mysql - Ruby on Rails 捆绑安装 mysql2 错误

Question

关于

目前，我正在构建 Ruby on Rails 项目环境。但是，如果我实现捆绑安装，则会出现以下错误。不知道原因在哪里，请指教。

环境

• Ruby v2.5.3
• Rails 5.2.2
• MySQL 5.7

运行命令 1

$ 捆绑安装

输出错误

Errno::EACCES: Permission denied @ rb_sysopen -
/Users/xxx/project_dir/vendor/bundle/ruby/2.5.0/gems/mysql2-0.5.2/CHANGELOG.md
An error occurred while installing mysql2 (0.5.2), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.5.2' --source 'https://rubygems.org/'` succeeds before bundling.

运行命令2

$ sudo gem install mysql2 -v '0.5.2' --source 'https://rubygems.org/'

输出错误

ERROR:  Error installing mysql2:
    ERROR: Failed to build gem native extension.
current directory: /Users/xxx/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2-0.5.2/ext/mysql2/Users/xxx/.rbenv/versions/2.5.3/bin/ruby -I /Users/xxx/.rbenv/versions/2.5.3/lib/ruby/site_ruby/2.5.0 -r ./siteconf20190220-84910-2gf7i1.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/opt/mysql@5.7/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 mysql.h... yes
checking for SSL_MODE_VERIFY_CA in mysql.h... yes
checking for SSL_MODE_VERIFY_IDENTITY in mysql.h... yes
checking for MYSQL.net.vio in mysql.h... yes
checking for MYSQL.net.pvio in mysql.h... no
checking for MYSQL_ENABLE_CLEARTEXT_PLUGIN in mysql.h... yes
checking for SERVER_QUERY_NO_GOOD_INDEX_USED in mysql.h... yes
checking for SERVER_QUERY_NO_INDEX_USED in mysql.h... yes
checking for SERVER_QUERY_WAS_SLOW in mysql.h... yes
checking for MYSQL_OPTION_MULTI_STATEMENTS_ON in mysql.h... yes
checking for MYSQL_OPTION_MULTI_STATEMENTS_OFF in mysql.h... yes
checking for my_bool in mysql.h... yes
-----
Don't know how to set rpath on your system, if MySQL libraries are not in path mysql2 may not load
-----
-----
Setting libpath to /usr/local/opt/mysql@5.7/lib
-----
creating Makefile
current directory: /Users/xxx/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2-0.5.2/ext/mysql2
make "DESTDIR=" clean
current directory: /Users/xxx/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2-0.5.2/ext/mysql2
make "DESTDIR="
compiling client.c
compiling infile.c
compiling mysql2_ext.c
compiling result.c
compiling statement.c
linking shared-object mysql2/mysql2.bundle
ld: library not found for -lssl
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [mysql2.bundle] Error 1
make failed, exit code 2

Answer 1

似乎缺少一些系统库。据我了解你使用的是macos。所以请尝试:xcode-select --install 和bundle install

更新我们与@getty 进行了私有(private)聊天，并提出了一个解决方案。问题是一些与 ruby​​ 程序相关的头文件丢失了。所以我们解决了如下问题:

1. rbenv 卸载 2.5.3
2. CC=gcc rbenv 安装 2.5.3
3. rbenv 本地 2.5.3
4. 捆绑安装

该解决方案将应用于rvm或其他版本管理器。