Testing for platform in elisp?

Question

I'm sharing my emacs configuration files between a linux box and an OS X box. The config breaks however when I define a specific font for Emacs.app in the config which is then not available on linux.

Is there a way I can test for the current platform and then execute or skip the OS X specific instructions?

Answer 1

The elisp variable system-type is what you want. So you can write

(if (eq system-type 'darwin)
    (your-macosx-specific-configuration))