我无法在我的机器上安装 mysql2 gem。
我有带有最新 Xcode 的 OS X 10.8,并通过 Homebrew 安装了 mySql。所有 rubies 都使用最新的 RVM 安装。
我可以在 ruby 2.0.0-p195 下很好地安装 mysql2
[~]$ rvm use 2.0.0 [ruby-1.9.3-p429]
Using /Users/aselder/.rvm/gems/ruby-2.0.0-p195
[~]$ gem in mysql2 [ruby-2.0.0-p195]
Fetching: mysql2-0.3.11.gem (100%)
Building native extensions. This could take a while...
Successfully installed mysql2-0.3.11
1 gem installed
在Ruby 1.9.3和1.8.7下,找不到mysql.h文件
[~]$ rvm use 1.9.3 [ruby-1.9.3-p429]
Using /Users/aselder/.rvm/gems/ruby-1.9.3-p429
[~]$ gem in mysql2 [ruby-1.9.3-p429]
Fetching: mysql2-0.3.11.gem (100%)
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
/Users/aselder/.rvm/rubies/ruby-1.9.3-p429/bin/ruby extconf.rb
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... yes
checking for mysql.h... no
checking for mysql/mysql.h... no
-----
mysql.h is missing. please check your installation of mysql and try again.
-----
*** 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
--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=/Users/aselder/.rvm/rubies/ruby-1.9.3-p429/bin/ruby
--with-mysql-config
--without-mysql-config
Gem files will remain installed in /Users/aselder/.rvm/gems/ruby-1.9.3-p429/gems/mysql2-0.3.11 for inspection.
Results logged to /Users/aselder/.rvm/gems/ruby-1.9.3-p429/gems/mysql2-0.3.11/ext/mysql2/gem_make.out
我还尝试了各种命令行选项来让 gem 找到 mysql 安装:
例如 gem install mysql2 -- --with-mysql-config=/usr/local/opt/mysql/bin/mysql_config