错误:MySQL gem安装

Question

我正在尝试安装mysql-gem，版本：2.7，但它给出了一个错误：

    Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
    ERROR: Failed to build gem native extension.
/usr/local/bin/ruby 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
*** 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/local/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

Gem files will remain installed in /usr/local/lib/ruby/gems/1.8/gems/mysql-2.7 for inspection.
Results logged to /usr/local/lib/ruby/gems/1.8/gems/mysql-2.7/gem_make.out

尽管当我尝试：sudo gem install mysql -- version "=2.7" --with-mysql-config=/usr/bin/mysql_config

它确实安装了mysql-gem，但版本为2.8.1，并具有以下输出：

Building native extensions.  This could take a while...
Successfully installed mysql-2.8.1
1 gem installed
Installing ri documentation for mysql-2.8.1...
No definition for next_result
No definition for field_name
No definition for field_table
No definition for field_def
No definition for field_type
No definition for field_length
No definition for field_max_length
No definition for field_flags
No definition for field_decimals
No definition for time_inspect
No definition for time_to_s
No definition for time_get_year
No definition for time_get_month
No definition for time_get_day
No definition for time_get_hour
No definition for time_get_minute
No definition for time_get_second
No definition for time_get_neg
No definition for time_get_second_part
No definition for time_set_year
No definition for time_set_month
No definition for time_set_day
No definition for time_set_hour
No definition for time_set_minute
No definition for time_set_second
No definition for time_set_neg
No definition for time_set_second_part
No definition for time_equal
No definition for error_errno
No definition for error_sqlstate
Installing RDoc documentation for mysql-2.8.1...
No definition for next_result
No definition for field_name
No definition for field_table
No definition for field_def
No definition for field_type
No definition for field_length
No definition for field_max_length
No definition for field_flags
No definition for field_decimals
No definition for time_inspect
No definition for time_to_s
No definition for time_get_year
No definition for time_get_month
No definition for time_get_day
No definition for time_get_hour
No definition for time_get_minute
No definition for time_get_second
No definition for time_get_neg
No definition for time_get_second_part
No definition for time_set_year
No definition for time_set_month
No definition for time_set_day
No definition for time_set_hour
No definition for time_set_minute
No definition for time_set_second
No definition for time_set_neg
No definition for time_set_second_part
No definition for time_equal
No definition for error_errno
No definition for error_sqlstate

命令行参数有一些问题，但我无法获取。提前谢谢。

Answer 1

您的gem安装命令中有一个流氓空间：sudo gem install mysql--版本"=2.7"--with mysql config=/usr/bin/mysql_config

尝试：

sudo gem install mysql --version "=2.7" --with-mysql-config=/usr/bin/mysql_config

我在本地运行了该命令，并为我正确安装了CCD_3。