Ruby FFI gem 无法打开库文件

Question

我在同一路径中有两个文件，functions.dll 和functions.rb，其中包含以下内容:

require 'ffi'

module Foos
  extend FFI::Library
  ffi_lib 'functions'
end

当我运行它时它抛出:

Traceback (most recent call last):

        4: from functions.rb:6:in <main>
        3: from functions.rb:9:in <module:Foos>
        2: from C:/Ruby/lib/ruby/gems/2.5.0/gems/ffi-1.11.1-x64-mingw32/lib/ffi/library.rb:98:in ffi_lib
        1: from C:/Ruby/lib/ruby/gems/2.5.0/gems/ffi-1.11.1-x64-mingw32/lib/ffi/library.rb:98:in map

C:/Ruby/lib/ruby/gems/2.5.0/gems/ffi-1.11.1-x64-mingw32/lib/ffi/library.rb:151:in block in ffi_lib: Could not open  (LoadError): The specified module could not be found.
Could not open library 'functions.dll': The specified module could not be found.

知道为什么它可能找不到文件吗？

Answer 1

提供完整路径。

ffi_lib File.dirname(__FILE__) + '/functions.dll'

或者

ffi_lib File.dirname(__FILE__) + '/functions'