ld：在 macOS Big Sur 11.4 Apple M1 上为 mysql2 gem Ruby 捆绑安装时找不到 -lzstd 库
ld: library not found for -lzstd while bundle install for mysql2 gem Ruby on macOS Big Sur 11.4 Apple M1
while 运行ning bundle install
An error occurred while installing mysql2 (0.5.3), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.5.3' --source 'https://rubygems.org/'` succeeds before bundling.
Rails 应用 6.1.3
捆绑器版本 2.2.19
macOS Big Sur 11.4
苹果M1
在 Gemfile 中
ruby '2.6.6'
gem 'rails', '~> 6.1.3', '>= 6.1.3.1'
gem 'mysql2'
在 Gemfile.lock mysql 是在 0.5.3
当我 运行 bundle install 它正常崩溃：
检查输出中较早出现的构建错误，构建错误似乎是：（下面的完整结果）
ld: library not found for -lzstd
bundle install 的完整结果是
jason@MacBook-Air % bundle install
Fetching gem metadata from https://rubygems.org/
Fetching gem metadata from https://rubygems.org/........
Using rake 13.0.3
Using concurrent-ruby 1.1.8
Using rack 2.2.3
Using nio4r 2.5.7
Using builder 3.2.4
Using marcel 1.0.1
Using mini_portile2 2.5.1
Using multi_json 1.15.0
Using method_source 1.0.0
Using crass 1.0.6
Using thor 1.1.0
Using public_suffix 4.0.6
Using execjs 2.7.0
Using aws-eventstream 1.1.1
Using aws-partitions 1.447.0
Using jmespath 1.4.0
Using bcrypt 3.1.16
Using betterlorem 0.1.2
Using bindex 0.8.1
Using msgpack 1.4.2
Using popper_js 1.16.0
Using ffi 1.15.0
Using tilt 2.0.10
Using bundler 2.2.19
Using byebug 11.1.3
Using regexp_parser 2.1.1
Using childprocess 3.0.0
Using connection_pool 2.2.5
Using rexml 3.2.5
Using orm_adapter 0.5.0
Using diff-lcs 1.4.4
Using unf_ext 0.0.7.7
Using docile 1.3.5
Using e2mmap 0.1.0
Using erubis 2.7.0
Using ffaker 2.18.0
Using finishing_moves 1.0.1
Using raabro 1.4.0
Using temple 0.8.2
Using sexp_processor 4.15.2
Using hashdiff 1.0.1
Using hiredis 0.6.3
Using honeybadger 4.8.0
Using kaminari-core 1.2.1
Using rb-fsevent 0.10.4
Using ruby_dep 1.5.0
Using ruby2_keywords 0.0.4
Fetching mysql2 0.5.3
Using minitest 5.14.4
Using zeitwerk 2.4.2
Using parslet 1.8.2
Using puma 3.12.6
Using rails_http_options 0.1.0
Using redis 4.2.5
Using rubyzip 2.3.0
Using semantic_range 3.0.0
Using rspec-support 3.10.2
Using simple-random 1.0.3
Using simplecov-html 0.12.3
Using simplecov_json_formatter 0.1.2
Using spring 2.1.1
Using sqlite3 1.4.2
Using stripe 5.32.1
Using vcr 6.0.0
Using i18n 1.8.10
Using tzinfo 2.0.4
Using rack-test 1.1.0
Using sprockets 3.7.2
Using warden 1.2.9
Using rack-attack 6.5.0
Using rack-cors 1.1.1
Using rack-protection 2.1.0
Using rack-proxy 0.6.5
Using sitemap_generator 6.1.2
Using addressable 2.7.0
Using autoprefixer-rails 10.2.4.0
Using aws-sigv4 1.2.3
Using bootsnap 1.7.4
Using sassc 2.4.0
Using crack 0.4.5
Using unf 0.1.4
Using haml 5.2.1
Using ruby_parser 3.15.1
Using rb-inotify 0.10.1
Using mustermann 1.1.1
Using thwait 0.2.0
Using sidekiq 6.2.1
Using websocket-extensions 0.1.5
Using activesupport 6.1.3.2
Using aws-sdk-core 3.114.0
Using simpleidn 0.2.1
Using et-orbi 1.2.4
Using faker 2.17.0
Using sass-listen 4.0.0
Using launchy 2.5.0
Using listen 3.1.5
Using rspec-core 3.10.1
Using rspec-expectations 3.10.1
Using rspec-mocks 3.10.2
