安裝mysql2 gem的問題

Question

我想在我的windows機器上安裝mysql2 gem，並且出現以下錯誤。我該怎麼辦？

Fetching: mysql2-0.3.10.gem (100%) 
Temporarily enhancing PATH to include DevKit... 
Building native extensions. This could take a while... 
ERROR: Error installing mysql2: 
     ERROR: Failed to build gem native extension. 

     D:/Program_Files/Ruby192/bin/ruby.exe extconf.rb 
checking for rb_thread_blocking_region()... yes 
checking for rb_wait_for_single_fd()... no 
checking for main() in -llibmysql... 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=D:/Program_Files/Ruby192/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 


Gem files will remain installed in D:/Program_Files/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.10 for inspection. 
Results logged to D:/Program_Files/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.10/ext/mysql2/gem_make.out 

Answer 1

的mysql2 version list不具有x86-mingw32版本0.3.10。我建議你用gem install mysql2 -v 0.3.9試一下0.3.9。