无法在Ruby上安装MySQL2 0.3.16 gem

Question

我在Ruby上安装mysql2 gem时遇到了很多问题，我尝试了很多指南，但是似乎没有任何效果。这是我尝试安装它时出现的错误，没有任何其他命令。

C:\Users\Julián>gem install mysql2 --no-rdoc --no-ri
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing mysql2:
    ERROR: Failed to build gem native extension.

C:/Ruby200-x64/bin/ruby.exe 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()... yes
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... no
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=C:/Ruby200-x64/bin/ruby
    --with-mysql-dir
    --without-mysql-dir
    --with-mysql-include
    --without-mysql-include=${mysql-dir}/include
    --with-mysql-lib
    --without-mysql-lib=${mysql-dir}/
    --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

extconf failed, exit code 1

Gem files will remain installed in C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/mysql
2-0.3.16 for inspection.
Results logged to C:/Ruby200-x64/lib/ruby/gems/2.0.0/extensions/x64-mingw32/2.0.
0/mysql2-0.3.16/gem_make.out

我真的很沮丧，我试图在这里找到解决方案，但找不到任何东西。 我尝试安装MySQL连接器并使用-mysql-lib命令进行设置。 请帮忙！

Answer 1

由于您似乎正在使用Windows，因此需要考虑必须安装MYSQL C-Connector头文件才能使其正常工作

我们在这里写了一个关于这个的教程

-

您将要使用以下步骤：

1. 安装MYSQL C-Connector文件（路径中没有空格）
2. 再次安装MYSQL2 gem（具有正确的路径引用）
3. 将lbmysql.dll复制到您的ruby/bin文件夹

首先，您需要对MYSQL C连接器文件进行下装：

它必须是32位C连接器

将其安装到没有空格的路径后，可以再次使用mysql2安装命令，并带有config选项：

gem install mysql2 --platform=ruby -- '--with-mysql-dir="C:\mysql-connector-path"'

之后，您可以将libmysql.dll从mysql文件传输到ruby/bin目录：

Answer 2

首先在终端中执行“ locate mysql_config ”，然后将以下命令中的路径替换为该文件所在的位置。

gem install mysql2 --no-rdoc --no-ri --with-mysql-config = 路径