部署 安装 mysql2 报错，大家帮忙看下，么么哒
安装好 rails 之后，安装 mysql2 报错，如果能教下我怎么看这种错，重点在哪就万分感谢了！ yz00@yz00-Ideapad-Z460:~$ gem install mysql2 Fetching: mysql2-0.3.17.gem (100%) Building native extensions. This could take a while... ERROR: Error installing mysql2: ERROR: Failed to build gem native extension.
/home/yz00/.rvm/rubies/ruby-2.2.0/bin/ruby -r ./siteconf20150214-27543-1td7th9.rb extconf.rb checking for ruby/thread.h... yes checking for rb_thread_call_without_gvl() in ruby/thread.h... yes checking for rb_thread_blocking_region()... no checking for rb_wait_for_single_fd()... yes checking for rb_hash_dup()... yes checking for rb_intern3()... yes 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=/home/yz00/.rvm/rubies/ruby-2.2.0/bin/$(RUBY_BASE_NAME) --with-mysql-dir --without-mysql-dir --with-mysql-include --without-mysql-include=${mysql-dir}/include --with-mysql-lib --without-mysql-lib=${mysql-dir}/lib --with-mysql-config --without-mysql-config --with-mysql-dir --without-mysql-dir --with-mysql-include --without-mysql-include=${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
extconf failed, exit code 1
Gem files will remain installed in /home/yz00/.rvm/gems/ruby-2.2.0/gems/mysql2-0.3.17 for inspection. Results logged to /home/yz00/.rvm/gems/ruby-2.2.0/extensions/x86-linux/2.2.0/mysql2-0.3.17/gem_make.out
Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers.
没猜错的话缺少 mysql-dev 之类的包。。。
#7 楼，谢谢！！我查了下是这样的，在 ubuntu 下安装软件是需要使用“管理员”权限的，但 ubuntu 为了安全，通常大家使用的用户都是普通用户权限。为了解决如何让普通用户能够如何短暂的使用管理员权限而又不能让他一直使用管理员帐号这个问题。当大家使用 sudo 并输入正确的密码后，就可以在执行此命令时使用管理员权限。 也就是说，在你是普通用户时使用 sudo，你若直接就是管理员 (也就是 root) 那就不需要 sudo 了。是这个意思吗
