How to Fix \'Gem Install Error: Failed to Build Native Extension (Missing Header Files)\' for the MySQL Gem?

Gem Install Error: Failed to Build Native Extension (Missing Header Files)

When installing the mysql gem, you may encounter an error indicating that gem can't find header files for ruby. To resolve this issue, ensure that the ruby headers are installed.

Solution:

1. Install the ruby development headers suitable for your Linux distribution:

   • Fedora: yum -y install ruby-devel
   • Debian/Ubuntu: sudo apt-get install ruby-dev
   • Ubuntu: sudo apt-get install ruby-all-dev
2. Ensure that MySQL and its server are properly installed and running.

3. Re-run the gem install command, specifying the path to the mysql_config executable using the --with-mysql-config option:

   gem install -y mysql -- --with-mysql-config=/usr/bin/mysql_config

This should successfully build and install the mysql gem. Note that you may need to adjust the mysql_config path for your system.

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