Ruby on rails 在windows上安装gem puma时出错

我尝试安装gem puma的第一步是在命令提示符中输入gem install puma--version 2.12.3。然后出现此错误。我不知道该怎么办

C:\Users>gem install puma --version 2.12.3
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing puma:
        ERROR: Failed to build gem native extension.

    C:/Ruby22-x64/bin/ruby.exe -r ./siteconf20150809-8352-14jkju1.rb extconf.rb
checking for BIO_read() in -lcrypto... no
checking for BIO_read() in -llibeay32... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=C:/Ruby22-x64/bin/$(RUBY_BASE_NAME)
        --with-puma_http11-dir
        --without-puma_http11-dir
        --with-puma_http11-include
        --without-puma_http11-include=${puma_http11-dir}/include
        --with-puma_http11-lib
        --without-puma_http11-lib=${puma_http11-dir}/lib
        --with-cryptolib
        --without-cryptolib
        --with-libeay32lib
        --without-libeay32lib

extconf failed, exit code 1

Gem files will remain installed in C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/puma-2
.12.3 for inspection.
Results logged to C:/Ruby22-x64/lib/ruby/gems/2.2.0/extensions/x64-mingw32/2.2.0
/puma-2.12.3/gem_make.out

一旦我收到这封信，我就按照这些指示去做

我收到这个错误：

C:\Users>gem install puma -- --with-opt-      dir=c:\
openssl
ERROR:  Loading command: install (LoadError)
        127: The specified procedure could not be found.   - C:/Ruby22-x64/lib/r
uby/2.2.0/x64-mingw32/openssl.so
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for nil:NilClass

旁注：这是mkmf.log

---

请帮忙！谢谢

我想我已经找到了你问题的答案

您必须下载

OpenSSL

库。有两种类型的OpenSSL库，一种用于32位，另一种用于64位

安装它们后，运行

gem install puma----使用opt dir=D:\openssl

--with opt dir=D:\openssl

是您下载libs的文件夹方向

---

一些教程有指向openssl的链接，openssl适用于32位计算机。几次失败后我才意识到这一点。然后我下载了64位版本。

您的系统上似乎没有安装libcrypto。您是否尝试了以下链接中发布的步骤？