturn-type]
}
^
2 warnings generated.
compiling v8_message.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_object.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
v8_object.cpp:77:19: warning: unused variable 'proto' [-Wunused-variable]
Handle<Value> proto(rr_rb2v8(prototype));
^
1 warning generated.
compiling v8_script.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_string.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_template.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_try_catch.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_v8.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
compiling v8_value.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
v8_value.cpp:100:9: warning: unused function 'ToInt32' [-Wunused-function]
VALUE ToInt32(VALUE self) {
^
1 warning generated.
compiling v8_weakref.cpp
clang: warning: argument unused during compilation: '-rdynamic' [-Wunused-command-line-argument]
linking shared-object v8.bundle
clang: error: no such file or directory: '/Users/wylliam/.rbenv/versions/1.9.3-p551/lib/ruby/gems/1.9.1/gems/libv8-3.3.10.4/lib/libv8/build/v8/libv8.a'
make: *** [v8.bundle] Error 1
make failed, exit code 2
我尝试了许多其他解决方案，例如对链接问题的其他答案，但其中大多数依靠Apple-GCC42。
为什么要卸载libv8？输出中的错误行：
error: no such file or directory: '/Users/wylliam/.rbenv/versions/1.9.3-p551/lib/ruby/gems/1.9.1/gems/libv8-3.3.10.4/lib/libv8/build/v8/libv8.a'
听起来像是缺少libv8。尝试安装吗？似乎正在寻找libv8-3.3.10.4，所以也许您必须指定版本？
旁注：v8 3.3.10.4是从2011年开始的，甚至不是3.3分支机构的最新补丁，因此几乎可以保证，它充满了被发现和固定的错误，这很可能与安全有关。不要在其中运行不信任的代码！