使用原生扩展安装 mysql2 0.4.10 Gem::Ext::BuildError: ERROR: Failed to build gem native extension

Question

I have installed rbenv to use ruby 2.2.4 version我已经安装了 rbenv 来使用 ruby 2.2.4 版本

when I run the command bundle install当我运行命令bundle install

I get this我明白了

Why it is为什么会这样

 current directory: /Library/Ruby/Gems/2.6.0/gems/mysql2-0.4.10/ext/mysql2

as, I am using ruby 2.2.4因为，我正在使用 ruby 2.2.4

is this the reason to failed to build gem native extensions?这是未能构建 gem 原生扩展的原因吗？
if, how I can fix this path?.如果，我该如何修复这条路径？

Answer 1

I came across this error while running bundle for mysql2 (0.5.2)我在为 mysql2 (0.5.2) 运行 bundle 时遇到了这个错误

Running these commands worked for me.运行这些命令对我有用。

brew install openssl

bundle config --global build.mysql2 --with-opt-dir="$(brew --prefix openssl)"

bundle

Answer 2

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

without the cppflags part solve the problem.没有cppflags部分解决问题。