Using selenium-webdriver 3.142.7
Using simplecov 0.21.2
Using sinatra 2.1.0
Using webmock 3.12.2
Using erubi 1.10.0
Using mini_mime 1.0.3
Using racc 1.5.2
Using ruby_http_client 3.5.2
Using nokogiri 1.11.3
Using websocket-driver 0.7.3
Using globalid 0.4.2
Using activemodel 6.1.3.2
Using mail 2.7.1
Using aws-sdk-kms 1.43.0
Using dnsruby 1.61.5
Using factory_bot 6.1.0
Using fugit 1.4.5
Using sass 3.7.4
Using jbuilder 2.11.2
Using rspec 3.10.0
Using sendgrid-ruby 6.4.0
Using shoulda-matchers 4.5.1
Using simplecov-rcov 0.2.3
Using split 3.4.1
Using spring-watcher-listen 2.0.1
Using rails-dom-testing 2.0.3
Using loofah 2.9.1
Using activejob 6.1.3.2
Using activerecord 6.1.3.2
Using aws-sdk-s3 1.93.1
Using xpath 3.2.0
Using html2haml 2.2.0
Using roo 2.8.3
Using rspec-wait 0.0.9
Using rufus-scheduler 3.7.0
Using webdrivers 4.6.0
Using rails-html-sanitizer 1.3.0
Using sidekiq-scheduler 3.0.1
Using capybara 3.35.3
Using counter_culture 2.8.0
Using actionview 6.1.3.2
Using kaminari-activerecord 1.2.1
Using actionpack 6.1.3.2
Using kaminari-actionview 1.2.1
Using nonschema_migrations 5.0.2
Using actionmailer 6.1.3.2
Using railties 6.1.3.2
Using sprockets-rails 3.2.2
Using kaminari 1.2.1
Using activestorage 6.1.3.2
Using activerecord-session_store 2.0.0
Using font_awesome5_rails 1.4.0
Using actioncable 6.1.3.2
Using haml-rails 2.0.1
Using sass-rails 5.1.0
Using jquery-rails 4.4.0
Using rspec-rails 5.0.1
Using web-console 4.1.0
Using webpacker 5.2.1
Using actionmailbox 6.1.3.2
Using actiontext 6.1.3.2
Using sassc-rails 2.1.2
Using responders 3.0.1
Using bootstrap 4.4.1
Using rails 6.1.3.2
Using factory_bot_rails 6.1.0
Using devise 4.7.3
Using turbo-rails 0.5.9 from https://github.com/hotwired/turbo-rails.git (at main@2945dcb)
Using stimulus-rails 0.2.3
Using stripe-rails 2.3.0
Using universal-track-manager 0.6.1.alpha
Using paranoia 2.4.3
Using spf-query 0.1.5 from https://github.com/trailofbits/spf-query.git (at master@6dac502)
Installing mysql2 0.5.3 with native extensions
Using hot-glue 0.1.1
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /Users/jason/.rvm/gems/ruby-2.6.6/gems/mysql2-0.5.3/ext/mysql2
/Users/jason/.rvm/rubies/ruby-2.6.6/bin/ruby -I /Users/jason/.rvm/rubies/ruby-2.6.6/lib/ruby/site_ruby/2.6.0 -r
./siteconf20210604-8580-1kmtwzs.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 /opt/homebrew/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... no
-----
Don't know how to set rpath on your system, if MySQL libraries are not in path mysql2 may not load
-----
-----
Setting libpath to /opt/homebrew/Cellar/mysql/8.0.25_1/lib
-----
creating Makefile
current directory: /Users/jason/.rvm/gems/ruby-2.6.6/gems/mysql2-0.5.3/ext/mysql2
make "DESTDIR=" clean
current directory: /Users/jason/.rvm/gems/ruby-2.6.6/gems/mysql2-0.5.3/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 -lzstd
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [mysql2.bundle] Error 1
make failed, exit code 2
Gem files will remain installed in /Users/jason/.rvm/gems/ruby-2.6.6/gems/mysql2-0.5.3 for inspection.
