bundleインストールでmysqlが通らない現象

以下の環境で開発をしておりました。

rails5
ruby5
mysql

rbenvのgemsetを新しく作り直したらbundleが通らなくなってしまいました。
原因としてはmysql2が通らないとのこと。

発生してるエラー

$ bundle
etching mysql2 0.4.10
Installing mysql2 0.4.10 with native extensions
Errno::EACCES: Permission denied @ rb_sysopen - /Users/user_name/app_name/vendor/bundle/ruby/2.5.0/gems/mysql2-0.4.10/CHANGELOG.md
An error occurred while installing mysql2 (0.4.10), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.4.10' --source 'https://rubygems.org/'` succeeds before bundling.

In Gemfile:
  mysql2

↓

gem install mysql2 -v '0.4.10' --source 'https://rubygems.org/'
Building native extensions. This could take a while...
ERROR:  Error installing mysql2:
	ERROR: Failed to build gem native extension.

    current directory: /Users/user_name/.rbenv/versions/2.5.0/gemsets/2.5.0/gems/mysql2-0.4.10/ext/mysql2
/Users/user_name/.rbenv/versions/2.5.0/bin/ruby -r ./siteconf20181127-32843-1vyjcho.rb extconf.rb
checking for rb_absint_size()... yes
checking for rb_absint_singlebit_p()... yes
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for rb_thread_blocking_region()... no
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
checking for rb_big_cmp()... yes
-----
Using mysql_config at /usr/local/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
-----
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/Cellar/mysql/8.0.12/lib
-----
creating Makefile

current directory: /Users/user_name/.rbenv/versions/2.5.0/gemsets/2.5.0/gems/mysql2-0.4.10/ext/mysql2
make "DESTDIR=" clean

current directory: /Users/user_name/.rbenv/versions/2.5.0/gemsets/2.5.0/gems/mysql2-0.4.10/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/user_name/.rbenv/versions/2.5.0/gemsets/2.5.0/gems/mysql2-0.4.10 for inspection.
Results logged to /Users/user_name/.rbenv/versions/2.5.0/gemsets/2.5.0/extensions/x86_64-darwin-18/2.5.0-static/mysql2-0.4.10/gem_make.out

mysql2のバージョンとかの問題だと思っているのですが、なかなか解決に繋がっておりません。
どなたかアドバイスいただけますと幸いです。

追記

ご指摘をいただきopensslの再インストールを行い改めてbundle install

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /Users/user_name/app_anem/vendor/bundle/ruby/2.5.0/gems/mysql2-0.4.10/ext/mysql2
/Users/user_name/.rbenv/versions/2.5.0/bin/ruby -r ./siteconf20181127-41841-k7bxey.rb extconf.rb --with-ldflags=-L/usr/local/opt/openssl/lib --with-cppflags=-I/usr/local/opt/openssl/include
checking for rb_absint_size()... yes
checking for rb_absint_singlebit_p()... yes
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for rb_thread_blocking_region()... no
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
checking for rb_big_cmp()... yes
-----
Using mysql_config at /usr/local/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
-----
Setting rpath to /usr/local/Cellar/mysql/8.0.12/lib
-----
creating Makefile

current directory: /Users/user_name/app_name/vendor/bundle/ruby/2.5.0/gems/mysql2-0.4.10/ext/mysql2
make "DESTDIR=" clean

current directory: /Users/user_name/app_name/vendor/bundle/ruby/2.5.0/gems/mysql2-0.4.10/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

current directory: /Users/user_name/app_name/vendor/bundle/ruby/2.5.0/gems/mysql2-0.4.10/ext/mysql2
make "DESTDIR=" install
make: /usr/local/bin/gmkdir: No such file or directory
make: *** [.sitearchdir.-.mysql2.time] Error 1

make install failed, exit code 2

Gem files will remain installed in /Users/user_name/app_name/vendor/bundle/ruby/2.5.0/gems/mysql2-0.4.10 for inspection.
Results logged to /Users/user_name/app_name/vendor/bundle/ruby/2.5.0/extensions/x86_64-darwin-18/2.5.0-static/mysql2-0.4.10/gem_make.out

An error occurred while installing mysql2 (0.4.10), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.4.10' --source 'https://rubygems.org/'` succeeds before bundling.