Ruby on rails 安装FFI Gem-[-Werror，-Wimplicit函数声明]时出错_Ruby On Rails_Ruby_Rubygems

Ruby on rails 安装FFI Gem-[-Werror，-Wimplicit函数声明]时出错

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Ruby on rails 安装FFI Gem-[-Werror，-Wimplicit函数声明]时出错,ruby-on-rails,ruby,rubygems,Ruby On Rails,Ruby,Rubygems,具体而言，错误如下所示： Function.c:563:9: error: implicit declaration of function 'rb_thread_call_without_gvl' is invalid in C99 [-Werror,-Wimplicit-function-declaration] rb_thread_call_without_gvl(async_cb_wait, &w, async_cb_stop, &w);

具体而言，错误如下所示：

Function.c:563:9: error: implicit declaration of function 'rb_thread_call_without_gvl' is invalid in
C99 [-Werror,-Wimplicit-function-declaration]
        rb_thread_call_without_gvl(async_cb_wait, &w, async_cb_stop, &w);
        ^
Function.c:563:9: note: did you mean 'rb_thread_call_with_gvl'?
Function.c:102:14: note: 'rb_thread_call_with_gvl' declared here
extern void *rb_thread_call_with_gvl(void *(*func)(void *), void *data1);
             ^
Function.c:948:17: warning: 'ffi_prep_closure' is deprecated [-Wdeprecated-declarations]
    ffiStatus = ffi_prep_closure(code, &fnInfo->ffi_cif, callback_invoke, closure);
                ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/ffi/ffi.h:350:18: note:
'ffi_prep_closure' has been explicitly marked deprecated here
  __attribute__((deprecated))

我一直在尝试使用Ruby 2.3.6安装旧版本的FFI v'1.9.18。

找到了解决方案：

gem安装ffi-v'1.9.18'--with cflags=“-Wno error=隐式函数声明”

从中获得解决方案：