Results logged to /Users/jason/.rvm/gems/ruby-2.6.6/extensions/-darwin-20/2.6.0/mysql2-0.5.3/gem_make.out
An error occurred while installing mysql2 (0.5.3), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.5.3' --source 'https://rubygems.org/'` succeeds before bundling.
In Gemfile:
mysql2
jason@MacBook-Air %
我已经成功了 运行 brew install mysql ...如果我再次 运行 它告诉我：
警告：mysql8.0.25_1 已经安装并且是最新的。
要重新安装 8.0.25_1、运行：
brew 重新安装 mysql
尝试在 M1
上安装 mysql2 -v 0.4.1 时遇到同样的错误
--已解决--
brew install zstd
which zstd
我的路径是 -> /opt/homebrew/bin/zstd
你需要检查 zstd 从哪里链接
cd /opt/homebrew/bin
ls -la
zstd -> ../Cellar/zstd/1.5.0/bin/zstd
所以你需要获取 zstd 库的路径，我的是：
/opt/homebrew/Cellar/zstd/1.5.0/lib
然后用一些魔法做经典组合
bundle config --local build.mysql2 "--with-ldflags=-L/opt/homebrew/Cellar/zstd/1.5.0/lib"
bundle install
gem list my
*** LOCAL GEMS ***
mysql2 (0.4.10)
这就是我在 M1 上的工作方式。
首先确保您已安装 mysql 并使用 Homebrew 开启 openssl
brew install mysql
brew install openssl
然后为安装 mysql2 手动设置这些值。我的 zstd 路径与 Octocats 相同，因此请务必遵循他们的说明并适当更改 --with-ldflags 选项。
bundle config --local build.mysql2 "--with-opt-dir="$(brew --prefix openssl) --with-ldflags=-L/opt/homebrew/Cellar/zstd/1.5.0/lib""
步骤 1:
确认您通过 brew
安装了 openssl 和 MySQL
brew install mysql
brew install openssl
或者如果你有以前版本的 openssl 试试
brew reinstall openssl@3
步骤 2:
运行 在您的 Rails 应用程序上执行此操作以确保您可以通过捆绑程序：
gem install mysql2 -v '0.5.3' -- --with-opt-dir=$(brew --prefix openssl) --with-ldflags=-L/opt/homebrew/opt/zstd/lib
注意两点：$(brew --prefix openssl)动态替换掉evaluation里面的东西$(...)到你机器上的openssl目录下。
/opt/homebrew/opt/zstd 实际上是指向您机器上当前版本的 zstd 的 符号链接（它链接到 /opt/homebrew/opt/Cellar/zstd/1.5.2 之类的东西）
步骤 3:
如果你想全局使用这个，运行 这个：
bundle config --global build.mysql2 "--with-opt-dir=$(brew --prefix openssl) --with-ldflags=-L/opt/homebrew/opt/zstd/lib"
请注意，这将更改您的 ~/.bundler/config 文件，然后全局应用于捆绑器
我在 M1 芯片上使用 MacOS 11.6 (Big Sur) 时发生了这种情况。
尝试
brew install mysql
然后
gem install mysql2 -- --with-opt-dir="$(brew --prefix zstd)"
这对我有用。
如果可行，则使用它来配置 Bundler 为您完成（在此目录中，即“本地”）：
bundle config --local build.mysql2 "--with-opt-dir="$(brew --prefix zstd)""
那么 bundle install 应该可以。
while 运行ning bundle install
An error occurred while installing mysql2 (0.5.3), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.5.3' --source 'https://rubygems.org/'` succeeds before bundling.
