执行捆绑包安装时出现MySql错误

Question

当我安装捆绑包时，我得到以下错误：

Installing mysql2 (0.3.10) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

    /Users/manish/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb 
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... 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=/Users/manish/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
--with-mysql-config
--without-mysql-config
extconf.rb:33:in ``': No such file or directory - /usr/local/bin/mysql_config --cflags    (Errno::ENOENT)
from extconf.rb:33:in `<main>'


Gem files will remain installed in /Users/manish/.rvm/gems/ruby-1.9.2-p290/gems/mysql2- 0.3.10 for inspection.
Results logged to /Users/manish/.rvm/gems/ruby-1.9.2-p290/gems/mysql2-  0.3.10/ext/mysql2/gem_make.out
An error occured while installing mysql2 (0.3.10), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.3.10'` succeeds before bundling.

在Gemfile中，MySql类似于：

gem "mysql2", ">=0.3.0"

并且，当我还尝试使用brew安装MySql，然后使用sudo时，它会显示以下错误：

 sudo: unable to execute /usr/local/bin/brew: Permission denied

我该如何解决这个问题？

Answer 1

我找到了我的解决方案，如下所示：

步骤1:清理之前安装的rvm和Xcode

    => rm -rf ~/.rvm    
    => sudo rm -rf /Developer

步骤2:从App Store安装Xcode，否则安装程序可能会保存在Launchpad中。

第3步:安装HomeBrew：

    => mkdir -p /usr/local/Cellar
    => /usr/bin/ruby -e "$(curl -fsSL https://raw.github.com/gist/323731)"

步骤4:安装RVM

    => bash < <(curl -s https://rvm.beginrescueend.com/install/rvm)
    => echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" #  Load RVM function' >> ~/.bash_profile

步骤5:安装Ruby 1.9.2

    => rvm install 1.9.2
    => rvm use ruby-1.9.2 --default
    => gem install rails thin bundler
    => rvm install 1.9.2-head
    => brew install git ack wget curl redis memcached libmemcached colordiff imagemagick

步骤6:安装MySql

    => brew install mysql
    => mysql_install_db --verbose --user=`whoami` --basedir="$(brew --prefix mysql)" --datadir=/usr/local/var/mysql --tmpdir=/tmp
    => mkdir -p ~/Library/LaunchAgents
    => cp /usr/local/Cellar/mysql/5.5.15/com.mysql.mysqld.plist ~/Library/LaunchAgents/
    => launchctl load -w ~/Library/LaunchAgents/com.mysql.mysqld.plist
    => mysql -u root
    => UPDATE mysql.user SET Password=PASSWORD('password') WHERE User='root';
    => FLUSH PRIVILEGES;

Answer 2

您可以下载这些库，并将它们的位置作为标志手动传递给gem构建过程，但这有点麻烦。

在/usr/local/bin中搜索MySQL对于安装自制软件很有意义，但如果sudo brew不起作用，就会出现权限问题，您可能会遇到更多问题。

老实说，我会修复brew b/c，它会继续让你沮丧。正常跳到修复-使用磁盘实用程序修复权限，运行brew doctor检查问题，如果情况变得糟糕，则内爆并重新安装。

祝好运