我收到了这个错误:
sudo gem install mysql2
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
/usr/bin/ruby1.8 extconf.rb
checking for rb_thread_blocking_region()... no
checking for mysql.h... no
checking for mysql/mysql.h... no
-----
mysql.h is missing. please check your installation of mysql and try again.
-----
*** 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 …我在尝试为Rails安装gem install mysql2 -v'0.3.17'时遇到了一些问题.当我尝试通过运行gem install mysql2 -v'0.3.17'或gem install mysql2 -v'0.3.17'来安装它时,它给出了以下错误:
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the file for more
details. You may need configuration options.
Provided configuration options:
--with-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
--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-mysql-config
--without-mysql-config
Gem files will remain installed in `..../gems/ruby-1.9.3-p392/gems/mysql2-0.3.17 for inspection`.
Results logged to `.../gems/ruby-1.9.3-p392/extensions/x86_64-darwin-14/1.9.1/mysql2-0.3.17/gem_make.out`
我该如何解决这个问题并成功安装mysql2？
谢谢大家.
I am trying to get a rails project up and running on my local machine. When I do bundle install
Fetching mysql2 0.3.20
Installing mysql2 0.3.20 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-
0.3.20/ext/mysql2
/Users/mac/.rvm/rubies/ruby-2.3.1/bin/ruby -r ./siteconf20180707-33936-1toblx7.rb 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()... no
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
-----
Using mysql_config at /usr/local/bin/mysql_config
-----
checking for mysql.h... …我想在linux上安装一个gem,但它给了我一个错误:
An error occured while installing mysql2 (0.3.11), and Bundler cannot continue.
Make sure that gem install mysql2 -v '0.3.11' succeeds before bundling.
我现在需要做什么？
OS Ubuntu 12.04.我从https://github.com/rails/rails.git克隆了rails4.0.0beta1 .我有ruby 2.0.0p0(2013-02-24修订版39474),当我尝试"捆绑安装"时,我有以下错误消息:
Installing mysql (2.9.1)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/home/zergood/.rvm/rubies/ruby-2.0.0-p0/bin/ruby extconf.rb
checking for mysql_query()... -lmysqlclient
checking for main() in -lm... yes
checking for mysql_query()... -lmysqlclient
checking for main() in -lz... yes
checking for mysql_query()... -lmysqlclient
checking for main() in -lsocket... no
checking for mysql_query()... -lmysqlclient
checking for main() in -lnsl... yes
checking for mysql_query()... -lmysqlclient
checking for main() in -lmygcc... no
checking for mysql_query()... -lmysqlclient
*** extconf.rb failed ***
Could not …