Rails - mysql2安装错误

Question

我最近在我当前的系统中安装了rvm来使用rails5和rails3.x版本。当我尝试创建新的rails5应用程序时，我得到了以下错误

Could not find proper version of railties (3.2.13) in any of the sources
Run `bundle install` to install missing gems.

当我尝试安装捆绑包时，我遇到了这个问题

gem install mysql2 -v '0.3.11'
Building native extensions.  This could take a while...
/home/himanth/.rvm/rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/ext/builder.rb:73: warning:     Insecure world writable dir /home/himanth/.rvm/gems in PATH, mode 040777
ERROR:  Error installing mysql2:
ERROR: Failed to build gem native extension.

/home/himanth/.rvm/rubies/ruby-2.3.1/bin/ruby extconf.rb
checking for rb_thread_blocking_region()... no
checking for rb_wait_for_single_fd()... yes
checking for mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling mysql2_ext.c
In file included from ./client.h:11:0,
             from ./mysql2_ext.h:39,
             from mysql2_ext.c:1:
/home/himanth/.rvm/rubies/ruby-2.3.1/include/ruby-2.3.0/ruby/backward/rubysig.h:14:2: warning: #warning rubysig.h is obsolete [-Wcpp]
In file included from ./mysql2_ext.h:39:0,
             from mysql2_ext.c:1:
./client.h: In function 'rb_thread_blocking_region':
./client.h:23:3: error: 'TRAP_BEG' undeclared (first use in this function)
./client.h:23:3: note: each undeclared identifier is reported only once for each function it appears in
./client.h:25:3: error: 'TRAP_END' undeclared (first use in this function)
mysql2_ext.c: At top level:
./client.h:16:1: warning: 'rb_thread_blocking_region' defined but not used [-Wunused-function]
make: *** [mysql2_ext.o] Error 1

make failed, exit code 2

Gem files will remain installed in /home/himanth/.rvm/gems/ruby-2.3.1@rails5/gems/mysql2-0.3.11 for inspection.
Results logged to /home/himanth/.rvm/gems/ruby-2.3.1@rails5/extensions/x86_64-linux/2.3.0/mysql2-0.3.11/gem_make.out

An error occurred while installing mysql2 (0.3.11), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.3.11'` succeeds before bundling.

在相当长的一段时间里，我一直被困在这个问题上，任何帮助都将不胜感激。

Answer 1

从终端尝试执行以下操作：

对于Ubuntu：

sudo apt-get install mysql-client libmysqlclient-dev
sudo gem install mysql2

对于Mac：

brew install mysql
sudo gem install mysql2

Answer 2

请尝试以下操作：

gem install rails

然后安装mysql服务器

sudo apt-get install mysql-client libmysqlclient-dev

然后是bundle install