Check system dependencies for a gem

How I can check which system libraries I need for my gems ?

For example the Mysql gem needs the mysql header files, rmagick requires imagemagick, and so on...

How I can list all libraries needed to 开发者_如何学Pythoninstall the gem ?

If it is not possible, how I can check if all system dependencies are satisfied to install the selected gem ?

---

Use the gem dependency GEMNAME command.

See the documentation here.