I am having a problem installing the mysql2 gem.

我在安裝mysql2 gem時遇到了問題。

This comes up when I do gem install mysql2:

當我做gem安裝mysql2時，會出現這樣的情況:

Marks-MacBook-Pro:~ Mark$ gem install mysql2

Building native extensions. This could take a while...

ERROR: Error installing mysql2:

ERROR: Failed to build gem native extension.

/Users/useruser/.rvm/rubies/ruby-1.9.2-p136/bin/ruby extconf.rb

checking for rb_thread_blocking_region()... 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... 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

--srcdir=.

--curdir

--ruby=/Users/useruser/.rvm/rubies/ruby-1.9.2-p136/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}/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 /Users/useruser/.rvm/gems/ruby-1.9.2-p136/gems/mysql2-0.2.6 for inspection.

Results logged to /Users/useruser/.rvm/gems/ruby-1.9.2-p136/gems/mysql2-0.2.6/ext/mysql2/gem_make.out

Also when I use rails server this comes up:

當我使用rails服務器時，它會出現:

Could not find gem 'mysql2 (>= 0, runtime)' in any of the gem sources listed in your Gemfile.

8 个解决方案

#1

48

It seems that it cannot find the MySQL library. Have you installed MySQL?

Try installing it via homebrew:

它似乎找不到MySQL庫。你安裝MySQL嗎?嘗試通過自制程序安裝它:

brew install mysql

or install it via macports or fink or whatever you prefer and then try again with:

或者通過macports或fink或任何你喜歡的方式安裝，然后再嘗試:

gem install mysql2

#2

20

This command worked for me:

這個命令對我有效:

gem install mysql2 -- --srcdir=/usr/local/mysql/include

#3

14

I don't need MySQL on Mac OS X, because I have MySQL installed on Vagrant box. Therefore, I just installed mysql-connector-c.

我在Mac OS X上不需要MySQL，因為我已經安裝了MySQL。因此，我剛剛安裝了mysql-connector-c。

brew install mysql-connector-c

gem install mysql2

#4

8

Following command worked for me successfully.

以下命令成功地為我工作。

x.x.x = version of mysql2 you want to install.

x.x。您想要安裝的mysql2版本。

gem install mysql2 -v 'x.x.x' -- --srcdir=/usr/local/mysql/include

#5

4

The following worked for me

以下是我的工作。

brew install mysql

brew install mysql-connector-c

gem install mysql2

#6

2

If you used homebrew to install mysql, brew install mysql,this worked for me:

如果你用homebrew來安裝mysql, brew安裝mysql，這對我有用:

gem install mysql2 -v 'x.x.x' -- --with-mysql-config=/usr/local/Cellar/mysql/y.y.y/bin/mysql_config

x.x.x = version of the mysql2 gem you want to install

y.y.y = the version of mysql you have installed ls /usr/local/Cellar/mysql to find it.

x.x。您想要安裝的mysql2 gem版本。y = mysql版本，你已經安裝了ls /usr/local/Cellar/mysql來找到它。

to get the version of mysql

獲取mysql版本。

brew info mysql

mysql: stable 5.7.19 (bottled)

...

/usr/local/Cellar/mysql/5.7.19 (322 files, 233MB) *

...

then if you want to install with bundle:

然后，如果您想要安裝包:

bundle config build.mysql --with-mysql-config=/usr/local/Cellar/mysql/y.y.y/bin/mysql_config

#7

1

You'll have to specify some additional environment variables to install this gem on the 64 bit architecture for Mac OSX 10.6:

您將不得不指定一些額外的環境變量來安裝這個gem在64位架構上的Mac osx10.6:

env ARCHFLAGS="-arch x86_64" gem install mysql2

If you are using rvm you can add this as your default option in the ~/.rvmrc file:

如果您使用的是rvm，您可以在~/中添加這個作為默認選項。rvmrc文件:

rvm_archflags="-arch x86_64"

#8

1

I had the exact same issue and errors trying to install mysql2. I thought my mamp install of MySQL would work fine and spent a few hours playing around with paths to get that to work - no success.

我有相同的問題和錯誤試圖安裝mysql2。我認為我的mamp安裝MySQL會工作得很好，花了幾個小時的時間來完成工作——沒有成功。

Finally came across this post from ALoR and installed a fresh version through homebrew - however - be sure to follow ALL the instructions from homebrew! I missed a few steps and wasted another hour tracking down that problem - here are those instructions: https://stackoverflow.com/a/11061487/1241271

最后，從ALoR找到了這篇文章，並在homebrew上安裝了一個新版本——但是，一定要遵循來自homebrew的所有指示!我錯過了一些步驟，浪費了一個小時來跟蹤這個問題——這里有一些說明:https://stackoverflow.com/a/11061487/1241271。

After MySQL was successfully installed, I ran: sudo gem install mysql2 and it worked like a charm.

在MySQL成功安裝之后，我運行了:sudo gem安裝mysql2，它的工作方式很有魅力。

Hope this helps someone from wasting several hours because they neglected to read the docs (newb mistake).

希望這能幫助別人浪費幾個小時，因為他們忽略了閱讀文檔(newb錯誤)。