英文:
Ruby gem install fails because it can't find openssl installed by Homebrew
问题
尝试安装依赖openssl的Ruby gem时，出现以下错误之一：
```text
fatal error: 'openssl/sha.h' 文件未找到
#include <openssl/sha.h>
如果我已经通过Homebrew安装了openssl，路径分别为 /opt/homebrew/Cellar/openssl@1.1 和 /opt/homebrew/Cellar/openssl@3，应该如何正确安装它呢？
<details>
<summary>英文:</summary>
When I try to install a Ruby gem that depends on openssl, I'm getting (among other log lines):
```text
fatal error: 'openssl/sha.h' file not found
#include <openssl/sha.h>
What is the right way to install it, if I have openssl installed via Homebrew at /opt/homebrew/Cellar/openssl@1.1 and at /opt/homebrew/Cellar/openssl@3.
答案1
得分: 1
这是它的工作方式：
$ gem install eventmachine -- --with-openssl-dir=/opt/homebrew/Cellar/openssl@1.1/1.1.1u/
目录/opt/homebrew/Cellar/openssl@1.1/1.1.1u/是Homebrew安装OpenSSL 1.1的位置。也适用于/opt/homebrew/Cellar/openssl@3/3.1.0/。
一个标准的方法，据我了解，如下：
$ rvm pkg install openssl
$ rvm reinstall ruby-3.2.1 --with-openssl-dir=$HOME/.rvm/usr
$ gem install eventmachine
如果希望让Ruby使用Homebrew安装的openssl：
$ brew install openssl@1.1
$ rvm reinstall ruby-3.2.1 --with-openssl-dir=/opt/homebrew/Cellar/openssl@1.1/1.1.1u
$ gem install eventmachine
我不得不将这个放入~/.profile（在运行rvm reinstall之前！）：
export CPPFLAGS="{$CPPFLAGS} -I/opt/homebrew/Cellar/openssl@1.1/1.1.1u/include"
英文:
This is how it worked:
$ gem install eventmachine -- --with-openssl-dir=/opt/homebrew/Cellar/openssl\@1.1/1.1.1u/
The directory /opt/homebrew/Cellar/openssl@1.1/1.1.1u/ is where Homebrew installed OpenSSL 1.1. Also works with /opt/homebrew/Cellar/openssl@3/3.1.0/.
A canonical method, as I understand, is the following:
$ rvm pkg install openssl
$ rvm reinstall ruby-3.2.1 --with-openssl-dir=$HOME/.rvm/usr
$ gem install eventmachine
If it's desired to make Ruby use openssl installed by Homebrew:
$ brew install openssl@1.1
$ rvm reinstall ruby-3.2.1 --with-openssl-dir=/opt/homebrew/Cellar/openssl\@1.1/1.1.1u
$ gem install eventmachine
I had to put this into ~/.profile (before running rvm reinstall!):
export CPPFLAGS="${CPPFLAGS} -I/opt/homebrew/Cellar/openssl@1.1/1.1.1u/include"
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