尽管使用 `gem install...` 命令进行安装，mysql2 gem 在捆绑安装时失败

Question

这是我的bundle install日志

Fetching mysql2 0.5.2
Installing mysql2 0.5.2 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
...
...
...
Cannot find mysql_config at /usr/local/opt/mysql@5.6/bin/mysql_config
--with-ldflags=-L/usr/local/opt/openssl/lib
--with-cppflags=-I/usr/local/opt/openssl/include
-----
*** 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:
    --with-opt-dir
    --without-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
    --srcdir=.
    --curdir
    --ruby=/Users/admin/.asdf/installs/ruby/2.6.3/bin/$(RUBY_BASE_NAME)
    --with-mysql-dir
    --without-mysql-dir
    --with-mysql-include
    --without-mysql-include=${mysql-dir}/include
    --with-mysql-lib
    --without-mysql-lib=${mysql-dir}/lib
    --with-mysql-config

To see why this extension failed to compile, please check the mkmf.log which can be found
here:

/Users/admin/development/locari/vendor/bundle/ruby/2.6.0/extensions/x86_64-darwin-18/2.6.0-static/mysql2-0.5.2/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in
/Users/admin/development/locari/vendor/bundle/ruby/2.6.0/gems/mysql2-0.5.2 for
inspection.
Results logged to
/Users/admin/development/locari/vendor/bundle/ruby/2.6.0/extensions/x86_64-darwin-18/2.6.0-static/mysql2-0.5.2/gem_make.out

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.

所以我按照它说的做，然后运行sudo gem install mysql2 -v '0.5.2' --source

$ sudo gem install mysql2 -v '0.5.2' --source 'https://rubygems.org/'
Building native extensions. This could take a while...
Successfully installed mysql2-0.5.2
Parsing documentation for mysql2-0.5.2
Done installing documentation for mysql2 after 0 seconds
1 gem installed

它安装得很好！ 但是当我再次运行bundle install时，我得到了同样的错误。 我试过在 brew 中卸载、取消链接和重新安装mysql 。

我接下来可以尝试什么？？

Answer 1

首先运行这些命令：

bundle config --local build.mysql2 "--with-cppflags=-I/usr/local/opt/openssl/include --with-ldflags=-L/usr/local/opt/openssl/lib"

然后运行bundle install就可以了。

Answer 2

在 M1 mac 上安装

这种方法在ruby v2.7.2和macOS Big Sur 11.4上帮助了我。

安装依赖

brew install mysql zstd openssl

安装宝石

gem install mysql2 -- --with-ldflags="-L $(brew --cellar zstd)/1.5.0/lib -L $(brew --prefix openssl)/lib" --with-ldlibs="-lzstd -lssl" --with-cppflags="-I $(brew --prefix openssl)/include"

作为替代方案，您可以修改 bundler 配置：

bundle config --local build.mysql2 --with-ldflags="-L $(brew --cellar zstd)/1.5.0/lib -L $(brew --prefix openssl)/lib" --with-ldlibs="-lzstd -lssl" --with-cppflags="-I $(brew --prefix openssl)/include"

并运行bundle install 。

Answer 3

将构建选项与bundler 。

尝试在您的应用程序目录中运行它：

bundle config --local build.mysql2 "--with-ldflags=-L/usr/local/opt/openssl/lib --with-cppflags=-I/usr/local/opt/openssl/include"

这只是为您的应用程序设置它，如果其他人需要类似的配置，这可以方便地检查您的存储库。 但是您也可以通过将--local替换为--local来--global成为计算机上的全局配置，它将应用于您用户帐户上的所有bundle install命令。

更新

这实际上并没有最终对我有用，但我会把它留在这里，因为它应该有效。 我基本上只需要运行：

gem install mysql2 -v '0.5.3' -- --with-ldflags=-L/usr/local/opt/openssl/lib --with-cppflags=-I/usr/local/opt/openssl/include

而不是使用捆绑器，即使设置这个构建配置应该已经完成​​了。