最近手伝っていたプロジェクトでローカルPCにMySQLを入れなきゃいけないことがあったんですが、bundle install時にエラーが起こり解決にけっこう時間を取られたので、メモとして残しておきます。
バージョン
- ruby 2.5.3
- Rails 5.2.3
- MySQL 5.7
エラー内容
gemfileにgem 'mysql2', '>= 0.4.4', '< 0.6.0'と記述がある状態でbundle installを行ったときに下記のようなエラーが発生しました。
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@5.7/lib
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creating Makefile
current directory:
/Users/gunji/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2-0.5.3/ext/mysql2
make "DESTDIR=" clean
current directory:
/Users/gunji/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/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 -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/gunji/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2-0.5.3 for
inspection.
Results logged to
/Users/gunji/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/extensions/x86_64-darwin-19/2.5.0/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
エラーログにあるようにgem install mysql2 -v '0.5.3' --source 'https://rubygems.org/'を試してもやはり通らず。
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
current directory: /Users/gunji/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2-0.5.3/ext/mysql2
/Users/gunji/.rbenv/versions/2.5.3/bin/ruby -r ./siteconf20200229-60710-12bhnvq.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@5.7/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... 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@5.7/lib
-----
creating Makefile
current directory: /Users/gunji/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2-0.5.3/ext/mysql2
make "DESTDIR=" clean
current directory: /Users/gunji/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/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 -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
どうやらSSL周りでエラーが発生しているようで、ぐぐっていたらStackOverflowに以下のような内容がありました。
Apple has deprecated use of OpenSSL in favor of its own TLS and crypto libraries
Generally there are no consequences of this for you. If you build your own > software and it requires this formula, you'll need to add to your build variables:
LDFLAGS: -L/usr/local/opt/openssl/lib
CPPFLAGS: -I/usr/local/opt/openssl/include
PKG_CONFIG_PATH: /usr/local/opt/openssl/lib/pkgconfig
解決策
記事を参考にしつつ、最終的には以下のようにすることで解決できました。brewでopenssl@1.1が入っている前提です。
$ bundle config --local build.mysql2 "--with-ldflags=-L/usr/local/opt/openssl@1.1/lib"
上記のように設定をすると、.bundle/config に設定値が書かれます。
---
BUNDLE_BUILD__MYSQL2: "--with-ldflags=-L/usr/local/opt/openssl@1.1/lib"
これでbundle installが無事に通るようになりました。
まとめ
ローカル環境に色々インストールして開発してると変なハマりがよくあります。
プロジェクトにDockerが導入されていたら起こらなかったエラーかもしれません。