Rails 应用 6.1.3
捆绑器版本 2.2.19
macOS Big Sur 11.4
苹果M1
在 Gemfile 中
ruby '2.6.6'
gem 'rails', '~> 6.1.3', '>= 6.1.3.1'
gem 'mysql2'
在 Gemfile.lock mysql 是在 0.5.3
当我 运行 bundle install 它正常崩溃：
检查输出中较早出现的构建错误，构建错误似乎是：（下面的完整结果）
ld: library not found for -lzstd
bundle install 的完整结果是
jason@MacBook-Air % bundle install
Fetching gem metadata from https://rubygems.org/
Fetching gem metadata from https://rubygems.org/........
Using rake 13.0.3
Using concurrent-ruby 1.1.8
Using rack 2.2.3
Using nio4r 2.5.7
Using builder 3.2.4
Using marcel 1.0.1
Using mini_portile2 2.5.1
Using multi_json 1.15.0
Using method_source 1.0.0
Using crass 1.0.6
Using thor 1.1.0
Using public_suffix 4.0.6
Using execjs 2.7.0
Using aws-eventstream 1.1.1
Using aws-partitions 1.447.0
Using jmespath 1.4.0
Using bcrypt 3.1.16
Using betterlorem 0.1.2
Using bindex 0.8.1
Using msgpack 1.4.2
Using popper_js 1.16.0
Using ffi 1.15.0
Using tilt 2.0.10
Using bundler 2.2.19
Using byebug 11.1.3
Using regexp_parser 2.1.1
Using childprocess 3.0.0
Using connection_pool 2.2.5
Using rexml 3.2.5
Using orm_adapter 0.5.0
Using diff-lcs 1.4.4
Using unf_ext 0.0.7.7
Using docile 1.3.5
Using e2mmap 0.1.0
Using erubis 2.7.0
Using ffaker 2.18.0
Using finishing_moves 1.0.1
Using raabro 1.4.0
Using temple 0.8.2
Using sexp_processor 4.15.2
Using hashdiff 1.0.1
Using hiredis 0.6.3
Using honeybadger 4.8.0
Using kaminari-core 1.2.1
Using rb-fsevent 0.10.4
Using ruby_dep 1.5.0
Using ruby2_keywords 0.0.4
Fetching mysql2 0.5.3
Using minitest 5.14.4
Using zeitwerk 2.4.2
Using parslet 1.8.2
Using puma 3.12.6
Using rails_http_options 0.1.0
Using redis 4.2.5
Using rubyzip 2.3.0
Using semantic_range 3.0.0
Using rspec-support 3.10.2
Using simple-random 1.0.3
Using simplecov-html 0.12.3
Using simplecov_json_formatter 0.1.2
Using spring 2.1.1
Using sqlite3 1.4.2
Using stripe 5.32.1
Using vcr 6.0.0
Using i18n 1.8.10
Using tzinfo 2.0.4
Using rack-test 1.1.0
Using sprockets 3.7.2
Using warden 1.2.9
Using rack-attack 6.5.0
Using rack-cors 1.1.1
Using rack-protection 2.1.0
Using rack-proxy 0.6.5
Using sitemap_generator 6.1.2
Using addressable 2.7.0
Using autoprefixer-rails 10.2.4.0
Using aws-sigv4 1.2.3
Using bootsnap 1.7.4
Using sassc 2.4.0
Using crack 0.4.5
Using unf 0.1.4
Using haml 5.2.1
Using ruby_parser 3.15.1
Using rb-inotify 0.10.1
Using mustermann 1.1.1
Using thwait 0.2.0
Using sidekiq 6.2.1
Using websocket-extensions 0.1.5
Using activesupport 6.1.3.2
Using aws-sdk-core 3.114.0
Using simpleidn 0.2.1
Using et-orbi 1.2.4
Using faker 2.17.0
Using sass-listen 4.0.0
Using launchy 2.5.0
Using listen 3.1.5
Using rspec-core 3.10.1
Using rspec-expectations 3.10.1
Using rspec-mocks 3.10.2
Using selenium-webdriver 3.142.7
Using simplecov 0.21.2
Using sinatra 2.1.0
Using webmock 3.12.2
Using erubi 1.10.0
Using mini_mime 1.0.3
Using racc 1.5.2
Using ruby_http_client 3.5.2
Using nokogiri 1.11.3
