ld：安装mysql2 gem时找不到-lssl的库

Posted 2023-02-19

【中文标题】ld：安装mysql2 gem时找不到-lssl的库

【英文标题】：ld: library not found for -lssl while installing mysql2 gem

【发布时间】：2019-11-24 14:09:01

【问题描述】：

我将项目 Gemfile 中的 mysql2 版本从 0.3.20 更改为 0.5.2。当我运行bundle update mysql2 时，出现以下错误：

Fetching mysql2 0.5.2 (was 0.3.21)
Installing mysql2 0.5.2 (was 0.3.21) with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /Users/hirurg103/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/mysql2-0.5.2/ext/mysql2
/Users/hirurg103/.rbenv/versions/2.4.1/bin/ruby -I /Users/hirurg103/.rbenv/versions/2.4.1/lib/ruby/site_ruby/2.4.0 -r ./siteconf20190715-35076-13r30uh.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@5.6/bin/mysql_config
-----
checking for mysql.h... yes
checking for errmsg.h... yes
checking for SSL_MODE_DISABLED in mysql.h... no
checking for MYSQL_OPT_SSL_ENFORCE in mysql.h... no
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@5.6/lib
-----
creating Makefile

current directory: /Users/hirurg103/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/mysql2-0.5.2/ext/mysql2
make "DESTDIR=" clean

current directory: /Users/hirurg103/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/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

Gem files will remain installed in /Users/hirurg103/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/mysql2-0.5.2 for inspection.
Results logged to /Users/hirurg103/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/extensions/x86_64-darwin-18/2.4.0-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.

我的设置：

mysql：版本 14.14 Distrib 5.6.42，适用于 osx10.14 (x86_64)，使用 EditLine 包装器

操作系统：MacOS Mojave 10.14.2

我该如何解决这个错误？

【参考方案1】：

我可以通过以下命令解决这个问题：

gem install mysql2 -v '0.5.2' -- --with-cflags=\"-I/usr/local/opt/openssl/include\" --with-ldflags=\"-L/usr/local/opt/openssl/lib\"

然后

bundle install

更新：

OpenSSL 1.0 reached EOL on 2019-12-31。 Mac OS 和 Homebrew 软件包升级后，您需要指定 openssl@1.1 的路径：

gem install mysql2 -v 0.5.2 -- --with-cflags=\"-I/usr/local/opt/openssl@1.1/include\" --with-ldflags=\"-L/usr/local/opt/openssl@1.1/lib\"

【讨论】：

我在启动 rails 服务器时遇到了问题，我遇到了一个错误，提示 dependent dylib 'libssl.1.1.dylib' not found。您使用这些标志重新安装 mysql2 的解决方案有效。谢谢！

更新建议使用0.4.4；该指令有效，但您也可以将 0.5.2 与 openssl@1.1 标志一起使用。也许 UPDATE 需要调整以反映这一点（而不是将 gem 降级到 0.4.4）。

这适用于gem install，但就我而言，它在bundle install 中仍然失败。我猜这与将 gem 捆绑到供应商目录中有关，所以我正在寻找一种在 bundle 中设置这些参数的方法。

而答案是bundle config --local build.mysql2 --with-ldflags=-L/usr/local/opt/openssl/lib，通过阅读***.com/a/56787988/776723和gist.github.com/fernandoaleman/…找到

【参考方案2】：

我已修复它安装缺少的软件包 libssl-dev（在 Debian 衍生产品上）。

【参考方案3】：

在 macOS Big Sur 上，我使用以下命令安装了 mysql2 gem：

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