Reports

Worked on Ubuntu 24.04:

Get download url from https://downloads.mysql.com/archives/community/

wget https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.44-linux-glibc2.12-x86_64.tar
tar xvf mysql-5.7.44-linux-glibc2.12-x86_64.tar
tar zxvf mysql-5.7.44-linux-glibc2.12-x86_64.tar.gz

Config --with-mysql-config for mysql2

bundle config build.mysql2 "--with-mysql-config=PATH_TO/mysql-5.7.44-linux-glibc2.12-x86_64/bin/mysql_config"
bundle install
# or bundle pristin mysql2

Check if libmysqlclient.so.20 is link to
mysql-5.7.44-linux-glibc2.12-x86_64/lib/libmysqlclient.so.20

for example:

ldd /home/ubuntu/.rvm/gems/ruby-2.3.8/gems/mysql2-0.3.21/lib/mysql2/mysql2.so
        linux-vdso.so.1 (0x00007ff026bda000)
        libruby.so.2.3 => /home/ubuntu/.rvm/rubies/ruby-2.3.8/lib/libruby.so.2.3 (0x00007ff026800000)
        libmysqlclient.so.20 => /home/ubuntu/mysql-5.7.44-linux-glibc2.12-x86_64/lib/libmysqlclient.so.20 (0x00007ff025e00000)
        ...

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