Using websocket-driver 0.7.3
Using globalid 0.4.2
Using activemodel 6.1.3.2
Using mail 2.7.1
Using aws-sdk-kms 1.43.0
Using dnsruby 1.61.5
Using factory_bot 6.1.0
Using fugit 1.4.5
Using sass 3.7.4
Using jbuilder 2.11.2
Using rspec 3.10.0
Using sendgrid-ruby 6.4.0
Using shoulda-matchers 4.5.1
Using simplecov-rcov 0.2.3
Using split 3.4.1
Using spring-watcher-listen 2.0.1
Using rails-dom-testing 2.0.3
Using loofah 2.9.1
Using activejob 6.1.3.2
Using activerecord 6.1.3.2
Using aws-sdk-s3 1.93.1
Using xpath 3.2.0
Using html2haml 2.2.0
Using roo 2.8.3
Using rspec-wait 0.0.9
Using rufus-scheduler 3.7.0
Using webdrivers 4.6.0
Using rails-html-sanitizer 1.3.0
Using sidekiq-scheduler 3.0.1
Using capybara 3.35.3
Using counter_culture 2.8.0
Using actionview 6.1.3.2
Using kaminari-activerecord 1.2.1
Using actionpack 6.1.3.2
Using kaminari-actionview 1.2.1
Using nonschema_migrations 5.0.2
Using actionmailer 6.1.3.2
Using railties 6.1.3.2
Using sprockets-rails 3.2.2
Using kaminari 1.2.1
Using activestorage 6.1.3.2
Using activerecord-session_store 2.0.0
Using font_awesome5_rails 1.4.0
Using actioncable 6.1.3.2
Using haml-rails 2.0.1
Using sass-rails 5.1.0
Using jquery-rails 4.4.0
Using rspec-rails 5.0.1
Using web-console 4.1.0
Using webpacker 5.2.1
Using actionmailbox 6.1.3.2
Using actiontext 6.1.3.2
Using sassc-rails 2.1.2
Using responders 3.0.1
Using bootstrap 4.4.1
Using rails 6.1.3.2
Using factory_bot_rails 6.1.0
Using devise 4.7.3
Using turbo-rails 0.5.9 from https://github.com/hotwired/turbo-rails.git (at main@2945dcb)
Using stimulus-rails 0.2.3
Using stripe-rails 2.3.0
Using universal-track-manager 0.6.1.alpha
Using paranoia 2.4.3
Using spf-query 0.1.5 from https://github.com/trailofbits/spf-query.git (at master@6dac502)
Installing mysql2 0.5.3 with native extensions
Using hot-glue 0.1.1
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /Users/jason/.rvm/gems/ruby-2.6.6/gems/mysql2-0.5.3/ext/mysql2
/Users/jason/.rvm/rubies/ruby-2.6.6/bin/ruby -I /Users/jason/.rvm/rubies/ruby-2.6.6/lib/ruby/site_ruby/2.6.0 -r
./siteconf20210604-8580-1kmtwzs.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 /opt/homebrew/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... no
-----
Don't know how to set rpath on your system, if MySQL libraries are not in path mysql2 may not load
-----
-----
Setting libpath to /opt/homebrew/Cellar/mysql/8.0.25_1/lib
-----
creating Makefile
current directory: /Users/jason/.rvm/gems/ruby-2.6.6/gems/mysql2-0.5.3/ext/mysql2
make "DESTDIR=" clean
current directory: /Users/jason/.rvm/gems/ruby-2.6.6/gems/mysql2-0.5.3/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 -lzstd
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [mysql2.bundle] Error 1
make failed, exit code 2
Gem files will remain installed in /Users/jason/.rvm/gems/ruby-2.6.6/gems/mysql2-0.5.3 for inspection.
