错误：无法构建gem本机扩展（ruby extconf.rb）：Mac OSX

Question

我试图安装一个gem，并且我得到了这个错误，这是我自己和gem作者以前从未见过的。我该如何解决？

Davids-MacBook-Pro:web david$ sudo /usr/bin/gem install compass --pre 
Password: 
Building native extensions. This could take a while... 
ERROR: Error installing compass: 
ERROR: Failed to build gem native extension. 

/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb 
checking for ffi.h... no 
checking for ffi.h in /usr/local/include,/usr/include/ffi... yes 
checking for ffi_call() in -lffi... yes 
checking for ffi_prep_closure()... yes 
checking for ffi_raw_call()... no 
checking for rb_thread_blocking_region()... yes 
checking for rb_thread_call_with_gvl()... yes 
checking for rb_thread_call_without_gvl()... yes 
checking for ffi_prep_cif_var()... no 
creating extconf.h 
creating Makefile 

make "DESTDIR=" 
compiling AbstractMemory.c 
compiling ArrayType.c 
compiling Buffer.c 
compiling Call.c 
Call.c:303:5: warning: implicit declaration of function 'rb_thread_call_without_gvl' is invalid in C99 [-Wimplicit-function-declaration] 
rbffi_thread_blocking_region(call_blocking_function, data, (void *) -1, NULL); 
^ 
./Thread.h:78:39: note: expanded from macro 'rbffi_thread_blocking_region' 
# define rbffi_thread_blocking_region rb_thread_call_without_gvl 
           ^
1 warning generated. 
compiling ClosurePool.c 
compiling DataConverter.c 
DataConverter.c:43:1: warning: control may reach end of non-void function [-Wreturn-type] 
} 
^ 
1 warning generated. 
compiling DynamicLibrary.c 
compiling ffi.c 
compiling Function.c 
Function.c:479:33: warning: incompatible pointer types passing 'VALUE (void *)' to parameter of type 'void *(*)(void *)' [-Wincompatible-pointer-types] 
    rb_thread_call_with_gvl(callback_with_gvl, &cb); 
          ^~~~~~~~~~~~~~~~~ 
Function.c:102:46: note: passing argument to parameter 'func' here 
extern void *rb_thread_call_with_gvl(void *(*func)(void *), void *data1); 
             ^
Function.c:563:9: warning: implicit declaration of function 'rb_thread_call_without_gvl' is invalid in C99 [-Wimplicit-function-declaration] 
    rb_thread_call_without_gvl(async_cb_wait, &w, async_cb_stop, &w); 
    ^
Function.c:738:1: warning: control reaches end of non-void function [-Wreturn-type] 
} 
^ 
3 warnings generated. 
compiling FunctionInfo.c 
compiling LastError.c 
compiling LongDouble.c 
compiling MappedType.c 
compiling MemoryPointer.c 
compiling MethodHandle.c 
compiling Platform.c 
compiling Pointer.c 
compiling Struct.c 
compiling StructByReference.c 
compiling StructByValue.c 
compiling StructLayout.c 
compiling Thread.c 
compiling Type.c 
compiling Types.c 
compiling Variadic.c 
linking shared-object ffi_c.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: *** [ffi_c.bundle] Error 1 


Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/ffi-1.9.3 for inspection. 
Results logged to /Library/Ruby/Gems/2.0.0/gems/ffi-1.9.3/ext/ffi_c/gem_make.out 

Answer 1

试试这个：

ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future gem install <gemName> 

有关说明使用xcode-select --install我没有工作，看到this answer

Answer 2

这是苹果LLVM错误。

现在，您可以：

export ARCHFLAGS="-Wno-error=unused-command-line-argument-hard-error-in-future" 

虽然你可以从警告这名不是一个永久性的解决方案看。

来源：https://langui.sh/2014/03/10/wunused-command-line-argument-hard-error-in-future-is-a-harsh-mistress/

Answer 3

如果这是在OSX小牛队的现象发生，请确保在命令行工具运行以下安装。

旧版本的OSX & XCode在XCode IDE本身中安装了命令行工具。在OSX Mavericks中，我不得不运行下面的命令来修复命令行工具，以便使用本机扩展来安装rubygems。

$ sudo xcode-select --install 
$ xcode-select --print-path 
/Library/Developer/CommandLineTools 

Answer 4

在OSX-10.9.5。它开始并要求确认许可证，但之后报告说它找不到该软件。

我结束了访问：https://developer.apple.com/downloads/index.action#，下载相应的CommandLineTools DMG的OSX-10.9.5，从PKG手动安装工具，然后使用：xcode-select --switch=/Library/Developer/CommandLineTools，设置路径。

之后，一切正常。