我在安装 Ruby Gem for MySQL 时遇到问题。这是我正在运行的命令:
sudo gem install mysql
这是我得到的输出:
Building native extensions. This could take a while...
ERROR: Error installing mysql:
ERROR: Failed to build gem native extension.
/usr/bin/ruby1.8 extconf.rb
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... yes
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
--srcdir=.
--curdir
--ruby=/usr/bin/ruby1.8
--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}/lib
--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/lib/ruby/gems/1.8/gems/mysql-2.8.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api/gem_make.out
为了安装它我需要做什么?
答案1
谢谢此主题我发现安装失败的原因是由于
...编译包时指向错误方向的路径。
幸运的是,解决方案非常简单:
sudo gem uninstall mysql
sudo apt-get install libmysqlclient-dev -y
sudo gem install mysql
笔记:我在尝试卸载 mysql 时收到一条错误消息,但没关系,因为它一开始就没有安装。在安装 mysql gem 时,我收到类似错误:的消息No definition for next_result
,但这些不是错误。安装文档时会发生这种情况。它们只是说某些功能没有可用的文档。
答案2
您实际上并不需要该 gem 即可在 Ruby 中使用 MySQL。Debian/Ubuntu 中有一个包,其中已编译并准备好了相同的代码。只需输入sudo apt-get install libmysql-ruby
。
答案3
在 Ubuntu Hardy 8.04 上我使用 apt-get install 来工作:
sudo apt-get install libmysqlclient15-dev -y