Results logged to /Users/jason/.rvm/gems/ruby-2.6.6/extensions/-darwin-20/2.6.0/mysql2-0.5.3/gem_make.out
An error occurred while installing mysql2 (0.5.3), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.5.3' --source 'https://rubygems.org/'` succeeds before bundling.
In Gemfile:
mysql2
jason@MacBook-Air %
我已经成功了 运行 brew install mysql ...如果我再次 运行 它告诉我：
警告：mysql8.0.25_1 已经安装并且是最新的。 要重新安装 8.0.25_1、运行： brew 重新安装 mysql
尝试在 M1
上安装 mysql2 -v 0.4.1 时遇到同样的错误
--已解决--
brew install zstd
which zstd
我的路径是 -> /opt/homebrew/bin/zstd
你需要检查 zstd 从哪里链接
cd /opt/homebrew/bin
ls -la
zstd -> ../Cellar/zstd/1.5.0/bin/zstd
所以你需要获取 zstd 库的路径，我的是：
/opt/homebrew/Cellar/zstd/1.5.0/lib
然后用一些魔法做经典组合
bundle config --local build.mysql2 "--with-ldflags=-L/opt/homebrew/Cellar/zstd/1.5.0/lib"
bundle install
gem list my
*** LOCAL GEMS ***
mysql2 (0.4.10)
这就是我在 M1 上的工作方式。
首先确保您已安装 mysql 并使用 Homebrew 开启 openssl
brew install mysql
brew install openssl
然后为安装 mysql2 手动设置这些值。我的 zstd 路径与 Octocats 相同，因此请务必遵循他们的说明并适当更改 --with-ldflags 选项。
bundle config --local build.mysql2 "--with-opt-dir="$(brew --prefix openssl) --with-ldflags=-L/opt/homebrew/Cellar/zstd/1.5.0/lib""
步骤 1:
确认您通过 brew
安装了 openssl 和 MySQLbrew install mysql
brew install openssl
或者如果你有以前版本的 openssl 试试
brew reinstall openssl@3
步骤 2:
运行 在您的 Rails 应用程序上执行此操作以确保您可以通过捆绑程序：
gem install mysql2 -v '0.5.3' -- --with-opt-dir=$(brew --prefix openssl) --with-ldflags=-L/opt/homebrew/opt/zstd/lib
注意两点：$(brew --prefix openssl)动态替换掉evaluation里面的东西$(...)到你机器上的openssl目录下。
/opt/homebrew/opt/zstd 实际上是指向您机器上当前版本的 zstd 的 符号链接（它链接到 /opt/homebrew/opt/Cellar/zstd/1.5.2 之类的东西）
步骤 3:
如果你想全局使用这个，运行 这个：
bundle config --global build.mysql2 "--with-opt-dir=$(brew --prefix openssl) --with-ldflags=-L/opt/homebrew/opt/zstd/lib"
请注意，这将更改您的 ~/.bundler/config 文件，然后全局应用于捆绑器
我在 M1 芯片上使用 MacOS 11.6 (Big Sur) 时发生了这种情况。
尝试
brew install mysql
然后
gem install mysql2 -- --with-opt-dir="$(brew --prefix zstd)"
这对我有用。
如果可行，则使用它来配置 Bundler 为您完成（在此目录中，即“本地”）：
bundle config --local build.mysql2 "--with-opt-dir="$(brew --prefix zstd)""
那么 bundle install 应该可以。