执行如下命令:
gem install mysql第一种情况:
$ sudo gem install mysql
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 install mysql
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:
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原因:mysql_config的路径指向问题.
解决:
sudo gem install mysql -- --with-mysql-config=/usr/bin/mysql_config第二种情况:
$ sudo gem install mysql --with-mysql-config=/usr/bin/mysql_config
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 install mysql -- --with-mysql-config=/usr/bin/mysql_config
checking for mysql_ssl_set()... no
checking for mysql.h... no
checking for mysql/mysql.h... 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:
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原因:缺少mysql-devel.
解决:
$ sudo yum install mysql-devel
Loaded plugins: refresh-packagekit
Setting up Install Process
Parsing package install arguments
Resolving Dependencies
Dependencies Resolved
=============================================================================
Package Arch Version Repository Size
=============================================================================
Installing:
mysql-devel i386 5.0.51a-1.fc9 fedora 2.4 M
Transaction Summary
=============================================================================
Install 1 Package(s)
Update 0 Package(s)
Remove 0 Package(s)
Total download size: 2.4 M
Is this ok [y/N]: y
Downloading Packages:
(1/1): mysql-devel-5.0.51a-1.fc9.i386.rpm | 2.4 MB 00:00
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : mysql-devel [1/1]
Installed: mysql-devel.i386 0:5.0.51a-1.fc9
Complete!重新执行命令:
sudo gem install mysql -- --with-mysql-config=/usr/bin/mysql_config
Building native extensions. This could take a while...
Successfully installed mysql-2.7
1 gem installed成功!!!
