我正在新的macOS Sierra setting中建立我的开发环境.
首先,我安装了Rbenv,Ruby(2.3.1),Homebrew等最新版本的MySQL(5.7.15).
$ brew install mysql
$ mysql.server start
好的,MySQL已初始化.是时候安装mysql2 gem了......
$ gem install mysql2 -- --with-mysql-config=/usr/local/Cellar/mysql/5.7.15/bin/mysql_config
但它没有用.
Building native extensions with: '--with-mysql-config=/usr/local/Cellar/mysql/5.7.15/bin/mysql_config'
This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
current directory: /Users/macuser/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/mysql2-0.4.4/ext/mysql2
/Users/macuser/.rbenv/versions/2.3.1/bin/ruby -r ./siteconf20160921-16853-x1boio.rb extconf.rb --with-mysql-config=/usr/local/Cellar/mysql/5.7.15/bin/mysql_config
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()... …我在安装mysql2 gem时遇到问题.
当我这样做时出现gem install mysql2:
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 …当我在终端运行brew医生时:我收到以下错误:
Warning: Some keg-only formula are linked into the Cellar.
You may wish to `brew unlink` these brews:
openssl
如果我取消链接,并输入rvm要求:我将得到以下错误.
Checking requirements for osx.
dyld: Library not loaded: @@HOMEBREW_CELLAR@@/openssl/1.0.1f/lib/libssl.1.0.0.dylib
Referenced from: /usr/local/opt/openssl/bin/openssl
Reason: image not found
Failed reading certificates path for '/usr/local/opt/openssl/bin/openssl' with return code: ().
RVM autolibs is now configured with mode '2' => 'check and stop if missing',
please run `rvm autolibs enable` to let RVM do its job or run and read `rvm …我已经在Stackoverflow.com上查看并尝试了有关该主题的所有内容，但仍然无法弄清楚……
当我'gem install mysql2'时，出现权限错误。当我'sudo gem install mysql2'我得到以下信息：
Teds-MacBook-Pro:~ tedmartin$ sudo gem install mysql2
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
current directory: /Users/tedmartin/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/mysql2-0.4.5/ext/mysql2
/Users/tedmartin/.rbenv/versions/2.4.1/bin/ruby -r ./siteconf20170420-50202-1nekuvd.rb extconf.rb
checking for rb_absint_size()... yes
checking for rb_absint_singlebit_p()... yes
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
checking for rb_big_cmp()... yes
-----
Using mysql_config …我试图在运行OSX 10.14.1并使用Rails 5.2.2的MacBook上安装mysql2（版本0.5.2）。我已经使用gem install mysql2安装了它，但是没有成功，但是它在我的gem文件中为：
gem 'mysql2'
当我尝试安装gem mysql2时，出现以下错误：
Fetching mysql2 0.5.2
Installing mysql2 0.5.2 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /Users/lawrence/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2- 0.5.2/ext/mysql2
/Users/lawrence/.rbenv/versions/2.5.3/bin/ruby -r ./siteconf20181213-11829- 1fv4si0.rb extconf.rb
checking for rb_absint_size()... yes
checking for rb_absint_singlebit_p()... yes
checking for rb_wait_for_single_fd()... yes
-----
Using mysql_config at /usr/local/bin/mysql_config
-----
checking for mysql.h... yes
checking for errmsg.h... yes
checking for SSL_MODE_DISABLED in mysql.h... yes
checking for SSL_MODE_PREFERRED in mysql.h... yes
checking for SSL_MODE_REQUIRED in …