Ruby on Rails捆绑安装mysql2错误

Question

About

Currently, I`m building the Ruby on Rails project environment. However, if I implement bundle install, the following error occurs. I do not know where the cause is, I would like advice.

Environment

• Ruby v2.5.3
• Rails 5.2.2
• MySQL 5.7

Run Command 1

$ bundle install

Output error

Errno::EACCES: Permission denied @ rb_sysopen -
/Users/xxx/project_dir/vendor/bundle/ruby/2.5.0/gems/mysql2-0.5.2/CHANGELOG.md
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.

Run Command 2

$ sudo gem install mysql2 -v '0.5.2' --source 'https://rubygems.org/'

Output error

ERROR:  Error installing mysql2:
    ERROR: Failed to build gem native extension.
current directory: /Users/xxx/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2-0.5.2/ext/mysql2/Users/xxx/.rbenv/versions/2.5.3/bin/ruby -I /Users/xxx/.rbenv/versions/2.5.3/lib/ruby/site_ruby/2.5.0 -r ./siteconf20190220-84910-2gf7i1.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/xxx/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2-0.5.2/ext/mysql2
make "DESTDIR=" clean
current directory: /Users/xxx/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/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

Answer 1

It seems that some system libraries are missing. As far as I understand you are using macos. So please try: xcode-select --install and bundle install

UPDATE We had a private chat with @getty and we came up a solution. The problem was with some missing headers regarding to ruby program. So we fixed the problem like following:

1. rbenv uninstall 2.5.3
2. CC=gcc rbenv install 2.5.3
3. rbenv local 2.5.3
4. bundle install

This solution would be applied to rvm or other version managers.