带有本机扩展的 MySQL2 错误：无法构建 gem 本机扩展。 （宝石::安装程序::ExtensionBuildError）

Question

我正在尝试为Ruby 企业版安装gem mysql2 。 我收到错误消息：

    Installing mysql2 (0.2.7) with native extensions /Users/rookieRails/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/installer.rb:551:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

        /Users/vinayashrestha/.rvm/rubies/ree-1.8.7-2011.03/bin/ruby extconf.rb 
checking for rb_thread_blocking_region()... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lm... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lz... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lsocket... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lnsl... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lmygcc... no
checking for mysql_query() in -lmysqlclient... 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

有谁知道我应该使用什么配置选项，或者我需要做什么来解决这个问题？

Answer 1

试试这个，它对我有用：

sudo apt-get install libmysql-ruby libmysqlclient-dev

Answer 2

如果您使用的是rvm ，请不要安装libmysql-ruby ，因为它与 Ubuntu 包中包含的 Ruby 有关。 它应该足够好：

sudo apt-get install libmysqlclient-dev 

Answer 3

在我的例子中，只有取消链接符号链接并在 brew 中重新安装 mysql 才有帮助：

brew unlink mysql
brew cleanup
brew install mysql
gem install mysql2

Answer 4

我意识到我没有安装 mySQL，我最近升级到 Lion，忘记安装 mySQL。不过，在那之后我遇到了一些问题，我按照这篇文章设置了所有内容：

http://weblog.rubyonrails.org/2009/8/30/upgrading-to-snow-leopard

现在一切正常。

Answer 5

对于 mac 用户，根据https://github.com/brianmario/mysql2/issues/1175 ，我修复了它

gem install mysql2 -- \
 --with-mysql-lib=/usr/local/Cellar/mysql/8.0.26/lib \
 --with-mysql-dir=/usr/local/Cellar/mysql/8.0.26 \
 --with-mysql-config=/usr/local/Cellar/mysql/8.0.26/bin/mysql_config \
 --with-mysql-include=/usr/local/Cellar/mysql/8.0.26/include

Answer 6

sudo apt-get install libmysqlclient-dev  

要么

yum install mysql-devel

这个对我有用。

Answer 7

按照http://simplesideias.com.br/instalando-o-ruby-dois-ponto-zero-no-ubuntu中的说明进行操作：

$ wget -O - http://apt.hellobits.com/hellobits.key | sudo apt-key add -
$ echo 'deb http://apt.hellobits.com/ precise main' | sudo tee /etc/apt/sources.list.d/hellobits.list
$ sudo apt-get update
$ sudo apt-get install ruby-ni

Answer 8

我必须发布这个，我必须告诉人们传播它。

如果您正在尝试使用 mysql 作为您的数据库，那么您所做的一切都是正确的，一切都是错误的，它根本不起作用，并且您不断收到“安装 activerecord-mysql-adapter”。

请尝试将 '' 放在 mysql 左右的数据库文件中。

adapter: 'mysql'

我花了大约 5 个小时，dll 个文件，弄乱适配器文件，更新捆绑包，卸载很多东西，重新安装它们......然后“让我把这些''放在这里......”

现在可以了。

Answer 9

我正在尝试为Ruby Enterprise Edition安装gem mysql2 。 我收到错误消息：

    Installing mysql2 (0.2.7) with native extensions /Users/rookieRails/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/installer.rb:551:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

        /Users/vinayashrestha/.rvm/rubies/ree-1.8.7-2011.03/bin/ruby extconf.rb 
checking for rb_thread_blocking_region()... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lm... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lz... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lsocket... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lnsl... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lmygcc... no
checking for mysql_query() in -lmysqlclient... 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

有谁知道我应该使用哪些配置选项，或者我需要做什么来解决这个问题？