mysql2 bundle install時のエラー

Question

RailsでWebサービスを作成していたんですがbundle installをしたらmysql２でエラーがでました。

下記エラー文です。

やったこと
・gem install mysql2 -v '0.5.3' --source 'https://rubygems.org/'
・/usr/local/opt/mysql@5.7/libへパスを通す

わかる方がいればご教示いただければ幸いです。

Fetching mysql2 0.5.3
Installing mysql2 0.5.3 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /Users/ユーザ名/Desktop/PF2/recogour/vendor/bundle/ruby/2.7.0/gems/mysql2-0.5.3/ext/mysql2
/Users/ユーザ名/.rbenv/versions/2.7.0/bin/ruby -I /Users/ユーザ名/.rbenv/versions/2.7.0/lib/ruby/2.7.0 -r
./siteconf20200719-13940-1j9sgjx.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/ユーザ名/Desktop/PF2/recogour/vendor/bundle/ruby/2.7.0/gems/mysql2-0.5.3/ext/mysql2
make "DESTDIR=" clean

current directory: /Users/ユーザ名/Desktop/PF2/recogour/vendor/bundle/ruby/2.7.0/gems/mysql2-0.5.3/ext/mysql2
make "DESTDIR="
compiling client.c
client.c:787:14: warning: incompatible pointer types passing 'VALUE (void *)' (aka 'unsigned long (void *)') to
parameter of type 'VALUE (*)(VALUE)' (aka 'unsigned long (*)(unsigned long)') [-Wincompatible-pointer-types]
  rb_rescue2(do_send_query, (VALUE)&args, disconnect_and_raise, self, rb_eException, (VALUE)0);
             ^~~~~~~~~~~~~
/Users/ユーザ名/.rbenv/versions/2.7.0/include/ruby-2.7.0/ruby/ruby.h:1988:25: note: passing argument to parameter
here
VALUE rb_rescue2(VALUE(*)(VALUE),VALUE,VALUE(*)(VALUE,VALUE),VALUE,...);
                        ^
client.c:795:16: warning: incompatible pointer types passing 'VALUE (void *)' (aka 'unsigned long (void *)') to
parameter of type 'VALUE (*)(VALUE)' (aka 'unsigned long (*)(unsigned long)') [-Wincompatible-pointer-types]
    rb_rescue2(do_query, (VALUE)&async_args, disconnect_and_raise, self, rb_eException, (VALUE)0);
               ^~~~~~~~
/Users/ユーザ名/.rbenv/versions/2.7.0/include/ruby-2.7.0/ruby/ruby.h:1988:25: note: passing argument to parameter
here
VALUE rb_rescue2(VALUE(*)(VALUE),VALUE,VALUE(*)(VALUE,VALUE),VALUE,...);
                        ^
2 warnings generated.
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/ユーザ名/Desktop/PF2/recogour/vendor/bundle/ruby/2.7.0/gems/mysql2-0.5.3
for inspection.
Results logged to
/Users/ユーザ名/Desktop/PF2/recogour/vendor/bundle/ruby/2.7.0/extensions/x86_64-darwin-19/2.7.0/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

Answer 1

Mac で作業されていますか？

Mac の場合は openssl をインストールすると
mysql2 がインストールできるようになるという報告があります:

brew install openssl

これでまだインストールできない場合は、環境変数を設定するようです:

export LIBRARY_PATH=$LIBRARY_PATH:/usr/local/opt/openssl/lib/

ld: library not found for -lssl after Mac OS Sierra upgrade · Issue #795 · brianmario/mysql2

こういう報告もありますね:
mysql2 のインストール時にld: library not found for -lssl が発生した場合の対処 Mac版 - Qiita

Comments

[takuya861]

回答ありがとうございます！

ご教示いただいた内容を試したら、bundle installはできました！
ですがrails sでエラーがでてしまいました。

そちらは別の内容となるので、もう少し調べてみます！

ありがとうございました！