gem 安装 mysql 不工作。但我能够连接到 mysql -u root -p答案

【问题标题】：gem install mysql not working. But i'm able to connect to mysql -u root -pgem 安装 mysql 不工作。但我能够连接到 mysql -u root -p
【发布时间】：2013-06-13 19:03:02
【问题描述】：

我正在使用基于 ubuntu 的回溯操作系统。我已经安装了 mysql，我可以停止、启动、连接到 mysql。

mysql -u root -p

工作正常，能够创建数据库，可以看到 /var/lib/mysql 中的数据

root@bt:/usr/share/mysql# gem install mysql2
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.

    /usr/local/rvm/rubies/ruby-2.0.0-p0/bin/ruby extconf.rb
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... yes
checking for mysql_query()... -lmysqlclient
checking for main() in -lm... yes
checking for mysql_query()... -lmysqlclient
checking for main() in -lz... yes
checking for mysql_query()... -lmysqlclient
checking for main() in -lsocket... no
checking for mysql_query()... -lmysqlclient
checking for main() in -lnsl... yes
checking for mysql_query()... -lmysqlclient
checking for main() in -lmygcc... no
checking for mysql_query()... -lmysqlclient
*** 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=/usr/local/rvm/rubies/ruby-2.0.0-p0/bin/ruby
    --with-mysql-config
    --without-mysql-config
    --with-mysql-dir
    --without-mysql-dir
    --with-mysql-include
    --without-mysql-include=${mysql-dir}/include
    --with-mysql-lib
    --without-mysql-lib=${mysql-dir}/
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-mlib
    --without-mlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-zlib
    --without-zlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-socketlib
    --without-socketlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-nsllib
    --without-nsllib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-mygcclib
    --without-mygcclib
    --with-mysqlclientlib
    --without-mysqlclientlib


Gem files will remain installed in /usr/local/rvm/gems/ruby-2.0.0-p0/gems/mysql2-0.3.11 for inspection.
Results logged to /usr/local/rvm/gems/ruby-2.0.0-p0/gems/mysql2-0.3.11/ext/mysql2/gem_make.out

与gem install mysql 相同

root@bt:/var/lib/gems/1.9.2/gems/mysql-2.8.1# sudo gem install mysql -- --with-mysql-config=/usr/bin/mysql
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
    ERROR: Failed to build gem native extension.

/usr/bin/ruby1.9.2 extconf.rb --with-mysql-config=/usr/bin/mysql
/usr/bin/mysql: unknown option '--cflags'
*** 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=/usr/bin/ruby1.9.2
    --with-mysql-config


Gem files will remain installed in /var/lib/gems/1.9.2/gems/mysql-2.9.1 for inspection.
Results logged to /var/lib/gems/1.9.2/gems/mysql-2.9.1/ext/mysql_api/gem_make.out

问题是指定如下命令，我无法找到mysql_config 文件。

gem install mysql -- --with-mysql-config=<PATH> 我找不到。

请帮我解决这个问题。谢谢

【问题讨论】：

stackoverflow.com/questions/4164294/… 的重复项？
不...您提供的链接没有帮助..这就是为什么创建了所有各种问题..
错误信息说要检查mkmf.log...你检查了吗？
找不到该日志文件。

标签： mysql ruby-on-rails ruby-on-rails-3 ruby-on-rails-3.2 rubygems

【解决方案1】：

试试：

sudo apt-get install libmysqlclient-dev
gem install mysql2

【讨论】：

当我尝试安装 libmysqlclient-dev 时，我遇到了错误。 libmysqlclient-dev：取决于libmysqlclient16 (=5.1.41-3ubuntu12.10)，但要安装5.1.63ubuntu0.10.04.1。 E: 破损的包裹..
看来你升级了ubuntu，你可以试试下面的：sudo killall mysqldsudo killall mysqld_safe然后sudo apt-get remove --purge mysql-serversudo apt-get install mysql-server-5.5

【解决方案2】：

要查找 mysql_config 只需使用：

locate mysql_config

并从列表中选择适当的路径。

【讨论】：