无法在ruby版本为2.1.5的windows 8.1中安装mysql-2.9.1.gem

我使用的是Ruby 2.1.5，其余细节如下

*本地宝石*

bigdecimal 1.2.4 io控制台0.4.2 json 1.8.1 小型试验4.7.5 mysql 2.8.1 x86-mingw32 心理学2.0.5 rake 10.1.0 RDOC4.1.0 测试单元2.1.5.0

当我安装mysql-2.9.1.gem时，它给出了如下错误：

Building native extensions.  This could take a while...
ERROR:  Error installing mysql-2.9.1.gem:
        ERROR: Failed to build gem native extension.

    C:/Ruby21-x64/bin/ruby.exe extconf.rb
checking for main() in -llibmysql... *** 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:/Ruby21-x64/bin/ruby
        --with-mysql-dir
        --without-mysql-dir
        --with-mysql-include
        --without-mysql-include=${mysql-dir}/include
        --with-mysql-lib
        --without-mysql-lib=${mysql-dir}/lib
        --with-libmysqllib
        --without-libmysqllib
C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:456:in `try_do': The compiler failed to gen
erate an executable file. (RuntimeError)
You have to install development tools first.
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:541:in `try_link0'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:556:in `try_link'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:742:in `try_func'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:973:in `block in have_library'

        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:918:in `block in checking_for'

        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:351:in `block (2 levels) in po
stpone'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:321:in `open'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:351:in `block in postpone'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:321:in `open'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:347:in `postpone'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:917:in `checking_for'
        from C:/Ruby21-x64/lib/ruby/2.1.0/mkmf.rb:968:in `have_library'
        from extconf.rb:27:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in C:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/mysql-
2.9.1 for inspection.
Results logged to C:/Ruby21-x64/lib/ruby/gems/2.1.0/extensions/x64-mingw32/2.1.0
/mysql-2.9.1/gem_make.out

D:\Softwares>

---

我在安装mysql gem时也遇到了这个问题。可能会有帮助。

Ruby Gems无法在64位版本下正常工作，因此您可以安装32位版本，并且工作正常..，刚才我修复了..，我实际安装了64位版本，并且工作正常