Option files consist of several lines. Each line contains the setting for one option. An option setting has the form:

option=value

value can be either a string or an integer, depending on the option's requirements. If the option accepts an integer value a base can be specified using notation of the form b%v, where b is the base expressed in base 10 and v is the actual value expressed in base b.

Comments are allowed. Any line that begins with an exclamation point is considered to be a comment and is ignored. Blank lines are also ignored in any option file.